JP2001305608A - SHUTTER DEVICE, DEVICE HAVING THE SAME, CAMERA, AND IMAGE DISPLAY - Google Patents

Abstract

(57) [Problem] It is difficult to reduce the size of a so-called short arm type shutter device. SOLUTION: A substrate 1 having a shutter opening 1a, a light-shielding vane 2 running on the shutter opening, and a base end rotatably attached to one of two parts of the substrate on both sides of the shutter opening and a tip end thereof. The first and second arm members 6 and 7 are connected to the one side of the light-shielding blade to form a parallel link, and are engaged with the first arm member to operate to drive the light-shielding blade in the parallel link. In the shutter device including the driving member 20, the one end 2b of the light shielding blade moves with the operation of the driving member before the start of travel of the light shielding blade or in the traveling completed state. The engagement portion 20 between the drive member and the arm member
In the movable area a, the engaging portion is inserted into a portion where the engaging portion is not located.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter device used for a camera, an image display device and other devices.

[0002]

2. Description of the Related Art In a camera or the like, a focal plane shutter of a type that rotatably supports a plurality of divided blade groups by a parallel link mechanism including two arms is often used. As a form of the parallel link mechanism used in such a focal plane shutter, an arm base end is rotatably attached to one of the two sides of the shutter opening in the shutter substrate, and a part on the arm tip side is attached to the shutter base. A long arm type in which the arm group is connected to the other side of the blade group (an arm is disposed so as to extend from one side of the shutter opening to the other side); A short arm type in which the end is rotatably mounted and the end of the arm is connected to the one side of the blade group (the arm is arranged so as not to extend from one side of the shutter opening to the other). There is.

Further, a so-called vertical running focal plane shutter for moving a group of blades in a vertical direction is often used as a focal plane shutter.

[0004] Among such vertical running focal plane shutters, a long arm type shutter is disclosed in J.
As disclosed in Japanese Patent Publication No. 29651, the blade group is rotatably held by the arm on the opposite side of the base end of the arm across the shutter opening. For this reason, the arm becomes longer than the width of the shutter opening.

Further, in the long arm type, since the rotation angle of the arm required for opening and closing the shutter opening by the blade group can be small, the displacement amount in the direction (lateral width direction) orthogonal to the running direction of the blade group due to the opening and closing operation is small. This is advantageous for reducing the width of the shutter. However, if the number of blade groups that can be held by the two arms is set to three or more, the structure becomes complicated, and a long arm is used. There are disadvantages that are disadvantageous.

[0006] For this reason, with the recent increase in the speed of the exposure time of the shutter and the increase of the speed of the flash light emission synchronization time, the long arm type, which is not suitable for the high speed, has been used.

[0007] On the other hand, the short arm type is disadvantageous for miniaturization of the horizontal width as compared with the long arm type, but the arm does not straddle the shutter opening and is located on the side near the arm base end. A large number of blade groups are rotatably held by two arms. Moreover, it is desirable that the length of the arm be as short as possible in order to further reduce the inertia due to the blade travel.

FIG. 19 and FIG. 20 show the configuration and dimensional relationship of each part in such a short arm type focal plane shutter (FIG. 19 shows a traveling ready state, and FIG. 20 shows a traveling completed state, respectively). It has become. In this shutter device, the shutter opening 10
1a, the base ends of the first front curtain arm 106 and the second front curtain arm 107
d and 101e so as to be freely rotatable, and these two front curtain arms 106 and 107 are provided with a slit forming blade 102 and four cover blades 103, which constitute a front curtain having a five-blade configuration.
Parallel links 104, 105, and 105 'are rotatably connected and supported by using blade swaging dowels 108a to 108e and 109a to 109e. Also, the shutter substrate 101 is provided with the base ends of the first rear curtain arm 114 and the second rear curtain arm 115 on the axes 101 f and 101.
g, and a slit forming blade 110 and three cover blades 111, 112, 1 constituting a rear curtain of four blades are attached to these two rear curtain arms 114, 115.
13 and the blade caulking dowels 116a to 116
d, 117a-117d to form a parallel link.

On the front curtain side and the rear curtain side, the arrangement of the blade caulking dowels is straightforward so as to sequentially draw a gentle arc, and the first arm and the second arm are overlapped with the front curtain and the rear curtain, respectively. The two arms are arranged close to each other (hereinafter, this shutter device is referred to as a first conventional example).

Further, from the viewpoint that it is difficult to reduce the size of the parallel link mechanism including two arms, the third link (and further, the
A shutter device in which the size of the shutter device is reduced by adding an auxiliary arm of the present invention is disclosed in Japanese Utility Model Publication No. Hei 6-26896. In this shutter device, when the blades overlap, the support portions of the first and second arms that support the slit-forming blades are accommodated in a storage portion region existing between the viewfinder and the opening window, and the other cover blade group that supports other cover blade groups. The outer dimensions of the shutter device in the left-right direction are reduced by positioning the three arms outside the region.

In this shutter device, since three arms are arranged in a small space, each arm is made thin, and the center of rotation of the base end of the first arm and the third cover are placed in a state where the blades are superimposed. The center of rotation of the third arm is inserted between the swaging dowels of the blades, and the third cover on the first arm is positioned between the center of rotation of the third arm and the swaging dowel of the third covering blade. The caulking dowels of the blades enter (hereinafter, this shutter device is referred to as a second conventional example).

Japanese Utility Model Publication No. Hei 6-26897 discloses that
One of the two main arms that support the slit forming blade is connected to one of the main arms of the other blade, and the other is supported and connected to the other main and auxiliary arms. Thus, there has been disclosed a shutter device that achieves miniaturization and improved durability (hereinafter, this shutter device is referred to as a third conventional example).

Further, as registered utility model No. 2501747, a slit forming blade driven by a first parallel link mechanism and a cover blade driven by a second parallel link mechanism are provided, and the slit forming blade of the first parallel link is provided. The connection distance above is longer than the connection distance on the cover blade of the second parallel link so as to maintain the parallelism of the slit forming blade and to reduce the space from the shutter opening on the base end side of each parallel link. A shutter device has been proposed (hereinafter, referred to as a fourth conventional example).

Japanese Patent Application Laid-Open No. 53-143314 discloses a long arm type shutter device in which a parallel link arm is used in order to reduce the size (reduce the storage space for the blade group when the blades are superposed). And an arm blade that also serves as a cover blade that shields the shutter opening,
A device has been proposed in which a slit blade (slit forming blade) is supported in parallel with a dedicated arm, and the arm blade functions as a cover that fills a space between other covering blades (hereinafter, this shutter device is referred to as a shutter device. 5).

[0015]

Generally, in a shutter device (focal plane shutter), the smaller the number of divided blade groups, the smaller the number of connecting points between the arm and the blade, and the occupation of the connecting points. Since the area is reduced, it is advantageous in reducing the size of the shutter device (particularly, reducing the width). However, when the number of blades is reduced, the amount of overlap between the blades for shielding the shutter opening of a predetermined size is reduced, so that it is difficult to secure the light shielding property.

In the first conventional example, since the length of the arm is short and the number of front curtain blades is as large as five, the spacing of the swaged dowels is narrow while the arrangement of the blades is straight, and the cover blades are rotatable. Since the degree of freedom of the supporting position is reduced, interference within the blade unit (for example, in FIG. 20, the outer periphery of the base end portion 106b of the first arm 106 and the blade caulking
Interference with the outer periphery of the second arm 107 and the covering blade 105 'located around the periphery of the blade 09', and the outer periphery of the first arm 106 located around the blade caulking dowel 108e and the second around the blade caulking dowels 109c and 109d. Arm 1
07 and interference with the outer periphery of the cover blades 104 and 105), and the rotation operation angle of the arm cannot be increased. (If the length of the arm of the parallel link is shortened as long as the size of the shutter opening in the blade running direction is constant, In order to move the blade by a predetermined distance, the rotation angle of the arm needs to be increased.) In addition, there is an inconvenience that it is difficult to maintain the amount of overlap between the slit forming blade and the covering blade when the blade is deployed, and it is not possible to significantly reduce the size.

Further, when a four-blade configuration similar to that of the rear curtain is commonly used for the front curtain, as shown in FIG. 20, the overlapping amount of each blade when the rear curtain is deployed is reduced to about 2 mm. . For this reason, even if the width of each blade is widened in the range where the blade storage space permits in the superimposed state of the first curtain, the arrangement of the blade caulking dowels is also kept straight, as in the case of the five-blade configuration described above. Clogging, the freedom of the rotatable support position of the cover blade is reduced due to the restriction of the position of the blade caulking dowel, and interference in the blade unit (for example, in FIG. 19, the outer periphery of the base end 114b of the first arm 114 in the first arm 114). And second arm 11 located around blade caulking dowel 117d
5 and interference with the outer periphery of the covering blade 113, the blade caulking dowel 1
The outer periphery of the first arm 114 located around 16 d and the second arm 1 located around the blade swaging dowel 117 c
15 and interference with the outer periphery of the cover blade 112). Therefore, the blade width is 1 mm more in the direction opposite to the blade running direction.
In this case, the desired amount of blade overlap of 4 mm cannot be ensured, and the size cannot be significantly reduced (see the description of the arrangement of the blade caulking dowels later).

Further, the second conventional example (Japanese Utility Model Publication No. 6-26)
In the shutter device disclosed in Japanese Patent Application Publication No. 896, the third arm for supporting the cover blade group is added, so that the structure is compared with a general parallel link mechanism having two arms as in the first conventional example. It becomes complicated, the operating resistance increases, and the inertia of the blade unit increases. Further, since the three arms are arranged in a small space, each arm becomes thin, and there is a disadvantage that the strength of the arms themselves is weak. In addition, since the support portions of the first and second arms that support the slit forming blades are accommodated in the storage area between the finder and the opening window when the blades overlap, the connection distance of the parallel link on the slit forming blades is set. Is shortened, and it is difficult to maintain the parallelism of the exposure slit.

Further, the third conventional example (Japanese Utility Model Publication No. 6-26)
897, a third arm (auxiliary arm) for supporting a cover blade group is added, as in the second conventional example, so that two shutters as in the first conventional example are provided. As compared with a general parallel link mechanism using an arm, the structure becomes complicated, the operating resistance increases, and the inertia of the blade unit increases. In addition, the number of arms is increased in order to distribute the load to the arms. However, since three or more arms are arranged in the space reduced by miniaturization, each arm becomes thin, and eventually, each arm becomes thin. There is a disadvantage that the strength of the arm itself is reduced.

In the fourth conventional example (the shutter device of Japanese Utility Model Registration No. 2501747), one blade unit has two parallel link mechanisms, and the third arm (and the third arm) supports the cover blade group. 4), the structure is more complicated than that of a general parallel link mechanism using two arms as in the first conventional example, the operating resistance is increased, and the inertia of the blade unit is increased. is there. In addition, since three or four arms are arranged in the space reduced by the miniaturization, each arm becomes thin, and the strength of the arm itself becomes weak.

Further, in any of the first to fourth conventional examples (short arm type shutter device), the first curtain
Both the rear curtain and the end of the slit forming blade on the base side of the arm (particularly, the end of the slit forming edge on the base side of the arm)
However, it is connected to the arm of the blade unit so as to fit therethrough and does not enter the movable area of the drive pin of the blade drive lever that drives this arm. This is because the following two inconveniences occur when the end of the slit forming blade of the deployed blade unit at the base end side of the arm enters the movable area of the drive pin on the other blade during blade deployment. It is.

First, as shown in FIG. 21, when charging the shutter, the front curtain 202 does not open the shutter opening 201a in order to maintain the light shielding property.
The state shifts to a state in which the shutter opening 201a is closed (deployed state) earlier, and at this time, the drive pin 220a of the leading shutter drive lever is attached to the end 210b on the base end side of the arm of the slit forming blade of the trailing shutter. May interfere with each other.

The other is, as shown in FIG. 22, the rear curtain 21 despite the fact that the shutter has been charged due to a failure or the like.
In the case where the holding of the first curtain at the running start position does not function, after the charging mechanism is retracted, the driving pin 22 of the rear curtain driving lever is attached to the end portion 202b of the slit forming blade of the front curtain at the base end side of the arm.
This is because 1a may interfere.

However, at the time of overlapping the blades, in the leading blade and the trailing blade, the end of the slit forming blade on the arm base side is
The above two inconveniences do not occur when the blade enters the movable area of the drive pin of the blade drive lever connected to the arm of its own blade unit. However, any of the first to fourth conventional examples (short arm type shutter device)
Also does not take such a configuration.

