JPH0651444A - Film unit provided with lens - Google Patents

Abstract

PURPOSE:To obtain a hand-portable film unit by making a unit main body thinner. CONSTITUTION:The shape of a film room 20 is narrowed in the direction of an optical axis 7a, and also, elongated in a film feeding direction. A pair of spool shafts 23 and 24 is arranged in the film room 20 so that they may be separated in the film feeding direction. The film pulled out of a cartridge 22 is wound between the pair of spool shafts 23 and 24 in a track shape. Then, the shape of a film roll stored in the film room 20 can be made flat without increasing a film take-up torque, so that the thickness of the unit main body can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-fitted photo film unit having a thin unit body for convenient carrying.

[0002]

2. Description of the Related Art A lens-fitted film unit manufactured and sold by the applicant of the present invention [Sharp Run Hi (trade name)]
As disclosed in, for example, Japanese Patent Publication No. 2-32615, an unexposed film is built in advance in a unit main body having a simple photographing mechanism, and the film exposed for each photographing is stored in the international standard Patrone main body. I have been involved in. The unit main body includes a main body base and front and rear covers attached to the front and rear of the main body. The main body base is provided with a cartridge chamber and a film chamber on the left and right of the taking lens. In the cartridge chamber, a cartridge previously defined in ISO 1007-1979 of the international standard ISO is stored, and in the film chamber, a film drawn from the cartridge and wound into a roll is stored.

In such a film unit, the unit main body is designed compact so that it can be carried easily, but the thickness thereof is slightly larger than the diameter of the cartridge. Since this thickness cannot be put in a breast pocket of a shirt or the like, development of a film unit which is convenient to carry and which can be stored in the breast pocket by reducing the thickness of the unit main body to, for example, a cigarette size is underway.

[0004]

By the way, as shown in FIG. 4, the unit main body 50 has a thickness of the taking lens 51.
And the space of the film chamber 55 for storing the cartridge 52 and the film chamber 55 for storing the film 54 drawn from the cartridge 52 in a roll. Therefore, in order to further reduce the thickness of the unit main body 50, it is necessary to shorten the focal length or reduce the space of the cartridge chamber 53 and the film chamber 55.

To shorten the focal length is to use the photographing lens 5
This can be easily achieved by using a wide-angle lens for the lens 1. However, in order to reduce the space of the cartridge chamber 53, it is necessary to reduce the diameter of the cartridge 52. If the size of the cartridge 52 is reduced, it is impossible to provide a print photograph at a low cost due to a design change of development processing equipment and the like. Further, since a part of the unit main body 50 corresponding to the cartridge chamber 53 is used as a grip in the film unit, if this part is thinned, camera shake may occur during shutter release. Furthermore, if the space of the film chamber 55 is made smaller, the film 54 wound in a roll shape is replaced by the film chamber 55.
Since it is pressed by the inner wall of the film, its shape cannot be maintained in a perfect circular shape, the winding torque of the film 54 increases, and scratches occur during film feeding.

The present invention has been made in view of the above background, and an object of the present invention is to provide a lens-fitted film unit which is thin in unit body and convenient to carry.

[0007]

In order to achieve the above object, in the lens-fitted film unit of the present invention, the unexposed film drawn from the cartridge is wound around two axes arranged with a gap in the film feeding direction. It is attached so that it can be stored in the film chamber.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 shows a lens-fitted film unit of the present invention (hereinafter, simply referred to as a film unit). The film unit 2 is composed of a unit body 5 including a body portion 3 and a grip portion 4, and an exterior body 6 wound around the unit body 5 in a strip shape. The main body 3 is provided with a taking lens 7 and a finder 8, and the thickness thereof is thin so that it can be easily put in a breast pocket of a shirt, for example.

