JPH08160516A - Camera - Google Patents

Abstract

PURPOSE: To prevent the deformation of a rail, even if the stress of a camera is imparted. CONSTITUTION: The camera 1 is provided with a camera main body 2 and a casing 3. The camera main body 2 is composed of bar-like part 22, a first block 23 provided on one end side of the main body 2 and a second block 24 provided on the other end side. The casing 3 is arranged between the first and second blocks 23 and 24 of the main body 2. The sidewalls 3A, 3B of the casing 3 are provided with wing parts 31, 32 respectively and the casing 3 is supported by the blocks 23, 24 of the main body 2 by the wing parts 31, 32. A gap is formed between the main body 2 and the casing 3 and light shielding stepped parts 231, 241, 37, 38, ... are provided in the main body 2 and the casing 3. Inner and outer rails are provided on the rear wall 3c of the casing 3 and a body side mount 7 is fixed on a front wall 3D.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to cameras.

[0002]

2. Description of the Related Art A conventional interchangeable lens camera has a camera body having a cartridge chamber on one end side and a spool chamber on the other end side, and a photographing lens side (front side) of the camera body.
A front plate is installed on the front plate, and a mount for detachably mounting the lens barrel of the taking lens is fixed to the front surface of the front plate. A pair of inner rails and a pair of outer rails for film positioning are provided on the back side of the camera body.

However, in the conventional camera described above, the rail for positioning the film is provided in the camera body. Therefore, when stress is applied to the camera body and the camera body is deformed, the rail is deformed (distorted) in response to the deformation. However, there is a problem that the flange back size changes and the flatness of the film surface is impaired.

That is, since the cartridge chamber, the spool chamber, the mount, the inner rail and the outer rail are composed of a single block, the lens barrel of the photographic lens (especially the lens barrel of the photographic lens having a large aperture) is mounted on the mount. However, when the load of the lens barrel is applied to the mount, the strain due to the load is transmitted to the rail and the rail is deformed, which changes the flange back dimension and the flatness of the film surface regulated by the rail. Is lost.

Further, when attaching the camera to a tripod, the bottom of the camera body is fixed to the tripod with a tripod screw. At this time, if the tripod screw is tightened too much, the camera body is deformed, As a result, the rail is deformed, the flange back dimension is changed, and the flatness of the film surface is lost.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a camera having a stable flange back dimension even when stress is applied to the camera.

[0007]

The above objects are achieved by the present invention described in (1) to (6) below.

(1) A camera body provided with a first block forming a cartridge chamber and a second block forming a spool chamber, and provided between the first block and the second block, A camera having a housing provided with a supporting portion for supporting a lens barrel of a taking lens on a front surface,
A camera characterized in that a rail for positioning a film is provided on the back surface of the case.

(2) The camera body has a pair of rod-shaped portions connecting the first block and the second block, and the rod-shaped portions are arranged to face each other via the rail. The camera according to (1).

(3) The camera according to (1) or (2), wherein a wing portion is formed on the casing, and the casing is supported by the camera body by the wing portion.

(4) The camera according to any one of the above (1) to (3), wherein a gap capable of absorbing deformation of the camera body is provided between the camera body and the casing.

(5) The camera according to any one of the above (1) to (4), wherein a step portion for light shielding is provided on the camera body and the casing.

(6) The camera according to any one of the above (1) to (5), wherein a shutter unit is arranged on the inner rear surface side of the casing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The camera of the present invention will be described below in detail with reference to the preferred embodiments shown in the accompanying drawings. 1, 2, and 3 are a cross-sectional plan view (transverse cross-sectional view), a rear view, and a cross-sectional side view (longitudinal cross-sectional view), respectively, showing an embodiment of a camera of the present invention. As shown in FIG. 1, the camera 1 is a lens-replaceable single-lens reflex camera (a camera having a viewfinder of the TTL system), and has a camera body 2 and a housing 3.

As shown in FIGS. 1 and 2, the camera body 2 of the camera 1 is composed of a pair of rod-shaped portions 21 and 22, a first block 23, and a second block 24. The first block 23 and the second block 24 are
The rod-shaped portions 21 and 22 are arranged on one end side (left side in FIG. 1) and the other end side (right side in FIG. 1) of each, and are connected to each other by the rod-shaped portions 21 and 22. First block 2
A cartridge chamber 4 is formed in the second block 2
A spool chamber 5 and a battery chamber 6 are respectively formed in 4. A spool 51 for winding the film is installed in the spool chamber 5 of the second block 24.

