JPH09319033A - Photographic film cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cartridge constituted so that the fluctuation of force required for drawing out a photographic film from a cartridge case and the fluctuation of the drawing-out speed of the film can be eliminated, the constitution thereof is simple and the fixing release work and the fixing work of the end part of the photographic film with respect to a cartridge shaft is facilitated. SOLUTION: The cartridge is provided with the cartridge shaft 22 having a film insertion port 34a in which the end part of the photographic film is inserted and a catch 34b engaged with the lock hole of the end part inserted in the port 34a and the cartridge case freely rotatably housing the shaft 22. The catch 34b projects in a direction that it is near to the rotation center 22a of the shaft 22 at the inside surface part of the port 34a positioned at the outside circumferential surface side of the shaft 22. Besides, the end part of the photographic film is held by the catch 34b so as to be near to the inside surface part of the port 34a positioned at the outside circumferential surface side of the shaft 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to: a film insertion opening into which the end portion of a photographic film having a locking hole formed at the end portion is inserted, and a photograph disposed in the film insertion opening and inserted into the film insertion opening. A cartridge shaft having a locking claw that engages with a locking hole at the end of the film; a cartridge case that rotatably accommodates the cartridge shaft;
Is related to a photographic film cartridge equipped with.

[0002]

2. Description of the Related Art A photographic film cartridge of the type described above is already known, and not to mention a photographic film cartridge using a conventional 35 mm film,
It is also used in a new standard photographic film cartridge called APS.

[0003]

In these known photographic film cartridges, for example, Japanese Patent Application Laid-Open No. 4-2 / 1992 is used.
Japanese Unexamined Patent Publication No. 6-56187, which describes a conventional example described in Japanese Patent No. 48546 and a photographic film cartridge of the above new standard.
As known from No. 266054, a slit-shaped film insertion opening is formed along the rotation center line of the cartridge shaft. Then, in the film insertion opening, the photographic film having the locking hole at the terminal end engaged with the locking claw at a position close to the rotation center line is guided out of the film insertion opening onto the outer peripheral surface of the cartridge shaft. When the winding on the outer peripheral surface is started, the photographic film is bent to 90 degrees or less. In the photographic film, a strong elastic force is generated at the bent portion in the direction of restoring the fold. This elastic force is suppressed by the frictional force generated between the many winding layers of the photographic film wound when the number of times the photographic film is wound on the outer peripheral surface of the cartridge shaft is large. However, when the number of windings is small, or when the number of windings is small due to the use of a photographic film, the portion corresponding to the bent portion in each winding layer of the photographic film is formed by the elastic force of the cartridge shaft. It is inflated radially outward. When the bulging portion of the outermost winding layer of the photographic film comes into contact with the inner peripheral surface of the cartridge case, the force required to pull out the photographic film from the cartridge case becomes large and the drawing speed of the photographic film varies.

This causes an increase in the size of the motor used for pulling out the photographic film in the camera using the photographic film cartridge described above, and increases the power consumption of the motor.

Even if the bulging portion of the outermost winding layer of the photographic film does not contact the inner peripheral surface of the cartridge case, each winding layer of the photographic film wound with the bulging portion on the cartridge shaft is Since it is eccentric from the center of rotation of the cartridge shaft, at least the drawing speed of the photographic film varies.

In a photographic film cartridge of a new standard called APS, a magnetic information recording band is provided along one side of the photographic film used, and various photographing information is called APS in the magnetic information recording band. Since it is input from the camera side that uses a new standard photographic film cartridge, it is important that various kinds of photographic information are easily recorded in the magnetic information recording band if the drawing speed of the photographic film changes as described above. It becomes a problem.

In Japanese Patent Laid-Open No. 4-248546, a photographic film is bent at 90 degrees or less when it is led out from the inside of the film insertion opening of the cartridge shaft to the outer peripheral surface of the cartridge shaft and the winding on the outer peripheral surface is started. Various configurations for preventing the occurrence of the above are disclosed. In these various configurations, the cartridge shaft is composed of an outer cylinder and an inner cylinder that are detachable from each other along the rotation center line of the cartridge shaft, and the inside of the slit-shaped film insertion opening formed in the outer cylinder of the cartridge shaft. The end portion of the photographic film inserted in the cartridge is fixed to the cartridge shaft by the frictional force between the inner cylinder and the outer cylinder and the locking claw formed on the inner cylinder. The photographic film led out from the slit-shaped film insertion port to the outer peripheral surface of the cartridge shaft (that is, the outer peripheral surface of the outer cylinder) is substantially along the outer peripheral surface.

The cartridge shaft of Japanese Patent Laid-Open No. 4-248546 is composed of an outer cylinder and an inner cylinder, so that the structure is complicated. In addition, the outer cylinder and the inner cylinder of the cartridge shaft must be separated or rotated from each other each time the end of the photographic film is fixed and released from the cartridge shaft, and the fixing and releasing operations are complicated. It is necessary to take out the cartridge shaft from the cartridge case. In a new standard photographic film cartridge called APS, the photographic film separated from the cartridge shaft at the time of development is returned to the customer in a state where the end portion is fixed to the cartridge shaft again after development and stored in a cartridge case. Therefore, the work of separating (fixing) the end of the photographic film from the cartridge shaft and fixing the end of the photographic film to the cartridge shaft is complicated, and the cartridge shaft of JP-A-4-248546 has a new standard called APS. Not suitable for use with photographic film cartridges.

The present invention has been made based on the above circumstances, and an object of the present invention is to eliminate the fluctuation of the force necessary for drawing the photographic film out of the cartridge case and the fluctuation of the drawing speed, and to simplify the structure. (EN) Provided is a photographic film cartridge which can easily release and fix the end portion of the photographic film to the cartridge shaft.

[0010]

In order to achieve the above-mentioned object of the present invention, a first photographic film cartridge according to the present invention is: a photographic film end having a locking hole formed at the end thereof. A film insertion opening into which is inserted, a locking claw that is arranged in the film insertion opening and that engages with a locking hole at the end of the photographic film inserted into the film insertion opening,
A cartridge shaft having a cartridge shaft that rotatably accommodates the cartridge shaft; and a photographic film in which a locking hole at a terminal end is engaged with a locking claw in the film insertion opening is inserted into the film. The cartridge shaft is configured so that the bending angle of the photographic film is 90 degrees or more when the film is led out from the mouth to the outer peripheral surface of the cartridge shaft and winding on the outer peripheral surface is started. There is.

In order to achieve the above-mentioned object of the present invention, the second photographic film cartridge according to the present invention is: a film into which the end portion of a photographic film having a locking hole formed at the end portion is inserted. A cartridge shaft having an insertion opening and a locking claw arranged in the film insertion opening and engaging with a locking hole at the end of the photographic film inserted into the film insertion opening; and the cartridge shaft is rotatably housed. The cartridge case includes a cartridge case, and the locking claw in the film insertion opening projects in a direction approaching the center of rotation of the cartridge shaft at a portion of the inner surface of the film insertion opening located on the outer peripheral surface side of the cartridge shaft. Holds the end of the photographic film with the locking hole engaged with the locking claw close to the inner surface of the film insertion port located on the outer peripheral side of the cartridge shaft And that, it is characterized in that.

