JPH0227334A - Magazine for photographic film - Google Patents

Abstract

PURPOSE:To simplify the assembling method of a light shielding structure of a lip part and to reduce the cost by providing a pair of light shielding members for bringing the surface and the reverse side of a film into press-contacting with a lip part of a magazine in which at least a drum part is formed by a synthetic resin material. CONSTITUTION:As for a magazine 10, at least its drum part is formed by a synthetic resin material (conductive synthetic resin material desirably), and on the inside of its lip part 11, an elastic material whose base part 21 is fixed to the lip part 11, for instance, a pair of light shielding plates 20 formed by a film-like plate are placed. Since the surface and the reverse side of a film F are brought into press-contacting with the lip part by this light shielding plate 20, the inside of a magazine container is brought to light shielding. A pair of light shielding plates 20 are provided so as to be inclined in the direction for taking out the film F and placed on the inside of the lip part 11, and also, the constitution for forming the lip part 11 in a recessed shape and placing the film F in its bottom part, bringing it into press-contacting by the light shielding plate 20 having elasticity from the reverse side of the film F, and bringing the inside of a container to light shielding, etc. are adopted.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a container for storing a photographic material in a light-shielded state and loading it into a camera (these containers are generally magazines, cartridges, cartridges, etc.). There are various types called.

In this specification, unless otherwise specified, these items will be collectively referred to as "magazine".

More specifically, the present invention relates to an improved magazine made of a synthetic resin material, and particularly to a synthetic resin magazine having an improved light-shielding lip structure.

[Prior Art] A film container (generally called a cartridge) used for a film commonly called one-ten roll film is made of two synthetic resin materials, and has a main roll part that stores unused film. The camera is of a so-called double magazine type, in which a connecting part is formed to integrate the winding part 1 for storing the photographed film and the two parts.

On the other hand, in the case of 35 mm roll films, those stored in a so-called single magazine type metal container (generally called a cartridge) consisting only of the original roll are widely used.

A special type of foreign-made cartridge is a synthetic resin cartridge with a double magazine system similar to one-ten roll film cartridges.

In conventional double magazine type cartridges,
The interior of the container is shielded from light by providing a slit at the entrance and exit of the film.

On the other hand, in conventional 35 mm roll film cartridges, the interior of the container is shielded from light by pasting a velvet-like cloth material (teremp) on the inside of the lip.

[Problem to be solved by the invention] In recent years, cameras using 35mm roll film have been equipped with high-end features such as autofocus, automatic frame advance, continuous high-speed shooting, and automatic rewind, as seen in so-called compact cameras and single-lens reflex cameras. Functional devices are becoming widespread.

However, when looking at the film used in such cameras, despite dramatic advances in photographic performance, the traditional type, which is housed in a metal cartridge, is still widely used. The current situation is that

In the case of so-called one-ten roll film, those stored in compact cartridges have been used since early on, making it very easy to set it in the camera, and compared to the 35mm roll film stored in a cartridge. It is clear that there is a huge difference in ease of use, and there are many people who cannot set the 35 Hosho Rolf 4 frame on their camera.

Possible ways to make it easier for anyone to set film are to make the conventional cartridge similar to a one-ten roll film cartridge, or to improve the cartridge to make it easier to set the film. In order to make this a reality, it goes without saying that changes to the camera mechanism and connection with peripheral technologies such as consideration for application to automatic development processing will be issues, but production technology, performance, functions, etc. There are many issues that need to be resolved in this field.

Considering the material, the improved model has one mechanical limitation,
Considering production technology, costs, etc., it is not a good idea to construct the cartridge from metal like the conventional cartridge, but it seems essential to use a synthetic resin material that can be mass-produced at low cost even in complex shapes.

In order to manufacture magazines at low cost, the light-shielding structure of the lip part needs to be easily assembled, but the conventional telescope method not only requires complicated assembly work, but also requires fast loading and unloading of film. If this is done, the M/11IIK of Terempu may fall off and adhere to the film, which may adversely affect the image, which is not preferable.