On the other hand, in a shutter device of the same type as the above-mentioned fifth conventional example of a long arm type (a shutter device proposed in Japanese Patent Application Laid-Open No. 53-143314), when the blades are overlapped, the slits are formed in the front curtain and the rear curtain. It is possible to adopt a configuration in which the end portion on the base end side of the arm of the forming blade enters the movable area of the driving pin of the blade driving lever connected to the arm of its own blade unit (see, for example, Japanese Patent Application Laid-Open No. SHO53-53). -14
No. 3314, see FIGS. 12 to 14).

However, this is an accidental result from the structure for operating the cover blade in the pin-slot connection, which is an advantage of the long arm type, in which the arm operating angle is small and the drive pin movable area of the blade drive lever is small. It is not based on the fact that the degree of freedom of arrangement is large. Furthermore, it is not intended to reduce the size of the shutter in the lateral direction. Incidentally, in the short arm type shutter device, if the drive pin movable region approaches the corner of the shutter opening, it becomes difficult to arrange the blade group. For this reason,
In the end, as described above, if the number of blade groups that can be held by two arms is three or more, the structure becomes complicated,
There are drawbacks that the resistance is large when the light-shielding blade is operated by the pin-slot combination, and that the long arm increases the inertia of the blade unit and is disadvantageous for high-speed traveling.

Therefore, in the second to fifth conventional examples,
This is disadvantageous for high-speed running of the blade unit. For example, a camera realizes an exposure time shorter than 1/4000 second,
It is difficult to achieve a flash synchronization time shorter than / 200 seconds. In addition, since the shutter charge energy required to realize the same curtain speed increases, there is a problem that the size of the camera is increased and that there is a problem in increasing the frame speed during continuous shooting.

In view of the above, the present invention has a simple structure, is small in size, in particular, has a small size in a direction perpendicular to the blade traveling direction, and can secure a blade overlapping amount for light shielding.
It is an object of the present invention to provide a shutter device that has a small inertia of a blade unit, has a high operation efficiency, and is suitable for high-speed operation.

[0029]

In order to achieve the above object, according to a first aspect of the present invention, a substrate having a shutter opening, a light-shielding vane running on the shutter opening, and a base end having a shutter opening in the substrate are provided. First and second arm members rotatably attached to one of the opposite side portions of the light-shielding blade and having a distal end connected to the one side of the light-shielding blade to form a parallel link; and a first arm. A driving member that is engaged with the member and drives the light-shielding blade in parallel link, the one end of the light-shielding blade (for example, the front edge of the light-shielding blade in the traveling direction or The driving member and the arm member, which move along with the operation of the driving member before the start of the movement of the light-shielding blade or in the state of completion of the movement, in which the rear edge of the traveling direction extends to the one side. The engagement portion of the movable region of the engaging portion of the are as entering the portion not located.

According to the second aspect of the present invention, a substrate having a shutter opening, a group of light-shielding vanes running on the shutter opening to be in a superimposed state and an expanded state, and a base end portion on both sides of the shutter opening in the substrate A first and a second arm member rotatably attached to one of the first and second ends, and a portion closer to the distal end than the base end is connected to the one side of the light-shielding blade group to form a parallel link; A driving member that is engaged with the first arm member and that drives the light-shielding blade group to travel by a parallel link, wherein at least one of the light-shielding blade groups (for example, the arm The end on one side of the light-shielding blade connected to the most distal end of the member (for example, the front edge in the traveling direction or the rear edge in the traveling direction of the light-shielding blade is extended to the one side. Portion) is inserted into a portion of the movable region of the engaging portion between the driving member and the arm member, which moves with the operation of the driving member, in a state where the engaging portion is not positioned, in a state where the light shielding blade group is superimposed. ing.

More specifically, in the first and second aspects of the invention, for example, the end of the one side of the light-shielding blade is engaged before the light-shielding blade starts running or when the light-shielding blade group is superimposed. In the movable area of the part, it enters the part before the engagement part passes after the start of the light-shielding blade travel, and during the travel from the start of the light-shielding blade travel to the completion of travel or during the travel to the deployed state of the light-shielding blade group, The engaging portion is moved out of the movable region.

In the first invention, the one end of the light-shielding blade is located outside the movable area of the engaging portion before the light-shielding blade starts running, and the light-shielding blade starts running. Between a later time and the completion of traveling, the movable area of the engaging portion may enter a portion after the passing of the engaging portion.

That is, in the first and second inventions of the present application, in the so-called short arm type shutter device, the above-described shutter device is provided so that operation interference does not occur in the blade unit including the light shielding blade, the arm member, and the driving member. The space serving as the movable area of the joint portion is defined as a movable space of an end portion of the light-shielding blade on the base end side of the arm (for example, a portion of the light-shielding blade extending to the one side of the front edge in the traveling direction or the rear edge in the traveling direction). By sharing them with a time lag, it is possible to extend the arm base end of the light-shielding blade sufficiently to the one side. Thus, without complicating the structure of the blade unit, the size of the shutter device can be reduced, and in particular, a direction extending to the side where the base end portion of the arm member is disposed and the opposite side (for example, a direction perpendicular to the blade traveling direction). The size of the shutter can be reduced, interference does not occur in the blade unit, light-shielding properties can be secured, and furthermore, the operating resistance and inertia can be reduced to realize a shutter device suitable for high-speed operation. .

According to the third aspect of the present invention, the substrate having the shutter opening, the front curtain light-shielding vane running from the side where the shutter opening is closed to the side where it is opened, and the substrate running from the side where the shutter opening is opened to the side where the shutter opening is closed. A rear link light-shielding vane, a base end of which is rotatably attached to one of the portions of the substrate on both sides of the shutter opening, and a front end portion of which is connected to the one side of the front curtain light-shielding blade and has a parallel link. A first and second front curtain arm member, a front curtain drive member that operates by engaging with the first front curtain arm member, and drives the front curtain light shielding blade to travel by a parallel link; A first and a second rear curtain arm member rotatably attached to the one portion of the substrate and having a leading end connected to the one side of the rear curtain light shielding blade to form a parallel link; A rear curtain driving member that operates by engaging with the rear curtain arm member and drives the rear curtain light shielding blade to travel by a parallel link; However, before the start of the movement of the front curtain light-shielding blade, the movable area of the front curtain side engaging portion, which is the engaging portion between the front curtain driving member and the front curtain arm member, which moves with the operation of the front curtain driving member. In the traveling completed state of the front curtain light-shielding blade, it enters a portion where the front curtain-side engagement portion is not located in the movable area of the front curtain-side engagement portion, and the one of the rear curtain light-shielding blades The rear curtain side engaging portion is an engagement portion between the rear curtain driving member and the rear curtain arm member, which moves along with the operation of the rear curtain driving member before the rear curtain light shielding blade starts running. Of the movable area of the joint portion, where the rear curtain side engaging portion is not located. Cage, and so as to be positioned outside the movable area of the rear curtain side engaging portion by the running completion state of the rear curtain shielding blade.

Further, in the fourth invention of the present application, the substrate having the shutter opening, the front curtain light-shielding vane group running on the shutter opening to be in the superimposed state from the deployed state, and the substrate running on the shutter opening to be in the superimposed state. A rear curtain light-shielding blade group to be in an unfolded state, and a base end portion rotatably attached to one of two portions of the substrate on both sides of the shutter opening, and a front end light-shielding blade at a portion more distal than the base end portion. First and second front curtain arm members connected to one side of the group to form a parallel link, and the front curtain light blocking vanes engaged with the first front curtain arm member and operated by the parallel link. A front-curtain drive member that is driven to travel, and a base end is rotatably attached to the one part of the substrate and a part that is more distal than the base end is connected to the one side of the rear-curtain light-shielding blade group. Parallel A first and a second rear curtain arm member constituting a shutter, and a rear curtain driving member which engages with the first rear curtain arm member and operates to drive the rear curtain light blocking blade to travel by a parallel link. In the apparatus, at least one end of at least one front curtain light shielding blade of the front curtain light shielding blade group (for example, a forming edge of a front curtain side slit forming blade connected to the most front end side of the front curtain arm member). Is extended to the one side), the movable area of the front curtain side engaging portion, which is the engaging portion between the front curtain driving member and the front curtain arm member, in the deployed state of the front curtain light blocking blade group. It is located outside and, in the superposed state of the front curtain light shielding blade group, enters the portion where the front curtain side engagement portion is not located in the movable area of the front curtain side engagement portion, and One end of the one side of at least one rear curtain shading blade (e.g., For example, when the slit forming edge of the rear curtain slit forming blade connected to the most front end side of the rear curtain arm member extends to the one side, the rear curtain light shielding blade group is superimposed on the rear curtain. In the movable area of the rear curtain side engaging portion which is the engaging portion between the driving member and the rear curtain arm member, the rear curtain side engaging portion has entered a portion where the rear curtain side engaging portion is not located,
In a deployed state of the rear curtain light shielding blade group, the rear curtain light blocking blade group is located outside the movable area of the rear curtain side engaging portion.

More specifically, in the third and fourth aspects of the invention, for example, the end of the front curtain light-shielding blade on one side is set before the front curtain light-shielding blade starts running or the front curtain light-shielding blade group is deployed. In the state, it is located outside the movable area of both the front curtain side engaging portion and the rear curtain side engaging portion, and from the start of traveling of the front curtain light shielding blade to the completion of travel or of the front curtain light shielding blade group. When traveling to the superimposed state, the movable region of the front curtain side engaging portion enters into the portion after the front curtain side engaging portion has passed, and the end of the one side of the rear curtain light shielding blade is this rear curtain. Before the start of travel of the light-blocking blades or in the superimposed state of the rear-curtain light-blocking blade group, in the movable area of the rear-curtain-side engagement portion, before the rear-curtain-side engagement portion passes after the start of travel of the rear-curtain light-blocking blade. The trailing shutter blades are intruding from the start of travel of the trailing curtain shield blades to the completion of travel or the trailing curtain shield blades. So as to move out of the movable area both of the rear curtain side engaging portion and the front curtain side engaging portion during the running of the group of expanded state.

That is, in the shutter device according to the third and fourth aspects of the present invention, the operation interference does not occur in the blade unit including the light shielding blade, the arm member, and the driving member on the front curtain side and the rear curtain side. The space which becomes the movable area of each of the engaging portions is set to the arm base end of the front curtain and rear curtain light shielding blades (for example, to the one side of the front edge in the traveling direction or the rear edge in the traveling direction of the light shielding blade). ), It is possible to extend the arm base end portions of the front curtain and rear curtain light shielding blades sufficiently to the one side. And by this, without complicating the structure of the blade unit,
It is possible to reduce the size of the shutter device, especially in the direction extending in the direction in which the base end portion of the arm member is disposed and in the direction opposite thereto (for example, in the direction orthogonal to the blade traveling direction), and to reduce interference in the blade unit. Does not occur, light-shielding properties can be ensured, and a shutter device suitable for high-speed operation can be realized by reducing operation resistance and inertia.

Before the front curtain light-shielding blades start running or in a deployed state of the front curtain light-shielding blades, the one end of the front curtain light-shielding blades is engaged with the front curtain side engaging portion and the rear curtain side engaging portion. Position, the rear curtain is not held at the position before the start of travel due to a failure that occurred on the rear curtain side, and even if only the rear curtain has run, the rear curtain side It is possible to prevent the end on the one side of the front curtain light shielding blade from interfering with the engaging portion. Further, in the running completion state of the rear curtain light shielding blade or the deployed state of the rear curtain light shielding blade group, the end on one side of the rear curtain light shielding blade,
By locating outside the movable area of both the rear curtain side engaging portion and the front curtain side engaging portion, when the front curtain is charged and driven ahead of the rear curtain by the shutter charge after traveling is completed, The end of the one side of the rear curtain light shielding blade can be prevented from interfering with the front curtain side engaging portion.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 4 show the configuration of a focal plane shutter for a camera according to a first embodiment of the present invention. FIG. 1 shows a running preparation completed state (a state before starting running), and FIG. 2 shows a running completed state. FIGS. 3 and 4 are diagrams for explaining the points of the present embodiment.

In these figures, reference numeral 1 denotes a plastic shutter base plate (substrate) having a shutter opening, 1a denotes a shutter opening formed substantially at the center of the shutter base plate 1, and 1b denotes a front curtain drive lever (first curtain described later). Drive member) 2
In order to escape the movable area of the drive pin 20a formed on the shutter base plate 1, the lower part of the shutter base plate 1 on the left side of the shutter opening ("one of the two parts on both sides of the shutter opening" in the claims). Formed arc-shaped slot, 1
Reference numeral c denotes an arc-shaped long hole formed above the left portion of the shutter base plate 1 to escape the movable area of the drive pin 21a of the rear curtain drive lever (rear curtain drive member) 21 described later.

Reference numeral 2 denotes a front curtain slit forming blade (first curtain light shielding blade: hereinafter, referred to as front curtain # 1 blade). Reference numeral 2a denotes a front curtain slit forming edge of the front curtain slit forming blade 2, and 2b denotes a front curtain slit forming edge 2a. Is the end of the leading edge slit forming edge 2a formed to extend to the left side in the figure on the base side of the arm ("the end on one side of the light-shielding blade" in the claims).

