JPH05127317A - Photographic film cartridge - Google Patents

Abstract

PURPOSE:To reduce load on the rotation of a spool in the case of housing film in a cartridge main body as to a photographic film cartridge where the leading edge of the film is fed to the outside of the cartridge main body from a film feeding port by the rotation of the spool. CONSTITUTION:When the spool 3 is rotated in a film feeding direction, an engaging tooth 7a is engaged with a notch 8a and flanges 6a and 6b are rotated together with the spool 3. When the spool 3 is rotated in a film housing direction, the engagement of the tooth 7a with the notch 8a is released and the spool 3 is rotated independently of the flanges 6a and 6b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film cartridge in which a roll film contained in a cartridge body is delivered to the outside by rotating a spool.

[0002]

2. Description of the Related Art Recently, as seen in U.S. Pat. No. 4,423,943, a photographic film cartridge has been proposed in which a roll film accommodated in a cartridge body is sent to the outside by rotating a spool. In the photographic film cartridge disclosed in this publication, a protrusion (lip) that partially encloses the outermost periphery of the film from both ends is provided on the outer periphery of a pair of flanges integrally formed with the spool.
Are formed, and these lips prevent the film from being loosened and the rotation of the spool is transmitted to the roll film. Then, in the cartridge body, an expanding member is provided near the film outlet for expanding the lip to a width greater than the width of the film, whereby the film is led out toward the discharge port from between the expanded lip.

[0003]

However, in the photographic film cartridge described in the above publication, since the lip is constantly expanded by the expanding member, the friction between them is large, and not only when the film is sent out. ,
Similarly, when the film is rewound without having to transmit the spool driving force to the leading end of the film, for example, several hundred gc.
High torque of m will be applied to the spool. Therefore, a large load is constantly applied to the spool driving motor of the camera, and battery consumption is accelerated. The present invention has been made in consideration of the above problems of the prior art,
An object of the present invention is to provide a photographic film cartridge in which the load on the spool rotation is reduced when the film is stored in the cartridge body.

[0004]

A pair of flanges for regulating looseness of the film is provided on the spool as separate members, and when the spool is rotated in the film feeding direction, the flanges engage with the spool and rotate together. A one-way clutch mechanism is provided between the spool and the flange so that when the spool is rotated in the film storage direction, the engagement between the flange and the spool is released and only the spool is rotated. Further, in order to ensure that the one-way clutch mechanism works, an engaging mechanism for restricting rotation of the flange in the film storage direction is provided between the flange and the cartridge.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. 1 and 2, the cartridge main body 1 is composed of two parts, an upper case 1a and a lower case 1b. Then, the film 2 is fixed to the spool 3 at the rear end thereof and is wound around the spool 3 in the cartridge main body 1
It is stored inside. Ports 4a and 4b are integrally formed in the upper case 1a and the lower case 1b, and an opening 4 formed at a joint between them serves as a passage for taking the film 2 in and out. Further, on the inner walls on both side surfaces of the upper case 1a, flange pressing portions 5a and 5b each formed of two ribs are formed at positions substantially facing the port portion 4a. A well-known telescope 15 is attached to the inside of the opening 4 for light shielding, but it is omitted in FIG. 2 in order to avoid complication of the drawing.

Flange 6a and 6b are inserted into the spool 3 from both ends thereof. Engaging teeth 7a, 7b forming a one-way clutch are formed between the both ends of the spool 3 with the flanges 6a, 6b, and correspondingly, the flanges 6a, 6b are provided with tooth-shaped notches 8a, 8b. Has been done. As a result, the flanges 6a and 6b are rotated integrally with the spool 3 only when the spool 3 is rotated in the film feeding direction. Also, the engaging teeth 7a, 7b and the notch 8
There is looseness in the engaging portion with a and 8b, and the flange 6
The a and 6b have a degree of freedom with respect to the spool 3 not only in the axial direction but also in the inclination direction. And the flanges 6a, 6
Since the flange pressing portions 5a and 5b are slidably contacted with the outside of b to narrow the gap between the flanges 6a and 6b,
6b is rotated together with the spool 3 while maintaining a state in which it is opened more than the width of the film 2 on the opening 4 side.

