JPH0640949U - Patrone for roll film for photography - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention reveals a photographic roll film cartridge that can provide a camera with an empty space for arranging members and elements for a new mechanism. The purpose is to do. [Structure] In a film roll film cartridge for wrapping a film around a spool shaft and maintaining it in a light-tight state by a casing, a synthetic resin spool shaft molded as a single member including a hub portion has an end portion. It is characterized in that it is disposed so as not to substantially project from the end of the casing, and that an attachment member corresponding to the long hub in the conventional cartridge is detachably attached to the end of the spool shaft.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a photographic roll film cartridge that can provide a camera with an empty space for arranging members and elements for a new mechanism.

[0002]

[Background of device]

 The 35 mm photographic roll film that is widely used at present is stored in a light-shielding container called a patrone, and is a long film with continuous through holes called perforations on both sides. The film is wound with its base end fixed to a spool shaft in the cartridge, and the leader is pulled out to the outside through a slit in which a light-shielding fiber material called a so-called “teremp” is arranged.

In order to take a photograph using the above film with a cartridge, first open the back cover of the camera and fit the cartridge into a predetermined position, and then set the reader perforation to the spool shaft rocket gear on the camera side. It is necessary to fix the tip of the leader part to the take-up shaft firmly after engaging with, and close the back cover and then perform several idling shots.

As the shooting progresses, the film that has been shot is taken up by the take-up shaft of the camera, and when the entire shooting is completed, the rewind lever or knob of the camera is rotated to rewind the film into the cartridge. The returning operation is performed.

If the camera has an automatic film rewinding mechanism, film setting, loading, and rewinding can be performed by simpler operations.

In the conventional JIS135 film patrone described above, a long hub and a short hub are connected to both ends of the spool shaft, and the long hub is engaged with a circular recess provided at the camera patrone storage position. Together, a type of bearing or stopper structure is formed, while the end of the short hub is positioned to engage the film rewind drive shaft of the camera.

[0007]

[Problems to be solved by the device]

 In recent years, as the functionality of cameras has advanced, a large number of members and elements are packed in the internal space, whether it is a single-lens reflex camera or a compact camera, and the mechanical function for the new function is added.・ There is no space to store electrical elements. On the other hand, there is an increasing demand for miniaturization of cameras, and the current situation is that there is a trade-off between wanting to accommodate new members and elements / more compactness.

Therefore, the inventor of the present invention arrived at the present invention by paying attention to a patrone that stores a film in a light-tight state. That is, the structure of the long hub and the short hub in the conventional Patrone is only the result of being constrained by the so-called 135 format (ANSI PH1.14-1990), and it is said that the perforation was diverted from a movie film. Just as he followed the history of camera films, he focused on the fact that it was not necessarily a structurally indispensable element, and wondered if an empty space could be created in this part of the camera.

As can be seen from the above, the present invention is intended to reveal a photographic roll film cartridge that can provide a new empty space for a camera.

[0010]

[Means for Solving the Problems]

 A photographic roll film cartridge according to the present invention is formed as a single member including a hub portion in a photographic roll film cartridge in which a film is wound around a spool shaft and is kept in a light-tight state by a casing. The spool shaft made of synthetic resin is arranged so that its end does not substantially project from the end of the casing, and the attachment member corresponding to the long hub of the JIS135 film cartridge is removable from the end of the spool shaft. Each is characterized by being attached.

[0011]

[Specific configuration of device]

 Next, the patrone of the photographic roll film according to the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 1, the cartridge 10 of the photographic roll film according to the present invention is a casing formed of a metal steel plate such as tin-free steel or tin plate or a synthetic resin material such as polystyrene, ABS or polyethylene. 11 and a spool shaft 12 made of synthetic resin, which is axially fixed to both ends of the casing 11 in a light-tight state. The film 13 is pulled out and rewound through a slit provided in the casing 11.

