JPH11295793A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the recycling of a film unit without requiring labor and time to detach an optical member by integrally attaching the optical member exposed to the outside surface on an outer package member which is molded of a resin and with which an internal member is covered. SOLUTION: A photographing lens L is dropped into a circular recessed part from the rear of a front cover 1 and subsequently, a fixed diaphragm member 31 having a fixed diaphragm 31a is dropped thereto and holds the lens L. Then, the periphery part 31b of the member 31 is bonded with the cover 1 by ultrasonic welding. An objective lens is inserted and attached to the cover 1 from the back side and the periphery part of the objective lens abutting on the back surface of the cover 1 is ultrasonically welded to bond the objective lens with the cover 1. In the same manner, and ocular is inserted and attached to a rear cover from the back side and the periphery part of the ocular is ultrasonically welded to bond ocular with the rear cover. Thus, the lens L and the objective lens are integrally bonded with the cover 1 but the objective lens is made of the same material as the cover 1 and can be recycled without being separated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical member exposed on an outer surface of a film unit with a lens.

[0002]

2. Description of the Related Art A film unit with a lens includes a photographic lens for entering subject light, an objective lens for a finder,
Optical members such as an eyepiece of a finder that emits subject light and a strobe panel that emits strobe light are exposed on the outer surface. In consideration of the efficiency of assembly and product inspection, these optical members can be mounted directly on the unit body, which is the base of the film unit with lens, or mounted via other members. The member is provided with an opening through which predetermined light enters or exits and an opening into which the optical member is fitted. Therefore, these optical members are not attached to the exterior member even if they contact or fit with the exterior member.

[0003] On the other hand, a film maker collects a film unit with a lens from which a film has been removed in a lab to save resources. The collected film unit with a lens is disassembled and inspected. With respect to the unit, the so-called reuse of reusing the film unit with a new lens is performed. In addition, unusable parts and units are dismantled, and if it is a resin, it is pulverized into pellets, and remolding is performed, so-called recycling.

[0004]

However, since the above-mentioned optical member is exposed on the outer surface, it is easily damaged during use by the user. In addition, since the inspection of the optical member at the time of reuse is strict unlike a decorative member, it is often impossible to reuse the optical member. Therefore, recycling must be performed, and the optical member must be removed for recycling. However, since the optical member is often firmly attached to the unit main body and other members, this is a troublesome operation.

The present invention has been made in view of such a problem, and the optical members exposed on the outer surface are easily damaged and are difficult to reuse. It is an object of the invention to propose a film unit with a lens that can be recycled without requiring the trouble of removing the lens.

[0006]

The object of the present invention is to integrally mount an optical member which is formed of a resin and is exposed on an outer surface thereof and which emits or emits predetermined light to an exterior member which is formed of a resin and covers an inner member. The problem is solved by a film unit with a lens which is characterized by the following.

[0007]

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

First, the appearance of a film unit with a lens will be described with reference to an external perspective view shown in FIG.

In FIG. 1, reference numeral 1 denotes a front cover that covers internal components from the front, and 2 denotes a rear cover that covers internal components from behind. At the center of the front cover 1 is disposed a photographing lens L for entering subject light and forming an image on a film. Above the photographing lens L, a finder objective lens 3 for entering subject light is disposed. On the right side of the objective lens 3, a strobe panel 4 that covers the front of the strobe light emitting section and emits strobe light is arranged, and below the strobe panel 4, an operation member 11 for operating a strobe main switch is arranged. When the right end of the operation member 11 protrudes as shown in the figure, the main switch is turned on.

A release button 12 and an exponent window 13 are arranged above the front cover 1, a neon tube window 14 is arranged above the rear cover 2, and a winding knob 15 is arranged behind.

Although not shown in FIG. 1, an eyepiece of a finder for emitting subject light to a pupil is arranged behind the rear cover 2.

In this embodiment, a photographing lens L, an objective lens 3 and a strobe panel 4 as optical members are assembled integrally with a front cover 1 as an exterior member, and an eyepiece as an optical member is attached to an exterior member. And is integrally assembled with the rear cover 2.

FIG. 2 is a longitudinal sectional view of a photographic lens and the like. The photographing lens L is dropped into the circular concave portion from the rear of the front cover 1, and subsequently, a fixed stop member 31 having a fixed stop 31a
And hold the taking lens L. Then, the peripheral portion 31b of the fixed throttle member 31 is joined to the front cover by ultrasonic welding. The front cover 1 and the fixed throttle member 31
Is black polystyrene, and the taking lens L is transparent acrylic.

FIG. 3 is a cross-sectional view of an objective lens, an eyepiece, a strobe panel, and the like. The objective lens 3 is attached to the front cover 1 from the back side, and the peripheral portion of the objective lens 3 that is in contact with the back surface of the front cover 1 is ultrasonically welded to join the objective lens 3 to the front cover 1.

