JPH06148806A - Cartridge for photographic roll film - Google Patents

Abstract

PURPOSE:To provide a cartridge for a photographic roll film capable of easily finding out the leading edge of the film all housed in the cartridge. CONSTITUTION:In the cartridge 10 of structure that the film is rolled in the cartridge up to the leading edge, leading edge floating structure for preventing the leading edge of the film from coming into contact with the back surface of a preceding rolled in film is adopted. Moreover, when the center of a spool shaft is O, the leading edge of the film is A, the projecting end of the film entrance of the cartridge is B and the internal surface of the cartridge is C, the film is rolled in so that a distance from the center O of the spool shaft is in the relation of OB<OA<OC.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin cartridge used for storing a photographic roll film in a light-shielded state.

[0002]

BACKGROUND OF THE INVENTION The 35 mm roll film, which is now in widespread use, is housed in a light-shielding container called a patrone and is a long film having continuous through holes called perforations on both sides. The base end is fixed and wound around a spool shaft in the cartridge, and the lead portion is pulled out to the outside through a slit in which a light-shielding fiber material called a so-called teremp is arranged.

The cartridges for storing the 35 mm roll film, which are commercially available in Japan, are made of metal, but there are problems in manufacturing costs, camera loading problems, miniaturization problems, reuse problems, etc. Various kinds of synthetic resin cartridges or cartridges (herein referred to as cartridges) have been proposed, for example, US Pat. No. 5,031,85.
No. 2, JP-A-3-267, 932, No. 4-4, 116, No. 4-67, 034
Japanese Patent Publication No. JP-A-2003-242242 discloses a so-called leadless type in which the entire cartridge is formed of synthetic resin and the tip of the film is also wound into the cartridge, and the film is stored by pushing out by rotating the spool shaft. There has been proposed a method of pushing the cartridge out of the cartridge. Details will be described later with reference to FIGS.

[0004]

In the conventional type cartridge, if the leading end of the film is stored in the cartridge, it is difficult to pull the film out of the cartridge only by rotating the spool shaft.

Therefore, in the cartridge described in the above publication, the film is wound by pressing both ends of the wound film by a pair of flanges attached to the spool shaft, which will be described later with reference to FIGS. In addition to preventing looseness, a stopper is provided to prevent the leading edge from being caught more than necessary, or a leading edge separating claw for separating the leading edge of the film is prepared.

However, when the above-mentioned structure is adopted, when the cartridge is resin-molded, it is complicated, for example, how to divide the insert-molding die, and the die is greatly consumed. This will increase the production cost. It is also proposed that the vicinity of the leading edge of the film is formed wider than other film portions, a V-shaped notch is formed, and a flange is engaged with the notch. Taking the process into consideration, the loss portion becomes very large unless the film has the same width from the front end to the base portion, so that it is practically impossible to carry out. Further, there is a possibility that film breakage may occur depending on the cutting condition of the cutout portion. Furthermore, a film has been proposed in which a transparent magnetic material is applied to the entire area of the film to enable recording of photographic information in a large capacity. A strong curl is generated in the width direction and the width direction, and when such a film is to be stored in the above-mentioned tip-winding type cartridge, the curl of the leading end of the film causes the leading end of the film to adhere to the back surface of the preceding film. It turned out to be an obstacle when putting out.

The present invention has been completed in view of the above, and clarifies a photographic roll film cartridge capable of easily leading the leading edge of a film entirely contained in the cartridge. The purpose is.

[0008]

A cartridge of a photographic roll film according to the present invention that achieves the above object is a cartridge having a structure in which even the leading end of the film is wound inside the cartridge. Having a tip floating structure that prevents contact with the back surface of the film, when the center of the spool shaft is O, the tip of the film is A, the tip of the film inlet and outlet of the cartridge is B, and the inner wall surface of the cartridge is C,
The film is wound such that the distance from the center O of the spool shaft is OB <OA <OC.

