JPH0733237Y2 - Film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a photographic film packaging unit (hereinafter referred to as "lens film unit") to which an exposure function for photographing has been added in advance.

[Conventional technology]

In conventional photography, a camera is usually loaded with a film. However, few people carry the camera with them at all times, and there was the inconvenience that the camera was not at hand when shooting. In that case, you can purchase the lens-fitted photo film unit from the nearest store at a low price like you would buy a regular photo film, and after taking the photo, request the DPE for each lens-fitted photo film unit as you would for a conventional photo film. It would be very convenient if possible.

In order to meet such needs, the applicant first released a film with a lens, “Shasharun” (trade name).
This lens-equipped film comes in a cartridge 110
Since the film is used, the image quality was not sufficiently satisfactory when the enlargement ratio was increased during printing. Therefore, it has been desired to complete a lens-fitted film by using a 35 mm size film that is not contained in a cartridge.

[Problems to be solved by the invention]

In such a lens-equipped film unit using a 35 mm film, it is preferable to use a film-containing cartridge defined in the international standard ISO 1007-1979. The one using this patrone was previously proposed in Japanese Utility Model Application No. 61-126942, but the unexposed film is pre-wound and wound into the patrone at each shooting. In such a unit, if the film is moved carelessly, the intervals between the pieces are displaced, resulting in a decrease in value as a product. It is also possible to apply a braking force with a sprocket to feed the film to prevent the film from slipping, but this also increases the cost.

The present invention has been made in view of the above circumstances, and an object thereof is to propose a lens-fitted film unit which has a simple structure and which greatly reduces the gap between the film frames.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a lens-fitted film unit having a taking lens and means for exposing an unexposed film pre-installed through the taking lens, which is wound in a roll shape, and the roll of the film unit is rolled. An unexposed film placed in the film storage chamber,
A film cartridge having a film inlet arranged in a film winding chamber of the film unit, wherein an exposed film is taken in through the inlet every time a film is photographed. The film cartridge which is formed, the film passage formed between the roll film storage chamber and the film winding chamber, and a gently curved film passage, and abutting the film surface on the opposite side to the exposed surface of the film outside the exposure frame, It is characterized in that it comprises a regulating member for partially curving the film in a direction opposite to the film passage, and the regulating member applies a frictional force to the film caught in the film cartridge.

[Action]

According to the present invention, the regulating member disposed outside the exposure frame contacts the film surface, so that the film is partially curved in the direction opposite to the film passage. As a result, a frictional force is applied to the film wound in the film cartridge, so that the film can be prevented from being unintentionally loosened.

[Example of device]

Hereinafter, preferred embodiments of a lens-fitted film unit according to the present invention will be described in detail with reference to the accompanying drawings.

In this embodiment, the most popular international standard ISO1
An example using a lens-fitted film unit that uses a 135 film with a cartridge defined in 007-1979 will be described.

FIG. 1 shows the overall structure of a lens-fitted film unit according to the present invention, in which 10 is a unit body, 12 is a front cover, and 14 is a front cover.
Is a back cover, and these are made by plastic molding, and are the main members of the lens-fitted film unit. As will be described later, the front cover 12 and the back cover 14 are joined to the unit main body 10 from the front and back, and then fixed by ultrasonic welding described later.
The 16 cannot be removed from the unit body 10.

As shown in FIG. 2, the film unit is formed into a rectangular parallelepiped shape as a whole after assembly, and as a form covered with a paper box (not shown), a shutter button hole opened in the paper box,
It is possible to perform shooting operations through a lens hole or the like.

First, the unit body 10 will be described. A cartridge storage chamber 20 and a roll-shaped film storage chamber 22 are formed on the substrate 18 at predetermined intervals, and the lower surfaces of the cartridge storage chamber 20 and the roll-shaped film storage chamber 22 have openings 20A, 22A. Therefore, the film 16 is loaded into the cartridge storage chamber 20 and the roll-shaped film storage chamber 22 from below. In the film unit according to the present invention, the film 16 is wound into a roll and the tip is fixed to the core of the patrone 24, and the film which has been photographed is sequentially stored in the patrone for each photographing operation. As a method for this, the film 16 is loaded into the cartridge storage chamber 20 while being stored in the cartridge 24 in the manufacturing process of the unit, and then wound into a roll and stored in the storage chamber.
Alternatively, the film 16 may be unwound from the cartridge 24 in the dark room, put into the roll state 26, and then loaded into the storage chambers 20, 22 from the lower surface of the unit body.

