JP2970972B2 - Film unit with lens and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film cartridge loaded with a cover member for opening and closing a film passage.
A <br/> shall relates to a that film unit and its manufacturing method.

[0002]

2. Description of the Related Art A conventional 135-film patrone has a patrone main body composed of a body and a cap made of a thin metal plate, and a film is wound around a resin spool in the patrone main body. Further, a flocked cloth called "telemp" is attached to the film entrance formed in the patrone main body, so as to shield the inside of the patrone main body.

[0003] In recent years, the reuse of parts and raw materials has been active in various manufacturing fields, but the above-mentioned film patrone cannot be said to have good recyclability. This is because conventional film patrones are composed of various materials, so even if these are reused as raw materials, they must be once decomposed and separated for each material, thereby avoiding a drop in productivity. I couldn't. From such a viewpoint, the patrone body is also made of resin like the spool,
Further, a film patrone has been proposed which also incorporates a resin-made lid member for shielding light from the film entrance and exit.
According to this, after the photographed film is taken out, the patrone body can be melted and pelletized together with the spool, and it is possible to efficiently reuse the raw material.

On the other hand, a film unit with a lens in which a film cartridge is incorporated in a unit main body at the time of manufacturing so that a user can easily take a photograph simply by performing a photographing operation is widely used. In a film unit with a lens, a film that has been photographed is wound around the cartridge body by a film winding operation after photographing. Then, the used film unit with the lens is collected as it is in the developing laboratory. At the photo lab, the patrone containing the film that has been photographed is taken out of the film unit with the lens.However, in conventional film patrones, the film entrance and exit are shielded from light by telemping, so the patrone can be taken out in a bright room. .

[0005]

However, in order to improve the reusability as described above, the patrone body is made of resin, and the film patrone is opened and closed with a lid member. If the film cartridge is taken out from the film unit, the external light will enter through the film entrance and be caught in the cartridge body if the lid is not securely closed when removing the film cartridge from the film unit with the lens. The exposed film is exposed to external light. Of course, there is no problem if the unloading operation is performed in a dark room. However, considering that a large number of film units with lenses are used, the increase in the number of dark room operations is a major problem in terms of work efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and when taking out a patrone containing a photographed film from a film unit with a lens, the lid member is securely closed without using a complicated interlocking mechanism. and to provide a lenses fitted photo film unit so as to move in.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention incorporates a lid member rotatable between a closed position for blocking a film passage and an open position for opening a film passage into a cartridge body. At the same time, at one end of the lid member, an engaging portion with which a bottom lid lock member provided on the lens-fitted film unit is engaged is formed.

A film unit with a lens used by loading the above-mentioned film cartridge is provided with a bottom cover which is opened when the film cartridge in which a photographed film is rolled is taken out in an axial direction, and which is engaged with the cover member. A bottom cover lock member for holding the bottom cover in the open position and locking the bottom cover in the closed position, and when the bottom cover lock member is unlocked when the bottom cover is opened, the cover is closed. It is structured to rotate the member to the closed position.

When the film cartridge is loaded in the film unit with the lens, the film passage is located on the back side of the film unit with the lens, so that the hinge of the bottom cover is located on the front side of the film unit with the lens. The lock member is provided on the rear side of the lens-fitted film unit.

In order to assemble the lens-equipped film unit having the above-described mechanism, the film cartridge and the film are loaded into the lens-equipped film unit, and then the closed position and the open position of the patrone body are shielded after the film cartridge and the film are loaded into the lens unit. The bottom cover provided with a projecting piece that engages with the cover member that rotates between the open position and a bottom cover lock member that locks and releases the bottom cover in conjunction with the projecting piece. The cover member and the bottom cover lock member are engaged by closing the lock member in the lock position, and further, a rear cover forming the unit body forms a lock groove for engaging with the lock piece of the bottom cover lock member, By attaching the rear cover, the bottom lid is locked, and the assembly of the unit body is completed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 showing an example of a main body (unit main body) of a film unit with a lens using the present invention and a film patrone used by being loaded on the main body, a unit main body 2 has a main body base 3 made of resin. And its front,
A front cover 4 and a rear cover 5 are provided on the back surface.
The main body 3 incorporates a shutter mechanism including shutter blades, a film winding mechanism, and the like. The front cover 4 covers a shutter mechanism or the like assembled to the main body base 3, and the rear cover 5 has a function of covering the rear side of the main body base 3 light-tightly and contacting the rear surface of the film to hold the film on the exposure surface. .

