JPH02170156A - Photographic film cartridge - Google Patents

Abstract

PURPOSE:To surely and easily draw out a film and to prevent the film from being completely rewound at the time of rewinding by attaching a detaining piece to the front end of the film and providing a recess to fit into the detaining piece to the cartridge. CONSTITUTION:This cartridge 1 consists of a spool 2, the photographic film 3 wound on the spool 2, and the cartridge body 4. The spool 2 is constituted rotatably and the drawing out port 5 of the body 4 is constituted openably and closably. The detaining piece 11 projecting in the thickness direction is attached to the front end of the film 3 and the recess 16 having the shape to fit with the detaining piece 11 is formed near the drawing out port 5 of the body 4. The detaining piece 11 is preferably provided with a projection, hole or recess 15 with which the pawl member for drawing out of the film drawing-out mechanism engages.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a photographic film cartridge.

[Conventional technology]

Conventionally, photographic film used for still photography has been rolled onto a spool and packaged in a cartridge and sold commercially. The cartridge containing the roll film has a film opening, and during use, the film is pulled out in predetermined amounts from this opening.

In the structure of a conventional cartridge, the film outlet is in the form of a slit, and before use, the end of the film is pulled out by a predetermined length from the film outlet to facilitate loading into the camera.

When loading film into the camera in this state, in order to prevent the film inside the cartridge from being exposed to light, a light-shielding material generally called a "teremp material" is attached to the film outlet to maintain a light-tight state inside the cartridge. ing.

However, the provision of this light shielding member has been accompanied by various problems. Poor light density occurs, albeit at a low frequency, and the resistance when pulling out the film is uneven.
The film may be scratched and the production efficiency is low.

Furthermore, in this cartridge, when rewinding the film after shooting into the cartridge, there is no means to prevent excessive rewinding, so the entire film including the leading edge is rewound into the cartridge. In many cases, in order to take out the film during development,
It also had the problem of having to destroy the patrone.

In view of these points, the applicant proposed in Japanese Patent Application No. 63-57785 a photographic film cartridge that does not require a light shielding member. This photographic film cartridge has a film drawer opening that can be opened and closed. Before loading the camera, the entire film, including its leading edge, is stored in the cartridge and the film drawer door is closed. This configuration eliminates the need for a light shielding member. When the cartridge is loaded into the camera, the cartridge's film drawer opening is opened in conjunction with a mechanism on the camera side, and the film is pulled out and guided to the exposure position within the camera. When shooting is completed, the film is wound into the cartridge and the cartridge's film drawer is closed. This type of film cartridge suggests one direction in improving the structure of conventional cartridges, but it does not require a mechanism for opening and closing the film drawer, or a mechanism for opening and closing the film drawer, or a mechanism for moving the film from the opened film drawer. There are many problems that need to be improved in connection with a mechanism for pulling out and guiding the camera to a predetermined position within the camera, how to take it out from the camera after shooting, and how to make it easier to handle during development.

[Problem to be solved by the invention]

The present invention has been made in view of the above-mentioned problems, and it is possible to reliably and easily pull out film from a cartridge when loading it into a camera without requiring a light-shielding material at the film draw-out opening. To provide a photographic film cartridge from which the film inside can be taken out without rewinding the entire film and therefore without destroying the cartridge during development.

[Means to solve the problem]

In order to achieve this object, the photographic film cartridge according to the present invention is configured such that the film outlet of the cartridge can be opened and closed, and a locking piece is provided at the leading end of the film to be locked near the film outlet of the cartridge. . The locking piece protrudes in the thickness direction of the film and is fixed to the leading end of the film. Further, the cartridge is formed with a recess shaped to fit with this locking piece. The locking piece can be provided with a protrusion, a hole, or a recess for engagement with a pull-out claw member of the film pull-out mechanism.

[For production]

According to the above-described structure of the present invention, before photographing, the film is completely drawn into the cartridge and the cartridge opening is closed. In this state, the locking piece at the leading end of the film is fitted into a recess formed near the film outlet of the cartridge. Therefore, the light-tight state inside the cartridge is maintained. When the film is loaded into the camera, the film drawer opening of the cartridge is opened by a mechanism inside the camera, and the film drawer mechanism provided inside the camera engages with a locking piece at the leading end of the film and pulls out the film in the winding direction. After the shooting is completed, the film is rewound into the cartridge and returns to its state before shooting.

