JP3614953B2 - Film loading jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is, off Ilm relates loaded jig again and again, more particularly full Ilm for loading jig you prevent film scroll is protruding-volute when pulling the shaft member from the film scroll inserted into the film scroll chamber again and again It is related.
[0002]
[Prior art]
A unit with a simple exposure mechanism is loaded with a photographic film with a cartridge in advance at the manufacturing stage to eliminate the need for loading and unwinding the photographic film. For example, “Sharun Super800” (trade name) ) Is commercially available. This unit main body is formed with a cartridge storage chamber for storing a cartridge, and a film scroll chamber for storing a film scroll in which a photographic film drawn from the cartridge is wound in a scroll form, and a main body base incorporating a simple exposure mechanism. And a front cover that covers the front side of the base of the main body and a lid that covers the bottoms of the cartridge storage chamber and the film scroll chamber are integrally formed via hinges to cover the back side of the main body in a light-tight manner. It consists of a rear cover.
[0003]
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 film winding shaft member, and the shaft member is rotated to wind up the photographic film in a scroll form to form a film scroll. The cartridge is inserted into the cartridge storage chamber at the base of the main body moved to the dark room, the tip end of the spool is engaged with the engagement shaft integrally formed with the winding knob, and then the film scroll is inserted into the film scroll chamber together with the shaft member. .
[0004]
A U-shaped notch through which the shaft member passes is formed in the bottom wall of the film scroll chamber. On the other hand, a protrusion having a semicircular cutout is integrally formed on the rear cover. When the rear cover is mounted on the back side of the base of the main body, the protrusion of the rear cover enters the U-shaped notch in the bottom wall of the film scroll chamber to form a substantially circular hole, and the shaft member projects outside from this hole. It will be in the state. Thereafter, when the shaft member is pulled out, the end face of the film scroll is restricted by the bottom wall of the film scroll chamber and the protrusion of the rear cover, and the film scroll remains in the film scroll chamber. After that, each lid portion of the rear cover is rotated about the hinge portion and pressed against the main body base side, so that each lid portion engages with each bottom portion of the cartridge storage chamber and the film scroll chamber, and each chamber is Closed light tightly. The film unit with lens is completed by covering the unit main body thus assembled with a paper outer case.
[0005]
[Problems to be solved by the invention]
By the way, when pulling out the shaft member from the film scroll, if the shaft member rubs against the edge of the hole, the edge of the hole is scraped to produce resin dust. For this reason, a clearance of about 0.5 mm is provided between the shaft member and the edge of the hole. However, due to this clearance, the innermost part where the film scroll is in close contact with the shaft member becomes a bamboo shoot from between the shaft member and the edge of the hole, and the phenomenon occurs that it protrudes out of the base of the main body. And it is a problem.
[0006]
The present invention has been made to solve such a problem, full film scroll Ru can be prevented protrude from the body base portion becomes a bamboo shoot shaped surely the film loading and Ilm loaded An object is to provide a jig for use.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a film loading jig according to the present invention is a film loading jig for a film unit with a lens used when loading a photographic film with a cartridge into a unit body in which an exposure mechanism is incorporated. a shaft member for creating a film scroll by winding the photo film drawn from Pas Torone in the scrolling mode, provided movably in the shaft member in the axial direction, provided with a film scroll shaft member per unit body film When the shaft member is pulled out from the film scroll after being inserted into the scroll chamber, the film pressing member is provided with a film pressing member that restricts the end face of the film scroll and causes the film scroll to remain in the film scroll chamber . The contact surface with which the end surface is contacted is flat. Those comprising a relatively thicker protrusion than the thickness of the bottom wall thickness of the film scroll chamber, withdrawing the protrusion after engaged with the notch formed in the bottom wall of the film scroll chamber, the shaft member from the film scroll I It is.
[0008]
Also, the film pressing members are those attached to the non-rotating about the shaft member.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 2, the unit main body 11 of the lens-fitted photo film unit has an exposure mechanism attached to the front, a main body base 15 for housing the photographic film 12 with a cartridge on the back side, and a rear cover 16 covering the back side. And the front cover 17 that covers the front side of the main body base 31.