A recess 9 is formed at the center of the flanges 6a and 6b.
a, 9b are formed, and slopes 10a, 10 formed on the outer periphery
It is connected to b. Then, both end surfaces of the film 2 are sandwiched between the recesses 9a and 9b of the flanges 6a and 6b, and the outermost winding diameter of the film 2 is regulated by the inclined surfaces 10a and 10b.

A tip separating claw 14 is provided deep inside the port portion 4b of the lower case 1b. This tip separation claw 1
When the leading end portion 2a of the film is rotated to the port portion 4b, the film 4 is separated from the film roll to form the opening 4
Perform the action of leading to.

The operation of the first embodiment will be described below. When this photo film cartridge is loaded in a camera and the spool 3 is rotated clockwise in FIG. 1 via a mechanism on the camera side, the engagement teeth 7a, 7b and the cutouts 8a, 8b are engaged with each other to cause the flange 6a to move. , 6b also rotate together with the spool 3. Since the flanges 6a and 6b are inclined with respect to the spool 3 by the flange pressing portions 5a and 5b so that the width thereof becomes narrower on the side facing the opening 4, the film 2 is formed by the recess 9 of the flanges 6a and 6b at this portion. It is pinched. Therefore, the rotation of the flanges 6a and 6b is transmitted to the film 2 wound in a roll shape as it is, and the film 2 also rotates together with the rotation of the flanges 6a and 6b. Moreover, the outermost film 2 is not loosened by the slopes 10a and 10b.

When the film tip portion 2a comes to the position of the tip separating pawl 14 as the spool 3 rotates, the film tip portion 2a is scooped up by the tip separating pawl 14. In this way, after the film leading end 2a is scooped up from the roll-shaped film 2, when the spool 3 is subsequently rotated, the film 2 is always held by the flanges 6a and 6b on the side where the flange spacing is narrowed. 2 rotates together with the spool 3 and the flanges 6a and 6b, and as shown in FIG. 2, the film front end 2a is fed toward the opening 4 from the portion where the flange interval is widened.

At the position toward the opening 4, the outer peripheral edges of the flanges 6a and 6b are only partially in contact with the both end edges of the film 2, so that both side edges of the film 2 have the flange 6.
It is not strongly pressed by the concave portions 9a and 9b of a and 6b,
The film 2 is delivered smoothly without damaging the edges of the film 2. After the film 2 has been fed from the cartridge body 1 in this way, the film leading end 2a is caught by the winding shaft on the camera side, and thereafter, the film is fed by driving the winding shaft.

When the film 2 is wound around the cartridge main body 1, the spool 3 is rotated in the reverse direction. Due to the reverse rotation of the spool 3, the engagement teeth 7a, 7b no longer engage with the notches 8a, 8b, and the flanges 6a, 6b do not rotate, but only the spool 3 rotates. As a result, the drive motor on the camera side is driven with a light load, and the filmed film 2 that has been photographed is taken up by the spool 3 through the opening 4 and the portion where the flange interval is widened, and the film front end portion. The winding of the film 2 is completed in the state where the film 2a is also completely wound inside the cartridge body 1.

In the embodiment described above, the one-way clutch provided between the flange and the spool is composed of a gear that meshes in the direction perpendicular to the axial direction of the spool, but as in the second embodiment shown in FIG. The teeth 20a and 21a may mesh with each other in the same axial direction of the spool 20. The flange 21 freely penetrates the shaft end portion 20b of the spool 20 through the hole 21b, and the flange 21 is axially movable relative to the spool 20. Therefore, when the shaft end portion 20b of the spool 20 is rotated in the film rewinding direction, the flange 21 is moved in the direction away from the tooth 20a by the action of the teeth 20a and 21a, and the tooth 2 is rotated.
The engagement of 0a and 21a is released, and the spool 20 is rotated independently.

Next, a third embodiment of the present invention will be described with reference to FIGS.
Will be described. In the third embodiment, elastically deformable engaging pieces 30 are provided on the flanges 6a and 6b of the first embodiment, and the flange pressing portion 5 of the lower case 1b is further provided.
Engagement portions 31a and 31b are provided at the ends of a and 5b.

