JPH0756563B2 - Film unit with lens - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film packaging unit (hereinafter referred to as "lens film unit") which has a film containing a 35 mm cartridge and is provided with a photographing exposure function in advance. The present invention relates to a lens-fitted film unit improved so as to obtain

[0002]

2. Description of the Related Art In conventional photography, a camera is usually loaded with a film. However, the number of people who always carry a camera is small, and there is an inconvenience that it is impossible to take a picture unless the camera is at hand when the user wants to take a picture. In that case, you can purchase from a store near the lens film unit as you would buy a regular photo film, and if you can request a DPE for each lens film unit after shooting, just like a conventional photo film, it will be very convenient. It is convenient. As a film unit with a lens having such a concept, U.S. Pat. No. 2,933,027, Japanese Utility Model Publication No. 39-33924.
No. 6,708,486, the technical disclosure was made.

Since the lens-fitted photo film unit shown in these figures needs to be manufactured at low cost with a simple structure and easy assembly, the unit is constructed by adhering the main body for accommodating the photographing mechanism and the film to the back cover. The roll film supply chamber and the winding chamber have a very simple structure in which the partition of the exposure chamber located between them is connected to the main body and the lid. Then, to take out the photographed film, the lens-fitted film unit was broken or disassembled and opened.

On the other hand, in July 1986, the applicant of the present invention started to sell a film unit with a lens (trade name "Sharan" which is loaded with a 110 film cartridge). By the way, in the above-described lens-fitted film unit utilizing the 110 film cartridge or the like, the screen size of the film is small, so that it is difficult to obtain a clear print photograph when the print size is increased.

[0005]

However, in the case of a lens-fitted photo film unit, the photo film unit needs to be provided at a price that is not much different from that of buying a photo film, so that it must be manufactured at a very low cost. Therefore, there is a problem that the material and number of lenses that affect the image quality are limited. Under such restrictions, in order to improve the image quality, it is not necessary to simply use a 35 mm size film having a screen larger than 110 film, and further improvement is required. On the other hand, if the 35 mm film is loaded as it is, a dark room is required when the film is taken out at the film developing station, which makes the handling inconvenient. Therefore, in consideration of a large amount and easy development processing, it is required to be a lens-fitted film unit that is easy to handle.

The present invention has been made in view of the above background, and it is possible to obtain a high-quality photograph without increasing the cost of the lens-equipped film unit, and to easily take a photographed film in a bright room. It is an object of the present invention to provide a lens-fitted film unit that can be taken out from the main body.

[0007]

In order to achieve the above object, the first aspect of the invention set forth in the first aspect of the invention is to incorporate an unexposed film in advance, and operate the shutter means with respect to this film. Thus, in the lens-fitted film unit adapted to apply the exposure through the exposure applying mechanism, the unexposed film roll is arranged on one side of the film exposure frame in the unit and is rotatable on the opposite side of the film exposure frame. The film core of the unit is connected to the core which has a core inside and which has one end of the unexposed film fixed to the core and which is rotatably supported in the cartridge. After the shutter means is operated, the unexposed film can be wound into the cartridge, and the unexposed film roll is a manufacturing process of the unit. It is formed by being pulled out from the state of being stored in the cartridge, and a single lens made of plastic is used for the photographing lens, while the film exposure surface is the lens surface from the film side due to the curved regulation surface of the back shield part. It is a concave curved surface facing toward.

According to a second aspect of the invention set forth in claim 2, an unexposed film is built in advance, and exposure is applied through an exposure applying mechanism by operating shutter means for this film. In the lens-fitted film unit, the unexposed film roll is arranged on one side of the film exposure frame in the unit, and the rotatable core is provided on the opposite side of the film exposure frame, and the core is not exposed. A patrone having one end of the film fixed is arranged, the film winding operation means of the unit is connected to the core, and the unexposed film can be wound into the patrone after the shutter means is operated. In the manufacturing process of the unit, the unexposed film is pulled out from the state of being housed in the cartridge by a winding means separate from the unit. A winding shaft for forming a roll is provided in the unexposed film roll storage portion, one end of the winding shaft is fitted into a hole opened to the outside of the unit through a light shielding structure, and the end face is engaged with the winding means. In this case, the corresponding concavo-convex portion is formed.

[0009]

According to the first aspect of the present invention, by combining an inexpensive single-lens plastic lens and a concavely curved film exposure surface, the effect of lens distortion can be reduced while the cost is reduced, and the image quality can be improved. You can get good photos. Further, in the manufacturing process at the factory, the unexposed film is pulled out from the cartridge to form an unexposed film roll. Therefore, if the film winding operation means is operated every time one photographing is completed, the film is already photographed. The film is caught in the Patrone. As a result, in the photo lab, the film can be taken out in the bright room.