[0011]
The main body base 15 has a film scroll chamber 22 for storing a film scroll 12a in which a photographic film 12 pulled out from the cartridge 20 is wound in a scroll form on both sides of the aperture 18, and a cartridge storage chamber 23 for storing the cartridge 20. Is formed. The film scroll chamber 22 is formed with a bottom wall 24 for regulating the position of the end face of the film scroll 12a. A substantially rectangular cutout 24a having a wide rear cover 16 side is formed at the center of the bottom wall 24. As will be described in detail later, the film scroll 12a can be inserted into the film scroll chamber 22 together with the film loading jig 25. It is like that. Two engaging claws 27 a and 27 b are formed on the bottom of the main body base 15. Two engaging claws 27 c and 27 d are formed above the main body base 15.
[0012]
On the left and right sides of the bottom side edge of the rear cover 16, lids 28 and 29 for closing the bottoms of the film scroll chamber 22 and the cartridge storage chamber 23 of the main body base 15 light-tightly by nail engagement are thin hinge portions. They are integrally formed via 31 and 32, respectively. In the bottom 33, engagement holes 33a and 33b are formed at positions corresponding to the engagement claws 27a and 27b. Further, engaging claws 34a and 34b are formed at positions corresponding to the engaging claws 27c and 27d.
[0013]
On the side of the front cover 17, notches 17 a and 17 b that are engaged with engagement claws 27 e and 27 f formed on the side of the main body base 15 are formed. Further, an engagement claw 17c is formed on the front back surface of the front cover 17, and is engaged with an engagement claw formed on the front portion of the main body base 15 (not shown).
[0014]
1 and 3, a film loading jig 25 includes a shaft member 36 that winds the photographic film 12 in a scroll form around a cylindrical tip portion 36a, and a substantially circular opening 37a formed in the center portion. And a donut-shaped film pressing member 37 attached to be freely movable in the axial direction of the shaft member 36. A slit 38 for inserting the front end portion of the photographic film 12 is formed at the front end portion 36 a of the shaft member 36. The slit 38 is formed to be slightly longer than the width of the photographic film 12.
[0015]
The edge portions 38a, 38b, 38c, and 38d of the slit 38 are formed in a chamfered shape in an arc shape except for the end portion 36c of the width D from the end surface 36b of the tip end portion 36a. The film pressing member 37 is formed with a pair of protrusions 37b and 37c projecting toward the center of the opening 37a, and these are formed by a space 39 formed by the edges 38a and 38b, and the edges 38c and 38d. Each of the spaces 40 is inserted. As a result, the film pressing member 37 does not rotate with respect to the rotation direction of the shaft member 36, and the protrusions 37b and 37c come into contact with the leading edge 36c without chamfering, so that the leading edge 36c serves as a stopper. Thus, the film pressing member 37 is prevented from inadvertently falling off the shaft member 36.
[0016]
On the surface of the film pressing member 37 on the most distal end portion 36c side, four convex portions 37d to 37g that have a smooth contact surface and restrict the end surface of the film scroll 12a are formed. Each of these has a corner shape and constitutes one square as a whole. On the other hand, the bottom wall 24 is formed with a trapezoidal cutout 24a having a slightly wide opening, and when the film scroll 12a is inserted into the film scroll chamber 22 together with the shaft member 36, as shown in FIG. 37d-37g is engaged in the notch 24a of the bottom wall 24 so that insertion or removal is possible. As a result, the film pressing member 37 does not rotate with respect to the bottom wall 24, and the shaft member 36 does not rotate. Therefore, the film scroll 12a wound around the film pressing member 37 does not rotate, and the amount of the photographic film 12 taken up when the film is loaded. Has the effect of not changing.
[0017]
Since the thickness D of the convex portions 37d to 37g is the same as the width D of the most distal portion 36c, as shown in FIG. 5B, in the state where the film pressing member 37 is moved most close to the most distal portion 36c. The contact surfaces of the convex portions 37d to 37g and the end surface 36b of the shaft member 36 are the same surface. Therefore, the film pressing member 37 can securely hold the end surface of the film scroll 12a until the shaft member 36 is completely pulled out from the film scroll 12a. Since the thickness D is set to be slightly larger than the thickness of the bottom wall 24, the film scroll 12a can be smoothly inserted into the film scroll chamber 22.
