JPH11174561A - Waterproofed film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproofed film unit with a lens excellent in the operability of a winding knob and a shutter button at low cost. SOLUTION: A waterproof case 21 is constituted by three-color molding of an opaque layer 22 consisting of opaque rigid plastic, a transparent layer 23 consisting of transparent rigid plastic and an elastomer layer 24 consisting of flexible elastomer. The elastomer constituting the layer 24 is high polymer having elasticity like rubber. They are three-color molded by an inserting system, a rotating system or a movable side sliding system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof lens-equipped film unit in which a lens-equipped film unit is housed in a waterproof case.

[0002]

2. Description of the Related Art A lens-equipped film unit which is sold in a state in which a film is loaded in advance is simple and inexpensive in that the film can be taken out to a developing dealer without taking out the film after photographing. , Is widely used in general. In order to make such a film unit with a lens available underwater, the film unit with a lens is housed in a waterproof case with a watertight structure, and the filming unit with a waterproof lens allows shooting operations from outside the waterproof case. "Sharun is waterproof (product name)" is commercially available from the applicant.

[0003]

However, in the above-mentioned waterproof case, since the shutter lever and the winding knob are incorporated in the case main body via the O-ring on each rotation shaft, the number of parts is large, and the shutter button and the winding button are wound. Since it took time to incorporate the knob into the case body, the cost was high. Also, the shutter lever is not a pressing operation at the time of shutter release, but a rotating operation of the lever, like a shutter button of a normal lens-equipped film unit. There was also a problem that there is.

The present invention has been made in consideration of the above-mentioned problems of the prior art, and has as its object to provide a film unit with a waterproof lens having low cost and excellent operability of a winding knob and a shutter button.

[0005]

In order to achieve the above object, according to the present invention, there is provided a film unit with a lens in which an unexposed photographic film is previously mounted in a unit body having a photographing mechanism, and a film unit with the lens. A waterproof case made of a resin, which is made of a waterproof case made of resin, which stores the waterproof case in a watertight manner. And a lens-fitted film unit, and an elastomer is integrally provided in the waterproof case along the edge of the opening by two-color molding.

According to a second aspect of the present invention, a unit body provided with a photographing mechanism includes a film unit with a lens in which an unexposed photographic film is loaded in advance, and a waterproof case made of resin for housing the film unit with a lens in a watertight manner. The waterproof lens-equipped film unit is provided with a shutter button integrally provided on the front surface of the waterproof case, the shutter button being elastically deformed so as to enter the inside of the waterproof case by a pressing operation to operate the shutter of the lens-equipped film unit. . According to a third aspect of the present invention, the shutter button is provided on a surface of a right hand grip portion of the waterproof case.

According to a fourth aspect of the present invention, a unit body provided with a photographing mechanism includes a lens-fitted film unit in which an unexposed photographic film is loaded in advance, and a resin-made waterproof case for housing the lens-fitted film unit in a watertight manner. Wherein the waterproof case is formed by three-color molding of an opaque layer made of an opaque hard plastic, a transparent layer made of a transparent hard plastic, and an elastomer layer made of a flexible elastomer. is there.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the waterproof lens-fitted film unit 1 is composed of a lens-fitted film unit 2 and a waterproof case 21 for accommodating the lens-fitted film unit 2 in a watertight structure. The film unit 2 with a lens
A unit main body 3 including a main body base 4, a photographing mechanism 5 and a strobe device 6 attached thereto, a front cover 7 and a rear cover 8 respectively covering the main body base 4 from front and rear, and an unexposed light stored in the main body base 4 And a photographic film cartridge 9.

A photographing lens 11 is exposed at the center of the front cover 7, and a finder 12 is provided above.
On the left side of the front surface of the unit body 3, a grip portion 3a protruding forward is formed along the outer periphery of the cartridge storage chamber 13 for storing the photo film cartridge 9.
On the right side of the front cover 7, a strobe light emitting section 14 of the strobe device 6 and a strobe charge start button 15 for starting charging of the strobe circuit are provided. A shutter button 16 is provided on the front left side of the front cover 7.
Further, on the upper surface of the front cover 7, a photograph number display window 17 is provided.

