JP2555782Y2 - Film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a film unit with a lens in which a film is preliminarily incorporated in a unit body having a photographing function.

[Conventional technology]

The applicant has provided a disposable camera, such as a film unit with a lens (trade name "Kareru Hi"), which allows the user to easily enjoy photography by simply pressing the shutter without performing operations such as loading a film. . This film unit with a lens can be taken out to a developing dealer after photographing, and does not require a troublesome operation such as taking out a photographed film. At the photo lab, the patrone containing the photographed film is taken out and developed.

For this reason, in a film unit with a lens, a film drawn from a patrone is stored in a wound state in a film loading chamber, and the film is wound into the patrone in the patrone chamber for each photographing. By the way, there has been attempted a film unit with a lens in which the film loading chamber is widened to accommodate a film of 36 shots in place of a film of 24 shots, thereby enabling more shooting.

[Problems to be solved by the invention]

However, in the above-described wide film loading chamber, when the remaining amount of the film in the film loading chamber is small, the rolled film starts dancing, and when rubbed on the inner wall of the film loading chamber, the image recording area of the film is damaged. Occurs. In addition, if the film starts dancing during shooting, a blur occurs in the shot image, which causes a problem that a good image cannot be obtained.

[Purpose of the invention]

The present invention has been made in view of such a technical background.In order to prevent the film in the film storage room from dancing, the image recording area of the film is not scratched, It is an object of the present invention to provide a film unit with a lens capable of capturing a complex image.

[Means for solving the problem]

In order to achieve the above object, the present invention forms a pair of first and second ribs on the inner wall surface of the film loading chamber, which contact the upper and lower ends of the outermost film of the film roll,
The film near the outlet of the film loading chamber is bent by the second rib to separate the image recording area from the inner wall of the film loading chamber, and between the film loading chamber and the film support surface by the first rib and the second rib. Is formed.

[Action]

According to the above configuration, it is possible to reduce the friction between the film loading chamber inner wall and the film and prevent the image recording area from being damaged,
In addition, the bent film becomes stronger.

An embodiment of the present invention will be described below with reference to the drawings.

〔Example〕

FIG. 5 shows the appearance of an embodiment of the film unit with a lens according to the present invention. The lens-fitted film unit 2 comprises a decorated paper box 3 and a unit body 4 loaded in the paper box 3, and the photographing is performed as it is. The unit body 4 includes a photographing lens 5, a finder 6, a release button 7, a counter window 8, and a winding knob 9.
And the like are exposed to the outside through an opening formed in the paper box 3.

FIG. 2 shows the inside of the unit main body 4. The unit main body 4 includes a main body 10, a front cover 11, and a rear cover 12 integrally formed of plastic. The photographic lens 5 is provided between the main body 10 and the front cover 11.
A shutter device 13 that opens and closes shutter blades is provided behind the taking lens 5. Behind the shutter device 13, an exposure chamber 14 is formed, and the rear end of the exposure chamber 14 is bordered by an exposure frame 15. This exposure frame 15 has one rib 15 as a first rib.
The ribs 15a are in contact with both side edges of the film 19 as shown in FIG. 3, so that the image recording area of the film 19 is separated from the exposure frame 15 so as not to scratch the film. In addition, the load when winding the film is reduced.

A patrone chamber 16 is formed on the left side of the exposure chamber 14, and the patrone chamber 16 is an international standard (ISO 1007-19).
Houses the patrone 17 specified in (1979 version). Also,
A U-shaped film loading chamber 18 is formed on the right side of the exposure chamber 14. The film loading chamber 18 accommodates an unexposed film roll 19a drawn out of the patrone 17 and wound into a roll. The rib 15a is formed on the inner wall of the film loading chamber 18 for the same purpose.

The film 19 loaded in the main body 10 in this manner is light-tightly shielded by the rear cover 12. Thereafter, the cover 12 is fixed by ultrasonic welding or the like so that the user cannot remove it. Thereafter, a curved film regulating surface 32 that is in contact with the base surface of the film 19 is formed on the inner surface of the cover 12. The film regulating surface 32 is provided at the center thereof with a film supporting surface 33 which is in contact with the image recording area of the film 19, presses the emulsion surface against the exposure frame 15, and regulates the film surface at the exposure position.
The film support surface 33 is located between the exposure frame 15 and the film path.
Form 32a.

On the right side of the film regulating surface 32, a wall surface 35 which is a part of the inner wall of the film loading chamber 18 is formed. A pair of ribs 36 (fourth ribs) as second ribs which contact the wall surface 35 from the base surface side of the film 19 and push the film 19 toward the emulsion surface side.
(See the figure) is formed along the film feeding direction.
The ribs 36 are in contact with both side edges of the film 19 on which perforations are formed similarly to the ribs 15a, and separate the image recording area from the wall surface 35. The height of the rib 36 is gradually increased from the right end to one end of the film passage 32a on the film loading chamber 18 side. On the left side from this highest position,
The height gradually decreases, and becomes the same as the height of the wall surface 35 at the left end. For this reason, even if the film 19 is pressed against the rib 36 as shown in the drawing, the film
Does not scratch the image recording area of the film 19. Instead of the rib 36, a protrusion may be formed at a portion where the height of the rib 36 is highest.

