JPH0743859A - Film unit with lens and its production - Google Patents

Abstract

PURPOSE:To prevent a rear cover from being inadvertently separated from a main body base part, to eliminate the need of troublsome preprocessing, and to realize recycling at low cost. CONSTITUTION:In order to shield the back surface and the base of the main body base part 11 from light, the L-shaped rear cover 13 is locked in the base part 11 by engagement through a pawl. At such a time, the edge part of the base part 1 is fitted in the groove of the cover 13. Thereafter, light shielding adhesive is injected from an adhesive injection port 34 and the cover 13 is fixed on the base part 11 so that it can not be attached/detached. By exerting force so as to peel the back surface part 13a of the cover 13, in the case of recycling, the cover 13 is ruptured from a groove 40, and removed from the base part 11. By removing a front cover 12 from the base part 11, an exposure unit and a stroboscopic unit are removed. Both units are recycled after test. Since the light shielding adhesive is made of the same resin as the base part 11, the base part 11, the front cover 12 and the rear cover 13 are dissolved to be a pellet as they are.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens, which is preloaded with a film and has a photographing mechanism for exposing the film, and a method for manufacturing the film unit.

[0002]

2. Description of the Related Art A lens-fitted film unit with a built-in photo film and a simple shooting function is provided so that you can easily take pictures even when you are not carrying a camera. A copy of Run Econoshot ”is marketed by the applicant. From the viewpoint of environmental protection and reduction of industrial waste, this lens-fitted film unit is thoroughly cleaned so that the unit body after removing the film cartridge is collected at the manufacturer's factory so that necessary parts can be reused. The unitization is done. That is, the unit body includes an exposure unit including a taking lens, a shutter, a counter mechanism, a finder, a strobe unit including a light emitting unit and a strobe circuit, a cartridge chamber in which the cartridge body is mounted,
A film roll chamber for accommodating the film in a roll shape is formed, a main body base to which the exposure unit and the strobe unit are attached, a front cover mounted on the front side of the main body base, and a rear cover mounted on the rear side of the main body base. And are detachably attached by claw engagement.

The unit main body after the used film is taken out is disassembled into an exposure unit, a strobe unit, a main body base, a front cover and a rear cover. The shutter unit and strobe unit are subjected to a cleaning process after being inspected, and if no abnormality is found, they are reused as they are. Also, there are many parts where the front and rear covers, which are easily damaged when disassembling the unit body, directly contact the film such as the film roll chamber and film rail.If these parts are dirty or scratched, the film will be damaged. The base of the main body, which leads to a serious accident of attaching, is melted, pelletized and reused as a raw material.

[0004]

By the way, since the film is loaded between the main body base and the rear cover, it is necessary that these be light-tightly closed and not separated carelessly. However, as described above, since only the claw engagement that is easy to assemble is adopted as the means for attaching the rear cover to the main body base, for example, the rear cover may be separated from the main body base due to careless handling by the user. was there. As a means for improving this, for example, a method of fixing the main body base and the rear cover inseparably using an adhesive may be considered. However, when the main body base and the rear cover are melted, pelletized and reused. First, this adhesive needs to be removed. In order to remove the adhesive, a troublesome pretreatment such as scraping off the adhesive-attached portions of both the main body base portion and the rear cover is required, which is a problem in terms of cost.

The present invention has been made to solve the above problems, and prevents the rear cover from being inadvertently separated from the base portion of the main body, and at the same time, hassles such as scraping off the portion to which the adhesive is attached. It is an object of the present invention to provide a lens-fitted film unit which can be recycled at a low cost without requiring any pretreatment, and a manufacturing method thereof.

[0006]

In order to achieve the above object, a lens-fitted film unit according to claim 1 is provided with:
When the protrusion of the main body base is fitted into the groove of the rear cover and fixed, and when an external force is applied to the rear cover to separate the rear cover from the main body base, the rear cover is irreversibly destroyed from the groove. It was done like this.

In the lens-fitted film unit according to a second aspect of the present invention, an adhesive injection port is provided in at least one position of the rear cover, and after the rear cover is covered on the main body, an adhesive having a light shielding property from the adhesive injection port. Is injected to fix the rear cover to the base of the main body.

