JPH07209742A - Camera - Google Patents

Abstract

PURPOSE:To effectively utilize space by arranging a film cartridge housing chamber, an aperture and a film take-up means at different positions from the back of a photographing optical system. CONSTITUTION:A light beam passing through a photographing lens 2 from a subject is reflected to the side by a 1st reflecting member 3 arranged in front of a spool chamber 4 in a camera main body 1 at the rear of the lens 2. Furthermore, the light beam reflected by the member 3 is reflected backward by a 2nd reflecting member 7 arranged nearly in the center part of a camera main body 1. The light beam reflected by the members 3 and 7 passes through an image plane mask 5 provided between the spool chamber 4 and the cartridge chamber 6 and exposes film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the arrangement of internal mechanisms in a camera.

[0002]

2. Description of the Related Art Conventionally, various inventions and ideas have been made in order to reduce the size and weight of a camera itself. That is, in a conventional camera, an aperture that defines the screen exposed on the film is provided behind the photographing optical system,
The layout was such that a film cartridge storage chamber and film winding means were provided on both sides of the aperture.
It has been proposed to reduce the size of the entire camera by appropriately laying out the three units of the film cartridge storage room, the aperture, and the film winding means.

For example, in the camera disclosed in Japanese Patent Laid-Open No. 4-30137, a film take-up spool, which is a film take-up means, is arranged on the back cover side of the camera, and is used as a cartridge chamber in the camera body. The opposite side surface is omitted.

Further, in the camera disclosed in Japanese Utility Model Laid-Open No. 4-164441, the width of the camera is reduced by bringing a spool chamber for accommodating a spool for film winding close to the side wall of the mirror box.

[0005]

However, in the camera described in Japanese Patent Laid-Open No. 4-30137, the mechanism becomes complicated, and the thickness of the back cover is larger than that of a normal camera. It turned out to be. Further, in the camera described in Japanese Patent Application Laid-Open No. 4-30137, the cartridge storage chamber is arranged in the grip portion gripped by the photographer, but the entire space inside the grip is effectively utilized. That was not the case.

Further, in the camera described in Japanese Utility Model Laid-Open No. 4-164441, there is a limit to the movement of the spool chamber inward, so that it is impossible to expect a drastic downsizing.

A camera adopting such a layout accommodates a small film patrone which has good portability and storability as compared with the size of a conventional film patrone as disclosed in Japanese Patent Laid-Open No. 5-257234. However, there is a limit to miniaturization.

The present invention has been made in view of the above problems, and a camera which effectively utilizes the space by arranging the film cartridge storage chamber, the aperture, and the film winding means at positions different from the rear of the photographing optical system. The purpose is to provide.

[0009]

That is, the present invention is directed to a photographing optical system provided in a camera body, and a subject light which is provided in the camera body and which has passed through the photographing optical system to a side in the camera body. First bending means for bending the camera body, and second bending means provided in the camera body for bending the subject light bent by the first bending means backward in the camera body, Mask means provided behind the second bending means in the camera body for defining the size of the subject light exposed on the film surface, and on both sides of the mask means in the camera body. It is characterized by comprising a film cartridge storage chamber and a film winding means arranged.

[0010]

In the camera of the present invention, the camera body is
A photographing optical system and a first bending unit that bends the subject light that has passed through the photographing optical system to the side in the camera body are provided. Further, in the camera body, there is provided a second bending means for bending the subject light bent by the first bending means toward the rear in the camera body. Further, behind the second bending means in the camera body, there is provided mask means for defining the size of subject light exposed on the film surface. A film cartridge storage chamber and a film winding means are arranged on both sides of the mask means in the camera body.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a first embodiment of the present invention and shows a schematic configuration of a camera. In the figure, when the camera is viewed from the front side, a taking lens 2 is attached to the right side of the front surface of the camera body 1. In the camera body 1, behind the taking lens 2, a first reflecting member 3 for reflecting the subject light passing through the taking lens 2 and a spool chamber 4 accommodating a spool for winding a film (not shown).
Are arranged.

A screen mask 5 is provided on the left side of the spool chamber 4 in the camera body 1, that is, at the center. Further, on the left side of the screen mask 5, a cartridge chamber 6 for accommodating a film cartridge is arranged. Further, in front of the screen mask 5, a second reflecting member 7 that further reflects the subject light reflected by the first reflecting member 3 is provided.

