JPH0227337A - Magazine for photographic film - Google Patents

Abstract

PURPOSE:To surely form a light shielding structure of a lip part, and also, to simplify the assembly by providing a film passage for forming a state that a film is inserted and held extending from the lip part to the inside direction, and using it as a light shielding part. CONSTITUTION:The title magazine is provided with a film passage 20 for forming a state that a film F is inserted and held extending from a lip part 11 to the inside direction of a magazine body 10, and due to existence of this passage 20, the inside of the magazine is maintained in a light shielding state. The film passage 20 is constituted by forming a flat bag-like or cylindrical part 21, providing a fixing part 22 on its base part, inserting the cylindrical member 21 toward the inside of the lip part 11, and fixing it to an end part of the lip part 11 by the fixing part 22. It is desirable that the cylindrical part 21 is curved in order to guide the film F into the magazine. Also, as for a material for forming the cylindrical part 21 and the base part 22, it is desirable that at least the surface for coming into contact with the film F has conductivity exceeding a prescribed numerical value known as a static electricity preventing countermeasure, and for instance, the cylindrical part 21 is formed by a conductive synthetic resin.

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 "magazine", but in this specification, unless otherwise specified, these will be collectively referred to as "magazine"). Regarding magazines for photographic film.

[Prior Art] A film commonly known as one-ten roll film is housed in a synthetic resin container generally called a cartridge, and a slit is provided at the film outlet (hereinafter referred to as lip portion). By running a film inside this slit, the inside is shielded from light.

On the other hand, in the case of 35-inch roll film, it is generally stored in a so-called single magazine type fully bent container (generally called a patrone) that consists only of the original roll. In this cartridge, a velvet-like cloth material (teremp) is attached to the inside of the lip part to shield the inside of the container from light.

[Problem to be solved by the invention] In recent years, cameras that use 35mm roll film,
As seen in so-called compact cameras and single-lens reflex cameras, cameras with advanced functions such as autofocus, automatic frame advance, continuous high-speed shooting, and automatic rewind are widely used.

However, when looking at the film used in such cameras, despite the rapid advances in photographic performance, the traditional type, which is housed in a metal cartridge, is still widely used. Currently, there are many people who cannot set a 35-layer roll film because it is not easy to use.

Therefore, in order to further popularize cameras, we made it possible for anyone to easily set film by making the conventional cartridge similar to a one-ten roll film cartridge, improving the cartridge to make it easier to set, etc. It is necessary to

In order to make this a reality, there are of course issues related to peripheral technologies such as changes to the camera mechanism and consideration for application to automatic processing, but there are also issues such as production technology, performance, functionality, etc. There are many problems to be solved.

For improvements, considering mechanical constraints, production technology, cost, etc., it seems essential to use synthetic resin materials that can be mass-produced at low cost in complex shapes. It is necessary to use a simple method.

Following the conventional terempu method not only requires complicated assembly work, but when the film is loaded and unloaded at high speed, the terempu fibers may fall off or static electricity may be generated due to contact with the film. This is not desirable because it may adversely affect the image.

In view of the above, the main purpose of the present invention is to clarify a synthetic resin magazine with an improved light-shielding structure of the lip portion.Other objects and benefits of the present invention are as described below and attached. It will be clear from the drawings.

[Means for Solving the Problems] The photographic film magazine of the present invention which achieves the above object is a photographic film magazine made of synthetic resin that can be directly loaded into a camera. In addition, ■The film path is provided with a meandering section, and ■The inner surface of the film path is treated to prevent static electricity. It is characterized by:

[Function] A film passage of a certain length is prepared toward the inside of the lip portion, and the stored film F is guided to the outside through this passage, so this passage serves as a light-shielding structure. The interior of the magazine is maintained in a light-tight state.

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

FIG. 1 shows a cross-sectional view of an embodiment of the present invention.
Reference numeral 10 denotes a magazine main body, and a film passage 20 is provided inward from the lip portion 11 to sandwich the film F. Due to the existence of this passage 20, the inside of the magazine is maintained in a light-shielded state. Ru.

To configure the film path 20, as shown in FIG.
A flat bag-like or cylindrical member 21 is formed, a fixing part 22 is provided at the base thereof, the cylindrical member 21 is inserted toward the inside of the lip part 11, and the fixing part 22 is attached to the end of the lip part 11. It is preferable to fix it.

The cylindrical portion 21 is preferably curved in order to guide the film F into the magazine 10.

The material for forming the cylindrical portion 21 can range from hard to soft, but it is preferable that at least the inner surface is made of a smooth material that causes less friction with the film F. It is also preferable to apply silicone oil or the like or to perform surface treatment such as Teflon treatment to reduce friction.

Furthermore, the materials for forming the cylindrical portion 21 and the base portion 22 are as follows.

It is preferable that at least the surface that comes into contact with the film F has a conductivity higher than a certain value known as an anti-static measure. Forming a conductive coating on the inner surface of the shaped portion 21 is preferably applied.

As shown in FIG. 3, it is effective to provide a meandering part in the cylindrical part 21 whose inside becomes the film passage 20 in order to improve the light shielding performance. However, since the presence of this meandering portion may increase friction with the traveling film F, it is desirable to limit the size and number of the meandering portion.

The size of the film passage 20 needs to take light shielding performance and friction with the film F into consideration. That is, film passage 2
If 0 is too large, light will easily enter, and if it is too small, friction with the film F will increase and there is a risk of static electricity being generated.

The size of the film path 20 also depends on its length. That is, as long as the film path 20 is long enough to go around the inside of the magazine, for example, there is no need to consider the incidence of light, and the path may be quite gradual.

Although not shown, the present invention also includes a mode in which a fixing part such as the fixing part 22 is provided at the tip of the cylindrical part 20 and is fixed to the inner wall of the magazine body IO.

Furthermore, in the present invention, in order to facilitate loading into the camera, the distance of the lip portion 11 to the opening is approximately 5 cm, based on the point where the tangent to the magazine body IO and the lip portion II intersect at right angles. For the same purpose, as shown in FIG.
It is also preferable that the upper surface is a flat surface.

The light-shielding structure of the present invention was researched as the optimal one when the magazine is constructed of synthetic resin, and is different from the conventional 35
It is possible to apply the present invention to cartridges such as thin-layer roll film cartridges and one-ten roll film cartridges.

[Effects of the Invention] With the light-shielding structure of the present invention, even if the external shape of the magazine body is complex, the lip portion can be easily shielded from light, and the ays do not fall off like in conventional telescopes. Since the generation of static electricity can be suppressed as much as possible, the above-mentioned purpose can be achieved.

[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 the same essential parts, and FIG. 3 is a sectional view showing another embodiment. In the figure, each symbol indicates the following. F: Film 10: Magazine body 11: Lip portion 20: Film passage 21: Cylindrical portion 22: Base Patent applicant Konica Co., Ltd. Representative Patent attorney Nobuaki Sakaguchi・ ... - parable 0 -
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Claims (1)

[Claims] 1. In a photographic film magazine made of synthetic resin that can be directly loaded into a camera, a film passageway is provided in which the film is sandwiched inward from the lip portion to serve as a light-shielding portion. A magazine for photographic film featuring 2. The photographic film magazine according to claim 1, wherein the film path is provided with a meandering section. 3. The photographic film magazine according to claim 1 or 2, wherein the inner surface of the film passage is treated to prevent static electricity.