In the second aspect of the invention, a winding shaft, which is connected to the leading end of the film coming out of the cartridge, is arranged in the unexposed film roll storage part, and one end of the winding shaft is opened to the outside of the unit through the light shielding structure. It is fitted in the hole, and an uneven portion is formed on its end face. By connecting a winding means separate from the unit to the uneven portion and rotating the winding shaft, the unexposed film can be pulled out from the cartridge and stored in the unexposed film roll storage portion in a roll shape. This film withdrawal is done in the light room of the factory. Further, similarly to the first invention, since the photographed film is caught in the cartridge, it is convenient to take out the film.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 3 showing the outer appearance of a lens-fitted film unit according to a first embodiment of the present invention, a unit main body 1 has a main body base 2 made by molding of plastic and an opening on the back side of the main body base 2 which is exposed to light. It consists of a back cover 3 that closes tightly. The main body 2 has a taking lens 4, a finder window 5,
In addition to the release button 6, a photographing mechanism such as a shutter and a film winding mechanism is incorporated inside. The back cover 3 is fixed to the main body base 2 by ultrasonic welding or the like so that the user cannot remove it. More preferably, the unit body 1 is always covered with a paper box (not shown), and holes for exposing the taking lens 4 and the release button 6 are opened in this paper box so that the operation can be performed through these holes.

In FIG. 1 showing a state before the back cover 3 is attached to the main body base 2, an opening 2a extending from the back surface to the bottom surface is formed in the main body base 2, and the back cover 3 is provided so as to shield the opening 2a in a light-tight manner. The shape of is fixed. The main body base 2 is provided with an unexposed film roll chamber (hereinafter, simply referred to as a film roll chamber) 11 and a cartridge chamber 12 so as to sandwich the exposure frame 10. On the upper wall of the cartridge chamber 12, there is projected a film winding fork 14 which rotates in a counterclockwise direction in the drawing in conjunction with the operation of the winding knob 8. Further, the film supporting surface 15 on which the exposure frame 10 is formed is raised toward the back cover 3 side as shown in the drawing,
The sprocket 16 is projected on the upper part.

Inside the unit main body 1 consisting of the main body base 2 and the back cover 3, a cartridge 20 for preliminarily storing a film 21 having a width of 35 mm in a light-shielded state at the time of assembling, and a cartridge 20 pulled out from the cartridge 20. The film 21
The film roll chamber 11 and the cartridge chamber 12 are loaded respectively. The patrone 20 and the film 21 used here are the international standard (ISO: 1007-19).
The film is a 35 mm film (135 film) containing a cartridge defined in 1979 edition, and the rear end of the film 21 is fixed to a winding core 28 provided in the cartridge 20.

At the time of this loading operation, a loading jig as shown by the chain double-dashed line in the figure can be used. That is, the unexposed film 21 pulled out from the cartridge 20 is wound around the winding shaft 22 to become the film roll 23. On the other hand, the cartridge 20 is held by the grip arm 25, and the extended portion 26 between the cartridge 20 and the film roll 23 is supported by the support plate 27 so as to be curved slightly upward. Of course, these loading jigs can be configured as one loading device in which each loading jig is connected.

The patrone 20 and the film roll 23 held by the loading jig are moved in the axial direction of the patrone 20 so that the openings 11a, 1 are opened.
It is loaded into a predetermined position of the main body base 2 through 2a. As a result, the winding core 28 (see FIG. 2) rotatably provided on the cartridge 20 and having one end of the film 21 engaged is engaged with the fork 14. Further, since the spread portion 26 of the film is lifted up by the support plate 27, the upper edge of the spread portion 26 is loaded with the sprocket 1 when the film is loaded.
It does not get caught in 6.

After the film roll 23 and the cartridge 20 have been inserted into the film roll chamber 11 and the cartridge chamber 12 in this way, the grip arm 25 is released and the winding shaft 22 is moved to the slit 2, for example.
The portion 2a is bent to reduce the diameter. Thereby, each of the loading jigs can be retracted in the axial direction. As a result, the cartridge 20 is left in the cartridge chamber 12, and the film roll 23 is placed in the film roll chamber 11. At this time, the film roll 23 tries to be unwound due to its own curling habit,
Since the outermost periphery thereof is regulated by the wall surface that defines the film roll chamber 11, the film roll chamber 11 is settled down with a predetermined diameter.

Thereafter, the back cover 3 is covered so as to shield the opening 2a from the light, and is fixed to the main body base 2 by ultrasonic welding. On the inner surface of the back cover 3, a film regulating surface 30 that is curved similarly to the film supporting surface 15 on the main body base 2 side is formed. Therefore, by covering the main body base 2 with the back cover 3 by pressing the film 21 from above, and by fixing the back cover 3, the spread portion 26 of the film which is curved upward is supported by the film as shown in FIG. Face 15
Then, the film surface is positioned at a predetermined exposure position without rising or waviness of the film surface. At this time, the sprocket 16 comes into mesh with the perforation. Of course, an opening for receiving the protruding portion of the sprocket 16 is provided in a part of the film regulation surface 30.

