JP2001100291A - Waterproof type film unit with lens and its disassembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and safely take out an already exposed film unit with a lens from a waterproof case. SOLUTION: The film unit with a lens 3 is housed in a waterproof case 4. The case 4 is constituted by pawl-coupling a front surface part 36 and a back surface part 37 by a catch 65 and a locking groove 63. A rectangular recessed part for separation 15 is formed on the left side surface of the front surface part 36. A notch 23a is formed in the film unit with a lens 3 at a position facing the recessed part 15. The back wall and the inner wall of the recessed part 15 facing the notch 23a are made thin. A rib for reinforcing 71 is projected on the front wall. By inserting the tip of a separation tool 70 into a recessed part 15 and wrenching it, the thin part of the recessed part 15 is ruptured. The film unit 3 is passed out to the back surface part 37 side by the lever action of the tool 70, whereby the case 4 is separated. Then, the film unit 3 is safely and easily taken out.

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 waterproof lens and a disassembly method thereof.

[0002]

2. Description of the Related Art A film unit with a lens, which is sold in a state in which a photographic film is loaded in advance, is widely used because of its simple handling and low cost.
Various variations of the film unit with lens have been developed depending on the purpose of photographing and the purpose of use.
Inside, in order to enable underwater shooting, store the film unit with lens in a waterproof case with a watertight structure,
There is a film unit with a waterproof lens that enables shooting operations from outside the waterproof case.

[0003] Such a waterproof case for housing a lens-fitted film unit in a watertight manner is, for example, a watertight case in which transparent resin containers having a front portion and a rear portion are mutually connected via rubber packing or the like. . Then, when shooting of the stored film unit with lens is completed,
The film unit with the lens is taken to a development handling place or the like while being stored in the waterproof case. At the development office, the waterproof case is separated into a front part and a rear part, the film unit with the lens is taken out, and the exposed photographic film stored in the film unit with the lens is developed and printed.

In order to take out the lens-fitted film unit from the waterproof case, a rectangular thin portion having a reduced thickness is formed on one of the front and rear portions of the waterproof case. The removal of the film unit with lens from the waterproof case is performed as follows. First, the thin portion is pierced by a separation tool such as a flathead screwdriver, and the tip is inserted into a waterproof case. Next, by pushing the tip of the separation tool against the side surface of the film unit with a lens and prying the separation tool, the film unit with the lens is pushed out in the separating direction of the waterproof case. Thereby, the front part and the film unit with a lens, or the back part and the film unit with a lens can be collectively separated from the back part or the front part, respectively.

[0005]

However, in the conventional waterproof case as described above, it is necessary to pierce the thin portion using a separation tool such as a screwdriver, and pry it, or put it in a thin gap to open it. There was a risk of injury by sliding the tip of the tool.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to easily form a film unit with a photographed lens,
It is another object of the present invention to provide a film unit with a waterproof lens that can be safely taken out of a waterproof case.

[0007]

According to a first aspect of the present invention, there is provided a film unit with a waterproof lens according to the first aspect of the present invention. And a waterproof case for waterproofly storing the lens-fitted film unit by nail-connecting the two case members. A separating recess into which the tip of a separating tool for separating the waterproof case is inserted. A portion is provided on one of the case members, and a wall of the separation recess facing the other case member is formed to be thin. In addition,
It is preferable that a reinforcing portion is provided on a wall facing the thinned wall of the separating concave portion to serve as a fulcrum for leverage of the separating tool. Further, it is preferable that a tip receiving portion of a separation tool is formed in the film unit with lens at a position facing the thinned wall.

In the method for disassembling a film unit with a waterproof lens according to a fourth aspect of the present invention, after inserting the tip of the separation tool into the recess for separation, the separation tool is tilted, and the tip of the separation tool is moved by leverage. The thin wall is destroyed, and thereafter, the two case members are separated by the tilting operation of the separation tool. When separating the two case members, it is preferable that the film unit with the lens or the other case member is pushed out in the separating direction of the waterproof case by a leverage action by the tip of the separation tool in which the thin wall is broken.