In order to achieve the above-mentioned object of the present invention, the third photographic film cartridge according to the present invention is: a film into which the end portion of a photographic film having a locking hole formed at the end portion is inserted. A cartridge shaft having an insertion opening and a locking claw arranged in the film insertion opening and engaging with a locking hole at the end of the photographic film inserted into the film insertion opening; and the cartridge shaft is rotatably housed. The cartridge case includes a cartridge case, and the locking claw in the film insertion opening projects toward the outer peripheral surface side of the cartridge shaft at the inner surface portion of the film insertion opening on the rotation center side of the cartridge shaft. The end portion of the photographic film having the locking hole engaged with is held close to a portion of the inner surface of the film insertion port located on the outer peripheral surface side of the cartridge shaft. It is characterized in.

In the first photographic film cartridge according to the present invention, which is configured as described above, the photographic film cartridge having the locking hole at the terminal end engaged with the locking claw in the film insertion opening of the cartridge shaft. The cartridge shaft is configured so that the bending angle of the photographic film is 90 degrees or more when the film is led out from the inside of the film insertion port onto the outer peripheral surface of the cartridge shaft and the winding on the outer peripheral surface is started. Therefore, a strong elastic force in the direction of restoring the bending does not occur at the bent portion of the photographic film. Therefore, even when the number of windings of the photographic film is small, or even when the number of windings is small due to the use of the photographic film, the portion corresponding to the bent portion in each winding layer of the photographic film is a cartridge. It is not inflated radially outward of the shaft. The outermost wound layer of the photographic film does not come into contact with the inner peripheral surface of the cartridge case, and each wound layer of the photographic film is not eccentric from the center of rotation of the cartridge shaft. No change occurs, and no change occurs in the drawing speed of the photographic film.

The structure of the cartridge shaft as described above is simple, and the engaging hole is formed in the film insertion port of the cartridge shaft by using the claw plate described in the above-mentioned Japanese Patent Laid-Open No. 6-266054. By simply inserting the end of the photographic film, the locking hole at the end of the photographic film can be easily engaged (that is, fixed) with the locking claw inside the film insertion opening.
Can be done. Further, the engagement of the engagement hole at the end portion of the photographic film with respect to the engagement claw in the film insertion opening (that is, release of fixation) can be easily performed by using the above-mentioned nail plate.

In the second photographic film cartridge according to the present invention, which is configured as described above, the locking claw in the film insertion opening is a portion of the inner surface of the film insertion opening on the rotation center side of the cartridge shaft. At the inner surface of the film insertion port located on the outer peripheral surface side of the cartridge shaft with the end portion of the photographic film in which the locking hole is engaged with the locking claw protruding toward the outer peripheral surface side of the cartridge shaft. Since it is held close to, the photographic film with the locking hole at the terminal end engaged with the locking claw in the film insertion opening of the cartridge shaft is guided out of the film insertion opening onto the outer peripheral surface of the cartridge shaft. The bending angle of the photographic film at the time of starting the winding on the outer peripheral surface becomes 90 degrees or more.

Therefore, no strong elastic force is generated in the folded portion of the photographic film in the direction of restoring the folded portion. Therefore, even when the number of windings of the photographic film is small, or even when the number of windings is small due to the use of the photographic film, the portion corresponding to the bent portion in each winding layer of the photographic film is a cartridge. It is not inflated radially outward of the shaft. The outermost winding layer of the photographic film does not come into contact with the inner peripheral surface of the cartridge case, and each winding layer of the photographic film is not eccentric from the center of rotation of the cartridge shaft. No change occurs, and no change occurs in the drawing speed of the photographic film.

Further, the structure of the cartridge shaft as described above is simple, and a locking hole is formed in the film insertion port of the cartridge shaft by using the claw plate described in the above-mentioned Japanese Patent Laid-Open No. 6-266054. By simply inserting the end of the photographic film, the locking hole at the end of the photographic film can be easily engaged (that is, fixed) with the locking claw inside the film insertion opening.
Can be done. Further, the engagement of the engagement hole at the end portion of the photographic film with respect to the engagement claw in the film insertion opening (that is, release of fixation) can be easily performed by using the above-mentioned nail plate.

In the third photographic film cartridge according to the present invention, which is configured as described above, the locking claw in the film insertion opening is located on the inner surface of the film insertion opening on the rotation center side of the cartridge shaft. At the inner surface of the film insertion port located on the outer peripheral surface side of the cartridge shaft with the end portion of the photographic film in which the locking hole is engaged with the locking claw protruding toward the outer peripheral surface side of the cartridge shaft. Since it is held close to, the photographic film with the locking hole at the terminal end engaged with the locking claw in the film insertion opening of the cartridge shaft is guided out of the film insertion opening onto the outer peripheral surface of the cartridge shaft. The bending angle of the photographic film at the time of starting the winding on the outer peripheral surface becomes 90 degrees or more.

Therefore, a strong elastic force in the direction of restoring the fold does not occur at the bent portion of the photographic film. Therefore, even when the number of windings of the photographic film is small, or even when the number of windings is small due to the use of the photographic film, the portion corresponding to the bent portion in each winding layer of the photographic film is a cartridge. It is not inflated radially outward of the shaft. The outermost winding layer of the photographic film does not come into contact with the inner peripheral surface of the cartridge case, and each winding layer of the photographic film is not eccentric from the center of rotation of the cartridge shaft. No change occurs, and no change occurs in the drawing speed of the photographic film.

Further, the structure of the cartridge shaft as described above is simple, and the engaging hole is formed in the film insertion port of the cartridge shaft by using the claw plate described in the above-mentioned Japanese Patent Laid-Open No. 6-266054. By simply inserting the end of the photographic film, the locking hole at the end of the photographic film can be easily engaged (that is, fixed) with the locking claw inside the film insertion opening.
Can be done. Further, the engagement of the engagement hole at the end portion of the photographic film with respect to the engagement claw in the film insertion opening (that is, release of fixation) can be easily performed by using the above-mentioned nail plate.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a so-called APS (Advanced Photo Sy) used in a photographic film cartridge according to various embodiments of the present invention described later.
The construction of a photographic film 10 according to the system standard is schematically shown. Front edge 1 of the leading edge of photographic film 10
Reference numeral 0a is inclined with respect to both measuring edges extending in the longitudinal direction of the photographic film 10 in order to facilitate feeding out from a film passage of a cartridge case, which will be described later. A sending notch 10b is formed in the vicinity of the front edge 10a on the side edge. At the end of the photographic film 10, the photographic film 10
A pair of locking holes 10c are formed symmetrically with respect to the center in the width direction, and one locking hole 10d is also formed in the middle of the pair of locking holes 10c. One locking hole 1
At 0d, the end portion of the photographic film 10 is introduced from the film passage of the cartridge case described later into the inside of the cartridge case described later, and the pair of locking holes 10 at the end portion is introduced.
When c is engaged with a pair of locking claws in the photographic film insertion opening of the cartridge shaft rotatably supported in the cartridge case described later, a predetermined claw plate (not shown) is detachably engaged. It Between the front end portion and the rear end portion of the photographic film 10, a plurality of shooting scheduled screens 10e having predetermined dimensions are secured at predetermined intervals along the longitudinal direction of the photographic film 10. In both of the above-mentioned edges of the photographic film 10, the photographic film 10 is located at a position corresponding to the both ends in the longitudinal direction in each of the plurality of scheduled image-taking screens 10e in the narrow area along the edge of the leading edge 10a. A perforation 10f is formed for feeding. Further, in both of the measuring edges of the photographic film 10, a narrow area along the measuring edge located on the opposite side of the leading edge of the leading edge 10a corresponds to between the both ends in the longitudinal direction in each of the plurality of image-capturing screens 10e. Shooting schedule screen 10 corresponding to the position to be
A magnetic recording layer 10g for recording the photographing information of e is formed.

