JPH02201355A - Cartridge for film - Google Patents

Abstract

PURPOSE:To obtain the cartridge which is easily handled when not used and loaded in a camera by storing the roll film in a container main body so that the film leader part does not project from a lead-out slit when not used, and exposing the film leader part partially. CONSTITUTION:A container 16 which contains the film 12 is molded cylindrically out of plastic and a port part 22 for leading the film 12 out is extended to part of the container. Further, cuts 26 and 28 for exposing perforations 24 for the film 12 are formed at both ends of the port part 22. The film 12 stored in this container 16 is stored so that the leader does not project out from the tip of the port part 22; and a projection part 30 which is thicker than the gap of the port 22 is formed atop so that the leader of the film 12 does not enter the container 16 from the port part 22. Consequently, the handling of the film when the film is loaded in the camera is facilitated not to mention the handling when the film is not used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present application relates to a novel film cartridge for storing photographic film and a camera using this cartridge.

[Conventional technology]

Photographic film cartridges standardized by JIS K7528, which are currently widely used, store the film in a roll inside a cylindrical cartridge, and the film is inserted through a port formed in a part of the outer periphery in advance. Tip (
Part of the leader) can be pulled out to a certain length.

When loading such a film cartridge 1 into a camera, the back cover of the camera body is opened and the leading end of the film is inserted into a predetermined position.

[Problem to be solved by the invention]

However, if a portion of the film leader is pulled out from the cartridge in advance, it is troublesome to handle when not in use, and it is also troublesome to load the film into the camera. In particular, people who were not used to using cameras were often confused about how to handle this part of the reader.

Also, when loading such a film cartridge into a camera equipped with an auto-loading mechanism, if the length of the film leader part that is pulled out in advance is not constant, the film may not be able to advance. This required complicated operations such as adjusting the drawer length.

[Purpose of the invention]

The present invention has been made in view of the above problems, and an object of the present invention is to provide a film cartridge that is easy to handle when not in use and easy to load into a camera.

[Means to solve the problem]

In order to achieve the above object, the film cartridge according to the present invention stores the roll film in the container body so that the leading end of the film does not protrude from the drawer opening when not in use, and also stores the roll film in the vicinity of the drawer opening of the container body. A notch is formed in the film to partially expose the leading end of the film.

[Effect]

In the film cartridge according to the present invention, since the leading end of the film does not protrude outside, the cartridge can be handled like a cassette, and handling when not in use is extremely easy. Furthermore, since a notch is formed near the roll film drawer opening, there is no problem when drawing out the stored film.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the structure of a film cartridge according to this embodiment. This film cartridge 10 is
A container 16 for storing an unexposed film 12 wound into a roll in a light-shielded state is covered with caps 1B and 20 from above and below.

Note that the reference numeral 14 indicates a film reel.

Although the film 12 has been slightly modified as will be described in detail later, it basically has a format standardized by JISK7519.

A container 16 for storing the film 12 is formed into a cylindrical shape by plastic molding, and a boat part 22 for guiding the film 12 protrudes from a part thereof. Furthermore, cutouts 26 are provided at both ends of the boat portion 22 to expose the perforations 24 of the film 12.
．． 28 is formed. On the other hand, it is preferable that a positioning protrusion 38 be implanted in a portion of the cap 18 that is fitted into the end of the container 16 to keep the film cartridge 10 in a constant position when it is loaded into a camera.

The film 12 stored in such a container 16 is stored so that the tip does not protrude outside from the tip of the boat section 22, and the tip of the film 12 is placed in the boat section 22.
It is preferable to form a convex portion 30 at the tip that is thicker than the gap between the boat portions 22 so as not to enter the inside of the container 16 from the inside.

In addition, a spool 32 is located at a slightly rear center of this convex portion 30.
A retaining hole 36 is formed to engage with an engaging claw 34 provided on the outer periphery of the retaining hole 36 .

In addition, perforations 24 for initial feeding are formed on the film 12 for a predetermined length from the leading edge of the film, and the perforation pitch is smaller than the conventional perforation pitch, and after that, perforations are formed at the conventional pitch. By forming the small-pitch perforations 24 on the front end side of the film 12 in this way, the engagement between the feed dog 42 and the perforations 24 can be ensured without making the notches 26 thicker. .

Since the pitch of the feed teeth 42 is small, it is preferable to retract the sprocket 40 after the initial feed is performed and a portion of the film leader is wound onto a take-up spool that rotates at a higher linear velocity. . Note that the size of the perforation pitch may be in accordance with the standard of conventional films.

Next, the configuration of a camera using the film cartridge 10 described above will be described. FIG. 2 shows the configuration of a camera using the film cartridge 10, with a portion cut away.

In the figure, a photographing lens 46 is disposed at the center of the front surface of a camera body 45, and a grip 47 that is gripped by a user when photographing is integrally formed on the left side of the photographing lens 46.

Further, a shutter button 48 is provided on the upper surface of the grip 47, and a distance measuring window 4 for AF is provided on the upper left side of the photographing lens 46.
A finder window 50 is provided on the right side of 9.