[0009]

FIG. 1 is a perspective view showing the appearance of a film unit 2 with a waterproof lens according to the present invention. The waterproof lens-fitted film unit 2 includes a lens-fitted film unit 3 and a waterproof case 4 that houses the lens-fitted film unit 3. A shutter lever 5 for performing shutter release is mounted on the front surface of the waterproof case 4, and a winding dial 6 for winding up a photographed film is mounted on the upper surface. Further, on the front surface of the waterproof case 4, there is provided a front exposing portion 9 which is a transparent portion for exposing the photographing lens 7 of the lens-fitted film unit 3 and the object side finder window 8 to the outside. An upper surface exposing unit 10 is provided for exposing a counter window for displaying the number of remaining images to the outside. Further, on the left side surface of the waterproof case 4, a separating recess 15 described later in detail is formed.

As shown in FIG. 2, the lens-fitted film unit 3 used in the waterproof lens-fitted film unit 2 has a photographic lens 7 on the front surface, an object-side finder window 8,
An opening 11 for a shutter lever is formed, and an opening 12 for winding and a counter window 13 are provided on the upper surface.
On the back, the eyepiece side finder window 14 (see FIG. 3)
Is provided. A notch 23a is formed at the left end of the lens-fitted film unit 3. The notch 23a becomes an engaging portion at the tip of the separation tool when the film unit 3 with lens is taken out of the waterproof case 4 described in detail later.

As shown in FIG. 3, the lens-fitted film unit 3 has a main body base 19, an exposure unit 22, and a front cover 23 and a rear cover 24 that cover the front and back sides of the main body base 19. It is composed of In the main body base 19, a cartridge chamber 17 in which an unused photographic film cartridge 16 is loaded and a film chamber 18 are integrally formed. The exposure unit 22 is located on the main body base 19.
The camera has a photographic lens 7, a finder optical system 20, a shutter mechanism 21, a film wrapping mechanism, a film counter mechanism, and the like.

A winding knob 28 is rotatably mounted on the upper portion of the cartridge chamber 17 of the main body base 19. The winding knob 28 is engaged with the spool 27 of the cartridge body 26. An engagement hole 29 is formed on the upper surface of the winding knob 28.
9 is exposed to the outside through the opening 12 formed in the front cover 23. The winding dial 6 attached to the waterproof case 4 is engaged with the engaging hole 29, and the winding dial 6 and the winding knob 28 rotate integrally.
Note that a shutter button is provided at the position of the opening 12 in the front cover of a normal film unit with a lens. The shutter mechanism 21 of the exposure unit 22 is provided with a shutter lever opening 1 formed on the front surface of the front cover 23.
1 to the outside.

As shown in FIG.
Is attached to the film unit with lens 3 from the front side, and covers a front surface, an upper surface, a bottom surface, and both side surfaces of the film unit with lens 3, and the film unit 3 with lens so as to cover the front surface 36. It is composed of a back part 37 assembled to the front part 36 from behind, and a packing 38 for making the joint between the front part 36 and the back part 37 watertight.

As shown in FIG. 4, which is a cross-sectional view of the main part of the waterproof lens-fitted film unit 2, the front part 36 has a front part main body 39 formed of transparent plastic and a front part of the front part main body 39. And an elastomer layer 40 covered by two-color molding. The elastomer layer 40 is made of a polymer material having rubber-like elasticity, and performs waterproofing and non-slip of the waterproof case 4. Elastomer layer 4
The front surface 0 is shaped to expose the front exposed portion 9 of the front portion main body 39, and the upper surface is shaped to expose the upper surface exposed portion 10. An opening 41 (see FIG. 2) for accommodating the film unit 3 with a lens is formed on the rear side of the front part 36.

As shown in FIG. 2, a column-shaped boss 42 is provided upright on the front surface of the front portion 36 toward the front surface. The boss 42 is formed with a hole 43 penetrating into the inside of the front surface portion 36, and a small-diameter O-ring 44 is housed in a tip portion of the hole 43. This O-ring 44
Water and dust are prevented from entering the waterproof case 4 through the hole 43 of the boss 42.