According to another aspect of the present invention, there is provided a lens-fitted photo film unit, wherein a main body base on which a photographic film is loaded, a rear face part covering the rear face of the main body base and a bottom face part covering the central bottom face of the main body base form an L shape. The rear cover integrally formed with the rear cover and the rear cover are formed in the substantially central portion in the vicinity of the intersection of the back surface portion and the bottom surface portion of the rear cover.
Lined in parallel to the line where the back cover and the bottom part of the rear cover intersect and the back part close to the adhesive injection port, and the adhesive injection port that injects a light-shielding adhesive to fix the rear cover to the main body It is composed of a thin part formed on
When an external force is applied to the rear cover to separate the rear cover from the base of the main body, the rear cover is irreversibly destroyed from the thin portion.

The lens-fitted film unit according to a fourth aspect of the present invention is the lens-fitted film unit according to the second and third aspects, wherein a part of the base of the main body located below the adhesive injection port is injected from the adhesive injection port. A groove is formed to prevent unnecessary diffusion of the adhesive thus formed.

The film unit with lens according to claim 5 is the film unit with lens according to claims 2 and 3, wherein the adhesive is a light-shielding gel-like resin of carbon-containing styrene.

According to a sixth aspect of the present invention, there is provided a lens-fitted film unit manufacturing method, wherein an adhesive injection port is provided in at least one part of the rear cover, the rear cover is covered with the main body, and the light shielding property is provided from the adhesive injection port. The adhesive that is included is injected to fix the rear cover to the base of the main body.

[0012]

Operation: The main body base is covered with the rear cover, and the projections of the main body base are fitted into the grooves of the rear cover and fixed. When an external force is applied to the rear cover to separate the collected rear cover of the lens-fitted film unit from the base of the main body, the rear cover is irreversibly destroyed from the groove. Further, after the rear cover is placed on the main body base, the light-shielding adhesive is injected from the adhesive injection port. The adhesive enters the groove formed in the main body base to fix the main body base and the rear cover. At this time, since the adhesive does not infiltrate into the portion other than the groove portion, the adhesive does not adhere to the film feeding path or the like. Also,
Since the adhesive is a light-blocking gel resin of carbon-containing styrene, external light does not enter from the adhesive injection port. Also, since this adhesive becomes a resin similar to the main body base and the rear cover after the solvent volatilizes, when melting and pelletizing the main body base and the rear cover, the part to which the adhesive adheres is scraped off. It is not necessary to perform troublesome pretreatment such as, and it is possible to contribute to the reduction of the recycling cost.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2 showing the external appearance of a lens-fitted film unit of the present invention, a lens-fitted film unit 1
Is composed of a unit body 2 equipped with a photographing mechanism and an outer case 3 for housing the unit body 2. Outer case 3
Is for cleaning the appearance of the lens-fitted film unit 1, and a paper box or the like having an outer surface printed is used. The outer case 3 is provided with holes for exposing the release button 4, the winding knob 5, the objective side viewfinder window 6, the eyepiece side viewfinder window 7, the lens hood 8, the film counter 9, and the stroboscopic light emitting section 10. You can take a photo while it is still in Case 3.

In FIGS. 1 and 3, the unit main body 2
Is composed of a main body base 11, a front cover 12, a rear cover 13, an exposure unit 14, and a strobe unit 15, which are detachably attached by claw engagement. Main body base 11, front cover 12, rear cover 13
Are integrally molded of plastic. The main body base 11 has a cartridge storage chamber 17 for storing the cartridge 16, a film roll chamber 19 for storing the unexposed film 18 drawn from the cartridge 16 in a roll shape, and an exposure chamber arranged between them. A frame 20 is provided. The exposure frame 20 is curved to correct the distortion of the taking lens 21, and an exposure opening 20a for guiding the light passing through the taking lens 21 to the film 18 is formed.

The back surface of the main body base 11 and the bottom surfaces of the cartridge storage chamber 17 and the film roll chamber 19 are open. A rear cover 13 is attached to the main body base 11 and the front cover 12 to shield the back side and the bottom side from light. Engaging claws 22 and 23 that engage with the rear cover 13 are integrally formed on the bottom 11 a of the main body base 11. Engagement holes 26 and 27 that engage with the engagement claws 24 and 25 of the rear cover 13 are formed in the upper portion of the front cover 12, respectively.