Inside the main body 45, a photographing mechanism such as an aperture and a shutter (not shown) is provided, and at the right end there is a cartridge loading chamber 52 for loading the film cartridge 10.
is formed. And the side to cover this! ! 5
3 is rotatably provided on the back plate 54. This side ll
53 is raised near the center of rotation, thereby forming a cam surface 53a.

On the other hand, a guide groove 56 is formed in the bottom 55 of the cartridge loading chamber 52 for guiding the end of the film reel 14 when loading the film cartridge 10.

Furthermore, a positioning lever 57 that determines the attitude of the loaded cartridge 10 is arranged at the upper part of the cartridge loading chamber 52. The positioning lever 57 is formed of a thin metal plate bent as shown in the figure, and is rotatably supported by a shaft 58 implanted in the upper surface of the cartridge loading chamber 52. A spring 79 is connected to a part of this positioning lever 57, and biases the lever 57 in the counterclockwise direction. Further, a driven pin 60 is implanted at the end of the positioning lever 57, and this pin 60 is always in contact with the cam surface 53a of the side lid 53.

Next, a third explanation will be given of the operation and effect of loading the film cartridge 10 into the camera configured as above.
This will be explained with reference to the figures. FIG. 3 shows the loading chamber 52 of the camera body 45 viewed from above.

Before the film cartridge 10 is loaded into the camera, the convex portion 30 at the tip of the stored film 12 is in contact with the tip L7 of the boat portion 22, as shown by the solid line in FIG.

When loading the film cartridge 10, first open the side cover 53 and insert the film cartridge 10 into the boat section 22.
Insert it into the loading chamber 52 along the guide groove 56 from that direction. When the film cartridge 10 enters the loading chamber 52,
Positioning protrusion 3 implanted on the top surface of the cartridge 10
8 comes into contact with a part of the inside of the positioning lever 57, and the spring 5
The force of 9 keeps the boat portion 22 facing outward as shown in FIG. 3(A).

Next, when the side lid 53 is closed, the cam surface 53a of the side M53 pushes the driven pin 60 of the positioning lever 57 forward. When the driven pin 60 is pushed forward, the positioning lever 57 rotates clockwise about the shaft 58 against the force of the spring 59, pushing the positioning protrusion 38 of the film cartridge 10 forward to the left.

When the positioning protrusion 38 is pushed forward, the film cartridge 10 rotates counterclockwise around the film reel 14 so that the boat portion 22 faces to the right as shown in FIG. The perforation 24 of the film engages the feed dog 42 .

Thereafter, the sprocket 40 is rotated counterclockwise to initially feed the film 12. When the film 12 reaches the spool 32, the engagement hole 36 formed at the tip of the film 12 engages with the engagement claw of the spool 32, and from then on, the rotation of the spool 32 causes one frame to be captured each time a photograph is taken. It is wound around the outer circumference of the spool 32 minute by minute. Further, at this time, it is possible to detect whether the film is advanced by one frame by counting the number of passing perforations using a photo sensor (not shown). Also, as is known, the perforations 24 may be engaged instead of the holes 36.

As explained above, according to the film cartridge 10 according to the present embodiment, since the leading end of the film 12 does not protrude from the boat part, there is an advantage that it is easy to handle when not in use and when loading into a camera. . Moreover, if this is used in the above-mentioned camera, loading efficiency will be further improved.

Next, a modification of the film cartridge according to the present invention will be described.

The film cartridge shown in FIG. 4 does not use the sprocket shown in FIG.
The engaging claw 72 is engaged with the perforation 66 of the film 65 to be wound onto the spool 70, and is 4°.Therefore, compared to FIG. 1, a notch is provided in the port portion 76. There is a need. In addition, the belts may be configured as a pair of belts on both sides instead of being engaged in the center of the film.

Alternatively, as shown in FIG. 5, perforations 66 formed in the film 65 may be used to engage the belt.

The present invention is not limited to the embodiments described above, and as another means for drawing out the film in the cartridge, the leading end of the film may be nipped by a nip roller and the film may be sent out.

〔Effect of the invention〕

In the present invention, the leading edge of the film does not protrude outside, and only a portion of the leading edge of the film is exposed, making it extremely easy to handle not only when not in use but also when loading into a camera. It has the effect of becoming.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of a film cartridge according to the present invention. FIG. 2 is a perspective view (partially) showing the configuration of a camera using the film cartridge according to the embodiment. FIG. 3 is an explanatory view for explaining the operation of the embodiment. FIG. 5 is a perspective view showing the configuration of a third embodiment of the present invention. 10 ・ ・ 12 ・ ・ 16 ・ ・ 22 ・ ・ 24 ・ 26, 2 30 ・ ・ 36 ・ ・ 40 ・ ・ 42 ・ ・ ・ Film cartridge, film, container, port section, perforation 8... cutout, protrusion Part/Engagement hole/Sprocket/Feed dog 71.78...Belt 72...Engagement claw 77...Notch. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. CB) 1υ

Claims (1)

[Claims] (1) The roll film is stored in such a way that the leading edge of the film does not protrude from the drawer opening when not in use, and a notch is formed near the drawer opening to partially expose the leading edge of the film. A film cartridge comprising a container body.