JPH03237454A - Photographic film cartridge - Google Patents

Abstract

PURPOSE:To enhance the accuracy of positioning by forming part of the outlet of a cartridge for drawing out a film and positioning parts for positioning the cartridge in the cartridge charging chamber of a camera by contact with the inner wall of the chamber as one molded body forming part of the cartridge. CONSTITUTION:Part of the outlet 8 of a cartridge 2 for drawing out a film 3 and positioning parts are molded in one body. When the cartridge 2 is charged into the cartridge chamber 22 of a camera 20 with the outlet 8 toward the center of the camera 20, the first positioning part 13 comes in contact with a first receiving part 23. In this state, a lid 21 is shut. The cartridge 2 is pressed by sponge 28 and slides to the right of the chamber 22 and the second positioning part 14 comes in contact with a second receiving part 24. When the lid 21 is further shut, the cartridge 2 is pressed downward by sponge 27 and the first positioning part 13 comes in further contact with the first receiving part 23. The cartridge 2 is surely positioned in the cartridge chamber 22 and the outlet 8 for drawing out the film 3 is also positioned in front of a film insert hole 26.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a photographic film cartridge containing film.

(Prior Art) A conventional photographic film cartridge containing 1350-le film exposes the league portion of the photographic film from the cartridge body.When loading film into a camera, the film leader portion is inserted into the camera's film. The main body of the cartridge was inserted into the cartridge loading chamber, taking care to ensure that it was set correctly in the passageway.

In addition, recently, as disclosed in U.S. Pat. No. 4,834,306, in order to simplify the loading operation into the camera, the leading end of the film is kept inside the cartridge body even when unused, and the spool is removed. A photographic film cartridge has been proposed in which the leading end of the film can be fed out of the cartridge body by rotating it.

In this kind of photographic film cartridge, the film glue is
It is very convenient because it can be loaded without paying attention to the part, but
It is necessary to make the film drawer opening face the film path of the camera, and the cartridge main body to be loaded must be accurately positioned in the cartridge loading chamber.

In order to correctly position the cartridge main body, as described in Japanese Utility Model Application Publication No. 49-75340 and Japanese Utility Model Application Publication No. 63-184750, a positioning part is provided in a part of the cartridge main body, and this positioning part is A method is known in which the cartridge is brought into contact with a positioning member of the cartridge loading chamber.

[Problem to be Solved by the Invention] However, in the above-mentioned conventional photographic film cartridge, the positioning part is provided in a separate part from the part in which the film drawer opening is formed, so if an assembly error occurs, the film may There is a problem in that the positional relationship between the drawer opening and the positioning portion is misaligned, and the degree of positioning of the cartridge main body with respect to the cartridge loading chamber cannot be increased.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and it is possible to increase the precision with which the cartridge main body is positioned relative to the cartridge loading chamber, and to ensure that the leading edge of the photographic film fed out from the cartridge main body is inserted into the film path of the camera. The purpose is to provide photographic film cartridges.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a part of the film drawer opening and a part of the cartridge loading chamber of the camera in one molded part constituting a part of the cartridge body. A positioning portion that abuts against the inner wall and positions the cartridge main body in the cartridge loading chamber is integrally molded.

[Effect]

According to the above configuration, when the cartridge main body is loaded into the cartridge loading chamber, the positioning portion comes into contact with the inner wall of the cartridge loading chamber, and the film drawer opening is positioned at a predetermined position in the cartridge loading chamber.

[Embodiment] In FIGS. 1 and 2 showing a first embodiment of the film cartridge of the present invention, the cartridge main body 2 is composed of an upper main body 2a and a lower main body 2b, each of which is molded from light-shielding plastic. The upper main body 2a and the lower main body 2b are divided into two parts along the longitudinal direction of the cartridge main body 2. Further, a spool 4 on which a film 3 is wound is rotatably built into the cartridge main body 2. A pair of ring-shaped ribs 5 are provided on the inner circumference of the cartridge body 2, and the ribs 5 abut against the outer circumferential surface of the film 3.
Prevents winding from loosening. Therefore, when the spool 4 is rotated in the feeding direction (clockwise) of the film 3, the film 3 is rotated clockwise without being unwound.

Then, the leading end of the film 3 is peeled off from the outer peripheral surface of the film 3 by a separating claw 6 formed on the rib 5, passes through a film guide path 7, and is sent out of the cartridge main body 2 from a film outlet 8. A well-known telescope 9 is attached to the film outlet 8, and this telescope 9 blocks external light from the film outlet 8.

