JPH071575B2 - Record carrier loading device - Google Patents

Description

The present invention relates to a record carrier loading device for loading a record carrier at a predetermined position.

<Prior Art> As this type of loading device, there is a tape loading device used in a video tape recorder (VTR), and this tape loading device will be described below as an example.

The VTR's running system has traditionally been set almost uniformly. However, with the recent miniaturization of VTRs,
The development of a new tape running system has become a focus. An example thereof will be described with reference to FIG.

FIG. 4 is a view showing a tape traveling system of a conventional VTR, in which 51 is a rotary head cylinder having a rotary head on the outer circumference,
53a and 53b are moving guide posts that form the first guide post unit, 55a and 55b are moving guide posts that form the second guide post unit, 71 is a supply reel, 72 is a take-up reel, and 73,74,75. , 76,77 are fixed guide posts, 78
Is a moving guide post, 79 is a capstan, 80 is a pinch roller that moves together with the moving guide post 78, 81 is a tape tension control pin, and T is a magnetic tape.

In the above-described structure, the first and second moving guide post units pull out the tape T from the opening portion of the cassette (not shown) that stores the reels 71 and 72, and the tape T is at the position shown in FIG. It is locked and fixed by the illustrated catching member.

In the tape running system shown in FIG. 4, the height of the tape T is raised toward the position where the tape T is inserted into the cylinder 51 so that the tape T is at the same height as the take-up reel 72 while being wound around the cylinder 1. The tape is lowered until it becomes, and the tape loading method that is effective in reducing the height of the VTR is adopted.

In this system, the moving guide posts 55a and 55b provided on the second guide post unit 55 that has a vector for raising the tape are posts that are important for stable running of the tape, and the accuracy of the position and the inclination can be obtained. It is necessary to carry out firm chatting.

FIG. 5 shows a conventional loading device of this kind, in which 51 is a head cylinder, 52 is a first loading ring,
53 is the first guide post unit, 53a, 53b are provided on the first guide post unit and are movable tape guides that move with the unit, 54 is the second loading ring, 55 is the second guide post unit, and 55a, 55b are A movable tape guide provided on the second guide post unit and moving together with the unit, 56 is a loading motor, 56a is a gear fixed to the drive shaft of the loading motor 56, and 57 is a gear 56.
a and a gear that meshes with the first loading ring 52, 58 a gear that meshes with the gear 57 and the second loading ring 54,
Reference numerals 59a and 59b denote a cache and a T for the first loading unit 53 and the second loading unit 55, respectively.
Is a magnetic tape.

In the above structure, when the loading motor 56 rotates, the first loading ring 52 rotates via the gears 56a and 57, and the speed is reduced by the gears 57 and 58 so that the second loading ring 54 becomes the first loading ring. Rotate in the same direction at a slower speed than less than 52 degrees. At the end of loading, the first and second guide post units 53 and 55 are simultaneously charted by the charters 59a and 59b, respectively.

Each guide post unit 53,55 is
The force exerted by the springs 60 and 61 causes the chuck 59 to move.
It is performed by being pressed by a and 59b.

<Problems to be Solved by the Invention> In the conventional loading device as described above, two loading rings are respectively mounted via gears to move the first and second guide post units. It was connected to the motor and moved separately. With such a configuration, it is difficult to reduce the diameter of the loading ring, and it is necessary to align the phases of the two loading rings, which complicates the mechanism and prevents the size and weight from being reduced.

In particular, when the first and second guide post units are to be clutched, if the above-mentioned phase alignment is not accurate, the pressing and urging force to one of the chattering members will be weakened.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a record carrier loading device that can be reduced in size and weight and that can securely fix a guide post unit.

<Means for Solving the Problems> In order to achieve the above problems, the present invention includes first and second guide post units provided with guides for guiding the record carrier. A device for loading a record carrier to a predetermined position by moving a second guide post unit around a cylinder and catching both units at different positions, and having a first and a second coupling portion. A first rotating ring, a second rotating ring having third and fourth connecting portions, and a releasing member for releasing the connection between the first connecting portion and the third connecting portion, The second rotation ring rotates due to the rotation operation of the first rotation ring due to the connection between the first connection portion and the third connection portion.
When the rotating ring of the first rotating ring rotates by a predetermined amount, the release member releases the connection between the first connecting portion and the third connecting portion, and only the first rotating ring rotates, and When the first rotation ring further rotates by a predetermined amount, the second rotation ring is rotated again by the connection between the second connection portion and the fourth connection portion. It is configured to rotate with a dynamic operation.

<Embodiment> The construction and operation of an embodiment of the record carrier loading device of the present invention will be described below with reference to FIGS.

FIGS. 1 (A), (B), (C), and (D) are diagrams showing a main configuration of a loading device according to an embodiment of the present invention, and FIG. 1 (A) is a diagram before loading. FIG. 1 (B) and FIG. 1 (C) show the state during loading, and FIG. 1 (D) shows the state at the end of loading.

