JP2000019603A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive and lightweight camera having strength and rigidity enough to maintain the operation accuracy of a lens barrel and without damaging a photographic film. SOLUTION: Since the whole of the camera body including a lens barrel holding part 40a is integrally molded of glass fiber reinforced plastic(GFRP), the inexpensive and lightweight body 3 in which the operation accuracy of the lens barrel is highly maintained, can be obtained. Since a rail surface frame 15 is molded of a resin which does not include glass fiber without using the glass fiber reinforced plastic(GFRP) as the body 3, the emulsion surface of the photographic film is not damaged even when it travels a film path 14 while it is brought into contact with a projected line 15b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly, to a camera material.

[0002]

2. Description of the Related Art In recent years, APS widely used in general
The photographic film cartridge used in the (Advanced Photo System) has a function of sending the photographic film out of the cartridge body by rotating a spool incorporated in the cartridge body, as disclosed in JP-A-6-301157. . Therefore, when the photographic film cartridge is loaded or unloaded from the camera, there is an advantage that the photographic film can be handled in a state where the photographic film does not come out from the cartridge body at all.

When a 135 type photographic film patrone is loaded into a camera, the back cover for exposing the entire patrone chamber and the film chamber of the camera and the film passage connecting them is opened. Generally, a certain amount of the photo film is drawn from the inserted photo film cartridge, the photo film is guided from the film passage to the film chamber, and then the back cover is closed.

However, in a camera using an APS type photographic film cartridge as described above, the photographic film is sent out of the cartridge body by rotating the spool. Is provided, the photographic film is sent out to the film chamber via the film path only by rotating the spool without opening the film path from the film path to the film chamber and guiding the photographic film.

For this reason, a camera in which an APS-type photographic film cartridge is loaded is provided with an opening in the cartridge chamber so that the photographic film cartridge can be inserted in the axial direction, instead of a back cover that opens the entire back surface. The insertion opening can be opened and closed by a lid member. The back cover, which has conventionally been opened and closed, is fixed to the back of the camera as a part of the wall forming the film passage and the film chamber. I have.

On the inside of the rear cover described above, a rail surface frame formed integrally with a rail for supporting the exposure surface side of the photographic film and an aperture, and a rear surface of the photographic film facing the rail surface frame. A supporting film support plate is screwed to the camera body. Then, the photographic film passes between the rail surface frame and the film support plate, and is exposed at the position of the rail surface frame.

On the other hand, in the case of a zoom camera, a lens barrel holding portion for holding a lens barrel provided with a photographic lens so as to be able to move forward and backward is provided on the subject side of the rail surface frame. The lens barrel holding section is usually formed as a main body section in which a cartridge chamber for storing a photo film cartridge and a film chamber for storing a photo film in a roll shape are integrated. Such a main body including the lens barrel holding portion is distorted or maintained in order to maintain the operation accuracy of the stored lens barrel,
It must have strength and rigidity to prevent bending.

On the other hand, if the main body including the lens barrel holding portion is formed of a metal such as stainless steel or steel in order to maintain the operation accuracy of the stored lens barrel, strength and rigidity can be increased. There is a problem that the weight of the entire camera is increased and portability is reduced. Further, in the case of an inexpensive compact camera or the like, if metal is used for the main body, there is a problem in terms of manufacturing cost.

[0009] For this reason, some inexpensive main bodies of zoom compact cameras and the like use glass fiber reinforced plastic (GFRP), which is a resin kneaded with glass fiber for improving material strength. By using this glass fiber reinforced plastic, it is possible to obtain a main body including a lens barrel holding portion having sufficient strength and rigidity to maintain the operation accuracy of the lens barrel, while being inexpensive and lightweight.

For example, in the invention described in Japanese Patent Application Laid-Open No. 8-262559, an extension plane of an exposure frame, wherein a camera body is formed of a resin containing glass fibers and a gate portion through which a photographic film is introduced into the exposure frame. There is described a camera in which a part (gate portion) of a guide portion including a connection corner portion with a resin is formed of a resin containing no glass fiber. Thus, even if the photographic film unwound from the photographic film cartridge comes into contact with the connection corners leading to the film feed path, a part of the guide portion (gate portion) does not contain glass fiber, so the surface of the photographic film can be prevented. Is not damaged.

