JPH0339784Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a camera lens holding mechanism used in a photographic film packaging unit (hereinafter referred to as a "lens-equipped film unit"), etc., which is provided with an exposure function for photographing in advance. It is related to.

[Prior art]

In conventional photography, it is customary to load film into a camera. However, very few people carry a camera with them all the time, and there is the inconvenience of not having a camera handy when you want to take a picture.
In that case, you can purchase a lens-equipped film unit from your local store at a low price just like you would buy regular photographic film, and after shooting, request DPE for each lens-equipped film unit as you would with conventional photographic film. Very convenient if possible.

On the other hand, the structure of the lens-fitted film unit must be as simple as possible, the number of parts must be reduced, the number of assembly steps must be reduced, and the manufacturing cost must be reduced. For this reason, the lens-equipped film unit is constructed by simply connecting the front cover and unit body from the front and back, loading a 110 film cartridge from behind the opened unit body, and attaching the photographic lens by screwing the front cover and unit body together. A lens-equipped film unit ``Utsurun Desu'' (product name) has been proposed that can be held in place when stopped.

[Problem that the invention attempts to solve]

However, with such units, the main body and front cover are fixed with screws, making assembly difficult.
Moreover, there are many parts and the manufacturing cost is high, and since the back of the unit body is an opening, a 35mm cartridge can be inserted.
When using size film, there was a drawback that it could not be used because the cartridge format was different.

The present invention was devised in view of the above circumstances, and an object of the present invention is to propose a lens-fitted film unit that has a simple structure and is easy to assemble.

[Means for solving problems]

In order to achieve the above object, the present invention incorporates an unexposed film in advance, exposes the film to light by operating a shutter means, and furthermore, the main body part and the rear cover part of the unit are In the attached lens-equipped film unit, the front cover, which has a lens opening, a viewfinder opening, and engaging parts with the main body on the left and right sides of the lens opening, is located at the front of the main body, which has a cartridge storage chamber and a film roll storage chamber. The main body, the front cover, and the lens are brought into contact with a lens holding portion provided between the engaging portion of the front cover provided on the front cover and the engaging portion and at a position corresponding to the rear of the lens opening. A cartridge that is fixed to each other and has only the end portion of the film fixed to a winding core is placed in the cartridge storage chamber of the main body, and an unexposed film pulled out from the cartridge is placed in the other film roll storage chamber. Rolls are stored in the main body, and by fixing the back cover section, which has a curved film support surface between the two storage chambers of the main body section, from the back of the main body section, the back surface of the stored film can be fixed. It is characterized in that it covers the film and also holds the film surface at the time of shooting.

[Effect]

The present invention allows the main body, front cover, and photographic lens to be fixed extremely easily by simply connecting the locking part of the front cover and the protruding part provided on the main body. By fixing a back member with an integrated film support surface curved from the back to the main body, a lens-equipped film unit suitable for single use without the ability to take out the film can be produced with a simple structure and assembly by raising the back. can do.

Therefore, the lens can be easily fixed by simply connecting the front cover and the main body through the protrusion and the cover.

[Embodiments of the Invention] Preferred embodiments of the lens-fitted film unit according to the present invention will be described in detail below with reference to the accompanying drawings.

In this embodiment, an example will be described in which a lens-fitted film unit using 135 film with a cartridge, which is currently the most popular, is used.

FIG. 1 shows the overall structure of a lens-fitted film unit according to the present invention, with reference numeral 10 representing the unit body, 12 a front cover, and 14 a back cover, which are manufactured by plastic molding. It is the main component of As will be described later, the joint surfaces of the unit main body 10 and the back cover 14, to which the front cover 12 is locked, are fixed by ultrasonic welding or the like, and the user can insert the film 16 built into the main body 10 into the unit main body 10. It is designed so that it cannot be removed from the

As shown in Fig. 2, the film unit has a rectangular parallelepiped shape after assembly, and is covered with a paper box (not shown), so that photographing operations can be performed through the shutter button hole, lens hole, etc. opened in the paper box. It's becoming like that.