(First Embodiment) FIG. 2 is an exploded perspective view of a photographic film cartridge 20 according to a first embodiment of the present invention which is used in combination with the photographic film 10 of FIG. ing. Photographic film cartridge 2
0 includes a cartridge shaft 22 to which the end of the photographic film 10 of FIG. 1 is detachably fixed, and a cartridge case including a pair of case pieces 24a and 24b that rotatably accommodates the cartridge shaft 22. There is. Projection portions 25a and 25b are formed on the outer peripheral surfaces of the pair of case pieces 24a and 24b, and film passage recesses 26a that cooperate with each other to form a film passage are formed on the divided surfaces of the projection portions 25a and 25b. , 26b are formed. The film passage is a pair of case pieces 24a, 24 accommodating the cartridge shaft 22.
The internal space of b (cartridge case) communicates with the external space.

The film passage recesses 26a, 26b are rotatably held by light-shielding lids 28 extending over the entire length of the film passage recesses 26a, 26b in the longitudinal direction. The light-shielding lid 28 is rotatable between an open position in which the film passage recesses 26 a and 26 b are opened and a closed position in which the film passage recesses 26 a and 26 b are closed, and the pair of case pieces 24.
It is biased to the closed position by biasing means (not shown) stored in a and 24b. Both ends 28a of the light shielding lid 28 are exposed to the external space at both end faces of the projecting portions 25a, 25b in the longitudinal direction of the film passage recesses 26a, 26b. When the photographic film cartridge 20 is loaded into a camera (not shown) conforming to the APS standard, both ends 28a of the light shielding lid 28 are connected to a light shielding lid opening lever provided in the camera (not shown) so that the above-mentioned not shown. It is rotated from the closed position to the open position against the biasing force of the biasing means.

On the inner peripheral surface of the inner space of the pair of case pieces 24a, 24b, if many winding layers of the photographic film 10 wound around the cartridge shaft 22 in the above-mentioned inner space are loosened, the outermost winding layers are loosened. The ribs 30 are provided to reduce the frictional force generated between the outermost wound layer of the photographic film 10 and the inner peripheral surface even when the inner peripheral surface contacts the inner peripheral surface.

Both ends in the longitudinal direction of the cartridge shaft 22 have a pair of case pieces 24a, 2 in the longitudinal direction.
It is rotatably supported in bearing recesses 32 formed on both end surfaces of 4b. Rotation center recesses 22a that are concentric with the rotation center of the cartridge shaft 22 are formed on both end surfaces of the cartridge shaft 22, and an engagement groove 22b is formed on the inner peripheral surface of the rotation center recess 22a. There is.

The photographic film cartridge 20 has an APS in the rotation center recesses 22a on both end surfaces of the cartridge shaft 22.
When loaded in a camera (not shown) conforming to the standard, the cartridge shaft drive member provided in the camera (not shown) is inserted, and the engagement protrusion formed on the outer peripheral surface of the cartridge shaft drive member is engaged. . The cartridge shaft driving member of the camera (not shown) is paired by rotating the cartridge shaft 22 in a predetermined direction at a predetermined speed when the light shielding cover 28 of the photographic film cartridge 20 is opened by the light shielding cover opening lever (not shown). The leading end of the photographic film 10 previously wound around the cartridge shaft 22 is led out from the film passage recesses 26a and 26b of the case pieces 24a and 24b to prepare for the film loading operation in the camera (not shown).

A photographic film detachable engagement mechanism 34 for detachably engaging the end portion of the photographic film 10 is formed at an intermediate portion of the cartridge shaft 22.

At the boundary between the middle part and both ends of the cartridge shaft 22, many winding layers of the photographic film 10 wound around the middle part of the cartridge shaft 22 are displaced in the longitudinal direction of the cartridge shaft 22. A pair of elastic flanges 36a and 36b are provided concentrically with respect to the cartridge shaft 22 to prevent this. One elastic flange 36a is rotatable relative to the cartridge shaft 22, and the other elastic flange 36b is provided on the cartridge shaft 22 via a one-way clutch (not shown). The other elastic flange 36b rotates integrally with the cartridge shaft 22 when the cartridge shaft 22 rotates in the photographic film feeding direction by the action of a one-way clutch (not shown), and when the cartridge shaft 22 rotates in the photographic film take-up direction. It rotates freely relative to the axis 22.

On the outside of one elastic flange 36a of the cartridge shaft 22, a film information display (not shown) in which various information (for example, black and white or color, ASA number, number of photographing screens, etc.) regarding the photographic film 10 is shown by symbols. A disc is provided adjacent to one elastic flange 36a, and a symbol exposure window 38 for exposing the symbol of the film information display disc (not shown) on the corresponding end faces of the pair of case pieces 24a, 24b. Are formed.

Further, on the outer side of the other elastic flange 36b of the cartridge shaft 22, not shown for displaying various information (for example, unused, in the middle of photographing, after photographing, and developed) regarding the photographic film cartridge 20. A film cartridge information display member is provided adjacent to the other elastic flange 36b, and the end faces corresponding to the pair of case pieces 24a, 24b are combined with the above-mentioned film cartridge information display member (not shown) to form the film as described above. Although a plurality of information display windows for displaying the cartridge information are formed, they cannot be seen in FIG.

The combination of the cartridge shaft 22 and the cartridge case as described above is the same as the cartridge shaft 2
It is publicly known in accordance with the so-called APS standard, except for the structure of the photographic film detachable engagement mechanism 34 described later in 2.

Next, the structure of the photographic film detachable engagement mechanism 34 of the cartridge shaft 22 will be described in detail with reference to FIGS. 3 and 4. 3 is a front view of the cartridge shaft 22, and FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.

The photographic film detachable engagement mechanism 34 extends parallel to the rotation center line of the cartridge shaft 22 at a position eccentric from the rotation center line 22a of the cartridge shaft 22 in the intermediate portion of the cartridge shaft 22 described above. It has a slit-shaped photographic film insertion opening 34a formed therein.

On the inner surface of the photographic film insertion opening 34a, the center of rotation is located at the portion on the outer peripheral surface side of the cartridge shaft 22 (in this embodiment, that is, the inner surface of the thin columnar portion 35a at the intermediate portion). 22a, a pair of locking claws 34b are formed at positions symmetrical to each other with respect to the center in the direction along the line 22a, and the pair of locking claws 34b are formed.
Are projected toward the rotation center line 22a. As shown in FIG. 4, each of the pair of locking claws 34b has an end surface on one exit side (right side in FIG. 4) of the photographic film insertion opening 34a which is a base of each of the pair of locking claws 34b. It is configured as an inclined surface that is inclined toward the other exit side (left side in FIG. 4) of the photographic film insertion opening 34a as it goes from the end to the projection end, and the other exit side of the photographic film insertion opening 34a (left side in FIG. 4). ) End faces of the pair of locking claws 34b are close to the respective base ends (portions on the outer peripheral surface side of the cartridge shaft 22 on the inner surface of the photographic film insertion opening 34a) of one of the photographic film insertion openings 34a. A locking surface cut out toward the outlet side (right side in FIG. 4) is formed.