Similarly, the eyepiece 5 is inserted into the rear cover 2 from the back side, and the periphery of the eyepiece 5 abutting on the rear surface of the rear cover 2 is ultrasonically welded, thereby attaching the eyepiece 5 to the rear cover 2. Is joined to.

Reference numeral 4 denotes a strobe panel. The strobe panel 4 is inserted into the front cover 1 from the front side, and the periphery of the strobe panel 4 which is in contact with the step of the front cover 1 is ultrasonically welded. 4 is joined to the front cover 1. Reference numeral 41 denotes a discharge tube that emits strobe light, and 42 denotes a reflector that reflects the strobe light to a predetermined range, which is mounted on a unit body (not shown) serving as a base of the film unit with a lens. It is not fixed to the front cover 1 or the strobe panel 4.

The front cover 1 and the rear cover 2 are made of black polystyrene, and the objective lens 3, the strobe panel 4, and the eyepiece 5 are made of transparent polystyrene.

Therefore, although the taking lens L, the objective lens 3 and the strobe panel 4 are integrally joined to the front cover 1, they are exposed on the outer surface and may be damaged during use by the user. High and difficult to reuse. Therefore, the objective lens 3 and the strobe panel 4 are made of polystyrene of the same material as the front cover 1 and need not be separated for recycling.

When it is difficult to form the photographic lens L from polystyrene due to its optical properties, acrylic is used. Since only the photographic lens L is made of a different kind of material, it becomes an impurity of a reproduction material. There is no problem in practical use since the proportion of the whole is small.

Further, even if the taking lens L is made of polyethylene of the same material as the objective lens 3, if there is no problem in optical properties, it is a more preferable reproducing material.

Further, since the rear cover 2 and the eyepiece 5 are made of the same material of polystyrene, there is no need to separate them for recycling.

The joining direction of the optical member to the front cover 1 and the rear cover 2 may be either from the back side or the front side, and is not limited.

In the above description, the photographing lens L, the objective lens 3, the strobe panel 4, and the eyepiece 5, which are optical members, are joined to the front cover 1 and the rear cover 2, which are exterior members, by ultrasonic welding. It is not limited to.

For example, as shown in FIG.
After a plurality of forked portions 51a are provided around the periphery of the forked portion 1 and the photographing lens L is dropped on the front cover 1, the forked portion 5 is attached to a pin 1a standing on the front cover 1 with a diameter slightly larger than that of the forked portion 51a.
The fixed aperture 51 may be engaged with the front cover 1 by inserting 1a.

Further, as shown in FIG.
A plurality of projections 61a having an acute angle are provided on the outer circumference of the lens, and after the photographing lens L is dropped on the front cover 1, the plurality of projections 61a are engaged with the inner diameter 1b slightly smaller than the outer diameter of the plurality of projections 61a. Is also good.

It goes without saying that such frictional coupling is performed not only by the photographing lens L but also by the objective lens 3 and the strobe panel 4.
And the eyepiece 5, or any other coupling method such as bayonet coupling or screw coupling.

However, a fixing method using a member made of a metal or the like or a fixing method using an adhesive is not preferable because it becomes an impurity of the recycled material.

[0028]

According to the film unit with the lens according to the first to sixth aspects, the optical member exposed on the outer surface is integrally attached to the exterior member, so that the optical member is damaged during use by the user. Even if it becomes difficult to reuse after collecting the lens-equipped film unit, it can be crushed as it is without removing the optical member from the exterior member and made into pellets, and recycling is not necessary. Becomes

[Brief description of the drawings]

FIG. 1 is an external perspective view of a film unit with a lens.

FIG. 2 is a longitudinal sectional view of a photographing lens and the like.

FIG. 3 is a cross-sectional view of an objective lens, an eyepiece, a strobe panel, and the like.

FIG. 4 is a perspective view in which a fixed aperture is engaged with a front cover.

FIG. 5 is a perspective view in which a fixed aperture is engaged with a front cover.

[Explanation of symbols]

 L photographing lens 1 front cover 2 rear cover 3 objective lens 4 strobe panel 5 eyepiece 31 fixed aperture member

Claims (6)

[Claims] 1. A lens with a lens, wherein an optical member which is resin-molded and is exposed on an outer surface and which receives or emits predetermined light is integrally attached to an exterior member which is resin-molded and covers an inner member. Film unit. 2. The optical device according to claim 1, wherein the optical member is at least one of a photographing lens, an objective lens of a viewfinder, and a strobe panel that covers the front of a strobe light emitting unit, and the exterior member is a front cover. Claim 1
The film unit with a lens according to 1. 3. The lens-equipped film unit according to claim 2, wherein the objective lens, the strobe panel, and the front cover are made of the same material. 4. The film unit with a lens according to claim 2, wherein the photographing lens is mounted on the front cover together with a member having a fixed aperture. 5. The lens-fitted film unit according to claim 1, wherein the optical member is an eyepiece of a finder, and the exterior member is a rear cover. 6. The film unit with a lens according to claim 5, wherein the eyepiece and the rear cover are made of the same material.