JPH08201989A - Film unit with lens - Google Patents

Abstract

PURPOSE: To provide a film unit with a lens constituted so that it can not be resold by preventing the unit main body from being illicitly disassembled and is repacked with photographic film. CONSTITUTION: An engaging pawl 23 and a side surface engaging pawl 24 are respectively integrated with a back cover 6 at the left upper edge of the back cover 6. The engaging pawl 23 is engaged with an engaging part 19 provided on the inner surface of the top board 5b of a front cover 5 so as to couple the back cover 6, the front cover 5 and a main body part 4 between the covers 5 and 6. Since the engaging part between the engaging pawl 23 and the engaging part 19 is positioned inside the top board, it is not visually recognized at all from the outer surface of the unit main body after they are engaged.

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 which prevents the unit body of a lens-fitted film unit from being reused irregularly.

[0002]

2. Description of the Related Art A film unit with a lens widely sold by the applicant of the present invention (trade name "Sharan" is
It is sold in a state where an unexposed photo film is loaded in advance in a unit body incorporating a simple photographing mechanism and the like, and after use, it is collected together with the unit body at a developing station. At the photo lab, the exposed photographic film is taken out from the unit body for development and printing, but the unit body after use is not returned to the user.

The unit body is roughly divided into a body portion, a rear cover, a photographing mechanism, and a front cover. A film roll chamber and a cartridge chamber are formed in the main body, and a photographic film roll and a cartridge are incorporated into these chambers at the manufacturing stage. The rear cover is attached to the back surface of the main body, and covers the film passage from the film roll chamber to the cartridge chamber in a light-tight manner. The photographing mechanism incorporates a shutter mechanism and a film winding mechanism, and can be reused by removing it from the main body. The front cover is attached so as to cover the front surface and the upper surface of the main body.

The above-mentioned respective parts are connected to each other by claws, and the unit body recovered by the manufacturer after use is disassembled for each part. And some of the parts that are not damaged can be reused as they are, and most of these parts are molded plastic products, so even if they are extremely damaged and cannot be reused as they are, they are crushed and melted. Then, it can be used again as a raw material as a resin pellet. Further, with respect to the photographing mechanism, if a functional inspection is performed and there is no abnormality, the photographing mechanism can be reused as it is without removing the shutter mechanism or the film winding mechanism.

However, among these parts, the main body base and the rear cover are parts that come into direct contact with the film, so it is desirable to avoid reusing them after disassembly. This is because even slight damage to these parts can cause streak and scratches on the emulsion or base surface of the film, which can have an irreversible effect on the quality of the photographic image. For this reason, for the main body base and the rear cover,
After crushing and melting, it is only reused as a raw material.

[0006]

However, recently,
Other than the manufacturer that manufactures the lens-fitted photo film unit, a third party, mainly a developer, mainly removes the photo film from the photo lens film unit that the photographer requested for development and printing. There is a situation in which a new photo film cartridge is loaded and sold without permission.

If the unit body is reused without proper quality inspection of each part of the unit body to be reused and its function is not guaranteed, the newly loaded photo film may be damaged due to cracks, burrs, etc. generated in the unit body. May cause deterioration in photographic quality. Further, there is a possibility that the photographic film cannot be wound up due to a malfunction due to deterioration of the winding mechanism. In this way, by reloading and selling the photographic film cartridge without performing the necessary quality inspection, etc., it is one of the factors that adversely affects the general user such as reducing the reliability of the lens-fitted film unit. Has become.

The present invention has been made to solve such a problem, and provides a lens-fitted film unit having a structure in which the unit body is disassembled irregularly to refill the photographic film so that it cannot be sold again. The purpose is to

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a front plate of a front cover of a lens-fitted photo film unit with a grip part partially bulging in accordance with the contour of a cartridge chamber and an outer surface from an outer box. A wedge-shaped engaging portion is integrally provided with the top plate on the inner surface of the top plate of the front cover at the side where the patrone chamber is exposed, and the engaging portion is provided at a position corresponding to the grip portion of the upper portion of the rear cover. The engaging claws are provided to engage with each other to integrally engage the main body portion, the front cover, and the rear cover.

[0010]

2 is an external perspective view of a lens-fitted film unit according to the present invention, and FIG. 3 is an exploded perspective view of the unit main body. As shown in FIG. 2, the lens-fitted film unit 1 of the present invention comprises a unit body 2 and an outer box 3 that covers the outer surface of the unit body 2. Further, as shown in FIG. 3, the unit main body 2 is composed of a main body 4, a photographing mechanism 7, a front cover 5 and a rear cover 6 which are placed in front of and behind these, and a photographic film cartridge 8.

