JPS63305331A - Camera provided with attachable/detachable rear cover - Google Patents

Abstract

PURPOSE:To make it possible to attach an accessory such as a long film bag by removing body covers and to improve using procedure by making it possible to detach a camera rear cover and making it possible to detach an inner cover, as well from a camera body. CONSTITUTION:The titled camera is provided with a spool 13, a camera body 11 provided with a spool room (SR), an attachable/detachable rear cover 21 attachably/detachably fitted to the camera body 11, the inner cover 30 applied to a camera capable of fitting an accessory by detaching the rear cover 21, supported on the camera body on the its rear side so as to be opened/closed and covering at least a part of the spool room (SR) at the closed position, and a locking/unlocking mechanism 100 capable of attaching/detaching the inner cover 30 to/from the camera body. In the case of attaching the accessory, the rear cover 21 is detached and the inner cover can be also detached by the mechanism, so that the operability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a camera equipped with a removable back cover and an easy loading device.

B. Prior Art Various types of easy loading devices have been known in the past. For this type of device, for example, Japanese Patent Application Laid-Open No. 58-23022
As proposed in the publication, in addition to the back cover that can be opened and closed on the back of the camera, an inner cover that covers at least a part of the spool chamber is provided that is rotatable around a fixed axis. This ensures the engagement between the film perforation and the sprocket, and allows the film loading state to be visually checked while the in is open.

Problems to be Solved by the C0 Invention However, this prior art is mainly aimed at compact cameras, and does not have a mechanism that allows the user to remove the inner cover. For this reason, it is not suitable for so-called system cameras in which the back cover is removed and accessories such as long film backs are attached.

SUMMARY OF THE INVENTION An object of the present invention is to provide a camera with a detachable back cover from which an inner cover for use with an easy loading device can be removed.

An explanation will be given with reference to FIGS. 1 and 4 showing an example of a means for solving the D1 problem.
The present invention includes a camera body 11 equipped with a spool 13 for winding a film, a spool chamber SR for storing the spool 13, and a removable back cover 21 detachably provided on the camera body 11. The above-mentioned problem is applied to a camera in which accessories can be attached by removing the back cover 21, and the above-mentioned problem is solved by a camera that is supported in an openable and closable manner on the camera body 11 on the back side of the camera and covers at least a portion of the spool chamber SR in the closed position. The inner cover 30 and the inner cover 3o are attached to the camera body 11.
This problem is solved by providing a locking/detaching mechanism 100 that can be freely attached and detached from the holder.

When attaching the 80 action accessory, the back cover 21 is removed and the inner cover 30 is also removed using the locking/disengaging mechanism 100.

F. Example The present invention will be explained in detail with reference to FIGS. 1 to 9.

Figure 1 is a sectional view showing the easy loading device, Figure 2 is a sectional view showing the easy loading device.
The figure shows the relationship between the spool, the spool roll, and the film, FIG. 3 is a rear view with the back cover open, and FIG. 4 is a perspective view showing the structure of the inner cover.

In these figures, a sprocket 12 and a spool 13 are housed in a film winding chamber, ie, a spool chamber SR, formed on the winding side of the camera body 11. As shown in FIG. 2, the spool 13 is provided with a claw 14 at a position corresponding to the perforation P of the film F. When the spool 13 is driven counterclockwise by a motor 15 housed in the spool 13, The perforation P is engaged with the claw 14 and the film F is wound up. The sprocket 12 rotates passively as the film F is transferred, and when the sprocket 12 rotates by one rotation (8 perforations), a winding completion signal is issued by an encoder (not shown). The back cover 21 is rotatably attached to the body 11 by a back cover hinge 22, and forms a dark box together with the body 11 in the closed state shown in FIG. Rollers 23 and 24 are attached to the back cover 21 to prevent the teeth of the sprocket 12 from coming off the perforations P of the film F when the back cover is closed.

As shown in FIGS. 1 and 3, an inner cover 30 is rotatably attached to the back cover hinge side opening of the spool chamber SR via hinges 33 and 34, which will be described later.

A spool roller receiver 17 is attached with a hinge 16 inside the camera body 11 located between the sprocket 12 and the spool 13, and the spool roller 19 is pressed against the spool 13 by the pressing force of a torsion spring 18.

The spool roller 38 has a roller shape that straddles the claw 14 corresponding to the perforation P of the film F, as shown in FIG. The spool roller 19 is a simple cylinder because it only needs to press the film at the middle position of the spool '13.