Between the cartridge storage chamber 20 and the roll-shaped film storage chamber 22 of the unit main body 10, there is a flat connecting portion 25, and this connecting portion 25 is formed with an exposure frame. Patrone storage room 2
0, a roll-shaped film storage chamber 22, a rectangular frame 28 is formed around the connecting portion 25, and the lower surface of the frame 28 is a storage chamber.
Openings communicating with the openings 20A and 22A of the openings 20 and 22 are formed.

A hoisting knob 30 is pivotally supported on the upper part of the cartridge storage room 20,
A not-shown fork is formed on the rotating shaft of the hoisting knob 30, and is engaged with the spool shaft 32 of the cartridge 24. Therefore, by rotating the hoisting knob 30 in the direction of the arrow in the figure, the photographed film 16 is stored in the cartridge 24 from the roll-shaped film storage chamber 22.

Further, the unit main body 10 is provided with a photographing mechanism including a photographing 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 opening 42 shown in FIG. 3 during the shutter release operation. A plate-shaped lens holder 44 is provided on the front surface of the shutter blade 40. Lens holder 44
A concave portion 46 is formed at a position corresponding to the opening 42, and a plastic photographing lens 48 is arranged in the concave portion 46.

Next, the front cover 12 will be described. Front cover 12 top plate 60
A shutter button opening 62 is formed in the shutter button opening, and a shutter button 64 is arranged in the shutter button opening 62. The shutter button 64 is pushed down,
The shutter lever 38 and the like of the photographing mechanism described above are activated. Further, a window 66 for displaying the number of shots is formed in the upper plate 60, and the number of shots of the display plate 34 is displayed in this window 66. A finder light-shielding cylinder 70 is formed on the front surface 68 of the front cover 12. Further, a circular hole 72 for photographing is formed on the front surface 68, and the circular hole 72 is formed so as to be located on the optical axis of the photographing lens 48. Further, rectangular small holes 76, 76 are formed on the left and right sides of the photographing opening 72. The rectangular small holes 76, 76 are formed at positions corresponding to the locking claws 78, 78 formed on the unit body 10. It is used as a stop when connecting the unit body 10 to the front cover 12.

Next, the structure of the back cover 14 will be described. The back cover 14 is composed of a back plate 80 and a bottom plate 82 in a substantially L shape. A finder opening 84 is formed in the back plate 80, and the finder opening 84 is formed at a position corresponding to the light shielding cylinder 70 of the front cover 12. Further, a laterally long opening portion 86 is formed in the back plate 80, and a part of the hoisting knob 30 is exposed after assembly in the opening portion 86 as shown in FIG. Can be rotated. Further, a curved film support surface 88 is formed on the back plate 80, and the curved support surface 88 is provided with a large number of minute projections. Even if there is dust etc. due to this protrusion, it will enter between the protrusions and not scratch the film. Also curved support surface
Since the whole 88 does not contact the film, it has the effect of reducing the film resistance. The film 16 moves along the film supporting surface 88 when the winding knob 30 is rotated.
Further, the bottom plate 82 of the back cover 14 is located below the substrate 18 when the back cover 14 is assembled to the unit main body 10, and the opening 20A formed at the bottom of the cartridge storage chamber 20 and the roll-shaped film storage chamber 22, 2
It will cover 2A. A groove 89 is provided on the periphery of the film support surface 88.
As shown in FIG. 3, the ridge portion 29 of the unit body 10 is fitted in the groove 89, and due to this unevenness, the cartridge storage chamber 20, the roll film storage chamber 22, and the exposure frame portion are shielded from light. Will be done. Therefore, the film 16 is housed in the main body 10 in a light-tight state. At this time, as shown in FIG. 3, a gently curved film passage 90 is formed between the unit body 10 and the back cover 14. Film 16 is a storage room
It is sent to the passage 90 from 22 and further enters the storage chamber 20 from this passage 90, and the storage chamber 22, the passage 90 and the storage chamber 20 form a film feeding passage.

As shown in FIG. 3, a projection 100 as a regulating member is formed from the back cover 14 in the vicinity of the outlet of the film storage chamber 22. The protrusion 100 is brought into contact with the film 16 located outside the exposure frame when the back cover 14 is attached to the unit body 10. As a result, the film 16 is on the lower side in FIG.
Partially curved. Therefore, the film 16 has the protrusion 10
A frictional force is given by 0.

Due to the formation of the protrusion 100, the film 16 has a slight resistance of 50 g.
It was found that the film deviation can be prevented by adding ~ 200 g. The resistance given to the film 16 is 200g
It was found to be extremely heavy above the range, which is not preferable as a film unit with a lens. Especially the protrusion 100
It was found that if the resistance caused by the provision of 80 to 120 g is in the range of 80 to 120 g, the hoisting knob does not have a heavy operation feeling and is good for shifting the pieces. This resistance is the torque of the winding knob.
It is within the range that the shift of 320gcm to 800gcm is applied when 50 to 200g is given, in order to prevent actual displacement of the piece and not to feel heavy operation.