3 to 5 are front curtain covering blades (first curtain shading blades)
In this order, 3 is the first curtain # 2 blade, 4 is the first curtain # 3 blade, and 5 is the first curtain # 4 blade.

Reference numeral 6 denotes a first curtain first arm (first first curtain arm member) whose base end 6b is located below the left side of the shutter base plate 1 around a shaft 1d integrally formed with the shutter base plate 1. It is rotatably attached to. In addition, a lower left portion of the front curtain slit forming blade 2 is rotatably connected to a distal end portion of the front curtain first arm 6 by a caulking dowel 8a. Reference numeral 6a denotes a hole for allowing the drive pin 20a of the front curtain drive lever 20 to penetrate and engage in the drive direction without play. When the hole is engaged with the drive pin 20a (the engagement portion is on the front curtain side). The driving force is transmitted to the first arm 6 of the front curtain from the front curtain drive lever 20 that rotates about an axis extending from the axis 1d as a rotation axis.

Reference numeral 7 denotes a second arm of a first curtain (a second arm member of a second curtain), and a base end 7b thereof is provided at a substantially vertical center of a left portion of the shutter base plate 1 in a vertical direction, and a shaft 1e integrally formed with the shutter base plate 1. It is rotatably mounted around. In addition, an upper left portion of the front curtain slit forming blade 2 is rotatably connected to a distal end portion of the front curtain second arm 7 by a caulking dowel 9a. In this way, the front curtain slit forming blade 2 and the front curtain first and second curtain second arms 6 and 7 form a parallel link for running the front curtain slit forming blade 2.

Similarly, the left portions of the front curtain covering blades 3, 4, and 5 are provided between the first arm 6 of the front curtain and the second arm 7 of the front curtain at the caulking dowels 8b, 9b, 8c, 9c, 8d and 9d. , So that a parallel link for running the front curtain cover blades 3, 4, 5 is formed. The turning radius of the drive pin 20a (that is, the shaft 1
The turning radius of the caulking dowel 8d for the leading blade # 4 blade (the distance between the shaft 1d and the caulking dowel 8d) located at the most proximal side on the front curtain first arm 6 is determined by the distance between the shaft and the driving pin 20a. Distance). Thus, a front curtain unit (blade unit) is configured.

On the other hand, the rear curtain is configured similarly to the front curtain. That is, reference numeral 10 denotes a rear curtain slit forming blade (rear curtain light shielding blade: hereinafter, referred to as a rear curtain # 1 blade), and reference numeral 10a denotes a rear curtain slit forming edge of the rear curtain slit forming blade 10.
Is a base end side of the arm of the rear curtain slit forming edge 10a formed by extending the rear curtain slit forming edge 10a to the left side in the figure ("the end on one side of the light shielding blade" in the claims). ).

Reference numerals 11 to 13 denote rear curtain cover blades (rear curtain light shielding blades). Reference numeral 11 denotes a rear curtain # 2 blade, 12 denotes a rear curtain # 3 blade, and 13 denotes a rear curtain # 4 blade.

Reference numeral 14 denotes a rear curtain first arm (a first rear curtain arm member), and a base end portion 14b thereof is disposed above a left portion of the shutter base plate 1 around an axis 1f integrally formed with the shutter base plate 1. It is rotatably mounted. In addition, the second curtain
An upper left portion of the rear curtain slit forming blade 10 is rotatably connected to a tip end of the arm 14 by a caulking dowel 16a. Reference numeral 14a denotes a hole through which the drive pin 21a of the rear curtain drive lever 21 penetrates and engages in the driving direction without play. The hole is engaged with the drive pin 21a. A driving force is transmitted to the rear curtain first arm 14 from the rear curtain drive lever 21 that rotates about an axis extending from the shaft 1f as a rotation axis.

Reference numeral 15 denotes a rear curtain second arm (a second rear curtain arm member). A base end 15b is provided at a substantially vertical center of a left portion of the shutter base plate 1 in the vertical direction, and a shaft 1g integrally formed with the shutter base plate 1. It is rotatably mounted around. A caulking dowel 17 is provided at the tip of the second arm 15 of the second curtain.
The lower left side of the rear curtain slit forming blade 10 is rotatably connected by a. In this manner, the trailing shutter slit forming blade 10, the trailing curtain first and trailing curtain second arms 14, 15 are provided.
Thus, a parallel link for running the trailing shutter slit forming blade 10 is formed.

Similarly, the left portions of the rear curtain covering blades 11, 12, and 13 are provided with the rear curtain first arm 14 and the rear curtain second arm 15 respectively.
In the middle of the caulking dowels 16b, 17b, 16c, 17
are rotatably connected by c, 16d, 17d,
Thereby, parallel links for running the rear curtain cover blades 11, 12, and 13 are formed. The driving pin 2
The turning radius of shaft 1f (that is, the distance between the shaft 1f and the drive pin 21a) is the turning radius (shaft) of the caulking dowel 16d for the rear curtain # 4 blade located at the most proximal side on the rear curtain first arm 14. (The distance between the shafts 1f and 16d). The rear curtain unit (blade unit) is configured as described above.

In the focal plane shutter constructed as described above, the arm base side end 2b of the front curtain slit forming edge 2a is in the travel ready state shown in FIG.
The movable area of the drive pin 21a (that is, the shutter base plate 1) does not interfere with the drive pin 21a of the rear curtain drive lever 21.
(A position overlapping the upper slot 1c in the optical axis direction). Also, in the traveling completed state of FIG.
The arm base end 2b of the front curtain slit forming edge 2a is located within the movable area of the drive pin 20a (that is, the shutter base plate 1).
(A position overlapping the upper slot 1b in the optical axis direction).

On the other hand, the arm base end 10b of the rear curtain slit forming edge 10a enters the movable area of the drive pin 21a in the traveling preparation state of FIG. 1, and in the traveling completion state of FIG. Is located near the outside of the movable region of the drive pin 20a so as not to interfere with the drive pin 20a of the front curtain drive lever 20.

In the front curtain unit and the rear curtain unit, the arms 6, 7, 1
Although the lengths of the shutters 4 and 15 are shortened, if the length of the arm of the parallel link is shortened as long as the size of the shutter opening 1a in the blade running direction is constant, the blades are moved by a predetermined distance. It is necessary to increase the rotation operation angle of the arm. As described above, when an attempt is made to increase the rotation angle of the arm, in the blade overlapping state in the blade unit having the four-blade configuration, the first arm 11 as in the first conventional example is used.
4 on the base end portion 114b and the blade caulking dowels 116c, 11
6d, the blade caulking dowel 1 on the second arm 115
In an arrangement in which the shutters 17b, 117c, and 117d contact each other, the arm rotation operation angle cannot be increased, and it is difficult to reduce the size of the shutter. Therefore, in order to increase the arm rotation operating angle, FIG.
As shown in FIG. 2 and FIGS. 2A and 2B, the base ends 6b and 14b of the first arms 6 and 14 of the first and second curtains and the caulking dowels 8d and 16
The arrangement in which the swaging dowels 9b, 9c, 9d, 17b, 17c, 17d on the second arms 7, 15 of the front curtain and the rear curtain do not come into contact with d.

Further, at least two blades (# 3 blade, # 4 blade) arranged on the side close to the base end of the arm
12 and 13 caulking dowels 8c, 9c, 8d, 9d and 16
c, 17c, 16d, and 17d approach the left side end 11 of the outer shape of the shutter base plate 1 as much as possible, and the side end 11
If it can be arranged along, the effect of miniaturization will be great.

As a specific example, in the rear curtain of the first conventional example, the arm rotation operation angle is not increased, and the wings 116c of the two wings 112 and 113 arranged on the side close to the base end of the wing are superposed with the wings superposed. , 117c, 116d, and 117d cannot approach the side end 1011 of the outer shape of the shutter base plate and cannot be arranged along the side end 1011. Therefore, the horizontal distance between the caulking dowels 116c and 116d and the horizontal distance between the caulking dowels 117c and 117d are 3.08 mm. The dimension of the whole shutter in the direction (left-right direction) perpendicular to the blade traveling direction is increased. From this, it can be easily expected that even if an attempt is made to reduce the size by following the arrangement relationship of the blade caulking dowels and the like as in the first conventional example, it cannot be made too small.

On the other hand, in the present embodiment, in both the front curtain unit and the rear curtain unit, the arm base end (2b, 10b) of the slit forming edge of the unit in the blade overlapping state is the unit side. Drive pins (20
a, 21a) is allowed to enter the movable area, and the swaging blades and the like are arranged so as to alternately enter, so that the rotation operating angles of the arms 6, 7, 14, 15 can be greatly increased. Moreover, two blades (# 3 blade, # 4 blade) arranged on the side near the arm base end in the blade superposed state
Wings) 4,5,12,13 caulking dowels 8c, 9c, 8
d, 9d, 16c, 17c, 16d, and 17d can be close to the side end 11 of the outer shape of the shutter base plate 1, and can be arranged along the side end 11.

For this reason, the horizontal distance between the caulking dowels 8c and 8d and the horizontal distance between the caulking dowels 9c and 9d of the front curtain unit in the blade superimposed state are 0.44 mm.
Also, the caulking dowel 16 of the rear curtain unit in a state where the blades are superimposed.
c, 16d and the right and left distance and the caulking dowel 17c,
The horizontal distance between 17d is 0.77 mm. Furthermore,
If the overcharge angle is considered as a maximum of 4 °, the distance in the left-right direction in the blade superimposed state can be made almost 0 (zero) mm in both the front curtain unit and the rear curtain unit. Therefore, it can be seen that the effect of reducing the size of the entire shutter particularly in the direction (left-right direction) perpendicular to the blade running direction is enormous.

Next, the operation of the focal plane shutter configured as described above will be described. In the running preparation completion state of FIG. 1, the leading shutter drive lever 20 and the trailing shutter drive lever 21 are each attracted and held by a time control magnet (not shown). At this time, the arm base end 2b of the front curtain slit forming edge 2a is located outside the movable area of the drive pin 21a (near the outside of this movable area). This is because the rear curtain is not held in the traveling preparation position due to a failure such as poor suction in the second control magnet on the rear curtain side, and the rear curtain is driven so that only the rear curtain closes the shutter opening 1a. This is to prevent the arm base end 2b of the leading edge slit forming edge 2a from interfering with the drive pin 21a of the lever 21.

At this time, the rear curtain slit forming edge 10
The base end 10b of the arm a moves into the movable area of the drive pin 21a, but moves out of the movable area of the drive pin 21a when the deployment operation of the rear curtain unit is started. There is no interference with the drive pin 21a of the lever 21.

When the suction of the front curtain time control magnet is first released by the shutter release signal, the front curtain drive lever 20 is rotated clockwise by the urging force of the front curtain drive spring (not shown). Accordingly, the first and second arms 6, 7 are driven to rotate in the same direction.

Along with this, the front curtain slit forming blades 2 and the front curtain covering blades (first curtain # 2 blade, front curtain # 3 blade, front curtain # 4 blade) 3, 4, and 5 which have been deployed are parallel links. , The leading edge slit forming edge 2a and the leading edge covering blades 3, 4, 5 are kept parallel to the long side 1h of the shutter opening 1a from the upper side to the lower side of the shutter opening 1a, and are superposed. Becomes Thus, the front curtain unit is in a state of opening the shutter opening 1a as shown in FIG.

After the attraction of the front curtain time control magnet is released, after a predetermined time corresponding to the set exposure time,
When the suction of the rear curtain time control magnet is released, the rear curtain drive lever 21 is pressed by the urging force of the rear curtain drive spring (not shown).
Rotates clockwise, whereby the first and second rear curtain arms 14 and 15 are driven to rotate in the same direction.

Accordingly, the rear curtain slit forming blades 10 and the rear curtain covering blades (the rear curtain # 2 blade, the rear curtain # 3 blade, and the rear curtain # 4 blade) 11, 12, and 13 which are in the superimposed state are parallel links. , The rear curtain slit forming edge 10a and the rear curtain cover blade 11,
The vehicle travels from above to below the shutter opening 1a while keeping the members 12 and 13 parallel to each other to be in a developed state. In this manner, the rear curtain unit closes the shutter opening 1a as shown in FIG. 2, and the exposure ends.

After the exposure is completed, the shutter charge mechanism (not shown) rotates the front curtain and rear curtain drive levers 20 and 21 counterclockwise with the front curtain side ahead of the rear curtain side. The front curtain and the rear curtain unit are moved to the state of FIG. 1 while keeping the slit between the front curtain and the rear curtain.