The waterproof case 21 is formed by three-color molding of an opaque layer 22 made of an opaque hard plastic, a transparent layer 23 made of a transparent hard plastic, and an elastomer layer 24 made of a soft elastomer. The opaque layer 22 and the transparent layer 23 are formed of a hard plastic, and examples thereof include polyethylene, polystyrene, and polyethylene terephthalate. Elastomer layer 24
Is a polymer material having rubber-like elasticity, for example, rubbers, thermoplastic elastomers,
Elastic fibers, elastic foams and the like can be mentioned. These are molded in three colors by an insert type, a rotary type, or a movable slide type.

As shown in FIG. 3, a portion of the waterproof case 21 corresponding to the photographing lens 11 includes an opaque layer 22 and a transparent layer 23 formed outside the opaque layer 22. Waterproof case 21
The opaque layer 22, which forms the majority of the above, is not formed only on the periphery of the optical axis of the taking lens 11, and the transparent layer 23 is formed outside the opaque layer 22.

The portion of the waterproof case 21 corresponding to the finder 12 and the portion corresponding to the number-of-photographs display window 17 are also similar to the portion corresponding to the above-described photographic lens 11.
The opaque layer 22 is not formed only in each corresponding portion, and the transparent layer 23 is formed outside the opaque layer 22.

As shown in FIG. 4, a portion of the waterproof case 21 corresponding to the shutter button 16 includes an opaque layer 22 and an elastomer layer 24 formed outside the opaque layer 22. The opaque layer 22, which forms the major part of the waterproof case 21, is not formed only at the portion corresponding to the shutter button 16, and an elastomer layer 24 is formed outside the opaque layer 22. Thus, by pressing the flexible elastomer layer 24, the shutter button 16 can be externally operated in a watertight state.

Also, in the portion of the waterproof case 21 corresponding to the strobe charge start button 15, similarly to the portion corresponding to the shutter button 16, the opaque layer 22 is not formed only in each corresponding portion. An elastomer layer 24 is formed. Thus, by pressing the flexible elastomer layer 24, the strobe charging start button 15 can be externally operated in a watertight state to charge the strobe device 14.

As shown in FIG. 1, an elastomer layer 24 is formed on an opaque layer 22 in a curved portion corresponding to the grip portion 3a on the right side of the waterproof case 21. By forming the curved portion into two layers, that is, the opaque layer 22 and the elastomer layer 24, when the photographer holds the waterproof lens-fitted film unit, it serves to prevent the holding portion from slipping.

As shown in FIG. 1, a wind-up knob 26 for winding up the photographic film 9a stored in the lens-fitted film unit 2 into the cartridge 9b is mounted on the upper right side of the waterproof case 21. An engagement shaft 26a is integrally formed on the lower surface of the winding knob 26. The engagement shaft 26 a enters the waterproof case 21 through a penetration hole 27 provided in the upper part of the waterproof case 21, and engages with the main body knob 31 of the unit main body 3. This body knob 31
Engage with the end of the spool 9c of the photo film cartridge 9. Thus, when the winding knob 26 is rotated, the spool 9c also rotates integrally, and the photographic film 9a is wound into the cartridge 9b.

As shown in FIG. 5, an elastomer layer 24 is formed on the opaque layer 22 on the inner surface of the penetration hole 27 through which the engagement shaft 26a of the winding knob 26 penetrates. The elastomer layer 24 is in close contact with the outer periphery of the engagement shaft 26a, and plays a role of a seal that keeps the shaft attachment portion of the winding knob 26 watertight.

The operation of the thus-constructed film unit with a waterproof lens will be described. In the film unit 1 with a waterproof lens according to the present invention, the waterproof case 21 is formed by three-color molding including an opaque layer 22, a transparent layer 23, and a flexible elastomer layer 24 made of a hard plastic. It is not necessary to provide a shutter lever for operating the shutter button, and the shutter button 16 can be operated only by pressing the flexible elastomer layer 24.