Next, the structure of the inner lid 30 will be explained with reference to FIGS. 1, 3, and 4.

As shown in FIG. 4, the inner cover 30 has an inner cover main body 31 and a shaft 32 connected to one end thereof, and a window WI is formed in the inner cover main body 31. The shaft 32 is provided with a movable hinge 33 that can extend and retract from its upper end surface, and a fixed hinge 34 that projects from its lower end surface. A spring 35 that urges the movable hinge 33 upward is inserted into the shaft 32, and when the pin 36 screwed to the movable hinge 33 is pushed down against the spring 35, the movable hinge 33 is pushed into the shaft 32. die. Here, the movable hinge 33, the spring 35, and the pin 36 constitute the engagement/disengagement mechanism 100.

A spool roller receiver 39 that rotatably holds a spool roller 38 is rotatably attached to a hinge 37 that is rotatably supported on the inside of the tip of the inner lid main body 31, and is rotated in the counterclockwise direction UC as shown in the figure by a torsion spring 40. The stopper portion 39a stops at the position where it comes into contact with the inner lid main body 31. When the spool roller receiver 39 rotates clockwise against the torsion spring 40, it stops at a position where the stopper portion 39b comes into contact with the inner lid body 31. Note that at this time, a part of the spool roller 38 is located within the window WI.

Here, with further reference to FIGS. 5 and 6, the inner lid 3
0 will be explained.

FIG. 5 is a sectional view taken near the lower end of the inner lid 30.

FIG. 6 is a sectional view taken near the top and bottom center of the back cover 21. In both figures, the spool roller 38 and its associated members are omitted to simplify the drawings.

An opening/closing limiting lever 41 and a torsion spring 42 are attached to the vicinity of the fixed hinge 34 of the inner lid rotating shaft 32, and the opening/closing limiting lever 41 is fixed to the spool chamber opening end 61a of the camera body 11 as shown in FIG. Then, the spring 42 applies a counterclockwise force that causes the inner lid main body 31 to open. Therefore, in the film loading state, two torsion springs 40
The inner cover 30 is urged in the opening direction by the torsion spring 42, but in the inner cover closed position, the locking latch portion 31a of the inner cover main body 31 engages with the click pin 27 protruding from the camera body side. , locks the inner lid 30. A lever 26 is disposed inside the substantially vertical center of the back cover 21 and is biased clockwise in FIG. 6 by a torsion spring 25, facing the locking latch portion 31a. , since the lever 26 engages with the locking latch portion 31a and forcibly disengages the click pin 27 from the inner M30, the inner lid 30
can be opened together with the back cover 21. At this time, since the positions of the hinge 22, movable hinge 33, and fixed hinge 34 of the inner cover 30 and the back cover 21 are different, the back cover 21
When fully opened, the back cover lever 26 and the locking latch part 31a
The connection will be removed.

In addition, in FIG. 3, 28 is a film guide plate for preventing the leading edge of the film from bending inside the camera body before reaching the spool 13 and for smoothly introducing the film.
Reference numeral 29 is a film leading edge indicator, which indicates the position at which the leading edge of the film should be pulled out when loading the film.

The operation of the easy loading device configured as above will be explained next.

To load film F, open the back cover 2 as shown in Figure 7.
1 and the inner lid 30, load the cartridge into the cartridge chamber (not shown) on the left side of the camera body in the same way as before, and place the film leader tip on the spool 13 by aligning the tip of the film leader with the film tip indicator 29 shown in FIG. Place it on the container and close the inner lid 30. As mentioned above, the locking latch portion 31a is connected to the click pin 2.
7 and the inner lid 30 is held in the closed position. At this time, the spool roller 38 provided on the movable end side of the inner lid 31 via the spool roller receiver 39 presses the spool 13 by the spring force of the torsion spring 40 attached to the hinge 37 of the spool roller receiver 39. , Film F
The leader portion of the spool 13 is pinched between the spool 13 and the spool roller 38, resulting in the state shown in FIG. This situation shows the inner lid 30
This can be confirmed from the window WI. Note that it is preferable to make sure that the perforations mesh with the teeth of the sprocket.

In this state, when a release button (not shown) is pressed, the spool 13 is slowly driven counterclockwise for a certain period of time determined by a timer. The reason for feeding the film at such a slow speed is to wind the film without tearing the film perforations even at low temperatures.