The grip part 4 has a release button 9,
A counter display window 10 and a winding knob 11 are provided, and the wall thickness of the counter display window 10 is slightly thicker than that of the main body portion 3 so that the wall thickness can be reliably held. The exterior body 6 is for improving the appearance of the unit body 5, and is made of cardboard that is decorated by color printing. For this reason, in the film unit 2, since photographing is performed with the exterior body 6 attached, the exterior body 6 has an opening for exposing the taking lens 7 and the finder 8.

FIG. 1 shows the inside of the unit body. The unit main body 3 is composed of a main body base portion 15, a front cover 16 and a rear cover 17 which are fixed to the front and rear of the main body base portion 15. An exposure chamber 18 is formed in the center of the main body base 15, and a cartridge chamber 19 and a film chamber 20 are formed at both ends. A cartridge 22 in which an unexposed film 21 is drawn out is stored in the cartridge chamber 19, and a film 21 wound in a track shape around a pair of winding shafts 23 and 24 is stored in the film chamber 20, respectively. In this embodiment, the cartridge 22 of the size specified by the international standard is used.

In order to reduce the thickness of the main body portion 3, the shape of the film chamber 20 is narrowed in the optical axis direction of the taking lens 7 and is extended in the film feeding direction, for example, in the lateral direction of the unit main body 5. Therefore, the pair of winding shafts 2
3, 24 are arranged in the lateral direction of the unit body 5 so as to be separated from each other. As shown in FIG. 2, one winding shaft 24 has a groove 25.
A holding portion 25 including a and a biasing piece 25b is provided. The urging piece 25b presses the film 21 inserted in the groove 25a against the inner wall of the groove 25a to sandwich it.

An exposure opening 26 is formed on the front side of the exposure chamber 18 as shown in FIG. 1, and a shutter mechanism 27 and a diaphragm opening 28 are formed between the exposure opening 26 and the front cover 16. The lens holding plate 29 and the taking lens 7
They are arranged in order from the main body base 15 side. Note that reference numeral 7
Reference symbol a indicates the optical axis of the taking lens 7.

As shown in FIG. 2, the rear cover 17 is provided with a bottom plate 35 for shielding the bottom of the body base 15 and a back plate 36 for shielding the back of the body base 15. The bottom plate 35 has a step portion 3 for preventing the cartridge 22 and the winding shafts 23 and 24 from sliding up and down at positions corresponding to the cartridge chamber 19 and the film chamber 20, respectively.
7, 38 are provided. The winding shaft 2 is attached to the step portion 38.
A pair of groove-shaped notches 3 into which the lower ends of 3, 24 are inserted
9, 40 are formed. The notches 39 and 40 engage the winding shafts 23 and 24 and prevent them from sliding in the film feeding direction.

The film loading of the film unit 2 is carried out in the dark room of the factory as follows. The pair of winding shafts 23 and 24 and the cartridge 22 are set on a loading jig (not shown). This loading jig has winding shafts 23, 2
These are rotatably held so that the distance between the shaft cores of No. 4 is L1 and that between the winding shaft 24 and the cartridge shaft 22a is L2. The distance L1 is the distance between the axes of the winding shafts 23 and 24 arranged in the film chamber 20 shown in FIG. 1, and the distance L2 is the distance between the cartridge shaft 22a and the axes of the winding shaft 24 shown in FIG. It is a distance.

The tip of the film exposed from the cartridge 22 is pulled, folded back by the winding shaft 23, and then inserted into the holding portion 25. After this, the loading jig
2 is rotated clockwise in the figure, the unexposed film 21 pulled out from the cartridge 22 is wound around the winding shafts 23 and 24 in a track shape as shown in FIG. Since the film withdrawal amount at this time is measured by detecting the perforation, it is possible to stop the winding operation while leaving some film 21 in the cartridge 22. Therefore, the tip of the film 21 does not come off from the holding portion 25.