In such a structure, the light ray from the subject (not shown) that has passed through the taking lens 2 is reflected laterally by the first reflecting member 3 in the camera body 1, and then the second light is reflected. The light is reflected backward by the reflecting member 7. Then, the light reflected by the first and second reflecting members 3 and 7 passes through the screen mask 5 to expose a film (not shown).

With this structure, the taking lens can be brought closer to the end of the camera, and a space for gripping can be secured. FIG. 2 is a second embodiment of the present invention and shows the structure of a viewfinder type single-lens reflex camera. 2 (a) to 2 (d) show the observation state of the same embodiment.
2A is a top view, FIG. 2B is a perspective view, FIG. 2C is a front view, FIG. 2D is a right side view, and FIG. 2E is a front view in a photographing state. .

When the camera is viewed from the front side, on the right side of the front surface of the camera body 8, there is a taking lens 9 which constitutes a taking optical system.
Is installed. Inside the camera body 8, the shooting lens 9
A first mirror 10 which constitutes a first bending means for reflecting the light rays that have passed through the taking lens 9 and a spool chamber 11 which houses a spool for winding a film (not shown) are arranged behind .

A screen mask 12 is provided on the left side of the spool chamber 11 in the camera body 8, that is, at the center. Further, on the left side of the screen mask 12, a cartridge chamber 13 for accommodating a film cartridge is arranged.

Further, in front of the screen mask 12, there is provided a second mirror 14 for reflecting the light beam reflected by the first mirror 10 further backward and constituting a second bending means. A third mirror 15 that reflects the light beam reflected by the first mirror 10 upward is provided between the second mirror 14 and the first mirror 10. As will be described later, the third mirror 15 is adapted to be flipped up during shooting.

A fourth mirror 16 is arranged above the third mirror 15. And this fourth mirror 16
And a fifth mirror 1 provided above the first mirror 10.
Reference numeral 7 is configured to further reflect the light beam reflected by the third mirror 15 and guide it to the eyepiece lens 18.

On the other hand, on the left side of the camera body 8, a stroboscopic light emitting section 19 is provided. A strobe condenser 20 is disposed below the stroboscopic light emitting portion 19 and in front of the cartridge chamber 13.
Further, a battery 21 is arranged on the right side of the capacitor 20 and in front of the second mirror 14.

In the embodiment, a stroboscopic light emitting portion 19 is provided on the grip side outside the camera body 8,
In order to prevent the finger from being hidden, a protrusion 22 for preventing the finger from being caught is formed at the lower part of the light emitting portion to prevent the finger from being caught.

In such a structure, an observation state and a photographing state will be described. First, the observation state will be described. A light beam from a subject (not shown) that has passed through the taking lens 9 is reflected laterally by the first mirror 10. This light beam is directed upward by the third mirror 15 and laterally by the fourth mirror 16.
The fifth mirror 17 sequentially reflects the light backward, and the eyepiece lens 18
You can see the upright image by enlarging it.

In the second embodiment, a polo type erecting optical system using a mirror is used, but another optical system such as a relay type may be used. Further, even with the same polo type, a part of the reflecting surface may be constituted by a glass or plastic prism. When a prism is used, at least one of the entrance surface and the exit surface may not be a flat surface and may be configured as a part of the finder optical system. Furthermore, a finder optical system may be configured by disposing optical components such as a screen and a lens at least at one place between the reflecting surfaces.

Next, the photographing condition will be described. In the shooting state, the third mirror 16 is retracted above the optical path as shown in FIG. This third mirror 16
In the state where is retracted, the light rays that have passed through the taking lens 9 are
After being reflected by the first mirror 10, it is reflected backward by the second mirror 14. Then, the film (not shown) is exposed through the screen mask 12.

Although not shown in the second embodiment, it is common to arrange a focal plane shutter in front of the screen mask 12 to control the exposure time. The arrangement of the cartridge chamber and the spool chamber may be reversed with the screen mask 12 interposed therebetween.

Furthermore, although the mirror is used in the second embodiment, at least one of them may be glass or prism. In addition, in the case of a prism, the incident surface or the exit surface may be other than a flat surface to form a part of the photographing optical system. Further, in either case of using a mirror or a prism, a photographic optical system is provided by arranging a filter or a lens between at least one of the first reflecting surface and the second reflecting surface or between the second reflecting surface and the screen mask. May form a part of.