First, the unit main body 10 will be described. A cartridge storage chamber 20 and a rolled film storage chamber 22 are formed on a substrate 18 at predetermined intervals, and the lower surfaces of the cartridge storage chamber 20 and the rolled film storage chamber 22 have openings 20A and 22A. is formed, and the film 16 is loaded from below into the cartridge storage chamber 20 and the rolled film storage chamber 22. In the film unit according to the present invention, the film 16
is pulled out from the cassette 24 in advance and wound into a roll, the tip of which is fixed to the core of the cassette 24, and each photographed film is sequentially stored in the cassette for each photographing operation. For this purpose, the film 16 may be stored in the cartridge 24 during the manufacturing process of the unit, loaded into the cartridge storage chamber 20, and then wound and stored in the storage chamber 22 in a rolled state. , film 1
6 is unwound from the cartridge 24 in a dark room and made into a rolled state 26, and then inserted into the storage chambers 20, 2 from the bottom surface.
You can also load it into 2.

A planar connecting portion 25 is provided between the cartridge storage chamber 20 and the rolled film storage chamber 22 of the unit body 10, and an exposure frame 27 shown in FIG. 3 is formed in this connecting portion 25. Patrone storage chamber 20, rolled film storage chamber 22, connection section 25
A rectangular frame 28 is formed around the opening 20 of the storage chambers 20 and 22.
An opening communicating with A and 22A is formed.
A winding knob 30 is pivotally supported in the upper part of the cartridge storage chamber 20, and a fork (not shown) is formed on the rotating shaft of the winding knob 30, and is adapted to engage with a spool shaft 32 of the cartridge 24. . Therefore, by rotating the winding knob 30 in the direction of the arrow in the figure, the photographed film 16 is stored from the rolled film storage chamber 22 into the cartridge 24.

Further, the unit body 10 is provided with a photographing mechanism including a photographic number display plate 34, a winding lever 36, a shutter lever 38, a shutter blade 40, and the like.

The shutter blade 40 opens and closes the photographing aperture 42 shown in FIG. 3 during the shutter release operation. A plate-shaped lens holder 44 is mounted on the front surface of the shutter blade 40.
is provided. The lens holder 44 has an opening 42
A recess 46 is formed at a position corresponding to , and a plastic photographing lens 48 is disposed in this recess 46 . As shown in FIG. 3, a flange 50 is formed on the peripheral edge of the photographing lens 48, and the flange 50 is connected to the recess 46.
It is placed on the stepped portion 5 of. In addition, the photographing lens 48 is
Since it is manufactured by molding, a gate 54 for material injection is formed, and this gate 54 is placed facing above the camera. This is because the lens part close to the gate 54 has a negative effect on image quality, so that part is placed in a part (such as the sky) where there is a high probability that the main part of the photographed image will not come, so as not to have a negative effect on the image.

The next front cover 12 will be explained. The upper plate 60 of the front cover 12 has an opening 62 for a shutter button.
is formed, and a shutter button 64 is arranged in this shutter button opening 62. When the shutter button 64 is pressed down, the shutter lever 38 of the above-mentioned photographing mechanism and the like are operated. Furthermore, a window 66 for displaying the number of shots taken is formed in the upper plate 60, and the number of shots taken on the display board 34 is displayed in this window 66. A viewfinder light-shielding tube 70 is formed on the front surface 68 of the front cover 12. Furthermore, a circular hole 72 for photographing is formed in the front surface 68, and the center of this circular hole 72 is formed to be located on the optical axis of the photographing lens 48. As shown in FIG. 3, the circular hole 7 has a stepped portion whose diameter gradually decreases concentrically toward the center of the lens, and this provides a hood effect to external light. Arc-shaped grooves 74, 74 are formed in the upper and lower parts of the peripheral edge part 73 of the circular photographing hole 72, and are cut at the left and right positions. As a result, the peripheral portion 73 has elasticity. As shown in FIG. 3, the surface of this elastic portion is slightly recessed from the front surface of the front cover 12, and when the lens is held, it is pushed out onto the lens 48 via the protrusion 73A of the peripheral portion 73. It will be on the same surface as the front cover 12. With this configuration, when putting the product into the outer box, the elastic part does not protrude, making it easy to put it in. Furthermore, rectangular small holes 76, 76 are formed on both the left and right sides of the photographing opening 72 (near the center between the lens opening and the side surface of the front cover). The rectangular small holes 76, 76 are formed at positions corresponding to locking claws 78, 78 formed on the unit body 10, and are used to connect the unit body 10 to the front cover 12. Since the central portion between the lens and the side surface is fixed at two locations, both the lens and the side surface of the front cover can be pressed substantially uniformly.

