JP2001091990A - Film winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide a film winding device by which the operability of film winding is improved. SOLUTION: A winding lever 9 and a winding gear 34 are coaxially arranged. The winding lever 9 and the winding gear 34 are linked by an epicyclic clutch 35. The turning of the winding lever 9 is transmitted to the winding gear 34 through the epicyclic gear 36 at the time of winding. A non-return pawl 27 is locked at the winding gear 34, so that rotation in a direction reverse to a winding direction is stopped. The epicyclic gear 36 is constituted of a small- diameter gear 36a and a large-diameter gear 36b, and is made as an accelerating gear train. The winding gear 34 is turned to an angle more than a rotational angle set by the operation of the winding lever 9, so that the operability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film winding device for winding a photographic film, which is used for a low-cost camera or a film unit with a lens.

[0002]

2. Description of the Related Art A lens-equipped film unit which has a simple exposure mechanism and is loaded with a non-exposed photographic film and a patrone in advance at the time of manufacture, eliminating the need for cumbersome film loading and rewinding operations is disclosed by the present applicant. Manufactured and sold. In such a film unit with lens,
In order to reduce the cost, a film winding device of a mechanical mechanism is built in.

This film winding device comprises a disk-shaped winding knob and a check pawl for preventing the winding knob from rotating in the reverse direction. The winding knob is rotatably provided in a state where a part of the winding knob is exposed to the outside of the lens-fitted film unit, and internally engages with a spool of the film cartridge. When the winding knob is rotated in the film winding direction, the spool rotates in the film winding direction to wind the photographic film into the cartridge. When the photographic film is wound up by one frame length, the film winding operation of the winding knob is locked by the operation of the film winding stop mechanism. If the photographing is performed in this state, the lock by the film winding stopping mechanism is released in response to the shutter release, and the film can be wound up.

[0004] When the film is wound while the photographing is being performed, the spool diameter gradually increases, and the film diameter is increased by one.
The rotation angle of the spool per frame is reduced.
For example, in a lens-equipped film unit in which an IX240 type film is pre-loaded, the rotation angle when winding up the first frame of the film is 300 °, whereas when the last frame is wound up, it is 220 °. Similarly, in the case of a 135 type film, the first frame is 350
The last frame is 270 °.

The rotation angle which can be operated at a time with the disk-shaped winding knob is about 60 °, and this rotation operation is repeated until the film winding operation is locked by the operation of the film winding stopping mechanism. When the rotation angle of the spool per frame is large, the number of winding operations is large, and when the rotation angle is small, the number of winding operations is small.

[0006]

In the above-described film winding apparatus, the photographer has to repeat the operation of rotating the winding knob about five times on average before finishing the winding of one frame, so that the film winding operation is performed. In the meantime, there is a risk that a photo opportunity is missed.

Therefore, it is conceivable to use a winding lever type which has better operability than a disk-shaped winding knob type. The wind-up lever type has been widely used for a film wind-up mechanism for a single-lens reflex camera, a compact camera or the like for a long time.

The film winding device of the winding lever type described above has an excellent operability that the winding lever is always operated with a constant stroke, and the film winding for one frame can be correctly wound by one or two winding operations.
However, while having such good operability, a complicated mechanism for automatically adjusting the rotation angle of the spool is incorporated, and it is costly to incorporate it into a film unit with a lens or an inexpensive camera. Difficult in terms of face.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the operability of film winding is improved by employing a winding lever.
An object of the present invention is to provide a film winding device having a simple configuration at low cost.

[0010]

In order to solve the above-mentioned problems, a film winding device according to the first aspect of the present invention is provided with a winding shaft for winding a photographic film and a rotatable shaft around the winding shaft. A winding lever having a gear portion, a winding gear attached to the winding shaft and rotating integrally with the winding shaft, and allowing the winding gear to rotate in the winding direction, in a direction opposite to the winding direction. There is provided a non-return means for preventing rotation, and a planetary gear meshing with the gear portion and the hoisting gear when the hoisting lever rotates in the hoisting direction.