A step 32 is formed on one bottom of the back cover 3, that is, the bottom of the film roll chamber 11, and the film roll chamber 11 side is closer to the cartridge chamber 12.
The bottom is higher than. This is because it is necessary to support the lower edge of the film roll 23 itself in the film roll chamber 11, and the step 32 keeps the posture of the film 21 horizontal. When a single lens formed by plastic molding or the like is used as the photographing lens 4 in order to reduce the cost of the unit body 1, the influence of distortion is reduced by curving the film surface at the exposure position as described above. This is effective in improving the focus in the peripheral area of the screen and is also advantageous in correctly positioning the film 21 at the exposure position.

The above-described film loading and back cover 3 mounting operations must be performed in a dark room, but the loading of the film is from the axial direction, and the back cover 3 is mounted from the top of the film. These operations can be easily automated by using the above-mentioned loading jig and the like, which is very effective in reducing the assembly cost.

Also, the cartridge 20 and the film roll 2
Instead of loading the 3 axially as described above, it is also possible to load them on the body base 2 as follows. That is, after loading the cartridge 20 in the cartridge chamber 12, the film 21 is wound by the winding shaft 22 outside the film roll chamber 11. Therefore, the film 21 is wound while being drawn obliquely upward (about 30 ° to 45 °) from the cartridge 20. After winding the film 21 around the winding shaft 22 in this manner, the film roll 23
Is loaded into the film roll chamber 11 together with the winding shaft 22. Then, the winding shaft 22 is bent at the slit 22a to be removed from the film roll 23, and only this winding shaft 22 is opened 11a.
It should be pulled out from. When this loading method is adopted, it is not necessary to provide the opening 12a at the bottom of the cartridge chamber 12 side.

Further, when loading is carried out as described above, the winding knob 8 integrally formed with the fork 14 is detached from the main body base 2, and the winding core 28 of the cartridge 20 is finished after the winding of the film 21 is completed. It is preferable to insert the winding knob 8 from the upper surface of the main body base portion 2 so that the fork 14 is engaged with the winding knob 8. For this purpose, an opening for inserting the winding knob 8 may be formed on the upper surface of the main body base 2.

When the release button 6 is operated, the shutter 3
5 is opened and closed, and the spread portion 26 of the film located in the exposure frame 10 is exposed. Thereafter, when the winding knob 8 is rotated, the winding core 28 is rotated via the fork 14, so that the exposed film is wound into the cartridge 20. At the same time, the next film frame is supplied from the film roll 23 to the position of the exposure frame 10, and the sprocket 16 is rotated by the supply of the film. Then, when one frame fixed length feed is detected by the rotation of the sprocket 16, the winding knob 8 is locked and the preparation for the next photographing is completed.

By repeating the photographing in this way, the exposed film is sequentially wound into the cartridge 20. Then, after the image capturing is completed, the image is sent to the photo lab as it is. When processing is done in the photo lab, the back cover 3 can be removed by using a disassembling jig or the like to take out the photographed patrone in the same state as before. After that, the film can be developed by the conventional process. , Print processing can be performed.

In order to simplify the work of taking out the cartridge 20 at the developing station, it is convenient to form a pull-top type opening for taking out the cartridge in the bottom portion of the back cover 3. That is, as shown in FIG. 1, a groove 37 is formed on the inner wall of the bottom surface of the back cover 3 on the side of the cartridge chamber, which is easily damaged, and a projection 38 is formed on the outer wall. In this case, by hooking a finger on the protrusion 38 and pulling it, an opening is formed along the groove 37, so that the patrone 20 having been photographed can be taken out from this opening. In addition, since the unit body 1 is partially damaged by this, it is possible to prevent the film unit body 1 from being reused without the accuracy guarantee of repeated use.

In the second embodiment of the present invention shown in FIG. 4, each of the cartridge 20 and the film roll 23 is held on the back cover 3 side, and then the cartridge chamber 12 and the film roll chamber provided in the main body base 2 are provided. I am trying to load it at 11. A film support plate 40 made of a leaf spring is fixed to a pedestal 39 integrally formed inside the case back 3. The central portion of the film support plate 40 is
The film is curved corresponding to the film supporting surface 15 on the main body base 2 side, and both sides thereof are further bent into a circle to form a cartridge holding portion 41 and a roll holding portion 42, respectively. The cartridge holder 41 and the roll holder 42
For, the central portions thereof are cut out as shown in the figure, and are formed to be elastic.

In the dark room, the unexposed film 21 is wound into a roll and pulled out to make a film roll 23, and then the film roll 23 and the film roll 23 are engaged with the cartridge holder 41 and the roller holder 42, respectively. To wear. Since the film roll 23 has a repulsive elastic force in the rolling and unfolding direction, the film roll 2
The outer peripheral surface of 3 is lightly pressed against the inner surface of the roll holding portion 42.
The notch 40a formed in a part of the upper edge of the film support plate 40 acts as a relief part into which the sprocket 16 enters.