On the inner surface of the photographic film insertion opening 34a, a portion on the rotation center line side of the cartridge shaft 22 (in this embodiment, that is, the thick columnar portion 35 of the intermediate portion).
On the inner surface of b), a pair of film pressing ribs 34c are spaced apart from each other by a predetermined distance between the pair of locking claws 34b and symmetrically with respect to the center in the direction along the rotation center line 22a. And a pair of film pressing ribs 3 are formed.
Reference numeral 4c projects toward the outer peripheral surface side of the cartridge shaft 22 on the inner surface of the photographic film insertion opening 34a. As shown in FIG. 4, the projecting ends of the pair of film pressing ribs 34c are closer to the outer peripheral surface side of the inner surface of the photographic film insertion opening 34a than the projecting ends of the pair of locking claws 34b. ing. Similarly to the pair of locking claws 34b, each of the pair of film pressing ribs 34c has an end face on one exit side (right side in FIG. 4) of the photographic film insertion opening 34a. A pair of film pressing ribs 3
4c is formed as an inclined surface that is inclined toward the other exit side (left side in FIG. 4) of the photographic film insertion opening 34a from the respective base ends toward the projecting end.

The thick columnar portion 35b of the intermediate portion of the cartridge shaft 22 is divided into two between a pair of film pressing ribs 34c as shown in FIG.

A procedure for detachably fixing the end portion of the photographic film 10 shown in FIG. 1 to the photographic film detachable engagement mechanism 34 thus constructed will be described below.

A known locking claw of a nail plate (not shown) is used as a locking hole 1 at the center of the end portion of the photographic film 10 shown in FIG.
A known nail plate (not shown) is placed along the end of the photographic film 10 in a state of being engaged with 0d. For example, the cartridge shaft 2 as in the manufacturing process of the photographic film cartridge 20.
When 2 is separated from the pair of case pieces 24a and 24b, the end portion of the photographic film 10 is attached to the photographic film detachable engaging mechanism 34 at the middle portion of the cartridge shaft 22 together with a known nail plate (not shown). Photo film insertion slot 3
4a is inserted from the inclined end surface side of the pair of locking claws 34b and the pair of film pressing ribs 34c. Then, the end portion of the photographic film 10 is pushed into the photographic film insertion opening 34b between the projecting ends of the pair of locking claws 34b and the projecting ends of the pair of film pressing ribs 34c together with a known nail plate (not shown). The pair of locking claws 34b of the photographic film detachable engagement mechanism 34 are engaged with the pair of locking holes 10c at the end portion as shown in FIGS. After this, a known nail plate (not shown) is pulled out from the photographic film insertion opening 34a, but the engagement is performed by the pair of film pressing ribs 3.
It is held by 4c.

Next, the cartridge shaft 22 has a thin columnar portion 35a on which a pair of locking claws 34b are formed.
A photograph of the outer peripheral surface of the cartridge shaft 22 when rotated (counterclockwise in FIG. 4) so as to precede the thick columnar portion 35b in which the pair of film pressing ribs 34c is formed. The film 10 is wound. At this time, the photographic film 10 extending from the pair of locking claws 34b has an end 34d on the inclined surface side of the pair of locking claws 34b with respect to the portion on the rotation center line side of the inner surface of the photographic film insertion opening 34a. , As shown in FIG.
It is brought into contact with and guided to the outer peripheral surface of the cartridge shaft 22. Then, the pair of locking claws 34b of the cartridge shaft 22
Is formed on the inner surface of the photographic film insertion port 34a on the side of the outer peripheral surface, and the locking surfaces of the pair of locking claws 34b are the base ends of the pair of locking claws 34b ( The cartridge shaft 2 is provided on the inner surface of the photographic film insertion port 34a.
2 is located closer to the outer peripheral surface of the photographic film insertion port 34 than the pair of locking claws 34b.
The end portion of the photographic film 10 toward the end 34d on the inclined surface side of the portion on the rotation center line side of the inner surface of a is the outer peripheral surface of the intermediate portion of the cartridge shaft 22 and the inner surface of the photographic film insertion opening 34a. At the boundary with the end portion 34d on the inclined surface side of the portion on the rotation center line side, the curved surface of 90 degrees or more (that is, at the bending angle of 90 degrees or more) is guided to the outer peripheral surface. That is, the photographic film 10 is led out from the film insertion opening 34a onto the outer peripheral surface of the intermediate portion of the cartridge shaft 22 with a small curvature as shown by the solid line in FIG. Therefore, in the photographic film 10, a large elastic force that tends to move outward in the radial direction of the cartridge shaft 22 does not occur at a portion corresponding to the boundary region between the photographic film insertion opening 34a and the outer peripheral surface of the intermediate portion of the cartridge shaft 22.

In this embodiment, when the photographic film 10 is wound around the outer peripheral surface of the middle portion of the cartridge shaft 22, the end portion of the photographic film 10 is moved in the radial direction of the cartridge shaft 22 by the elastic force of the photographic film 10. Since the end portion is urged toward the outside, the film insertion opening 34
A portion of the inner surface of a on the outer peripheral surface side (that is, the cartridge shaft 2
The inner surface of the columnar portion 35a having a small thickness in the middle portion of 2 is pressed. For this reason, the end portion of the photographic film 10 is shown in FIG.
Further, as shown in FIG. 4, it does not come into contact with the projecting ends of the pair of film pressing ribs 34c projecting from the portion on the rotation center line side of the inner surface of the film insertion opening 34a. As a result, the photographic film 10 extended from the pair of locking claws 34b.
The end portion of the photographic film has a horizontal cross section until it reaches the end 34d on the inclined surface side of the pair of locking claws 34b at the portion on the rotation center line side of the inner surface of the photographic film insertion opening 34a. It remains. As a result, the end portion of the photographic film 10 has a cross section in the width direction as a whole and the outer peripheral surface of the intermediate portion of the cartridge shaft 22 and the photographic film insertion port 34a.
A curved surface of 90 degrees or more at the boundary of the end surface 34d on the inclined surface side of the portion on the rotation center line side of the inner surface (i.e.,
It is guaranteed to be guided onto the outer peripheral surface at a bending angle of 90 degrees or more).

If the above-described rotation of the cartridge shaft 22 continues further, the photographic film 10 is in a state in which the first winding layer is in close contact with the outer peripheral surface of the middle portion of the cartridge shaft 22 as shown by the two-dot chain line in FIG. It is wound many times to the tip.
Even when the length of the photographic film 10 is short and the number of windings is small, or when the photographic film 10 is pulled out from the cartridge shaft 22 and the number of windings is small, the photographic film 10 is small. In each of the winding layers, the portion of the photographic film 10 corresponding to the above-mentioned boundary region is not expanded outward in the radial direction of the cartridge shaft 22 by the elastic force of the above-mentioned boundary region. For this reason, each winding layer of the photographic film 10 on the cartridge shaft 22 is not eccentric with respect to the rotation center line of the cartridge shaft 22 until the photographic film 10 is pulled out from the cartridge shaft 22 to the end portion.