[0009]

DETAILED DESCRIPTION OF THE INVENTION Next, the photographic roll film cartridge according to the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 shows the principle of the cartridge according to the present invention, and is a sectional view of the cartridge 10. The roll film has a base end fixed to a spool shaft located at the center of the flange 11 and is wound, and its front end A stands still outside the flange 10. B is the tip of the film inlet / outlet 12, and C is the inner wall surface of the cartridge 10. In the cartridge according to the present invention, the respective distances from the center O of the spool shaft, OA / OB / OC, are O.
It must be set so that the relationship of B <OA <OC is satisfied. OA <OC may also be OA ≦ OC. If OB> OA, the leading end of the film cannot pass over the end of the film entrance / exit 12 and go out to the outside, and the above-mentioned tip separation claw or the like is required.

Therefore, a specific structure for keeping the leading end of the film floating outside the flange will be described.

In the embodiment shown in FIGS. 1 and 2, the flange 11 is held so as to be freely rotatable with respect to the spool shaft 13, and the film 1 is provided at a part of the rising edge of the periphery.
A notch 15 is provided to allow 4 to pass through.
On the other hand, a notch 16 as a stopper is prepared near the end of the film 14, and as shown in FIG. 3, the uncut portion 17 of the notch 15 of the flange 11 is engaged. Therefore, the notch 1 of the film 14
In the portion where 6 does not exist, the side end of the film 14 comes into pressure contact with the uncut portion 17 of the cutout 15 of the flange 11, so that the flange side is slightly deformed.

In this embodiment, when the spool shaft 13 is rotated in the winding direction, the end of the film 14 passes through the notch 15 of the flange 11, so that the film 14 is wound around the spool shaft 13 while being regulated by the flange 11. Is done
The notch 16 of the film 14 is the notch 15 of the flange.
Then, the deformed flange 11 returns to its original shape, and the uncut portion 17 of the cut 15 engages with the cutout 16 of the film 14 to stop further winding. Therefore, the position of the leading edge of the film 14 can be freely set by adjusting the position where the cut 16 is provided.

The above method can even position the leading edge of the film 14 outside the film inlet / outlet 12 of the cartridge 10.

Finally, a conventional cartridge will be described with reference to FIGS.

The difference between the illustrated cartridge and the cartridge of the 35 mm roll film for photography which is widely used at present is that the material is synthetic resin, not metal, and the tip of the film is drawn into the container. That is, there is no exposed leader portion, or only a small portion of the leading end of the film is exposed, and the stored film can be taken in and out by rotating the hub.

The cartridge shown in the figure has been devised in various ways to have the above-mentioned special structure and function.

First, the cartridge main body 50 is composed of two casings 51 and 52 made of synthetic resin into two halves, and the joints of both casings 51 and 52 are connected to both ends of a spool shaft 54 around which a film 53 is wound. Are fixed by means of adhesion or welding, except for the position where the hubs 55 and 56 are set and the portion of the film passage 58 where the light-shielding telemup 57 is attached, which is the entrance and exit of the film 53, A light-tight state is maintained inside.

Next, in order to have a function that the film 53 is wound inside the cartridge main body 50 or pushed out to the outside according to the rotation of the spool shaft 54 by the operation of the hubs 55 to 56, a conventional metal is used. It uses a structure or parts structure that did not exist in the manufactured Patrone.

To wind the film 53 into the cartridge body 50, the base end of the film 53 may be fixed to the spool shaft 54 and the spool shaft 54 may be rotated in the film winding direction. There is no difference from the structure of. However, in order to make the structure in which even the leading edge of the film 53 is wound inside the cartridge main body 50, it is necessary to consider pushing the film 53 out of the cartridge main body 50 again. Has been adopted.

That is, as shown in FIG. 5, the spool shaft 54
Flexible flanges 60 made of synthetic resin are prepared at both ends of the film 55 so as to be sandwiched between the hubs 55 and 56. The rising portions 61 of the flanges 60 allow both ends of the film 53 wound around the spool shaft 54. The portion is pressed down, and it is regulated that the film 53 is not loosened and spreads like a mainspring. As described above, since the film 53 is not loosely wound, the hub 5
The tip of the film 53 can be pushed out of the cartridge body 50 in accordance with the rotation of the spool shaft 54 by the operations of 5 to 56.