The rear cover 13 comprises a rear surface portion 13a and a bottom surface portion 13b, which are applied to the rear surface of the main body base portion 11, and is entirely L-shaped. Inside the back surface portion 13a, a film support portion 28 is integrally molded so that the central portion is recessed in accordance with the curved surface of the exposure frame 20. The bottom surface portion 13b is composed of an openable / closable cover plate 29 that shields the bottom surface of the cartridge storage chamber 17, a cover plate 30 that abuts the bottom portion 11a of the main body base 11, and a cover plate 31 that shields the bottom surface of the film roll chamber 19. There is. Engagement holes 32 and 33 are formed in the central cover plate 30 at positions corresponding to the engagement claws 22 and 23, respectively. In this way, the engagement holes 26, 27
And projections 24 and 25, engaging claws 22 and 23 and engaging hole 3
With the engagement of 2 and 33, the rear cover 13 is locked to the main body base 11 and the front cover 12.

An adhesive injection port 34 is formed near the cover plate 30 on the back surface 13a, and the rear cover 13 is formed.
After locking the rear cover 13 to the main body base 11 and the front cover 12, a light-shielding adhesive is injected from here to attach the rear cover 13 to the main body base 1.
Stick to 1. As the light-shielding adhesive used for this purpose, for example, a light-shielding gel-like resin of carbon-containing styrene is used.

As shown in FIG. 4, a groove 35 is formed in the lower portion of the adhesive injection port 34 inside the rear cover 13,
When the rear cover 13 is put on the main body base 11, the groove 35 is fitted into the edge portion 36 of the bottom portion 11 a of the main body base 11. Further, the main body base 11 is exposed to external light by the exposure frame 2.
The groove 3 together with the light-shielding rib 37 for preventing leakage to the 0 side
8 is formed. This groove 38 is formed by the adhesive injection port 34.
The light-blocking adhesive injected from is received to prevent the light-blocking adhesive from diffusing to other parts.

A groove 40 is formed in the vicinity of the adhesive injection port 34 in parallel with the corner 39 of the rear cover 13. The groove 40 is to reduce the thickness of the back surface portion 13a so that the rear cover 13 can be easily broken from this portion, and has a V-shaped, U-shaped, arc-shaped cross-sectional shape or the like. ing.
Therefore, when removing the rear cover 13, the upper portion 13b of the rear surface portion 13a is fixed to the front cover 12 with a jig such as a screwdriver or a finger.
When a strong force is applied so that the engaging claws 24,
25 is disengaged from the engagement holes 26 and 27, and the back surface portion 13a is easily bent or damaged from the groove 40, so that the back surface portion 13a can be removed from the main body base portion 11 and the front cover 12. it can.

The cover plate 29, as shown in FIG.
9 is thinly formed so that it can be rotated about this. The projection 41 and the engaging claws 42 and 43 are integrally formed at the free end of the cover plate 29.
On the other hand, projections 44 and 45 having tapered end surfaces are formed on the portions of the front cover 12 corresponding to the engaging claws 42 and 43. Therefore, when the cover plate 29 is rotated and pressed toward the main body base 11, the engaging claws 42 and 43 are projected.
4, the cover plate 26 is engaged with the front cover 12 by engaging with the front cover 12, and the cartridge storage chamber 15 is light-tightly closed. Further, when a driver or the like is hooked on the protrusion 41 and a strong force is applied to the front side, the engagement between the engaging claws 42, 43 and the protrusions 44, 45 is released, the cover plate 29 is opened, and the cartridge 16 can be taken out. it can.

Like the cover plate 29, the cover plate 31 also has a corner 3
The cover plate 31 can be rotated about
An engaging claw 31a is formed at the free end of the. A tapered engaging portion 46 is formed on a portion of the front cover 12 corresponding to the engaging claw 31a. That is, if the cover plate 31 is rotated and pressed toward the main body base 11,
The engaging claw 31a engages with the engaging portion 46, the cover plate 31 is locked to the front cover 12, and the film roll chamber 19 is light-tightly closed.

Next, the production of the lens-fitted film unit 1 will be briefly described. First, the exposure unit 14 and the strobe unit 15 are attached to the main body base 11, and then the front cover 12 is attached in front of the main body base 11.
After attaching the front cover 12, the dry battery 47 for strobe charging is inserted into the electrode portion of the strobe unit 15. Then, the unexposed film 18 is pulled out from the cartridge 16 to form a roll-shaped film roll 18a. The film 18 has a spool shaft 16 of the cartridge 16 at the rear end.
It is fixed to a. The cartridge 16 is inserted into the cartridge storage chamber 17, and the film roll 18a is inserted into the film roll chamber 19, respectively. After loading this film,
The rear cover 13 is attached to the main body base 11 and the front cover 12 to shield the back and bottom surfaces of the main body base 11 from light.

