JPH10288827A - Film unit with lens, production of case member for it and identification method of it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change the appearance, without need for an expensive metallic mold such as a cover by covering the circumferential part of a photographic lens with a decorative member for ornament. SOLUTION: The decorative member 11 for the ornament is fitted to a unit body 1 covered with a front cover 12 and a rear cover 13. In the front cover 12, a through-hole 12a is provided for an incident luminous flux on the photographic lens L and on the decorative member 11 a through-hole 11a larger than the through-hole 12a is provided. Further, a circular projecting part 12b is provided and fitted in the through-hole 11a. On the other hand, a square through-hole 12c for the luminous flux made incident on a finder is provided above the projecting part 12b of the front cover 12 and the circumference of the through-hole 12c is surrounded by a frame 12d. The frame 12d is fitted in a square through-hole 11b provided in the decorative member 11. Thus, even in the case the decorative member 11 is made glossy or colored to have an easy-to-reflect appearance, when only the circumferences of the through-holes 12a and 12c are made matt, influence on a finder optical system is prevented.

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 has been loaded with an unexposed film in advance.

[0002]

2. Description of the Related Art A lens-fitted film unit has a reduced number of parts and a simplified assembly. For this purpose, the front cover that covers the front surface also has a positioning portion with the main body, an engaging claw that engages with the main body, and the like in an integrated manner. For the above reasons, holes may be formed in the outer surface. Since it is very unsightly if a hole is formed on the outer surface of the external component such as the front cover, a paper cover or a label is further attached to the conventional film unit with a lens to cover the hole.

[0003] Further, since the conventional exterior member is formed by a side gate or a pin gate, a gate cut mark may remain or a weld line may be generated, resulting in an unsightly appearance.

Further, in the case of a film unit with a lens, two types of products having the same appearance are sometimes sold by loading films having different numbers of shots. In this case, the color of the character of the exponent is changed. I was different. In some cases, the screen size was determined by changing the image frame and the viewfinder frame to determine the screen size, and then changing from the standard size to the panorama size or high-definition size. The differences were different.

[0005]

Since the film unit with the lens is inexpensive, it is suitable for a premium or the like.
For this reason, it is sometimes necessary to produce products whose appearance is changed only. OEMs that other companies sell under different brands
It may be a product. At this time, there is no significant difference in appearance from the original product only by changing the paper cover or label. However, changing the shape up to the front cover requires a large cost for the mold and is difficult to realize.

SUMMARY OF THE INVENTION In view of the above problems, it is a first object of the present invention to propose a film unit with a lens which can largely change its appearance without requiring an expensive die such as a front cover.

Further, when a decorative member is attached around the taking lens, if the decorative member is injected with a side gate when the resin is molded, a cut gate mark remains and a hole for the taking lens is provided on the side opposite to the gate. A weld line is generated.

In view of the above problems, it is a second object of the present invention to propose a method of molding a decorative member of a film unit with a lens which does not cause gate marks or weld lines.

As described above, when a film unit with a lens of a panoramic size or a film unit with a lens of a high-definition size is sold by changing only the image frame and the frame of the viewfinder, these can be identified by the appearance. There is a need to. However, it was difficult to identify them simply by changing the paper cover or label, and sometimes they were sold by mistake.

In view of such a problem, a third object of the present invention is to propose a film unit with a lens that can easily identify a difference in screen size.

[0011]

A first object of the present invention is to provide a lens-fitted film unit having at least a front portion covered with a front cover, wherein a portion of the front cover around the taking lens is a decorative member for decoration. The problem is solved by a film unit with a coated lens.

A second object of the present invention is to provide a method of manufacturing an exterior member of a film unit with a lens which covers at least a part of the front surface of the film unit with a lens, wherein the exterior member is opened for a light beam incident on a photographic lens. The problem is solved by molding the through-hole portion as a film gate, and then punching out the film gate to form a through-hole.

[0013] The third problem is that the shape of the picture frame is different.
In the method of identifying a film unit with a lens, which identifies a plurality of film units with a lens having the same appearance and shape, the front surface of the film unit with a lens has a through hole opened for a light beam incident on a photographing lens. The problem is solved by a method of identifying a lens-fitted film unit in which the color of a decorative member to be decorated is changed according to the shape of an image frame.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a film unit with a lens according to the present invention will be described in detail with reference to FIGS.

FIG. 1 is a perspective view of a film unit with a lens before a decorative member is mounted, FIG. 2 is a front view of the film unit with a lens on which a decorative member is mounted, and FIG. 3 is an enlarged cross section taken along line AA in FIG. FIG. 4 is BB in FIG.
It is an enlarged view of a section. FIG. 5 is a perspective view of the decorative member before gate cutting.

In FIG. 1, a decorative member 11 for decoration includes
It is mounted on the unit body 1 covered by the front cover 12 and the rear cover 13. In the front cover 12, a through-hole 12a is formed for a light beam incident on the photographing lens L, but a through-hole 11a larger than the through-hole 12a is formed in the decorative member 11. The front cover 12 is provided with a circular projection 12b, which is fitted in the through hole 11a.