Here, in the running completed state in FIG. 2, the rear end side slit 10b of the rear curtain slit forming edge 10a is
When the front curtain moves first to close the shutter opening 1a during shutter charging, the front curtain drive lever 2
0 drive pin 20a so as not to interfere with the drive pin 20a.
Is located outside the movable range of

When the traveling is completed as shown in FIG. 2, the arm base end 2b of the leading edge slit forming edge 2a is
0a, but moves out of the movable area of the drive pin 20a when the front curtain unfolding operation (charging operation) is started, so that it interferes with the drive pin 20a of the front curtain drive lever 20. There is no.

Here, the focal plane shutter of this embodiment is mounted on a single-lens reflex camera using a silver halide film of 135 format. In this case, the vertical dimension A of the shutter opening 1a is 24.7.
mm, and the dimension in the left-right direction is 36.6 mm. Since the size of the shutter opening 1a in this format is determined by the standard, the only way to reduce the size of the shutter as a whole is to reduce the components around the shutter opening 1a.

Therefore, the width in the left-right direction of the left portion of the shutter opening 1a in the shutter base plate 1 (the dimension between the left end surface of the shutter opening 1a and the left end surface of the shutter base plate 1) is B,
The width of the right side of the shutter opening 1a in the shutter base plate 1 in the left-right direction (the dimension between the right end surface of the shutter opening 1a and the right end surface of the shutter base plate 1) is C, and a slit is formed from the rotation center of the base end of the arm to the end of the arm. The dimension (arm length) to the swivel dowel rotation center for connecting the blades 2 and 10 is D, the maximum operating angle around the rotation center of the arm is θ, and the base ends of the first and second arms forming one parallel link The point of interest for reducing the size of the shutter will be described with the distance between them being E.

Regarding the Number of Blades Rotably Connected to the Arm In the first embodiment, the front curtain and the rear curtain each have a four-blade configuration. When a five-blade configuration is adopted, the predetermined amount of blade overlap required for shading by the front curtain in the unfolded state in the state in which the camera has been fully charged for winding (a recent camera with a built-in motor has to wait for the next photographing in this state). (In the first embodiment, as shown in FIG.
mm, and 4 mm as shown in FIG. 19 in the first conventional example, the height of one blade can be made smaller for five blades. The larger the number of blade groups, the smaller the blades can be folded in the superimposed state of the blades.

However, simply, as the number of blade groups increases, the number of locations where the blades are connected to the arm increases, so that the arm length increases, so that the lateral dimension orthogonal to the blade traveling direction increases. Further, even if the arm length is not increased as much as possible (the first conventional example corresponds to this), the margin on the arm decreases as the number of blade connection points increases,
It becomes difficult to reduce the lateral dimension of the shutter. In addition, the overlap portion of the blades is one more in the case of five blades than in the case of four blades, the total blade area is increased, and in addition to the addition of one blade connection point, the inertia of the entire blade unit is reduced. It will surely increase, which is disadvantageous for high-speed driving.

On the other hand, in the case of three blades, the number of blade connection points on the arm is reduced, and the margin on the arm is increased.
This is advantageous for reducing the lateral dimension of the shutter. However, a predetermined blade overlap amount in the blade deployed state (for example,
Under the condition of 4 mm), the small size cannot be folded in the state where the blades are superimposed, so that the size in the vertical direction corresponding to the blade traveling direction of the shutter becomes large. If an attempt is made to reduce the size in the vertical direction, the amount of overlap between the blades in the expanded state of the blades is reduced, so that light shielding properties cannot be maintained. As a result, the three blades have a poor balance of the vertical and horizontal dimensions of the shutter, and are difficult to mount on a camera.

Actually, in order to secure the blade overlap amount capable of realizing a sufficient light shielding performance, to achieve a good balance of the aspect ratio of the shutter, and to effectively reduce the width, the first curtain as in the first embodiment is required. The four-blade configuration is optimal for both the rear curtain and the rear curtain.

Arm Length D With regard to the arm length D, the four blade groups are rotatably connected and supported, and the vertical dimension A of the shutter opening 1 a can be sufficiently moved by the slit forming blades 2, 10. The minimum length is as follows.

Regarding the Maximum Operating Angle θ of the Arm When the arm length D is reduced as described above, the shutter opening 1 a
In order for the moving distance of the slit forming blades 2 and 10 to clear the vertical dimension A of the above, the angle θ must be naturally increased accordingly.

Regarding the arm-to-arm dimension E When the arm maximum operating angle θ increases, the arm-to-arm dimension E
However, if the conventional method is used, interference between the first and second arms, particularly interference between the blade connecting portions occurs between the time when the blade is deployed and the time when the blade is superimposed, and a sufficient operating angle cannot be obtained.

When the arm operating angle increases, the portion of the slit forming blades 2 and 10 opposite to the arm connecting portion side (hereinafter referred to as the distal end side) is opened in a state close to the blade expanding state and the overlapping state. Many go into 1a. This is because there is a play at the arm connecting portion to be fitted to the caulking dowel, and the play is enlarged toward the distal end farther from the arm connecting portion, so that the parallelism of the slit forming blades 2 and 10 (slit forming edges 2a and 10a) is reduced. Means worse.

In order to solve the above two problems, the dimension E between the first and second arms is increased. Also, from the characteristics of the parallel link, by expanding the span between the arms forming the parallel link, the stability of the parallelism during operation of the slit forming blade supported by the arm is improved.

Regarding the lateral width C of the right side portion of the shutter base plate 1 When the arm length D is shortened and the arm maximum operating angle θ is increased, the traveling direction when the blade group (particularly, the slit forming blades 2 and 10) travels The displacement amount in the direction perpendicular to the direction becomes large, and it is disadvantageous to reduce the width C in the left-right direction.

However, the slit forming blades 2, 10
Corners 2c, 1 of the slit forming edges 2a, 10a
R of 0c is reduced to the minimum necessary, the slit forming edge is provided to the very end of the blade, the length of the slit forming blade is cut off, or the tip shape of each blade is simply formed into a linear shape along the end surface of the shutter base plate 1. The blade tip and the shutter base plate 1 or the cover plate (not shown) when the blade is deployed
The width C in the left-right direction can be reduced by making the amount of engagement with the peripheral portion of the shutter opening 1a at the same level as that of the related art in order to secure light-shielding properties and to prevent blades from coming off against pressing by fingers or the like due to carelessness of the photographer. it can.

FIG. 3 shows the relationship between the arrangement of the caulking dowels and the trailing-curtain slit forming blades 10, and FIG. 4 shows the arrangement of the caulking dowels and the shading by the rear curtain. Shows the relationship. FIGS. 3 and 4 show the middle of the trailing curtain. Also,
Since the first and second curtain units have the same structure,
Here, the rear curtain unit will be mainly described.

In these figures, the two-dot chain line
Is a caulking dowel for the trailing curtain # 3 blade 12 in the same arrangement as in the prior art, 11a is a light shielding piece formed on the arm side of the trailing curtain # 2 blade 11, and 12a is on the arm side of the trailing curtain # 3 blade 12. It is a formed light shielding piece.

In a conventional rear curtain unit having four blades,
As shown in FIGS. 19 and 20, when viewed from the distance from the line connecting the rotation centers 101f and 101g at the base end of the arm and the centers of the swaging dowels 116a and 117a for the slit forming blade 110 at the end of the arm, the rear curtain # The centers of the caulking dowels 116b and 117b for the two blades 111 are the farthest (distance f), and hereinafter, the distance to the center of the caulking dowel for the rear curtain # 3 blade 112 and the distance to the center of the caulking dowel for the rear curtain # 4 blade 113. It is in order.

On the other hand, in a front curtain unit having a five-blade configuration,
Similarly, swaging dowels 10 for the rotation centers 101d and 101e at the base end of the arm and the slit forming blade 102 at the tip of the arm.
When viewed from the distance from the line connecting the centers of 8a and 109a, the caulking dowels 108c and 10c for the front curtain # 3 blade 104
The center of 9c is the farthest (distance g).
Distance to center of caulking dowel for two blades 103, first curtain # 4
The distance to the center of the caulking dowel for the blade 105 and the distance to the center of the front curtain # 5 for the caulking dowel for the blade 105 'are in this order.

As described above, in order to effectively reduce the lateral dimension of the shutter, a four-blade configuration is optimal for both the first and second curtains. In the present embodiment, the arrangement of the caulking dowel 18 is the same as that of the related art.
As shown by the two-dot chain line. In this case, the rear end portion 10b of the arm 10a of the slit forming edge 10a of the rear curtain slit forming blade 10 is a caulking dowel 18 for the rear curtain # 3 blade 12.
As shown by an arrow, the arm proximal end 10b is moved to the position of 10b 'by about 1.5 mm.
It must be moved to the blade tip side. In this case, the outermost movement locus of the arm base end 10b 'enters the shutter opening 1a as shown by H in the drawing, and it becomes impossible to form a slit as a shutter.

In order to avoid this, the tip of the trailing slit slit forming blade 10 is extended by about 1.5 mm so that the entire blade unit moves toward the base end of the arm (leftward in the drawing) with respect to the shutter opening 1a by about 1 mm. .5 mm. In addition to this, the arm-side light-shielding piece 11a of the rear curtain # 2 blade 11 is also provided with a caulking dowel 18 for the rear curtain # 3 blade 12.
Therefore, the light shielding piece 11a must be escaped. For example, as shown by hatching in FIG.
When a is deleted, a portion that cannot be shielded during the operation of the blade unit (a gap formed between the rear curtain slit forming blade 10 and the arm side light shielding piece 12a of the rear curtain # 3 blade 12) 19 as shown in FIG. Occurs, and the shutter function does not work. In this case, the horizontal dimension of the shutter is about 1.
It is not necessary to make the width larger than that of the first embodiment by 5 mm, and the lateral dimension can be reduced only slightly as compared with the shutter of the first conventional example.

On the other hand, in the first embodiment, the distance from the line connecting the center of rotation 1f, 1g at the base end of the arm and the center of the caulking dowels 16a, 17a connecting the trailing shutter slit forming blade 10 to the tip of the arm. Looking at it, the second curtain # 3 feather 12
The center of the caulking dowels 16c and 17c is the farthest (distance F), and the distance to the center of the caulking dowel for the trailing curtain # 2 blade 11 and the distance to the center of the caulking dowel for the trailing curtain # 4 blade 13 are determined in this order. is there.

By arranging the caulking dowels in this manner, the arm base end 10b of the slit forming edge 10a of the rear curtain slit forming blade 10 and the rear curtain # 3 blade 12
The outermost movement trajectory of the arm base end 10b does not enter the shutter opening 1a as shown by I in FIG. 3 without interference with the swaging dowel 17c. Further, the arm-side light-shielding piece 11a of the rear curtain # 2 blade 11 can form a sufficient arm-side light-shielding piece 11a without interfering with the caulking dowel 17c for the rear curtain # 3 blade 12, so that light shielding during operation can be ensured. I can do it.

As a result, the horizontal dimension of the shutter of the first embodiment can be reduced by 6 mm as compared with the shutter of the first conventional example.

Next, the dimensions of each part will be concretely examined. First, the dimension B of the width in the left-right direction of the left portion of the shutter opening 1a in the shutter base plate 1 is described with reference to FIGS.
In the first conventional example of No. 0, which is 19.2 mm, the size can be reduced to about 1 mm by reducing the diameter of the swaging dowel or reducing the allowance during and after traveling between the blades. However, if the size B is further reduced, the end of the slit forming edges of the slit forming blades 102 and 110 on the arm base end side enters the inside of the shutter opening 101a. Edge and shutter opening 1
Since a rectangular slit to be formed by 01a cannot be formed, the shutter function cannot be realized. For this reason, 2 mm
In order to reduce the size B, the configuration of the present invention is required. The dimension B is 14.2 mm in the shutter according to the first embodiment, which has a shape close to the optimum balance for miniaturization using the present invention.

To further reduce the size, in the first embodiment, the rotation shafts 1d, 1
The materials e, 1f, and 1g are changed from plastic formed integrally with the shutter base plate 1 to metal such as stainless steel, and the shaft diameter is reduced from 1.6 mm to 1.0 mm. Accordingly, the outer diameter of the base end of each arm of the front curtain and the rear curtain can be reduced by 0.3 mm, and the left end surface 11 of the shutter base plate 1 in FIGS. 1 and 2 can be shifted to the right accordingly. .

That is, the upper limit value of the dimension B can be obtained by 2 mm smaller than that of the first conventional example, and the lower limit value of the dimension B can be obtained by 0.3 mm smaller than that of the first embodiment. It can be expressed by such a relational expression.

{(14.2-0.3) /24.7} A ≦ B ≦ {(19.2-2) /24.7} A∴0.56A ≦ B ≦ 0.70A (1) In the shutter using the present invention, 1) The dimension B can be freely selected within the range of the dimension B shown by the equation.