After the winding operation is completed, the loading jig moves,
Put the cartridge 22 in the cartridge chamber 19 and the pair of winding shafts 2
The track-shaped films 21 wound on the films 3 and 24 are inserted into the film chambers 20, respectively. At this time, the winding shaft 23,
The upper end of 24 is fitted in a groove (not shown) formed in the upper inner wall of the film chamber 20. After this, the rear cover 1
When 7 is attached to the main body base 15, the lower ends of the winding shafts 23 and 24 are fitted into the notches 39 and 40, respectively. As a result, the winding shafts 23 and 24 are prevented from sliding horizontally in the film chamber 20. Therefore, the film 21 wound in the shape of a track is prevented from slidingly contacting the outer peripheral surface of the film 21 with the inner wall of the film chamber 20 when being wound up.

The film unit 2 having the above structure
The action of will be described. At the time of shooting, grip the grip portion 4 with the right hand to perform framing. After that, when the release button 9 is pressed with the index finger of the right hand, the shutter mechanism 2
7, the light from the subject passes through the taking lens 7, the diaphragm opening 28, and the exposure opening 27 and is imaged on the film 21 behind the exposure chamber 18. Since the grip portion 4 has an appropriate thickness and can be firmly gripped by the right hand, camera shake does not occur during release.

When the winding knob 11 is operated after the photographing is finished, the patrone shaft 22a is rotated via a fork (not shown) of the patrone chamber 19 to expose the exposed film 21.
Is sent in the direction of the arrow in the figure and is caught in the cartridge 22. At the same time, the unexposed film 21 wound around the pair of winding shafts 23 and 24 is fed to the back of the exposure chamber 18. By the way, the unexposed film 21 is wound in the initial stage of film winding. When the film 21 is further wound in this state, the winding shafts 23 and 24 rotate counterclockwise, respectively, so that the film 21 can be smoothly fed. Film 2 fed in this way
Since 1 does not rub against the inner wall of the film chamber 20,
The film 21 is not scratched.

Since the thickness of the main body 3 is tapaco, it can be stored in a chest pocket of a shirt or the like and carried after taking a picture. Also, after this, shooting was repeated,
When the prescribed photographing is completed, the winding knob 11 is rotated to wind the leading end of the film 21 into the cartridge 22. Although the leading end of the film 21 is held by the holding portion 25, this holding is performed only because the film 21 is sandwiched between the biasing piece 25b and the inner wall of the groove 25a. Therefore, the winding knob 11 is strongly rotated. It can be easily canceled by doing.

The present invention has been described above with reference to the above embodiment in which the shape of the cartridge chamber is not reduced as compared with the conventional one. However, even if a thin cartridge is used and the shape of the cartridge chamber is reduced from the conventional one, the present invention Can have the same effect.

[0021]

As described above in detail, in the lens-fitted film unit of the present invention, the unexposed film pulled out from the cartridge is wound around two axes arranged with a gap in the film feeding direction. Since the film chamber can be housed in the film chamber, the film chamber can be changed from the conventional perfect circular shape to the track shape narrowed in the optical axis direction of the taking lens, so that the thickness of the lens-equipped film unit can be made thinner. You can

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the inside of a unit body embodying the present invention.

FIG. 2 is an explanatory view showing a state in which a film is loaded in the unit main body.

FIG. 3 is a perspective view showing an appearance of a lens-fitted film unit of the present invention.

FIG. 4 is a cross-sectional view showing the inside of a conventional unit body.

[Explanation of symbols]

 2 film unit 3 body part 4 grip part 5 unit body 7 shooting lens 11 winding knob 19 patrone chamber 20 film chamber 21 film 22 patrone 23, 24 winding shaft 37, 38 step portion 39, 40 notch

Claims (1)

[Claims] 1. A unit main body incorporating a taking lens, a winding mechanism, etc., a cartridge chamber formed in the unit main body for accommodating a cartridge, and a film chamber accommodating an unexposed film extracted from the cartridge, A lens-fitted film unit in which an exposed film is wound into a film cartridge for each shooting, and the unexposed film is wound around two axes arranged with a gap in the film feeding direction and stored in the film chamber. A film unit with a lens that is characterized by.