JPH06301093A - Structure for back cover of camera - Google Patents

Abstract

PURPOSE:To restrain the deformation amount of a cartridge presser which is attached to a back cover and shields incident light from a film confirming window and to improve the durability of the cartridge presser by positioning the part of the cartridge presser positioned on the leading edge side of the back cover along a holding wall protrusively provided on the outer peripheral surface of the cartridge chamber of a camera main body. CONSTITUTION:The end side wall part 22b of a housing frame 22 provided around the film confirming window 21 of the back cover 20 is formed to be short and the other part is extended to the cartridge chamber. The part 23a of the cartridge presser 23 on a side nearer to the center of the back cover 20 is positioned inside the central side wall part 22a, and the part 23b on the leading edge side is placed on the end side wall part 22b. The holding wall 15 is protrusively provided on the outer peripheral surface of the cartridge chamber of the camera main body 10 so that the part 23b of the presser 23 on the leading edge side may be positioned along the inside surface of the holding wall 15. Since the base end of the holding wall 15 is proximate to a cartridge 12, the deformation amount of the presser 23 caused by press- crushing is small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back cover of a camera in which a film cartridge containing a film is loaded, and a part of the camera body which is disengaged from the back cover when the back cover is opened and closed. Concerning the structure of.

[0002]

2. Description of the Related Art FIG. 3 shows a relationship between a cartridge chamber and a back cover of a camera having a conventional back cover structure. A cartridge 3 containing a film is loaded in the cartridge chamber 2 of the camera body 1, and the film pulled out from the cartridge 3 loaded in the cartridge chamber 2 passes through the aperture portion 4 on the back surface of the camera body 1 to obtain the aperture portion. Each frame is taken up by a spool in a spool chamber (not shown) provided on the opposite side of the cartridge chamber 2 with 4 between them.
A back cover 5 is openably and closably attached to the camera body 1 by a hinge (not shown).
The inside of the camera is shielded from light by closing. Further, a hook portion 5a that engages with and disengages from a latch portion 1a provided on the outer end portion of the camera body 1 on the side of the cartridge chamber 2 is provided at the tip of the back cover 5.

Then, when the back cover 5 is closed, a part of the back cover 5 which is opposite to the part where the information about the film on the outer surface of the cartridge 3 loaded in the cartridge chamber 2 is printed. A film confirmation window 6 is provided. The film confirmation window 6 is formed by fitting a transparent resin or the like into a through hole formed in the back cover 5. Through the film confirmation window 6, the presence / absence of a film and the number of film shots are loaded. You can check if you are.

A housing frame 7 is provided on the inner surface of the back cover 5 and around the film confirmation window 6, and a frame-shaped cartridge holder 8 made of an elastic material such as sponge rubber is provided on the housing frame 7. It is housed. The patrone retainer 8 is formed in a frame shape so that the film confirmation window 6 is located inside. Then, with the back cover 5 closed, the patrone presser 8 comes into contact with the patrone 3 and is appropriately crushed to press the patrone 3 into the patrone chamber 2 so that the patrone 3 does not rattle when the film is fed. At the same time, the light entering the camera body 1 from the film confirmation window 6 is blocked.

[0005]

However, since the outer surface of the cartridge 3 is arcuate as shown in FIG. 3, the cartridge holder 8 is located near the center of the back cover 5 near the film discharge port. The cartridge 3 is pressed by the flat part of the cartridge 3, but is pressed by the arc-shaped part on the end side of the back cover 5. Therefore, on the end portion side of the back cover 5, the cartridge holder 8 may be largely deformed 8a from the front end portion of the housing frame 7 to the outside, as shown by an imaginary line in FIG. Therefore, the patrone retainer 8 is easily damaged by fatigue, which may cause a problem in durability.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a back cover structure for a camera, which can minimize the amount of deformation and provide a patrone presser with good durability.

[0007]

As a technical means for achieving the above object, the camera back cover structure according to the present invention is provided with information regarding the type of film printed on the outer surface of the cartridge loaded in the camera. In the back cover structure of the camera, which is provided with a film confirmation window for observing from the outside, and a patrone presser is attached to the accommodation frame by being held on the inner peripheral edge of the film confirmation window, an end portion of the back lid of the accommodation frame is provided. The wall portion located on the side is lower than the wall portion located on the central portion side of the case back, a part of the patrone presser is placed on the end side wall portion, and the portion other than the end side wall portion is accommodated. In the wall portion of the frame, the cartridge holder is housed inside the housing frame, and is the end of the camera body on the cartridge chamber side where the cartridge is loaded, and the end of the housing frame when the back cover is closed. Close to the side wall A holding wall is formed at a position, and the side portion of the patrone retainer placed on the end side wall portion when the back lid is closed is positioned along the holding wall, and the outer portion of the holding wall and the back lid are The feature is that the end part can be engaged and disengaged.

