JP3414840B2 - Film feeder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feeding device for a camera in which a pressure plate attached to a back cover is pressed against a rail surface side along which a film is placed.

[0002]

2. Description of the Related Art As a conventional type film used for cameras, the leading end is a film cartridge (patrone).
When using the film from the film, the film cartridge is often loaded with the leading end of the film reaching the film winding spool. In this way, when the film cartridge is loaded into the camera body and the back cover is closed,
The film has already been sandwiched between the pressure plate attached to the back cover via the plate spring and the rail surface, and as described above, the leading end of the film has reached the film winding spool. Since the film is wound around the film winding spool and pulled by the winding operation, the film can be wound up without any trouble even if the pressure plate is pressed against the film surface along the rail surface.

In contrast to the conventional type film whose tip has come out of the film cartridge as described above, a new standard film in which the tip has not come out of the film cartridge has been proposed in recent years. The film of the new standard in which the leading end does not come out of the film cartridge is one in which the film is sent out by rotating the film winding shaft in the film cartridge by the reel shaft.

[0004]

By the way, in the case of using the above-mentioned new standard film whose tip does not come out of the film cartridge for the camera as described above, at the initial stage of winding, the rail surface and the rail The film must pass between a pressure plate biased by a leaf spring towards the surface. However, unlike the conventional type in which the film is pulled and sent between the rail surface and the pressure plate, the film of the new standard must be pushed to send the film between the rail surface and the pressure plate. Therefore, it has been extremely difficult for the film to pass smoothly.

Therefore, an object of the present invention is to provide a camera in which a pressure plate attached to a back cover is pressed against a rail surface side along which a film is routed so that a film whose leading end does not come out of a film cartridge can be handled. An object of the present invention is to provide a film feeding device in which the pressure plate is separated from the rail surface at least in the initial stage of winding so that the film can be smoothly fed into the gap therebetween.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a film winding shaft for winding a film, for example, a film winding shaft in a film cartridge and a film wound up from the film winding shaft. The winding spool, the film winding spool and the film winding shaft can be driven, for example, a driving device such as a motor and a gear mechanism, and the film winding between the film winding shaft and the film winding spool. Attached to the rail that runs along with the back cover that matches the camera body, for example,
A film feeding device for a camera, comprising: a pressure plate biased in the rail surface direction by a leaf spring;
Is engaged with the first gear and the first gear.
The rum winding shaft is used to wind the film winding spool.
With the second gear that rotates at a peripheral speed slower than the raising rotation operation
And the first gear and the second gear
During feeding of the film from the film take-up shaft which is rotated through the rotation in conjunction with said first gear
While holding the plate by a third gear which is in a state away from the rail surface, comprising a pressure plate retracting device for retracting the pressure plate to the passage by feeding the film, before
The pressure plate retracting device is used when the film is wound on the film.
After winding on the spool,
Due to the difference in rotational peripheral speed between the pool and the film winding shaft,
The engagement between the first gear and the second gear is released.
Then, the interlocking between the first gear and the third gear is released.
It is characterized in that the holding of the retracted state of the pressure plate is released when the pressure plate is opened .

[0007]

Further, the camera is, for example, a so-called pre-winding type camera in which the film is wound up on the film winding spool in advance before photographing, and the pressure plate retracting device is, for example, all of the film. The pressure plate is held in a state of being separated from the rail surface until the pressure plate is wound up on a winding spool, and the retracted state of the pressure plate is released in association with the driving of the driving device at the time of rewinding by photographing.

[0009]

According to the present invention, the back cover is provided when the film is fed from the film winding shaft by the driving of the driving device such as a motor and a gear mechanism for driving the film winding spool and the film winding shaft in the film cartridge, respectively. A rail which is attached to the plate and is urged in the direction of the rail surface by a leaf spring or the like is moved by a pressure plate retraction device by a pressure plate slide lever or the like in conjunction with the drive of the drive device, and the film is moved along by the claws or the like. Since the pressure plate is retracted when the film is passed by feeding it out, the pressure plate is removed from the rail surface at least in the initial stage of winding, corresponding to the film whose leading end does not come out of the film cartridge. The film can be fed smoothly into the gap between them.