With this structure, the taking lens can be brought close to the end of the camera. Therefore,
A wide space for gripping can be provided on the side of the taking lens, and the holding property of the camera can be improved.

Next, a third embodiment of the present invention will be described. 3A and 3B show the configuration of a camera using a finder optical system independent of the taking lens. FIG. 3A is a top view, FIG. 3B is a perspective view, and FIG. 3C is a front view. Figure, Figure 3
(D) is a right side view.

Looking at the camera from the front side, the camera body 23
On the right side of the front surface of the photographic lens, a photographic lens 24 constituting a photographic optical system is attached. Inside the camera body 23, behind the taking lens 24, a prism 25 that reflects the light rays that have passed through the taking lens 23 and a spool chamber 26 that houses a spool (not shown) for winding a film are arranged.

A screen mask 27 is provided in the camera body 23 on the left side of the spool chamber 26, that is, in the center. Further, on the left side of the screen mask 12, a cartridge chamber 28 for accommodating a film cartridge is arranged. The arrangement of the cartridge chamber 28 and the spool chamber 26 may be left and right with the screen mask 27 interposed therebetween.

Above the cartridge chamber 28,
A stroboscopic light emitting unit 29 and a battery 30 are arranged respectively. A finder 31 is arranged above the screen mask 27, and a strobe condenser 32 is arranged above the spool chamber.

In the third embodiment, the camera body 2
The stroboscopic light emitting portion 29 is provided on the grip side of No. 3, and in order to prevent the stroboscopic light from being hidden by the finger, the periphery of the light emitting portion is formed in a slightly convex shape to prevent finger catching.

The finder 31 may be a virtual image type or a real image type as long as it is independent of the taking lens 23. Next, the shooting state of the camera having such a configuration will be described.

Since this camera uses a finder optical system independent of the taking lens, the subject (not shown)
The light rays from are guided to the photographer's eyes through the finder 31. At the same time, the light beam from the subject that has passed through the taking lens 24 is reflected by the first reflecting surface 25a of the prism 35.
The light is reflected sideways at, and then is reflected backward at the second reflecting surface 25b. The light rays reflected in this way are reflected by the screen mask 2
The film (not shown) is exposed through 7.

Although not shown in the same embodiment, the shutter is generally incorporated in the photographing lens to control the exposure time. With this configuration, the taking lens can be brought close to the end of the camera. Therefore, a wide space for the grip can be obtained, and the holding property of the camera can be improved.

In the third embodiment, the reflecting surface is formed of the integrally molded prism, but it may be formed of a mirror as in the first and second embodiments described above. Alternatively, a separate prism or a combination of a mirror and a prism may be used. Furthermore, a prism or an optical component arranged between them may be configured as a part of the taking lens.

As described in detail above, according to the embodiment of the present invention, the following constitution can be obtained. That is, (1) a photographing optical system provided in the camera body, and a first reflecting mirror provided in the camera body and laterally reflecting the subject light that has passed through the photographing optical system in the camera body. A second reflection mirror provided in the camera body for reflecting the subject light reflected by the first reflection mirror backward in the camera body; and a second reflection mirror in the camera body. Installed behind the reflective mirror of
A mask means for defining the size of the subject light to be exposed on the film surface, a film cartridge storage chamber and a film winding means arranged on both sides of the mask means in the camera body. Characteristic camera.

(2) Photographing optical system provided in the camera body, and first bending means provided in the camera body for laterally bending the subject light passing through the phototaking optical system in the camera body. Second bending means provided in the camera body for bending the subject light bent by the first bending means toward the rear in the camera body, and the second bending means in the camera body. A mask means provided behind the second folding means for defining the size of the subject light exposed on the film surface; a film cartridge storage chamber arranged on both sides of the mask means in the camera body; A camera comprising a film winding means, wherein the first bending means and the second bending means are each formed by a reflecting surface of a prism.

(3) In the above (2), the first bending means and the second bending means are each formed by two reflecting surfaces of a single prism. (4) In (3) above, at least one of the two reflecting surfaces of the prism contributes to the imaging action of the subject light.