Next, the structure of the back cover 14 will be explained. Back cover 1
4 is formed into a substantially L-shape by a back plate 80 and a bottom portion 82. The back plate 80 has an opening 84 for a viewfinder.
The viewfinder opening 84 is formed at a position corresponding to the light-shielding tube 70 of the front cover 12. Further, the upper left side of the back plate 80 is a slightly forwardly recessed surface 86A, and a horizontally long opening 86 is formed in this surface, and this opening 86 is used for winding up after assembly as shown in FIG. A part of the knob 30 is exposed,
The winding knob 30 can be rotated from the outside of the back plate 80. Furthermore, a curved film support surface 88 is formed on the back plate 80 in order to reduce distortion of the projected image by the photographic lens, and the film 16 moves along this film support surface 88 when the winding knob 30 is rotated. Become. 90 is a concave part for escape that does not interfere with a sprocket (not shown);
Numerals 1 and 92 are protrusions that enter into the inner and outer sides of the cartridge storage chamber 20 and the roll storage chamber. This protrusion has the function of guiding the case back when inserted from the back. Furthermore, when the back cover 14 is assembled to the unit main body 10, the bottom part 82 of the back cover 14 is located below the base plate 18, and the bottom part 82 is located under the base plate 18, and is connected to the cartridge storage chamber 20 and the roll-shaped storage chamber 22.
It comes to cover the openings 20A and 22A formed at the bottom of the. Further, the bottom portion 82 is divided and is formed of a lid 100 having a light-shielding groove 102 having a shape similar to the shape of the cartridge 24 projected toward the bottom surface, and a bottom plate 106. The lid 100 is formed integrally with the back plate 80 and can be rotated via a hinge portion 108, and when all frame photography is completed, the lid 100 is configured to take out the cartridge from the state in which it is in close contact with the lower surface of the opening 20A of the cartridge storage chamber 20. It is now possible to open to the public. A pair of locking claws 110, 110 are formed at the tip of the lid 100, and the locking claws 110 engage the holes 12A, 1 of the front cover 12 when the lid 100 is closed.
It is designed to be locked to 2A. Furthermore, lid 10
0 has protrusions 112 and 114, between which the aforementioned light-shielding groove 102 is formed, and this light-shielding groove 10
The bottom portion 20A of the unit's cartridge storage chamber 20 is fitted into the unit 2 to shield the interior of the cartridge storage chamber 20 from light. Further, a rectangular step portion 116 is formed near the hinge shaft 108 of the lid 100, and the cartridge 24
The bottom surface of is brought into contact with this stepped portion 116.

A groove 89 is formed in the periphery of the film support surface 88, and a unit body 10 (not shown) is formed in this groove 89.
The projections fit together, and the rear portions of the cartridge storage chamber 20, roll film storage chamber 22, and exposure frame 27 are shielded from light by these projections and depressions. Therefore, the film 16 is housed in the main body 10 in a light-tight state. Thereafter, the unit main body 10 side and the back cover 14 are fixed together by pressing a horn against the side edges 14A, 14B and by ultrasonic welding or the like.

