JPH04335639A - Photosensitive material housing container - Google Patents

Abstract

PURPOSE:To improve the form of an existent cartridge film without changing an existent developing processing system in order to miniaturize a camera. CONSTITUTION:The outer diameters of the long boss 11 and the short boss 12 of the spool and the winding shaft of a cartridge for a 135 type photographic film(film housing container) 20 are kept as existent dimension, and the outer diameter of a flange is made small by about 5mm. In accordance with that, the external dimension of the cartridge is made small and the dimension in the width direction of the container(cartridge) 20 is made 2-4 times as wide as that in a winding diameter direction. Then, the camera where it is loaded is miniaturized, and the existent developing processing system can be used as it is. The thickness of a used film supporting body is set to be 50-100mum.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a photosensitive material storage container, particularly a cartridge for photographic film.

0002

[Prior Art] Generally, a cartridge for photographic film is shown in Fig. 4.
As shown in the figure, it consists of a spool, a cartridge body, a cartridge cap that supports the bosses on both sides of the spool, and a photographic film wound around the spool.Before use, the photographic film is unexposed and most of it is wound around the spool. The film is placed in the cartridge body in an open state, with only the film tongue end 4a peeking out from the cartridge outlet, and is fed out of the cartridge body within the camera for image exposure. After image exposure, the film is placed in the cartridge body again. It is designed to be rolled up inside the fuselage. Such a photographic film cartridge has photographic film wound around a spool made of synthetic resin, which is housed in a metal body. A cartridge having such a structure is known as a 135 type cartridge according to JIS, and a light shielding member called a telemp is provided on the cartridge body at the film exit. As shown in Figure 4, the film winding diameter dimension of the 135 type cartridge (film storage container) is J.
24 as specified in S.K.7519-1982.
．． The width is 9 to 25.3 mm, and the width is 42.4 to 25.3 mm.
It is 44.4mm.

0003

[Problems to be Solved by the Invention] Currently, many people desire to make cameras smaller and lighter in weight, but the biggest factor preventing such miniaturization has been the size of the cartridge.

On the other hand, the strength and physical properties of the support of photographic films have been improved, and the graininess of photographic film emulsions has also been improved. As a result, both the support and the emulsion layer applied thereto can be made thinner.

[0005] When such a photographic film is put into a cartridge, which is a film storage container, pulled out, photographed, and then rewound into the cartridge after photographing is completed, the film is Due to its springiness, the tape tries to spread in the large space inside the cartridge, hits the inner wall of the cartridge, and then is pulled out or wound up while rubbing against the inner wall, which can cause malfunctions such as scratches. .

In order to avoid this, it is possible to make thinner photographic film, but rather by reducing the outer diameter of the cartridge that stores it, scratches can be prevented and the camera can be protected. It may also become possible to promote miniaturization.

[0007] In addition, in conventional cartridges, if the cap is attached from both sides of the cartridge body, the ends of the cartridge body or
There have been cases where one or both of the caps have been crushed. As the outer diameter of the cartridge body becomes smaller, the strength of the body made of metal plates of the same thickness will be significantly improved, and it is thought that production yields can also be improved.

SUMMARY OF THE INVENTION In view of this background, an object of the present invention is to realize miniaturization of a film storage container and an accompanying miniaturization of a camera.

[0009]

[Means for Solving the Problems] This object is achieved by using a photographic film support having a thickness of 50 to 100 μm and a width of 3 μm.
This is achieved by a photosensitive material storage container that stores a photosensitive material with a thickness of 5 to 70 mm and is characterized in that the size in the width direction is 2 to 4 times the size in the film diameter direction of the container. Ru.

0010

Embodiments An embodiment of the present invention will be described with reference to a perspective view of a cartridge film in FIG. 1, a sectional view of a spool in FIG. 2, and a plan view of a film end locking portion in FIG.

