JPS607770B2 - Camera with a protective cover for the photographic lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a camera having a protective cover for a photographic lens;
More specifically, the present invention relates to a camera having a protective cover for a photographic lens that is slidably attached to a camera body and moves between a position covering the photographic lens and a position exposing the lens.

As is well known, in order to protect the photographic lens from dust, fingerprints, and scratches, general cameras that use 35-frame roll film do not attach the lens cap to the lens barrel except when taking pictures. It is designed to be recessed to cover the photographic lens.

However, this lens cap has the disadvantage that it is easily lost because it is removed when taking pictures. In addition, the finder lens of the finder optical system, which must be protected in the same way as the photographic lens, is attached to the camera body, such as in ultra-compact cameras with a fan-flat rectangular shape that use special small cartridge-type film. On the other hand, with the exception of cameras that have a case that slides out and covers more than half of the camera body, the film remains exposed (unprotected) in cameras that use general 35mm film.

In addition, with ultra-compact cameras that have the above-mentioned sliding case type lens protection cover, when the case is slid to expose the shooting lens or finder lens during shooting, the case moves to the side, which reduces the overall size of the camera. Since it is nearly twice as large, it cannot be used in cameras that use general 35mm roll film.

Furthermore, some of the above-mentioned ultra-compact cameras have a photographing lens, a finder lens, etc. protected by a double-folding cover, but the mechanism is complicated and cannot be used in general cameras. Although we recognize the need for general cameras that use 35-inch roll film, the reason why conventional cameras such as rangefinders did not have a protective cover for the finder lens was that the design was extremely complicated. This was based on the preconception that it would be expensive and impractical.

On the other hand, as is well known, a general camera using 35-side roll film is provided with a film winding knob on the upper side of the camera.

This winding knob is used to rewind the photographed film that has been wound from the film cartridge onto the winding spool into the cartridge when the photographic film is finished. This film winding knob is formed of a short circular rotary body having a film winding shaft and is designed to simply operate the film winding, or it is used for rewinding the film. a rotating body of short circadian body having an axis;
It consists of a film winding arm that is attached to the upper part of the rotating body by a hinge so that it can be raised and lowered freely.It is placed in a storage hole provided on the top surface of the camera and can be raised in the axial direction. There are some that are attached and can be linked to the coin holder mechanism on the back cover of the camera. When rewinding the film, the film rewinding unit having the rewinding arm is configured to rotate the knob by raising the arm from the rewinding knob and rotating it. The film is rewound by a shaft.

When the winding knob is pushed into the storage hole, the locking mechanism of the camera back is activated to open the camera back and hold it in an ugly manner, and when the knob is pulled upward from the storage hole, the camera back is opened. The lock is released and the case back can be opened. By the way, the film rewind knob mentioned above is
Not only is this completely unnecessary when using the camera to take pictures, but it should not be operated.

Therefore, it is desirable to prevent the film from being rewound or the back cover from opening due to careless operation during photographing. Furthermore, since the film winding knob is operated only when the film has finished and the user is trying to rewind it, it is desirable to be able to disable photographing at this time.

In order to prevent the above-mentioned accidental operation of the film rewinding knob, it is necessary to attach the protective cover for the photographing lens to the camera, and to disable the operation of the film rewinding knob when the cover exposes the lens. Just do it.

In view of the above points, an object of the present invention is to
A camera with a photographic lens protective cover that disables the operation of the film winding knob during photographing by using an extremely simple sliding lens protective cover that covers the top and part of the upper part of the back. is to provide.

The present invention will be explained below with reference to an illustrated embodiment. 1st
As shown in Figures 1 to 3, the camera body 1 has a camera body 5 that constitutes the main body of the camera, the upper part of which is a lid-shaped decorative top plate 6 with an open lower surface, and the lower part with a lid-shaped decorative top plate 6 with an open upper surface. Each of the decorative lower plates 7 is covered with a decorative lower plate 7, and the overall appearance shape is a horizontally elongated rectangular parallelepiped.