After attaching the cartridge 20 and the film roll 23 to the back cover 3 in this manner, the back cover 3 is integrated with the main body base 2. At the time of this work, tilt the bottom side of the back cover 3 slightly so that the cartridge 2
0, the back cover 3 is attached to the main body base 2 along the axial direction of the film roll 23. Thereby, the core 2 of the cartridge 20
8 is engaged with the fork 14, and the film roll 23 is loaded into the film roll chamber 11. After that, an ultrasonic horn is pressed against a required portion of the back cover 3 or the main body base 2, and these are ultrasonically welded to complete the assembly. Of course, in order to integrate the main body base 2 and the back cover 3, it is possible to use an adhesive or a method of fitting and fitting.

FIG. 5 shows a cross-section of the essential part of the lens-fitted film unit assembled in this manner. Film 21 spread between patrone 20 and film roll 23
Is pressed against the film supporting surface 15 by the central portion of the film supporting plate 40, and the film 21 is pressed as in the first embodiment.
Is correctly positioned behind the exposure frame 10, and the first
A photograph can be taken by performing the same operation as in the embodiment. The outer surface of the roll holder 42 contacts the inner wall surface of the film roll chamber 11 of the main body base 2,
The inner surface of the holding portion 42 is in a state of being raised like a step from the inner wall surface. Therefore, in the film roll chamber 11 after the assembly is completed, a guide surface raised from the inner wall surface is formed so that only the upper and lower portions of the inner wall surface thereof are in contact with the outermost peripheral winding surface of the film roll 23. .

By the way, when the winding knob 8 is rotated, the film 21 is pulled out while the outermost periphery of the film roll 23 is in sliding contact with the inner surface of the roll holding portion 42, so that the friction may increase the drawing resistance of the film 21. Comes out. In the embodiment shown in FIG. 4, in order to cope with this, the central portion of the roll holding portion 42 is cut off and the film roll 23 is held by the upper and lower sides, thereby reducing the contact area with the film roll 23. There is.
Further, as shown in FIG. 6, the roll holding portion 45 is formed integrally with the film support base 44 fixed to the back cover 3, and the uneven portion 46 for reducing the contact area with the film roll 23 is formed on the inner surface thereof. It is also effective to form.

As described above, the cartridge 2 is attached to the case back 3 side.
0, if the film roll 23 is held, the curling habit of the film itself is regulated by the back cover 3, and
In parallel with the work of attaching the back cover 3 to the main body base 2, the cartridge 20 and the film roll 23 are loaded to improve the work efficiency.

FIG. 7 shows the outer appearance of a lens-fitted film unit according to the third embodiment of the present invention, and FIG. 8 shows the outline of its overall structure. Patrone 20, film 21,
Further, the unit main body 1 having a built-in photographing mechanism and a winding mechanism includes a main body base 50, a front cover 51, and a back cover 52,
These are made by plastic molding. As will be described later in detail, after loading the cartridge 20 and the film 21 on the main body base 50, the front cover 51 and the back cover 5 are inserted.
2 is fixed to the main body base 50, and the loaded cartridge 2
The user cannot take out 0 or the film 21.

A substrate chamber 55 and a film roll chamber 56 are formed on the substrate 53 of the main body base 50 at regular intervals, and openings 55a and 56a are provided on the lower surfaces of the chambers 55 and 56, respectively. As a result, the cartridge 20 is attached to the main body base 50.
When loading the film 21 and the film 21, the film 21 is pulled out from the cartridge 20 in a dark room and the film roll 23
Then, these can be loaded from the bottom side through the openings 55a and 56a. In addition, film 2
It is also possible to load the cartridge 20 before pulling out 1 and then pull out the film 21 into the film roll chamber 56.

Patrone chamber 55 and film roll chamber 56
A planar connecting portion 57 is provided between the and, and an exposing frame (corresponding to the exposing frame 10 in FIG. 1) is formed in the connecting portion 57. A rectangular frame 58 is formed around the patrone chamber 55, the film roll chamber 56, and the connecting portion 57, and the opening 55a for loading the patrone 20 and the film roll 23 is formed on the lower surface of the frame 58. An opening communicating with 56a is formed. A fork (corresponding to the fork 14 in FIG. 1) that engages with the winding core 28 of the cartridge 20 is provided in the upper portion of the cartridge chamber 55. And
This fork is integrated with the winding knob 60,
By rotating the winding-up knob 60 in the direction of the arrow in the drawing, the winding core 28 is rotated in a direction in which the film 21 having been photographed is drawn into the cartridge 20. A tooth row 60a is formed on the outer circumference of the winding knob 60, and a check claw 60b made of a leaf spring is engaged with the tooth row 60a. The check claw 60b is for preventing the winding knob 60 from rotating clockwise.

