JP2846982B2 - Photo film patrone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film cartridge having a cover for opening and closing a photographic film passage.

[0002]

2. Description of the Related Art As disclosed in U.S. Pat. Nos. 4,634,306 and 4,832,275, even when not in use, the leading end of the photographic film is wound into the cartridge body, and when used, the spool is rotated. Has been proposed in which a photographic film is sent out. A photo film cartridge having such a function is disclosed in
As described in Japanese Patent No. 37645, there is known a device in which an openable and closable lid member is used in order to reliably shield the photographic film discharge port from light.

[0003]

However, in the above-mentioned photographic film patrone described in Japanese Patent Application Laid-Open No. Hei 3-37645, since the lid member is a plate-like member hinged to the patrone main body, vibration and There is a drawback that it is easy to open when a slight impact is applied. Further, in the above-mentioned photographic film patrone, since the leading end of the photographic film does not protrude from the patrone body at all before or after use, it is impossible to know whether or not the photographic film has been used, as in the conventional case.

The present invention has been made in view of the above circumstances, and a cover member covering a photo film discharge port is not accidentally opened due to vibration or impact. It is another object of the present invention to provide a photographic film cartridge which displays a message indicating that the photographic film has been completed, and further operates the lock mechanism of the spool in conjunction with the lid member.

[0005]

In order to achieve the above object, according to the present invention, a slit-shaped photographic film passage formed in the cover member is formed in the cartridge body by displacing the cover member when feeding the photographic film. It is designed to communicate with the photo film passage. Further, when the lid member is displaced to the open position, the display means provided on the patrone main body is operated to display the used state, or the spool lock mechanism is operated in conjunction with opening and closing of the lid member. It is configured to operate.

[0006]

1 to 3 show an example of a photographic film patrone using the present invention. A patrone main body 2 is composed of case bodies 2a and 2b formed of plastic, respectively. In the patrone main body 2, a spool 4 around which the photo film 3 is wound is rotatably stored. The inner surfaces of the case bodies 2a and 2b are in contact with the outer peripheral surface of the photographic film 3 wound on the spool 4,
Are formed integrally with each other to prevent loosening of the winding. Thus, when the spool 4 is rotated clockwise in the figure, the photographic film 3 is also rotated integrally with the spool 4,
When the leading end of the photo film 3 is scooped up by the separation claw 6, the photo film 3 advances toward the photo film passage 7.

A lid member 8 having a slit-shaped photographic film passage 8a is attached to the cartridge body 2. The lid member 8 can be moved up and down with respect to a support plate 9 fixed inside the case body 2b. The lid member 8 is formed of plastic, and a leaf-shaped spring 8b is integrally formed on the bottom surface thereof.
In the raised position (closed position). When the lid member 8 is in the closed position shown in FIG. 3, the photographic film passage 7 of the cartridge body 2 is closed by the lid member 8, and the inside of the cartridge body 2 is in a light-shielding state.

As shown in FIG. 2, the case body 2b is provided with a trifurcated lever 11 which is rotatable about a shaft 10 and is urged counterclockwise by a spring. One end 11a of the lever 11 projects into the movement path of the lid member 8, the other end 11b projects from the patrone main body 2, and a lock claw 11c is provided at the other end. When the lever 11 is at the illustrated position due to the bias of the spring,
The lock claw 11c is engaged with a gear-shaped lock plate 12 integrally attached to the spool 4 to lock the rotation of the spool 4.

A display plate 14 is provided below the cover member 8. The display plate 14 is urged upward by a leaf-shaped spring 14a integrally formed on the bottom surface thereof. Click projections 14b are formed on the left and right end surfaces of the display plate 14, and when the display plate 14 is pushed down to a predetermined position, it is fitted into a click groove (not shown) provided in the case body 2b, and thereafter rises. Not to be. Display board 1
4 has an unused display 15a and a used display 15b. When the display plate 14 is at the illustrated elevated position, the unused display 15a is displayed externally through the display window 16.

When the photographic film cartridge is loaded into the cartridge housing chamber of the camera from the direction indicated by arrow X in FIG. 1, the drive shaft of the camera is engaged with the spool 4. In addition, during the loading process, the lever 11 is pushed leftward from the position shown in FIG. 1 against the bias of the spring due to engagement with the projection provided in the cartridge housing chamber. As a result, the lever 11 is
When rotated clockwise around 0, one end 11a is retracted from under the lid member 8, and at the same time, the lock claw 11c is disengaged from the lock plate 12, and the lock of the spool 4 is released.
Thereafter, the lid member 8 is pushed down by the mechanism on the camera side and moves to the open position. When the lid member 8 is pushed down in this way, as shown in FIG. 4, the photographic film passage 8a formed in the lid member 8 is in a state of communicating with the photographic film passage 7 in the cartridge body 2. When the lid member 8 is pressed down, the display plate 14 is also pressed down against the spring 14a, and the click projection 14b is fitted into the groove of the case body 2b and locked at the lowered position. With the lowering of the display board 14,
A used display 15b appears behind the display window 16.