As a result, there is no need to incorporate the shutter lever into the waterproof case, and it is possible to manufacture the waterproof lens-fitted film unit 1 at low cost. Further, since the shutter release operation is not a rotation operation of a lever like a conventional shutter lever but a general pressing operation, there is no sense of incongruity at the time of the shutter operation. On the other hand, the strobe charging start button 15 can be operated only by pressing the flexible elastomer layer 24.

Further, an elastomer layer 24 is formed on the opaque layer 22 on the inner surface of the penetration hole 27 through which the engaging shaft 26a of the winding knob 26 penetrates, so that the shaft-attached portion of the winding knob 26 is kept watertight. , As in the past, O
There is no need to install a ring.

In the above-described embodiment, the waterproof case 21 is molded in three colors. Alternatively, the waterproof case may be formed by two-color molding, and an elastomer may be formed in the opening for operating the shutter button. May be pasted.

In the above-described embodiment, the shutter button is provided on the side of the grip portion. In addition, for example, as shown in FIG. 6, the shutter button 51 is formed on the curved grip portion 52. May be. By forming the shutter button 51 on the grip portion 52 in this manner, the photographer can use the film unit 50 with a lens.
When the image is held, the grip portion 52 is held by the fingertip, so that it is possible to prevent the photographing lens 53 from being caught by a finger and causing a photographing error.

[0023]

As described above, according to the present invention, a lens-equipped film unit in which an unexposed photographic film is pre-loaded on a unit body having a photographing mechanism,
In a film unit with a waterproof lens comprising a waterproof case made of a resin which houses the film unit with a lens in a water-tight manner, an opening formed through a top surface of the waterproof case through a winding knob which is turned when the film is wound up. Through a waterproof case and connected to the lens-fitted film unit from the outside of the waterproof case, and an elastomer is integrally provided on the waterproof case along the edge of the opening by two-color molding. It is possible to provide a film unit with a waterproof lens excellent in the above.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view showing a film unit with a waterproof lens.

FIG. 3 is a cross-sectional view near a photographing lens.

FIG. 4 is a sectional view near a shutter button.

FIG. 5 is a sectional view showing the vicinity of a hoisting knob.

FIG. 6 is an external perspective view showing a film unit with a waterproof lens according to another embodiment of the present invention.

[Explanation of symbols]

 2 Film unit with lens 16 Shutter button 21 Waterproof case 22 Opaque layer 23 Transparent layer 24 Elastomer layer 26 Winding knob

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI G03C 3/00 575 G03C 3/00 575C 575H

Claims (4)

[Claims] 1. A waterproof lens comprising: a lens-fitted film unit in which an unexposed photographic film is loaded in advance in a unit main body having a photographing mechanism; and a resin waterproof case for housing the lens-fitted film unit in a watertight manner. In the attached film unit, a winding knob that is rotated when the film is wound is connected to the lens-equipped film unit from the outside of the waterproof case through an opening formed through the upper surface of the waterproof case. A film unit with a waterproof lens, wherein an elastomer is provided integrally by two-color molding along an edge of the opening. 2. A waterproof lens comprising: a lens-fitted film unit in which an unexposed photographic film is loaded in advance in a unit main body having a photographing mechanism; and a resin waterproof case for housing the lens-fitted film unit in a watertight manner. The waterproof type, wherein a shutter button for elastically deforming the front of the waterproof case to enter the inside of the waterproof case by a pressing operation to operate a shutter of the lens-fitted film unit is provided integrally. Film unit with lens. 3. The film unit with a waterproof lens according to claim 2, wherein the shutter button is provided on a surface of a grip on the right hand of the waterproof case. 4. A waterproof lens comprising: a lens-fitted film unit in which an unexposed photographic film is loaded in advance in a unit body having a photographing mechanism; and a resin waterproof case for housing the lens-fitted film unit in a watertight manner. In the attached film unit, the waterproof case is formed by three-color molding of an opaque layer made of an opaque hard plastic, a transparent layer made of a transparent hard plastic, and an elastomer layer made of a flexible elastomer. Waterproof film unit with lens.