[0018]
Since the gap between the convex portions 37d to 37g and the peripheral surface of the shaft member 36 is set smaller than the thickness of one sheet of the photographic film 12, the contact surface of the convex portions 37d to 37g is provided on the end surface of the film scroll 12a. When the shaft member 36 is pulled out from the film scroll 12a in the contact state, the innermost photographic film 12 of the film scroll 12a that is in close contact with the peripheral surface 25b of the shaft member 36 becomes a bamboo cocoon shape and is outside the film scroll chamber 22. It is prevented that it protrudes into the surface.
[0019]
In order to assemble the unit main body 11, the photographic film 12 is pulled out from the cartridge 20 in the dark room, and this tip portion is inserted into the slit 38 of the tip portion 36 a of the shaft member 36. Then, the shaft member 36 is rotated so that the photographic film 12 is wound around the peripheral surface of the tip end portion 36a, thereby forming the film scroll 12a. The cartridge 20 is lowered from the state shown in FIG. 2, the cartridge 20 is inserted into the cartridge storage chamber 23, and the spool 42 of the cartridge 20 is engaged with the engagement shaft 44 a formed integrally with the winding knob 44. Next, the film scroll 12 a is lowered together with the shaft member 36, and the film scroll 12 a is inserted into the film scroll chamber 22 while the convex portions 37 d to 37 g are engaged with the notches 24 a.
[0020]
After engaging the projections 37d to 37g with the notch 24a, the shaft member 36 is pulled out from the film scroll 12a from the state shown in FIG. 5A while the film pressing member 37 is pressed against the bottom wall 24 with a jig or the like. Pull in the direction of the arrow. At this time, the end surface of the film scroll 12a is in contact with the convex portions 37d to 37g, so that the photographic film 12 does not protrude out of the film scroll chamber 22 in the shape of a bamboo shoot. In addition, the dotted line of the shaft member 36 shown in FIG. 5 represents the boundary line of the edge parts 38a-38d chamfered by circular arc shape.
[0021]
When the shaft member 36 is pulled to the state shown in FIG. 5B, the end surface 36b of the shaft member 36 becomes flush with the contact surfaces of the convex portions 37d to 37g, and the shaft member 36 is completely pulled from the film scroll 12a. As a result, the film scroll 12 a remains in the film scroll chamber 22. Thereafter, the pressure on the bottom wall 24 of the film pressing member 37 is released and the film loading jig 25 is removed, and then the rear cover 16 is put on the back side of the main body base 15 and pressed to the main body base 15 side. As a result, the engagement holes 33a and 33b of the rear cover 16 are engaged with the engagement claws 27a and 27b of the main body base 15, and the engagement claws 34a and 34b are engaged with the engagement claws 27c and 27d. The cover 16 is locked.
[0022]
Thereafter, the lid portions 28 and 29 of the rear cover 16 are rotated to close the film scroll chamber 22 and the cartridge storage chamber 23 in a light-tight manner. Subsequently, when the front cover 17 is put on the front surface side of the main body base 15 and pressed, the notches 17a and 17b of the front cover 17 are engaged with the engaging claws 27e and 27f of the main body base 15, and the main body base 15 is not shown. The engaging claw and the engaging claw 17 c of the front cover 17 are engaged, and the front cover 17 is locked to the front surface of the main body base 15. The unit main body 11 which has been loaded in this way is subjected to film winding and an exposure mechanism operation test, and then covered with an outer case to be completed as a lens-fitted film unit.
[0023]
In the embodiment described above, the convex portion of the film pressing member that is in contact with the end face of the film scroll has a rectangular shape as a whole. Therefore, the rotational angle position of the film scroll does not change when the film scroll is inserted, so Although there is an advantage that the amount to be taken does not change, the present invention is not limited to this. That is, the shape of the convex portion may be, for example, a circle or a polygon as long as the end face of the film scroll can be pressed almost evenly. When the convex portion is circular, it is preferable to regulate the rotational angle position of the shaft member so that the amount of photographic film taken up does not change.
[0024]
Also, the film scroll is inserted into the film scroll chamber together with the shaft member, and then the film pressing member is pressed against the film scroll chamber side. However, when the film scroll is inserted into the film scroll chamber, the film pressing member is moved to the film scroll chamber. It is good also as a structure latched by the bottom wall of this. In this case, after the shaft member is pulled out from the film scroll, the engagement between the film pressing member and the bottom wall of the film scroll chamber is released. In the above embodiment, the rear cover is mounted on the base of the main body after the shaft member is pulled out. However, the film loading jig may be pulled out of the film scroll after the rear cover is mounted. This embodiment is shown in FIG.