In the above experiment, the torque is the radius of the hoisting knob 30, in this case 1.
Calculated from the force applied to the outer circumference of the knob at 6 cm.

According to the lens-fitted film unit of the present invention constructed as described above, when the front cover 12 is pushed into the unit body 10 during assembly, the locking claws 78, 78 are formed in the holes of the front cover 12.
The front cover 12 is temporarily fixed by being locked by the 76, 76. In this state, the film 16 is loaded into the unit body 10 from the lower surface of the unit body 10. Next, when the back cover 14 is joined to the unit main body 10, the projections 29 of the unit main body 10 are fitted into the grooves 89 of the back cover 14, whereby the film 16 is light-tightly stored in the film chamber. .

Next, the operation of the lens-fitted film unit will be described. When the release button 64 in the lens-fitted film unit is operated, the shutter blade 40 opens and closes to expose the film 16 located in the exposure frame. Then, when the winding knob 30 is rotated, the cartridge shaft 32 rotates, and the exposed film 16 moves to the left in the passage 90 in FIG.
It is stored in the Patrone 24. At the same time, the frame for the next film is supplied from the film storage chamber 22 to the exposure frame, and accordingly, the display plate 34 is rotated, the shutter is charged, and the preparation for shooting is completed. On the other hand, since the film 16 is provided with a resistance force by the projection 100, the film 16 does not loosen in the film feeding path.

In this way, the exposed film 16 is caught in the cartridge 24. Then, after all the frames have been shot, they are submitted to the photofinishing shop as they are. At the photo lab, open the back cover 14 and open the patrone 24 with the film already taken.
Take out, perform the conventional development and baking process,
The negatives and prints are returned to the user.

In the above-described embodiment, the 135 film is used for explanation, but the size and format of the film are not limited to this. Further, the film is not limited to one which is loaded in a state of being ejected from the cartridge in advance, but a type in which a winding member is provided so that the film is extruded from the cartridge by the winding member each time an image is taken can be applied. (In this case, it is necessary to rewind to the cartridge by the rewinding member.) The sensitivity of the film used in the present invention is ASA100, 200, 4
Any of 00, 1000, 1600, etc. may be used.

[Effect of the Invention] As described above, according to the lens-fitted film unit of the present invention, the regulating member is brought into contact with the film surface outside the exposure frame, and the film is curved in the direction opposite to the film passage, so that the film cartridge is formed. Since frictional force is applied to the film to be caught, careless loosening of the film can be prevented. Therefore, the gap between the film frames can be greatly reduced with a simple structure.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a lens-fitted film unit of the present invention, FIG. 2 is an assembled perspective view of a lens-fitted film unit, and FIG. 3 is a side view of the lens-fitted film unit of the present invention. 10 ... Unit body, 12 ... Front cover, 14 ... Back cover, 16 ... 135
Film, 20 ... Patrone storage room, 22 ... Film storage room, 40 ... Shutter blade, 48 ... Shooting lens, 90 ... Film passage, 100 ... Projection

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Asano 1-324 Uetakecho, Omiya City, Saitama Prefecture Fuji Photo Koki Co., Ltd. Kikai Co., Ltd. (56) Reference JP-A-55-143549 (JP, A) Actually opened 63-118028 (JP, U) Dutch patent 6708486 (NL, A)

Claims (3)

[Scope of utility model registration request] 1. A lens-fitted film unit having a taking lens and means for exposing a pre-exposed film through the taking lens, which is wound in a roll and placed in a roll film accommodating chamber of the film unit. A film patrone having an unexposed film and a film inlet arranged in the film winding chamber of the film unit, and the exposed film passes through the inlet and the internal portion every time a film is photographed. A film cartridge which is designed to be rolled into the film, a gently curved film passage formed between the roll film storage chamber and the film winding chamber, and a film surface opposite to the exposed surface of the film outside the exposure frame. And a regulating member that abuts against the film and partially bends the film in a direction opposite to the film passage. A film unit with a lens, wherein the regulating member applies a frictional force to the film caught in the film cartridge. 2. The lens-fitted film unit according to claim 1, wherein the regulating member is a protrusion provided in the vicinity of the outlet of the film storage chamber. 3. The regulating member has an insertion torque of 320 to 800 when inserting the exposed film into the film cartridge.
The film unit with lens according to claim (1), characterized in that it is set to gcm.