Thereafter, the spool 4 is driven by the drive shaft of the camera.
Is driven clockwise in FIG. 2, the photo film 3 rotates together with the spool 4. When the leading end of the photo film 3 rotates to the position of the separating claw 6, the leading end of the photographic film is guided to the photographic film path 7 by the separating claw 6, and further passes through the photographic film path 8a of the lid member 8, and the cartridge body. 2 sent out. In order to smoothly feed the front end of the photographic film, it is preferable to round the edge portion of the lid member 8 denoted by reference numerals 8c and 8d in FIG. 4 to a radius of about 0.2 to 1 mm. In addition, a conventional photo film 3 is used.
When using a 5 mm color negative photographic film, the width D of the slit 8a is 0.15 to 2 mm, preferably 0.2 to 0.8 mm, and particularly preferably 0.2 to 0.3 m.
m.

The leading end of the photographic film is fed to the take-up spool of the camera by driving the spool 4. After the leading end of the photographic film is wound on the take-up spool, the spool 4 is in a free state, and the photographic film 2 is pulled out from the cartridge body 2 by driving the take-up spool. After the photographing is completed, the spool 4 is rotated in the photographic film winding direction by the drive shaft on the camera side, and the photographic film that has been photographed is wrapped around the cartridge body 2 to the tip. Thereafter, the pressing down of the lid member 8 is released. As a result, the lid member 8 returns to the closed position shown in FIG. 3 by the bias of the spring 8b, and the photographic film passage 7 of the cartridge body 2 is closed by the lid member 8.

When the back cover of the camera is opened and the photographic film cartridge is taken out, the lever 11 returns to the locked position by the bias of the spring, and the pushing down of the cover member 8 is prevented. Even when the lid member 8 returns to the closed position, the display plate 14 is still locked at the lowered position by clicking.
6 shows a used display 15b. Therefore,
Whether or not the photo film cartridge has been used can be easily identified from the display window 16. Further, when the lever 11 returns to the lock position, the lock claw 11c engages with the lock plate 12, and the rotation of the spool 4 is locked. Therefore, the spool 4 does not rotate due to vibration or the like, and the leading end of the photographic film 3 is not forced into the photographic film passage 7 closed by the lid member 8.

FIGS. 5 and 6 show other examples of the lid member. A rotary cover member 22 is provided in the photo film passage 21 in the cartridge body 20. The cover member 22 is formed with a photo film passage 22a of a slit through which the photo film 3 passes. When this photo film cartridge is loaded into the camera and the back cover is closed, the mechanism on the camera engages with the groove 22b formed at one end of the cover member 22 to rotate the cover member 22. As a result, as shown in FIG. 6, the photo film passage 22a of the lid member 22 matches the photo film passage 21 in the cartridge body 20. Thereafter, when the spool 4 is rotated in the direction in which the photographic film is sent out, the leading end of the photographic film 3 passes through the photographic film passage 21 and the photographic film passage 22a, and is sent out of the cartridge body 20 from the discharge port 23 in the same manner as in the above-described embodiment. It is. When the photo film 3 is wound into the patrone main body 20 after the photographing, the cover member 2 is moved by the mechanism on the camera side.
2 is reversed, and the photo film passage 21 is closed.

7 to 9, which show another example of the present invention, the patrone main body 30 is composed of an outer cylinder 31 and an inner cylinder 32. The photo film 3 is wound around the spool 33 and stored in the inner cylinder 32. One end of the spool 33 is rotatably supported by a shaft 32 a provided on the inner cylinder 32, and the other end of the spool 33 is rotatably supported by a bearing hole 31 a of the outer cylinder 31. Then, the spool 33 can be rotated in the inner cylinder 32 through the bearing hole 31a. The open end of the inner cylinder 32 is fitted in a groove 31b formed in a ring shape on the inner wall of the outer cylinder 31,
An engagement hole 32b is formed in the outer wall of the side surface of the inner cylinder 32. The inner cylinder 32 rotates in the outer cylinder 31 by rotating the camera-side mechanism by engaging the engagement hole 32b.