As is clear from the above description, while the photographic film cartridge 20 of the first embodiment of the present invention is loaded in the corresponding camera and the photographic film 10 is used, The outermost winding layer of the photographic film 10 on the cartridge shaft 22 is always a pair of case pieces 24a, 24b of the cartridge case until the last photographing screen 10e (see FIG. 1) on the cartridge 10 is used.
Since it is distant from the inner peripheral surface, the force required to pull out the photographic film 10 does not fluctuate. Further, each winding layer of the photographic film 10 on the cartridge shaft 22 is the cartridge shaft 2.
Since it is not eccentric with respect to the rotation center line of 2, the drawing speed of the photographic film 10 does not change.

As a result, in the camera using the photographic film cartridge 20 of the first embodiment of the present invention, the motor used for winding up the photographic film 10 can be made smaller than before, and The power consumption of the motor can be reduced. Further, the above-mentioned camera (which follows the so-called APS standard) always correctly reproduces the information recorded on the magnetic recording layer 10g corresponding to each of the plurality of photographing screens 10e (see FIG. 1) of the photographic film 10 after the development of the photographic film 10. You can do it.

In the photographic film cartridge 20 conforming to the so-called APS standard, a pair of case pieces 24a, 24 of the cartridge case are used when the photographic film 10 is developed.
The photographic film 10 in which the photographic film 10 is taken out of the cartridge case without being disassembled and development is completed
0 is again wound around the cartridge shaft 22 in the cartridge case and then returned to the customer of the photographic film 10.

Here, the photographic film 10 can be taken out from the cartridge case by pulling out the photographic film 10 from the cartridge case to the end portion and then attaching a disengagement plate (not shown) having a predetermined shape and size to the pair of cartridge cases. From the film insertion recesses 26a and 26b of the pieces 24a and 24b, the cartridge shaft 22 is inserted along the side surface of the photographic film 10 on the side of the pair of locking claws 34b of the photographic film detachable engagement mechanism 34. The engagement release plate (not shown) is a photographic film detachable engagement mechanism 34 in the middle portion of the cartridge shaft 22 along the side surface of the photographic film 10.
Of the photographic film 10 in the photographic film insertion port 34a of
By being introduced between the pair of locking claws 34b and the inclined end surfaces thereof, the pair of locking holes 10c at the end of the photographic film 10 with respect to the pair of locking claws 34b of the photographic film detachable engagement mechanism 34. The engagement (see FIG. 1) can be released. The engagement release plate (not shown) together with the end portion of the photographic film 10 is pulled out from the film insertion recesses 26a and 26b of the pair of case pieces 24a and 24b of the cartridge case.

Further, the re-fixing of the end portion of the photographic film 10 to the photographic film detachable engagement mechanism 34 of the cartridge shaft 22 in the cartridge case is shown in FIG. Photographic film 10
After being aligned with the end portion of the photographic film 10 while being engaged with the central locking hole 10d of the end portion of the cartridge, the film is inserted into the film insertion recesses 26a and 26b of the pair of case pieces 24a and 24b of the cartridge case. The end portion of the photographic film 10 is inserted together with the above-mentioned known nail plate (not shown). Photographic film detachable engagement mechanism 34 in the middle of the cartridge shaft 22
As described above, the photographic film insertion opening 34a of the photographic film 10 is pulled out from the cartridge case for developing, and the end portion of the photographic film 10 is connected to the cartridge shaft 2.
A pair of case pieces 2 of the cartridge case when separated from the photographic film detachable engagement mechanism 34 in the middle part of 2.
4a, 24b facing the film insertion recesses 26a, 26b. Therefore, the film insertion recesses 26a, 26 of the pair of case pieces 24a, 24b of the cartridge case are
The end portion of the photographic film 10 inserted in b and the above-mentioned known not-shown claw plate are paired with the photographic film insertion opening 34a of the photographic film detachable engagement mechanism 34 at the intermediate portion of the cartridge shaft 22. As in the case where the pawls 34b and the pair of film pressing ribs 34c are inserted from the inclined end surface side and the cartridge shaft 22 is not housed in the cartridge case as described above, the pair of locking holes 10c at the end portion is formed.
A pair of locking claws 3 of the photographic film detachable engagement mechanism 34
4b are engaged as shown in FIGS.
After this, a known nail plate (not shown) is provided with the photographic film insertion port 3
Although pulled out from 4a, the engagement is held by a pair of film pressing ribs 34c.

(Second Embodiment) FIG. 5 is a front view of a cartridge shaft 40 of a photographic film cartridge according to a second embodiment of the present invention which is used in combination with the photographic film 10 of FIG. 6 is shown in FIG.
A cross-sectional view along line I-VI is shown.

In the photographic film cartridge of the second embodiment, the construction of the photographic film detachable engagement mechanism 42 at the intermediate portion of the cartridge shaft 40 is the first of the present invention described above with reference to FIGS. The configuration is the same as that of the photographic film cartridge of the first embodiment of the present invention described above except for the configuration of the photographic film detachable engagement mechanism 34 of the cartridge shaft 22 of the photographic film cartridge of the embodiment. is there.

Therefore, regarding the photographic film cartridge of the second embodiment of the present invention, only the photographic film detachable engagement mechanism 42 of the cartridge shaft 40 will be described in detail with reference to FIGS. 5 and 6. The same components of the cartridge shaft 40 as those of the cartridge shaft 22 of the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted.

In the second embodiment, a portion of the inner surface of the photographic film insertion opening 34a on the outer peripheral surface side of the cartridge shaft 40 (in this embodiment, that is, the thin columnar portion 35a of the intermediate portion is formed). The inner surface) has a rotation center line 22
a pair of film pressing ribs 40a spaced apart from each other by a predetermined distance in symmetrical positions with respect to the center in the direction along a.
And the pair of film pressing ribs 40a are located on the inner surface of the photographic film insertion opening 34a on the rotation center line side of the cartridge shaft 40 (in this embodiment, that is, in the middle portion of the cartridge shaft 40). It projects toward the inner surface of the thick columnar portion 35b). As shown in FIG. 6, each of the pair of film pressing ribs 40a has an end face on one exit side (right side in FIG. 6) of the photographic film insertion opening 34a that has a pair of film pressing ribs 40a. It is configured as an inclined surface that is inclined toward the other exit side (left side in FIG. 6) of the photographic film insertion opening 34a from the base end toward the projection end.

In the second embodiment, the thin columnar portion 35a of the intermediate portion of the cartridge shaft 40 is
As shown in FIG. 5, it is divided into two between a pair of film pressing ribs 40a.