3 with perforations on both sides
The end portion 4b of the photographic film 4 having a width of 5 mm is cut out on both sides to become narrow, and a locking hole 5 is formed. On the other hand, the spool 1 has a short boss 12 and a long boss 11 at both ends, a flange 2 inside each, a winding shaft 13 inside the flange, and a film end portion 4b in the center. A guide pawl 7 is provided above the slit hole 3 and the inner surface of the slit hole 3, and two locking pawls 6 are provided below. When the film end portion 4b is inserted into the slit hole 3, the center portion of the film is pressed toward the lower surface of the slit by the upper guide claw 7, so that the film end portion 4b slides on the back of the locking claw 6. The locking hole 5 advances and enters the locking pawl 6, and the locking of the film 4 to the spool 1 is completed. Then, winding and withdrawal can be performed.

The outer diameters of the long boss 11 and short boss 12 of this spool are equal to the outer diameter of the winding shaft 13 inside the flange 2.

The thickness of the film support used in the present invention is 50 to 100 μm, which is thinner than that of conventional film supports.
The thickness of the emulsion layer coated on it is equal to or less than that of the conventional emulsion. Therefore, if the length of the film is the same as that of the conventional film, the outer diameter of the roll can be reduced. This allows the outer diameter of the flange 2 to be reduced, and can easily be reduced to about 5 mm. Accordingly, the outer diameters of the cartridge body 21 and cap 22, which house the film scroll wound on the spool 1, are also reduced by 5 mm or more, resulting in miniaturization. As shown in the perspective view of FIG. 1, the outer diameter of the cap 22 of the cartridge 20 with the film tip end 4a peeking out from the drawer opening is approximately 20 mm, making it possible to make the diameter much smaller than conventional caps. Ta.

[0014] Since the outer diameter of the cartridge 20 can be reduced in this manner, it is possible to design a camera into which this cartridge film is loaded with a smaller size.

At the same time, the buckling strength of the patrone body 21, which is bent from a metal plate of the same thickness, has increased as the outer diameter has become smaller, and even if the thickness is made thinner than before, the buckling strength will be the same or It can be more than that. Therefore, a reduction in yield due to crushing of the cartridge body 21 in the process of fitting the caps 22 on both sides of the cartridge body 21 can be avoided, thereby increasing the contribution to productivity improvement.

[0016] Also, the cartridge body 21, the cap 22
And since the outer diameter of the spool flange 2 can be reduced by about 5 mm, the space for unwinding the film 4 inside the cartridge is appropriate, and the phenomenon of the film hitting the inside of the cartridge barrel due to the spring action is alleviated. Scratches no longer occur.

By using the film 4 and the cartridge 20, the camera can be made extremely compact, and it has become possible to increase photographic opportunities for many people.

Furthermore, in the cartridge of the present invention, the outer diameters of the long boss 11 of the spool, the short boss 12, and the winding shaft 13 are not changed, so the cartridge of the present invention can be loaded into a current developing processing machine without being different from the conventional one. It becomes possible to carry out development processing.

In this example, a non-adhesive paper type spool and a film end shape were used, but a type in which the spool and film end are engaged using adhesive paper can also sufficiently achieve the object of the present invention. .

Furthermore, although this embodiment has been described with respect to a 35 mm wide film and a cartridge, it can be similarly applied to a 70 mm wide film or any film with an intermediate width between 35 mm and 75 mm, and the size of the container in the winding diameter direction can be similarly applied. It has become possible to increase the size in the width direction by two to four times the size.

[0021]

[Effects of the Invention] With the cartridge of the present invention, the miniaturization of cameras can be further promoted, and the needs of many people can now be met.

[0022] Furthermore, the cartridge-packed film of the present invention can be used without modifying the automatic processors installed in many laboratories. Furthermore, the scratches that occur on the film on the inside of the cartridge can be completely eliminated for a small cartridge, increasing the strength of the cartridge, improving production yield, and reducing the thickness of the material of the cartridge body. It has become possible to make the material thinner, reducing the overall volume and contributing to reductions in material costs.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a cartridge film according to an embodiment of the present invention. FIG. 2 is a sectional view of the spool. FIG. 3 is a plan view of the film end locking section. FIG. 4 is a perspective view of a conventional cartridge.

[Explanation of symbols]

Claims (1)

[Claims] Claim 1: The thickness of the photographic film support is 50 to 100 mm.
μm, and the width of the support is 35 to 70 mm, and the container is characterized in that the size in the width direction is 2 to 4 times the size in the film winding diameter direction. Container for storing photosensitive materials.