A plate-shaped tongue piece 12 is integrally formed on the sectioned surface of the upper body 2a, excluding the part of the drawer opening 8, and this tongue piece 12 is fitted into the lower body 2b and is connected to the upper body 2a. It is coupled to the lower main body 2b and the coupled portion is shielded from light. In addition to bonding using an adhesive, a part of the main body may be melted and welded using ultrasonic waves or dielectric heating. If such a method is used, the bond will be strong and light shielding will be improved. The outer surface of the lower main body 2b is flat at two places, and these flat surfaces are at the first and second places, which contact the inner wall of the cartridge chamber of the camera, which will be described later. Second positioning part 13.
It will be 14.

The first positioning portion 13 is formed on the bottom surface of the lower main body 11. On the other hand, the second positioning part 14 is formed perpendicularly to the first positioning part 13 on the side surface of the lower main body 2b. In addition, in this embodiment, the cartridge main body 2 is
Although it is constructed from two parts, the lower bodies 2a and 2b, it can also be constructed from a cylindrical main body and a cap fitted to this main body, like a conventional cartridge main body. At this time, the film outlet and the two positioning parts are integrally molded on the cylindrical main body.

In addition, partial openings 15 and 16 are provided in the upper and lower parts 2a and 2b.
are formed respectively, and these are the upper and lower main bodies 2.
When a and 2b are coupled, the bearing, which has an inner diameter approximately equal to the outer diameter of the spool 4, serves as a part to rotatably support the end of the spool 4.

Note that both ends of the spool 4 are formed short without protruding outside the outline of the cartridge main body 2, so that the user cannot easily rotate the spool 4 with his fingers or the like.

Furthermore, as shown in FIG. 3, if the film cartridge is provided with a locking mechanism that temporarily stops the rotation of the spool 4, the rotation of the spool 4 can be prevented while the film cartridge is being transferred, and excessive loosening of the winding can be prevented. be able to. This locking mechanism has a notch 4a formed on the outer peripheral surface of the spool 4.
and a lock pawl 11a slidably provided on the lower body 11, and the lock pawl 11a is fitted into the notch 4a at the time of shipment from the factory.

A pair of flanges 17, 18 are formed on this spool 4, and these flanges 17, 18 align the end faces of the film 3 and block external light from the partial openings 15.degree. 16.

FIG. 4 shows a camera that uses the above film cartridge. An L-shaped loading lid 21 is attached to the left side of the camera body 20 so that it can be opened and closed. When the loading lid 21 is opened, the cartridge can be opened. Chamber 22 is exposed. On the inner wall of this patrone chamber 22, there is a first. The second receiver is part 23.24
is formed, and this first. The second receiver portions 23 and 24 abut against the first and second positioning portions 13 and 14, respectively, to position the cartridge main body 2 to be loaded in the cartridge chamber 22. A drawer holder 25 for holding the film drawer opening 8 is formed above the second holder 24 . The drawer opening holder has a film insertion opening 26 formed in the portion 25 into which the film 3 sent out from the cartridge main body 2 is inserted. A sponge 2 is attached to the loading lid 21.
7.28 are attached and these sponges 27.
28 is the cartridge main body 2 when the loading lid is closed.
First. The second receiver presses in the direction of portions 23 and 24. This sponge may be a light-shielding sponge that frames the frame of a window for reading information such as the type of film displayed on the surface of the cartridge from outside the camera.

A photographing lens 30 is located at the center of the front surface of the camera body 20.
is installed. An exposure frame 31 is formed in front and behind the photographic lens 30, and a pair of film guides 32 are provided in the exposure frame 31 along the feeding direction of the film 3.
is formed. This film guide 32 forms a film feeding path 26a continuous to the film insertion opening 26. Further, a well-known pressure plate 33 biased by a spring 34 is in contact with the film guide 32 from the rear. A rotatable sprocket 35 is installed between the cartridge chamber 22 and the exposure frame 31 to detect the amount of film feeding. This sprocket 35 utilizes a perforation at the leading end of the film to open the film winding chamber 3 which will be described later.
It may be a drive sprocket that feeds into 7.