The planetary gear includes an intermediate gear in which a small-diameter gear meshing with the gear portion and a large-diameter gear meshing with the winding gear are integrated, and the intermediate gear is formed by rotating the winding lever in the winding direction. An engaging position that meshes with the hoisting gear; and an arm that is displaced between a retracted position where the intermediate gear separates from the gear portion and the hoisting gear to release the mesh when the hoisting lever is rotated in a direction opposite to the hoisting direction. Is preferred. Further, the non-return means is constituted by a non-return claw which is elastically deformed. The non-return claw is brought into contact with the hoisting gear, and when the hoisting gear rotates in the hoisting direction, it is elastically deformed to allow its rotation. When the gear rotates in the direction opposite to the winding direction, it is preferable to engage the teeth of the winding gear to prevent the rotation.

The vicinity of the initial position of the hoisting rotation range of the hoisting lever is set as a retracting position of the hoisting lever. In this storage position, the gear portion is constituted by a sector gear in order to release the engagement between the gear portion and the planetary gear. I have.

[0013] The film winding device according to claim 5 is
A winding shaft for winding up the photo film, a winding lever rotatably provided around the winding shaft and having a gear portion, and a winding gear attached to the winding shaft and rotating integrally with the winding shaft. A check means for allowing rotation of the hoisting gear in the hoisting direction and preventing rotation in the direction opposite to the hoisting direction, and turning the hoisting lever to the hoisting gear only when the hoisting lever rotates in the hoisting direction. And a one-way clutch for transmitting.

According to a seventh aspect of the present invention, there is provided a film winding device comprising:
A winding shaft for winding a photographic film, a winding gear attached to the winding shaft and rotating integrally with the winding shaft, a winding lever, and rotatably mounted coaxially with the winding lever and meshing with the winding gear. An intermediate gear, a one-way clutch for transmitting the rotation of the winding lever to the intermediate gear only when the winding lever rotates in the winding direction, and allowing the rotation of the winding gear or the intermediate gear in the winding direction, Has a non-return means for preventing rotation in the opposite direction.

The one-way clutch includes an urging means for urging the hoist lever and the hoist gear in the axial direction so that the hoist lever and the intermediate gear come into contact with each other, and a hoist lever and the hoist gear. A contact surface formed on a contact surface or a contact surface between the winding lever and the intermediate gear, which meshes when rotating in the winding direction, and slips when rotating in the direction opposite to the winding direction.

A winding lever is housed near the initial position of the winding rotation range of the winding lever. At this storage position, there is provided engagement releasing means for shifting the winding lever in the axial direction to release the engagement of the meshing portion. Is preferred. Further, it is preferable that the winding lever is biased in a direction opposite to a winding direction. The winding shaft is preferably engaged with a film winding shaft or a photographic film spool.

[0017]

FIG. 2 shows the appearance of a lens-fitted film unit 2 incorporating a film winding device of the present invention. Film unit with lens 2
Is composed of a unit main body 3 in which a film cartridge is previously loaded and various photographing mechanisms are incorporated, and a label 4 partially covering the unit main body 3. On the upper surface of the unit body 3, a shutter button 5, a counter window 6 for displaying the remaining number of recordable images, and a finder 7, a photographing lens 8, and the like are provided on the front surface. On the back side, a winding lever 9 is provided which is operated every time one frame is shot. The label 4 is affixed to the center of the unit main body 3, and includes a photographing lens 8, a finder 7, and a counter
And the like are exposed to the outside.

As shown in FIG. 3, the unit main body 3 includes a main body base 11, a rear cover 12, an exposure unit 13, a front cover 14, and the like. The front cover 14 is detachably attached to the front surface of the main body base 11. On the upper surface of the front cover 14, there is provided a shutter button 5 which is partially cut out and formed to be elastically deformable.

The main body base 11 includes a cartridge main body 18.
And a film roll chamber 21 for storing an unexposed photographic film 20 are integrally formed. Cartridge chamber 19 and film roll chamber 2
1 is open at the back and bottom, and after the cartridge body 18 and the photo film 20 are loaded, the rear cover 1 is closed.
2 is mounted, and thereafter, the bottom lids 22 and 23 formed integrally with the cover 12 are closed to maintain light tightness.

The cartridge chamber 19 and the film roll chamber 2
1, an exposure unit 13 is provided integrally with the main body base 11. The exposure unit 13 incorporates a film unwinding mechanism and a shutter mechanism that operate in conjunction with the shutter button 5 and the film winding device.

As shown in FIG. 1, the photographic film 20 includes:
Two large and small perforations along one side edge 2
9 and 30 are arranged at a constant pitch, and the frame feed of the photographic film 20 is performed based on this. One end of the photo film 20 is locked on a spool 26 in the cartridge main body 18, and is wound up into the cartridge main body 18 by rotating the winding lever 9.