The main body base 50 further includes a number display plate 6
1, a shutter mechanism including a locking lever 62, a shutter drive lever 63, a shutter blade 64, a driven sprocket 65 (FIG. 9) and the like is provided. In FIG. 9 showing the details of this shutter mechanism, the shutter button 66 is integrated with a plate 67, and this plate 67 is provided with a front cover 51 via a shaft 68.
It is rotatably attached to. Further, a rod 69 extending rearward is planted in the plate 67.

Locking lever 62 provided on the body base 50
Is rotatable about a shaft 71, and its bent piece 62
A spring 72, whose one end 72a is locked to a, is urged in the clockwise direction. The lower end of the bent piece 62a has a rod 69 that is planted on a plate 67 that is integral with the shutter button 66.
Is in contact with. Therefore, when the shutter button 66 is pushed down, the locking lever 62 is rotated counterclockwise via the rod 69. Further, the locking lever 62 is provided with a winding stop claw 62b that engages with a tooth row 60a formed on the outer circumference of the winding knob 60 and prevents the winding knob 60 from rotating.

As is well known, the film 21 is provided with perforations 21a, and eight perforations correspond to the length of one film frame. This perforation 21a has a driven sprocket 6 with eight teeth.
5 is engaged, and one rotation of the driven sprocket 65
The film 21 is sent for just one frame. A cam 74 having a notch 74a formed on the outer periphery is provided coaxially with the driven sprocket 65, and the claw 62c of the locking lever 62 is in contact with the outer periphery of the cam 74. Then, when the film 21 is wound up in the direction of the arrow in the drawing, the cam 74 is rotated counterclockwise together with the driven sprocket 65.

A shutter drive lever 63 provided on the main body base 50 is rotatable about a shaft 76, and the shutter drive lever 63 is urged counterclockwise by a spring 72 whose one end 72b is attached to a spring receiver 63a. ing. The shutter drive lever 63 contacts the protrusion 62d of the locking lever 62 as shown in FIG. 8, and is held at the position shown in FIG. 10A against the bias of the spring 72. An L-shaped bent piece 63b is formed on the shutter drive lever 63, and the tip of the bent piece 63b faces the shutter blade 64 as shown in FIG.

The shutter blade 64 is rotatably attached to the main body base 50 by a shaft 64a and is urged counterclockwise by a spring 64b, and normally contacts a stopper (not shown) to a position shown in the figure. It has stopped. In this state, the photographing aperture 78 formed on the main body base 50 is blocked by the shutter blades 64. Then, when the projection 62d of the locking lever 62 is disengaged from the shutter drive lever 63 as shown in FIG. 10B, the shutter drive lever 63 is rotated counterclockwise by the bias of the spring 72,
By the bent piece 63b of the shutter drive lever 63, the claw 63c provided at the end of the shutter blade 64 is kicked off.
The shutter blade 64 opens the photographing opening 78. And
When the bent piece 63b of the shutter drive lever 63 gets over the claw 64c, the shutter blade 64 is pulled back by the spring 64b to block the photographing opening 78 again.

The driven sprocket 65 is further coaxially provided with a cam 80 for shutter charging, and after the shutter drive lever 63 opens and closes the shutter blades 64 as described above, as shown in FIG. The nail 64
c fits into the notch 80a of the cam 80. This cam 80
Rotates together with the driven sprocket 65,
Following the winding of the film 21, the film 21 rotates counterclockwise. When the cam 80 rotates in this manner, the notch 80
The claw 64c fitted in a is pushed by the outer peripheral surface of the cam 80, and the shutter drive lever 63 rotates counterclockwise and returns to its original position.

The driven sprocket 65 is further provided with a one-tooth gear 82 coaxially. The one-tooth gear 82 meshes with a tooth row 61 a formed on the outer periphery of the number display plate 61. Therefore, when the driven sprocket 65 makes one rotation, the one-tooth gear 82 also makes one rotation, and the number display plate 61 is rotated by one scale. A scale for displaying the number of sheets is provided on the upper surface of the number-of-sheets display plate 61 corresponding to the rotation pitch thereof. Since this scale is the number of films that can be photographed at that time, that is, the remaining number display scale, this scale is used for the front cover 51.
By observing through the display window 83 formed in, it is possible to confirm the number of frames of the film that can be photographed.

As shown in FIG. 8, a plate-shaped lens holder 85 is attached to the front surface of the shutter blade 64. A concave portion 85a is formed in the lens holder 85 at a position corresponding to the photographing opening 78, and a lens 86 made by plastic molding is arranged in the concave portion 85a.

The shutter button 6 is provided on the upper surface of the front cover 51.
6, an opening 87 for exposing 6 is formed.
The shutter button 66 can be pressed through the button 7. A light-shielding tube 8 for the finder is provided on the front surface of the front cover 51.
8, a circular opening 89, and a rectangular small hole 90 are provided. The opening 89 is formed so as to be located on the optical axis of the lens 86, and the small hole 90 is formed at a position corresponding to the locking claw 91 provided on the main body base 50. By engaging the locking claw 91 with the small hole 90, the front cover 51 can be temporarily fixed to the main body base 50.