When the rear cover 13 is mounted, if the rear surface portion 13a of the rear cover 13 is pushed toward the main body base portion 11, the engaging claws 24 and 25 of the rear cover 13 are fitted into the engaging holes 26 and 27 of the front cover 12. While engaging, the engaging holes 32 and 33 of the cover plate 30 engage with the engaging claws 22 and 23 of the main body base 11. At this time, the edge portion 36 of the main body base 11 has the rear cover 1
3 is inserted into the groove 35. Next, if the cover plate 29 is pushed toward the bottom of the cartridge storage chamber 17, the engaging claws 4
2 and 43 are engaged with the protrusions 44 and 45, respectively, and the cartridge storage chamber 17 is light-tightly closed. Furthermore, the cover plate 3
If you push 1 toward the bottom of the film roll chamber 19,
The engagement claw 31a engages with the engagement portion 46, and the film roll chamber 19 is light-tightly closed.

After that, the groove 35 of the rear cover 13 is fixed to the edge 36 of the main body base 11 by injecting an appropriate amount of the light-shielding adhesive from the adhesive injection port 34. At this time, the light-shielding adhesive is received by the groove 38 and does not spread to other parts. Further, since the adhesive injection port 34 is closed by the light-shielding adhesive, outside light does not leak inside from there. The film loading and the mounting of the rear cover 13 are performed in a dark room. In this way, the unit body 2 is assembled and then packaged in the outer case 3. Each of these steps can be performed by an automatic assembly machine.

When photographing, the unit body 2 is put in the outer case 3. When the release button 4 is pressed, the shutter operates and the photographing light transmitted through the photographing lens 21 enters the film 18 located behind the exposure opening 20a. When the winding knob 5 is rotated after photographing, the exposed portion of the film 18 is wound into the cartridge 16 and the unexposed portion is set behind the exposure opening 20a. When all frames have been shot, the film 18
Is caught in the cartridge 16.

The film unit with lens 1 for which photographing has been completed is submitted to a photo lab for photographic printing. At the developing station, after the paper box 3 is peeled off from the unit body 2, the cover plate 29 is opened and the cartridge 16 is pulled out from the bottom surface of the cartridge storage chamber 17. The cartridge 16 is sent to a photo processing step. The empty unit body 2 from which the cartridge 16 has been taken out is returned to the manufacturer or the like for reuse.

At the manufacturer, the rear cover 13 is removed from the main body base 11. In this removal, the engagement between the engaging claws 24 and 25 and the engaging holes 26 and 27 is released by applying a force to the rear surface 13a of the rear cover 13 so that the rear surface 13a is grooved. Deform from 40. If force is continuously applied to the back surface portion 13a,
Since the edge portion 36 of the main body base 11 is fitted in the groove 35 of the rear cover 13 and these are fixed by the light-shielding adhesive, the back surface portion 13 a is bent from the groove 40. After that, by applying a peeling force to the cover plate 31, the engaging claw 31a is disengaged from the engaging portion 46, and the engagement between the front cover 12 and the rear cover 13 is released. After that, when the front cover 12 is peeled off from the main body base 11, the exposure unit 14 and the strobe unit 15 can be removed from the main body base 11.

The photographing function test of the exposure unit 14 and the charge and light emission test of the strobe unit 15 are performed. If the results are normal, they are each reused. The exposure unit 14 is mounted on a new main body base after adjusting the film counter 9 to return the scale to the initial value. Also,
The dry battery 47 for strobe charging is replaced with a new one,
Used items are collected and discarded or returned to the battery manufacturer.

The main body base 11, the front cover 12, and the rear cover 13 are melted and pelletized, and reused as a raw material for molding the main body base, the front cover, the rear cover, and the like. At this time, the light-shielding adhesive remains attached to the main body base 11 and the rear cover 13, but the light-shielding adhesive is the same resin as the molding raw material of the main body base 11 and the like because the solvent has already evaporated. Therefore, the light-shielding adhesive can be dissolved as it is without performing a pretreatment such as scraping off.

In the embodiment described above, the groove 40 is not formed to the left and right ends of the back surface portion 13a, but it may be extended to the left and right ends. On the contrary, for example, the cover plate 30
The length of the groove 40 may be shortened according to the width of the groove. In addition,
Although the rear cover is fixed to the base of the main body with the adhesive in the above embodiment, the adhesive may not be necessarily used. In this case, the fitting between the groove 35 and the edge 36 is made firm. Alternatively, they may be welded using a means such as ultrasonic welding. Further, although the groove 40 is provided on the outer side of the rear cover, it may be omitted. In this case, the rear cover 13 is destroyed from the groove 35.