The shutter lever 5 is substantially wedge-shaped, and a shaft 47 which is inserted into the hole 43 of the boss 42 and serves as a swing center of the shutter lever 5 is formed on the back side thereof. After the shaft 47 is inserted into the hole 43 of the boss 42, a release lever 48
Is attached. The release lever 48 enters the shutter lever opening 11 of the front cover 23 and engages with the shutter mechanism of the exposure unit 22 when the lens-fitted film unit 3 is accommodated in the front portion 36.

Thus, when the shutter lever 5 is swung, the shutter mechanism 21 in the lens-fitted film unit 3 operates. A torsion spring 45 is attached to the outer periphery of the boss 42. This torsion spring 45 urges the shutter lever 5 clockwise in the figure,
The shutter lever 5 is always returned to the initial position.

On the upper surface of the front portion 36, a columnar boss 5 is provided.
1 is erected upward. The boss 51 is formed with a hole 52 penetrating inside the front portion 36, and the hoisting dial 6 is rotatably attached to the hole 52. A large-diameter O-ring 53 is housed in the tip of the hole 52. The O-ring 53 prevents water, dust and the like from entering the waterproof case 4 through the hole 52.

The hoisting dial 6 is composed of a disk-shaped operating portion 55 having an outer periphery formed with finger projections and depressions, and a drive shaft 56 formed on the lower surface of the operating portion 55. The drive shaft 56 is inserted into the hole 52 of the boss 51,
Through the opening 12 formed in the front cover 23 of the film unit 3 with the lens, the engaging hole 29 of the winding knob 28 is formed.
Engages. Thus, when the winding dial 6 is rotated counterclockwise in the drawing, the winding knob 28 of the film unit 3 with lens rotates in the same direction, and the photographed film is taken into the cartridge body 26.

On the lower surface of the winding dial 6, a claw member 54 which operates in conjunction with the rotation of the winding dial 6 is provided.
Is swingably mounted. When the winding dial 6 is rotated in the film winding direction in the counterclockwise direction in the drawing, the claw member 54 operates the operating unit 5 of the winding dial 6.
A ratchet sound is generated by engaging with a tooth row formed inside the fifth tooth. When the hoist dial 6 is rotated clockwise in the figure, the hoist dial 6 meshes with the teeth in the operation unit 55, and prevents the hoist dial 6 from rotating in the reverse direction.

As shown in FIG. 4, a separation recess 15 is formed on the left side surface 39a of the front body 39. Correspondingly, an opening 40a is formed in the elastomer layer 40. The separating recess 15 is formed in a rectangular parallelepiped shape, and is provided at a position corresponding to the notch 23 a of the lens-fitted film unit 3 housed in the waterproof case 4. After the photographing is completed, the separation tool 70 is inserted from the separation recess 15 into the lens-fitted film unit 3 and taken out of the waterproof case 4.

As shown in FIG. 5, the separating recess 15 is
It is composed of a front wall 15b, a rear wall 15c, an upper wall 15d, a lower wall 15e, and a back wall 15f. The rear wall 15c and the back wall 15f located at positions facing the notch 23a are
9 is thinner than the other parts, and is easily broken by the insertion and prying operation of a separation tool 70 such as a flathead screwdriver having a tapered tip. The front wall 15b, the upper wall 15d, and the lower wall 15e have substantially the same thickness as the other parts of the front body 39.
Further, the front wall 15b is formed with a rib 71 serving as a fulcrum for leverage (leverage principle) when prying the separation tool 70, and is reinforced so that the fulcrum side is not easily broken. I have. Although the three ribs 71 are formed vertically separated from each other, the number of the ribs 71 may be appropriately increased or decreased. Instead of forming the rib 71, the thickness of the front wall 15b may be increased. Further, a ridge may be formed instead of the rib 71.