The operation of the third embodiment is the same as that of the first embodiment until photographing is performed. When filming is completed and the film 2 is wound around the cartridge body 1, the spool 3 is reversed in the film storage direction. By the reverse rotation of the spool 3 in the film storage direction, the engagement teeth 7a, 7b are no longer engaged with the cutouts 8a, 8b, and the flanges 6a, 6b.
Since the engaging piece 30 engages with the engaging portions 31a and 31b, the rotation in the film storage direction is restricted. by this,
Flange 6 even if there is friction between the film and the flange
The a and 6b do not rotate, the one-way clutch mechanism surely works to rotate only the spool 3, and the drive motor on the camera side is driven with a light load. The flange 6
When a and 6b are rotated in the film feeding direction, the engaging piece 30 hits the flange pressing portions 5a and 5b and is deformed, so that they do not engage with the engaging portions 31a and 31b.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 6, 7 and 8. A spool 45 around which a photo film 44 is wound is rotatably mounted inside the cartridge body 42 having the opening 42c.
A flange 46a provided separately from the shaft of the spool 45,
46b is divided into a plurality of slits 47, and arc-shaped projections 49 for preventing the film 44 from being loosened are provided inside the tip ends of the respective divided pieces 48.

Flanges 46a and 46b are inserted into the spool 45 from the tip side thereof. Spool 45
Engaging teeth 55a and 55b forming a one-way clutch are formed between both ends of the flanges 46a and 46b, while elastically deformable engaging claws 56 are formed on the flanges 46a and 46b. Has been done. When the spool 45 is rotated in the film feeding direction, the engagement teeth 55a, 55b and the engagement claw 56 are engaged, so that the flanges 46a, 46b are rotated together with the spool 45. When the spool 45 is rotated in the film storage direction, the engaging claws 56 of the flanges 46a and 46b hit the engaging teeth 55a and 55b and are elastically deformed, so that they are not engaged and the flanges 46a and 46b are not rotated.

The inner peripheral wall of the cartridge main body 42 excluding the vicinity of the entrance of the film passage 51 extending from the opening 42c to the inside of the cartridge main body 42 is regulated in position so that each tip of the divided piece 48 is not deformed outward. Control projection 5
Two are provided. At the entrance of the film passage 51, the taper-shaped film tip 44a is separated from the roll-shaped film 44 and guided to the opening 42c. Guide protrusions 51a and 51b for pushing and bending to release the regulation of the film end portion are provided.

The end of the regulating projection 52 and the guide projection 51
Tapers 52a and 51d for smoothly rotating the flanges 46a and 46b are provided at the ends of b. An end portion of the guide protrusion 51a on the opening 42c side is an engagement portion 51c which is not tapered. In addition,
A light-shielding telemper 54 is attached to the opening 42c.

Next, the operation of this embodiment will be described.
When this photo film cartridge 41 is loaded into the camera, the spool 4 is moved by the film initial feed mechanism of the camera.
5 is rotated in the film feeding direction. And spool 4
5, the engaging teeth 55a, 55b and the flange 46
The flanges 46a and 46b are rotated integrally with the spool 45 by the engagement with the engagement claws 56 provided on the a and 46b.

At this time, the film 44 tries to be unwound, but each of the divided pieces 48 is restricted by the restriction projection 52 except for the vicinity of the entrance of the film passage 51, so that each divided piece is prevented. The arc-shaped projection 49 of 48 holds down the outermost edges of the film 44,
In No. 4, the rotation of the spool 45 is transmitted to the film tip end 44a without further unwinding. As a result, the film front end 44a is rotated clockwise together with the roll-shaped film 44.

In the vicinity of the entrance of the film passage 51, the restriction projection 52 is omitted and the guide projections 51a,
Since the split piece 48 is pushed outward by 51b, the regulation of both ends of the film 44 is released. As the spool 45 rotates, the film tip 44a is separated from the lower film 44 by the guide projection 51b and rides on the upper surface of the guide projection 51b, and the film passage 51
Is sent to the outside via. After that, the film tip 44
a is caught by the take-up shaft on the camera side, and thereafter, the film is fed by driving the take-up shaft.

When the film 44 is taken up and the film 44 is wound around the cartridge main body 42, the spool 45 is reversed in the film accommodating direction. The engagement teeth 55a and 55b are moved to the flange 46 by the reverse rotation of the spool 45 in the film storage direction.
The flanges 46a and 46b are prevented from engaging with the engaging claws 56 of the a and 46b, and the side portions of the arc-shaped projection 49 of the flanges 46a and 46b are engaged with the engaging portions 51c of the guide projections 51a. It As a result, even if there is friction between the film and the flange, the flanges 46a and 46b do not rotate, the one-way clutch mechanism works reliably to rotate only the spool 45, and the drive motor on the camera side is driven by a light load. Will be done.

