JP2660065B2 - camera - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of performing different kinds of photographing such as normal photographing and macro photographing with a simple switching mechanism.

[Conventional technology]

As a simple type camera in pursuit of low cost, for example, a film unit with a lens such as "Sharp Run Hi" (product name) is known. This film unit with lens is designed to focus from around 1m to infinity without adjusting the focus of the lens. But,
The subject was too small to take a close-up image of the flower or take a document, which was not enough for these subjects.

Under such circumstances, a normal lens and a macro lens having a single lens configuration are juxtaposed in a common lens holder, and the lens holder is rotated in a plane perpendicular to a photographing optical axis to photograph one of the lenses. A simple type of macro switching mechanism for use in a computer has been studied. According to this, it is possible to realize a low-cost macro switching mechanism which is superior in operability, has a simple structure, and is simple in structure as compared with a conventional system in which an attachment lens is used or a photographic lens is largely extended to perform close-up photography.

[Problems to be solved by the invention]

In the above simplified camera, the parallax occurs because the angle of view changes when switching from standard shooting to close-up shooting. Therefore, means for displaying the degree of parallax and correcting the degree is required. Moreover, due to the nature of the camera, the parallax correction means must be simple and low cost.

[Object of the invention]

An object of the present invention is to provide a camera that can perform parallax correction accompanying switching to close-up photography with a very simple and compact configuration.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a strobe device, a normal lens for standard photographing, and a macro lens having a different focal length from the normal lens and a subject distance suitable for photographing being closer than the normal lens. And a lens holder having a smaller aperture than the aperture used for the normal lens behind the macro lens, and the lens holder is rotated in a plane perpendicular to the photographing optical axis. Switching means for freely supporting and positioning one of the normal lens and the macro lens on the photographing optical axis; and a parametric display in the viewfinder corresponding to the lens fixed to the lens holder and positioned on the photographing optical axis. The parallax display means for displaying the reference of the flux correction is provided. [Operation] According to the above, for example, the normal lens During normal shooting positioned above, the photographer to photograph captures a subject to normal finder field as a reference. Next, the macro lens is positioned on the photographing optical axis by rotating the lens holder. At this time, the parallax display means is inserted into the finder, and the center of the screen or the photographing range when the macro lens is used is displayed in the finder, so that the photographer can correct the parallax by capturing the subject based on the parallax display means. Can be taken.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

〔Example〕

FIG. 5 shows a film unit with a lens (hereinafter referred to as "film unit") 11 wrapped in a paper box 10. FIG. paper box
An opening for exposing the lens and operation parts of the film unit 11 is provided at 10, and indices 8 and 9 indicating switching between macro photography and normal photography are printed. A macro lens 14 is positioned on a photographing optical axis 13 in an opening 12 on the front surface of the film unit 11. At this time, the switching knob 16 is located at the right end in the slot 17, and the target mark 19 is inserted in the finder 18.

As shown in FIG. 2A, the target mark 19 has an opening 19a having a diameter d (= 1.5 mm) in a disk having a diameter D (= 6 mm).
The switch knob 16 is inserted into and removed from a hole 21 formed in the inner wall of the finder 18.
The target mark 19 is inserted into and removed from a hole 21 formed in the inner wall of the finder 18 by operating the switching knob 16. A flash light emitting unit 22 is provided at the right end of the front surface. Code 23
Reference numeral denotes a strobe pressing unit that starts strobe charging and validates a synchro signal obtained when the shutter is opened. A shutter button 25 is provided on the upper surface of the film unit 11.

As shown in FIG. 3, the patrone chamber 24 and the shutter mechanism
A shutter base plate 28 is provided at the center of a main body 27 provided with 26. The shutter base plate 28 has a recess 31 for securing a driving space for the shutter blades 29, and an opening 32 formed in the recess 31. A bearing portion 34 is provided behind a cutout portion 33 formed in an upper portion of the shutter base plate 28, and a finder eyepiece window 47 is opened on a back plate behind the bearing portion 34. A projection 36 is formed in the patrone chamber 24, and a hook 38 is formed in the film roll chamber 37 at the right end of the main body 27. A main condenser 44 is built in the right side of the film roll chamber 37. Patrone Room 24
The back cover 45 is fixed in the film roll chamber 37 with a film roll formed by drawing out a film from the patrone in advance. The film roll chamber 37 may be loaded with a patrone having a film wound thereon, and the patrone chamber 24 may be loaded with a patrone for winding an exposed film from the patrone. Further, a system in which an exposed film is wound up without using a patrone may be employed.

At the center of the strobe circuit board 39 having the strobe light emitting portion 22, contact pieces 48, 49 which are electrically connected by the pushing of the strobe pressing portion 23 are provided. The conduction of the contact pieces 48 and 49 charges the main capacitor 44 and validates the synchro signal. The strobe circuit board 22 is attached to the main body 27 by engaging the engagement electrode 41 on the left end with the projection 36 and engaging the L-shaped hole 42 at the center with the hook 38. At this time, a dry battery 46 is placed between the electrode 43 provided at the lower portion of the strobe circuit board 39 and the engagement electrode 41.
Is set.

A cutout 52 and a stopper 53 are formed on the upper part of the fixed plate 51 attached to the front surface of the shutter base plate 28,
An opening 54 for exposing the film is formed in the center. Below the opening 54, an arc-shaped convex portion 57 for guiding rotation of a lens holder 56 described later is provided. Arc-shaped convex
At the right end of 57, a stopper 58 is formed. Fixed plate 51
A pin 59 is provided at the lower end of the.