As shown in FIG. 2, the rear portion 37 is formed of a transparent plastic, and the viewfinder window 1 on the eyepiece side is provided.
4 can be observed from the outside via the back surface portion 37. A concave portion 61 is formed on the entire outer periphery of the rear portion 37 on the front side. A ridge 60 formed on the outer periphery of the opening 41 of the front portion 36 and the packing 38 are fitted into the recess 61. The width of the concave portion 61 is
Is formed to be slightly narrower than the combined thickness of the ridge 60 and the packing 38, so that the packing 38 is crushed in the recess 61 and closely adheres to the inner wall surface of the recess 61, and the gap between the front portion 36 and the back portion 37 is formed. Make sure to waterproof.

Further, on the four sides on the front side of the back part 37, two locked pieces 64 each having a locking groove 63 are provided on each of the upper and lower sides, and one on each of the left and right sides. I have. These locked pieces 64 are locked by locking claws 65 formed on the inner surface of the side surface of the front portion 36. As a result, the rear portion 37 is securely nailed to the front portion 36, and the waterproof property of the waterproof case 4 is improved.

Next, the operation of the above embodiment will be described. The film unit 2 with the waterproof lens that has been taken up to the end of the film after the photographing on the photo film has been completed.
Is given to the developing dealer in the form as it is, and a request for simultaneous printing is made. The film unit 2 with a waterproof lens which has been handed over to a developing dealer is sent to, for example, a large-scale developing laboratory.

At the developing station, first, the film unit with lens 3 is taken out of the waterproof case 4. For this removal, for example, a separation tool such as a flathead screwdriver is used. As shown in FIG.
The separation tool 70 is inserted into the separation recess 15 formed in the front part main body 39 of FIG.
To break the rear wall 15b of the separation recess 15 and push the separation tool 70 into the waterproof case 4.

Since the notch 23a of the lens-fitted film unit 3 is located at a position corresponding to the separating recess 15, when the separating tool 70 is tilted forward by the leverage action, the broken separating The front end 70a of the separation tool 70 contacts the notch 23a via the recess 15. When the tip 70a of the separation tool 70 comes into contact with the notch 23a, the separation tool 70 is further tilted toward the front of the waterproof case 4 by leverage as shown in FIG.

As a result, as shown in FIG. 7, the lens-fitted film unit 3 is pressed against the inner surface of the rear portion 37 of the waterproof case 4, and the engagement between the locking claw 65 and the locking groove 63 is released. As a result, the opening end of the front portion 36 is disengaged from the engagement groove 61 of the rear portion 37. Then, the film unit 3 with the lens, together with the rear surface 37 of the waterproof case 4,
It is detached from the front part 36 and taken out of the waterproof case 4.

As described above, the separation tool 70 is inserted from the separation recess 15 formed on the side surface of the waterproof case 4, and
By the lever action, the back part 37 of the waterproof case 4 and the lens-fitted film unit 3 are simultaneously detached from the front part 36 simply by tilting in the front direction. Therefore, the lens-equipped film unit 3 can be taken out of the waterproof case 4 very easily and without risk of injury at the tip 70a of the separation tool 70.

In the above-described embodiment, the separating recess 1 is located at a position closer to the front of the left side surface of the front portion 36 of the waterproof case 4.
5 is formed, the formation position of the separation recess 15 is not limited to this, and may be formed at an appropriate position. For example, it may be formed at an appropriate position such as a right side surface, a bottom surface, and a top surface of the front part 36. Further, it may be formed not only on the front part 36 but also on the back part 37. In the above embodiment, the separating recess 15 is formed in a rectangular parallelepiped shape. However, the separating recess 15 may have any shape as long as the tip of the separating tool can be inserted, and various shapes may be adopted.

In the above embodiment, the lens-fitted film unit 3 is pushed out of the waterproof case 4 by the tip 70a of the separating tool 70 in the separating direction, and the lens-fitted film unit is separated. The waterproof case may be disassembled by extruding the other case member in the separation direction with the tip end 70a of the separation tool 70 without using the third case. In this case, one of the case members is provided with a separating recess, and the other case member is provided with a leading end receiving portion at which the leading end of the separating tool comes into contact at a position facing the thin wall of the separating recess. The waterproof case may be separated in the left-right direction or the up-down direction instead of being separated in the front-rear direction as in the front part and the back part. Further, the reinforcing rib 71 may be omitted.