〔Example〕

FIGS. 1(a) to 1(C) show one embodiment of a photographic film cartridge according to the present invention. The photographic film cartridge 1 consists of a spool 2, a photographic film 3 wound around the spool 2, and a cartridge main body 4. The cartridge main body 4 includes a box-shaped cartridge body 4a with one side open, and a lid 4 provided on the open side of the cartridge body 4a.
It consists of b.

As shown in FIG. 1C, a cylindrical space is formed inside the cartridge body 4a to accommodate the photographic film 3 wound around the spool 2. The lid 4b is
One edge 4C is connected to the Palone body 4a. Lid 4
b has flexibility, and by bending the lid 11b and moving the other edge 4d to the position of the imaginary line as shown by the arrow in FIG. 1(a) or (C), the cartridge body 4a A film outlet 5 can be formed between the two. The spool 2 is arranged rotatably around an axis within the cartridge body 4a. Locking members 6a are provided at both ends of the edge 4d of the lid 4b, and engaging recesses 6b that engage with the locking members 6a are provided on both sides of the cartridge body 4a. By engaging with the engaging recess 6b of the cartridge body 4a, the drawer opening 5 can be kept closed. When forming the drawer opening 5, after loading the photographic film cartridge 1 into the camera, the engagement between the locking member 6a and the engagement recess 6b is released by an appropriate opening means provided in the camera, and then ,
The same means lifts the edge 4d of the lid 4b in the direction of the arrow while holding the locking member 6a. An example of this opening means is Japanese Patent Application No. 63-5'? No. 785. It is sufficient that the opening of the drawer opening 5 is slightly wider than the thickness of the film, and can be sufficiently obtained by bending the lid 4b. In this case, if the lid 4b is formed in an upwardly bent state and is engaged with the engagement recess 6b of the cartridge body 4a in a flat state by the locking member 6a, the opening means can be engaged with the locking member 6a. Matching recess 6b
The lid 4b is bent upward simply by releasing the engagement with the lid 4b, and the drawer opening 5 is formed, and the opening means does not need to lift the lid 4b upward.

This patrone was filed by the applicant in Japanese Patent Application No. 63-5778.
This is similar to the cartridge shown in issue 5.

The present invention is characterized in that this cartridge is newly fixed with a locking piece at the leading end of the film, and a recessed portion having a shape that fits into this locking piece is formed in the cartridge.

The locking piece of the present invention can also be employed in cartridges having different configurations of the film outlet. For example, a similar locking piece can be used for a cartridge whose always-open drawer opening is shielded from light by a light shielding member or a circular path.

An example of the shape of the locking piece is shown in FIGS. 3(a) and 3(b). The locking piece 11 has protrusions 13a, 13 that protrude in the thickness direction of the photographic film 12 on both sides of the surface of the photographic film 12.
b, and a locking surface 14 that locks with the corresponding surface of the cartridge main body 4.
a, 14b. A recess 15 is provided on the upper surface of the locking piece 11.
will be provided. It is necessary for the locking piece 11 to maintain a light-tight state by fitting into the cartridge main body 4, and if it is deformed, this light-tight state cannot be maintained. Therefore, the locking piece 11 should be made of a hard material that does not deform, such as metal, The material is plastic. The method for fixing the locking piece 11 to the film 12 is as follows:
For example, the locking piece 11 is provided with a protrusion, and the film 12 is provided with a hole that fits into the protrusion, and after both are fitted, the protrusion is melted and the locking piece 11 and film 12 are fitted together. There is a way to fix it. Note that the protrusions only need to be on at least one side of the surface of the film, and do not necessarily need to be on both sides. The recess 15 does not necessarily need to be provided on the top surface, and may be provided on the side surface, for example. Moreover, it is also possible to provide a protrusion instead of a recess.

The cartridge main body 4 is provided with a recess 16 shaped to fit with this locking piece 11, and in a normal state,
The locking piece 11 fits into this recess 16 to maintain a light-tight state inside the cartridge.