By adopting such a configuration, even if the decorative member 11 is made glossy or colored so as to be easily reflected, if only the periphery of the through hole 12a is made dull,
There is no effect on the photographing optical system.

Above the projection 12b of the front cover 12, a rectangular through hole 12c for a light beam incident on the finder is provided.
Are formed, and the periphery of the through hole 12c is surrounded by a frame 12d. The frame 12d is fitted in a rectangular through hole 11b formed in the decorative member 11.

By adopting such a configuration, even if the decorative member 11 is made glossy or colored so as to be easily reflected, if only the periphery of the through hole 12c is made dull,
It does not affect the viewfinder optical system.

In order to attach the decorative member 11 to the front cover 12, a plurality of engaging claws 11c provided on the decorative member 11 are respectively engaged with a plurality of engaging holes 12e provided on the front cover 12 correspondingly.
Mooring.

As described above, the decorative member 11 is attached to the front cover 12.
Therefore, it is easy to replace the decorative member, and the decorative member can be replaced with a decorative member having a different design or a decorative member having a different color as described later.

An edge of the decorative member 11 excluding the lower portion is provided with a frame 11d projecting rearward. In particular, the frame 11e provided above is in contact with the upper surface 12f of the front cover 12 to be covered. . A hole 12j is provided at a step between the upper surface 12f and the rear uncovered upper surface 12g.
The front end 11f of the frame 11e is inserted into the frame 11e.

Although this state is clearer in FIG. 3, it is possible to prevent the frame portion 11e from floating above the upper portion where it is difficult to provide the engaging claws.

The left and right frame portions 11d of the decorative member 11
Has a front end that contacts the front cover 12, but the contact surface 12k is formed lower than the uncovered front portion 12m, and a step formed by the contact surface 12k and the front portion 12m has a frame 11d. Since the tips are in contact, even if the frame 11d is slightly lifted up and attached, it does not stand out. Further, no dust or dust enters through the gap.

As described above, the decorative member 11 allows the front cover 12
Therefore, even if a hole is formed in the front surface for positioning and providing an engaging claw on the front cover 12, the front cover 12 is covered with the decorative member 11 so that it is not unsightly.

The material of the decorative member 11 is not particularly limited, but if the same material as that of the front cover 12 is used, the decorative member 11 does not have to be removed from the front cover 12 when recycling. As the material, for example, PS
(Polystyrene) is preferred.

If there is a risk of light leakage from the hole formed in the front cover 12, it is necessary to shield the light with the decorative member 11. In this case, the decorative member 11 is made of metal powder such as aluminum. It is desirable to use a resin mixed with. The mixing ratio of the metal powder is preferably 3% by weight or more. In addition,
When metal powder is mixed, welds are likely to occur during molding due to disturbance of resin flow due to the size and shape of the particles and uneven temperature. For this purpose, it is desirable to use small and round particles, and it is also desirable to provide a pattern such as a grain on the external part.

When the decorative member is formed of metal, the light-shielding property is further improved and the thickness can be reduced.

Alternatively, the decorative member 11 may be molded of a transparent resin, and the objective lens may be integrally formed instead of the through hole 11b. This eliminates the need for an internal objective lens. In this case, it is desirable that the portions other than the objective lens are processed to be grained or roughened to be translucent.

Further, during resin molding, the molded part is projected from the mold by an ejector pin. However, if it is translucent, the trace of the ejector pin is seen through from the front, and it is unsightly if the arrangement is irregular. Therefore, it is preferable from the appearance that the ejector pins have the same thickness and are arranged at symmetrical positions.

In addition, characters, symbols, figures,
Or, when a pattern is applied, a unique design is obtained when applied to the back surface.

Further, as a gate in the molding process of the decorative member 11, a film gate structure as shown in FIG. 5 is desirable. That is, the portion of the through hole 11a may be made into a thin film 11g and injected from the gate 11h. Then, after molding, a thin film 11g is punched out by press working to form a through hole 11a.
To form The thin film 11g has a thickness of 0.3 mm to 0.5 m.
m is preferred. By using such a film gate, the design can be performed without concern for the position of the gate, and the gate mark is not unsightly.

The above description is about the decorative member 11 which is an exterior member.
However, the front cover 12 can be molded in the same manner.

Also, only the frame for forming the photographing screen on the film and the field frame for determining the field of view of the finder are changed, and the external shape is not changed at all. May be manufactured and sold.

In such a case, if the color of the decorative member 11 is changed according to the shape of the image frame, the difference between the image frames can be identified at a glance.

[0036]

According to the film unit with a lens according to the first aspect of the present invention, when a decorative member is changed, the appearance of the film unit is greatly changed, and when the film unit with a lens having a slightly different function is sold, It is particularly effective when used as an OEM product.

According to the film unit with the lens of the second aspect, even if the decorative member has a glossy appearance, it does not affect the photographing optical system.

According to the film unit with the lens of the third aspect, even if the decorative member has a glossy appearance, it does not affect the finder optical system and the finder portion can have a different appearance. Appearance can be changed.