After the film has been wound around the film winding spool, the holding of the retracted state of the pressure plate can be released by the peripheral speed difference set between the film winding spool and the film winding shaft, that is, the reel shaft. Since the holding of the retracted state of the pressure plate is not released before the film is wound around the film winding spool, the initial feeding of the film can be reliably performed. In addition, since the holding of the retracted state of the pressure plate is released after detecting the winding of the film, the holding of the retracted state of the pressure plate is automatically released when the film is wrapped, so there is no operational trouble.

Further, in the case of a so-called pre-winding type camera in which the film is wound up on the film winding spool in advance before photographing, the pressure plate is kept away from the rail surface until all the film is wound up on the film winding spool. Since the film is held, the film can be smoothly passed through without pressing the film by the pressure plate during the preliminary winding without taking a picture. In addition, by releasing the holding of the retracted state of the pressure plate in conjunction with the drive of the drive device during rewinding by shooting, the retracted state of the pressure plate is automatically released when switching to rewinding. No hassle.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the film feeding apparatus according to the present invention will be described below with reference to FIGS. First, Fig. 1
Shows an outline of a film feeding device of a camera as an example to which the present invention is applied, showing a time of feeding a film from a film cartridge, 1 is a camera body, 2 is a rail, 3 is a back cover, 4 is a cartridge. Presser foot 5, leaf spring, 6 set screw, 7 pressure plate, 8 cam portion, 9 claw portion, 1
0 is a film winding spool, 11 is a motor, 12,
13, 14, 15, 16, 17, 18, 19, 20, 2
1, 22, 23, 24, 25, 26, 27 and 28 are gears, 29 is a sun gear, 30 and 31 are planetary gears, 3
2 is a planetary gear carrier, 33, 35, 36 are gears, 38 is a pinion gear, 39 is a pressure plate slide lever,
40 is a rack, 41 is a long hole, 42 is a guide pin, 43 is an engaging protrusion, 44 is a fixing pin, 45 is a return spring, 50
Is a film cartridge and 52 is a film.

That is, the back cover 3 for opening and closing the back side opening of the camera body 1 is provided with the pressure plate 7 via the plate spring 5. The pressure plate 7 is pressed against the surface of the rail 2 for guiding the film in the camera body 1 by the bias of the plate spring 5, and is provided integrally with the back cover 3 as shown in FIG. It is movably supported in the lateral direction via the upper, lower, left and right claw portions 9, 9, 9, 9. The pressure plate 7 has cam portions 8, 8, 8, 8 on which the claw portions 9, 9, 9, 9, can be engaged with each other in the upper, lower, left and right directions, and further has a lever engaging groove 7a in the upper center portion. ing. Further, the leaf spring 5 has the set screws 6, 6
The central portion is fixed to the back cover 3 by. As shown in FIG. 1, the back cover 3 has a cartridge retainer 4.

Further, inside the camera body 1, a film winding spool 10 and a motor 1 constituting a driving device are provided.
1 and a gear mechanism (12 to 31, 33), and a gear mechanism (35, 3) that constitutes a pressure plate retracting device that interlocks with this drive device.
6, 38, 40), a pressure plate slide lever 39, etc. are provided. A motor 11 is housed in the film winding spool 10. A large diameter gear 13 meshes with a small diameter gear 12 provided on the output shaft of the motor 11, and a small diameter gear 14 is coaxially integrated with the gear 13. The large-diameter gear 15 is meshed with. A large-diameter gear 17 meshes with a small-diameter gear 16 coaxially integrated with the gear 15,
A large-diameter gear 19 meshes with a small-diameter gear 18 coaxially integrated with the gear 17.

A large-diameter gear 20 meshes with the gear 19, and the gear 2 is coaxially integrated with the gear 20.
A gear 22 having a large-diameter ring shape meshes with the gear 1.
The ring-shaped gear 22 is integrated with the upper portion of the film winding spool 10. Also, the gear 19
A large-diameter gear 23 is engaged with the gear 2 separately.
A gear 25 having a large diameter meshes with a gear 24 coaxially integrated with the gear 3. The gear 26 meshes with the gear 25, the gear 27 meshes with the gear 26, the gear 28 meshes with the gear 27, and the sun gear 29 meshes with the gear 28.
Are in mesh.

Two planetary gears 30 and 31 are meshed with the sun gear 29 to form a planetary gear mechanism. The two planetary gears 30 and 31 are bell crank-shaped planetary gear carriers 32. Thus, the sun gear 29 is supported so as to be swingable about the axis thereof. Further, a gear 33 that selectively meshes with one of the two planetary gears 30 and 31 is provided. As shown in FIG. 2, a reel shaft 34 is coaxially integrated with the gear 33.