Next, the dimension C of the width in the left-right direction of the right portion of the shutter opening 1a in the shutter base plate 1 will be described. In the first conventional example shown in FIGS. 19 and 20, 7.7 m is used.
Assuming that the minimum size at which the miniaturization can be felt at all is 0.3 mm, the upper limit dimension is 7.4 mm. Since the dimension C is almost determined by the tip trajectory of the slit forming blade,
As described above, as in the present invention, the arm length D
If the arm maximum operating angle θ is increased, the displacement of the blade group (especially, the slit forming blade) in the direction perpendicular to the running direction increases, which is disadvantageous for reducing the dimension C. However, in the shutter according to the first embodiment, which has a shape close to the optimum balance for downsizing using the present invention, the dimension C can be set to 6.7 mm.

When further miniaturization is required, the radius R of the leading edge of the slit forming edge of the slit forming blade is reduced to a necessary minimum (almost zero), and the slit forming edge is provided almost to the blade tip. For example, the length of the tip side of the slit forming blade can be further reduced by 0.7 mm. When the tips of the blades other than the slit forming blades are similarly cut down by about 0.7 mm, the lower limit of the dimension C is 6.0 mm.
Becomes If it is smaller than this, the slit forming edge enters the inside of the shutter opening 1a, and the function of the shutter cannot be realized.

Further, when the blades are deployed, the front end portion of each blade and the shutter opening 1a in the shutter base plate 1 or the cover plate.
It is not possible to secure even the minimum amount required for securing the light-shielding property and preventing the blades from coming off due to careless pressing by the photographer.

Therefore, the dimension C is expressed by the following relational expression.

(6.0 / 24.7) A ≦ C ≦ (7.4 / 24.7) A∴0.24A ≦ C ≦ 0.30A (2) In the shutter using the present invention, the dimension represented by the above formula (2) The dimension C can be freely selected within the range of C.

Next, the arm length dimension D will be described.
Here, FIG. 5 schematically shows the balance between the arms 6 and 7 of the front curtain and the slit forming blades 2 with respect to the dimensions of the shutter base plate 1, and the inclination of the slit forming blades 2 in the running completed state. In this figure, 2 'indicated by a two-dot chain line indicates a state in which the slit forming blade 2 has moved to the most distal end side, and 2 "indicates a state in which the slit forming blade 2 has moved to the travel preparation completion position. Since it is the same as the first curtain, it is omitted.

In the first conventional example shown in FIGS. 19 and 20,
The dimension D is 23.0 mm, and when the present invention is used to reduce the above-mentioned dimension B by 2 mm from 19.2 mm of the first conventional example, the dimension D becomes 22.2 mm from FIG. In the shutter according to the first embodiment, which has a shape close to the optimum balance for miniaturization using the present invention, the dimension D
Is 19.8 mm.

When further miniaturization is required, the dimension D
Can be further reduced by 0.5 mm to 19.3 mm. This is to increase the maximum operating angle θ of the arm, reduce the shape of the first and second arms that would otherwise interfere, increase the amount of escape, and reduce the diameter of the caulking dowel,
In addition, it becomes possible by relaxing the constraint condition of each blade shape such as the light shielding piece near the arm and reducing the amount of overlap between adjacent blades when the blades are deployed.

FIG. 6 shows the balance between the arm of the front curtain and the slit forming blade and the inclination of the slit forming blade 2 in the running completed state with respect to the size of the shutter base plate 1 when the dimension D is 19.3 mm. This is schematically shown. In this figure, 2 'indicated by a two-dot chain line indicates a state in which the slit forming blade has moved to the most distal end side, and 2 "indicates a state in which the slit forming blade 2 has moved to the travel preparation completion position.
The second curtain is the same as the first curtain, and is omitted.

When the dimension D is smaller than the value shown in FIG. 6, it becomes difficult to support each blade in terms of space. In addition, when the arm shape is further narrowed or the diameter of the caulking dowel is reduced, the arm strength and the like are reduced. Blade caulking strength is too low. Further, the light blocking is incomplete, and the function as the shutter is not achieved.

Therefore, the dimension D can be represented by the following relational expression.

(19.3 / 24.7) A ≦ D ≦ (22.2 / 24.7) A∴0.78A ≦ D ≦ 0.90A (3) In the shutter using the present invention, the dimension represented by the above equation (3) The dimension D can be freely selected within the range of D.

Next, the arm maximum operation angle θ will be described. In the first conventional example shown in FIGS. 19 and 20, the arm operating angle from the traveling completed state to the traveling preparation completed state is 74 °.
If the overcharge is up to 4 ° (up to 75 °, the overcharge fluctuates between 0 ° to 4 ° due to the adjustment roller of a charging mechanism (not shown) depending on each shutter), the total arm operating angle is 79 °. .

The dimensions B17.2 mm and D22.
When the present invention is used corresponding to 2 mm, the lower limit of the arm maximum operating angle θ is 80 ° + (overcharge 0 ° to 4 °) as shown in FIG. In the shutter according to the first embodiment, which has a shape close to the optimum balance for miniaturization using the present invention, θ is 87 ° + (overcharge 0 ° to
4 °).

When further miniaturization is required, as shown in FIG. 6, θ is 90 corresponding to the above-mentioned dimension D of 19.3 mm.
° + (overcharge 0 ° to 4 °).

Therefore, θ is represented by the following relational expression.

80 ° ≦ θ ≦ 94 ° (4) In the shutter using the present invention, the value of θ can be freely selected within the range of θ in the above equation (4).

By increasing θ in this manner, the drive pins 20a of the front-curtain drive lever 20 and rear-curtain drive lever 21 for applying running energy by spring force or the like to each of the front-curtain unit and the rear-curtain unit. , 21a and the arms 6, 14 are limited in the coupling position (6a, 14a). That is, since the front curtain and rear curtain drive levers 20 and 21 rotate coaxially with the rotation centers 1d and 1f of the first arms 6 and 14, the larger the turning radius of the drive pins 20a and 21a, the larger the θ becomes. The area occupied by the operation trajectory of the drive pin is widened, and the degree of freedom in arranging the blades is reduced, which is disadvantageous for downsizing. Therefore, it is required to minimize the turning radius of the drive pin.

In addition, the position of each drive pin (20a in FIG. 2, 21a in FIG. 1) in the overcharged state after the completion of running of the front curtain or the completion of charging of the rear curtain is made as close as possible to the left end of the shutter base plate 1. Is preferred. Also, in recent cameras, a method of winding a film using a friction force with a rubber-wrapped spool without using a sprocket for a film feeding mechanism has been adopted,
The index of the film screen has been changed from a sprocket rotation detection to a photo sensor. For this reason, in the first conventional shutter mounted on a camera using a sprocket, the left end of the shutter base plate is moved from a certain area in accordance with the shape of the sprocket existing on the left side of the shutter across the wall of the camera body. Are provided above and below (101i, 1 in FIGS. 19 and 20).
01j) focuses on the fact that in the shutter of the first embodiment mounted on a camera using a rubber wound spool, there is no need to provide a relief for the sprocket, and the drive pin 20
1 and 21a, the driving pin positions (20a in FIG. 2, 2 in FIG.
1a) is brought close to the left end of the shutter base plate 1 so as to reach just below the rotation center 1d of the first arm 6 on the front curtain side and just above the rotation center 1f of the first arm 14 on the rear curtain side.

As described above, in the shutter according to the first embodiment, the drive pin 20 is effective for reducing the size of the shutter.
The turning radii of the a and 21a are made as small as possible until they become smaller than the turning radii of the caulking dowels 8d and 16d for the # 4 blade located on the most proximal side on the first arms 6 and 14 (in other words, the driving pin In addition to the movable area being located closer to the base end side (rotation axis) of the first arm than the movable area of each caulking dowel on the first arms 6 and 14), the leading blade overlap state shown in FIG. In the position where the arm base end 2b of the slit forming edge 2a of the front curtain slit forming blade 2 does not interfere with the drive pin 20a in the movable area of the drive pin 20a of the front curtain drive lever 20 ( 1 to efficiently use the space by entering the position where the drive pin 20a has passed during the preceding curtain overlapping operation.
The trailing-curtain slit forming blade 10 in the state shown in FIG.
Of the slit forming edge 10a at the base end side of the arm 10
b enters a position in the movable region of the drive pin 21a of the rear curtain drive lever 21 that does not interfere with the drive pin 21a (a position through which the drive pin 21a passes at the time of the subsequent rear curtain unfolding operation) and space. By effectively utilizing, the miniaturization in the direction (lateral direction) perpendicular to the blade traveling direction is achieved.

Next, the dimension E between the first and second arms will be described. In the first conventional example shown in FIGS. 19 and 20, the parallelism of the slit forming edge (linear portion) at this time is determined by the inclination angle of the slit forming edge and the blade running direction at both ends of the slit forming edge (see FIG. In the vertical direction). The condition is that the rotation axis (10
1d, 101e, etc.), and there is no hole H in the swaging dowel connecting the slit forming blade to the arm.
Class 8-Shaft f8 class, with a maximum play of 34 μm for a diameter φ1.5 mm. FIG. 9 schematically illustrates the balance between the front curtain arms 106 and 107 and the front curtain slit forming blade 102 with respect to the size of the shutter base plate 101, and the inclination of the slit forming edge of the front curtain slit forming blade 102 in the traveling completed state. And the parallelism of the slit forming edge in the running completed state. Since the rear curtain is the same as the front curtain, it is omitted.

As can be seen from FIG. 9, the inclination angle of the slit forming edge is 0 ° 18′18 ″, and the difference in the blade running direction distance between both ends of the slit forming edge is 0.22 mm.

The dimension B 17.20 mm and the dimension D2 described above.
Using the present invention in accordance with 2.2 mm and the lower limit value 80 ° of the arm maximum operating angle θ, the inclination angle of the slit forming edge and the difference in the blade running direction distance between both ends of the slit forming edge are the same under the same backlash conditions as in the above conventional example. In order to maintain above the level, the dimension E is 8.25 mm as shown in FIG.

The size E of the shutter according to the first embodiment, which is reduced in size by using the present invention and is close to the optimum balance, is 8.46 mm. FIG. 7 schematically shows the balance between the front curtain arms 6 and 7 and the slit forming blade 2 with respect to the size of the shutter base plate 1 and the inclination of the slit forming edge 2a in the running completed state in the shutter of the first embodiment. (Note that the rear curtain is omitted because it is the same as the front curtain.) As can be seen from this figure, the inclination angle of the slit forming edge is 0 ° 1 under the same backlash conditions as in the above conventional example.
8'0 ", the difference in the blade running direction distance between both ends of the slit forming edge is 0.22 mm, which is slightly improved as compared with the conventional one.

In the first embodiment, if the dimension E is kept at 8.06 mm as in the prior art, as shown in FIG. 8 (dimensions other than the dimension E are the same as in FIG. 7), the same play condition as in the above-mentioned conventional example is employed. And the inclination angle of the slit forming edge is 0 ° 21 ′.
0 ", the difference in the blade running direction distance between both ends of the slit forming edge is 0.26 mm, and the parallelism of the slit forming edge is worse than that of the conventional one. This means that the exposure unevenness of the exposure screen is worse. After all, it can be seen that it is appropriate to increase the dimension E to 8.46 mm in order to improve the performance of the downsized shutter according to the first embodiment over the conventional one.

In the case where further miniaturization is required, the present invention is used and the rotation shafts 1d and 1e at the base end of the arm correspond to the dimension D19.3 mm and the upper limit value 94 ° of the arm maximum operating angle θ. , 1f, and 1g are changed from plastic molded integrally with the shutter base plate 1 to metal such as stainless steel, and the shaft diameter is changed from 1.6 mm to 1.0 mm.
To be smaller. Accordingly, the outer diameter of the base end of each arm of the front curtain and the rear curtain is reduced by 0.3 mm, and the front curtain and the rear curtain of FIG. In addition, the portion 1k adjacent to the camera's viewfinder eye path
If it is allowed to increase the vertical dimension of the shutter of the first conventional example without enlargement, the first arm 6, 14 can be moved 0.8 mm in both the leading and trailing curtains in the vertical direction. it can. Therefore, when these are combined, the dimension E is 9.56 mm.

Further, as shown in FIG. 6, the inclination angle of the slit forming edge is 0 ° 16 ′ under the same backlash conditions as in the conventional example.
59 ", the difference in the blade running direction distance between both ends of the slit forming edge was 0.21 mm, which is an improvement over the conventional one.

When the dimension E is made larger than this,
It is not preferable because it affects the viewfinder optical path of the camera and the vertical dimension of the shutter becomes large.

Accordingly, the dimension E can be expressed by the following relational expression.