The back cover 52 is composed of a back plate 93 and a bottom plate 94 and has a substantially L shape. The light shield cylinder 8 of the front cover 51 is provided on the back plate 93.
An opening 95 is formed at a position corresponding to 8, and is used as a finder eyepiece. Further, as shown in FIG. 7, the horizontally long opening 96 formed in the back plate 93 is used for the winding knob 6
Part of 0 is exposed to the outside. A curved film support surface 98 is formed on the inner surface side of the back plate 93 to regulate the position of the film 21 positioned in the exposure frame of the main body base 50, and also serves as a guide surface when the film 21 moves during winding.

When the back cover 52 is assembled to the main body base 50,
The bottom plate 94 is located on the lower surface of the substrate 53, and the patrone chamber 5
5, an opening 55 formed at the bottom of the film roll chamber 56
a and 56a are covered. Therefore, when each of the cartridge 20 and the film roll 23 is loaded in a predetermined position of the main body base 50 and then the back cover 52 is covered, the film 21 is stored in the unit main body 1 in a light-tight state. After that, the main body base 50 and the back cover 52, and further the front cover 51 and the side edges 52a and 52b of the back cover 52 are fixed by ultrasonic welding.

The operation of the above configuration is as follows.
When the shutter button 66 is pushed down from the initial state shown in FIG. 10A, the locking lever 62 is rotated counterclockwise by the rod 69. When the locking lever 62 rotates in this manner, as shown in FIG.
The engagement of the shutter drive lever 63 by the projection 62d is released, and the shutter drive lever 63 is rotated counterclockwise by the bias of the spring 72. This shutter drive lever 63
The rotation of the shutter blades 64 opens and closes the shutter blades 64 to expose the film 21 located in the exposure frame.

When the locking lever 62 rotates counterclockwise to open and close the shutter blades 64 as described above, the pawl 62c comes out of the notch 74a of the cam 74. And
As shown in FIG. 10C, the shutter drive lever 63
The projection 63d engages with the upper edge of the projection 62d of the locking lever 62, whereby the locking lever 62 is held in the same position against the bias of the spring 72. Also, the locking lever 6
Since the second claw 62b is retracted from the tooth row 61a formed on the outer circumference of the winding knob 60, the rotating operation of the winding knob 60 is allowed.

When the winding knob 60 is rotated in the clockwise direction in FIG. 9 after one shot is thus taken, the winding core 28 of the cartridge 20 is rotated via the fork directly connected to the winding knob 60. The film 21 which has been photographed is drawn into the cartridge 20. When the film 21 is pulled into the cartridge 20, the driven sprocket 65 rotates counterclockwise, and the cam 7 moves accordingly.
4, 80, and the one-tooth gear 82 rotates. When the cam 80 rotates, the shutter drive lever 6 is driven by the cam surface.
The third claw 63c is pushed, and the shutter drive lever 63 is rotated clockwise. As a result, as shown in FIG. 10D, the projection 63d of the shutter drive lever 63 retracts from the projection 62d of the locking lever 62, and the locking lever 62 is rotated clockwise by the bias of the spring 72. Then, the protrusion 62d of the locking lever 62 enters the right edge of the protrusion 63d of the shutter drive lever 63, and the claw 62c abuts the outer periphery of the cam 74.

When the film 21 is moved by one frame and the driven sprocket 65 reaches one rotation, the notch 7 of the cam 74 is removed.
The claw 62c of the locking lever 62 is fitted in the 4a, and the locking lever 62 is further rotated clockwise. This allows the cam 74
Is prevented from rotating, and the claw 62 of the locking lever 62 is prevented.
b engages with the tooth row 60a of the winding knob 60, and the rotation of the winding knob 60 and the driven sprocket 65 is blocked. In this way, the winding of the film 21 is completed, and FIG.
As shown in (A), the rotation of the shutter drive lever 63 in the counterclockwise direction is returned to the initial state in which it is locked by the protrusion 62d of the locking lever 62. When the driven sprocket 65 makes one rotation, the number display plate 61 advances by one scale through the one-tooth gear 82, and the number of remaining frames that can be photographed is displayed through the display window 83.

A cam 61 is provided on the lower surface of the number display plate 61.
b is integrally provided. The cam 61b is used to wind the winding knob 60 after the photographing of the last frame of the film 21 is finished.
The rising piece 6 of the locking lever 62 in the process of rotating the
2e is contacted, and the locking lever 62 is rotated counterclockwise. At the same time, the toothless portion 61c of the number display plate 61 moves to the meshing position with the one-tooth gear 82. Locking lever 6
When 2 is rotated in this manner, the pawl 62c is moved to the cam 74.
The driven sprocket 65 becomes free from the notch 74a, and the number display plate 61 does not rotate even if the one-tooth gear 82 rotates. Therefore, even if the winding knob 60 is rotated in this state, the winding stop is stopped. All of the film 21 can be wound into the cartridge 20 without wearing. In this way, if all of the film 21 is wound into the cartridge 20, it becomes easy to take out the cartridge at the developing station.