As shown in FIG. 2, a gear 35 having a slightly smaller diameter is coaxially and integrally provided above the planetary gear 30, and a separate gear 35 is provided above the gear 33. The gear 36 is provided on the same axis. A pinion gear 38 is connected to the gear 36 via a friction mechanism 37 such as a friction ring. That is, the pinion gear 38 becomes free to rotate when the external force acting on the meshing portion exceeds a predetermined force amount.

Further, a pressure plate slide lever 39 having a rack 40 that meshes with the pinion gear 38 is provided. As shown in FIGS. 1 and 3, the pressure plate slide lever 39 has two left and right long holes 41, 41 extending in the lateral direction. The long holes 41, 41 are fixed to the camera body 1 side. The guide pins 42, 42 provided as above are slidably engaged with each other. And this pressure plate slide lever 3
9 is integrally provided with an engagement protrusion 43 which engages with the lever engagement groove 7a provided at the upper center of the pressure plate 7. Further, between the pressure plate slide lever 39 and the fixing pin 44 provided on the camera body 1 side, a return spring 45 by a tension coil spring for urging the pressure plate slide lever 39 to the left in the drawing is provided.

A film cartridge 50 is mounted on the side opposite to the film winding spool 10 in the camera body 1. The film cartridge 50 contains a film take-up shaft 51 with which the reel shaft 34 (see FIG. 2) can be engaged, and a film 5
It houses two. That is, this film cartridge 5
A film 52 is housed in 0 in such a manner that the leading end of the film does not come out when the cartridge is loaded into the camera body 1 and the leading end is fed out by driving after loading.

The film feeding device for the camera is constructed as described above. Next, the operation of each part of the above film feeding apparatus will be described. First, the driving force of the motor 11 is from the gear 12 to the gear 1 as shown by the arrow in FIG.
3,14,15,16,17,18,19,20,21
It is transmitted to the ring-shaped gear 22 via and is transmitted to the film winding spool 10 that rotates integrally with the ring-shaped gear 22. At that time, the driving force of the motor 11 is the gears 24, 2 from the gear 23 meshing with the gear 19.
It is also transmitted to the reel shaft 34 via 5, 26, 27, 28, 29, 30, 33.

At the initial stage of winding, the pressure plate slides through the gear 35 integrated on the planetary gear 30 through the gear 36, the friction mechanism 37, the pinion gear 38, and the rack 40 as shown by the arrow in FIG. Lever 3
9 moves to the right. This pressure plate slide lever 39
The movement of the pinion gear 3 is restricted by the long holes 41, 41 and the guide pins 42, 42, and stops when the movement position to the right end in the drawing is reached, but the pinion gear 3 meshes with the rack 40.
No. 8 slips in the friction mechanism 37 portion while trying to rotate by the driving force from the motor 11.

When the pressure plate slide lever 39 is moved to the right in FIG. 1, the pressure plate 7 is integrally moved in the same direction through the engagement between the engagement protrusion 43 and the lever engagement groove 7a, and the back cover is moved. As shown in FIG. 3, the upper, lower, left and right claw portions 9, 9, 9, 9 provided on the third side are formed by the cam portion 8,
8, 8 and 8 slip out along the slopes respectively, and press plate 7
Is pushed out toward the back cover 3 direction. Therefore, as shown in FIG. 1, a gap is formed between the surface of the rail 2 and the pressure plate 7. At this time, as described above, since the reel shaft 34 is rotating, the film winding shaft 5 that engages with the reel shaft 34.
1 integrally rotates in the delivery direction to eject the film 52 from the film cartridge 50.

In this way, the film cartridge 50
The film 52 sent out from passes through the gap between the surface of the rail 2 and the pressure plate 7. And film 5
2 is further sent out and film winding spool 10
6 reaches the claw portion 10a provided on the film winding spool 10, as shown in FIG.
As described above, the perforation 52a provided on the rotating film winding spool 1 is rotated.
0 causes the film 52 to be wound up.