[0031]

As described in detail above, in the lens-fitted photo film unit of the present invention, the main body base and the rear cover are fixed by the light-shielding adhesive or the projection and the groove. There is no need to worry about the careless removal of the rear cover from the base of the main unit. In addition, since the light-shielding adhesive becomes a resin similar to the material of the main body base and the back cover after the solvent is volatilized, troublesome processing such as scraping off the part to which the adhesive is attached is unnecessary, and low recycling is achieved. It can contribute to cost reduction. In addition, since the light-shielding adhesive does not enter the portion other than the groove due to the groove formed in the base of the main body, it is possible to prevent accidents such as the adhesive adhering to the film feeding path or the like. . Further, since a thin wall portion is provided in a part of the rear cover so that the rear cover can be easily broken from here, disassembly is facilitated and it is possible to contribute to reduction of recycling cost. Further, according to the method for manufacturing a lens-fitted film unit of the present invention, after the rear cover is covered on the main body base, the light-shielding adhesive is injected from the adhesive injection port to fix the rear cover to the main body base. The rear cover can be easily and reliably fixed to the main body base.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a unit main body of the present invention viewed from the back side.

FIG. 2 is a perspective view showing a state where the unit main body shown in FIG. 1 is housed in an outer case.

FIG. 3 is an exploded perspective view of a unit body showing an exposure unit and a strobe unit.

FIG. 4 is a side sectional view showing a fitting portion between a main body base and a rear cover in the vicinity of an adhesive injection port.

FIG. 5 is a perspective view showing the unit main body from the back side.

[Explanation of symbols]

 1 Film Unit with Lens 2 Unit Main Body 11 Main Body 12 Front Cover 13 Rear Cover 13a Back Side 14 Exposure Unit 15 Strobe Unit 22, 23, 24, 25, 31a, 41, 42 Engaging Claws 26, 27, 32, 33 Engagement Dowel hole 34 Adhesive injection port 35, 38, 40 Groove 36 Edge 37 Light-shielding rib

Claims (6)

[Claims] 1. A main body base on which a photographic film is loaded,
In a lens-fitted film unit having a rear cover attached to the main body base so as to shield the main body base, a protrusion of the main body base is fitted into a groove of the rear cover and fixed, and the rear cover is separated from the main body base. Therefore, when an external force is applied to the rear cover, the rear cover is destroyed from the groove so that it cannot be reused. 2. A main body base on which a photographic film is loaded,
In a lens-fitted film unit having a rear cover attached to the main body so as to shield the main body from the light, an adhesive injection port is provided in at least one of the rear covers, and the rear cover is put on the main body. A lens-fitted film unit characterized in that a light-shielding adhesive is injected from an adhesive injection port to fix the rear cover to the main body. 3. A main body base on which a photographic film is loaded,
The rear cover that covers the rear surface of the main body base and the bottom surface that covers the central bottom surface of the main body base are integrally formed to have an L shape, and almost the vicinity of the line where the rear surface and the bottom surface of the rear cover intersect. An adhesive injection port that is formed in the center part and covers the rear cover on the main body base, then injects a light-shielding adhesive to fix the rear cover to the main body base, and the back cover and the bottom surface of the rear cover intersect. It is composed of a thin walled part that is formed in a line shape on the back surface near the adhesive injection port in parallel with the line, and when an external force is applied to the rear cover to separate the rear cover from the main body, A lens-fitted film unit, wherein the rear cover is irreversibly destroyed from the thin portion. 4. A groove portion for preventing unnecessary diffusion of the adhesive injected from the adhesive injection port is formed in a part of the main body base located below the adhesive injection port. The film unit with a lens according to claim 2 or 3. 5. The lens-fitted film unit according to claim 2, wherein the adhesive is a light-blocking gel resin of carbon-containing styrene. 6. A method of manufacturing a film unit with a lens, wherein a light-shielding rear cover is fixed to a main body base loaded with a photographic film, wherein an adhesive injection port is provided in at least one of the rear cover, and the rear cover is provided. A method of manufacturing a lens-fitted film unit, characterized in that after covering the main body base, an adhesive having a light shielding property is injected from an adhesive injection port to fix the rear cover to the main body base.