JP3627992B2 - Film unit with lens and manufacturing method thereof - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a lens-fitted photo film unit and a method for manufacturing the same.
[0002]
[Prior art]
A film unit with a lens in which a photographic film with a patrone is pre-loaded in a manufacturing unit at a unit body having a simple exposure mechanism, for example, “Photographic Super Super800” (trade name) is commercially available. Such a lens-fitted photo film unit has a unit body covered with an outer case such as a paper box.
[0003]
The unit main body is formed with a cartridge storage chamber for storing a cartridge, and a film roll chamber for storing a film roll obtained by winding a photographic film drawn out of the cartridge into a roll shape, and a main body base incorporating a simple exposure mechanism, The front cover that covers the front side of the base of the main body and the lid members that cover the bottoms of the cartridge storage chamber and the film roll chamber are integrally formed via hinges, and the rear side of the main body base is covered light-tightly. It consists of a cover.
[0004]
To assemble the lens-fitted photo film unit, an exposure mechanism is incorporated into the base of the main body in a bright room, and then a front cover is attached to the front side of the main body base. On the other hand, in the dark room, the photographic film is pulled out from the cartridge and the leading end is locked to the take-up shaft, and the take-up shaft is rotated to take up the photographic film, thereby producing a roll-shaped film roll. Insert the cartridge into the cartridge storage chamber at the base of the main body that has been moved to the dark room, engage the tip of the spool with the engagement shaft that is formed integrally with the winding knob, and then insert the film roll into the film roll chamber together with the take-up shaft. To do.
[0005]
On the bottom side of the film roll chamber, there is a bowl-shaped film restricting portion having a U-shaped notch through which the take-up shaft passes. When the rear cover is attached to the back side of the main body base, it is integrally formed with the rear cover. The protruding portion enters the U-shaped notch, and the winding shaft protrudes outside from this interval. When the take-up shaft is pulled out, the end face of the film roll comes into contact with the film restricting portion, and the film roll remains in the film roll chamber. Thereafter, each lid member of the rear cover is rotated about the hinge portion and pressed against the base of the main body, so that each lid member engages with each bottom portion of the cartridge storage chamber and the film roll chamber to light them. Close tightly. The film unit with lens is completed by covering the unit main body thus assembled with a paper outer case.
[0006]
[Problems to be solved by the invention]
By the way, as described above, since the lid member is formed on the lower edge portion of the rear cover via the hinge portion, the lid member needs to be rotated during the assembly process. This complicates the assembly process and makes it difficult to automate the assembly process.
[0007]
An object of the present invention is to provide a lens-fitted photo film unit having a configuration that contributes to simplification and automation of the assembly process and a method for manufacturing the same.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a lens-fitted photo film unit of the present invention incorporates an exposure mechanism, and stores a cartridge storage chamber for storing a cartridge, and a film roll in which a photographic film drawn from the cartridge is wound in a roll shape. In the film unit with a lens provided with a main body base in which a film roll chamber is formed, a rear cover that covers the back side, and a front cover that covers the front side of the main body base, the cartridge storage chamber and the film roll chamber with integrally molded in a state where the respective bottom and the lid member for closing the light-tight fixed a front cover, covered with a rear cover after inserting the film roll for each winding shaft film roll chamber on the rear side of the body base, film A roll sandwiched between a notch formed in the bottom of the roll chamber and a notch formed in the rear cover Ri withdrawn axis, by attaching the front cover to the front side of the body base Thereafter, characterized in that close each bottom of the cassette containing chamber and the film roll chamber light-tight by the cover member.
[0009]
[Action]
Because integrally molded in a state of fixing the front cover to the lid member closes the work becomes unnecessary to rotate the lid member. Therefore, the assembly process is simplified and automation is facilitated. Further, since it is not necessary to provide a lid member at the edge of the rear cover, the area occupied by the rear cover is reduced, and the assembly space can be reduced. It is also possible to round the edge of the rear cover.
[0010]
Further, the lid member by engaging an edge of the rear cover this edge, characterized in that the respective bottom of said cassette containing chamber and the film roll chamber to close the light-tight. As a result, the cartridge housing chamber and the film roll chamber are light-tightly closed by the lid member and the rear cover of the front cover, so that the closing structure of each bottom portion of the cartridge housing chamber and the film roll chamber and each lid member is simplified. be able to.