[0025]
In FIG. 6, triangular cutouts 52a, 52b, 54a, 54b are formed in the bottom wall 52 of the film scroll chamber 51 and the protrusion 54 of the rear cover 53, and the convex portions 37f, 37g, 37e, and 37d are fitted. Thereby, since the rotation of the film pressing member 37 is more reliably prevented, the film can be loaded while the rotation angle of the film scroll is kept constant.
[0026]
【The invention's effect】
As described above, according to the present invention, a shaft member for creating a film scroll by winding the photo film drawn from Pas Torone in the scrolling mode, provided to be movable to the shaft member in the axial direction, the film scroll After the shaft member is inserted into the film scroll chamber provided in the unit main body, when the shaft member is pulled out from the film scroll, the end surface of the film scroll is regulated to leave the film scroll in the film scroll chamber. Since it comprised, when extracting a shaft member from a film scroll, film loading can be performed, without the end surface of a film scroll projecting in the shape of a bamboo shoot.
[0027]
Further, the film pressing member has a convex portion that is flat on the abutting surface with the end surface of the film scroll and is slightly thicker than the thickness of the bottom wall of the film scroll chamber, and this convex portion is provided on the bottom wall of the film scroll chamber. Since the shaft member is pulled out of the film scroll after engaging with the formed notch, the film scroll can be smoothly inserted into the film scroll chamber, and the end surface of the film scroll stays inside the film scroll chamber. Therefore, the film scroll can be reliably left in the film scroll chamber.
[0028]
In addition, since the film pressing member is non-rotatably mounted around the shaft member, when the convex portion of the film pressing member is engaged with the notch in the bottom wall of the film scroll chamber, the shaft member is pulled out from the film scroll. The shaft member does not rotate at all after the film scroll is inserted into the film scroll chamber until the shaft member is pulled out. Accordingly, the amount of photographic film wound up does not change, and a photographic film having a constant length can be always loaded into the film scroll chamber .
[Brief description of the drawings]
FIG. 1 is an external perspective view showing a film loading jig of the present invention.
FIG. 2 is an exploded perspective view of a lens-fitted film unit that performs film loading using the film loading jig of the present invention.
3 is an explanatory view showing a relationship between a shaft member and a film pressing member shown in FIG. 1; FIG.
FIG. 4 is a cross-sectional view of the film scroll chamber showing the relationship between the convex portion of the film pressing member and the bottom wall of the film scroll chamber when the film scroll is inserted.
FIG. 5 is an explanatory view showing a relationship between a shaft member, a film pressing member, and a film scroll when the shaft member is pulled out from the film scroll.
FIG. 6 is an explanatory view showing an embodiment in which a notch in which a convex portion of the film pressing member is engaged is provided on the bottom wall of the film scroll chamber and the protrusion of the rear cover.
[Explanation of symbols]
11 Unit body 12 Photo film 12a Film scroll 15 Main body base 22 Film scroll chamber 24, 52 Bottom wall 24a, 52a, 52b, 52c, 52d Notch 25 Film loading jig 36 Shaft member 37 Film pressing member 37b, 37c Projection 37d ~ 37g Convex part 38 Slit 54 Protrusion part

Claims (2)

In a film loading jig for a film unit with a lens used for loading a photographic film with a cartridge into a unit body in which an exposure mechanism is incorporated,
A shaft member for creating a film scroll by winding the photo film drawn from Pas Torone in the scrolling mode,
Provided movably in the shaft member in the axial direction after inserting the film scroll the film scroll chamber provided on the shaft member per unit body, when pulling the shaft member from the film scroll, to regulate the end face of the film scroll the film scroll consists of a film pressing member to remain in the film scroll chamber Te,
The film pressing member has a convex portion whose contact surface with which the end surface of the film scroll abuts is a flat surface and whose thickness is slightly thicker than the thickness of the bottom wall of the film scroll chamber. A film loading jig , wherein the shaft member is pulled out from the film scroll after being engaged with a notch formed in a wall . The film pressing member, the film loading jig according to claim 1, characterized in that attached to the non-rotating about the shaft member.

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