On the upper surface of the cartridge chamber 19, the film winding device of the present invention is incorporated. The film winding device shown in FIG. 1 and FIG.
Hoisting shaft 33, hoisting gear 34, planetary clutch 35
It is composed of A part of the winding lever 9 is exposed from the rear cover 12 to the rear side. When the film is wound, the exposed part is rotated in the film winding direction (counterclockwise in the drawing).

The hoisting shaft 33 is for attaching the hoisting lever 9 and the hoisting gear 34 to the main body base 11, and further engages with the spool shaft 26 of the cartridge main body 18. For this reason, the disk portion 33a for pressing the winding lever 9 from above and the shaft portion below the disk portion 33a are integrally formed. The shaft portion includes, in order from the top, a rotating shaft 33b, an engagement shaft 33c, and a drive shaft 33d. The bearing 9a of the winding lever 9 is rotatably attached to the rotating shaft 33b. The engagement shaft 33c engages with the engagement hole 34a of the hoisting gear 34,
d engages the spool 26 of the cartridge body 18.
A claw 33f is formed at the upper end of the drive shaft 33d, and engages with the inner wall of the cartridge chamber 19 to prevent the winding shaft 33 from being pulled out. This winding shaft 33
Are not exposed outside the lens-fitted film unit 2.

The hoisting lever 9 is rotatably attached to the hoisting shaft 33 via a bearing 9a. The take-up lever 9 has a lever-shaped lever portion 9 exposed to the outside.
b, and a sector gear (fan-shaped gear) 9c provided integrally therebelow. The sector gear 9c meshes with the planet gear 36. Further, the winding lever 9 is urged in the storage direction (clockwise in the drawing) by a spring 32 (see FIGS. 5 and 6) applied between the winding lever 9 and the main body base 11.

As shown in FIG. 5, the sector gear 9c is formed only on a part of the entire circumference of the disk portion 9d.
The remaining arc portion 9e has no tooth row. Thus, when the winding lever 9 is at the storage position, the engagement between the sector gear 9c and the planetary gear 36 is released. Therefore, when the winding lever 9 starts to rotate in the film winding direction from the storage position, the arc portion 9e is located near the planetary gear 36 and does not mesh with the sector gear 9c. Then, when the winding lever 9 is rotated in the film winding direction, the arc portion 9 is rotated.
e passes, and the planetary gear 36 and the sector gear 9c mesh with each other.

When the key groove 34b of the hoisting gear 34 and the key 33e of the hoisting shaft 33 are engaged with each other, the two rotate integrally. The hoisting gear 34 has a tooth row 34c on the outer circumference. The planetary gear 36 meshes with the tooth row 34c, and the check pawl 27 provided on the upper surface of the cartridge chamber 19 is engaged with the tooth row 34c. This check claw 27
The rotation of the winding gear 34 in the direction opposite to the film winding direction (clockwise in the drawing) is prohibited. Further, a lock lever 52 of a film winding stop mechanism is engaged with the tooth row 34c, and when the lock lever 52 is engaged, the rotation of the winding gear 34 is prevented.

In the planetary clutch 35, a planetary gear 36 is set at one end of an arm 37, and these are connected to a rotating shaft 38 and a pin 3.
9 and sandwiched and connected. At this time, the rotating shaft 38
The planetary gear 3 through the through hole 37a below the arm 37.
6, the pin 39 is engaged with the engaging hole 38a of the rotating shaft 38 through the through hole 37b above the arm 37. As a result, the planet gear 36 is attached to one end of the arm 37 so as to be rotatable about the rotation shaft 38. Further, a bearing portion 37c formed at the other end of the arm 37 is rotatably fitted around a rotation shaft 28 provided on the upper surface of the cartridge chamber 19.

When the hoisting lever 9 rotates in the hoisting direction, the small-diameter gear 36a meshes with the sector gear 9c, and the large-diameter gear 36b meshes with the teeth 34c of the hoisting gear 34. Thereby, the winding lever 9
Is transmitted to the hoisting gear 34. Further, when the finger is released from the winding lever 9 and the spring 32 rotates in the reverse direction to return to the storage position, the arm 37 rotates counterclockwise about the rotation shaft 28, and the planetary gear 36 and the sector gear 9c. And the tooth row 34c is displaced from the meshing position where it meshes with the retracted position where the meshing is cut off. Arm 3
7 is provided with a spring 31. The spring 31 includes a planetary gear 36, a sector gear 9c, and a hoisting gear 34.
The arm 37 is urged clockwise so as to lightly mesh with the arm.