The rear cover 5 is integrally provided with a bottom plate 6 for covering the bottom surface of the main body base 3. A notch 6a is formed at one end side, and the bottom surface of the patrone chamber 8 provided in the main body base 3 is exposed. doing. A bottom cover 4a that covers the notch 6a is formed integrally with the front cover 4, and a thin hinge portion 4b is formed.
It can be opened and closed freely via. And usually bottom cover 4
a covers the notch 6a, and the patrone chamber 8 is kept light-tight. The bottom cover 4a is opened when the film cartridge 10 in which the photographed film is wound is taken out of the used unit body 2.

A lock member 12 is mounted on the bottom cover 4a. The lock member 12 functions to lock the bottom cover 4a in the closed position. For this reason, a lock piece 12a that fits into a lock groove 13 provided in the rear cover 5 is provided integrally. When the lock member 12 is turned by a driver, a jig, or the like using the groove 12b exposed on the bottom surface side, the lock piece 12a comes off the lock groove 13, and the bottom cover 4a can be opened. The lock member 12 is further provided integrally with a plate-shaped protruding piece 12 c protruding toward the cartridge chamber 8. The projecting piece 12c engages with a cover member 18 incorporated in the film cartridge 10.

More specifically, as shown in FIG. 2, the film cartridge 10 incorporated in the unit body 2 has upper and lower cases 10a and 10b made of resin moldings, and a film 16 which is rotatably housed therein. It comprises a spool 17 attached and a lid member 18. Lid member 18
Is rotatably incorporated in a film passage 20 formed at the joint between the upper and lower cases 10a and 10b. A slit 18a is formed in the cover member 18. The slit 18a opens the film passage 20 when the cover member 18 is at the rotation position shown in FIG. 3A, and the film passage 20 when the cover member 18 is at the rotation position shown in FIG. Block 20 light tightly. One end face of the lid member 18 is exposed from the side face of the film cartridge 10, and an engagement groove 18b is formed in the end face. Then, as shown in FIG. 4, the projection 12c of the lock member 12 is engaged with the engagement groove 18b.

The operation of the above configuration will be described. The unit main body 2 is assembled in a dark room, and the film cartridge 10 is assembled at the time of the assembly. At the time of assembling the film cartridge 10, the cover member 18 is moved to the position shown in FIG.
The film 16 is fully pulled out of the film cartridge 10 and stored in the film roll chamber of the main body base 3 in a rolled state. At this time, the rear cover 5 has not been attached yet, and the bottom cover 4a
1 is open as shown in FIG. 1, the film cartridge 10 and the rolled film 16 can be stored from the bottom side of the main body base 3.

A film cartridge 10 and a film 16
Is loaded into the main body base 3, and the bottom cover 4a is closed while being rotated to the lock position shown in FIG. Since the cover member 18 of the film cartridge 10 is at the rotation position shown in FIG. 3A, the engaging groove 18b is parallel to the film 16 as shown in FIG. Further, the projecting piece 12 of the lock member 12
Since c is also parallel to the film 16, the protruding piece 12c fits into the engaging groove 18b when the bottom cover 4a is closed. Thereafter, the rear cover 5 is attached to cover the rear surface of the main body base 3 light-tightly. At this time, the lock piece 12a of the lock member 12 is
Fits in 3.

After assembling the unit body 2 in this way,
A film box with a lens is completed by covering a paper box with cosmetic printing on the surface. As is well known, an opening is formed in a required portion of the paper box, and the lens-fitted film unit is used in the paper box. By operating the winding operation dial 25 (FIG. 4) every time the photographing operation is performed, the spool 17 of the film cartridge 10 is rotated, and the photographed film 16 is removed from the film cartridge 10.
Get caught in. Then, when the dial 25 is turned after the last frame is photographed, all the photographed films 16 are wound into the film cartridge 10.

The used lens-fitted film unit is directly collected at the developing station, where the paper box is removed and the film cartridge 10 is taken out of the unit body 2. This removal operation is performed in a light room. First, a driver or the like is inserted into the groove 12b to open the bottom cover 4a, and the lock member 12 is turned clockwise. Lock member 12
When is turned clockwise, the lock plate 12a comes off the lock groove 13 and the bottom cover 4a can be opened. Also,
At the same time, when the protruding piece 12c rotates the lid member 18 and the lock member 12 reaches the unlock position, the lid member 1
8 rotates to the closed position shown in FIG.