[0011]

However, in the above-mentioned invention, since only the gate portion leading to the film feed path is formed of a resin containing no glass fiber, the gate moves through the film feed path via the connection corner. The photo film is
There is a possibility that the film may be damaged by glass fibers contained in the resin forming the film feed path, which is a problem.

The present invention has been made to solve such problems, and has sufficient strength and rigidity to maintain the operation accuracy of the lens barrel, and does not damage the photographic film. An object is to provide an inexpensive and lightweight camera.

[0013]

In order to achieve the above object, according to the present invention, there is provided a main body unit integrally formed with a lens barrel holding portion to which a lens barrel having a photographing lens is attached so as to be able to move forward and backward.
In a camera having a rail attached to the rear side of the lens barrel holding unit and supporting a light exposure surface side of the photographic film and a rail surface frame integrally formed with an aperture, the main body is made of glass fiber reinforced plastic ( GFRP), and the rail surface frame is formed of a resin containing no glass fiber.

[0014]

FIG. 2 is an external perspective view of a camera according to the present invention, and FIG. 1 is an exploded perspective view showing a main body of FIG. The camera 2 of the present invention roughly includes a main body 3, an outer cover 5 that covers the main body 3, and a lens barrel 30.

The main body 3 is provided with a well-known shutter device (not shown), a lens barrel 30 having a photographing lens 6, a finder 7, a strobe device 8, and the like. A lens barrel holding section 40 having a screw 40a on the inner surface is formed at the center of the main body 3. The lens barrel 30 having the photographing lens 6 is movably mounted inside the lens barrel holding portion 40 by engaging with the screw 40a. A cartridge chamber 11 and a film winding chamber 12 are integrally formed on both sides of the lens barrel holding section 40, respectively. On the rear side of the camera 2, the lens barrel 30 housed in the lens barrel holding unit 40 is provided.
Is provided.

The whole body 3 including the lens barrel holder 40 is made of glass fiber reinforced plastic (GFRP).
And are integrally formed. By molding the main body 3 including the lens barrel holding section 40 from glass fiber reinforced plastic, it is possible to obtain an inexpensive and lightweight main body 3 having the same strength and rigidity as those formed from a metal such as stainless steel or steel. Obtainable. Therefore, the main unit 3 including the lens barrel holding unit 40
Is not distorted or bent, and the operation accuracy of the lens barrel 40 can be maintained high.

FIG. 3 is a partial sectional view of the main body. A photo film cartridge 31 is stored in the cartridge chamber 11. The photo film cartridge 31 includes a cartridge body 32 and a photo film 33 stored in the cartridge main body 32. A spool 34 is rotatably incorporated inside the cartridge body 32, and a photographic film 33 is wound around the rear end thereof.

A light-shielding lid 35 is rotatably attached to the film entrance of the cartridge body 32. Then, by rotating the spool 34, the photo film 33 is fed out from the film entrance 35.

On the lower surface of the camera 2, a cartridge chamber cover 45 for inserting and removing the photographic film cartridge 31 is mounted. An operation lever 46 for opening the cartridge chamber cover 45 is provided on a side surface of the main body 3.

On the back side of the lens barrel holder 40 of the main body 3,
A rail surface frame 15 and a film support plate 16 provided to face the rail surface frame 15 are attached, and a film passage 14 through which a photographic film 33 travels is provided between the rail surface frame 15 and the film support plate 16. It is formed.

At the center of the rail surface frame 15, a rectangular opening is provided to form an aperture 15a. Two parallel ridges 15b are provided along two sides of the aperture 15a. These two parallel ridges 15b
Holds both ends of the photo film 33 from the front side,
The friction of the photographic film 33 running in the film passage 14 is reduced, and the photographic film 33 moves smoothly. An opening 1 into which a sensor (not shown) for detecting the perforation of the photo film 33 is inserted at the end.
5c is provided.