[0032]

According to the present invention, there is provided a waterproof case in which the two case members are claw-engaged to house the lens-fitted film unit in a water-tight manner. Since the separation recess into which is inserted is provided, the tip of the separation tool can be inserted into the separation recess. Therefore, there is no danger of the tip of the separation tool slipping and injuring the hand or the like. In addition, since the wall of the separation recess facing the other case member is made thin, a part of the waterproof case can be easily broken by twisting the separation tool in the direction of separation of the waterproof case. The tip of the separation tool can be easily and safely inserted into the waterproof case.

By providing a reinforcing portion on the wall facing the thinned wall of the separating recess and using it as a fulcrum of the leverage of the separating tool, it is possible to concentrate the force on the tip of the separating tool, and to reduce the thickness. Broken walls can be easily destroyed. Also, by forming the tip receiving portion of the separation tool on the film unit with the lens at the position facing the thinned wall, the separation tool is further twisted to be inclined in the separation direction, so that the film unit with the lens can be separated in the separation direction. Can be extruded. Thus, the prying force transmitted from the tip of the driver can be almost uniformly distributed to the plurality of claw coupling portions of the waterproof case via the lens-fitted film unit, and the waterproof case can be easily separated.

After the tip of the separation tool is inserted into the recess for separation, the separation tool is tilted to break the thinned wall by the tip of the separation tool by leverage, and thereafter, the tilting operation of the separation tool is performed. As a result, since the two case members are separated from each other, it is possible to easily break the wall made thin by leverage and separate the case. Further, when the two case members are separated, the waterproof case is pushed out by the lever of the lens-fitted film unit or the other case member in the separating direction of the waterproof case by the tip of the separating tool that has broken the thin wall. Separation can be performed easily and reliably.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a film unit with a waterproof lens according to the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is an exploded perspective view of a film unit with a lens stored in a waterproof case.

FIG. 4 is a sectional view when FIG. 1 is viewed from above.

FIG. 5 is an explanatory diagram showing a configuration of a separating recess.

FIG. 6 is an explanatory view showing a state where a jig is engaged with a waterproof case.

FIG. 7 is an explanatory diagram when the film unit with the lens is taken out of the waterproof case.

[Explanation of symbols]

 2 Film unit with waterproof lens 3 Film unit with lens 4 Waterproof case 5 Shutter lever 6 Wind-up dial 15 Separation recess 23 Front cover 23a Notch 36 Front part 37 Back part 70 Separation tool

Claims (5)

[Claims] 1. A waterproof type including a film unit with a lens in which a photographing mechanism is incorporated and in which a photo film is stored in advance, and a waterproof case in which two case members are nail-coupled to store the film unit with a lens in a watertight manner. In the lens-fitted film unit, a separation recess into which a tip of a separation tool for separating the waterproof case is inserted is provided on one of the case members, and a wall of the separation recess facing the other case member. A thin film unit with a waterproof lens. 2. A waterproof lens-equipped film according to claim 1, wherein a reinforcing portion is provided on a wall facing the thinned wall of the separating concave portion, and the reinforcing portion serves as a fulcrum of leverage of the separating tool. unit. 3. The film unit with a waterproof lens according to claim 1, wherein a tip receiving portion of a separation tool is formed on the film unit with a lens at a position facing the thinned wall. 4. The method for disassembling a film unit with a waterproof lens according to claim 1, wherein
After inserting the tip of the separation tool into the separation recess, the separation tool is tilted, the thinned wall is broken by the tip of the separation tool by leverage, and thereafter, by the tilting operation of the separation tool, A method for disassembling a film unit with a waterproof lens, comprising separating two case members. 5. When separating the two case members,
5. The disassembly of a film unit with a waterproof lens according to claim 4, wherein the film unit with the lens or the other case member is pushed out in the separating direction of the waterproof case by leverage by the tip of the separation tool in which the thin wall is broken. Method.