As shown in FIG. 2, the rod-shaped portion 21 and the rod-shaped portion 22 of the camera body 2 are arranged in parallel to each other with an inner rail 33 and an outer rail 34 described later interposed therebetween. As shown in FIG. 3, grooves 211 and 2 are formed on the back surfaces of the rod-shaped portions 21 and 22 along the longitudinal direction thereof, respectively.
21 is provided. These grooves 211 and 221
When the back cover (not shown) is closed, each of them can be fitted with a wall portion provided upright along the edge of the back cover, thereby shielding the inside of the camera 1 from light. It

Further, on the front faces of the rod-shaped parts 21 and 22,
As a step portion for shading, a ridge 2 is formed in the longitudinal direction of each step portion.
12 and 222 are provided. These ridges 21
2 and 222 are grooves 35 of the housing 3, which will be described later.
It can be engaged with the rear wall 3C provided with and 36 through a predetermined gap.

As shown in FIG. 1, the wall portion 2 of the camera body 2
Steps 231 and 241 for light shielding are provided on inner surfaces of the wall 3 and the wall 24 that face each other. These step portions 231 and 241 can engage with step portions 37 and 38 provided on a side wall 3A of the housing 3 described later, respectively, with a predetermined gap therebetween.

The housing 3 of the camera 1 is the first body of the camera body 2.
The block 23 and the second block 24 are arranged. FIG. 4 is a front view showing a configuration example of the housing 3 of the camera 1. As shown in FIGS. 1 and 4, plate-shaped wings (flange) 31 and 32 are provided on the outer surfaces of the side walls 3A and 3B of the housing 3, respectively.
Are supported on the first blocks 23 and 24 of the camera body 2 by the wings 31 and 32. In this case, the first block 23 and the wing portion 31 are fixed by the screw 14 at two places, and similarly, the second block 24 and the wing portion 32 are fixed by the screw 14 at two places. There is.

5 and 6 are an enlarged view showing the wing portion 31 of the housing 3 in FIG. 1 and its vicinity, and an enlarged view showing the rod-like portion 21 of the camera body 2 in FIG. 3 and its vicinity, respectively.

As shown in FIG. 5, a gap 12 is provided between the first block 23 of the camera body 2 and the side wall 3A of the housing 3, and similarly, a second block of the camera body 2 is provided. A gap 12 is also provided between 24 and the side wall 3B of the housing 3. The gap 12 absorbs deformation of the camera body 2 when stress is applied to the camera body 2, and when stress is applied to the housing 3 such as when a load is applied to the body side mount 7. In addition, the housing 3 functions so as to change its posture with respect to the camera body 2. Both these gaps 1
The size of 2 is not particularly limited, but in the present embodiment, for example,
It may be about 0.2 to 0.3 mm.

Further, as shown in FIG. 6, a gap 13 is provided between the rod-shaped portion 21 of the camera body 2 and the rear wall 3C of the housing 3, and similarly, the rod-shaped portion 22 of the camera body 2 is provided. A gap 13 is also provided between and the rear wall 3C of the housing 3.
Like the gap 12, the gap 13 also functions to absorb the deformation of the camera body 2 and to change the posture of the housing 3 with respect to the camera body 2. The size of these gaps 13 is not particularly limited, but in this embodiment, for example, 0.1.
It may be about mm.

As described above, the housing 3 of the camera 1 has the wing portion 31.
And 32 are supported by the camera body 2 and a gap is provided between the camera body 2 and the housing 3. Therefore, in order to prevent light leakage from the gap, the camera body 2 and the housing 3 have A step portion for shading is provided. Hereinafter, this light shielding step will be specifically described.

As shown in FIGS. 1 and 5, light shielding steps 37 and 38 are provided on the outer surfaces of the side walls 3A and 3B of the housing 3, respectively. These step portions 37 and 38 are the step portion 231 and the second block 24 provided in the first block 23 of the camera body 2, respectively.
It is engaged with the stepped portion 241 provided in the camera via a predetermined gap, which prevents light from leaking into the camera 1.