Each of the outer cylinder 31 and the inner cylinder 32 has slit-shaped photographic film passages 31c and 32c. Then, the inner cylinder 32 is rotated with respect to the outer cylinder 31, and the spool 33 is driven after the photographic film passage 32 c of the inner cylinder 32 matches the photographic film passage 31 c of the outer cylinder 31. Can be sent out of the patrone main body 30. The spool 3
In order to feed the photographic film 3 by rotating the photographic film 3, the rib 5 and the separation claw 6 are used as in the above-described embodiment.

The embodiment shown in FIG. 10 shows an example in which the lid member is also used as a spool lock member. A gear-shaped lock plate 35 is fixed to the spool 4 as in the embodiment of FIG. Inside the patrone main body 36, a spool lock member 37 formed integrally with the lid member is slidably incorporated in the direction of arrow Y in the drawing.
In the closed position shown in the figure. A photo film passage 39 is formed at the upper end of the spool lock member 37, and closes the photo film passage 40 of the cartridge body 36 in the illustrated closed position. In this state, the lock claw 37a provided integrally with the spool lock member 37 is engaged with the lock plate 35, and the rotation of the spool 4 is prohibited. The spool lock member 37 is provided with a projection 37b, which protrudes from a side surface where one end of the spool 4 is exposed.

When the photographic film cartridge is loaded into the camera, the projection 37 is pushed down in the direction of arrow Y by the mechanism on the camera side. As a result, the lock claw 37a is disengaged from the lock plate 35 to enable the rotation of the spool 4, and the photo film passage 39 formed at the upper end of the spool lock member 37 matches the photo film passage 40 of the cartridge body. Therefore, by rotating the spool 4 in the clockwise direction, the leading end of the photographic film 3 can be sent out of the cartridge body by the action of the ribs 5 and the separation claws 6. When the spool lock member 37 is depressed, the display plate 41 is moved, and the display window 42 displays the used status. This display plate 41 is shown in FIG.
Since the click is stopped at the lowered position as in the embodiment of
Even if the spool lock member 37 rises again by the bias of the spring 38, the display is not switched. When the photographed film is taken in the patrone main body 36 and the photographic film patrone is taken out of the camera, the pressing on the projection 37b is first released. As a result, the spool lock member 37 returns to the closed position shown in FIG. 10 by the bias of the spring 38, and the spool 4 is locked at the same time that the photo film passage 40 is closed.

[0019]

As described above, according to the photographic film cartridge of the present invention, when the photographic film is sent out by rotating the spool, the slit-shaped photographic film passage formed in the lid member is connected to the photographic film passage of the patrone main body. Since they are made to match, the light-shielding performance is greatly improved as compared with a conventional photographic film cartridge using a plate-shaped lid member, and light-shielding leakage due to vibration or impact can be prevented. In addition, if the used display is performed using the display plate that is linked only when the lid member is opened, the used display is performed even when the lid member is closed after photographing. It is also possible to prevent use.
Furthermore, if the spool lock is performed with the lid member closed, when the photo film cartridge is handled externally,
Since the photographic film does not move at all in the patrone body, the leading end of the photographic film does not jam near the photographic film passage in the patrone body.

[Brief description of the drawings]

FIG. 1 is an external view of a photographic film cartridge using the present invention.

FIG. 2 is a fragmentary cutaway view of the photographic film cartridge shown in FIG.

FIG. 3 is a cross-sectional view of the photographic film cartridge shown in FIG.

FIG. 4 is a sectional view of a main part of the photographic film cartridge shown in FIG.

FIG. 5 is an external view of a photographic film cartridge using another example of the present invention.

6 is a cross-sectional view of the photographic film cartridge shown in FIG.

FIG. 7 is an external view of a photographic film cartridge using still another example of the present invention.

8 is a longitudinal sectional view of the photographic film cartridge shown in FIG.

FIG. 9 is a cross-sectional view of the photographic film cartridge shown in FIG.

FIG. 10 is a cross-sectional view showing a main part of another photographic film cartridge using the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lid slit 2 patrone main body 3 photo film 4 spool 7 photo film passage 8 lid member 12 lock plate 14 display plate 16 display window

Claims (1)

(57) [Claims] 1. A movable lid member is provided on a patrone main body in which a spool around which a photo film is wound is rotatably housed, and a passage for discharging the photo film is formed by displacement of the lid member. In the photographic film cartridge in which the leading end of the photographic film is sent out of the patrone body by rotating the photographic film cartridge, a slit-like member communicating with the photographic film passage formed in the patrone body when the cover member is displaced to the open position. A photographic film patrone, wherein a photographic film path is provided, and a display means for displaying a used state in the patrone main body only in conjunction with displacement of the lid member to the open position.