Next, a fifth embodiment of the present invention will be described with reference to FIGS.
11 and FIG. 11. In FIG. 9, which shows a state in which the photographic film cartridge 61 of the fifth embodiment of the present invention is disassembled, the photographic film cartridge 61 includes a spool 66 around which the photographic film 65 is wound in a roll shape, and a cartridge main body 67 for accommodating the spool 66. And side plates 68 and 69 that rotatably support the spool 66 and close the cartridge body 67 from the side in a light-tight manner.

The spool 66 has a flange 66a thinly formed so as to have flexibility, and is integrally formed of plastic. Into the spool 66, a separate flange 80 having a thin thickness is inserted at its end so as to have flexibility. An elastically deformable engaging claw 82 for forming a one-way clutch is formed between the end of the spool 66 and the flange 80, and correspondingly, an engaging tooth 81 is formed on the flange 80. Has been done.

When the spool 66 is rotated in the film feeding direction, the engaging claw 82 and the engaging tooth 81 are engaged with each other, so that the flange 80 is rotated integrally with the spool 66. When the spool 66 is rotated in the film storage direction, the spool 66
Since the engaging claw 82 of the above hits the engaging tooth 81 and is elastically deformed, the engaging claw 82 does not engage and the flange 80 is not rotated. Further, the flange 80 is provided with an elastically deformable engagement piece 83 that engages with an engagement portion 84 described later.

The photographic film 65 has its end portion fixed to the spool 66 between the flanges 66a and 70, and is wound in a roll shape on the spool 66 so that the respective end faces are along the inside of the flanges 66a and 70. It is completely caught up in the cartridge body 67 up to the tip. The cartridge body 67 is provided with an opening 72 to which a light-shielding telem 71 is joined.

A spool 66 is provided at the center of the side plate 68.
Is provided with a bearing opening 68a for rotatably supporting the end portion 66c (see FIG. 10) of the flange 66, and the flange 66 is provided on the inner wall surface.
A ridge portion 68b that presses a part of a is provided. A bearing opening 69a for rotatably supporting the end portion 80d of the flange 80 is provided in the center portion of the side plate 69, and the inner peripheral surface of the bearing opening 69a is engaged with the engaging piece 83 of the flange 80 to form the flange 80. Engagement portion 8 for restricting rotation in the film storage direction
4 are provided. Further, the inner wall surface of the side plate 69 is provided with a ridge portion 69b that presses a part of the flange 80.

In FIG. 10 showing the longitudinal section of the photographic film cartridge 61, the inner dimensions of the ridges 68b and 69b are set to be smaller than the outer dimensions of the flanges 66a and 80. 68b and 69b press the flanges 66a and 80 to deform them. As a result, the end surface of the photographic film 65 on the outer side than the inner side is clamped more strongly by the flanges 66a and 80. Therefore, if the spool 66 is rotated in the direction of arrow A shown in FIG. 9, the tip end portion 65a of the photographic film 65 is opened by the friction engagement between the flanges 66a and 80 and the end surface of the photographic film 65.
2 is sent out to the outside of the cartridge main body 67.

The operation of the fifth embodiment is the same as that of the first embodiment until photographing is performed. When the photographing is completed and the film 65 is wound around the cartridge main body 67, the spool 66 is reversed in the film storing direction. Spool 6
By the reverse rotation of 6 in the film storing direction, the engaging claw 82 no longer engages with the engaging teeth 81, and the flange 80 engages the engaging piece 83 with the engaging portion 84, so that the rotation in the film storing direction is restricted. To be done. As a result, even if there is friction between the film and the flange, the flange 80 does not rotate, the one-way clutch mechanism operates reliably to rotate only the spool 66, and the drive motor on the camera side is driven with a light load. Like

As the photographic film cartridge to which the present invention can be applied, in addition to the embodiment described above, a soft material is used for the flange or flexibility is provided by dividing the flange, and the flange is provided near the port opening. Alternatively, the film may be deformed to release the film from being held by the flange, and the film may be guided to the film delivery port. Further, a flexible flange may be used, and the film may be clamped by deforming the flange by a cam or the like provided in the cartridge body, and the leading end of the film may be fed out from the film delivery port.