Further, as shown in FIGS. 3 and 6, a pair of grooves 35 and 36 are provided on the outer surface of the rear wall 3C of the housing 3 as a step portion for shielding light. On the rear wall 3C, in the grooves 35 and 36, a ridge 212 provided on the rod 21 of the camera body 2 and a ridge 222 provided on the rod 22 are engaged with each other with a predetermined gap. Therefore, light leakage to the inside of the camera 1 is prevented.

As shown in FIG. 2, an opening 15 is provided in the rear wall 3C of the housing 3 at substantially the center thereof, thereby forming a screen frame. A pair of inner rails 33 and a pair of outer rails 34 are provided on the outer surface of the rear wall 3C of the housing 3. In this case, the outer rail 34 is the inner rail 3
It is formed higher than 3. The inner rail 33 and the outer rail 34 are respectively the rod-shaped body 21 of the camera body 2.
And the rod-shaped body 22. Outer rail 3
Reference numeral 4 guides the conveyance of a film (not shown) and regulates the position of the film in the width direction (vertical direction). Further, the inner rail 33 regulates the position of the film in the front-rear direction and corrects the curve in the width direction of the film by a gap formed between the inner rail 33 and the pressure plate (not shown).

As shown in FIG. 4, a body side mount 7 is fixed to the front surface of the front wall 3D of the housing 3. A lens side mount (not shown) provided on the lens barrel of the taking lens is detachably attached to the body side mount 7. In this case, the body side mount 7 functions as a support portion that supports the lens barrel of the taking lens. In addition, on the surface of the body side mount 7, a plurality of terminals 71 that are connected to the terminals of the mounted lens side mount are provided.

Further, the bottom wall of the housing 3 is provided with a hole for connection with a shutter charge mechanism (not shown),
A hole is provided on the upper wall (wall facing the bottom wall) of the housing 3 so that a pentaprism or the like of a finder optical system (not shown) can be installed.

A light-shielding member (light-shielding plate) is provided on the inner side surface of the housing 3 as described above. Further, as shown in FIG. 1, in the housing 3, a mirror box 8 and a shutter unit 9 are provided.
Are installed respectively. In this case, the mirror box 8 is arranged in the central portion of the housing 3, and the shutter unit 9 is arranged on the rear surface side (the rear wall 3C side) of the housing 3.

As described above, since the inner rail 33 and the outer rail 34 are formed on the back surface of the housing 3, the inner rail 33 and the outer rail 34 are arranged on the back surface of the housing 3 by arranging the shutter unit 9 on the inner back surface side. 33 and the outer rail 34 and the shutter unit 9 can be integrated.

As shown in FIG. 3, a first mirror 11 and a second mirror (not shown) are installed in the mirror box 8. A part of the incident light from the taking lens is reflected by the first mirror 11 and guided to a finder optical system (not shown) provided above the camera. When a release switch (not shown) is turned on, the first mirror 11 jumps up, and the shutter unit 9 and the like are activated to take a picture, that is, to expose the film.

Next, the operation of the camera 1 described above will be described. As shown in FIG. 1, when the lens side mount of the taking lens is attached to the body side mount 7 of the camera 1, a load is applied to the body side mount 7. The housing 3 is
Since the camera body 2 is supported by the wings 31 and 32 and a gap is provided between the camera body 2 and the housing 3, the wings 31 and 32 are deformed by the load on the body side mount 7, respectively. Then, the housing 3 retains its shape, and uses the wing portions 31 and 32 as fulcrums to support the camera body 2
Change your posture against. In this case, the stress applied to the body side mount 7 is absorbed by the deformation of the wings 31 and 32, and the inner rail 33 and the outer rail 34 are absorbed.
The inner rail 33 and the outer rail 34 do not deform.

When stress is applied to the camera body 2, for example, when the camera body 2 is deformed due to stress applied to the camera body 2 due to over-tightening of a tripod screw when attaching the camera to a tripod, the housing is deformed. 3 wings 3 and 32
In addition, the deformation between the camera body 2 is absorbed by the gap between the camera body 2 and the housing 3, so that the inner rail 33 and the outer rail 34 do not deform.

As described above, according to the camera 1 of this embodiment,
Since the body-side mount 7, the inner rail 33, and the outer rail 34 are provided in the housing 3 separate from the camera body 2, the inner rail 33 and the outer rail 34 are prevented from being deformed (distorted). The flange back dimension can be stabilized.