The lens holder 56 disposed on the front surface of the fixed plate 51 is rotatable by inserting the shaft member 61 into the bearing portion 34. The lens holder 56 has a small stop opening 62 and a larger stop opening 63. Around the apertures 62 and 63, frames having a size corresponding to the diameter of the lens to be fitted are formed. The macro lens 14 is provided in front of the aperture 62, and the normal lens 64 is provided in front of the aperture 63. Thereby, both lenses 14, 64 are arranged on the same plane. The macro lens 14 has, for example, a focal length of 33 mm, an F value of 27,
The subject distance that can be covered within the depth of field is 0.4 to 1.2 m, and the normal lens 64 has a focal length of 35 mm, an F value of 11, and the subject distance that can be covered within the depth of field of 1.2 m to ∞. By reducing the aperture 62, the depth of field of the macro lens 14 can be increased.

The switching knob 16 is provided in a sector portion 65 below the lens holder 56, and an L-shaped regulating member 66 and a target mark 19 are provided above the lens holder 56 in addition to the shaft member 61. As shown in FIG. 3, a step for securing a space for a toggle spring 67 is formed on the rear surface of the lens holder 56, and a pin 68 is provided here. The pin 68 locks one end of the toggle spring 67 together with the pin 59.

The opening 12, the finder 18, and the like are formed in the front cover 69, and the film unit 11 is assembled by fitting the front cover 69 to the main body 27.

Hereinafter, the operation of the present embodiment having the above configuration will be described.

First, when the switching knob 16 is operated in the direction of the index 9 during normal photographing, the lens holder 56 turns clockwise on the fixed plate 51 about the shaft member 61 as shown in FIG. This turning is smoothly performed in a plane perpendicular to the photographing optical axis 13 by being guided by the L-shaped regulating member 66 and the arc-shaped convex portion 57. When the sector portion 65 contacts the stopper 53, the clockwise rotation of the lens holder 56 is stopped, and the first rotation is stopped.
The state shown in FIG. At this time, since the lens holder 56 is urged in the direction of the stopper 53 by the toggle spring 67, it is positioned between the stopper 53 and the toggle spring 67. Thereby, the normal lens 64 is positioned on the photographing optical axis 13, and the photographer captures the subject based on the normal field of view of the viewfinder 18. At this time, a subject of 1.2 m to ∞ can be photographed.

Next, the switching knob 16 is operated in the direction of the index 8. As a result, as shown in FIG.
Turns counterclockwise while resisting the biasing force of the toggle spring 67. At this time, the lens holder 53 rotates in a plane perpendicular to the photographing optical axis 13 without being shaken by the L-shaped regulating member 66. Further, since the switching knob 16 is located outside the pin 68, the switching knob 16 can be turned counterclockwise without requiring a strong force, and the operation is facilitated. When the rotation of the lens holder 56 is continued, the biasing force of the toggle spring 67 acts in a direction to help the counterclockwise rotation from the middle. And FIG. 1 (B)
As shown in (5), the counterclockwise turning is stopped with the sector portion 65 in contact with the stopper 58. At this time, the macro lens 14 is positioned on the photographing optical axis 13, and the target mark 19 is inserted into the finder 18 through the hole 21. In this state, the position of the lens holder 56 is fixed between the toggle spring 67 and the stopper 58. At this time, the target mark 19 is finely observed as shown in FIG. 2B by the diffraction phenomenon of the subject light, so that the center of the subject can be captured in the opening 19a of the target mark 19. Thus, parallax correction can be performed with reference to the target mark 19.

Further, by pressing the shutter button 25 while pressing the flash pressing section 23, flash photography can be performed. Macro photography is performed when the subject is closer than 1.2m, so strobes are effective. When flash photography is performed, overexposure may occur. This can be dealt with by reducing the aperture 62.

Further, as shown in FIG. 6, a parallax correction frame 70 may be provided on the lens holder 23. As a result, the parallax correction frame 70 is inserted into the finder 18 at the time of macro photography, and a finder field near the photographing optical axis can be obtained as shown in FIG.

〔The invention's effect〕

As described above, in the camera of the present invention, the parallax display means is provided on the lens holder.
It is possible to provide a camera capable of switching the photographing magnification and performing the parallax correction accompanying the change with a very simple configuration.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the operation of a film unit embodying the present invention. FIG. 2 is an operation explanatory view showing an outline of a finder visual field. FIG. 3 is an exploded perspective view of a film unit embodying the present invention. FIG. 4 is a sectional view of a main part of the film unit shown in FIG. FIG. 5 is an external view of the film unit shown in FIG. FIG. 6 is a schematic view showing a lens holder of another film unit embodying the present invention. FIG. 7 is an operation explanatory view according to the embodiment of FIG. 13 ... Optical axis 14 ... Macro lens 18 ... Viewfinder 19 ... Target mark 53, 58 ... Stopper 56 ... Lens holder 64 ... Normal lens 67 ... Toggle spring 70 ... Parallax correction frame.

Claims (1)

(57) [Claims] 1. A strobe device, a normal lens for standard photographing, and a macro lens having a different focal length from the normal lens and an object distance suitable for photographing being closer to the subject than the normal lens, and Behind the macro lens, a lens holder having an aperture opening smaller in diameter than the aperture used for the normal lens is provided. The lens holder is rotatably supported in a plane perpendicular to the photographing optical axis. Switching means for positioning one of the lens and the macro lens on the photographing optical axis; and a parallax correction reference displayed in the viewfinder corresponding to the lens fixed to the lens holder and positioned on the photographing optical axis. And a parallax display unit.