When the cover member 18 is rotated to the closed position, the film passage 20 of the film cartridge 10 is light-tightly closed, and external light is blocked even when the bottom cover 4a is opened.
Never enter 0. As described above, when the film passage of the film patrone 10 is shielded at the beginning of the operation of taking out the film patrone 10, the work of taking out the film patrone in the light room can be performed without using a light-blocking cloth for the film patrone as in the related art. Can be performed. Therefore, the entire film cartridge 10 can be made of the same resin molded part, and the reuse of the film cartridge is greatly simplified.

Further, according to the above configuration, if the film 16 is not completely caught in the film cartridge 10 through the slit 18a of the cover member 18, the film 16 is sandwiched between the cover member 18 and the film passage 20. Therefore, the lid member 18 cannot be rotated to the closed position. Therefore, if a part of the film 16 protrudes from the film cartridge 10, the lock member 12 cannot be completely turned to the release position, and it is possible to prevent an accident that the bottom cover 4a is opened by mistake. In practicing the present invention, the bottom cover that is opened when the film cartridge is taken out may be integrated with the rear cover, or may be a separate component, and in any case, these bottom covers may be opened. Then, the cover member of the film cartridge may be closed in conjunction with the movement of the lock member operated to release the lock.

[0021]

As described above, according to the present invention,
According to the lens-fitted photo film unit, when and eject the film patrone involving photographed the film, a lid member provided in the film passage routed to the closed position at the time of opening the bottom lid of the film unit Because of this, the film is shielded from light, so that all parts can be made of resin molded products without using a foreign material such as a flocking cloth used in conventional film patrones. The manufacturing cost of the device itself is low, and the parts and materials can be easily reused at low cost.

Further, according to the film unit with lens to which the present invention is applied, the lock member is incorporated into the bottom cover provided on the film unit with lens for taking out the film cartridge, and the lock member is turned to the release position when the bottom cover is opened. Since the lid of the film patrone is sometimes closed, even if the film patrone is taken out in a bright room, the possibility of exposing the photographed film to outside light is eliminated.

Also, by providing the hinge portion of the bottom cover on the front side of the film unit with the lens and the bottom cover locking member on the back side, a mechanism for rotating the cover member of the patrone and a mechanism for locking the bottom cover are provided. Can be integrated, so that the number of parts can be reduced and film cartridges can be quickly loaded and unloaded.

Further, since the assembly of the film unit with the lens is performed in such a sequence that the engaging portions of the film patrone and the bottom cover are not excessively applied to the respective engaging portions, the engaging portions of the two can be easily and surely not damaged. It can be assembled so as to engage with.

[Brief description of the drawings]

FIG. 1 is an external view of a main body of a film unit with a lens and a film cartridge using the present invention.

FIG. 2 is a partially cutaway perspective view of a film cartridge using the present invention.

FIG. 3 is a sectional view of a main part of the film cartridge shown in FIG. 2;

FIG. 4 is a sectional view of a main part in a state where a film cartridge is loaded in the unit main body shown in FIG. 1;

[Explanation of symbols]

 2 Unit body 4 Front cover 4a Bottom cover 10 Film patrone 12 Lock member 16 Film 18 Lid member

Claims (2)

(57) [Claims] 1. A Pato the rotatable film cassette incorporating the cover member Ru pre-loaded between an open position for opening the closed position and the film passageway to block the film passageway
Opening and closing the rone chamber and the patrone chamber
A film unit with a lens having a bottom cover movable between a closed position and a closed position , wherein the film unit is attached to the bottom cover and locks the bottom cover in the closed position.
Rotation between the lock position and the release position to release the lock
The bottom cover locking member and the bottom cover locking member
And a projection that engages with an end of the lid member.
A turning direction of the lid member from the open position to the closed position,
Rotation of the bottom lid lock member from the lock position to the release position
A film unit with a lens, wherein the direction is set to the same direction, and the lid member is rotated to the closed position simultaneously with the unlocking of the bottom lid . 2. A film unit with a lens in which a film cartridge having a lid member rotatable between a closed position for blocking the film passage and an open position for opening the film passage is mounted in advance. A bottom cover that has a projecting piece that engages with the lid member and rotates between the closed position and the open position after the film is loaded, and moves between the locked position and the released position in conjunction with the projection piece; When the bottom cover provided with the lock member is closed, the bottom cover lock member and the cover member are engaged by setting the bottom cover lock member to the lock position, and further formed on the rear cover when the rear cover constituting the unit body is attached. The bottom cover is locked by engaging the locked groove and the lock piece of the bottom cover locking member, thereby manufacturing a film unit with a lens.