Since such a rail surface frame 15 is formed of a resin containing no glass fiber without using glass fiber reinforced plastic (GFRP) as in the case of the main body 3, the emulsion of the photographic film 33 is used. Even if the film runs on the film passage 14 while the surface is in contact with the ridge 15b, the glass surface is not contained in the rail surface frame 15, so that the emulsion surface of the photographic film 33 is not damaged.

The film support plate 16 has screw holes 16 at the four corners.
It is screwed to the main body 3 so as to cover the rail surface frame 15 with c. An inner surface of the film support plate 16 has an aperture 15a on the back side of the photographic film 33 in the film passage 14.
Are provided integrally with each other, and an opening 16b is provided at an end of the projection 16a, into which a sensor (not shown) for detecting the perforation of the photographic film 33 is inserted. .

At the center of the film winding chamber 12, there is provided a winding shaft 18 having a built-in motor. A film take-up chamber cover 19, which forms a part of the outer wall of the film take-up chamber 12, is attached to the rear side of the film take-up chamber 12 by screws 20 b. Inside the film winding chamber cover 19, a film passage 1 is provided.
A roller 21 for pressing the photographic film 33 fed through 4 toward the take-up shaft 18 is attached. For this reason, the roller 21 is urged in the direction of the winding shaft 18 by a coil spring (not shown).

The photographic film 33 fed through the film passage 14 is pressed against the take-up shaft 18 by the roller 21, and is wound around the take-up shaft 18 as a film roll 33a by the rotation of the take-up shaft 18. Can be

An outer cover 5 covering the main body 3 has a lens barrel 3
An opening for exposing the camera, the finder 7, the strobe device 8 and the like is provided. A release button 23 is integrally provided above the outer cover 5, and a liquid crystal display (not shown) is provided on the back side. ) Is provided.

The operation of the embodiment having the above configuration will be described. Since the entire body of the camera 2 of the present invention including the lens barrel holding unit 40 is integrally formed and glass fiber reinforced plastic (GFRP) is used as the material thereof,
An inexpensive and lightweight main body 3 that maintains the operation accuracy of the lens barrel 40 high can be obtained.

On the other hand, the entire rail surface frame 15 including the connection corner where the photographic film 33 fed out from the photographic film cartridge 31 is introduced into the film passage 14 is made of glass fiber reinforced plastic (GFR) like the main body 3.
Since P) was not used and was molded with a resin that did not contain glass fiber, it was compared with a conventional camera in which only the gate portion that leads to the film feed path was formed of a resin that did not contain glass fiber. When the film moves in the film passage, there is no possibility that the glass fiber is damaged by the glass fiber, so that damage by the glass fiber at the time of feeding the film can be surely prevented.

[0029]

As described above in detail, according to the present invention, a main body part integrally formed with a lens barrel holding part to which a lens barrel having a photographic lens is attached so as to be able to move forward and backward, and the lens barrel holding part A main body formed of glass fiber reinforced plastic (GFRP) in a camera having a rail mounted on the rear side of the camera and having a rail supporting the exposure surface side of the photographic film and an rail integrally formed with an aperture. At the same time, since the rail surface frame is formed of a resin containing no glass fiber, it has sufficient strength and rigidity to maintain the operation accuracy of the lens barrel, and is inexpensive and lightweight without damaging the photographic film. A camera can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a camera body according to the present invention.

FIG. 2 is an external perspective view of the camera of the present invention.

FIG. 3 is a partial sectional view of a camera body according to the present invention.

[Explanation of symbols]

 2 Camera 3 Main unit 5 Outer cover 12 Film take-up chamber 14 Film passage 15 Rail face frame 16 Film support plate 18 Take-up shaft 19 Film take-up chamber cover 21 Roller 31 Photo film cartridge 33 Photo film

Claims (1)

[Claims] 1. A main body in which a lens barrel holding portion to which a lens barrel having a photographing lens is attached to be able to move forward and backward is integrally formed, and a main body portion is attached to a rear side of the lens barrel holding portion. A camera having a rail to support and a rail surface frame formed integrally with an aperture, wherein the main body is made of glass fiber reinforced plastic (GFRP)
A camera characterized in that the rail surface frame is formed of a resin containing no glass fiber.