An exposure opening 11 which is an exposure light path is formed in the center of the main body portion 4, and a taking lens 12 is formed on the front surface thereof.
Shutter 13, viewfinder 14, and number-of-photographs display plate 1
A photographing mechanism 7 composed of 5 etc. is attached. Further, a cartridge chamber 16 and a film roll chamber 17 are formed near both ends of the exposure opening 11, and the cartridge main body 8a of the photographic film cartridge 8 and the unexposed photographic film 8b pulled out from the cartridge main body 8a are rolled. Each of the photographic film rolls 8c shaped like a light is stored in a light-tight manner.
A side engaging portion 20 is provided on the upper left side of the cartridge chamber 16 as shown in FIG. 1.

A front plate 5a and a top plate 5b are provided on the front side of the main body portion 4.
The front cover 5 is attached to cover the front surface and the upper surface of the main body 4. The front plate 5a of the front cover 5 is provided with openings for exposing the taking lens 12, the finder 14, and the like. The front cover 5 covers the cartridge chamber 16 of the main body 4 in the cartridge chamber 1
A grip part 5c having a partially bulged outer surface following the outer shape of 6
Are formed.

The top plate 5b covering the upper surface of the main body 4 is provided with an opening for partially exposing the number-of-photographs display plate 15, and a release button 18 is integrally provided on the left side. In addition, as shown in FIG. 1, a wedge-shaped engaging portion 19 is provided on the inner surface of a region 5d of the top plate 5b that covers the upper portion of the cartridge chamber 16 so that the wedge-shaped engaging portion 19 cannot be visually recognized from the outer surface of the top plate 5b. It is provided integrally with the plate 5b.

A rear cover 6 for covering the rear surface of the main body 4 is provided with a bottom cover 21 and a bottom cover 22 for the film chamber, which are integrated with the rear cover 6, respectively, and the bottoms of the chamber 16 and the film roll chamber 17 are respectively provided. Cover light tightly. Then, as shown in FIG. 1, at the upper left end of the rear cover 6, an engaging claw 23 and a side engaging claw 24 are provided integrally with the rear cover 6, respectively. The engaging claw 23 engages with the engaging portion 19 provided on the inner surface of the top plate 5b described above, and connects the rear cover 6 and the front cover 5 and the main body portion 4 therebetween. Since the engaging portion between the engaging claw 23 and the engaging portion 19 is located inside the top plate 5b, it is completely invisible from the outer surface of the unit body 2 after the engagement.

The side engaging claws 24 engage with the side engaging portions 20 provided on the main body 4 and connect the rear cover 6 and the main body 4. The side surface engaging portion 20 and the side surface engaging claw 24 can be visually recognized from the outside. The engaging claws 23 and the side engaging claws 24 are provided at right angles to each other so that the respective engagements cannot be easily released by an external force.

The outer box 7 is a cube whose one side surface is open, and is provided with openings for exposing the taking lens 12, the finder 14, and the like. The outer box 7 is placed on the unit body 2 from the right side, and as shown in FIG. 2, the right side of the grip portion 5c is covered. An area 5d that covers the grip portion 5c and the upper portion of the patrone chamber 16 of the top plate 5b is
It is provided to the user while being exposed without being covered by the outer box 7.

The operation of such a configuration will be described. The photo film cartridge 8 that has been exposed is taken out, and the lens-fitted photo film unit 1 that has been officially collected by the manufacturer is
The unit main body 2 after the outer box 3 is removed is disassembled into the front cover 5, the photographing mechanism 7, the main body 3, and the rear cover 6. In this disassembly work, a jig is inserted from the outside and the locking claws that separately connect the parts are elastically deformed,
The separation is easy. In the process of separating the front cover 5 and the rear cover 6 from the main body part 4 of this work, the engagement between the engagement portion 19 and the engagement claw 23 which are not exposed to the outside and the side engagement portion 20. The engagement between the side engaging claw 24 and the side engaging claw 24 is released.

First, the side engaging claw 24 is cut off from the root,
Remove from the rear cover 6. Thereby, the side engaging portion 20
The engagement between the side engaging claw 24 and the side engaging claw 24 is released. Next, the engaging claw 23 hidden on the inner surface of the top plate 5b is pressed downward by a thin plate-shaped jig to release the engagement between the engaging portion 19 and the engaging claw 23. Then, by pulling the rear cover 6 as it is, the front cover 5 can be removed from the main body 4 and the rear cover 6 without any damage, and the front cover 5 can be used as it is in the reassembly process after the inspection.

The separated front cover 5 and photographing mechanism 7 are
After the functional inspection and the appearance inspection are performed respectively, they are transported to the reassembly process and reused as they are. In addition, the rear cover 6 after the main body 4 and the side engaging claws 24 are cut,
It is sent to the melting process, returned to resin pellets, and used as a raw material for molding various parts.