As described above, the hoisting lever 9 and the hoisting gear 34 are arranged coaxially, and the planetary clutch 3 is interposed between them.
By passing through 5, the planetary gear 36 is connected to transmit the rotation at the time of winding, and is disconnected at the time of operating the winding stop mechanism. Also, the hoisting lever 9, the hoisting gear 3
4. The number of teeth of the teeth provided on each of the planetary gears 36 is set to a speed-up gear train in which the hoisting gear 34 rotates more than the rotation angle by operating the hoisting lever 9.

As shown in FIG. 1, a film winding stopping mechanism,
The shutter mechanism and the continuous shooting prevention mechanism include a shutter drive lever 47, a release spring 48, a counter plate 49, a charge spring 50, a charge lever 51, a lock lever 52,
A lock spring 53, an interlocking lever 54, a cam member 55, a sprocket 58, a shutter blade 41, and the like are provided. When the photographic film 20 is wound by a length of one frame, a lock claw for winding up the film of the lock lever 52 is provided. The film winding operation is locked by setting 52a to the lock position. The shutter mechanism rotationally displaces the shutter blades 41 by a release operation, performs photographing, and sets the film winding lock pawl 52a to the retracted position. Thereby, the winding operation of the winding lever 9 becomes possible.

The film stopping mechanism and the shutter mechanism are described in detail in, for example, JP-A-10-104735.

Next, the operation of the above embodiment will be described. The initial operation of the lens-equipped film unit 2 requires a film winding operation for setting the first photographing frame. At this time, the film-with-lens unit 2 is in the same state as the shutter release completed state. Therefore, the state in which the film winding stop mechanism is not operated, that is, as shown in FIG. It is not engaged with the row 34c. Also,
Since the check pawl 27 is engaged with the hoisting gear 34,
It does not rotate in the opposite direction to the film winding direction.

In the film winding operation, a finger is hooked on the lever portion 9a to rotate the winding lever 9 in the film winding direction. When the winding lever 9 in the storage position is started to rotate, the sector gear 9c does not mesh with the planetary gear 36 for a while. When the film is further rotated in the film winding direction as it is, it passes through the arc portion 9e and meshes with the planetary gear 36. Then, the rotation of the winding lever 9 is transmitted to the winding gear 34 via the planetary gear 36, and the photographic film 20 is wound. Since the winding gear 34 rotates more with respect to the rotation angle of the winding lever 9, the winding operation is completed once or twice, depending on the gear ratio.

When the first photographing frame of the photographic film 20 is set on the aperture, the film winding stopping mechanism is operated to lock the film transport and the winding operation. As shown in FIG. 6, the lock of the film transfer is performed by engaging the lock claw 52b for preventing film winding with the cam member 55, and the locking of the film winding operation is performed by the lock claw 52a for film winding. 34c.

When the rotation of the winding gear 34 is locked, film winding by the winding lever 9 is prevented. Thus, when the photographer releases his / her hand from the winding lever 9, the winding lever 9 rotates clockwise in FIG. At this time, since the winding gear 34 is prevented from rotating, the arm 37 escapes in the counterclockwise direction. Therefore, the rotation drive of the winding lever 9 in the storage direction is not transmitted to the winding gear 34.

The shutter mechanism is charged by the shutter during the film transfer during this time. In this state, the lock lever 52 is rotated to the lock position by the urging of the lock spring 53, and the film winding lock claw 52a and the film winding stop lock claw 52b are moved up by the winding gear 3.
4 and the cam member 55 to lock the rotation thereof.

When the photographing range is confirmed with the viewfinder 7 and the shutter button 5 is pressed, the shutter mechanism operates and the shutter blades 41 are opened to perform photographing. After the photographing, the rotation lock between the winding gear 34 and the cam member 55 by the lock lever 52 is released. As a result, the film winding device returns to the initial state, and the photographer turns the winding lever 9 again to prepare for the next photographing and winds the next frame.

Next, a second embodiment of the present invention will be described. Note that the same parts as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG.
FIG. 3 is an exploded perspective view of the vicinity of a film winding device of the present embodiment, and a cartridge chamber 19 similar to the first embodiment.
(See FIG. 8). This film winding device includes a winding lever 71, a winding shaft 7
2. It comprises a hoisting gear 73 and a one-way clutch 77.