In the conventional cartridge, a long hub and a short hub are connected to both ends of the spool shaft 12, respectively, and both ends of the casing 11 have a light-tight bearing structure. Is about 5 mm, and is projected from the end of the casing 11.

On the other hand, in the cartridge according to the present invention, a separate member, a hub, does not exist, and the ends of the spool shaft 12 directly engage with both ends of the casing 11 in a light-tight state, At least one of the end portions is exposed at the end portion of the casing 11 for engaging with a film rewinding drive shaft of the camera. However, neither end is formed so as to project from the line connecting the outermost ends of the casing 11. That is, as shown in FIG. 3, when the casing 11 is formed of a metal plate, a slight rising state portion is formed at the edge of the cap for fixing both ends of the casing 11, but the end of the spool shaft 12 is not formed. The part is in a substantially non-protruding state in which it does not protrude beyond the height of the rising state part.

The cartridge of the present invention can be vertically inserted into a camera-side cartridge housing (recess) formed corresponding to the length of the casing 11, and in the conventional cartridge, a long hub Compared with the case in which the so-called play is formed due to the length of the cartridge housing being longer than the protrusion, the camera has an empty space corresponding to the play of the cartridge housing and the circular recess to which the long hub engages.

Further, by using a thin film as the base film of the roll film, the film winding diameter can be reduced, and it is possible to reduce the casing diameter of the conventional cartridge from 25 mm to about 20 mm. This is possible, and by combining it with the structure without a long hub described above, a larger empty space can be obtained on the camera side.

When the patrone according to the present invention described above is set in a camera using a conventional type patrone, a gap is formed only in the play portion of the patrone housing required for engaging the long hub of the conventional patrone. In addition, since there is no axial support by the end of the long hub, the cartridge may tilt in the cartridge housing, and the film drawing direction may meander. As measures against this, a method of fitting a spacer that fills a gap caused by a difference from a conventional cartridge to the camera-side cartridge housing, and an attachment equivalent to a conventional long hub at the end of the spool shaft 12 are used. There is a method of detachably joining members. In the latter method, the attachment member may be attached to the spool shaft at the time of selling the film, or may be attached so that the user can attach it.

In the attachment of the conventional patrone, the long hub portion has a function of positioning the patrone in a state where the patrone is set in the camera, so that the patrone according to the present invention is attached. It is effective when setting to a conventional type camera.

The above measures are also effective when the cartridge according to the present invention is set in the automatic developing machine, or when the automatic developing machine operates the mechanism for detecting the film end and cutting the film. .

It should be noted that various methods such as press-fitting, springs, and screws can be employed as a specific configuration for detachably joining the attachment member to the end of the spool shaft 12, and are not limiting elements. An example thereof is shown in FIG. 2, and these examples have a structure in which the end portion of the attachment 14 is inserted into the recess formed in the end portion of the hub.

[0021]

[Effect of device]

 According to the patrone according to the present invention, by eliminating the long hub structure which the conventional patrone has traditionally left, it is possible to provide an empty space on the camera side for incorporating members and elements of a new mechanism. You will be able to solve the problems mentioned above.

Further, by preparing an attachment member, it can be used in a camera that uses a conventional type cartridge, so that it is practical to implement.

[Brief description of drawings]

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

FIG. 2 is a front view showing an example of an attachment.

FIG. 3 is a perspective view showing an embodiment of the present invention.

[Explanation of symbols]

 10-Patrone 11-Casing 12-Spool Shaft 13-Film 14-Attachment

Claims (2)

[Scope of utility model registration request] 1. A photographic roll film patrone in which a film is wound around a spool shaft and kept in a light-tight state by a casing, and a synthetic resin spool shaft molded as a single member including a hub portion has an end thereof. A patrolle for a photographic roll film, characterized in that the portion is arranged so as not to substantially project from the end of the casing. 2. An attachment member corresponding to a long hub in a JIS135 film cartridge is detachably attached to the end of the spool shaft.
A photographic roll film cartridge described in.