[0032]

As described above, according to the photographic film cartridge of the present invention, when the spool is rotated in the film feeding direction, the flange engages with the spool and rotates together, and the spool rotates in the film storing direction. When this is done, the engagement between the flange and the spool is released so that only the spool is rotated. Therefore, when the film is stored in the cartridge body, the spool can be rotated with a light torque. Further, as a result, the motor for driving the spool of the camera is not always subjected to a large load, which contributes to the saving of the power supply battery. Further, since the engaging mechanism for restricting the rotation of the flange in the film storage direction is provided between the flange and the cartridge, the one-way clutch mechanism is provided even if there is friction between the film and the flange when the film is stored. Ensures that only the spool is rotated and the drive motor on the camera side is driven with a light load.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a photographic film cartridge embodying the present invention.

FIG. 2 is a cross-sectional view of an essential part of the photographic film cartridge shown in FIG.

FIG. 3 is a partially cutaway plan view showing a main part of a second embodiment of the present invention.

FIG. 4 is an exploded perspective view of a third embodiment of the present invention.

5 is a cross-sectional view of essential parts of the photographic film cartridge shown in FIG.

FIG. 6 is an exploded perspective view of a fourth embodiment of the present invention.

FIG. 7 is a side sectional view showing a main part of the photographic film cartridge shown in FIG.

FIG. 8 is a cross-sectional view of an essential part of the photographic film cartridge shown in FIG.

FIG. 9 is an exploded perspective view of a fifth embodiment of the present invention.

FIG. 10 is a cross-sectional view of an essential part of the photographic film cartridge shown in FIG.

11 is a side sectional view showing a main part of the photographic film cartridge shown in FIG.

[Explanation of symbols]

 1,42,67 Patrone body 2,44,65 Film 3,20,45,66 Spool 5a, 5b, Flange pressing part 6a, 6b, 21, 46, 66a, 80 Flange 7a, 7b, 55a, 55b Engaging tooth 8a, 8b, notches 20a, 21a teeth 56, 82 engaging claws 30, 83 engaging pieces 31a, 31b, 51c, 84 engaging portions

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 16, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

The operation of the fifth embodiment is the same as that of the first embodiment until photographing is performed.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

After filming is completed, the film 65 is read in a patrone book.
When winding around the body 67, the spool 66 is stored in the film.
Reverse to the delivery direction. Spool 66 film storage direction
The engaging claw 82 does not engage with the engaging tooth 81 due to the reverse rotation to
Further, the engaging piece 83 of the flange 80 is engaged with the engaging portion 84.
Since they match, rotation in the film storage direction is restricted. This
This causes friction between the film and the flange.
The flange 80 does not rotate, and the one-way clutch mechanism is reliable.
To drive only the spool 66 and drive the camera side.
The motor will be driven with a light load.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuya Takatori 210 Nakanishuma, Minamiashigara-shi, Kanagawa Fuji Photo Film Co., Ltd.

Claims (2)

[Claims] 1. A photographic film cartridge in which a spool around which a film is wound is rotatably accommodated in a cartridge body, and the spool is rotated so that the leading end of the film is fed out of the cartridge body out of the cartridge body. The spool is provided with a pair of flanges that regulate looseness of the film, and when the spool is rotated in the film delivery direction, the flanges engage the spool and rotate together, and the spool is rotated in the film storage direction. A photographic film cartridge wherein a one-way clutch mechanism is provided between the spool and the flange so that sometimes the flange and the spool are disengaged and only the spool is rotated. 2. A photographic film cartridge in which a spool around which a film is wound is rotatably housed in a cartridge body, and the spool is rotated so that the leading end of the film is fed out of the cartridge body out of the cartridge body. The spool is provided with a pair of flanges that regulate looseness of the film, and when the spool is rotated in the film delivery direction, the flanges engage the spool and rotate together, and the spool is rotated in the film storage direction. At times, a one-way clutch mechanism is provided between the spool and the flange so that the engagement between the flange and the spool is released and only the spool is rotated, and the flange in the film storage direction is provided between the flange and the cartridge. A photographic film cartridge which is provided with an engagement mechanism for restricting rotation.