On the inner surface of the photographic film insertion port 34a, at the portion on the rotation center line side of the cartridge shaft 40 (in this embodiment, that is, the inner surface of the thick columnar portion 35b at the middle portion of the cartridge shaft 40). Is a pair of locking claws 40b formed between the pair of film pressing ribs 40a at positions symmetrical with respect to the center in the direction along the rotation center line 22a and separated from each other by a predetermined distance. The pair of locking claws 40b are projected toward the outer peripheral surface of the cartridge shaft 40. More specifically, as shown in FIG. 4, each of the pair of locking claws 40b projects to approximately the same position as the outer surface of the thin columnar portion 35a in the middle portion of the cartridge shaft 40. .

Each of the pair of locking claws 40b also has an end face on one exit side (right side in FIG. 6) of the photographic film insertion opening 34a shown in FIG. 6 similarly to the pair of film pressing ribs 40a. As described above, the photographic film insertion opening 34 is formed from the base end of each of the pair of locking claws 40b toward the protruding end.
a is formed as an inclined surface toward the other exit side (left side in FIG. 6) of a, and the photographic film insertion opening 3
On the other end side of the outlet side (left side in FIG. 6) of 4a, at a position close to the base end of the pair of film pressing ribs 40a (that is, the portion on the outer peripheral surface side of the inner surface of the photographic film insertion opening 34a). One exit side of the photographic film insertion port 34a (see FIG. 6)
The locking surface 40c is formed by cutting out toward the right side).

The procedure for detachably fixing the end portion of the photographic film 10 shown in FIG. 1 to the photographic film detachable engagement mechanism 42 thus constructed is the same as in the first embodiment. The procedure is the same as the procedure for detachably fixing the end portion of the photographic film 10 shown in FIG. 1 to the photographic film detachable engagement mechanism 34 of the cartridge shaft 22.

A pair of locking holes 10c at the end of the photographic film 10 are shown in FIG. 6 with respect to a pair of locking claws 40b of the photographic film detachable engaging mechanism 42 thus constructed. After being engaged as described above, the cartridge shaft 40 has a thin columnar portion 35a formed with a pair of film pressing ribs 40a and a thick columnar portion 35b formed with a pair of locking claws 40b. Is rotated first (counterclockwise in FIG. 6), the photographic film 1 with respect to the outer peripheral surface of the intermediate portion of the cartridge shaft 40 is rotated.
The winding of 0 is performed. At this time, the photographic film 10 extending from the pair of locking claws 40b is inserted into the photographic film insertion port 34
As shown in FIG. 6, the outer periphery of the cartridge shaft 40 is abutted on the inclined surface side end portions 40d of the pair of locking claws 40b with respect to the portion on the rotation center line side of the inner surface of a. Be guided to the surface. And the cartridge shaft 40-1
A pair of locking claws 40b are formed on the inner surface of the photographic film insertion opening 34a on the side of the rotation center line, but toward the outer peripheral surface of the cartridge shaft 40, a thin columnar portion in the middle portion of the cartridge shaft 40 is formed. 35a protrudes to substantially the same position as the outer surface of the film 35a, and further, the locking surfaces 40c of the pair of locking claws 40b are the base ends of the pair of film pressing ribs 40a (that is, the inner surface of the photographic film insertion opening 34a). Since it is arranged at a position close to the outer peripheral surface side portion), the inclined surface side end portion 40d of the rotation center line side portion of the inner surface of the photographic film insertion opening 34a from the pair of locking claws 40b. The end portion of the photographic film 10 heading toward the cartridge shaft 40
End 40d on the inclined surface side of the outer peripheral surface of the intermediate portion and the inner surface of the photographic film insertion opening 34a on the rotation center line side.
At the boundary between and, it is guided to the outer peripheral surface with a curved surface of 90 degrees or more (that is, with a bending angle of 90 degrees or more). That is, the photographic film 10 is led out from the film insertion opening 34a onto the outer peripheral surface of the intermediate portion of the cartridge shaft 40 with a small curvature as shown by the solid line in FIG. Therefore, in the photographic film 10, the photographic film insertion port 3
4A and the outer peripheral surface of the intermediate portion of the cartridge shaft 40 do not generate a large elastic force toward the outer side in the radial direction of the cartridge shaft 40 at the portion corresponding to the boundary region.

In this embodiment, the photographic film 1 is used.
When 0 is wound around the outer peripheral surface of the middle portion of the cartridge shaft 40, the end portion of the photographic film 10 is urged by the elastic force of the photographic film 10 toward the outer side in the radial direction of the cartridge shaft 40. The end portion is a portion on the outer peripheral surface side of the inner surface of the film insertion opening 34a (that is, the inner surface of the thin columnar portion 35a at the middle portion of the cartridge shaft 22).
It is pressed by the projecting ends of the pair of film pressing ribs 40a projecting from. For this reason, the engagement of the pair of locking holes 10c at the end of the photographic film 10 with the pair of locking claws 40b of the photographic film detachable engagement mechanism 42 in the middle of the cartridge shaft 40 is maintained. And photographic film 1
In the cross section in the width direction, the end portion of 0 swells by its own elastic force between the pair of film pressing ribs 40a toward the outer side in the radial direction of the cartridge shaft 40 as shown in FIG. The whole has a wavy shape with a large period. This means that most of the widthwise cross-section of the end portion of the photographic film 10 is the outer peripheral surface of the intermediate portion of the cartridge shaft 40 and the inner surface of the photographic film insertion opening 34a. At the boundary between the portion on the rotation center line side and the end portion 40d on the inclined surface side,
The curved surface of 0 degrees or more (that is, at the bending angle of 90 degrees or more) does not prevent the outer peripheral surface from being led out.

If the above-mentioned rotation of the cartridge shaft 40 continues further, the photographic film 10 has the first winding layer adhered to the outer peripheral surface of the intermediate portion of the cartridge shaft 40 as shown by the two-dot chain line in FIGS. In this state, the tip is wound many times. Even when the length of the photographic film 10 is short and the number of windings is small, or when the photographic film 10 is pulled out from the cartridge shaft 40 and the number of windings is small, the photographic film 10 is small. In each of the winding layers, the portion of the photographic film 10 corresponding to the above-mentioned boundary region is not expanded outward in the radial direction of the cartridge shaft 40 by the elastic force of the above-mentioned boundary region. For this reason, the photographic film 1 on the cartridge shaft 40 is drawn until the photographic film 10 is pulled out from the cartridge shaft 40 to the end portion.
Each wound layer of 0 is not eccentric with respect to the rotation center line of the cartridge shaft 40.

As is apparent from the above detailed description, while the photographic film cartridge according to the second embodiment of the present invention is loaded in the corresponding camera and the photographic film 10 is used, the photographic film 10 is not used. The outermost winding layer of the photographic film 10 on the cartridge shaft 40 is always a pair of case pieces 24a, 24b of the cartridge case (see FIG. 2) until the last photographing screen 10e (see FIG. 1) above is used. Since it is far from the inner surface of photographic film 1,
The force required to pull out 0 does not change. Further, since each winding layer of the photographic film 10 on the cartridge shaft 40 is not eccentric with respect to the rotation center line 22a of the cartridge shaft 40, the drawing speed of the photographic film 10 does not change.

