JPH0138579Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a film unit with a lens.
In particular, the present invention relates to a photographic film packaging unit (hereinafter referred to as a "lens-equipped film unit") which is provided with an exposure function for photographing.

[Prior art]

In conventional photography, it is customary to load film into a camera. However, only a small number of people carry a camera with them all the time, and it is inconvenient that they do not have a camera with them when they 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 just like you would with conventional photographic film. Very convenient if possible.

In order to meet such demands, the applicant has
We provided the lens-equipped film unit ``Utsurun Desu'' (product name), which is a film with a lens attached to it. This product uses 110 film loaded in a cartridge with backing paper as the photographic film.
Therefore, when assembling this lens-equipped film unit, it is only necessary to press the exposure aperture on the cartridge side against the exposure frame formed in the unit body, thereby achieving efficient assembly. Furthermore, even when the cartridge is taken out from the unit main body prior to the developing process, the film remains in the cartridge in a light-shielded state, so there is no risk of fogging during this operation.

[Problem that the invention attempts to solve]

However, in order to be able to take high-quality photographs, if you try to construct a lens-equipped film unit with a large screen size, for example, using the most popular 135 film cartridge, the difference in cartridge structure may cause problems. It comes with a big problem. For example, when assembling a film unit with a lens, the cartridge is stored in the base of the main body that houses the photographic lens and shutter, etc., the tip of the film is hooked to the winding shaft, and the back plate is placed over the base of the main body to assemble. There are several possible methods. However, when a lens-equipped film unit is configured in this way, the entire film is pulled out of the cartridge when shooting is completed, so it is necessary to rewind the exposed film into the cartridge before processing. will be done. If the user were to rewind the film in such a product designed for convenience, the ease of use as a lens-equipped film unit would be lost and it would be difficult to distinguish it as a camera.

On the other hand, even if this lens-equipped film unit is sent to a film processing laboratory for processing, the film must be rewound at the film processing laboratory, and a special rewinding machine is required for this purpose, which is costly and time-consuming. There is a big disadvantage.

From this point of view, when storing film in the base of the unit, a method can be considered in which unexposed film is pulled out from the cartridge in advance, and exposed film is rolled into the cartridge each time a photo is taken. . According to this method, all the films are stored in the cartridge when the photographing is completed, so that the above-mentioned inconvenience can be solved and it is very effective.

On the other hand, the unit is configured to stop the film from winding one frame each time one frame is photographed. If the film is stopped after a specified number of shots have been taken, the user tends not to feed the film, and the leading end of the film may not fit completely into the cartridge. In such a film unit, when the cartridge is removed by breaking the unit, the leading end of the film remains inside the unit, and there is a risk that the exposed film wound inside the cartridge may be pulled out.

The present invention has been made in view of the above circumstances, and an object of the present invention is to propose a lens-fitted film unit in which the exposed film does not need to be taken out from the cartridge.

[Means for solving problems]

In order to achieve the above purpose, the present invention has an opening for photographing, and normally this opening is blocked, and the opening is opened only when externally operated by the user and stored inside. In a lens-equipped film unit equipped with a shielding means for exposing a subject image onto a photographic film, the unit includes a main body having a film supply chamber and a film winding chamber on both sides of the photographic opening; A rear shielding part that shields the rear opening of the main body part is combined to form a light shielding structure,
Further, the main body and the rear shielding part have a fixed structure such that the photographic film cannot be taken out unless at least a portion of the film is destroyed, and one end of the film is fixed to the core in the film supply chamber in the main body. An unexposed photographic film pulled out from a film light-shielding container stored in the film is stored in a roll, and the film winding chamber is loaded with the film light-shielding container from which the film has been pulled out, and the film winding chamber is loaded with the film light-shielding container. The core is connected to a film winding means, and each time the shielding means is operated, the core is rotated to wind the exposed photographic film into the light-shielding container. A sprocket disposed in a film transport path that follows the movement of the film; a winding means that activates winding of the film when the sprocket rotates by a predetermined amount; a counter that is incremented by one frame; The present invention is characterized in that it is provided with a winding prevention means for disabling the film winding means when the counter indicates completion of photographing a predetermined number of films.

(Function) In the present invention, one end of the film is fixed to a film core in a light-tight film container placed in a winding section, and the other end is rolled and placed in a film supply section for photographing. Each time the film core is rotated, the film core is wound into the light-tight film container.

Further, a sprocket that follows the movement of the film is disposed in the film transport path, and when the sprocket rotates by a predetermined amount of rotation, a winding means is provided to enable the winding of the film to be stopped, and the detection means detects one frame. A counter stepping mechanism is provided to advance the minute.
A means is provided to disable winding of the film when a predetermined number of images have been taken.

Accordingly, in the present invention, since the leading end of the film is easily wound into the cartridge, there is no need to pull out the film from the cartridge when taking out the exposed film.

[Example of idea]

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 front cover 12 and the back cover 14 are connected to the unit body 10 from the front and back, and then fixed by ultrasonic welding or the like, and the user removes the film 16 built into the body 10 from the unit body 16. It has become impossible to do this, and when a photograph is taken, it is used in such a way that the photograph must be developed at a film processing shop.

Upon receiving this request, the film developing laboratory breaks down the film unit, takes out the film rolled up in the cartridge, and develops it as usual.

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 openings 20A and 22A are formed on the lower surfaces of the cartridge storage chamber 20 and the rolled film storage chamber 22. 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 drawn out from the cartridge 24 in advance, and the photographed films are sequentially stored in the cartridge. For this reason, the film 16 is loaded into the cartridge storage chamber 20 while being stored in the cartridge 24, and then wound up and stored in the storage chamber 22 in a rolled state. Alternatively, the film 16 may be unwound from the cartridge 24 in a dark room, made into a roll state 26, and then loaded into the storage chambers 20, 22 from the bottom.

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 (not shown) is formed in this connecting portion 25. Patrone storage room 20,
A rectangular frame 28 is formed around the rolled film storage chamber 22 and the connecting portion 25.
The lower surface of the storage compartment 2 is used to load the film 16.
Openings communicating with the openings 20A and 22A of Nos. 0 and 22 are formed. A winding knob 30 is pivotally supported on the upper part of the cartridge storage chamber 20.
A fork (not shown) is formed on the rotation axis of 0,
It is designed to engage with the 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 transferred from the rolled film storage chamber 22 to the cartridge 24.
It will be stored inside.

Furthermore, the unit body 10 has a shooting number display board 3.
4, locking lever 36, shutter drive lever 38,
A photographing mechanism consisting of a shutter blade 40, a driven sprocket 108, etc. is provided. FIG. 3 shows the detailed structure of this photographing mechanism. The shutter button 64 shown in FIG.
is formed extending backwards.

On the other hand, a locking lever 36 is rotatably supported on the main body 10 around a shaft 104, and a spring 106
It is urged to rotate clockwise by. That is, a bent piece 36A is formed on the locking lever 36A, and one end 106A of the spring 106 is locked to this bent piece 36A, thereby urging the locking lever 36 to rotate clockwise around the shaft 104. has been done. The lower end of the bent piece 36A of the locking lever 36 is in contact with the rod 102 of the shutter button 64. Therefore, when the shutter button 64 is pressed down, the shutter button 64 rotates about the shaft 100, and the locking lever 36 is rotated counterclockwise by the rod 102 against the biasing force of the spring 106.

Further, the locking lever 36 is formed with a winding stopping pawl 36B, which fits into the outer circumference 30A of the winding knob 30 and makes the winding knob 30 unrotatable after the film is wound. .

Perflation 16A for film 16,
16A,... are formed, and perflation 16
A, 16A, . . . have 8 holes, which correspond to one frame of film. This perflation 1
6A, 16A, . . . are engaged with a driven sprocket 108. The driven sprocket 108 is designed to feed one frame of film in one rotation, and therefore has eight teeth. A cam 110 is provided coaxially with this driven sprocket 108, and the pawl 36C of the locking lever 36 comes into contact with this cam 110. That is, when the film 16 is wound as shown by the arrow, the driven sprocket 108 rotates counterclockwise as shown in the figure, and therefore the cam 110 also rotates counterclockwise. When the cam 110 rotates counterclockwise, it gradually presses and rotates the pawl 36C of the locking lever 36 in the counterclockwise direction, thereby causing the locking lever 36 to move counterclockwise against the biasing force of the spring 106. It will be rotated.

The unit body 10 has a shutter drive lever 38.
is rotatably supported around a shaft 112 and urged to rotate counterclockwise by a spring 106. That is, the other end 106B of the spring 106 is brought into contact with the spring receiver 38A of the shutter drive lever 38,
As a result, the shutter drive lever 38 is urged to rotate counterclockwise. Shutter drive lever 38
is the protrusion 36 of the locking lever 36 as shown in FIG.
D and is therefore held in the position shown in FIG. 3 against the counterclockwise biasing force of spring 106. The shutter drive lever 38 has an L-shaped bent piece 38.
B is formed, and the tip of this bent piece 38B is the first
As shown in the figure, it faces the shutter blade 40.
Therefore, when the protrusion 36D of the locking lever 36 is disengaged from the shutter drive lever 38, the shutter drive lever 38 is rotated counterclockwise by the biasing force of the spring 106 to open and close the shutter blade 40. That is, the shutter blade 40 is rotatably supported around a shaft 40A, and is biased to rotate counterclockwise by a spring 40B so as to come into contact with a stopper (not shown). In this state, when the shutter drive lever 38 is rotated by the biasing force of the spring 106 as described above, the claw 40C of the shutter blade 40
8B, the shutter blade 40 is thereby opened, and photographing exposure is accomplished. The bent piece 38B of the shutter drive lever 38 is connected to the shutter blade 4.
When the shutter blade 40 rides on the claw 40C of 0, the shutter blade 40 is pulled back by the spring 40B, and the photographic opening 4
Close 2. A shutter charging cam 114 is provided coaxially with the driven sprocket 108, and after the shutter drive lever 38 opens and closes the shutter blade 40, its pawl 38 engages the notch 11 of the cam 114.
Insert into 4A. Since the cam 114 is provided coaxially with the driven sprocket 108, the film 1
6 is wound, it rotates and the shutter drive lever 3
Return 8 to its original position.

Furthermore, a one-tooth gear 116 is provided coaxially with the driven sprocket 108, and this one-tooth gear 116 meshes with a gear 34A formed on the outer periphery of the photographic number display plate 34. Therefore, the driven sprocket 108
When the camera rotates once, the single-tooth gear 116 also rotates once, and the display plate 34 is advanced by one shot to display the number of shots.

A cam 34B is formed on the back surface of the display board 34 on the rotation axis of the display board 34, and the cam 34B is activated by the rising piece 36E of the locking lever 36 after shooting a specified number of images.
The locking lever 36 is rotated counterclockwise against the biasing force of the spring 106. As a result, the claw 36C of the locking lever 36 engages the notch 11 of the cam 110.
0A, so the driven sprocket 108 becomes free. When the winding knob 30 is rotated in this state, all exposed films are stored in the cartridge. Therefore, after the specified number of shots have been taken,
Since the winding is not stopped, the user can smoothly wind the remaining film. In a developing laboratory, when a film unit is broken, all the film is stored in the cartridge, so it is easy to take out the film, and there is no problem of taking out the cartridge and pulling it out again with the leading edge of the film remaining in the unit. disappears.

Furthermore, as shown in FIG. 4, the display board 34 is formed with a display portion T (for example, 3 images) showing the number of aerial shots for testing in addition to the prescribed number of shots, eg, 24 shots. These three aerial shots can be taken at the leader part of the film 16, and therefore, with the film unit of the present invention, even after the film is loaded, aerial shots can be taken for inspecting the shutter mechanism and film advance mechanism. It can be done.

The lens holder 4 is provided with a plate-shaped lens holder 44 shown in FIG. 1 on the front surface of the shutter blade 40.
4 has a recess 4 at a position corresponding to the photographing aperture 42.
6 is formed, and a plastic photographing lens 48 is placed in this recess 46.

Next, the 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 opening 62. When the shutter button 64 is pressed down, the shutter drive 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 this circular hole 72 is used for the photographing lens 4.
It is formed so as to be located on the optical axis of No. 8. There are rectangular small holes 76 on both the left and right sides of the circular photographing hole 72,
76 is formed. This rectangular small hole 76,
Reference numeral 76 indicates a locking pawl 7 formed on the unit body 10.
8 and 78. It is used for temporary fixing when connecting the unit main body 10 to the front cover 12.

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 plate 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, a horizontally long opening 86 is formed in the back plate 80, and a part of the winding knob 30 is exposed after assembly as shown in FIG. It is designed so that it can be rotated. Further, the back plate 80 has a curved film support surface 8.
8 is formed, and when the winding knob 80 is rotated, the film 16 moves along this film support plate 88. In addition, the back cover 1 is mounted on the bottom plate 82 of the back cover 14.
4 is assembled to the unit main body 10, it is located under the base plate 18 and covers the openings formed in the lower parts of the cartridge storage chamber 20 and the roll-shaped storage chamber 22. After the film 16 is stored between the cartridge storage chamber 20 and the roll storage chamber 22 of the unit main body 10, when the back cover 14 is pushed in, the film 16 is stored in the main body 10 in a light-tight state. The bottom part 82 corresponding to the lower part of the patrone storage chamber 20 is
It has hooks 82A, 82A and a dividing plate 82B as shown in FIG. Hook 82A, 82A
is locked to the front cover 12, and when photography is finished, the hooks 82A, 82A are broken to open the bottom plate containing the cartridge. Thereafter, side edges 14A and 14B of the unit body 10 and the back cover 14, as well as the front cover 12 and the back cover 14, are fixed together by ultrasonic welding or the like.

According to the lens-equipped film unit of the present invention constructed as described above, aerial photography for inspection of the shutter mechanism and film advance mechanism can be performed on the display portion T of the display panel 34 shown in FIG.

Next, the operation of the photographing mechanism of the film unit will be explained. First, when the shutter button 64 is pressed down, the rod 102 rotates the locking lever 36 counterclockwise to release the locking state from the shutter drive lever 38. . As a result, the shutter drive lever 38 is rotated counterclockwise by the spring 106, opening and closing the shutter blade 40, and photographing and exposing the film 16 located in the exposure frame. In this state, the pawl 36B of the locking lever 36 is separated from the winding knob 30, so the winding knob 30 becomes free. When the winding knob 30 is rotated, the cartridge shaft 32 is rotated and the exposed film 16 is rotated.
is stored in the cartridge 24. film 16
When the gear is fed, the driven sprocket 108 rotates as described above, and the cams 110, 114 and the one-tooth gear 116 rotate. As the cam 114 rotates, the shutter drive lever 38 is first returned to its original position, and then the locking lever 36 is moved back to the cam 110.
The locking lever 38 returns to its original position by being rotated by the locking lever 38, and the shutter drive lever 38 is locked by the locking lever 38. At this time, the counter 34 is incremented by one shot and displays the number of shots. This results in a shutter charge operation.

When the prescribed number of shots is completed, the cam 34B of the display board 34 comes into contact with the rising piece 36E of the locking lever 36, and the claw 36C is removed from the notch 110A of the cam 110, thereby releasing the winding stop. As a result, the photographed film is stored in the cartridge 24 without being wound.

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, the lens-fitted film unit according to the present invention has a means for disabling the winding of the film after a predetermined number of shots have been taken, so that the exposed film can be easily transferred to the cartridge. stored inside. Therefore, after the specified number of shots have been taken, the winding is not stopped, making it easier for the user to wind all of the film into the cartridge, and when the user breaks the film and takes it out for development, there is no chance that some film that has not fully fit into the cartridge will remain in the unit. This has an extremely large practical effect of eliminating the trouble caused by taking it out as it is.

[Brief explanation of the drawing]

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 perspective view showing the detailed structure of the photographing mechanism of the film unit according to the present invention.
FIG. 4 is an explanatory diagram of the number of photographed images display board. 10...Unit body, 12...Front cover, 1
4... Back cover, 16... 135 film, 34... Display plate, 40... Shutter blade, 108... Sprocket.

Claims (1)

[Claims for Utility Model Registration] A photographic film which has an opening for photographing, which is normally blocked, and which is opened only when externally operated by the user and is stored inside the photographic film. In a lens-equipped film unit equipped with a shielding means for exposing a subject image to light, the unit includes a main body having a film supply chamber and a film winding chamber on both sides of the photographing aperture, and a rear opening of the main body. A light shielding structure is formed by combining the main body part and a rear shielding part for shielding the main body part, and the main body part and the rear shielding part have a fixed structure such that the photographic film cannot be taken out unless at least a part of the main body part is destroyed. The film supply chamber stores a roll of unexposed photographic film pulled out from a film light-shielding container in which one end of the film is fixed to a core, and the film winding chamber stores a roll of unexposed photographic film. The pulled-out film light-shielding container is loaded, and the winding core of the light-shielding container is connected to a film winding means, and each time the shielding means is operated, the winding core is rotated to roll out the exposed photographic film. The film is wound into a light-shielding container, and when the sprocket is rotated by a predetermined amount, the film is stopped by a sprocket that follows the movement of the film and is arranged in the film transport path. The film is characterized by comprising a winding stop means, a counter that is incremented by one frame, and a wind stopper means that disables the film winding means when the counter indicates a predetermined number of films. Film unit with lens.