Further, as shown in FIG. 11, the number display plate 61 is provided with a display portion T (for example, 3 to 4 sheets) for the number of idle shots for testing in addition to the prescribed number of 24 sheets, for example. A margin for the rear end side of the film 21, that is, the side fixed to the core 28 of the cartridge 20 is applied to this aerial shot portion. Therefore, by using this portion, it is possible to inspect the operation of the shutter and the operation of the film feed even after the lens-fitted film unit is assembled.

According to the above shutter mechanism, the winding core 28 is directly rotated by the winding knob 60 via the fork engaging with the winding core 28 of the cartridge 20.
When the photographed film 21 is wound up by one frame while adopting a simple structure for winding 1, the rotation of the driven sprocket 65 and the rotation of the winding knob 60 are blocked by the common locking lever 62. Therefore, it is possible to improve the reliability of the one-frame fixed length feeding while the shutter mechanism has a simple structure suitable for the lens-fitted film unit.

12, 13 and 14 show the fourth embodiment of the present invention.
An example is shown. A major difference from the above-mentioned embodiment is that the film roll chamber is provided with a take-up shaft so that the film can be taken up in a bright room. In this example,
A winding knob 103 is provided on the lower portion of the front surface of the main body base 100 in which an opening 102 for exposing the taking lens 101 is formed. Behind the opening 102 and the finder window 104, light-shielding cylinders 105 and 106 whose inner surfaces are formed in a stepwise manner are provided so that light entering through the opening 102 and the finder window 104 does not cause unnecessary diffuse reflection. Has been done.

As shown in FIG. 13 showing the cross section of the main part, a shutter 107 is provided behind the taking lens 101,
Further, an exposure frame 108 is formed behind it. A cartridge chamber 111 for loading a cartridge 110 on the right side of the exposure frame 108 as viewed from the front of the main body base 100.
However, a film roll storage chamber 112 is provided on the left side. The winding shaft 1 is provided in the film roll storage chamber 112.
13 is provided, and the unexposed film 21 is housed in a state in which it is pre-wound on the winding shaft 113. Then, one end 21a of the film 21 pulled out from the film roll storage chamber 112 is fixed to a core 114 rotatably provided on the cartridge 110, behind the exposure frame 108 and further through an entrance 110a of the cartridge 110. There is.

In FIG. 14 showing a cross section of the main part as seen from the rear of the main body base 100, the core 114 of the cartridge 110 is shown.
Is partially exposed from the bottom surface of the cartridge chamber 111, and the fork 116 integrated with the gear 115 is engaged therewith. Since the gear 115 is adapted to interlock with the winding knob 103 via the gear 117,
By rotating the winding knob 103, the winding core 1
The film 21 can be wound around the film 14. The take-up shaft 113 rotatably provided in the film roll storage chamber 112 projects from the bottom surface of the film roll storage chamber 112, but its tip does not reach the bottom surface of the main body base 100. .

A groove 113a for engaging a driver is formed at the tip of the winding shaft 113. Then, the driver can be inserted through the opening 118 formed in the bottom surface of the main body base 100, and the film 21 can be wound around the winding shaft 113 by rotating the driver. In order to prevent the user from performing such an operation, the shape of the groove 113a may be changed and a dedicated jig may be used to perform this work.

With the above arrangement, the lens-fitted film unit can be assembled as follows. That is, one end of the cartridge 110 fixed to the core 114 of the cartridge 110 and only the film leader portion on the other end of the cartridge 110 is pulled out to the cartridge chamber 111.
To load. Thereafter, the leading end of the film leader portion is attached to the winding shaft 113 in the film roll storage chamber 112, and the back cover 119 is brought into close contact with the main body base 100 as in the above embodiment.

As a result, the inside of the main body base 100 is kept in a light-shielded state. Then, a driver or the like is inserted through the opening 118 formed in the bottom surface of the main body base 100, and the winding shaft 113 is rotated counterclockwise in FIG. 13 to remove the unexposed film 21 in the cartridge 110. It can be wound around the winding shaft 113 of the roll storage chamber 112. Thus, the work of winding the unexposed film 21 around the winding shaft 113 can be performed in a bright room.

When using the lens-fitted film unit thus assembled, the shutter button 120
After shooting by pressing, the winding knob 103 is rotated. As a result, the core 114 of the cartridge 110 is shown in FIG.
Since it rotates in the counterclockwise direction, the photographed film 21 comes to be caught in the cartridge 110. Therefore, in the state where all the photographing is completed, the photographed film 21 is stored in the cartridge 110, and the lens-equipped film unit can be disassembled or destroyed in the bright room to take out the cartridge 110.