As a result, in the camera using the photographic film cartridge of the second embodiment of the present invention,
The motor used for winding the photographic film 10 can be made smaller than the conventional one, and the power consumption of this motor can be reduced. Further, the above camera (which conforms to the so-called APS standard) has a photographic film 10
Information recorded on the magnetic recording layer 10g corresponding to each of the plurality of photographing screens 10e (see FIG. 1) of the photographic film 10
It can always be reproduced correctly after development. (Third Embodiment) FIG. 7 shows a photographic film 10 of FIG.
A front view of a cartridge shaft 50 of a photographic film cartridge according to a third embodiment of the present invention used in combination with the cartridge shaft 50 is shown in FIG.
A cross-sectional view along line II is shown.

In the photographic film cartridge of the third embodiment, the construction of the photographic film detachable engagement mechanism 52 at the middle portion of the cartridge shaft 50 is the second embodiment of the present invention described above with reference to FIGS. 5 and 6. The configuration is the same as that of the photographic film cartridge of the second embodiment of the present invention except for the configuration of the photographic film detachable engagement mechanism 42 of the cartridge shaft 40 of the photographic film cartridge of the embodiment. is there.

Therefore, regarding the photographic film cartridge according to the third embodiment of the present invention, only the photographic film detachable engagement mechanism 52 of the cartridge shaft 50 will be described in detail with reference to FIGS. 7 and 8. The same components of the cartridge shaft 50 as those of the cartridge shaft 40 of the second embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted.

The photographic film detachable engagement mechanism 52 of the cartridge shaft 50 of the third embodiment differs from the photographic film detachable engagement mechanism 42 of the cartridge shaft 40 of the second embodiment described above. , Photographic film insertion slot 3
It is a configuration of the end portions 50a on the inclined surface side of the pair of locking claws 40b at the portion on the rotation center line side of the inner surface of 4a. An end portion 50a located on the inclined surface side of the pair of locking claws 40b at a portion on the rotation center line side of the inner surface of the photographic film insertion opening 34a of the cartridge shaft 50 of the third embodiment.
Is inclined so that the angle θ with respect to the tangent α on the outer peripheral surface at the boundary between the end 50a and the outer peripheral surface becomes smaller as the end 50a approaches the outer peripheral surface of the intermediate portion of the cartridge shaft 50. .

As a result, in the photographic film detachable engagement mechanism 52 of the cartridge shaft 50 according to the third embodiment, when the photographic film 10 is wound around the outer peripheral surface of the intermediate portion of the cartridge shaft 50, the pair of photographic films is paired. The end portion of the photographic film 10 from the locking claw 40b toward the end portion 50a on the inclined surface side of the inner surface of the photographic film insertion opening 34a on the rotation center line side is the outer periphery of the middle portion of the cartridge shaft 50. With a curved surface of 90 degrees or more (that is, with a bending angle of 90 degrees or more) at the boundary between the surface and the end portion 50a on the inclined surface side of the portion on the rotation center line side of the inner surface of the photographic film insertion opening 34a.
The photographic film detachable engagement mechanism 42 of the cartridge shaft 40 according to the second embodiment described above is more reliably guaranteed to be guided to the outer peripheral surface. That is, the photographic film 10
Is the film insertion opening 34a as shown by the solid line in FIG.
From the cartridge shaft 50 to the outer peripheral surface of the intermediate portion of the cartridge shaft 50 with a small curvature. Therefore, in the photographic film 10, a large elastic force that tends to move outward in the radial direction of the cartridge shaft 50 to a portion corresponding to the boundary region between the photographic film insertion opening 34a and the outer peripheral surface of the intermediate portion of the cartridge shaft 50 has a large elastic force. The size is certainly smaller than that of the photographic film detachable engagement mechanism 42 of the cartridge shaft 40 of the second embodiment.

Therefore, also in this embodiment, if the above-described rotation of the cartridge shaft 50 continues, the photographic film 10 is
7 is wound many times to the tip end portion in the state where the first winding layer is in close contact with the outer peripheral surface of the intermediate portion of the cartridge shaft 50 as shown by the two-dot chain line in FIGS. Even when the length of the photographic film 10 is short and the number of windings is small, or when the photographic film 10 is pulled out from the cartridge shaft 50 and the number of windings is small, the photographic film 10 is small. Each of the winding layers is not expanded outward in the radial direction of the cartridge shaft 50 by the elastic force of the boundary area at the portion corresponding to the boundary area of the photographic film 10. Therefore, the winding layers of the photographic film 10 on the cartridge shaft 50 are not eccentric with respect to the rotation center line of the cartridge shaft 50 until the photographic film 10 is pulled out from the cartridge shaft 50 to the end portion.

As is clear from the above detailed description, while the photographic film cartridge of the third embodiment of the present invention is loaded in the corresponding camera and the photographic film 10 is used, the photographic film 10 is not used. The outermost winding layer of the photographic film 10 on the cartridge shaft 50 is always a pair of case pieces 24a, 24b of the cartridge case (see FIG. 2) until the last photographing screen 10e (see FIG. 1) is used. Since it is far from the inner surface of photographic film 1,
The force required to pull out 0 does not change. Further, since each winding layer of the photographic film 10 on the cartridge shaft 50 is not eccentric with respect to the rotation center line 22a of the cartridge shaft 50, the drawing speed of the photographic film 10 does not change.

As a result, in the camera using the photographic film cartridge of the third embodiment of the present invention,
The motor used for winding the photographic film 10 can be made smaller than the conventional one, and the power consumption of this motor can be reduced. Further, the above camera (which conforms to the so-called APS standard) has a photographic film 10
Information recorded on the magnetic recording layer 10g corresponding to each of the plurality of photographing screens 10e (see FIG. 1) of the photographic film 10
It can always be reproduced correctly after development.

A portion of the inner surface of the photographic film insertion opening 34a of the photographic film detachable engagement mechanism 52 of the cartridge shaft 50 of the photographic film cartridge according to the third embodiment of the present invention on the side of the rotation center line. The structure such as the end portion 50a on the inclined surface side of the photographic film is removably engaged with the cartridge shaft 22 of the photographic film cartridge 20 according to the first embodiment of the present invention described above with reference to FIGS. Photographic film insertion opening 34a of mechanism 52
Of course, it can also be adopted as the end portion 34d on the inclined surface side of the portion on the rotation center line side of the inner surface of the.

The photographic film cartridge according to the first to third embodiments of the present invention described above with reference to FIGS. 1 to 8 is based on the so-called APS standard which uses the photographic film 10 according to the so-called APS standard. Although it was a photographic film cartridge, the structure of the photographic film cartridge of the present invention described in the scope of the claims of the present invention, in particular, the photographic film detachable engagement mechanism of the cartridge shaft, is well known in the art using a 35 mm film. Of course, the present invention can be applied to a photographic film cartridge, especially a photographic film detachable engagement mechanism of a cartridge shaft.

Further, from the photographic film cartridges of the first to third embodiments of the present invention described above with reference to FIGS. 1 to 8, the photographic film cartridge of the present invention is also described as follows. Can be done.

[1] A film insertion opening into which an end of a photographic film having an engaging hole formed at the end is inserted,
The locking claw that is placed in the film insertion opening and that engages with the locking hole at the end of the photographic film inserted in the film insertion opening, and the end of the photographic film that is placed in the film insertion opening and inserted in the film insertion opening A cartridge shaft having a film pressing rib that presses against the locking claw, and a cartridge case that rotatably accommodates the cartridge shaft; and the locking claw at the film insertion opening is the outer periphery of the cartridge shaft. A photographic film cartridge, which is arranged close to the surface.