That is, in the conventional camera, the rail surface or the like is deformed due to the influence of the load on the body side mount, the influence of strongly tightening the tripod screw on the camera body, the influence of the temperature characteristic due to a different material, and the like. However, in the case of the camera 1 of the present embodiment, as described above, the housing 3 provided with the body side mount 7, the inner rail 33 and the outer rail 34 is the camera. Since it is a separate body from the main body 2 and the housing 3 can maintain its shape simply by changing its posture with respect to the camera main body 2,
The inner rail 33 and the outer rail 34 are not deformed, and the flange back dimension is stable.

Further, in the case 3 separate from the camera body 2,
Since the inner rail 33 and the outer rail 34 are provided, when the rail surface is processed, it is possible to perform the processing and dimension management in the housing block, and thereby, the rail surface processing and the dimension management such as the flange back dimension. Will be easier.

The body side mount 7 is attached to the housing 3.
Since the inner rail 33 and the outer rail 34 are provided, it is possible to eliminate processing, that is, the housing 3 can be integrally molded with resin (plastic) or the like, and thus the camera 1 can be easily manufactured. Becomes Also, the camera body 2
Since the housing 3 is provided with a step portion for shading,
Light leakage from the gap between the camera body 2 and the housing 3 is prevented.

The present embodiment is an interchangeable lens single-lens reflex camera, but the present invention is not limited to this, and various cameras such as a lens-integrated single-lens reflex camera and a compact camera (lens shutter camera). Can also be applied to. The camera of the present invention has been described above based on the illustrated embodiment, but the present invention is not limited to this.

[0039]

As described above, according to the camera of the present invention, the housing, which is separate from the camera body, is provided with the supporting portion for supporting the lens barrel of the photographing lens and the rail for positioning the film. Therefore, the rail can be prevented from being deformed, and the flange back dimension can be stabilized. Therefore, the proper alignment of the film can always be performed.

When the rail surface is processed, the housing block can be processed and its dimensions can be controlled, which facilitates the processing of the rail surface and the dimensions such as the flange back dimension. In addition, the housing is made of resin (plastic)
As a result, the camera 1 can be easily manufactured because it can be integrally molded.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view (cross-sectional view) showing an embodiment of a camera of the present invention.

FIG. 2 is a rear view showing an embodiment of the camera of the present invention.

FIG. 3 is a sectional side view (longitudinal sectional view) showing an embodiment of the camera of the present invention.

FIG. 4 is a front view showing a configuration example of a housing according to the present invention.

5 is an enlarged view showing a wing portion 31 of the housing 3 in FIG. 1 and its vicinity. FIG.

6 is an enlarged view showing a rod-shaped portion 21 of the camera body 2 in FIG. 3 and its vicinity.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 camera 2 camera main body 21,22 rod-shaped part 211,221 groove 212,222 ridge 23 first block 24 second block 231,241 step part 3 housing 3A, 3B side wall 3C rear wall 3D front wall 31, 32 Wing 33 Inner rail 34 Outer rail 35, 36 Groove 37, 38 Step 4 Patrone chamber 5 Spool chamber 51 Spool 6 Battery chamber 7 Body side mount 71 Terminal 8 Mirror box 9 Shutter unit 11 First mirror 12, 13 Gap 14 Screw 15 openings

Claims (6)

[Claims] 1. A camera body provided with a first block forming a cartridge chamber and a second block forming a spool chamber; and a front surface provided between the first block and the second block. A camera having a housing provided with a supporting portion for supporting the lens barrel of the taking lens, wherein a rail for film positioning is provided on the back surface of the housing. 2. The camera body has a pair of rod-shaped portions that connect the first block and the second block, and the rod-shaped portions are arranged to face each other with the rail interposed therebetween. The camera described in 1. 3. The camera according to claim 1, wherein a wing portion is formed on the housing, and the housing is supported by the camera body by the wing portion. 4. A gap that can absorb deformation of the camera body is provided between the camera body and the housing.
The camera according to any one of 1 to 3. 5. The camera according to claim 1, wherein a step portion for light shielding is provided on the camera body and the casing. 6. The camera according to claim 1, wherein a shutter unit is arranged on the inner rear surface side of the casing.