JP2002341491A - Lens-fitted photographic film unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To weld a main body base part and a back cover without exerting influence on the shape and the dimension of outside appearance. SOLUTION: A 1st projecting piece 36 and a 2nd projecting piece 37 are provided near a finder 38 on the back of the main body base part 13. A 1st aperture 40 and a 2nd aperture 41 are provided on the back cover 15. When the cover 15 is assembled in the base part 13, the 1st and the 2nd projecting pieces 36 and 37 respectively pierce through the 1st and the 2nd apertures 40 and 41. The projecting parts of the 1st and the 2nd projecting pieces 36 and 37 are melted to weld and couple the base part 13 and the cover 15 near the finder 38. A tool insertion hole for ultrasonic welding is provided on the bottom face of the base part 13. A tool abutting surface opposed to the back of the base part 13 is provided in the tool insertion hole. Either tool is inserted in the tool insertion hole to abut on the tool abutting surface, and the other tool is ultrasonically welded while abutting on the cover 15. The base part 13 and the cover 15 are welded and coupled near the bottom face of the base part 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-fitted film unit that prevents unauthorized reuse.

[0002]

2. Description of the Related Art Various types of film units with lenses provided with a photographic film in advance and provided with a simple photographing mechanism have been sold. Used film units with lenses are collected by the manufacturer and reused or recycled for each component.

A film unit with a lens, which is manufactured on the premise of recycling, has a main body base in which a finder and a photographing mechanism are incorporated, and a rear surface of the main body base in order to prevent unauthorized reuse by a user or the like. And the cover is welded and bonded by ultrasonic welding at several places. Thus, when the rear cover is forcibly removed from the base of the main body, the rear cover and the base of the main body are damaged to prevent reuse.

By the way, in order to weld and bond the main body base and the rear cover by ultrasonic welding, it is necessary to sandwich the welded portion with a jig for ultrasonic welding. For this reason, in the above-mentioned lens-fitted film unit, a jig insertion hole is provided at the base of the main body, and a jig contact surface for contacting the jig is provided in the jig insertion hole. Ultrasonic welding is performed by inserting the jig into the jig insertion hole and abutting the jig abutment surface, and making the other jig abut the rear cover.

[0005]

However, in the above-described film unit with a lens, it is necessary to provide a jig insertion hole when performing ultrasonic welding, so that there is a restriction in designing the external shape.

Therefore, it is conceivable to perform impulse welding as a method of welding and joining the main body base and the rear cover without providing a jig insertion hole. In order to weld and bond the main body base and the rear cover by impulse welding, for example, a protruding piece protruding toward the rear cover is provided on the main body base, and an opening through which the protruding piece penetrates is provided on the rear cover. The melting can be performed by melting the projecting pieces.

However, in order to perform the impulse welding, it is necessary to penetrate the projecting piece into the opening of the rear cover. Therefore, when performing welding, external light may enter the base of the main body from a gap between the opening and the projecting piece. As a result, the loaded photographic film may be exposed. In order to prevent this, it is necessary to dispose the welded portion away from the film passage, but there is a problem that the film unit with the lens becomes large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lens-fitted film unit capable of securely welding and connecting a main body base and a rear cover without significantly affecting the external shape and external dimensions.

[0009]

In order to achieve the above object, a film unit with a lens according to the present invention is provided with a finder provided, a main body base provided with a film passage on the back side, and a main body base provided on the back side of the main body base. Assembled
A film unit with a lens, comprising: a rear cover for covering the film passage in a light-tight manner, wherein a projecting piece protruding toward the rear cover is integrally formed on the back of the main body base and near the finder, and An opening through which the protruding piece penetrates when the rear cover is assembled to the main body base is formed, and the protruding piece protruding from the opening is melted so that external light does not enter the film passage. Along with welding and bonding the rear cover, a jig insertion hole for ultrasonic welding is provided on the bottom surface of the main body base, and a jig contact surface facing the back surface of the main body base is provided in the jig insertion hole, By inserting one jig into the jig insertion hole and abutting the jig abutting surface and abutting the other jig on the rear cover, the main body base and the rear cover can be connected to the main body base. Near the bottom It is obtained by welding bound by ultrasonic welding so external light does not enter the beam path.

The finder is provided at a central portion above the base of the main body, the projecting pieces are provided at one place on both sides of the finder, and the jig insertion hole is provided at a central portion in the width direction of the base of the main body. Is preferred.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a film unit with a lens 10 comprises a unit body 11 and a label 12. FIG. The label 12 has an opening for exposing a photographic lens, a counter window, and the like, and partially covers the unit body 11. The unit main body 11 includes a main body base 13, a front cover 14, and a rear cover 15, and the front and rear of the main body base 13 are covered with a front cover 14 and a rear cover 15, respectively. The cartridge body and the rolled photographic film are loaded into the main body base 13 in the cartridge chamber 16 and the film roll chamber 1, respectively.
The exposure device 18 is provided between the cartridge chamber 16 and the film roll chamber 17.