In these figures, 1 is a loading ring, and 6 is a driven ring that is driven by the ring 1, and these are arranged in a stack as shown. 10 is the first guide post unit, 20
Is the second guide post unit, 30 is the first guide structure for the first guide post unit,
Reference numeral 40 is a second casing structure for the second guide post unit.

In the hole 11 formed in the first guide post unit 10,
Base attached to loading ring 1 (not shown)
The projecting portion 2 formed at is engaged. The first guide post unit 10 is connected to the loading ring by a spring 49 and is urged in the direction of arrow A in FIG. 1 (A). The unit 10 is a loading ring 1
Legs 10a, 10b are in contact with the sleeve 48 so that the record carrier (for example, a magnetic tape) is obliquely wound around a cylinder (not shown) using the sleeve 48 as a guide rail. As a result, the unit 10 can move in the rotational direction of the loading ring 1 while maintaining a fixed relationship with the ring 1.

Further, since the first guide post unit 10 winds the tape diagonally around the cylinder (not shown) following the sleeve 48 as the guide rail, the first guide post unit 10 also rolls in the front and back directions on the paper plane orthogonal to the rotation direction. It is movable with respect to the Ding ring 1. In the first guide post unit 10,
Guides 12, 13 for guiding the record carrier (eg magnetic tape)
Has been planted.

The arm 20a of the second guide post unit 20 is attached to a base 6b attached to the driven ring 6 so as to be rotatable about a shaft 22, and the arm 20b is rotated about the shaft 20c with respect to the arm 20a. It is mounted so that it can move 20
Guides 23 and 24 for guiding the record carrier are planted in b.

Further, a hook 27 described below is held between the base 6b and the arm 20a shown in FIG. 1 (B) in the arrangement shown in FIG. 2 (A), and the hole 27a is fitted to the shaft 22. It is installed. Further, both ends of a torsion coil spring (not shown) are fixed to the side surface 20d of the arm 20a and the spring hooking portion 27b of the hook 27, respectively, and are wound around the shaft 22 so that the arm 20a is shown in FIG. 1 (B). It is biased in the B direction.

The hook 27 has elasticity and has, for example, the shape shown in FIG. 2 (FIG. 2A is an enlarged plan view, and FIG. 2B is a partial side view of FIG. 2A). 27c is a rectangular hole, and an abutting piece 27d is bent up at one end thereof. The protrusion 3 bent from the loading ring 1 is engaged with the rectangular hole 27c. That is, when the loading ring 1 is rotated, the rectangular hole 27c and the projection 3 are in the engaged state until the second guide post unit 20 is cut by means described later, and the second guide post unit 20 and The driven ring 6 is entrained by the loading ring 1 and rotates.

The first casing structure 30 is arranged in a fixed relationship with the apparatus body.

The second casing structure 40 is arranged in a fixed relationship with the main body of the apparatus, and mainly includes a cam 41, a cache 42, and guides 43, 44.

The cam 41 is rotatably attached to a shaft 45, is biased by a torsion coil spring 47 in the direction indicated by C in FIG. 1 (A), and is in contact with the sleeve 48 of the loading ring 1. A cam 46 is coupled to the loading ring 1, and the cam surface 46a is associated with the rotation of the loading ring 1.
Contacts the cam surface 41c of the cam 41 to rotate the cam 41 in the direction of D in FIG. 1 (B). Further, the cam surfaces 41a and 41b have guides 43,
Together with 44, the second guide post unit 20 is guided to the cache 42 as it rotates. The Chart 42 is
The second guide post unit 2b comes into contact with the same unit 20b.
To take a picture.

In the unloading state shown in FIG. 1 (A), when a loading motor (not shown) is switched on to load the record carrier, the rotation of the motor is changed by a known gear train or the like. 1 is transmitted to the gear portion 1a, and the ring 1 rotates together with the first guide post unit 10 in the arrow A direction. At this time, the protrusion 3 bent and raised from the loading ring 1 and the rectangular hole 27c of the hook 27 in the second guide post unit 20 are engaged with each other so that the second guide post unit 20 and the driven ring 6 are also loaded. 1 and is rotated in the direction A.

When the above rotation progresses and the cam 46 connected to the loading ring 1 contacts the cam 41 as shown in FIG. 1 (B),
The cam 41 is rotated in the direction of the arrow D by the cam surface 46a, so that the cam surface 41a is separated from the guide 43, and the second guide post unit 20 can be guided. further,
As the rotation of the loading ring 1 progresses, the cam 41 falls on the cam surface 46b as shown in FIG. 1 (C),
The cam surface 41a approaches the guide 43, and the cam surface 41b brings the second guide post unit 20 to the side of the carriage 42,
Temporarily, a chat is performed. At the same time, the upper inclined portion 27 of the tip of the hook 27 in the second guide post unit 20.
e (see FIG. 3 (A)) rises along the downwardly inclined portion 44d of the guide 44 due to its elasticity and rides on the flat portion 44e (see FIG. 3 (B)). Therefore, the hook 27 and the loading ring are provided. The protrusion 1 is disengaged from the protrusion 3, and only the loading ring 1 continues to rotate in the direction of arrow A.

The loading ring 1 continues to rotate, and when the first guide post unit 10 reaches the position of the first casing structure 30 as shown in FIG. 1 (D), the first guide post unit 10 moves to the first casing structure 30. Is contacted with and is caught. The loading ring 1 continues to rotate until the protrusion separates from the hole 11, further stores the spring 49, and generates the pressing force in the direction indicated by E in FIG. The post unit 10 is reliably caught by the force. Also, the second guide post unit
When the protrusion 1b of the loading ring 1 comes into contact with the protrusion 6a of the driven ring 6 and rotates, 20 is pushed into the push-in carriage 42 until further pushed. Thereafter, the cam 46 rotates the cam 41 in the direction of the arrow F shown in FIG. 1D, and the spring 47 urges the second guide post unit 20 in the direction of the arrow G, thereby firmly catching.

In such a structure, the hook 27 is loaded by some external force, for example, an abnormally large tension is applied to the tape in the middle of loading as shown in FIG. 1 (B).
When the engagement between the protrusion 3 and the projection 3 is disengaged, the second guide post unit 20 is left unfinished. However, in the remaining second guide roller unit 20, when the loading further progresses, the projection 6a of the driven ring 6 contacts the projection 1b of the loading ring 1 so that the driven ring 6 rotates.

When the second guide post unit 20 comes close to the cam 41 due to the contact between the projection 1b of the loading ring 1 and the projection 6a of the driven ring 6, the cam 41 has fallen on the cam surface 46 described above. As shown in FIG. 1 (C), 41a is in a state of approaching the guide 43 with a slight gap (usually the above-mentioned temporary cutting state). Therefore, in this case as well, the second guide post unit 20 has the second casing structure.
Guided to 40.

During unloading, the loading motor rotates in the opposite direction to that during loading, and the loading ring 1 also rotates in the opposite direction. Then, when the protrusion 3 of the loading ring 1 abuts against the upper inclined portion 27e of the hook 27 and presses it, the hook 27 returns to its original position shown in FIG. The portion 3 is engaged with the hook rectangular hole 27c, and the driven ring 6 and the second guide post unit 20 are advanced to the loading ring 1 again to rotate and return to the state shown in FIG. 1 (A).

In the tape loading apparatus as described above, the loading ring 1 and the driven ring 6 are coupled by the projection 3 and the hook 27 until the second guide post unit 20 is guided to the casting structure 40. After the connection is released, the connection after the first guide post unit 10 comes close to the casing structure 30 is performed by the projections 6a and 1b. Since the projections 6a and 1b are provided directly on the driven ring 6 and the loading ring 1, respectively, the relative timings of guiding and pressing both guide post units 10 and 20 to the respective casting structures 30 and 40 are extremely accurate. Can be specified in. Further, as a result of this, the pressing of both guide post units against the casing structure is performed simultaneously by utilizing the driving force of the loading motor, so that it becomes extremely reliable and strong.

<Effects of the Invention> As described above, according to the record carrier loading device of the present invention, it is possible to reduce the size and weight and to securely fix the first and second guide post units.

[Brief description of drawings]

FIGS. 1 (A), (B), (C), and (D) are diagrams showing a main configuration of a loading device according to an embodiment of the present invention, and FIGS. Fig. 3 (A) and (B) are the parts diagram of the hook in Fig. 3, and Fig. 4 shows the engagement relationship between the hook and the loading ring in Fig. 1. Fig. 4 is the tape running system of the conventional VTR. FIG. 5 is a diagram showing a conventional loading device. 1 ... loading ring, 1b ... projection, 3 ... projection part, 6 ... driven ring, 6a ... projection, 10 ... first guide post unit, 20 ... second guide post unit, 27 …… Foot, 30 …… First casting structure, 40…
… Second casing structure.

Claims (1)

[Claims] 1. A first and second guide post unit provided with a guide for guiding a record carrier, wherein the first and second guide post units are respectively moved around a cylinder, and both units are moved. A device for loading a record carrier to a predetermined position by catching at different positions, the first rotation ring having first and second coupling parts, and the third and fourth coupling parts. A second rotating ring; and a releasing member for releasing the connection between the first connecting portion and the third connecting portion, and the second connecting ring and the third connecting portion are connected to each other.
Of the first rotating ring rotates with the rotating operation of the first rotating ring, and when the first rotating ring rotates by a predetermined amount, the release member causes the first connecting portion to be connected to the first connecting portion. When the connection with the third connecting portion is released and only the first rotating ring is rotated, and when the first rotating ring is further rotated by a predetermined amount, the second connecting portion and the fourth connecting ring are connected. By combining with the connecting part of
2. The record carrier loading device according to claim 1, wherein the rotating ring rotates again with the rotating operation of the first rotating ring.