JP3724766B2 - Film unit with waterproof lens - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof film unit with a lens in which a film unit with a lens is housed in a waterproof case.
[0002]
[Prior art]
The lens-equipped film unit that is sold with the film loaded in advance is generally widely used because it is simple and inexpensive because it can be taken out of the film as it is without taking out the film. ing. For the purpose of enabling use of such a film unit with a lens even in water, the film unit with a lens is housed in a waterproof case with a watertight structure so that a photographing operation can be performed from outside the waterproof case. "Shooting Runn Waterproof (trade name)" is commercially available from the applicant.
[0003]
[Problems to be solved by the invention]
However, in the waterproof case, since the shutter lever and the winding knob are incorporated in the case main body via O-rings on the respective rotation shafts, the number of parts is large, and it takes time and effort to incorporate the shutter button and the winding knob into the case main body. Therefore, the cost was high. In addition, the shutter lever is not pressed at the time of shutter release like the shutter button of a normal film unit with a lens, but it is a pivoting operation of the lever, which makes it uncomfortable compared to the release operation of a conventional film unit with a lens. There was also a problem that there was.
[0004]
The present invention has been made in consideration of the above-mentioned problems of the prior art, and an object of the present invention is to provide a waterproof lens-fitted film unit that is excellent in operability of a winding knob and a shutter button at low cost.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a film unit with a lens in which an unexposed photographic film is previously loaded in a unit body provided with a photographing mechanism, and a water-proof resin resin housing the lens-fitted film unit in a watertight manner. In a film unit with a waterproof lens comprising a case, a winding knob that is rotated when the film is wound is connected to the film unit with a lens from the outside of the waterproof case through an opening formed through the upper surface of the waterproof case. In this waterproof case, an elastomer is integrally provided by two-color molding along the edge of the opening.
[0006]
The waterproof type comprising a film unit with a lens in which an unexposed photographic film is loaded in advance on a unit main body having a photographing mechanism, and a resin waterproof case for watertightly storing the lens-fitted film unit. In the film unit with a lens, 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 .
[0007]
According to a third aspect of the present invention, the front surface of the waterproof case is integrally provided with a shutter button made of the elastomer and elastically deformed so as to enter the inside of the waterproof case by a pressing operation to operate the shutter of the film unit with a lens. It is. According to a fourth aspect of the present invention, the shutter button is provided on the surface of the right hand grip portion of the waterproof case .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the waterproof lens-fitted photo film unit 1 includes a lens-fitted photo film unit 2 and a waterproof case 21 that houses the water-tight structure. The lens-fitted photo film unit 2 includes a unit main body 3 including a main body base 4, a photographing mechanism 5 and a strobe device 6 attached to the main body base 4, and a front cover 7 and a rear cover 8 that respectively cover the main body base 4 from the front and rear. And an unexposed photographic film cartridge 9.
[0009]
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 is formed that protrudes forward along the outer periphery of the cartridge storage chamber 13 in which the photographic film cartridge 9 is stored. Provided on the right side of the front cover 7 are a strobe light emitting unit 14 of the strobe device 6 and a strobe charging start button 15 for starting charging of the strobe circuit. A shutter button 16 is provided on the front left side of the front cover 7. Further, a photograph number display window 17 is provided on the upper surface of the front cover 7.
[0010]
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 flexible elastomer. The opaque layer 22 and the transparent layer 23 are formed of a hard plastic, and examples thereof include polyethylene, polystyrene, and poly (ethylene terephthalate). The elastomer constituting the elastomer layer 24 is a polymer substance having rubber-like elasticity, and examples thereof include rubbers, thermoplastic elastomers, elastic fibers, and elastic foams. These are molded in three colors by an insert type, a rotary type, or a movable side slide type.
[0011]
As shown in FIG. 3, the portion of the waterproof case 21 corresponding to the photographing lens 11 includes an opaque layer 22 and a transparent layer 23 formed on the outer side thereof. The opaque layer 22 that constitutes most of the waterproof case 21 is not formed only at the periphery of the optical axis of the photographic lens 11, and a transparent layer 23 is formed on the outer side thereof.
[0012]
In addition, the portion corresponding to the finder 12 of the waterproof case 21 and the portion corresponding to the number-of-photographing display window 17 are also formed with the opaque layer 22 only in the corresponding portions as in the portion corresponding to the photographing lens 11 described above. Instead, the transparent layer 23 is formed on the outside thereof.
[0013]
As shown in FIG. 4, the portion of the waterproof case 21 corresponding to the shutter button 16 includes an opaque layer 22 and an elastomer layer 24 formed on the outside thereof. The opaque layer 22 constituting most of the waterproof case 21 is not formed only in the portion corresponding to the shutter button 16, and the elastomer layer 24 is formed outside thereof. Thus, by pressing the flexible elastomer layer 24, the shutter button 16 can be operated from the outside in a watertight state.
[0014]