As shown in FIGS. 1, 2 and 3, on the rear surface of the main body base 13, a locking member 19 is provided above and a first welding member 20 and a locking member 21 are provided below. On the inner wall of the rear cover 15, a locking member 22 is provided above and a second welding member 23 is provided below. Main body base 13
When the rear cover 15 is mounted on the lock member 22, the locking member 22 is fitted over the locking member 19 and locked. Further, the second welding member 23 fits between the locking member 21 and the first welding member 20, and the first welding member 20 fits between the second welding member 23 and the bottom surface 15 a of the rear cover 15. And lock it.

A film passage 25 through which a photographic film 24 passes is provided between the locking member 19 and the locking member 21. The photographic film 24 passes through the film passage 25 and an exposure range is defined by an aperture 28. Exposure is performed.

As shown in FIG. 4, a jig insertion hole 32 is provided on the bottom surface of the main body 13. The jig insertion hole 32 is formed according to the shape of the jig for ultrasonic welding.
A wall surface of the jig insertion hole 32 facing the back surface of the main body base 13 is a jig contact surface 32a. The first welding member 20 and the second welding member 23 are arranged on the opposite side of the jig contact surface 32a. First welding member 20 and second welding member 2
A welding portion 20a and a welding portion 23a are provided at the distal end of the jig 3, respectively. During ultrasonic welding, one jig is inserted into the jig insertion hole 32 and is brought into contact with the jig contact surface 32a. At the same time, the other jig is brought into contact with the rear cover 15 to melt the welded portion 20a and the welded portion 23a. Further, the bottom surface of the unit main body 11 is a portion to which the label 12 is attached, and the jig insertion hole 32 is covered with the label 12.

A first protruding piece 36 and a second protruding piece 37 are provided on the back side of the main body base 13. The first projecting piece 36 and the second projecting piece 37 are each provided with a finder 38.
It is arranged beside. Further, a finder window 39, a first opening 40, and a second opening 41 are formed in the rear cover 15, and the first opening 40 and the second opening 41 are respectively arranged on the side of the finder window 39. Finder window 3
From 9 the finder 38 is exposed outside the unit body.

The first protruding piece 36 is composed of a welding portion 36a and a stopper portion 36b. The first opening 40 includes an opening 40a and a step 40b. The opening 40a is formed to have a size that allows the welded portion 36a to penetrate therethrough. Stopper part 36b
Abuts against the inner wall surface of the rear cover 15 so that the welding portion 3
The amount of protrusion of 6a from the first opening 40 is limited. When the portion exposed to the outside of the welding portion 36a is melted, the molten resin is caused to flow into the step portion 40b,
The outer wall surface of the rear cover 15 is not made uneven.

As shown in FIG. 5, the second protruding piece 37 is composed of a pair of welding portions 37a and stopper portions 37b. The second opening 41 includes an opening 41a and a step 41b. The opening 41a is formed by a pair of welding portions 37a.
Are formed in such a size that they can penetrate, and each end portion is exposed to the outside of the unit main body 11 through the opening 41a. When the portions exposed to the outside of the pair of welding portions 37a are melted, the melted resin flows into the step portion 41b. The stopper portion 37b is provided at the opening 4 of the welding portion 37a.
Limit the amount of protrusion from 1a.

Next, the operation of the above configuration will be described. Main body base 13 conveyed by belt conveyor or the like
Then, the front cover 14 is assembled, and then the cartridge body is loaded into the cartridge chamber 16, and the photographic film 24 pulled out from the cartridge body and wound into a roll is loaded into the film roll chamber 17. Thereafter, the rear cover 15 is assembled to the main body base 13 to complete the unit main body 11. Attach the rear cover 15 to the base 13
When assembled, the first protruding piece 36 protrudes from the first opening 40 and the second protruding piece 37 protrudes from the second opening 41 and is exposed outside the unit body 11.

Next, one jig for ultrasonic welding is inserted into the completed unit main body 11 into the jig insertion hole 32 and is brought into contact with the jig abutment surface 32a, while the other jig is placed in the rear. It comes into contact with the cover 15. And the first by ultrasonic welding
The welding portion 20a of the welding member 20 and the welding portion 23a of the second welding member 23 are melted, and the main body base 13 and the rear cover 15 are welded and connected near the bottom surface of the main body base 13. In addition, although the bonding force is stronger when performing impulse welding than when performing ultrasonic welding, in order to perform impulse welding, a projecting piece is provided in the main body base 13, and an opening corresponding thereto is provided in the rear cover 15. There must be. And the film passage 2
In consideration of the light-shielding property of the unit 5, the projecting pieces and the openings must be provided at positions distant from the film passage 25, and when the impulse welding is performed, the size of the unit main body 11 cannot be avoided. For this reason, the main body base 13 and the rear cover 1
5 is welded and bonded near the bottom surface of the main body base 13 by ultrasonic welding, so that the unit main body 11 can be prevented from being enlarged. Although the welded portion is near the film passage 25, the external light is transmitted by the ultrasonic welding to the film passage 2.
There is no possibility that the loaded photographic film 24 invades the inside of the photo film 5. Further, since the jig insertion hole 32 is provided on the bottom surface of the main body base 13 and the ultrasonic welding is performed only at one location near the bottom surface of the main body base 13, restrictions in designing the appearance of the film unit with lens 10 are limited. Can be reduced.