[0059]

As described above, since the film supporting surface is formed to be curved on the back cover, it has a single plastic molding lens and a simple single exposure function. It is possible to improve the image quality of a part, and it is possible to obtain a very excellent effect in practical use that a photograph with good image quality can be obtained even though it is a very inexpensive lens-fitted film unit. When loading the film, one end of the winding shaft is exposed to the outside of the unit, and an uneven portion that can be connected to the winding means is formed on the exposed portion, so that the film can be loaded in a bright room. When manufacturing the lens-fitted film unit, it is possible to efficiently manufacture it without requiring a darkroom operation. Furthermore, since the exposed film is wound up in the cartridge, the film can be taken out at the developing station in a bright room.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a lens-fitted film unit according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the lens-fitted film unit according to the first embodiment of the present invention.

FIG. 3 is an external view of a lens-fitted film unit according to the first embodiment of the present invention.

FIG. 4 is an exploded perspective view of a lens-fitted film unit according to a second embodiment of the present invention.

FIG. 5 is a sectional view of an essential part of a lens-fitted film unit according to a second embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view showing a modified example of a film support member used in the lens-fitted film unit of the second embodiment of the present invention.

FIG. 7 is an external view of a lens-fitted film unit according to a third embodiment of the present invention.

FIG. 8 is an exploded perspective view of a lens-fitted film unit according to a third embodiment of the present invention.

FIG. 9 is a schematic view of a shutter mechanism used in the lens-fitted film unit according to the third embodiment of the present invention.

10 (A), (B), (C), and (D) are operation explanatory views of the shutter mechanism shown in FIG.

11 is a plan view showing a modified example of the number-of-photographed image display plate used in the shutter mechanism shown in FIG.

FIG. 12 is an external view of a lens-fitted film unit according to a fourth embodiment of the present invention.

FIG. 13 is a cross-sectional view of essential parts of a lens-fitted film unit according to a fourth embodiment of the present invention.

FIG. 14 is a cross-sectional view of essential parts of the film unit with lens according to the fourth embodiment of the present invention as seen from the back side.

[Explanation of symbols]

 1 Unit Main Body 2 Main Body Base 3 Back Cover 10 Exposure Frame 11 Film Roll Room 12 Patrone Room 20 Patrone 21 Film 23 Film Roll 28 Core 50 Main Body 51 Front Cover 52 Back Lid 55 Patrone Room 56 Main Body 110 Patrone 111 Patrone Chamber 112 Film Roll Storage Room 113 Winding Shaft 114 Revolving Core 118 Opening

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Matsumoto 210 Naka Nakanuma, Minamiashigara City, Kanagawa Prefecture, Fuji Photo Film Co., Ltd. (72) Inventor Gosei Nariaki 2-26-30 Nishiazabu, Minato-ku, Tokyo Fuji Photo Film Co., Ltd. (72) Inventor Seiji Asano 1-324 Uetakecho, Omiya City, Saitama Prefecture Fuji Photo Optical Co., Ltd. (72) Inventor Toshio Yoshida 1-324 Uetakecho, Omiya City, Saitama Prefecture Fuji Photo Optical Co., Ltd. (56) References JP 59-218433 (JP, A) JP 47-9180 (JP, JP, 9180) A) Actual exploitation Sho 57-139940 (JP, U) Actual exploitation Sho 49-75340 (JP, U) US Patent 3896467 (US, A)

Claims (2)

[Claims] 1. A lens-fitted film unit in which an unexposed film is built in advance, and a shutter means is operated on the film to apply exposure through an exposure applying mechanism. An unexposed film roll is arranged on one side, a cartridge having a rotatable winding core inside is arranged on the opposite side of the film exposure frame, and one end of the unexposed film and the winding core are fixed beforehand. , A film winding operation means of the unit is connected to a winding core rotatably supported in the cartridge, and the unexposed film can be wound into the cartridge after the shutter means is operated. The unexposed film roll is formed by being pulled out from the state of being stored in the cartridge in the manufacturing process of the unit. A single lens made of plastic is used for the shooting lens, while the film exposure surface is a concave curved surface from the film side toward the lens surface by the curved restriction surface of the back shield part. A film unit with a lens that is characterized by. 2. A lens-fitted film unit in which an unexposed film is built-in in advance, and exposure is applied through an exposure applying mechanism by operating a shutter means on the film, a film exposure frame in the unit. An unexposed film roll is arranged on one side, a cartridge having a rotatable winding core inside is arranged on the opposite side of the film exposure frame, and one end of the unexposed film and the winding core are fixed beforehand. , A film winding operation means of the unit is connected to a winding core rotatably supported in the cartridge, and the unexposed film can be wound into the cartridge after the shutter means is operated. In the manufacturing process of the unit, it is pulled out from the state of being stored in the cartridge by the winding means separate from the unit. A winding shaft for forming the unexposed film roll is provided in the unexposed film roll housing, and one end of the winding shaft is fitted into a hole opened to the outside of the unit through a light shielding structure, The lens-fitted film unit, wherein one end of the winding shaft is formed with an uneven portion that engages with the winding means.