A film winding chamber 37 is formed on the right side of the exposure frame 31, and a winding shaft 38 is provided at the center thereof. A rotatable guide plate 40 is attached above the film winding chamber 37, and this guide plate 40 is attached to the spring 3.
9 in the clockwise direction, and the film feeding path 2
The leading end of the film 3 sent out from the winding shaft 38
Guide to. Therefore, the film 3 is wound around the winding shaft 38.

The operation of the film cartridge of the present invention constructed as described above will be explained. When the loading M21 is opened and the cartridge main body 2 is inserted into the cartridge chamber 22 with the film drawer opening 8 facing the center side of the camera main body 20, the first positioning part 1
The first receiver 3 contacts the part 23. In this state, the loading lid 21
When the cartridge is closed, the cartridge main body 2 is pressed by the sponge 28 and slides to the right side of the cartridge chamber 22, and the second positioning part 14 comes into contact with the second receiver part 24. Further loading M2
1 is closed, the cartridge main body 2 is pressed downward by the sponge 27, and the first positioning part 13 and the first receiver are connected to the part 23.
comes into contact with. In this way, the cartridge main body 2 is positioned in the cartridge chamber 22, and the film drawer opening 8 is also positioned in relation to the film insertion opening 26.

When the loading M21 is closed and locked in the closed position, the spool 4 and the winding shaft 38 are rotated clockwise by the camera mechanism. Then, as the spool 4 rotates, the leading edge of the film 3 is sent out of the cartridge main body 2 through the film drawer opening 8, and the leading edge of the film 3 is sent out from the film insertion opening 26. The film is sent to the film winding chamber 37 via the film feeding path 26a.

Further, when the spool 4 is rotated, the leading end of the film 3 is guided by the guide plate 40, reaches the winding shaft 38 which is rotating clockwise, and is wound thereon. After this, the film 3 is wound up by the winding shaft 38. In this way, the feed amount of the film 3 supplied from the cartridge main body 2 is detected by the sprocket 35 which is rotated by engaging with the bar foreboard. In the case of a driving sprocket, it is free to rotate due to a flanch or the like, making it possible to detect the amount of perforation. When the film has been wound a certain amount, the rotation of the winding shaft 380 is stopped, the first frame is set in the exposure frame 31, and preparation for photographing is completed.

Thereafter, when the release button is pressed and the shank blade opens and closes, the subject image formed by the photographing lens 30 is exposed to the first frame of the film 3.

When a predetermined number of images have been taken in this manner, the spool 4 is rotated counterclockwise by the mechanism of the camera, and the film 3 is wound into the cartridge main body 2.

After this winding is completed, the loading M3I is opened and the cartridge main body 2 is taken out from the cartridge chamber 22.

FIG. 5 shows a second embodiment of the film cartridge of the present invention. This Itrow 2 main body 45 consists of an upper part and a lower part 46, 47, and a part of the film outlet 8 is formed in the lower part 47. In addition, the lower body 47
A recess for positioning, for example, a free notch, is formed on both end faces of each.

FIG. 6 shows a camera loaded with the film cartridge shown in FIG. 4, and a mount M21 is attached to the left front end of the camera body 50 so as to be openable and closable. When this mounting bXM21 is opened, the cartridge chamber 51 is exposed. A protrusion 52 is formed on the inner wall of the patrone chamber 51 and has one side parallel to the optical axis 30a of the photographic lens 30 and one side perpendicular to the negative side. This protrusion 52 fits into the notch 48 of the cartridge main body 45 inserted into the cartridge chamber 51 to position the film drawer opening 8 with respect to the film insertion opening 26.

FIG. 7 shows a third embodiment of the film cartridge of the present invention, and this cartridge main body 55 consists of an upper main body and a lower main body 56 and 57. In place of the notch 48 of the second embodiment, the lower body 57 is provided with a protrusion, for example, a protrusion 58 in the form of a white letter, and this protrusion 58 is used for positioning.

FIG. 8 shows a camera into which the film cartridge is loaded from the rear. A loading lid 61 that can be opened and closed is attached to the left rear end of the camera body 60. A sponge 62 is attached to the inside of this loading lid 61. A cartridge chamber 63 is formed below the loading lid 61, and this cartridge chamber 63 is connected to the cartridge main body 55.
The length is approximately the same as the outer diameter of the Patrone room 6
A pair of support protrusions 64 are formed on the inner wall of 3 so as to sandwich the end face of the cartridge main body 55 to be inserted. Each of the pair of support protrusions 64 is formed with a notch 65 into which a portion of the protrusion 58 is fitted.