The camera of this embodiment is an automatic exposure camera using roll film in 35 trays, and the camera body 5 is
The central part of the front wall 5a of the front wall 5a is raised further forward, and the photographing lens 2 is disposed inside an opening 5c (see Fig. 2) made in the central part. A light receiving window 15 (see FIG. 2) for side light is provided above. Further, the center portion of the upper wall 5b of the camera body 5 is also raised further upward, and the objective lens 3 of the finder optical system and the eye lens 3a (see FIG. 4) are disposed inside the center portion. On the right side of the upper surface of the upper plate 6, a film spooling knob 10 is arranged, and on the left side, a shutter release plow 11, a display window for a film frame number counter, and an indicator 14 are arranged. Further, a film winding knob 12 is provided on the back side of the left side.

As shown in FIGS. 1 and 2, there is a storage hole 2 drilled in the upper surface of the upper plate 6.
3 (see Fig. 3), and in this pushed position, the back cover 16 is locked in the closed state and is also retracted from the sliding passage of the protective cover 4. ing.

In addition, as shown in FIG. 3, this knob 10 is lifted up from inside the storage hole 23 and floats to the surface, and unlocks the hair lid 16 and opens the lid. It enters into the sliding passage of the protective cover 4.The back cover 16 is attached to the camera body 1 so as to be openable and closable by a hinge (not shown) attached to the left side of the camera body 5. It is being

Furthermore, an abutment frame 20 is fixed to the left side of the center of the camera body 5, and the inner end surface of the protective cover 4 is abutted when the protective cover 4 moves to a position covering the photographic lens 2. . This abutting Z frame 20 has an inner end surface (the right end surface in FIG. 2) located to the left of the protrusion of the front wall 5a, to the left of the protrusion of the upper wall 5b, and a sharp eye lens on the upper back surface. To be located toward the outside of 3a,
It is formed of a thin plate that is bent along the front, top, and back tops of the central portion of the camera body 1. The protective cover 4 includes a front plate 4a and a top plate 4b that are bent along the front, top, and upper rear surfaces of the camera body 1, including the central raised portions of the front wall 5a and top wall 5b of the camera body 5.
and a back plate 4c (see FIG. 4), and is configured to cover the outer surfaces of the lenses 2, 3, and 3a.

When the cover 4 is moved to the position shown in FIG. 2 exposing the lenses 2, 3, 3a and the light receiving window 15,
It is formed to have a lateral center that does not protrude laterally from the camera body 1. In the protective cover 4 configured in this way, as shown in FIG. The inner surface of the upper part of the front plate 4a of the cover 4 and the inner surface of the rear plate 4c are arranged in contact with the front and rear surfaces of the upper part of the camera body 1, respectively, so that the cover 4 can be slid along the longitudinal direction of the camera body 1. Then, it is glued to the camera body 1.

A guide slot 1 extending in the longitudinal direction of the camera body 1 is provided in the lower twill portion of the front plate 4a of the protective cover 4.
The protective cover 4 is moved from the position shown in FIG. 1 to the position shown in FIG. The distance traveled is now regulated. Further, the front plate 4a of the cover 4 is fixed by the dish-shaped head of the screw 19.
This prevents the lower part from being pushed forward and shifting.
The protective cover 4, which is movably attached to the camera body 1 in this way, slides in the longitudinal direction of the camera body 1 and covers the above-described lenses 2, 3, 3a and the light receiving window 15 in FIG. It moves to a position where it completely covers and a position where the lenses 2, 3, 3a and the light receiving window 15 shown in FIG. 2 are completely exposed. In the stop position shown in FIG. 2, the camera body 1 is
It is designed not to protrude outward from the right end surface of the camera body 1, and also covers most of the film rewinding knob 10 disposed on the top surface of the camera body 1. Therefore, in the camera of this embodiment in which the film spooling knob 10 cannot be operated and the back cover 16 is opened by lifting the knob 10 upward, when the camera is in use with the cover 4 open, This prevents the back cover 16 from being opened inadvertently. Further, as shown in FIG. 3, when the cover 4 covers the lenses 2, 3, 3a and the light-receiving window 15, and the hair cover 16 is opened when the tassel knob 10 is lifted and floated above the camera body 1, Even if an attempt is made to slide the cover 4 to the right, since the winding knob 10 is located within the sliding path of the cover 4, the right end surface of the cover 4 will hit the knob 101, causing the camera to slide towards the lens 2, 3 and 3a and the light receiving window 15 are exposed.