On the other hand, the lens-fitted photo film unit 1 was not collected by a legitimate maker, and a new photo film cartridge was loaded into the unit main body 2 from which the exposed photo film cartridge 8 was taken out, and the film was attempted to be illegally reused. In this case, the side engaging claw 24 visible from the outside is lifted with a spatula or the like to release the engagement with the side engaging portion 20,
If the rear cover 6 is to be removed from the front cover 5 and the main body portion 4 as shown in (A), the engagement between the engaging claw 23 and the engaging portion 19, which cannot be visually recognized from the outside, becomes an obstacle, and FIG. As shown in B), the engaging claw 23 and the engaging portion 19 are destroyed.

When the engaging portion 19 is broken in this way, a breaking hole is opened in a region 5d which is exposed without being covered with the outer case 3 and covers the upper portion of the cartridge chamber 16 of the top plate 5b. ,
In addition to the loss of product value in appearance, the Patrone room 16
It will also be impossible to maintain the shading of, and reuse will be impossible. Further, when the engagement between the engaging claw 23 and the engaging portion 19 inside is recognized in advance, in order to remove the engaging claw 23 and the engaging portion 19 without damaging the engaging claw 23, the The side engaging claws 24 provided at the position must be cut from the root to release the engagement between the side engaging parts 20 and the side engaging claws 24. Cutting marks remain on the side of the unit that is exposed without being covered with 3, and the product value is also lost in appearance. Further, when the side engagement portion 20 and the side engagement claw 24 are disengaged from each other, the rear cover 6 easily comes off the main body portion 4, and it becomes difficult to maintain the light-shielding property, which also reduces the commercial value. .

In this way, if the rear cover 6 is to be removed from the front cover 5 and the main body portion 4 in order to reload the photographic film cartridge in the unit main body 2 in an attempt to illegally reuse the unit main body 2, Dovetail 23 and engaging portion 19
Since the unit is destroyed, the unit body 2 cannot be reused and refilling is prevented.

In the above embodiment, the entire grip portion of the unit main body is exposed without being covered with the outer box, but of course, only the top plate portion of the front cover provided with the engaging portion is not covered with the outer box. The effect is the same even when exposed to.

[0024]

As described above, according to the lens-fitted photo film unit of the present invention, the outer surface is exposed from the outer box together with the grip portion in which the front plate of the front cover is partially bulged according to the outer shape of the cartridge chamber. On the inner surface of the top plate of the front cover on the side of the patrone chamber, a wedge-shaped engaging portion is provided integrally with the top plate,
Further, since an engaging claw for engaging the engaging portion and integrally engaging the main body portion, the front cover and the rear cover is provided at a position corresponding to the grip portion on the upper portion of the rear cover, the unit main body is not damaged. It becomes impossible to disassemble the photographic film by regular disassembling, and it becomes possible to provide a film unit with a lens having a structure that cannot be resold irregularly.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the periphery of an engaging portion and an engaging claw of a lens-fitted film unit of the present invention.

FIG. 2 is an external perspective view showing a lens-fitted film unit of the present invention.

FIG. 3 is an exploded perspective view showing a unit body of the lens-fitted film unit of the present invention.

FIG. 4 is an explanatory sectional view showing changes in the engaging portion and the engaging claw when the lens-fitted film unit of the present invention is disassembled irregularly.

[Explanation of symbols]

 1 Film Unit with Lens 2 Unit Main Body 3 Outer Box 4 Main Body 5 Front Cover 5a Front Plate 5b Top Plate 6 Rear Cover 19 Engagement Part 20 Side Engagement Part 23 Engagement Claw 24 Side Engagement Claw

Claims (1)

[Claims] 1. A photographing mechanism having a shutter mechanism, a photographing lens, and the like, a main body portion provided with a cartridge chamber for accommodating a photographic film cartridge, a top plate covering the upper surface of the main body portion, and a front surface of the main body portion. A unit main body composed of a front cover integrally formed with a front plate forming a grip part of which the outer surface is partially bulged according to the outer shape of the cartridge chamber, and a rear cover covering the back surface of the main body part, In the lens-fitted film unit including an outer box that covers the outer surface of the unit body other than the grip section, a wedge-shaped inner surface of the top plate, the outer surface of which is exposed from the outer box together with the grip section, on the side of the cartridge chamber. Is provided integrally with the top plate, and is engaged with the engaging portion at a position corresponding to the grip portion on the upper portion of the rear cover to engage the main body portion, the front cover and the rear cover. Film unit, characterized in that a engagement claw to engage together and over.