[2] In the photographic film cartridge according to the above [1], a pair of the film pressing ribs is arranged on both sides of the locking claw in a direction along the rotation center line of the cartridge shaft. Is characterized by.

[3] In the photographic film cartridge described in [1], the direction in which the locking claw approaches the center of rotation of the cartridge shaft at the portion located on the outer peripheral surface side of the cartridge shaft on the inner surface of the film insertion opening. It is characterized by protruding to.

[4] In the photographic film cartridge described in [1] above, the locking claws project toward the outer peripheral surface of the cartridge shaft at a portion of the inner surface of the film insertion port on the rotation center side of the cartridge shaft. , Is characterized.

[5] A film insertion opening into which the end portion of a photographic film having a magnetic layer and locking holes formed at the end portion is inserted, and a film insertion opening which is disposed in the film insertion opening. Locking claw that engages with the locking hole at the end of the photographic film and a film pressing rib that is disposed in the film insertion opening and presses the end of the photographic film inserted into the film insertion opening toward the locking claw. A cartridge shaft having a cartridge shaft rotatably accommodated therein; and a photographic film in which a locking hole at a terminal end is engaged with a locking claw in the film insertion opening described above. The bending angle of the photographic film should be 90 degrees or more when it is drawn out from the inside of the film insertion port to the outer peripheral surface of the cartridge shaft and the winding on the outer peripheral surface is started. A photographic film cartridge comprising the above-mentioned cartridge shaft.

[6] A film insertion opening into which the end portion of a photographic film having a magnetic layer and locking holes formed at the end portion is inserted, and a film insertion opening disposed in the film insertion opening and inserted into the film insertion opening. Locking claw that engages with the locking hole at the end of the photographic film and a film pressing rib that is disposed in the film insertion opening and presses the end of the photographic film inserted into the film insertion opening toward the locking claw. And a cartridge case in which the cartridge shaft is rotatably accommodated; and the locking claw in the film insertion port is located on the outer peripheral surface side of the cartridge shaft. The projection protrudes in a direction approaching the center of rotation of the cartridge shaft, and the locking claw is attached to the end of the photographic film where the locking hole is engaged with the locking claw. A photographic film cartridge, characterized in that the photographic film cartridge is held close to a portion of the inner surface of the film insertion port located on the outer peripheral surface side of the shaft.

[7] A film insertion opening into which the end portion of a photographic film having a magnetic layer and a locking hole formed at the end portion is inserted, and a film insertion opening disposed in the film insertion opening and inserted into the film insertion opening. Locking claw that engages with the locking hole at the end of the photographic film and a film pressing rib that is disposed in the film insertion opening and presses the end of the photographic film inserted into the film insertion opening toward the locking claw. And a cartridge case in which the cartridge shaft is rotatably housed; and in the film insertion opening, the locking claw is provided on the inner surface portion of the film insertion opening on the rotation center side of the cartridge shaft. The end of the photographic film, which protrudes toward the outer peripheral surface side of the cartridge shaft, and whose locking hole is engaged with the locking claw, is the outer peripheral surface side of the cartridge shaft. A photographic film cartridge, which is held close to a portion of the inner surface of the film insertion port located at

[0078]

As described in detail above, in the photographic film cartridge according to the present invention, it is possible to eliminate the fluctuations in the force necessary for drawing the photographic film out of the cartridge case and the fluctuations in the drawing speed, and the structure is simple. Therefore, it is easy to release and fix the end portion of the photographic film to the cartridge shaft.

[Brief description of drawings]

1 is a so-called APS (Adv) used in a photographic film cartridge according to various embodiments of the present invention;
It is a top view which shows schematically the structure of the photographic film according to the standard of an anched Photo System.

FIG. 2 is an exploded perspective view of the photographic film cartridge according to the first embodiment of the present invention used in combination with the photographic film of FIG.

3 is a front view of a cartridge shaft used in the photographic film cartridge of FIG.

FIG. 4 is a transverse sectional view taken along the line IV-IV in FIG. 3;

5 is a front view of a cartridge shaft used in a photographic film cartridge according to a second embodiment of the present invention which is used in combination with the photographic film of FIG.

FIG. 6 is a transverse sectional view taken along the line VI-VI in FIG. 5;

7 is a front view of a cartridge shaft used in a photographic film cartridge according to a third embodiment of the present invention which is used in combination with the photographic film of FIG.

FIG. 8 is a transverse sectional view taken along the line VIII-VIII in FIG. 7;

[Explanation of symbols]

 10 Photographic film 10a Leading edge 10c Locking hole 10e Shooting schedule screen 10f Perforation for feeding 10g Magnetic recording layer 20 Photographic film cartridge 22 Cartridge shaft 22a Rotation center line 24a, 24b Case piece (cartridge case) 26a, 26b Film passage Recess 28 Light-shielding lid 34a Photographic film insertion opening 34b Locking claw 34c Film pressing rib 34d End 40 cartridge shaft 40a Film pressing rib 40b Locking claw 40d End 50 Cartridge shaft 50a End

Claims (3)

[Claims] 1. A film insertion opening into which a distal end portion of a photographic film having a locking hole formed at an end portion is inserted, and an end portion of a photographic film disposed in the film insertion opening and inserted into the film insertion opening. A cartridge shaft having a locking claw that engages with the stop hole; a cartridge case that rotatably accommodates the cartridge shaft; and a locking hole at the end of the locking claw inside the film insertion opening. The cartridge in which the photographic film engaged with is guided to the outer peripheral surface of the cartridge shaft from the inside of the film insertion port, and the folding angle of the photographic film when the winding on the outer peripheral surface is started is 90 degrees or more. A photographic film cartridge characterized by comprising a shaft. 2. A relationship between a film insertion opening into which the end portion of a photographic film having a locking hole formed at the end portion is inserted and an end portion of the photographic film disposed in the film insertion opening and inserted into the film insertion opening. A cartridge shaft having a locking claw that engages with the stop hole; and a cartridge case that rotatably houses the cartridge shaft; and the locking claw is provided on the outer peripheral surface side of the cartridge shaft in the film insertion port. At the position of the inner surface of the film insertion port located in the direction of approaching the center of rotation of the cartridge shaft, the locking claw is the outer end surface of the cartridge shaft at the end of the photographic film with the locking hole engaged in the locking claw. A photographic film cartridge characterized in that the photographic film cartridge is held close to a portion of the inner surface of the film insertion port located on the side. 3. A film insertion opening into which an end portion of a photographic film having a locking hole formed at an end portion is inserted, and an end portion of a photographic film disposed in the film insertion opening and inserted into the film insertion opening. A cartridge shaft having a locking claw that engages with the stop hole; and a cartridge case that rotatably accommodates the cartridge shaft; and the locking claw on the rotation center side of the cartridge shaft in the film insertion port. The inner surface of the film insertion port projects toward the outer peripheral surface side of the cartridge shaft, and the locking claw is located at the outer peripheral surface side of the cartridge shaft with the end portion of the photographic film having the locking hole engaged with the locking claw. A photographic film cartridge, characterized in that the photographic film cartridge is held close to a portion of the inner surface of the film insertion opening.