[0011]
The method for producing a lens-fitted photo film unit of the present invention includes an exposure mechanism , a cartridge storage chamber for storing a cartridge, and a roll-shaped film roll in which a photographic film drawn from the cartridge is wound around a winding shaft. In the method of manufacturing a lens-fitted photo film unit, comprising a main body base formed with a film roll chamber for storage, a rear cover covering the back side, and a front cover covering the front side of the main body base, the cartridge storage chamber and each bottom portion of the film roll chamber with integrally molded in a state of fixing the front cover lid member for closing the light-tight, winding the film roll in the film roll chamber insert the cassette into the cassette containing chamber in a dark room A first step of inserting the shaft together, and mounting a rear cover on the back surface of the main body base; A second step of removing the take-up shaft from the cartridge; and a third step of closing the bottoms of the cartridge storage chamber and the film roll chamber in a light-tight manner by a cover member of the front cover by mounting the front cover on the front side of the main body base. It is characterized by the following . This eliminates the need to close the lid member, simplifies the assembly process, and facilitates automation.
[0012]
【Example】
As shown in FIG. 2, the lens-fitted photo film unit 20 is composed of a unit main body 21 in which a photographing mechanism and the like are incorporated, and an outer case 22 for housing the unit main body 21. The outer case 22 has an outline that exposes the winding knob 23, the strobe light emitting unit 24, the shutter button 25, and the like, and has holes for exposing the photographing lens 26, the finder 27, the counter display board 28, and the like. Is provided.
[0013]
As shown in FIG. 1, the unit main body 21 has an exposure mechanism attached to the front, a main body base 31 that houses a photographic film 30 with a cartridge on the back side, a rear cover 32 that covers the back side, and a main body base 31. And a front cover 33 that covers the front side.
[0014]
The main body base 31 has a film roll chamber 37 for storing a film roll 30a in which a photographic film 30 drawn from the cartridge 36 is wound in a roll shape on both sides of the aperture 35, a cartridge storage chamber 38 for storing the cartridge 36, and the like. Is formed. Further, on the bottom side of the film roll chamber 37, a flange 39 is formed for regulating the position of the end face of the film roll 30a. A U-shaped notch 39 a is formed at the center of the flange 39 so that the film roll 30 a can be inserted into the film roll chamber 37 together with the take-up shaft 41. Two engaging claws 40 a and 40 b are formed on the bottom of the main body base 31. Two engaging claws 40c and 40d are formed above the main body base 31.
[0015]
The edge 32a of the rear cover 32 is rounded to smooth the body line of the unit main body 21. Further, the rear cover 32 is formed with a protrusion 43 to be inserted into the notch 39a. A semicircular cutout 43a corresponding to the diameter of the take-up shaft 41 is formed at the tip, and after the film roll 30a is inserted into the film roll chamber 37, the rear cover 32 is put on the back surface of the main body base 31. Then, the winding shaft 41 protrudes from between the notch 39a and the notch 43a. In the edge portion 32a, engagement holes 44a and 44b are formed at positions corresponding to the engagement claws 40a and 40b. Further, engaging claws 44c and 44d are formed at positions corresponding to the engaging claws 40c and 40d.
[0016]
On the lower end side of the front cover 33, lid members 45 and 46 that close light-tightly in cooperation with the rear cover 32 are provided at positions corresponding to the bottoms of the film roll chamber 37 and the cartridge storage chamber 38. And is integrally formed. At the edges of the lid members 45 and 46, ridges 45a and 46a that are engaged with grooves 32b (see FIG. 3) formed in the rear cover 32 are formed. In order to facilitate the removal of the photographed cartridge, it is preferable to provide a thin portion or the like on the lid member 46 so that the lid member 46 is easily broken.
[0017]
In order to assemble the lens-fitted photo film unit 20 configured as described above, the photographic film 30 is pulled out from the cartridge 36 in the dark room, and is wound around the take-up shaft 41 in a roll shape to form a film roll 30a. . In a state where the film roll 30a is obliquely upward, first, the cartridge 36 is inserted into the cartridge storage chamber 38 so that the spool 48 of the cartridge 36 is engaged with an engagement shaft 23a formed integrally with the winding knob 23. . Next, the film roll 30 a is lowered together with the take-up shaft 41 and inserted into the film roll chamber 37.
[0018]
Thereafter, when the rear cover 32 is put on the back side of the main body base 31 and pressed toward the main body base 31, the engaging claws 40a, 40b, 40c, 40d of the main body base 31 are engaged with the engaging holes 44a, 44b of the rear cover 32. , The engaging claws 44 c and 44 d are engaged, and the rear cover 32 is locked to the main body base 31. At this time, the protrusion 43 is inserted into the notch 39a of the flange 39, and the winding shaft 41 projects from the circular opening 50 formed by the notch 39a and the notch 43a.