Since the flange 60 is formed of a thin film synthetic resin material, it has a flexible property, and the rising portion of the flange 60 is formed by both end portions of the film 53 which are not wound around the spool shaft 54. Since the tip end of 61 is expanded, part of the flange 60 is always deformed.

The central opening 62 of the flange 60 is
It is free to be inserted into the base 63 of the central protrusion of the hubs 55 and 56, and further fitted with the ratchet-like protrusion 65 provided at the end of the hubs 55 and 56 into the opening 64 for rotation control. The direction of rotation is restricted. That is, when the spool shaft 54 rotates in the film pushing direction, the raised side surfaces of the protrusions 65 of the hubs 55 and 56 come into contact with the end portions of the rotation control openings 64 of the flange 60, so that the flange 60 moves. When the spool shaft 54 rotates in the film winding direction, the gentle slope of the projections 65 of the hubs 55 and 56 causes the flange 60 to rotate.
Since it comes into contact with the end of the opening 63 for controlling the rotation of the flange 60, the opening 64 for controlling the rotation of the flange 60 can get over the projection 65, so that the flange 60 moves in the film winding direction of the spool shaft 54. It is free for rotation.

Next, if even the leading edge of the film 53 is caught inside the rising portion 61 of the flange 60, the deformation of the flange 60 will be eliminated. Therefore, in this state, the spool shaft 54 is rotated by any amount. However, the film 53 cannot run over the rising portion 61 of the flange 60 only by idling.

Therefore, as one of the above measures, both sides of the tip of the film 53 are tapered so that the film 53 can be pushed out without being disturbed by the rising portion 61 of the flange 60. With such a configuration, as the extrusion of the film 53 progresses, the projecting end of the rising portion 61 of the flange 60 that is in contact with the tapered cut portion of the film 53 is gradually widened, and finally,
Deformation occurs up to the full width position of the film 53. When this operation is performed, the flange 60 rotates in synchronization with the rotation of the spool shaft 54.
The deformed position of the flange 60 moves every moment.

As another measure, the amount of winding is regulated so that the film is wound with a certain length left from the end of the film 53.

As a structure for regulating the film winding amount, as shown in FIG. 5, an opening 66 is prepared in a part of the film 53, and the casing 51 of the cartridge main body 50 or the opening 66 is provided in this opening 66. A load is generated by engaging a ratchet-like protrusion 67 provided on the inner wall surface of 52, and the winding operation of the film 53 is stopped by detecting this load, or a side near the tip of the film 53. ∠ on one side or both sides
Prepare a notch 68 and make a notch 68
The film winding operation is completed by dropping the projecting end of the rising portion 61 of the flange 60.

[0028]

According to the photographic roll film cartridge of the present invention, even if the film has a strong curl in the length direction, the leading end of the film is prevented from being wound up to the inside of the flange. The film can be easily taken out, and the above-mentioned problems can be solved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view of the same main part.

FIG. 3 is a sectional view showing another embodiment.

FIG. 4 is an exploded perspective view of a conventional cartridge.

FIG. 5 is an exploded perspective view of the spool shaft as a center.

[Explanation of symbols]

 10-Cartridge 11-Flange 12-Film Inlet / Outlet 13-Spool Shaft 14-Film 15-Notch 16-Notch 17-Uncut Part

Claims (2)

[Claims] 1. A photograph having a structure in which even the leading end of the film is wound inside the cartridge, and having a leading edge floating structure for preventing the leading edge of the film from coming into contact with the back surface of the preceding film in which the leading edge is wound. Roll film cartridge. 2. When the center of the spool shaft is O, the leading end of the film is A, the protruding end of the film entrance and exit of the cartridge is B, and the inner wall surface of the cartridge is C, the center O of the spool shaft is O.
2. The photographic roll film cartridge according to claim 1, wherein the film is wound such that the distance from the film is OB <OA <OC.