When loading the cartridge main body 55 into the cartridge chamber 63, the loading 161 is opened and the cartridge main body 55 is inserted from the rear of the camera main body 60. When inserting this,
When the film is inserted with the film drawer opening 8 facing toward the center of the camera body 60, the insertion direction is regulated by the inner wall of the cartridge chamber 63, and the protrusion 58 is fitted into the notch 65. After this,
When the loading lid 61 is closed, the cartridge main body 55 is pressed by the sponge 62 and positioned in the cartridge chamber 63, and the film drawer opening 8 is also positioned in the film insertion opening 26.

FIG. 9 shows a camera in which the cartridge main body is loaded from the side. A loading lid 71 that can be opened and closed is attached to the side surface of the camera body 70. A sponge 72 is attached to the inside of this loading lid 71. Mounting @ lid 7
A cartridge chamber 13 is formed on the right side of the cartridge chamber 1, and above the cartridge chamber 73 there is a bar that presses the cartridge main body 55 inserted downward. , 74 are attached.

Further, a pair of support protrusions 75 are provided on the inner wall of the cartridge chamber 73 so as to sandwich the end surface of the cartridge main body 55 to be inserted.
is formed. This pair of support protrusions 75 have i7I
A notch 76 into which a part of the protrusion 58 is fitted is formed.

When loading the cartridge main body 55 into the cartridge chamber 73, the loading M71 is opened, and the cartridge main body 55 is inserted from the side of the camera main body 70 with the film drawer opening 8 facing the center of the camera main body 70. The insertion direction of the cartridge main body 2 is restricted by a spring 74, and the protrusion 58 is fitted into the notch 65. After that, when the loading lid 61 is closed, the cartridge main body 55 is pressed by the sponge 62,
Positioning is performed within the cartridge chamber 63, and the film drawer opening 8 is also positioned relative to the film insertion opening 26.

In each of the above embodiments, a part of the film outlet 8 is formed in the lower body on which the positioning part is formed, but the same effect can be obtained even if the entire film outlet 8 is formed in the lower body. I can do it. Further, positioning may be performed using a positioning portion such as a protrusion or notch alone or in cooperation with a flat surface of the main body as in the first embodiment.

[Effects of the Invention] Second, as described in detail, in the present invention, one molded part constituting a part of the cartridge body is provided with a part of the film drawer opening for feeding photographic film from the cartridge body to the outside. Since the positioning part for positioning the cartridge main body in the cartridge loading chamber by coming into contact with the inner wall of the cartridge loading chamber of the camera is integrally formed, the positional relationship between the guide part and the positioning part does not shift. Therefore, in the photographic film cartridge of the present invention, by bringing the positioning portion into contact with the positioning member of the cartridge 4° loading chamber, the cartridge main body can be reliably positioned at a predetermined position in the cartridge loading chamber.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a first embodiment of the film cartridge of the present invention. FIG. 2 is a partially cutaway front view of the film cartridge shown in FIG. 1. FIG. 3 is a perspective view showing the locking mechanism attached to the first embodiment. FIG. 4 is a sectional view of the camera loaded with the film cartridge shown in FIG. 1. FIG. 5 is a perspective view showing a second embodiment of the film cartridge of the present invention. FIG. 6 is a sectional view of the camera loaded with the film cartridge shown in FIG. 5. FIG. 7 is a perspective view showing a third embodiment of the film cartridge of the present invention. 8 and 9 are cross-sectional views of the camera loaded with the film cartridge shown in FIG. 7. 4.5.55...Patrone body/film spool/film drawer opening O...upper body 1...lower body 3...first positioning part 4...second positioning part 0.50. 70...Camera 2.51.73...Patrone chamber 3...The first support is part 4...The second support is part 6...Film insertion slot 2.64.75...Support protrusion 8...Protrusion 5.76...Notch. Figure 1 Figure 3 (Film) Figure Figure Figure Figure Figure

Claims (1)

[Claims] (1) It consists of a spool around which the film is wound, and a cartridge main body that rotatably houses the spool and stores up to the tip of the film, which is a combination of two or more parts. In the photographic film cartridge, in which at least one of the parts is made of a molded product, and at least a part of the discharge port and the camera cartridge are sent out from the cartridge body through an outlet formed in the cartridge body, at least one of the parts is formed of a molded product. A photographic film cartridge characterized in that a positioning part for positioning the cartridge main body by contacting a positioning member in a loading chamber is integrally molded.