The hoisting shaft 72 includes a hoisting lever 71,
The hoisting gear 73 is attached to the main body base 11,
Further, it engages with the spool shaft 26 of the cartridge body 18. For this reason, a disk portion 72a for pressing the winding lever 9 and the coil spring 74 from above and a shaft portion below the disk portion 72a are integrally formed. The shaft portion includes, in order from the top, a rotating shaft 72b, an engaging shaft 72c, and a driving shaft 72d.
Consists of two parts. The bearing 71a of the winding lever 71 is rotatably attached to the rotating shaft 72b. The engagement shaft 72c engages with the engagement hole 73a of the hoisting gear 73. The drive shaft 72d engages with the spool 26 of the cartridge body 18. Further, a stopper 72f for retaining is formed at the upper end of the drive shaft 72d.

The hoisting lever 71 is rotatably mounted on a bearing 71a. The lever 71b has a U-shape, and a disc having a saw-toothed tooth row 71d on its lower surface. Are integrally formed. Tooth row 71d
Meshes with a serrated tooth row 73d similarly formed on the upper surface of the hoisting gear 73. A recess 71c, one step lower than the upper surface of the lever 71b, is formed around the bearing 71a, and the coil spring 74 is housed in the recess 71c.
The winding lever 71 is urged in a storage direction (clockwise in the drawing) by a spring (not shown) applied between the winding lever 71 and the main body base 11.

When the key groove 73b of the hoisting gear 73 and the key 72e of the hoisting shaft 72 engage with each other, the two rotate integrally. The hoisting gear 73 has a tooth row 73c on the outer peripheral surface thereof, and a check pawl 76 provided on the upper surface of the cartridge chamber 19 is engaged with the tooth row 73c. The check pawl 76 prevents the winding gear 73 from being rotated in the direction opposite to the film winding direction (clockwise in the drawing). Further, the lock lever 52 of the film unwinding mechanism is engaged with the tooth row 73c, and the lock lever 5
When 2 is engaged, the rotation of the hoisting gear 73 is prevented.

The one-way clutch 77 has a sawtooth-shaped tooth row 71.
d, 73 d and a coil spring 74. The tooth rows 71d and 73d are formed so that the shapes match the concave and convex portions of each other. When the winding lever 71 rotates in the film winding direction (counterclockwise direction in the drawing), the tooth rows 71d and 73 are received by the bias from the coil spring 74.
d are pressed against each other and mesh with each other, and the winding lever 71 and the winding shaft 73 rotate integrally. Further, when the winding lever 73 rotates in the direction opposite to the film winding direction (clockwise in the drawing), they disengage from each other and slide over them, so that the rotation of the winding lever 71 causes the winding gear 73 to rotate. Will not be transmitted.

In the upper part of the cartridge chamber 19, a projection 75 is provided in addition to the check pawl 76. When the hoisting lever 71 is at the storage position, the protrusion 75 pushes up the hoisting lever 71 to disengage the one-way clutch. Therefore, when the winding lever 71 starts to rotate in the winding direction from the storage position, the projection 75 interferes with the lever portion 71b, and the winding lever 71 is lifted upward in the drawing, and the one-way clutch is disengaged. I have. When the hoisting lever 71 is rotated in the hoisting direction, it passes through the protruding portion 75, so that the tooth rows 71d and 73d mesh with each other and the one-way clutch 77 is brought into the connected state.

Next, the operation of the above embodiment will be described. First, when the winding lever 71 in the storage position is started to be rotated, the projections 75 briefly use the tooth row 71d.
And 73d do not mesh with each other. If it is further rotated in the winding direction as it is, it passes through the protrusion 75 and the tooth row 71
d and 73d are engaged with each other, and the one-way clutch 77 is connected. Then, the rotation of the winding lever 71 is transmitted to the winding gear 73, and the photographic film 20 is wound.
Depending on the rotation angle and gear ratio of the winding lever 71, the winding operation is completed by performing the rotation operation about twice.

When the film is transported by one frame, the lock claw 52b for locking the film is engaged, the rotation of the winding gear 73 is locked, and the photographer stops the rotation of the winding lever 71. Thus, the user notices the completion of the winding operation and releases his / her hand from the lever portion 71b.

When the photographer releases his / her hand from the wind-up lever 71, the photographer turns clockwise by the action of the spring biasing in the storage direction. At this time, the one-way clutch 77 is disengaged and the hoisting lever 71 rotates while sliding on the upper surface of the hoisting gear 73 to return to the storage position.