[0008]

When the back cover is closed, the patrone retainer comes into contact with the patrone loaded in the patrone chamber to press the patrone and block light incident from the film confirmation window. Further, the patrone presser is located along the holding wall, and since the holding wall is formed in the camera body, the gap between the outer peripheral surface of the patrone and the base end portion of the holding wall becomes small, so that the patrone is pressed by the patrone. The deformation of the Patrone presser becomes smaller.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The back cover structure according to the present invention will be specifically described below with reference to the illustrated embodiments.

FIG. 1 is a partial cross-sectional view showing a state in which the case back 12 is closed without accommodating the cartridge 12 (see FIG. 2) in the cartridge chamber 11 of the camera body 10. A latch portion 10a is provided at the end of the camera body 10 on the side of the cartridge chamber 11, and the latch portion 1a
A partition wall 10b is formed outside 0a. Patrone room
A tongue piece 13 is provided on the back cover 20 side of 11, and the tongue piece 13 is provided.
A through hole 13a having an appropriate size is formed at the center of 13. The tip of the tongue portion 13 extends to a position facing the aperture portion 14 side of the cartridge chamber 11, and the tip portion of the tongue portion 13 and the end portion of the cartridge chamber 11 on the aperture portion 14 side. A film discharge portion 11a is formed.

On the other hand, the base end portion of the back cover 20 is openably and closably supported by the camera body 10 by a hinge structure (not shown), and a hook portion 20a for engaging and disengaging with the latch portion 10a of the camera body 10 is provided at the tip end portion. The inside of the camera body 10 is shielded from light when the back cover 20 is closed and the latch portion 10a is engaged with the hook portion 20a. A film confirmation window 21 is formed on the front end side of the back cover 20. This film confirmation window
21 is formed by inserting a transparent synthetic resin or the like into a through hole formed in the back cover 20, and the inside of the camera body 10 can be observed through the film confirmation window 21.

On the inner surface of the back cover 20 and around the film confirmation window 21, a substantially rectangular housing frame 22 projecting toward the camera body 10 is formed. The wall portion 22a on the center side of the back lid 20 of the housing frame 22 is a state in which the back lid 20 is closed,
The patrone chamber 11 extends into the through hole 13a of the tongue piece 13. Further, the end side wall portion 22b formed of the wall portion on the front end side of the back lid 20 of the housing frame 22 is formed shorter than the wall portion 22a. The portions other than the end side wall portions 22b are formed to have substantially the same height as the central side wall portion 22a. Then, a cartridge holder 23 formed of a sponge rubber or the like into a substantially rectangular frame shape is held by the accommodation frame 22. This cartridge holder 23 is placed on the tip surface of the end side wall portion 22b at the tip end side portion 23b, and in the other portions, the center side wall portion 22a shown in FIG. Like the portion 23a, it is provided along the inside of the housing frame 22.

On the other hand, the latch portion 10 of the camera body 10
At the end where a is provided, a holding wall 15 is projected from the outer surface of the cartridge chamber 11 toward the back lid 20, and the holding wall 15 is closed when the back lid 20 is closed. The tip portion is located between the hook portion 20a of the back cover 20 and the end side wall portion 22b of the housing frame 22. Furthermore, with the back cover 20 closed, the end side wall portion 22 of the patrone retainer 23 is
The outer surface of the portion mounted on b is in a state of being close to and along the inner surface of the holding wall 15.

The operation of the camera back cover structure according to the present invention constructed as described above will be described below.

FIG. 2 is a partial sectional view showing a state in which the cartridge 12 is loaded in the cartridge chamber 11 and the back cover 20 is closed.
When the back lid 20 is closed, the latch portion 10a and the hook portion 20a are engaged with each other, and the camera body 10 is closed by the back lid 20 unless the engagement is released. The film outlet 12a of the cartridge 12 is located in the film discharge portion 11a and is loaded into the cartridge chamber 11, and the roll film drawn out from the film outlet 12a passes through the aperture portion 14,
It is wound on a spool in a spool chamber (not shown) provided on the opposite side of the cartridge chamber 11 with the aperture portion 14 interposed therebetween.