(8.25 / 24.7) A ≦ E ≦ (9.56 / 24.7) A∴0.33A ≦ E ≦ 0.39A (5) In the shutter according to the present invention, the dimension E represented by the above equation (5) is obtained. The dimension E can be freely selected within the range of.

In the above description, the left-right width B of the shutter base plate 1, the right-left width C of the right side of the shutter base plate 1, the arm length D, the maximum operating angle θ of the arm, It has been described that the dimension E between the first and second arms can be independently selected within the range of the expressions (1) to (5). However, as shown in FIGS. There is a suitable (balanced) combination between them. The main factors for miniaturization are dimensions D and θ,
Adjustment of interference avoidance of a swaging dowel or the like and maintenance of the parallelism of the slit forming blades are performed with the dimension E, and furthermore, adjustment of interference avoidance of the swaging dowel or the like and maintenance of light-shielding properties such as maintenance of overlapping blades are performed by devising the arrangement of the swaging dowels. The dimensions B and C are D,
The dimensions are derived by θ and E.

In the first embodiment, the drive levers 20, 21 and the arms 6,
The movable region of the engaging portion with the slit 14 is defined by the slit forming blades 2, 1.
0, the slit forming edges 2a, 10a are used as movable areas of the arm base end portions 2b, 10b with a time difference therebetween, so that the slit forming edges 2a, 10a are effective for miniaturization in a direction orthogonal to the blade running direction. The extension amount of the arm base end portions 2b and 10b of the arm 10a can be increased. With this, it is possible to shorten the arm length with a short arm type with a large arm rotation angle,
The interference avoidance adjustment of the caulking dowel connecting the blades to the arm and the light-shielding property such as the maintenance of the amount of overlapping blades are performed, and the link interval between the arms is increased to prevent the parallelism of the exposure slit from deteriorating. Moreover, without complicating the structure of the front and rear curtain units, the operating resistance and inertia are reduced, and the shutter is reduced in size suitable for high-speed operation, particularly in the direction perpendicular to the blade running direction. be able to.

If the advantage that the inertia of the front and rear curtain units is small is not used for improving the curtain speed and the same curtain speed is used, the required shutter charge energy is reduced and the charging mechanism is simplified. The camera becomes thinner and the camera can be made smaller. Further, it is convenient to increase the frame speed during continuous shooting by the camera.

(Second Embodiment) FIGS. 10 to 18 show an image display device provided with a shutter device according to a second embodiment of the present invention. This image display device is suitable for a photo stand, an electronic album, etc., and has a spatial light modulation element (Spatial Light
Modulator: hereinafter referred to as an SLM), which is optically projected and stored, and is displayed in an inverted manner so that a negative film used by a general user can be viewed.
More specifically, the image display device of the present embodiment is an SLM
Is a ferroelectric liquid crystal having memory properties (hereinafter referred to as F
LC), a negative image is instantaneously written to the SLM using a flash used in a camera or the like, and the image is read and observed with light.

FIG. 10 shows an image display device 3 according to this embodiment.
21 shows a usage image. By loading the developed IX240 film (hereinafter, referred to as a D-cart) 322 as a negative film into the image display device 321, the photographed image on the film is negative-positive inverted and displayed as a high-definition image.

FIG. 11 shows the internal configuration of the image display device 321. In this figure, 323 is D cart 3
22 is a developed negative film on which a photographed image is drawn. The negative film 323 is configured to be indexed frame by frame by a film feeding mechanism (not shown) at a position shown in the drawing (a writing position facing an aperture (not shown)).

Numeral 324 denotes a milky white diffusing plate for uniformly diffusing light emitted from a strobe device 325 described later.
The frame set at the writing position in the negative film 323 is illuminated.

Reference numeral 325 denotes a strobe device similar to that used in cameras and the like, which comprises a Xe tube, a reflector, a light emitting circuit and the like. This strobe device emits light in response to a trigger signal from a microprocessor (not shown).

Reference numeral 326 denotes an orange base removal filter which serves to remove the orange base color from the negative image, and is constituted by an optical filter which has a blue color which is a complementary color of orange.

Reference numeral 327 denotes a projection lens which reflects the negative image on the negative film 323 at a predetermined magnification to a reflection mirror 328.
Is projected on the photoelectric conversion layer of the SLM 329 via the.

Reference numeral 329 denotes an SLM, the structure of which will be described in detail with reference to FIG. 12A shows the state of the SLM 329 at the time of writing an image, and FIG. 12B shows the state of the SLM 329 at the time of image observation.

In FIG. 12, reference numeral 329a denotes a pure color or complementary color filter. This color filter 32
9a is an image pickup device C used for a video camera or the like.
A fine-grained object used in a CD can be observed without deteriorating the silver halide image, which is desirable for the present image display device.

Numerals 329b and 329h denote polarizing plates with a liquid crystal layer to be described later interposed therebetween. In the configuration shown in FIG. 12, 329b has a polarization direction opposite to the paper surface, and 329h has a right-left direction relative to the paper surface. It has a cross Nicol configuration.

Reference numerals 329c and 329f denote transparent conductive films (hereinafter referred to as ITO films) made of indium oxide or the like, which are supplied with electricity from an AC power supply 330 and a circuit (not shown) for driving the same via the SW 331. Thereby, potentials of different polarities are generated in the respective ITO films 329c and 329f.

Reference numeral 329d denotes a photo capacitor layer, which is formed of a photodiode layer of an amorphous film or an OPC (organic semiconductor film). One side of the photo-con layer 329d is in close contact with the ITO film 329c, and the other side is in close contact with the FLC 329e described later.

Reference numeral 329e denotes an FLC which is a liquid crystal layer. One surface of the FLC is in close contact with the photocon layer 329d as described above, and the other surface is in close contact with the above-described ITO film 329f.

Reference numeral 329 g denotes glass, which serves to seal the liquid crystal layer and protect other layers at the same time.

Reference numeral 329j denotes a negative film image drawn for explanation of a projection image (virtual image) from the negative film 323 projected by the above-described projection lens 327.

In FIG. 11, reference numeral 332 denotes a straight tube-type readout illumination light source often used for a flat display or the like, and reference numeral 300 denotes a shutter device disposed in front (outside) of the SLM 329.

FIGS. 13 and 14 show the structure of the shutter device 300. FIG. FIG. 13 shows a state in which the shutter is closed and the screen of the SLM 329 is shielded from external light. FIG. 14 shows a state in which the shutter is opened and an image displayed on the screen of the SLM 329 can be viewed.

In these figures, reference numeral 301 denotes a shutter base plate (substrate), and reference numeral 301a denotes a shutter opening formed substantially at the center of the shutter base plate 1. 301b is formed on the left side of the shutter opening 301a in the shutter base plate 301 (one of the two sides of the shutter opening in the substrate), and is provided with a drive pin 320a of a drive lever 320 for driving the blade unit. The drive lever 32 is an arc-shaped long hole for escaping the movement locus.
Reference numeral 0 denotes a motor 3 which is rotatable around a rotation shaft (not shown) formed coaxially with the shaft 301d.
The motive power generated in 33 is transmitted through a gear train 334 (shown by a two-dot chain line in FIG. 11), thereby being driven to rotate.

Reference numeral 302 denotes a first blade (light-shielding blade).
a is the longitudinal direction (left-right direction) of the first blade 302
The light-shielding edge extends to Reference numeral 302b denotes a light-shielding edge formed by extending the light-shielding edge 302a to the left (“the end on one side of the light-shielding blade” in the claims). Reference numerals 303 to 305 denote covering blades (light-shielding blades).
03 is the second blade, 304 is the third blade, 305 is the fourth blade
The wings.

Reference numeral 306 denotes a first arm whose base end 306
b is rotatably attached around a shaft 301d formed on the shutter base plate 301. Also, the first arm 3
The left end of the first blade 302 is rotatably connected to a tip end of the first blade 302 using a caulking dowel 308a.

Reference numeral 306a denotes a hole formed on the first arm 306 for penetratingly engaging the drive pin 320a of the drive lever 320 in the drive direction without play.
The driving force is transmitted from the driving lever 320 by engaging the 20a with the hole 306a, and the first arm 306 is driven to rotate.

Reference numeral 307 denotes a second arm whose base end 307
b is rotatably attached around a shaft 301e formed on the shutter base plate 301. The left end of the first blade 302 is rotatably connected to the distal end of the second arm 307 using a caulking dowel 309a.
Thus, the first blade 302 and the first and second arms 306 and 307 form a parallel link.

Similarly, the covering blades 303, 304, 305
Are provided at the intermediate portions of the first arm 306 and the second arm 307, respectively.
09b, 308c, 309c, 308d, 309d are rotatably connected to form parallel links. As described above, the blade unit 340 of the shutter device 300 is configured.

[0149] As shown in FIG.
In the state where the screen of the SLM 329 is opened, the first
The light-shielding edge portion 302 b of the blade 302 is
a is located within the movable region. Then, when the developing operation for closing the shutter opening of the blade unit is started, the light-shielding edge portion 302b moves out of the movable region of the drive pin 320a, and therefore does not interfere with the drive pin 320a.

FIG. 15 shows an electric circuit configuration of the image display device 321. In this figure, reference numeral 335 denotes a control circuit that controls the entire sequence of the image display device 321, and 336 denotes a motor control circuit that controls the forward and reverse rotation of a motor 333 that is a drive source of the shutter device 300. Reference numeral 337 denotes a light emitting circuit that controls light emission of the strobe device 325, and reference numeral 338 denotes an SLM control circuit that controls a SW 331 for switching ON / OFF of energization to the SLM 329. 339a is a light-shielding state detection switch that is turned on when the blade unit 340 of the shutter device 300 completely closes the shutter opening 301a, and 339b is when the blade unit 340 completely opens the shutter opening 301a (light-blocking release). This is a light-shield release state detection switch that is turned on.

In FIG. 11, reference numeral 341 denotes the blade unit 3
40 is a diffusion sheet interlocked with the blade unit 340.
Is moved from the closed state to the open state, the sheet drive mechanism (not shown) moves from a state in which the back surface of the SLM 329 is not covered to a state in which it is covered. The diffusion sheet 341 is S
Read out the illumination light source 3 while covering the rear side of the LM 329
When the light 32 is turned on, the illumination light is diffused by the diffusion sheet 341 and substantially uniformly strikes the SLM 329. Then, when the blade unit 340 is closed,
It is driven to retract from the back side of the SLM 329.

Next, the operation of the image display device 321 (mainly the control circuit 335) will be described with reference to the flowchart of FIG. Note that this flowchart is for the image display device 3
The process starts when the D cart 322 is loaded in the blade 21, and the blade unit 340 at this time is in a closed state, that is, a state in which the user cannot observe the image of the SLM 329.

When the user loads the D cart 322 into the image display device 321 (S101), the control circuit 335
The film feeding mechanism is operated to perform a thrust operation of feeding out the negative film 323 in the D cart 322, and the first film is positioned at the writing position in the image display device 321 and stopped (S102). In this state, a standby mode state of waiting for reception of a signal from each switch (not shown) is established (S103).

If a signal from the remote controller or the like that advances the screen to a certain frame is input (S104),
The designated frame is moved to the writing position in the image display device 321 by operating the film feeding mechanism (S10).
5) Stand by in a command waiting state as to whether or not to display the image of this frame (S106).

When a display command from the user is received in this standby state (S107), the control circuit 3
35 detects the state of the light-shielding state detection switch 339a (S108). Here, the previously displayed frame image is deleted from the SLM 329 and the new image is displayed in the SLM 3.
In order to perform writing to 29 in such a manner that the blade unit 340 completely blocks external light from entering the image display device 321, it is confirmed whether or not the blade unit 340 is set to the closed state.

When the light-shielding state detection switch 339a is ON, the flow proceeds to S109, and when it is OFF, the flow proceeds to a blade unit setting subroutine. The blade unit setting subroutine will be described later.

In S109, the control circuit 335 first turns on the SW 331 to erase the previously displayed frame image from the SLM 329 (S109), and then turns on the reading illumination light source 332 (S110). , AC
An electric field is applied from the power supply 330 on the side opposite to that during image writing (S111).

As a result, the FLC 329e is turned into a neutral state by inverting all the cells to the horizontal state partially shown in FIG. 12 (S112). After performing the reset operation for a sufficient time for all the cells to be in the above state, the SW 331 is turned off (S113), and the readout illumination light source 332 is turned off (S114).

From here, the flow of the writing operation of a new image is performed. The image display device 321 is placed, for example, on a shelf provided on an office desk, a home wall, or the like, and is used in external light having a brightness of about several hundred lux. These external lights are transmitted by one polarizing plate 329h and the liquid crystal layer 329.
e, the photocon layer 329 is almost halved.
d, but when the SW 331 is OFF, the ITO
No electric field is applied between the films 329c and 329f, and FLC3
29e does not react.