Next, a third embodiment of the present invention will be described. The same components as those in the first and second embodiments described above are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG.
Is an exploded perspective view around the film winding device of the present embodiment, and is incorporated in the upper portion of the cartridge chamber 19 as in the first embodiment (see FIG. 10). The film winding device includes a winding lever 81, a winding shaft 82, a clutch gear 83, a lever holding shaft 84, a winding gear 85, and a one-way clutch 87. The hoisting lever 81, the clutch gear 83, the lever holding shaft 84, and the one-way clutch 87 are coaxial and mounted on the main body base 11 by the lever holding shaft 84.
2 and a hoisting gear 85 formed integrally with the hoisting shaft 82.

In the upper part of the cartridge chamber 19, the second
A protrusion 75 is formed in the same manner as in the first embodiment, and when the winding lever 81 is at the storage position, the winding lever 81 is pushed upward to form a one-way clutch including tooth rows 81a, 83a and a coil spring 86. 87 is disengaged.

The tooth row 85a of the hoisting gear 85 has a tooth row 83b (FIG. 1) formed on the inner peripheral surface below the clutch gear 83.
0), and transmits the rotation of the clutch gear 83 to the hoisting shaft 82. Further, at the upper end of the winding shaft 82 and at the lower end of the lever holding shaft 84, there are provided retaining claws 82.
a and 84a are formed.

Next, the operation of the above embodiment will be described. First, when the winding lever 81 in the storage position is started to rotate, the projections 75 briefly
And 83a do not mesh with each other. As it is further rotated in the winding direction as it is, it passes through the protrusion 75 and
a and 83a are engaged and the one-way clutch 87 is connected. Then, the rotation of the winding lever 81 is transmitted to the clutch gear 83, and the photographic film 20 is further wound via the winding gear 85. Depending on the rotation angle and gear ratio of the winding lever 81, the winding operation is completed by performing the rotation operation about twice.

When the film is transported by one frame, the lock claw 52b for stopping film winding is moved to the tooth row 83c.
, The rotation of the clutch gear 83 is locked, and the photographer notices the completion of the winding operation by stopping the rotation of the winding lever 81, and releases the hand from the lever portion 81b.

When the photographer releases his / her hand from the take-up lever 81, the photographer turns clockwise by the action of a spring biasing in the storage direction. At this time, the one-way clutch 87 is disengaged and the winding lever 81 rotates while sliding on the upper surface of the clutch gear 83 and returns to the storage position.

In the above embodiment, the hoist gear or the clutch gear is arranged below the hoist lever. However, the present invention is not limited to this, and the hoist gear or the clutch gear may be arranged above the hoist lever. In addition, even when a part of the hoist gear or clutch gear is exposed to the outside together with the hoist lever, even if the planetary clutch or the one-way clutch is damaged and trouble occurs in which transmission of rotation is lost, the hoist gear or clutch gear may be used. The film may be wound by directly rotating the film from the outside.

Further, in the above-described embodiment, the description has been given of an example of a film unit with a lens loaded with a plastic film cartridge. However, the present invention can also be applied to a film unit with a lens loaded with a 135-type film cartridge. It can also be used for low-cost cameras.

[0055]

As described above, in the film winding device of the present invention, by using the winding lever as the external operation member, the number of rotation operations at the time of winding can be reduced, and the one-way clutch and the planetary gear can be used. With this arrangement, it is possible to cope with fluctuations in the rotation angle per frame of the spool and to perform accurate film winding with a simple structure.

In the retracted position of the hoisting lever, the gear portion of the hoisting lever is constituted by a sector gear for releasing the engagement between the hoisting lever and the planetary gear, or the hoisting lever for releasing the engagement of the one-way clutch. An engagement releasing means for shifting in the axial direction is provided. Thereby, since the winding of the spool is completely stopped at the time of release, a failure photograph such as an exposure blur can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration around a film winding device of the present invention.

FIG. 2 is a perspective view showing an appearance of a film unit with a lens.

FIG. 3 is an exploded perspective view showing a configuration of a unit main body.

FIG. 4 is a cross-sectional view showing a configuration around a film winding device of the present invention.

FIG. 5 is an explanatory view showing a state when a film is wound up.

FIG. 6 is an explanatory diagram showing a state at the time of operating the winding stop mechanism.