Furthermore, in this state, the protective cover 4 opens the power switch S which is interlocked with a stopper member 17, which will be described later, by its closing operation, so that power is not wasted. L And, the protective cover 4 also covers each lens 2 in FIG.
3, 3a and the light-receiving window 15 are exposed, the top wall 5 of the camera body 5 is moved as shown in FIG.
The inner end surface of the stopper member 17 that protrudes upward from b comes into contact with the stopper member 17, thereby preventing the cover 4 from moving backwards. It can be stopped at the position shown in the figure).

The stopper member 17 is formed of a rotating member whose fulcrum is rotatably attached to the upper wall 5b by a fixed shaft 21, and a torsion spring 22 wound around the fixed shaft allows the stopper member 17 to When the cover 4 is opened, it rotates counterclockwise around the shaft 21 and protrudes onto the top wall 5b, and when the cover 4 is opened, the cover 4
It abuts against the inner end surface of. Further, at this time, the stepped portion 17a comes into contact with the back surface of the upper wall 5b, thereby limiting its rotational position. Furthermore, this stopper member 17 is used as a power switch S for an electric circuit such as an exposure meter circuit in the camera.
The switch S is opened and closed, and when it protrudes above the upper wall 5b, the switch S is closed.

Also, in order to close the cover 4, this stopper member 17
is pushed into the camera body 1 from above the top wall 5b and evacuated from the flame movement path of the cover 4. At this time, the power switch S is also opened. Note that when the protective cover 4 is moved to a position covering the photographic lens 2, the iron fitting hole (not shown) provided on the back side of the top plate 4b of the cover 4 is inserted into the stopper member. 17 to temporarily stop the cover 4 in a position covering the photographic lens 2.

According to the camera having the protective cover of the present invention configured in this way, by pressing down the stopper member 17 and sliding the cover to a position covering the photographing lens 2, the photographing lens 2 and the objective lens of the finder can be removed. 3, eye aid lens 3a
and forehead.

The light receiving window 15 is completely covered, protecting it and preventing dust from entering from outside. When the protective cover 4 is slid in the longitudinal direction of the camera body 1 to a position where the photographic lens 2 is exposed, a part of the inner end surface engages with the stopper member 17 and the protective cover 4 is opened. Since the film winding knob 10 is stopped at this position, the film winding knob 10 is covered and becomes inoperable, and the photographing lens 2, objective lens 3, bush eye lens 3a, and light receiving window 1 are
5 is completely exposed and the camera is set to shooting mode. As described above, according to the present invention, when the protective cover is moved to a position where the photographing lens is exposed, it covers the film winding knob and disables the operation of the knob. It is possible to provide a camera having a protective cover for a photographic lens which eliminates the fear of erroneous operation and is extremely convenient to use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a camera having a protective cover for a photographic lens according to an embodiment of the present invention, and FIG. FIG. 3 is a perspective view of the camera shown in FIG. FIG. 4 is a vertical sectional view of the camera shown in FIG. 1, and FIG. 5 is a perspective view showing the camera in the opened state.
FIG. 3 is an enlarged front view of a stopper member of the protective cover. 1...Camera body, 2...Photographing lens, 3, 3a... Finder lens, 4...Skin/protective cover, 4a...
...Front plate, 4c... Rear plate, 5...
Camera body, 5a... Front wall, 6... Decorative top plate, 10... Film winding knob, 18...
...Guide slot, 19...Screw, 23...
・Storage hole. Labor too' l Fig. 2 fig. Rare 3 fig. Oni 4 fig. 'Rare 5 fig.

Claims (1)

[Claims] 1. A protective cover is formed by bending a thin plate along the front, top, and top of the back of the central part of the camera body so as to cover a part of the front, top, and top of the back of the camera body; Place the cover in a position that covers the photographic lens located approximately in the center of the front of the camera body, and in a position that exposes the photographic lens from this position, so that it does not protrude to the sides of the camera body in the longitudinal direction of the camera body. means for attaching it to the camera body so that it can slide within a range; and a means for rewinding the film, which is covered by the protective cover and becomes inoperable when the protective cover slides to a position where the photographic lens is exposed. A camera having a protective cover for a photographic lens, comprising: a knob;