For this reason, the control circuit 335 controls the SW 331
Is turned on to turn on the power (S115), and a forward electric field required for writing an image is applied from the AC power supply 330 to the ITO films 329c and 329f (S116). And
The strobe device 325 is caused to emit light (S117), and the image of the negative film 323 is converted to the SLM3 by the strobe light.
29, and writes an image on the SLM 329.

The flash emission performed in S117 is approximately 500 μsec. Since the light emission is completed at about the same time, the turning on of the SW 331 performed in S116 is performed at the same timing as the timing, and the electric field is cut by turning off the SW 331 immediately after the light emission ends (S11).
8).

Thereafter, to open the blade unit 340 so that the user can observe the image stored in the SLM 329, the process proceeds to the blade unit open subroutine (S119). The blade unit open subroutine will be described later.

When the blade unit 340 is opened,
The read illumination light source 332 is turned on, so that the user can visually recognize an image written in the SLM 329 in a transmission illumination manner (S120). Thereafter, the control circuit 321 enters a standby state for receiving the next command (S103).

Next, the blade unit setting subroutine will be described with reference to FIG. To bring the blade unit 340 into the closed state, the control circuit 335 firstly sets the motor 3
33 is rotated forward (S130). The forward rotation of the motor 333 is transmitted to the first arm 306 shown in FIG.
Reference numeral 06 is driven to rotate around the shaft 301d in the counterclockwise direction in FIG. Accordingly, blade unit 340 travels from the open state (blade superposed state) in FIG. 14 to the closed state (blade unfolded state) in FIG. In conjunction with the closing operation of the blade unit 340, the seat driving mechanism
The diffusion sheet 341 is retracted from the position covering the SLM 329 so that an image can be written on the SLM 329. Further, at substantially the same timing as when the blade unit 340 enters the closed state, the light shielding state detection switch 339a switches from OFF to ON. Therefore, the control circuit 33
5 detects that the blade unit 340 has completely closed the shutter opening 301a of the image display device 321 (S131), and outputs a signal to stop the rotation of the motor to the motor control circuit 336. Stops (S132). Here, this subroutine ends.

Next, the blade unit open subroutine will be described with reference to FIG. In order to open the blade unit 340, the control circuit 335 first rotates the motor 333 in the reverse direction (S140). The reverse rotation of the motor 333 is transmitted to the first arm 306 shown in FIG. 13 via the gear train 334 and the driving lever 320, and the first arm 306 is rotated around the shaft 301d in the clockwise direction in FIG. You. This causes the blade unit 340 to travel from the closed state (blade deployed state) in FIG. 13 to the open state (blade superposed state) shown in FIG. Then, in conjunction with the opening operation of the blade unit 340, the sheet driving mechanism drives the diffusion sheet 341 to a position covering the SLM 329, and the illumination light from the reading illumination light source 332 emits the illumination light from the SLM 32.
It is possible to view a clear image without unevenness in a state where 9 is uniformly illuminated. At approximately the same timing as when the blade unit 340 enters the open state (light-shield release state), the light-shield release state detection switch 339b changes from OFF to O
Switch to N. Therefore, the control circuit 335 determines that the blade unit 340 has the shutter opening 301 of the image display device 321.
Since it is detected that a has been completely opened (S141),
A signal for stopping the rotation of the motor is output to the motor control circuit 336, whereby the rotation of the motor 333 is stopped (S142). Here, this subroutine ends.

As described above, in the image display device of the present embodiment, the blade unit 340 is closed at the time of writing an image to block external light from entering the SLM 329, thereby reducing
Image noise due to the influence of external light, which has occurred in a conventional image display device in which an image is written while the LM 329 is exposed to external light, can be eliminated. Therefore, a device which had to project a film image with a large amount of writing light from the strobe device 325 to obtain a clear image in the past becomes unnecessary. As a result, the strobe device 3
25 can be reduced in size, and the entire image display device 321 can be reduced in size.

Also, the FNO. Does not need to be brightened, the outer diameter of the lens of the projection optical system can be designed to be compact, and the image display device 321 can be made more compact. Further, the image writing time can be significantly reduced.

Here, the shutter device 300 of the present embodiment is described.
Is mounted on an image display device 321 for observing a display image of the SLM 329 having a predetermined screen size (for example, 75 mm in height and 111 mm in width). For example, the vertical dimension A of the shutter opening 301a is 74.1 mm, The lateral dimension is set to 109.8 mm. This shutter device 30
In order to reduce the size of 0, it is necessary to reduce the size of components around the shutter opening 301a.

In FIGS. 13 and 14, the width in the left-right direction of the left portion of the shutter opening 301a in the shutter base plate 301 (the dimension from the left end surface of the shutter opening 301a to the left end surface of the shutter base plate 301) is B.
Let C be the width in the left-right direction of the shutter base plate 301 to the right of the shutter opening 301a (the dimension from the right end surface of the shutter opening 301a to the right end surface of the shutter base plate 301). The dimension from the center of the rotation shafts 301d and 301e at the base end of the arm to the center of the caulking dowels 309a and 309b connecting the first blade 302 to the tip of the arm is D, and around the rotation shafts 301d and 301e of the arms 306 and 307. Is the maximum operating angle of θ, and the dimension between the first arm 306 and the second arm 307 forming the parallel link (the rotation axis 3
With E as the dimension between 01d and 301e), points of interest for downsizing the shutter device 300 will be described.

The outer shape of the shutter device shown by a two-dot chain line in FIGS. 13 and 14 is a case where a conventional blade unit is used. In conclusion, since the shutter device 300 of the present embodiment employs the same configuration as that described in the first embodiment, the horizontal (left-right direction) dimension of the shutter device 300 is 18 mm larger than that of the related art. Become smaller.

In this embodiment, the blade unit 340 is
As in the first embodiment, the swaging dowels and the like are arranged alternately in the blade overlapping state, so that the rotation angle of the arm can be greatly increased. Also, in the blade superimposed state, the swaging dowels 308c, 309c, 308d, 309d of the two blades (third blade, fourth blade) 304, 305 arranged on the side near the base end of the arm are the left end of the outer shape of the shutter base plate. 301l and left end 301
1 can be arranged along the
8d left and right distance and caulking dowels 309c, 30
The horizontal distance between 9d is 1.32 mm. Further, when the angle of the overcharge is considered at a maximum of 4 °, these lateral distances in the blade superposed state are almost 0 (zero) mm.
Can be Therefore, the shutter device 300 is
The size can be significantly reduced in a direction (lateral direction) perpendicular to the blade traveling direction.

Then, the point of interest (including the arrangement of the caulking dowel), the dimensions CE and the arm maximum operating angle θ
Is the same as that described in the first embodiment, and the relational expressions (1) to (5) derived in the first embodiment also hold in the shutter device 300 of the present embodiment.

Also in the shutter device 300 of the present embodiment, as in the first embodiment, there is a combination (with a good balance) between the respective dimensions, and the main reason for the miniaturization is the dimension D. Dimension and angle θ. Then, the interference avoidance adjustment of the caulking dowel and the maintenance of the parallelism of the first blade 302 are performed with the dimension E, and the interference avoidance adjustment of the caulking dowel and the securing of the light shielding property such as the maintenance of the overlapping amount of the blades are performed by devising the arrangement of the caulking dowel. The dimensions B and C are dimensions derived from D, θ, and E.

Then, the shutter device 300 of this embodiment
Then, the movable region of the engaging portion between the drive lever 320 and the arm 306 is set to the first blade 302
By sharing the movable area of the light-shielding edge portion 302b with a time difference as described above, it is possible to increase the extension amount of the light-shielding edge portion 302b that is effective for downsizing in the direction perpendicular to the blade traveling direction. As a result, with a short arm type with a large arm rotation angle, the arm length can be made shorter, and interference avoidance adjustment of the swaging dowel connecting the blade to the arm and light shielding performance such as maintaining the overlapping amount of the blades are performed. Further, it is possible to prevent the parallelism of the blade unit 340 from being deteriorated by increasing the link interval between the arms. Moreover, without complicating the structure of the blade unit 340, the operating resistance and the inertia are reduced, and the shutter device 300 is reduced in size suitable for high-speed operation, particularly in the direction perpendicular to the blade traveling direction. Can be.

If the advantage that the inertia of the blade unit 340 is small is not used to improve the driving speed of the blade unit 340 and the driving speed is kept the same as the conventional one, the necessary shutter driving energy is reduced.
The drive mechanisms such as the gear train 3 and the gear train 334 can be simplified and thinned, and the image display device 321 can be downsized.

In each of the above embodiments, the shutter device for moving the light-shielding blade group on each of the front curtain side and the rear curtain side or the shutter device for moving the set of light-shielding blade groups has been described. A shutter device that moves one light-shielding blade on each of the curtain side and the rear curtain side,
The present invention can also be applied to a shutter device that moves a plurality of light shielding blades.

In each of the above embodiments, the shutter device for a camera or the shutter device for an image display device has been described. However, the shutter device of the present invention can be used for various devices other than the camera and the image display device. .

[0178]

As described above, the first to fourth embodiments of the present invention are described.
According to the invention of the above, in a so-called short arm type shutter device, a space serving as a movable region of the engagement portion is provided so that operation interference does not occur in a blade unit including a light shielding blade, an arm member, and a driving member. Since the light-shielding blade is commonly used as a movable space at the end of the arm proximal end with a time lag, the arm proximal end of the light-shielding blade can be sufficiently extended to the one side. Thus, without complicating the structure of the blade unit, the size of the shutter device can be reduced, and in particular, a direction extending to the side where the base end portion of the arm member is disposed and the opposite side (for example, a direction perpendicular to the blade traveling direction). The size of the shutter device can be reduced, interference does not occur in the blade unit, light-shielding properties can be ensured, and operation resistance and inertia can be reduced to realize a shutter device suitable for high-speed operation.

In the shutter device having the front curtain light shielding blade and the rear curtain light shielding blade, before the traveling of the front curtain light shielding blade, the end of the one side of the front curtain light shielding blade is moved.
Movable areas of both the front curtain side engaging portion (the engaging portion between the front curtain driving member and the front curtain arm member) and the rear curtain side engaging portion (the engaging portion between the rear curtain driving member and the rear curtain arm member) If it is located outside, the rear curtain will not be held at the position before the start of travel due to a failure that occurred on the rear curtain side, and even if only the rear curtain has run, the rear curtain will be On the other hand, the end on the one side of the front curtain light shielding blade can be prevented from interfering. Further, in the traveling completed state of the rear curtain light shielding blade, the one end of the rear curtain light shielding blade is positioned outside the movable area of both the rear curtain side engaging portion and the front curtain side engaging portion. In the case where the front curtain is driven to charge ahead of the rear curtain by the shutter charge after the traveling is completed, the one end of the rear curtain light shielding blade interferes with the front curtain side engaging portion. Can not be.

[Brief description of the drawings]

FIG. 1 is a front view when a blade group of a focal plane shutter according to a first embodiment of the present invention is in a traveling ready state.

FIG. 2 is a front view when the blade group of the focal plane shutter is in a traveling completed state.

FIG. 3 is an explanatory diagram of an effect obtained by a blade swaging position on an arm in the focal plane shutter.

FIG. 4 is an explanatory diagram of an effect obtained by a blade swaging position on an arm in the focal plane shutter.

FIG. 5 is an example of a focal plane shutter using the configuration of the first embodiment, and is a traveling completed state schematically showing the balance between the front curtain arm and the slit forming blade and the inclination of the slit forming portion with respect to the shutter base plate size. FIG.

FIG. 6 is another example of the focal plane shutter using the configuration of the first embodiment, and schematically shows the balance between the front curtain arm and the slit forming blade and the inclination of the slit forming portion with respect to the shutter base plate size. The front view of a completion state.

7 is a front view of the focal plane shutter according to the first embodiment in a traveling completed state schematically showing the balance between the front curtain arm and the slit forming blade and the inclination of the slit forming portion with respect to the shutter. FIG.

FIG. 8 is a diagram when only a dimension E is different in FIG. 7;

FIG. 9 is a front view of a conventional focal plane shutter (first conventional example) in a traveling completed state schematically showing a balance between a front curtain arm and a slit forming blade and a tilt of a slit forming portion with respect to a shutter base plate dimension. .

FIG. 10 is a view showing a use image of an image display device using a shutter device according to a second embodiment of the present invention.

FIG. 11 is an internal configuration diagram of the image display device.

FIG. 12 is a diagram showing the configuration and operation of an SLM used in the image display device.

FIG. 13 is a front view of the shutter device of the second embodiment in a closed state.

FIG. 14 is a front view of the shutter device of the second embodiment in an open state.

FIG. 15 is an electric circuit block diagram of the image display device.

FIG. 16 is an operation flowchart of the image display device.

FIG. 17 is an operation flowchart of the image display device.

FIG. 18 is an operation flowchart of the image display device.