Thereafter, the welded portion 36a of the first projecting piece 36 and the welded portion 37a of the second projecting piece 37 are formed by impulse welding.
Is melted, and the main body base 13 and the rear cover 15 are welded to each other. Since a feed mechanism for the photo film 24 and the like are arranged on the side of the finder 38, a jig insertion hole for ultrasonic welding is provided, and it is impossible to perform ultrasonic welding. Since the side is away from the film passage 25, even if the impulse welding is performed, the film passage 2
There is no possibility that outside light will enter the 5. Further, since the impulse welding is performed on the side of the finder 38, the unit main body 11 does not need to be enlarged.

A label 12 is attached to the unit body 11 after the welding is completed, and the film unit 1 with lens is attached.
0 is completed. Since the jig insertion hole 32 is not exposed to the outside by attaching the label 12, the external design of the film unit with lens 10 is not spoiled.

A user who has purchased the film unit with lens 10 passes the used film unit with lens 10 directly to a developing dealer, and requests development and print processing. There is a case where the rear cover 15 is removed from the main body base 13 and an unused film cartridge is loaded into the main body base 13 to be reused.

However, the main body base 13 and the rear cover 1
5 and one in the vicinity of the bottom surface of the main body base 13 and the finder 3
8, it is difficult to remove the rear cover 15 from the main body base 13 because it is welded to each side.
Even if the rear cover 15 is forcibly removed, the
Alternatively, since the rear cover 15 is damaged, the film unit with lens 10 cannot be reused. This can prevent the user from reusing the lens-fitted film unit 10.

In the above embodiment, the impulse welding is performed after the ultrasonic welding is performed. However, the impulse welding may be performed first. Further, the shapes of the first welding member 20, the second welding member 23, the first projecting piece 36, and the second projecting piece 37 may be appropriately formed. Further, the impulse welding was performed at two places on the side of the finder 38.
May be performed at any suitable location as long as outside light does not enter the film passage 25 in the vicinity of. The ultrasonic welding was performed at one location near the bottom surface of the main body base 13, but may be performed at an appropriate location near the bottom surface of the main body base 13 as long as external light does not enter the film passage 25.

[0025]

As described above, according to the present invention, a projecting piece protruding toward the rear cover is integrally formed on the rear surface of the main body base and near the finder, and the rear cover is attached to the main body. By forming an opening through which the projecting piece penetrates when assembled to the base, and by melting the projecting piece projecting from this opening, the main body base and the rear cover are welded and joined so that external light does not enter the film passage. At the same time, a jig contact surface facing the back of the main body base is provided in a jig insertion hole on the bottom surface of the main body base, and one jig is inserted into the jig insertion hole and brought into contact with the jig abutment surface, By bringing the other jig into contact with the rear cover, the main body base and the rear cover were welded and bonded by ultrasonic welding near the bottom surface of the main body base so that external light did not enter the film passage. Significant influence on external shape and external dimensions Without giving, a rear cover and the body base can be reliably welded bond, thereby preventing irregular reuse of film unit.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a film unit with a lens embodying the present invention.

FIG. 2 is a sectional view showing a first projecting piece of a main body base and a first opening of a rear cover.

FIG. 3 is a cross-sectional view showing a positional relationship between a first welding member and a second welding member and a jig insertion hole.

FIG. 4 is a perspective view showing a bottom surface of the unit main body 11;

FIG. 5 is a sectional view showing a second projecting piece of a main body base and a second opening of a rear cover.

[Explanation of symbols]

 Reference Signs List 10 Film unit with lens 13 Body base 15 Rear cover 20 First welding member 23 Second welding member 24 Photo film 25 Film passage 32 Jig insertion hole 32a Jig contact surface 36 First protruding piece 37 Second protruding piece 40 First 1 opening 41 2nd opening

Claims (2)

[Claims] 1. A film unit with a lens, comprising: a main body base provided with a finder and a film passage on the back surface; and a rear cover assembled to the back surface of the main body base and covering the film passage in a light-tight manner. In the back of the main body base and near the finder, a protruding piece protruding toward a rear cover is integrally formed, and the protruding piece penetrates the rear cover when the rear cover is assembled to the main body base. An opening is formed, and a projecting piece protruding from the opening is melted, so that the main body base and the rear cover are welded and connected so that external light does not enter the film passage. A jig insertion hole for welding is provided, a jig abutment surface facing the back surface of the main body base is provided in the jig insertion hole, and one jig is inserted into the jig insertion hole. By contacting the jig contact surface and the other jig against the rear cover, the main body base and the rear cover are kept close to the bottom surface of the main body base so that external light does not enter the film passage. A lens-fitted film unit characterized by being welded and bonded by ultrasonic welding. 2. The finder is provided at a central portion above the base of the main body, the projecting pieces are provided one by one on both sides of the finder, and the jig insertion hole is provided at a central portion in the width direction of the base of the main body. The film unit with a lens according to claim 1, wherein: