JPH0375641A - Cartridge of roll film for photography - Google Patents

Abstract

PURPOSE:To eliminate the need for backing paper and plush by pressing a film by the elastic force of the cartridge to deform the cartridge against the elastic force. CONSTITUTION:The film F existing in a film outlet 15 is strongly pinched by the energizing force of the part A1 in an arrow direction to maintain the inside of a spool in a light shielding state while the film is not loaded in a camera. The cartridge is so constituted that the cartridge presses the film F by its elasticity when the cartridge held in the light shielding state is loaded in the camera. The part A1 of the base body A closing the slit of the film outlet 15 is brought into contact with the inside wall of the camera and is thereby deformed in the arrow direction by overcoming the elasticity when the cartridge is loaded in the camera. The slit is formed in the film outlet 15 and the pressing to the film F is simultaneously released by the deformation of the part A1 and, therefore, the film feeding is possible. The problem of light shielding is solved in this way without using the backing paper and plush.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cartridge containing a photographic roll film. More specifically, the present invention relates to a light-shielding structure in a so-called double cartridge type cartridge for storing photographic roll film, in which a film storage chamber and a film winding chamber are integrally connected by a bridge.

[Prior art] A light-shielding container for storing roll film for still photography is
The so-called single cartridge type, in which the film is pulled out of the light-shielding container during shooting and then rewound into the light-shielding container after shooting, and the so-called double cartridge type, in which the film storage chamber and film winding chamber are integrally connected by a bridge. There is. The former is used in most commercially available 35-question roll films, and the latter is used to store film for small cameras called 110 film.

It is clear that the double cartridge type is better in terms of ease of setting it on the camera, but due to the mechanism on the still camera side, the single cartridge type, called a cartridge, is used for 15mm roll film. is used exclusively. In recent years, still cameras incorporating an automatic feeding mechanism have become popular in order to facilitate film loading.

Eastman Kodak's Instamatic system and Agfa-Gevaert's Rabbit system are two examples of attempts to make it easier to load 35mm roll film into a camera and eliminate the need to rewind the film after it has been shot. The former has almost the same structure as the so-called 110 film cartridge currently on the market, but the latter uses two cartridges of the same shape that are not connected by a bridge, and the camera's take-up spool. Insert the home cassette instead of the camera, store the film you have shot one by one into the home cassette, and when all shooting is completed, remove the home cassette from the camera and place the empty cassette containing the film into the home cassette. It is used as a.

In conventional cartridges and cartridges, velvet or the like is placed at the entrance and exit of the film to shield it from light in order to prevent the film inside the light-shielding container from being exposed to light.

In addition, in commercially available double cartridges for 110 film, a light-shielding paper called a backing paper is placed on the back of the film, and a small window is provided in the bridge area so that the information shown on the backing paper is placed on the back side of the film. The structure is such that you can visually see the number of the photographed frame.

[The fi that the invention tries to solve! Title: As mentioned above, 35mm roll film is stored in a light-shielding container called a cartridge, and a small amount of the film is pulled out from the film opening of the container as a leader section. is dropped into the storage compartment, then the tip of the leader section is engaged with the film winding chamber, the back cover is closed, and the winding lever is operated to take so-called color shots several times before photographing is possible.

Recent models are available on the market in which all you have to do is set the cartridge, and then the mechanism on the camera side engages with the perforations in the reader section to automatically feed the film.

With the majority of 35m5 still cameras that do not have the above-mentioned automatic mechanism, setting up the cartridge is complicated, and many people are unable to set it up themselves.

The number of such concerns can be seen from the fact that small cameras that use so-called 110 film stored in a double cartridge type cartridge are becoming popular among beginners.

It is obvious that an integrated film cartridge in which the film storage chamber and film winding chamber are connected by a bridge is superior in terms of ease of use, and cooperation between camera manufacturers and processing services is needed. Although there are still problems, it is thought that in the future, 35 mm roll films will also be supplied in such easy-to-use cartridges.

In view of the above, the present invention has been completed as a result of a series of studies regarding cartridge storage for 35-inch roll film.In particular, the present invention is an improvement over the conventional 110-film roll film in order to provide the film at a lower cost. The main purpose of this paper is to clarify an example of a cartridge that solves the problem of light blocking when storing a film alone in a cartridge without using a backing paper or a telescope such as in a cartridge, and the present invention and others. The objects and benefits of the invention will become apparent from the following description and the accompanying drawings.

[Means for Solving the Problems] In order to achieve the above object, the present inventor has made extensive studies and has arrived at the present invention.

That is, the photographic roll film cartridge according to the present invention has a film storage chamber and a film winding chamber integrally formed via a bridge, and a photographic roll film cartridge in which a film is housed singly across both film chambers. In the cartridge, the film entrance/exit slits of both film chambers are closed in a light-shielding state so as to press the film by the elastic force of a part of the member forming the film chamber of the cartridge when the camera is not loaded, and when the camera is loaded. The present invention is characterized in that a part of the member forming the cartridge deforms against the elastic force and becomes open.

Further, in a preferred embodiment of the photographic roll film cartridge according to the present invention, (1) the closing/opening of the film entrance/exit slit is a lid release stroke in which the film chamber is kept in a light-shielding state by the camera lid; (1) By attaching an independent wedge-shaped member, the opening of the film entrance/exit slit can be performed regardless of the direction in which the cartridge is set in the camera.

[Example code] Embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a cartridge according to the present invention, and the cartridge is made of an elastic material, such as synthetic resin. The present invention is intended to store 35mm+ roll film, or can be applied as a cartridge to store roll films of other sizes.The sizes of the films described below are: for 15mm roll film. This is just an example of how it is applied.

In the figure, 1o is a film storage chamber in which unshot film F is stored wound around the original spool shaft 11. 12 is a film winding chamber;
The photographed film F is wound onto a take-up spool shaft 13.

In the above configuration, the spool shafts 11 and 13 are provided in both film chambers, but the present invention has a mode in which the spool shafts 11 and 13 are not arranged in both film chambers, and a spool shaft in only one film chamber. Including embodiments in which shafts II or 13 are prepared, and even in embodiments in which spool shafts 11 and 13 are arranged in both film chambers, only one spool shaft 11 or 13 can be rotated from the outside. (one-way drive), and one in which both spool shafts 11 and 13 can be rotated together (bi-directional drive).

Reference numeral 14 designates a bridge, and as shown in FIG. 2, at both ends thereof, there are lid portions that are covered with the upper and lower open portions of the base body A to form a light-shielded film storage chamber 10 and a film winding chamber 12. has been done. Hereinafter, the whole including the bridge 14 and the lid portions at both ends will be referred to as the bridge member B.

After all, the cartridge shown in FIGS. 1 and 2 has a structure in which a base A is sandwiched between a pair of bridge members B having the same shape. In Fig. 2, the base A is formed integrally for convenience in manufacturing and assembly, but the base A may be divided into the same shape and have a bottom shape. A cross-sectional view of the portion is shown in FIG.

As shown in FIG. 4, the base A is made of metal or synthetic resin and has a bottom shaped as shown by a solid line. When the bridge member B is attached to the base body A, it is deformed as shown by the imaginary line, and a cross-sectional view of the assembled state in which elasticity is imparted in the direction of the arrow is shown in FIG. When assembled, the A1 portion of the base body A is not fixed to the bridge member B with an adhesive or the like, and is configured to be movable in the state shown by the imaginary line. A film outlet 15 and a film inlet 16 are formed at the tip of the A1 portion. Film outlet 15 and film inlet 1
6 has the same structure and the same functions and functions, so the film exit 15 will be explained below.

The side portion of the Al section forming the film exit 15 is pressed against the bridge member B, and light is blocked from entering from this portion. As shown in FIG. 2, since the bridge member B is provided with a rising portion, a light shielding material may be placed on the inner wall surface thereof.

The present invention also includes a mode in which velvet or other light-shielding material is disposed at the tip of the A1 portion forming the film outlet 15 and the portion where the tip comes into contact with the film F sandwiched therebetween.

The state shown in FIG. 5 is a state in which the cartridge is not loaded into the camera (when the camera is not loaded), and the biasing force of the A1 portion in the direction of the arrow strongly pinches the film F at the film outlet 15 and spools the spool. The interior is shaded from light. Note that it is preferable that the film outlet 15 be configured in a stepped manner.

"When the camera is not loaded" refers to before it is loaded into the camera (before shooting) and when it is taken out from the camera (after shooting).
Due to the difference between the manner in which the photographed film F is wound up and stored in the film winding chamber 12 side, and the manner in which the photographed film F is rewound into the film storage chamber 10 side after all photography is completed, the film that needs to be protected is F is film storage room 1
0 or the film winding chamber 12.

Next, take the cartridge in the light-blocking state described above.

FIG. 6 shows a cross-sectional view of the device loaded into the camera.

The A1 portion of the base A, which presses the film F with its elasticity and closes the slit of the film outlet 15, is in contact with the inner wall of the camera showing the temporary border °C when loaded into the camera, and its elasticity increases. It is deformed in the direction of the arrow. Due to the deformation of the A1 portion, a slit is formed at the film outlet 15, and at the same time, the pressure on the film F is released, so that the film can be fed.

In the embodiment shown in FIG. 6, the direction in which the cartridge is loaded into the camera is perpendicular to the spool axis, and the cartridge is covered by the camera back cover from below in one drawing.

In an embodiment in which the cartridge is loaded into the camera in the same direction as the spool shafts 11 and 13, as shown in FIG.
A wedge-shaped member 17 is attached to the surface of the A1 portion, and the A1 portion is deformed by inserting the cartridge into the camera in the direction of the arrow. The position of the wedge-shaped member 17 is related to the time when the film outlet 15 is opened, so it is preferable that the wedge-shaped member 17 be placed at the upper part in the drawing and that it can be deformed by being pushed by the back cover of the camera.

Even in the case where the cartridge is set in the direction perpendicular to the spool axis, a wedge-shaped member 17 can be used as shown in FIG.

Further, by preparing the wedge-shaped member 17 as an independent member and attaching it to the A1 portion, the problem of different cartridge setting directions depending on the camera can be solved.

Further, closing and opening of the film outlet 15 may occur in extremely sunny environments, such as when loading or unloading the film F outdoors in the summer.
In order to completely block light even when taking out the film, it is preferable to set the release stroke to be within the range of the lid release stroke in which the film chamber is kept in a light-shielded state by the camera lid.

[R1 Bright Effects] According to the present invention, the film entrance/exit slits of the film storage chamber and the film winding chamber are closed in a light-shielding state so that the film is pressed by the elastic force of the cartridge when the camera is not loaded; When loaded into a camera, the cartridge is deformed against the elastic force and becomes open, so there is no need for a backing paper or telescope like in a conventional 110 film cartridge, and the film can be provided at a lower cost.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the cartridge according to the present invention, FIG. 2 is an exploded perspective view, FIG. 3 is a sectional view of the spool portion, FIG. 4 is a top view of the spool base, and FIG. 5 is a sectional view of the spool portion when the camera is not loaded, FIG. 6 is a sectional view of the spool portion when the camera is loaded, and FIGS. 7 and 8 are perspective views of main parts showing other embodiments. F: film 10: film storage chamber 11, spool shaft 12: film winding chamber 13 Nisbourg shaft 14: film 15: film outlet 16: film inlet 17: wedge-shaped member A; spool base B bridge member

Claims (1)

[Scope of Claims] 1. In a photographic roll film cartridge in which a film storage chamber and a film winding chamber are integrally formed via a bridge, and a film is stored singly across both film chambers, both films are When the camera is not loaded, the film entrance/exit slit of the chamber is closed in a light-shielding state so as to press the film by the elastic force of a part of the member forming the film chamber of the cartridge, and when the camera is loaded, it is closed against the elastic force. 1. A photographic roll film cartridge, characterized in that a part of a member forming the cartridge is deformed to be in an open state. 2. The camera for photography according to claim 1, wherein the switching between closing and opening of the film entrance/exit slit is performed within a range of a release stroke of the lid in which the film chamber is kept in a light-shielding state by the camera lid. roll film cartridge. 3. The photographic roll film according to claim 1 or 2, wherein the film inlet/outlet slit can be opened by attaching an independent wedge-shaped member regardless of the direction in which the cartridge is set in the camera. cartridge.