Furthermore, driving the sprocket 12 only for a certain period of time determined by a timer without using the signal output from the decoder when it rotates for one frame is not necessary for checking the state of film winding. This is to save the film as much as possible since the length of the film is not required.

Next, after checking that the leading edge of the film is rolled up, remove the back cover 21.
Close. In the process of closing the back cover 21, the lever 26 shown in FIG. 6 comes into contact with the inner cover locking latch part 31a, but the lever 26 resists the force of the spring and escapes counterclockwise, so it does not affect other parts. The back cover 21 can be closed without causing any damage. after that.

A predetermined number of frames are skipped and the camera enters the shooting state.

After several shots are taken, as shown in Figure 8, spool 1
Even if the diameter of the film wound on
Since the camera is evacuated to I, a predetermined number of images can be taken. At this time, the shape and mounting position of the back cover roller 24 are determined so that the film F is wound up without contacting the spool roller receiver 39 of the inner cover 3o.

When the film is rewound and the back cover 21 is opened after taking a predetermined number of shots, the inner cover 30, which was locked to the click pin 27, is forcibly removed by the lever 26, and the inner cover 30 is held by the torsion spring 42.
It opens automatically with the force of. If you remove the cartridge at this point, you can load the next film.

Next, a case will be described in which the back cover 21 is closed without closing the inner cover 3o.

After aligning the film F with the film tip indicator 29, remove the inner lid 3.
If you close the back cover 21 with 0 open, the inner cover 30 will close to the back cover 2.
When the back cover 21 is fully operated to the closed position, the inner cover 30 also rotates to the closed position, and its locking latch portion 31a engages with the click pin 27. . Therefore, the film F is pinched between the spool roller 38 and the spool 13 in the same manner as described above, and the film can be wound. In this case, visual confirmation of film winding is not possible.

FIG. 9 shows a state in which a long back is attached to the camera body of FIG. 1 to which the present invention is applied.

After removing the back cover 21 attached to the camera body via a hinge 22 and the inner cover 30 attached via a movable hinge 33 and a fixed hinge 34, a long bag 50 is attached.

That is, the back cover 21 is attached to the camera body 1 by a well-known mechanism.
1, so it can be easily removed, and as shown in FIG.
The movable hinge 33 can be easily removed from the camera body 11 by pushing down and recessing the movable hinge 33 into the shaft 32. and,
The long film back 50 is attached to the same hinge 22 as the back cover 21.
It is attached to the camera body 11 via.

Rollers 51 , 52 , like rollers 24 , 23 , prevent the film perforations from coming off the teeth of sprocket 12 . Inside the magazine outer cylinder 53 and the magazine inner cylinder 54, a spool 55 is rotated by a known mechanism to wind up the film.

G0 Effects of the Invention According to the present invention, the back cover of the camera can be removed, and the inner cover of the camera used as an easy loading device can also be removed from the camera body. Accessories such as the following can be attached to provide an easy-to-use camera.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts of an embodiment of an easy loading device according to the present invention, FIG. 2 is a diagram showing the relationship between a spool, a spool roller, and a film, and FIG. 3 is a diagram of the embodiment shown in FIG. 1. Figure 4 is a perspective view showing the structure of the inner cover, Figures 5 and 6 are diagrams showing the opening/closing mechanism of the inner cover, and Figure 7 is a rear view showing the back cover opened. FIG. 8 is a sectional view showing the state after a predetermined number of images have been taken, and FIG. 9 is a sectional view showing the state in which a long film back is attached. 11: Camera body 12: Sprocket 13 varnish spool 21: Back cover 22: Hinge 27: Click pin 30: Inner cover
31: Inner lid body 31a: Locking latch portion 32: Shaft 33: Movable hinge 34: Fixed hinge 35: Spring
36: Pin 38 Varnish spool roller 39 Varnish spool roller receiver 40: Torsion spring 100: Engagement/disengagement mechanism Patent applicant Nippon Kogaku Kogyo Co., Ltd. Representative Patent Attorney Fuyu Nagai 15 Screen Figure 3 Figure 5

Claims (1)

[Scope of Claims] A camera body including a spool for winding film, a spool chamber for storing the spool, and a detachable back cover that is removably attached to the camera body, and the back cover is removed. an inner lid that is supported in an openable and closable manner on the camera body on the back side of the camera and covers at least a portion of the spool chamber in a closed position;
A camera equipped with a removable back cover, characterized in that the inner cover is provided with a detachable mechanism that allows the inner cover to be detachably attached to the camera body.