The present invention has been created in view of the above. 1. The main purpose of the present invention is to clarify a synthetic resin magazine, particularly a synthetic resin magazine with improved light-shielding properties at the lip portion. Other objects and advantages of the present invention will become apparent from the following description.

[Means for Solving the Problems] The magazine for photographic film of the present invention that achieves the above object is made of synthetic resin, and includes a pair of light-shielding members that press the front and back surfaces of the film in the lip portion; The light shielding member has a pair of elastic members that are inclined in the direction of taking out the film, and is arranged on the outside or inside of the lip part, and furthermore, a groove is provided in one of the members constituting the lip part to prevent the film from being removed. The present invention is characterized in that a member is provided which forms a passage and presses the film in the groove direction from the back side of the film.

[Example] Next, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a cross-sectional view of an embodiment of the present invention.
A pair of light shielding plates 20 made of an elastic material, such as a film-like plate, with a base 21 fixed to the lip part 11 are arranged inside the lip part 11, and the light shielding plates 20 protect the surface of the film F and the surface of the film F. The inside of the container is shielded from light by pressing the back surface.

The light shielding plates 20 are not directly attached to the inside of the lip portion 11 as shown in the figure, but the present invention also includes an embodiment in which a member to which a pair of light shielding plates 20 are fixed in advance is inserted inside the lip portion 11 (not shown). included in.

As shown in FIG. 2, the light-shielding plate 20 may be arranged outside the lip portion 11, but in such an embodiment, it is necessary to shield the side portions 22 of the pair of light-shielding plates 20. For example, as shown in the figure, the tip 12 of the lip 11 is extended to block light from the side. In order to further ensure light shielding, although not shown, it is preferable to provide the inner wall of the tip portion 13 with irregularities corresponding to the inclination of the light shielding plate 20.

In the embodiment shown in FIG. 3, the lip portion 11 of the magazine body 1O is formed into a concave shape, and the film F is placed at the bottom of the lip portion 11, and is pressed from the back side of the film F by a light shielding plate 20 that increases elasticity. This protects the inside of the container from light.

In FIG.
A bending portion 13 that is bent along an inclination of 0
This figure shows an embodiment in which the light-shielding property is further ensured by providing the following.

The larger the contact surface between the light-shielding plate 20 and the film F, the better the long-distance light performance, but this is probably because static electricity is generated due to friction, especially when the film F is run at high speed. Therefore, it is desirable to take anti-static measures such as imparting conductivity and lowering the friction coefficient to at least the surface of the light-shielding plate 20 that comes into contact with the film F.In addition, the magazine of the present invention has at least a body made of synthetic resin. (preferably conductive synthetic resin material).

[Effects of the Invention] With the light-shielding structure as in the present invention, even if the outer shape of the magazine body is complex, the lip portion can be easily shielded from light, so the above-mentioned purpose can be achieved. be.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a perspective view showing another embodiment, and FIGS. 3 and 4 are perspective views showing still other embodiments. In the figure, each symbol indicates the following. F: Film 10; Magazine body 11: Lip portion 12: Tip portion of the lip portion 13: Bent portion of the lip portion 20: Light shielding plate 21: Base of the light shielding plate 22: Side portion of the light shielding plate

Claims (1)

[Scope of Claims] 1. A magazine for photographic film, which is made of synthetic resin and is characterized in that a pair of light-shielding members are provided in the lip portion to press the front and back surfaces of the film. 2. The photographic film magazine according to claim 1, wherein the light shielding member is a pair of elastic members inclined in the direction of taking out the film. 3. The magazine for photographic film according to claim 1 or 2, wherein the light shielding member is disposed outside the lip portion. 4. The photographic film magazine according to claim 1 or 2, wherein the light shielding member is disposed inside the lip portion. 5. A magazine for photographic film, characterized in that one of the members constituting the lip portion is provided with a groove to form a film passage, and a member is provided that presses the film from the back side of the film in the direction of the groove.