(5) Photographing optical system provided in the camera body, and first bending means provided in the camera body for laterally bending the subject light passing through the phototaking optical system in the camera body. Second bending means provided in the camera body for bending the subject light bent by the first bending means toward the rear in the camera body, and the second bending means in the camera body. And a mask means provided behind the second bending means and defining the size of the subject light exposed on the film surface. The first bending means and the second bending means are mirrors and prisms. A camera characterized by being formed by a combination of reflective surfaces of.

(6) Photographing optical system provided in the camera body, and first bending means provided in the camera body for laterally bending the subject light passing through the phototaking optical system in the camera body. Second bending means provided in the camera body for bending the subject light bent by the first bending means toward the rear in the camera body, and the second bending means in the camera body. A mask means provided behind the second bending means and defining the size of the subject light exposed on the film surface, between the first bending means and the second bending means, or A camera characterized in that an optical member is disposed between at least one of the second bending means and the mask means.

(7) In (6) above, the optical member is an optical lens or an optical filter. (8) A photographic optical system provided in the camera body, a first bending means provided in the camera body for laterally bending subject light passing through the photographic optical system in the camera body, Second bending means provided in the camera body for bending the subject light bent by the first bending means toward the rear in the camera body, and the second bending means in the camera body. It is characterized in that it is provided with mask means provided behind the means for defining the size of subject light exposed on the film surface, and finder means capable of observing the subject image exposed on the film surface. camera.

(9) In the above (8), the finder means forms a single-lens reflex finder capable of observing the subject light by guiding the light which has passed through the photographing optical system. .

(10) In the above (9), the first and second bending means guide the subject light to the finder means by being retracted into the optical path. (11) In the above (8), the finder means is an optical system independent of the photographing optical system.

[0044]

As described above in detail, in the first aspect of the invention, the mask means is arranged at a position displaced from the rear of the photographing optical system, and the film cartridge storage chamber and the film winder are arranged on both sides thereof. Means for arranging means for guiding the subject light passing through the photographing optical system to the mask means.
By providing the bending means, it is possible to reduce the size of the camera as a whole and to increase the space required for gripping, so that it is possible to obtain a camera having a high holding property.

Further, according to the first aspect of the invention, since the subject light that has passed through the photographing optical system is bent at two places,
The optical path length after passing through the photographic optical system can be increased, and the focal length and magnification of the photographic optical system, that is, the amount of change in the focal length can be increased. It is possible to obtain a camera having the taking optical system of.

Further, in the second invention, in the first invention, one of the film cartridge storage chamber and the film winding means is arranged behind the first bending means. It is possible to obtain a camera whose width does not increase carelessly.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a camera according to a first embodiment of the present invention.

FIG. 2 shows the configuration of a viewfinder type single-lens reflex camera according to a second embodiment of the present invention,
(A) is a top view showing an observation state, (b) is a perspective view showing the observation state, (c) is a front view showing the observation state,
(D) is a right side view showing an observation state, and (e) is a front view of a photographing state.

3A and 3B are diagrams showing a configuration of a camera using a finder optical system independent of a taking lens in a third embodiment of the present invention, (a) is a top view, (b) is a perspective view, c) is a front view and (d) is a right side view.

[Explanation of symbols]

1, 8 ... Camera body, 2, 9 ... Photographing lens, 3 ... First reflecting member, 4, 11 ... Spool chamber, 5, 12 ... Screen mask, 6, 13 ... Patrone chamber, 7 ... Second reflecting member 1
0 ... 1st mirror, 14 ... 2nd mirror, 15 ... 3rd mirror, 16 ... 4th mirror, 17 ... 5th mirror, 18 ... Eyepiece, 19 ... Strobe light emission part, 20 ... Condenser,
21 ... Battery, 22 ... Protrusion.

Claims (2)

[Claims] 1. A photographing optical system provided in a camera body, and a first bending means provided in the camera body for laterally bending subject light passing through the photographing optical system in the camera body. Second bending means provided in the camera body for bending the subject light bent by the first bending means toward the rear in the camera body, and the second bending means in the camera body. Mask means provided behind the folding means for regulating the size of the subject light to be exposed on the film surface, and a film cartridge storage chamber and a film arranged on both sides of the mask means in the camera body. A camera comprising: winding means. 2. The camera according to claim 1, wherein one of the film cartridge storage chamber and the film winding means is arranged behind the first bending means.