According to the lens-fitted film unit according to the present invention constructed as described above, when the front cover 12 is pushed into the unit body 10 during assembly by an automatic assembly machine, the locking claws 78, 78 engage with the holes in the front cover 12. 76, 76, the front cover 12 is stopped, and at the same time, the protrusion 73A of the peripheral edge 73 of the photographing opening 72 comes into contact with the flange 58 of the photographic lens 48. As a result, the photographing lens 48 is held under pressure by the front cover 12 and the lens holder 44 of the unit main body 10. , 74 are formed to form an elastic structure, so that when the peripheral portion 73 presses the lens 48, the lens 48 can be reliably held under pressure even if there is an assembly error or the like. Furthermore, since the elastically deformable portions are formed at the top and bottom, even if the lens is held and the peripheral edge portion 73 moves forward, it is possible to maintain the hood effect and not block the light beam in the diagonal direction.

Next, a series of operations of the lens-fitted film unit will be explained. When the release button 64 of the lens-equipped film unit is operated, the shutter blade 40 opens and closes, and the film 16 positioned in the exposure frame 27 is exposed. Then winding knob 3
0, the cartridge shaft 32 rotates and the exposed film 16 is stored in the cartridge 24. At the same time, the film storage chamber 22
From then on, the next photographic frame of the film is supplied to the exposure frame 27, the display plate 34 is rotated accordingly, the shutter is charged, and preparation for photographing is completed. Photographing is then performed by repeating this operation.

The sensitivity of the film used in this invention is
Any one of ASA100, 200, 400, 1000, 1600 etc. may be used.

[Effect of idea]

As explained above, according to the lens-fitted film unit according to the present invention, the front cover having the lens opening, the window opening and the locking part, and the back part are open, and the rolled film can be stored in this open part. The main body has a protruding portion that locks with the locking portion of the front cover, and a holding portion that holds the photographic lens behind the lens opening of the front cover and between the front cover and the front cover. Since the lens has a simple structure, the lens can be fixed between the front cover and the main body, and the back side is closed by the back cover with a curved film surface.
A pressure plate or the like for pressing the film becomes unnecessary, and the cost of the lens-fitted film unit can be reduced.
In addition, since the front cover is fixed at the left and right parts of the lens opening, each surface of the front cover is evenly pressed against the main body, which has the advantage of preventing some parts from being tightly connected or loosely connected. .

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a lens-equipped film unit according to the present invention, Fig. 2 is an assembled perspective view of the lens-equipped film unit, and Fig. 3 is a cross-sectional view showing the detailed structure of the photographic lens mounting portion of the film unit according to the present invention. It is a diagram. 10...Unit body, 12...Front cover, 14...
Camera back, 16...135 film, 40...shaft blade,
48... Photographing lens, 72... Circular hole for photographing, 74...
Arc groove.

Claims (1)

[Claims for Utility Model Registration] An unexposed film is incorporated in advance, and the film is exposed to light by operating a shutter means, and the main body and back cover of the unit are attached. In the lens-equipped film unit, a front cover having a lens opening, a viewfinder opening, and engaging parts with the main body on the left and right sides of the lens opening is provided in front of the main body having a cartridge storage chamber and a film roll storage chamber. The main body, the front cover, and the lens are fixed to each other by abutting on a lens holding portion provided between the engaging portions of the front cover and at a position corresponding to the rear of the lens opening; In the cartridge storage chamber of the main body part, a cartridge having only the end portion of the film fixed to the winding core is arranged, and in the other film roll storage chamber, an unexposed film roll pulled out from the cartridge is stored. By fixing the back cover part between the two storage chambers of the main body part, which has a curved film support surface at the corresponding part from the back of the main body part, it covers the back of the stored film and also makes it easy to use during shooting. A film unit with a lens characterized by holding the film surface.