FIG. 7 is an exploded perspective view around a film winding device according to a second embodiment.

FIG. 8 is a cross-sectional view around a film winding device according to a second embodiment.

FIG. 9 is an exploded perspective view around a film winding device according to a third embodiment.

FIG. 10 is a cross-sectional view around a film winding device according to a third embodiment.

[Explanation of symbols]

 2 Film unit with lens 9, 71, 81 Roll-up lever 11 Main body 18 Cartridge body 19 Cartridge chamber 20 Photo film 27, 76 Non-return claw 33, 72, 82 Roll-up shaft 34, 73, 85 Roll-up gear 75 Projection 83 Clutch gear

Claims (11)

[Claims] 1. A winding shaft for winding a photo film, and a rotatable shaft around the winding shaft.
A winding lever having a gear portion, a winding gear attached to the winding shaft and rotating integrally with the winding shaft, and a rotation in a winding direction of the winding gear, and a rotation in a direction opposite to the winding direction. And a planetary gear which meshes with the gear portion and the hoisting gear when the hoisting lever rotates in the hoisting direction. 2. The planetary gear includes an intermediate gear in which a small-diameter gear meshing with the gear portion and a large-diameter gear meshing with the winding gear are integrated, and the intermediate gear is rotated when the winding lever is rotated in the winding direction. An arm that is displaced between a meshing position where the winding gear and the winding gear mesh with each other, and a retracted position where the intermediate gear separates from the gear portion and the winding gear to release the meshing when the winding lever is rotated in a direction opposite to the winding direction. 2. The film winding device according to claim 1, wherein the film winding device comprises: 3. The check means comprises an elastically deformable check pawl, which is brought into contact with the hoisting gear, and is elastically deformed when the hoisting gear rotates in the hoisting direction to permit its rotation. 3. The hoisting gear according to claim 1, wherein when the hoisting gear rotates in a direction opposite to the hoisting direction, the hoisting gear engages with the teeth of the hoisting gear to prevent the rotation.
A film winding device as described in the above. 4. A winding position of the hoisting lever near the initial position of the hoisting rotation range is a storage position of the hoisting lever. In this storage position, the gear portion is constituted by a sector gear in order to release the engagement between the gear portion and the planetary gear. 4. The film winding device according to claim 1, wherein the film is wound up. 5. A winding shaft for winding a photo film, and a rotatable shaft provided around the winding shaft.
A winding lever having a gear portion, a winding gear attached to the winding shaft and rotating integrally with the winding shaft, and a rotation in a winding direction of the winding gear, and a rotation in a direction opposite to the winding direction. And a one-way clutch for transmitting the rotation of the winding lever to the winding gear only when the winding lever rotates in the winding direction. 6. The one-way clutch is formed on an urging means for urging the hoisting lever and the hoisting gear in the axial direction so that the hoisting lever contacts the hoisting gear, and a contact surface between the hoisting lever and the hoisting gear. The film winding device according to claim 5, further comprising: a meshing portion that meshes when rotating in the direction of rotation and slides when rotating in the direction opposite to the winding direction. 7. A winding shaft for winding a photographic film, a winding gear attached to the winding shaft and rotating integrally with the winding shaft, a winding lever, and rotatably mounted coaxially with the winding lever.
An intermediate gear that meshes with the winding gear, a one-way clutch that transmits rotation of the winding lever to the intermediate gear only when the winding lever rotates in the winding direction,
A film winding device comprising: a non-return means for allowing rotation of the winding gear or intermediate gear in the winding direction and preventing rotation in the direction opposite to the winding direction. 8. The one-way clutch is formed on a biasing means for biasing the winding lever and the intermediate gear in the axial direction so that the winding lever comes into contact with the intermediate gear, and on a contact surface between the winding lever and the intermediate gear. The film winding device according to claim 7, further comprising: a meshing portion that meshes when rotating in the direction of rotation and slides when rotating in the direction opposite to the winding direction. 9. A disengagement means for setting the vicinity of an initial position of a winding rotation range of the winding lever as a storage position of the winding lever, and displacing the winding lever in the axial direction at this storage position to release the engagement of the meshing portion. 9. The film winding device according to claim 5, further comprising: 10. The winding lever is biased in a direction opposite to a winding direction.
10. The film winding device according to any one of claims 9 to 9. 11. The film winding device according to claim 1, wherein the winding shaft is engaged with a film winding shaft or a photographic film spool.