In the state where the back cover 20 is closed, the patrone presser 23 is pressed against the outer peripheral surface of the patrone 12 and crushed. This Patrone foot 23
Since the film is formed in a frame shape around the film confirmation window 21, light incident from the film confirmation window 21 is prevented from entering the inside of the camera body 10 by the patrone presser 23. Further, the portion 23b of the cartridge holder 23 located on the front end side of the case back 20 is located along the inside of the holding wall 15 projecting from the camera body 10 and abuts the case cartridge 12, so that the case back 20 The portion 23a located near the center is inserted into the through hole 13a of the tongue piece 13 and abuts on the cartridge 12.

By the way, the cartridge 12 is a film outlet.
Since 12a has a cylindrical shape extending in the tangential direction,
A portion 23a of the patrone retainer 23 on the side closer to the center of the back cover 20 abuts on a portion which extends in the tangential direction and becomes a substantially flat surface from the vertical direction. On the other hand, the tip side portion 23b of the case back 23 of the cartridge holder 23 is in contact with the outer peripheral surface of the cylinder in a direction not passing through the center of the cylinder. For this reason, the cartridge holder 23 is crushed in a direction substantially parallel to the optical axis of the camera at the central portion 23a. Further, the portion 23b on the tip end side tends to be deformed along the outer peripheral surface of the cartridge 12. However, the corresponding portion 23b of the patrone presser foot 23 is
Since the holding wall 15 is continuous with the outer peripheral surface of the cartridge chamber 12 of the camera body 10, the holding wall 15 between the cartridge 12 loaded in the cartridge chamber 12 and the base end portion of the holding wall 15. The gap is small, so that the deformation of the patrone presser foot 23 causes only a slight deformation 23c as shown by an imaginary line in FIG. Therefore, the damage of the patrone presser foot 23 due to fatigue is prevented as much as possible.

Then, with the back cover 20 closed, information about the film such as the presence or absence of a film printed on the outer peripheral surface of the cartridge 12 loaded through the film confirmation window 21 and the number of films taken are confirmed. be able to.

[0019]

As described above, according to the back cover structure of the camera of the present invention, the patrone presser provided around the film confirmation window inside the back cover is held by the holding wall protruding from the camera body. Since the guide is provided, the deformation of the patrone presser can be reduced. Therefore, fatigue of the patrone presser can be reduced and durability can be improved.

Further, since the holding wall is provided closer to the inside of the camera body than the conventional one, the outside portion of the holding wall can be made larger, and the enlarged portion can be used for the power source battery of the camera or the like. The width of the camera can be reduced by accommodating a part of the parts. Therefore, the size of the camera can be reduced.

[Brief description of drawings]

FIG. 1 is a central cross-sectional view showing a relationship between a cartridge chamber and a part of a back cover of a camera having this back cover structure, with a part omitted, showing a state in which no cartridge is loaded. ing.

FIG. 2 is a central cross-sectional view showing a relationship between a cartridge chamber and a part of a back cover of a camera having this back cover structure, with a part omitted, showing a state in which a cartridge is loaded. ing.

FIG. 3 is a view showing a conventional back cover structure and is a cross-sectional view corresponding to FIG. 2.

[Explanation of symbols]

 10 Camera body 11 Patrone chamber 12 Patrone 12a Film outlet 14 Aperture part 15 Holding wall 20 Back lid 21 Film confirmation window 22 Storage frame 22a Center side wall 22b Tip side wall 23 Patrone holder 23a Center side of the back lid of the Patrone holder Part 23b Part on the tip side of the back cover of the patrone presser foot 23c Deformation

Claims (1)

[Claims] 1. A film confirmation window for externally observing information about the type of film printed on the outer surface of a cartridge loaded in a camera, and a cartridge holder for accommodating a frame on the inner peripheral edge of the film confirmation window. In the back cover structure of the camera held and attached to the back cover, the wall portion located on the end portion side of the back lid of the housing frame is made lower than the wall portion located on the center portion side of the back lid, Part of the patrone presser is placed on the side wall part of the housing, and in the wall part of the housing frame other than the end side wall part, the patrone presser is housed inside the housing frame and the patrone of the camera body is loaded. A holding wall is formed at an end on the side of the cartridge chamber, which is close to the end side wall of the housing frame when the back cover is closed, and the end side wall is formed when the back cover is closed. Side of the patrone presser placed on the Rear cover structure of a camera, characterized in that is positioned along the retaining wall and the disengageably an end portion of the outer portion and a back lid of the holding wall.