Similarly to the portion corresponding to the shutter button 16 described above, the opaque layer 22 is not formed on the portion corresponding to the strobe charging start button 15 of the waterproof case 21, and the elastomer layer 24 is formed on the outside thereof. Is formed. Accordingly, by pressing the flexible elastomer layer 24, the strobe charging start button 15 can be operated from the outside in a watertight state, and the strobe device 14 can be charged.
[0015]
As shown in FIG. 1, an elastomer layer 24 is formed on the opaque layer 22 in a curved portion corresponding to the grip portion 3 a on the right side of the waterproof case 21. By making the curved portion into two layers of the opaque layer 22 and the elastomer layer 24, the photographer plays a role of preventing the holding portion from slipping when the photographer holds the waterproof lens-fitted film unit.
[0016]
As shown in FIG. 1, on the upper right side of the waterproof case 21, a winding knob 26 for pivoting the photographic film 9a accommodated in the lens-fitted film unit 2 into the cartridge 9b is pivotally attached. An engagement shaft 26 a is integrally formed on the lower surface of the winding knob 26. The engaging 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. The main body knob 31 engages with the end of the spool 9c of the photographic film cartridge 9. As a result, when the winding knob 26 is rotated, the spool 9c also rotates together, and the photographic film 9a is wound up into the cartridge 9b.
[0017]
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 26 a of the winding knob 26 penetrates. The elastomer layer 24 is in close contact with the outer periphery of the engagement shaft 26a and serves as a seal that keeps the shaft-attached portion of the winding knob 26 watertight.
[0018]
The operation of the waterproof lens-equipped film unit having such a configuration will be described. In the waterproof lens-fitted photo film unit 1 according to the present invention, the waterproof case 21 is formed by three-color molding including an opaque layer 22 made of hard plastic, a transparent layer 23, and a flexible elastomer layer 24. There is no need to provide a shutter lever for operating the shutter button, and the shutter button 16 can be operated simply by pressing the flexible elastomer layer 24.
[0019]
For this reason, there is no need to incorporate the shutter lever into the waterproof case, and it becomes possible to manufacture the film unit 1 with a waterproof lens at a low cost. Further, since the shutter release operation is not a lever rotation operation like a conventional shutter lever but a general pressing operation, there is no sense of incongruity during the shutter operation. On the other hand, the strobe charge start button 15 can also be operated simply by pressing the flexible elastomer layer 24.
[0020]
Further, the 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, and the axially attached portion of the winding knob 26 is kept watertight. Thus, there is no need to install an O-ring in the shaft attachment portion.
[0021]
In the above-described embodiment, the waterproof case 21 is molded in three colors, but in addition to this, the waterproof case is formed by two-color molding, and an elastomer is pasted on the opening for operating the shutter button. You may do it.
[0022]
In the above-described embodiment, the shutter button is provided on the side of the grip portion. However, as shown in FIG. 6, for example, the shutter button 51 may be formed on a curved grip portion 52 as shown in FIG. Good. By forming the shutter button 51 on the grip portion 52 as described above, the grip portion 52 is held by the fingertip when the photographer holds the lens-fitted photo film unit 50. It is possible to prevent a mistake in photographing due to the occurrence of a mistake.
[0023]
【The invention's effect】
As described above, according to the present invention, a film unit with a lens in which an unexposed photographic film is previously loaded in a unit body having a photographing mechanism, and a resin-made film housing the lens-fitted film unit in a watertight manner. In a film unit with a waterproof lens comprising a waterproof case, a winding knob that is rotated when the film is wound is connected to the film unit with a lens from the outside of the waterproof case through an opening formed through the upper surface of the waterproof case. In addition, since the elastomer is integrally formed in the waterproof case by two-color molding along the edge of the opening, it is possible to provide a film unit with a waterproof lens that is excellent in operability of a winding knob and a shutter button at low cost. it can.
[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 of the vicinity of a photographic lens.
FIG. 4 is a cross-sectional view of the vicinity of a shutter button.
FIG. 5 is a cross-sectional view of the vicinity of a winding 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

Claims (4)

In a film unit with a waterproof lens composed of a film unit with a lens in which an unexposed photographic film is loaded in advance on a unit body equipped with a photographing mechanism, and a resin waterproof case for watertightly storing the film unit with a lens.
A winding knob that is rotated when the film is wound is connected to the film unit with a lens from the outside of the waterproof case through an opening formed through the upper surface of the waterproof case, and the waterproof case is provided along the edge of the opening. A film unit with a waterproof lens, wherein the elastomer is integrally provided by two-color molding. In a film unit with a waterproof lens composed of a film unit with a lens in which an unexposed photographic film is loaded in advance on a unit body equipped with a photographing mechanism, and a resin waterproof case for watertightly storing the film unit with a lens.
With the waterproof case, 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. Film unit. The front surface of the front Symbol waterproof case made from said elastomer, characterized in that a shutter button for operating the shutter of the film unit is elastically deformed so as to enter the interior of the waterproof case by pressing together The film unit with a waterproof lens according to claim 1 or 2 . 4. The film unit with a waterproof lens according to claim 3 , wherein the shutter button is provided on a surface of a right hand grip portion of the waterproof case.

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