If a plastic containing about 2% of silicon is used for the back lid portion forming the wall surface 35, friction at the time of feeding the film can be reduced, and the load at the time of film winding can be reduced. In this case, the portion on the right side of the one-dot chain line shown in FIG. 4 is integrally molded first, and thereafter, the rear cover 12 is molded by insert molding.

FIG. 1 shows the unit main body 4 with a main body 10, a front cover 11,
It is disassembled into a rear cover 12, and a lens board 25 is formed on the front surface of the main body 10. This lens board 25
Is fitted with the photographing lens 5. Also, the main unit 10
Are provided with engaging hooks 26 and 27 which engage with the front cover 11 and fix the front cover 11 so as to sandwich the lens board 25 therebetween. At the upper part of the patrone chamber 16, the above-described winding knob 9 is provided.
When the winding knob 9 is operated, the film 19 is wound into the cartridge 17.

The L-shaped rear cover 12 is provided with an opening 30 for the finder eyepiece and an opening 31 for partially exposing the winding knob 9 in addition to the film regulating surface 32. The patrone room 16 is located on the left side of the film regulating surface 32.
A wall 34 which is a part of the inner wall of the wall is formed.
34 engages with the outer peripheral surface of the patrone 17 and positions it in the patrone chamber 16.

In the film unit with a lens configured as described above, when the release button 6 is operated, the shutter 13 opens and closes, and the film 19 located on the exposure frame 15 is exposed. Thereafter, when the winding knob 9 is operated, the exposed film 19 is wound around the cartridge 17. At the same time, the next film frame is pulled out from the film roll 19a and supplied to the position of the exposure frame 15. At this time, the film roll 19a tends to be unwound due to its own rigidity, but the outer peripheral surface thereof is restricted by contacting the rib 15a, so that the film roll 19a is settled down with a predetermined diameter. When the sprocket (not shown) is rotated in synchronization with the supply of the film 19 and the one-frame fixed-length feed is detected, the winding knob 9 is locked and the preparation for the next photographing is completed.

By repeating photographing and subsequent film winding, when the remaining amount of the film in the film loading chamber 18 decreases, the thickness of the film roll 19a decreases.
As a result, the force of the film roll 19a pressing the rib 15a is weakened, and the outermost film 19 is held in the film roll 19a.
2 to the side of the rib 36 as shown in FIG. By this lifting, the film 19 is bent at the highest position of the rib 36 to give a waist, so that the film 19 does not move further to the rib 36 side. In this state, even if the winding knob 9 is operated to wind the film 19, the height of the rib 36 from the wall surface 35 is the highest at the bent portion. There is no rubbing. Also, at this bent portion, as shown in FIG.
Since the film 19 is held between the ribs 15a and 36, the film 19 located on the exposure frame 15 can be prevented from shifting even if the film 19 is unraveled.

In a camera other than the lens-fitted film unit, even if the projections are formed between the film supporting surface and the film loading chamber as described above to contact the upper and lower ends of the film, the film in the film loading chamber can be used. You can avoid dancing.

[Effect of the invention]

As described above, in the lens-fitted photo film unit of the present invention, the pair of second ribs that contact the upper and lower ends of the photo film are formed between the photo film support surface and the photo film loading chamber. And the film in the film storage room can be prevented from being danced. Further, since the image recording area is separated from the inner wall of the film loading chamber, the image recording area of the film can be prevented from being damaged. For this reason, an image photographed by the film unit with the lens is good without blur and with few scratches.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention. FIG. 2 is a sectional view of a film unit with a lens using the present invention. FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a partially broken perspective view showing a main part of the present invention. FIG. 5 is a perspective view of the lens-fitted film unit of the present invention. 4 Unit body 10 Body section 11 Rear cover 15 Exposure frame 16 Patrone room 18 Film loading chamber 19 Film 19a Film roll. 33 ... Film support surface 36 ... Rib.

Claims (1)

(57) [Scope of request for utility model registration] 1. A main body in which a film loading chamber for accommodating a film wound in a roll is formed, and an image recording area of a film mounted on a rear side of the main body and supplied from the film loading chamber. A film unit with a lens having a back cover and a film supporting surface for regulating a film at an exposure position in contact with the lens, wherein the film unit is formed integrally with the inner wall of the film loading chamber, and is formed of an outermost film of the film roll. A pair of first ribs respectively contacting the upper and lower ends, and an inner wall covering the rear side of the film loading chamber of the rear cover are formed integrally, and are connected to the pair of first ribs to form the outermost periphery of the film roll. Abut the upper and lower ends of the film, and bend the film near the exit of the film loading chamber to separate the image recording area from the inner wall of the film loading chamber. A film unit with a lens, comprising: a pair of second ribs facing the pair of first ribs to form a film passage between a film loading chamber and a film support surface.