FIG. 19 is a front view showing a state in which traveling preparation of a conventional focal plane shutter (first conventional example) is completed.

FIG. 20 is a front view showing a traveling completion state of a conventional focal plane shutter (first conventional example).

FIG. 21 is an explanatory view showing interference between a rear curtain slit forming blade and a drive pin in a conventional focal plane shutter.

FIG. 22 is an explanatory view showing interference between a front curtain slit forming blade and a drive pin in a conventional focal plane shutter.

[Explanation of symbols]

1, 301: shutter base plate 1a, 301a: shutter opening 11l, 301l: side end of shutter base plate 2: front curtain slit forming blade 2a: front curtain slit forming edge 2b: arm base end of (first curtain slit forming edge 2a) Side end portions 3, 4, 5 ... front curtain covering blades 6 ... first curtain first arm 7 ... second curtain second arm 8a, 8b, 8c, 8d, 9a, 9b, 9c, 9d ...
(For the first curtain) Swaging dowels 16a, 16b, 16c, 16d, 17a, 17b, 1
7c, 17d ······························································································································································································· Part 14: Rear curtain first arm 15 ... Rear curtain second arm 6b, 7b, 14b, 15b, 306b, 307b ... Arm base end 20 ... Front curtain drive lever 20a ... Front curtain drive pin 21 ... Rear curtain drive lever 21a .., Rear curtain drive pin 302, first blade 302 a, light shielding edge 302 b, light shielding edge portion 303, 304, 305, covering blade 306, first arm 307, second arm 308 a, 308 b, 308 c, 308 d, 309 a,
309b, 309c, 309d: caulking dowel 320: drive lever 320a: drive pin

Claims (21)

[Claims] 1. A substrate having a shutter opening, a light-shielding vane running on the shutter opening, and a base end rotatably attached to one of both sides of the shutter opening in the substrate. First and second arm members having a leading end connected to the one side of the light-shielding blade to form a parallel link, and the light-shielding blade is operated by being engaged with the first arm member by the parallel link. A driving member configured to drive the light-shielding blade, wherein the one end of the light-shielding blade is provided with the drive member and the arm before or after the light-shielding blade starts traveling. A shutter device, wherein the shutter device enters a portion where the engaging portion is not located in a movable region of the engaging portion with the member. 2. The end of the light-shielding blade on one side passes through the engagement portion before the travel of the light-shielding blade starts and after the travel of the light-shielding blade in the movable region of the engagement portion starts. 2. The shutter device according to claim 1, wherein the shutter device enters a front portion and moves out of a movable region of the engagement portion during a period from a start of traveling of the light-shielding blade to a completion of traveling. 3. The end of the light-shielding blade on one side is located outside the movable area of the engaging portion before the light-shielding blade starts running, and runs after the light-shielding blade starts running. 2. The shutter device according to claim 1, wherein a part of the movable area of the engagement part after the passage of the engagement part is entered before completion. 3. 4. An end portion of said light-shielding blade on said one side is a portion in which a front edge or a rear edge in a running direction of said light-shielding blade is extended to said one side. The shutter device according to claim 1. 5. A substrate having a shutter opening, a group of light-shielding blades that run on the shutter opening and are placed in a superimposed state or an expanded state, and a base end of one of two parts of the substrate on both sides of the shutter opening. A first arm member and a second arm member rotatably attached to a portion and connected to the one side of the light-shielding blade group at a distal end side of the base end portion to form a parallel link; A driving member that is engaged with one arm member to operate and drive the light-shielding blade group by a parallel link, wherein the one of the light-shielding blade groups in at least one of the light-shielding blade groups is provided. Is inserted into a portion where the engaging portion is not located in the movable region of the engaging portion between the driving member and the arm member in a state where the light shielding blade group is superimposed. The shutter device according to claim. 6. The light-shielding blade group travels from a superimposed state to a deployed state, wherein at least one end of at least one of the light-shielding blade groups is in the superposed state of the light-shielding blade group. In the movable region of the engaging portion, the portion enters the portion before the engaging portion passes after the start of traveling of the light-shielding blade group, and during a period from the start of traveling of the light-shielding blade group to the completion of traveling. 6. The shutter device according to claim 5, wherein said shutter device moves out of a movable area of said engaging portion. 7. The light-shielding blade group travels from a deployed state to a superimposed state, wherein the one end of at least one light-shielding blade of the light-shielding blade group is in the deployed state of the light-shielding blades. A portion of the movable region of the engagement portion after the engagement portion has passed between the start of travel of the light-shielding blade and the completion of travel of the light-shielding blade. The shutter device according to claim 5, wherein the shutter device is inserted into the shutter device. 8. The shutter device according to claim 5, wherein the at least one light-shielding blade includes a light-shielding blade connected to a most distal end side of the arm member. 9. The light-shielding blade according to claim 1, wherein the one end of the light-shielding blade is a portion in which a front edge or a rear edge of the light-shielding blade in the running direction extends to the one side. The shutter device according to claim 5. 10. A substrate having a shutter opening, a front curtain light-shielding vane running from a side where the shutter opening is closed to an opening side, and a rear curtain light-shielding blade running from a side where the shutter opening is opened to a side where the shutter opening is closed. And a base end portion rotatably attached to one of the portions on both sides of the shutter opening in the substrate, and a front end portion connected to the one side of the front curtain light shielding blade to form a parallel link. First and second leading curtain arm members for
A front-curtain driving member that operates by engaging with the front-curtain arm member and drives the front-curtain light-shielding blade to travel by a parallel link; and a base end portion rotatably attached to the one portion of the substrate and a front end. A first and a second rear curtain arm member connected to the one side of the rear curtain light shielding blade to form a parallel link; A rear curtain driving member that drives the curtain light-shielding blade to travel by a parallel link, wherein the one end of the front curtain light-shielding blade is moved before the front curtain light-shielding blade starts traveling. The front curtain driving member and the front curtain arm member are located outside the movable area of the front curtain side engaging portion, which is the engaging portion between the front curtain driving member and the front curtain arm member. This front curtain side of the movable area of the curtain side engaging portion While entering the portion where the engaging portion is not located, the end on the one side of the trailing curtain light shielding blade, before the start of travel of the trailing curtain light shielding blade, the trailing curtain drive member and the trailing arm arm member Of the movable region of the rear curtain side engaging portion, which is the engaging portion of the rear curtain side engaging portion, does not enter the portion where the rear curtain side engaging portion is located. A shutter device, which is located outside a movable region of a joining portion. 11. The end of the front curtain light-shielding blade on one side moves both the front curtain-side engagement portion and the rear curtain-side engagement portion before the start of travel of the front curtain light-shielding blade. It is located outside the area, and enters the portion where the front curtain side engaging portion is not located in the movable region of the front curtain side engaging portion during the period from the start of traveling of the front curtain light shielding blade to the completion of traveling. The end of the one side of the rear curtain light shielding blade is located before the start of travel of the rear curtain light shielding blade, and the rear curtain side engagement portion is not located in the movable area of the rear curtain side engagement portion. And moving out of the movable range of both the rear curtain side engaging portion and the front curtain side engaging portion during the period from the start of travel of the rear curtain light shielding blade to the completion of travel. The shutter device according to claim 10. 12. An end portion of the front curtain light-shielding blade on one side moves both the front curtain-side engagement portion and the rear curtain-side engagement portion before the start of travel of the front curtain light-shielding blade. Is located outside the region, and enters into a portion of the movable region of the front curtain side engaging portion after the front curtain side engaging portion has passed from the start of traveling of the front curtain light shielding blade to the completion of traveling. In addition, the end of the one side of the rear curtain light shielding blade is before the start of travel of the rear curtain light shield blade, and after the start of travel of the rear curtain light shield blade in the movable area of the rear curtain side engaging portion. The rear curtain side engaging portion has penetrated into a portion before passing, and the rear curtain side engaging portion and the front curtain side engaging portion between the start of travel of the rear curtain light shielding blade and the completion of travel. The shutter device according to claim 11, wherein the shutter device moves out of both movable regions. 13. The light-shielding blade according to claim 10, wherein the end of the light-shielding blade on one side is a portion in which a slit forming edge of each of the light-shielding blades extends to the one side. The shutter device according to any one of the above. 14. A substrate having a shutter opening, a group of front curtain light-shielding vanes running on the shutter opening to be superimposed from an expanded state, and after traveling over the shutter opening to be in an expanded state from the superposed state. A curtain light-shielding blade group, a base end of which is rotatably attached to one of the two parts of the substrate on both sides of the shutter opening; and a front end part of the front curtain light-shielding blade group with respect to the base end. A first and a second front curtain arm member connected to the one side to form a parallel link; and engaging the first front curtain arm member to operate and operate the front curtain light blocking vane group as a parallel link. A front-curtain driving member that is driven to travel, and a base end portion is rotatably attached to the one portion of the substrate, and a portion closer to the front end side than the base end portion is the one of the rear-curtain light-shielding blade groups. ~ side First and second rear curtain arm members that are connected to the first and second rear curtain arm members to form a parallel link, and a rear curtain that engages with the first rear curtain arm member and operates to drive the rear curtain light blocking blade to travel by the parallel link. A driving member, wherein at least one end of at least one of the front-curtain light-shielding blades in the front-curtain light-shielding blade group is driven by the front curtain when the front-curtain light-shielding blade group is deployed. The front curtain side engaging portion, which is an engaging portion between the member and the front curtain arm member, is located outside the movable region, and in a state where the front curtain light blocking blade group is superimposed, the front curtain side engaging portion is While entering the portion where the front curtain side engaging portion is not located in the movable area, the end on one side of at least one rear curtain light shielding blade of the rear curtain light shielding blade group is the rear curtain light shielding blade group. In the superimposed state, the rear curtain driving member and the rear curtain Of the movable region of the rear curtain side engaging portion which is an engaging portion with the arm member, the rear curtain side engaging portion is not located, and in the deployed state of the rear curtain light shielding blade group, A shutter device, which is located outside a movable area of a rear curtain side engaging portion. 15. An end of at least one of the front curtain light blocking blades on the one side of the front curtain light blocking blade group, wherein the one end of the front curtain light blocking blade is in a deployed state of the front curtain light blocking blade group. The rear curtain side engaging portion is located outside both movable regions, and while the front curtain light shielding blade travels from the deployed state to the superimposed state, the front curtain side of the movable region of the front curtain side engaging portion. While entering the portion where the engaging portion is not located, the one-side end of at least one rear curtain light-shielding blade of the rear curtain light-shielding blade group is placed in the rearward position with the rear curtain light-shielding blade group superimposed. In the movable area of the curtain-side engaging portion, the rear-curtain-side engaging portion enters a portion where the rear-curtain-side engaging portion is not located, and the rear-curtain-side engaging portion moves while the rear-curtain light-shielding blade group travels from the superimposed state to the deployed state. And moving out of both movable regions of the front curtain side engaging portion. The shutter device according to claim 14,. 16. An end of said at least one front curtain light shielding blade of said front curtain light shielding blade group on one side of said front curtain light shielding blade group, wherein said front curtain side engaging portion and said front curtain light shielding blade group are deployed. The rear curtain side engaging portion is located outside both movable regions, and while the front curtain light shielding blade travels from the deployed state to the superimposed state, the front curtain side of the movable region of the front curtain side engaging portion. While entering the portion after the engaging portion has passed, the end of the one side of at least one rear curtain light shielding blade of the rear curtain light shielding blade group is in a superimposed state of the rear curtain light shielding blade group, In the movable area of the rear curtain side engaging portion, after the rear curtain side light shielding blade group starts traveling, it enters into a portion before the rear curtain side engaging portion passes, and the rear curtain side light shielding blade group is shifted from the superimposed state. The rear curtain side engaging portion and the front curtain side engaging portion during traveling to the unfolded state. The shutter device according to claim 15, characterized in that moves out of the movable region of both. 17. The at least one front curtain light shielding blade includes a front curtain light shielding blade connected to the most front end side of the front curtain arm member, wherein the at least one rear curtain light shielding blade is the rear curtain. 17. The shutter device according to claim 14, further comprising a rear curtain light shielding blade connected to a most distal end side of the arm member. 18. The light-shielding blade according to claim 14, wherein the end on one side of each of the light-shielding blades is a portion where a slit forming edge of each of the light-shielding blades extends to the one side. The shutter device according to any one of the above. 19. An apparatus comprising the shutter device according to claim 1. Description: 20. A camera comprising the shutter device according to claim 1. Description: 21. The shutter according to claim 1, further comprising: a shutter device according to claim 1; and a spatial light modulator and other storage display means for storing a projected image and displaying the stored image. An image display device, wherein an image is projected and stored in the storage and display means in a state where the device is closed and external light is blocked, and a storage image is displayed in the storage and display means in a state where the shutter device is opened. .