[0019]
Thereafter, as shown in FIG. 3, when the take-up shaft 41 is pulled out from the film roll 30a through the circular opening 50, the end face of the film roll 30a is regulated by the flange 39 and the protrusion 43. It remains in the roll chamber 37 as it is (A). Subsequently, the front cover 33 is attached to the front side of the main body base 31 by claw engagement. Thus, the protrusions 45a and 46a of the lid members 45 and 46 are inserted into the grooves 32b of the edge portion 32a, and light leaks into the interior from the gap between the edge portions of the lid members 45 and 46 and the edge portion 32a of the rear cover 32. The bottom of the film roll chamber 37 including the circular opening 50 and the bottom of the cartridge storage chamber 38 are closed light-tightly by the cover members 45 and 46 (B). The unit main body 21 that has been loaded in this way is subjected to film winding and an exposure mechanism operation test, and then covered with an outer case 22 to form a lens-fitted film unit 20.
[0020]
In order to shield the gap between the edge of the lid members 45 and 46 and the edge 32a of the rear cover 32, in the above embodiment, the protrusions 45a and 46a are formed on the edges of the lid members 45 and 46. The groove 32b into which the protrusions 45a and 46a enter is formed in the edge part 32a corresponding to the above, but a groove may be formed in the edge part of the lid members 45 and 46 and the protrusions may be formed in the edge part 32a. . Of course, the structure for shielding the gap between the edge portions of the lid members 45 and 46 and the edge portion 32a of the rear cover 32 is not limited to the above-described grooves and protrusions.
[0021]
【The invention's effect】
As described above, according to the film unit with a lens of the present invention and the manufacturing method thereof, since the lid member that tightly closes each bottom of the film roll chamber and the cartridge storage chamber is integrally formed with the front cover, The closing operation of rotating the lid member can be eliminated, contributing to simplification and automation of the assembly process. Further, since it is not necessary to provide a hinge portion on the rear cover, the area occupied by the rear cover is reduced, and assembly work can be performed in a narrow space. In addition, the edge of the rear cover can be easily rounded, and the body line of the lens-fitted photo film unit can be made smooth. In addition, since the bottoms of the film roll chamber and the cartridge storage chamber are shielded from light by the engagement of the lid member of the front cover and the rear cover, the bottoms of the cartridge storage chamber and the film roll chamber and the lid members are closed. The structure can be simplified.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a unit body according to the present invention.
FIG. 2 is an external perspective view of a lens-fitted photo film unit according to the present invention.
FIG. 3 is an explanatory end view showing how the bottom of the film roll chamber is light-tightly closed by a cover member of the front cover.
[Explanation of symbols]
20 Film unit with lens 21 Unit body 30 Photo film with cartridge 30a Film roll 31 Main body base 32 Rear cover 32a Edge 33 Front cover 37 Film roll chamber 38 Patrone storage chamber 45, 46 Lid member 50 Circular opening

Claims (3)

An exposure mechanism is incorporated, and a main body base formed with a cartridge storage chamber for storing a cartridge, a film roll chamber for storing a film roll in which a photographic film drawn out from the cartridge is wound, and covers the back side. In a film unit with a lens provided with a rear cover and a front cover covering the front side of the main body base,
A lid member that closes each bottom of the cartridge storage chamber and the film roll chamber in a light-tight manner is integrally formed with the front cover, and the film roll is inserted into the film roll chamber together with the take-up shaft, and then the base of the main body Cover the rear side with the rear cover, remove the take-up shaft sandwiched between the notch formed at the bottom of the film roll chamber and the notch formed in the rear cover, and then place the front cover on the front side of the base of the main unit. A lens-fitted photo film unit , wherein the bottom of each of the cartridge storage chamber and the film roll chamber is closed light-tightly by being attached. 2. The lens according to claim 1, wherein the cover member closes each bottom of the cartridge storage chamber and the film roll chamber in a light-tight manner by engaging the edge of the cover member with the edge of the rear cover. Film unit with. A main body base in which an exposure mechanism is incorporated, and a cartridge storage chamber for storing a cartridge, and a film roll chamber for storing a roll-shaped film roll in which a photographic film drawn from the cartridge is wound around a winding shaft And a manufacturing method of a lens-fitted photo film unit comprising a rear cover that covers the back side, and a front cover that covers the front side of the main body base.
The lid member that closes the bottom of each of the cartridge storage chamber and the film roll chamber is integrally formed with the front cover fixed to the front cover, and the cartridge is inserted into the cartridge storage chamber in the dark room, and then the film roll chamber is inserted into the film roll chamber. A first step of inserting the roll together with the take-up shaft, a second step of attaching the rear cover to the back surface of the main body base, and then removing the take-up shaft from the film roll; and the front cover on the front side of the main body base A method for producing a lens-fitted photo film unit, comprising: a third step of lightly sealing each of the bottoms of the cartridge storage chamber and the film roll chamber with a cover member of the front cover.

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