According to the film unit with the lens according to the fourth aspect, the decorative member can be easily attached and detached by the engaging claws to change the appearance.

According to the lens-fitted film unit of the fifth aspect, even if the decorative member slightly floats, it is not noticeable, and dust and dirt hardly enter through the gap.

According to the film unit with the lens of the sixth aspect, it is possible to prevent the upper surface of the decorative member from floating.

According to the film unit with the lens of the seventh aspect, the hole formed in the front cover can be covered.

According to the film unit with the lens according to the eighth aspect, if the decorative member and the front cover are made of the same material, the decorative member and the front cover can be crushed without being disassembled and recycled.

According to the film unit with the lens of the ninth aspect, the light shielding property of the decorative member is improved, and it is particularly effective when there is a risk of light leakage from a hole formed in the front cover.

According to the film unit with the lens of the tenth aspect, the light shielding property of the decorative member is ensured, and the decorative member can be formed thinner than the case of resin.

According to the film unit with the lens of the eleventh aspect, a dedicated objective lens is not required.

According to the film unit with the lens of the twelfth aspect, even if the ejector pins can be seen through, there is no unsightly feeling.

According to the film unit with the lens of the thirteenth aspect, a decorative member having a unique design can be obtained.

According to the method for molding a film unit with a lens according to the fourteenth aspect, the problem of unsightly gate cut marks is eliminated by the film gate, and no weld line is generated.

According to the method for identifying a film unit with a lens according to the fifteenth aspect, it is possible to easily identify a film unit with a lens which differs only in an image frame due to a difference in color of a decorative member.

[Brief description of the drawings]

FIG. 1 is a perspective view of a film unit with a lens before a decorative member is mounted.

FIG. 2 is a front view of a film unit with a lens to which a decorative member is attached.

FIG. 3 is an enlarged view of an AA cross section in FIG. 2;

FIG. 4 is an enlarged view of a BB section in FIG. 2;

FIG. 5 is a perspective view of a decorative member before gate cutting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Decorative member 11a, 11b Through-hole 11c Engagement nail 11d, 11e Frame part 11g Thin film 11h Gate 12 Front cover L Photographing lens

Continued on the front page (72) Inventor Kiyohide Ito 1 Konica Corporation, Sakuracho, Hino-shi, Tokyo

Claims (15)

[Claims] 1. A lens-equipped film unit having at least a front part covered with a front cover, wherein a part of the front cover around the taking lens is covered with a decorative member for decoration. . 2. The lens-fitted film unit according to claim 1, wherein the decorative member has a through hole larger than a through hole formed in the front cover for a light beam incident on a photographic lens. 3. The film unit with a lens according to claim 1, wherein the decorative member has a through hole for a light beam incident on a finder. 4. The lens according to claim 1, wherein an engaging claw provided on the decorative member is engaged with an engaging hole provided on the front cover. With film unit. 5. A rearwardly projecting frame portion is provided at a predetermined edge portion of the decorative member, and a front portion of the front cover with which the front end of the frame portion abuts is positioned from a front portion of the front cover not covered by the decorative member. 2. The structure according to claim 1, wherein the height is lower.
The lens-equipped film unit according to any one of claims 1 to 4. 6. An inner surface of a frame portion of the decorative member abuts on an upper surface of the front cover, and a tip of the frame portion is inserted into a hole provided in a step portion formed on an upper surface not covered by the decorative member. The film unit with a lens according to any one of claims 1 to 5. 7. The lens according to claim 1, wherein a hole formed in a front cover for an internal mechanism or a mold structure is covered with the decorative member. With film unit. 8. The film unit with a lens according to claim 1, wherein the material of the decorative member is the same as the material of the front cover. 9. The lens-fitted film unit according to claim 1, wherein the decorative member is molded from a resin material mixed with metal powder. 10. The film unit with a lens according to claim 1, wherein the decorative member is formed of a metal plate. 11. The apparatus according to claim 1, wherein the decorative member is formed of a transparent resin and is integrally formed with an objective lens of a finder. The film unit with the lens described. 12. The film unit with a lens according to claim 11, wherein the decorative member is formed of a transparent or translucent resin, and an ejector pin for projecting a molded product at the time of molding is arranged at a contrast position. 13. The decoration member according to claim 11, wherein a character, a symbol, a graphic, or a pattern to be displayed on the decoration member is formed on a back surface of the decoration member, which is formed of a transparent or translucent resin. The film unit with the lens described. 14. A method of manufacturing an exterior member of a film unit with a lens, which covers at least a part of a front surface of the film unit with a lens, wherein the exterior member has a through hole portion opened for a light beam incident on a photographic lens. A method for manufacturing an exterior member of a film unit with a lens, comprising forming a film gate and then punching out the film gate to form a through hole. 15. A method for identifying a plurality of lens-equipped film units having different shapes of image frames and the same appearance, wherein the through-hole is opened for a light beam incident on the photographing lens. A method of identifying a film unit with a lens, wherein the color of a decorative member having a hole and decorating the front surface of the film unit with a lens is changed according to the shape of an image frame.