This patrone works as follows. The photographic film cartridge 1 is loaded into the camera while maintaining a light-tight state as shown by the solid line in FIG. 1(a). After loading, a suitable opening means (not shown) provided inside the camera is engaged with the engagement member 6a, and the engagement with the engagement recess 6b provided in the cartridge body 4a is released. As shown in FIG. 2, the opening means lifts the lid 4b upward while holding the locking member 6a, and forms the drawer opening 5 by bending the lid 4b upward. A film pull-out claw member 20 is provided inside the camera as a film pull-out mechanism. When the drawer opening 5 is formed, the claw member 20 moves into the recess 1.
5 and pulls out the film 12 from the cartridge main body 4. The claw member 20 guides the film 12 to the exposure position, and after exposure, guides it to the film winding shaft. When the film 12 is to be rewound inside the cartridge after photographing has been completed, the spool is rotated in the winding direction. In this case, the locking surface 14 a, 1 of the locking piece 11 at the tip of the film 12
4b come into contact with the corresponding surfaces 16a and 16b of the recess 16, respectively, so that the rewinding is completed without the entire film 12 being stored inside the cartridge. As mentioned above, since the opening of the drawer opening 5 is slightly wider than the film, the locking surface 14a of the locking piece 11
, 14b are sure to come into contact with the corresponding surfaces 16a, 16b of the recess 16, and the locking piece 11 will not be pulled into the cartridge interior past the drawer opening 5. Thereafter, the opening means that is bending the lid 4b is disengaged from the locking member 6a, and the elastic force of the lid 4b returns the lid 4b from the bent state to the flat state, and the locking member 6a and the engagement recess 6b are engaged with each other. As a result, the lid 4b and the cartridge body 4a are fitted together again. In this way, the light-tight state is maintained again, and the cartridge can be taken out of the camera.

In addition, as shown in FIGS. 4(a) and 4(b), a protrusion 17a is provided on the locking piece 11 in order to improve the light-shielding property inside the cartridge.
, 17b may also be provided. Projecting portions 17a, 1
By providing 7b, the engagement between the locking piece 11 and the cartridge main body 4 is formed in a stepped manner. Therefore, even if there is a gap between the locking piece 11 and the cartridge main body 4 and outside light enters from there, the outside light cannot travel straight, and the locking piece 11 fitted in a stepped manner The light is attenuated while being reflected by the recess 16 and the film is no longer exposed.

〔Effect of the invention〕

With the photographic film cartridge of the present invention, there is no need for a light shielding member at the film drawer opening, and the film can be reliably pulled out from the cartridge loaded in the camera, and even when rewinding the film, all the film can be removed. Unwinding can be prevented. Therefore, even during development, the film inside can be taken out without destroying the cartridge.

[Brief explanation of the drawing]

FIG. 1(a) is a perspective view of an embodiment of the photographic film cartridge according to the present invention, FIG. 1(C) is a partially cutaway perspective view showing the inside of the cartridge of FIG. Figure (a)
FIG. 2 is a schematic diagram showing the state in which the film is pulled out from the cartridge opening, FIG. 3(a) is a plan view showing the shape of the locking piece, and FIG.
b) is a cross-sectional view in the χ-X direction of Fig. 4(a), and Fig. 4(a)
is a plan view showing the shape of another locking piece, and the same figure (b) is the same figure (
It is a sectional view of a) in the xx direction. [Explanation of symbols] 1... Photographic film cartridge 2... Spool 3... Photographic film 4... Patrone body 4a... Patrone body 4b... Lid 4 c, 4 d... Lid edge 5... Drawer opening 6a... Locking member 6b... Engagement recess 11... Locking piece 12... Photographic film 13 a, 13 b... Protrusion 14 a, 14 b... Locking surface 15... Recess 16... Recess 16 a, 16 b... Corresponding surface 17 a, 17 b... ... Projection 20 ... Claw member Figure 3 Figure 4 (a) ■, Indication of the case 2, Title of the invention 3, Person making the amendment Relationship with the case 1988 Patent Application No. 325638 Photo The following passage is inserted after page 12, line 14 of the applicant's specification for film patrone. In addition, in this embodiment, the lid 4b is joined to the cartridge body 4a at one edge 4C, and the lid 4b is bent from that point to form the film drawer opening 5. By combining the lid 4b with the cartridge body 4a at the edge 4c, the lid 4b
It is also possible to form the film drawer opening 5 by configuring it so that it can be opened and closed. ” Fuji Photo Film Co., Ltd. 4, Generation 5, Date of amendment order 6, Detailed explanation of the invention in the specification subject to amendment

Claims (2)

[Claims] (1) Consisting of a spool, a photographic film wound on the spool, and a cartridge main body, the spool is arranged inside the cartridge main body so as to be rotatable around an axis, and the cartridge main body has a mechanism for pulling out the photographic film. In a photographic film cartridge provided with a drawer opening, the drawer opening is configured to be openable and closable, a locking piece protruding in the film thickness direction is fixed to the leading end of the photographic film, and a locking piece is attached to the cartridge main body. A photographic film cartridge characterized in that a recess shaped to fit with the locking piece is formed near the drawer opening. (2) The photographic film cartridge according to claim (1), wherein the locking piece is provided with a projection, a hole, or a recess for engagement with a pull-out claw member of a photographic film pull-out mechanism. .