At the time of winding, the film winding spool 10 is set to rotate faster than the reel shaft 34 by setting the gear train from the motor 11 to the film winding spool 10 and the gear train to the reel shaft 34. Therefore, when the film 52 is wound around the film winding spool 10, a force acts in a direction in which the planetary gear 30 is disengaged from the gear 33 due to a difference in peripheral speed between the reel shaft 34 and the film winding spool 10. Then, the planetary gear carrier 32 swings, and as shown in FIGS. 4 and 5, the gear 35 integrated with the planetary gear 30 is disengaged from the gear 36, and the rack 4 is moved.
The pinion gear 38 meshing with 0 becomes free.

Since the pinion gear 38 becomes free, the pressure plate slide lever 39 is moved leftward in the drawing by the urging force of the return spring 45, as shown by the arrow in FIGS. 4 and 6. The pressure plate 7 integrally moves in the same direction through the engagement between the engagement protrusion 43 and the lever engagement groove 7a. As a result, the upper, lower, left, and right claw portions 9, 9, 9, 9 provided on the back cover 3 side are made to fall along the slopes to the cam portions 8, 8, 8, 8 formed by the upper, lower, left, and right concave portions of the pressure plate 7. Each of them is in an engaged state, and is in a state of abutting with the film 52 sandwiched between the surface of the rail 2 and the surface of the pressure plate 7 as shown in FIG.

When the film cartridge 50 is loaded, not only one frame but also a plurality of frames are sent until a photographic ready state. After that, one frame is wound for each shooting. By the way, the planetary gear 30 is connected to the gear 33.
The gear 35 integrated with the planetary gear 30 remains disengaged from the gear 36, though the engagement and disengagement with the planet gear 30 are repeated. Therefore, there is no gap between the surface of the rail 2 and the surface of the pressure plate 7, and the flatness of the film 52 is maintained.

Further, at the time of rewinding, the motor 11 rotates in the reverse direction, the gear mechanisms respectively rotate as shown by the arrows in FIG. 7, and the planetary gears 3 meshing with the sun gear 29.
The planetary gear carrier 32 supporting 0, 31 swings, the planetary gear 30 is disengaged from the gear 33 as shown in FIG. 8, and as shown in FIG. Mesh with 33. Here, since the planetary gear 31 has no gear portion that meshes with the gear 36 and the gear 36 and the pinion gear 38 are free, as shown in FIGS. 7 and 9, the pressure plate slide lever 39 is It is located on the left end side in the figure by the spring force of the return spring 45.

And, the film winding spool 1
0 and rotation of the film winding shaft 51 in the rewinding direction causes the film 52 to move to the film winding shaft 51.
Will be wound up. At the time of this rewinding, as shown in FIG. 7, the pressure plate 7 presses the film 52 against the surface of the rail 2. In this way, the film 52 is completely wound into the film cartridge 50, and the rewinding is completed.

As described above, in the film feeding apparatus of this embodiment, at the initial stage of winding the film feeding, the pressure plate 7 is separated from the surface of the rail 2 and a gap is provided between the pressure plate 7 and the film 52 so that the film 52 is smooth. It is possible to prevent the film from being fed at the time of winding and being caught or buckled in the middle. Also,
Since the lock of the pressure plate 7 in the retracted state is released after the film 52 is wound around the film winding spool 10, the lock of the pressure plate 7 in the retracted state is released before the film 52 is wound around the film winding spool 10. The film can be reliably fed at the initial stage.

Next, the second embodiment will be described. Figure 1
Reference numeral 0 shows an outline of a film feeding apparatus for a camera as a second embodiment to which the present invention is applied, showing the time when the film is fed out from the film cartridge. In the figure, it is almost the same as the first embodiment described above. The same reference numerals are given to the parts and the description thereof will be omitted, and the difference will be described below.
The second embodiment is a film feeding device in a so-called pre-winding type camera in which the film 52 is wound up on the film winding spool 11 in advance before photographing.

As shown in FIG. 10, inside the camera body 1, a rail 2, a film winding spool 10, a motor 11 constituting a drive unit, and a gear mechanism (12-2).
4, 27-31, 33, 55-57, 60-62), a gear mechanism (58, 63, 64, 40) that constitutes a pressure plate retractor interlocking with this drive device, a pressure plate slide lever 39, and the like. ing. Further, a leaf spring 5, a pressure plate 7, a claw portion 9 and the like are provided on the back cover 3 side. First, as in the first embodiment, the small-diameter gear 1 provided on the output shaft of the motor 11 housed in the film winding spool 10 is used.
A gear 23 meshes with a gear 19 that meshes with the gear 2 through gears 13, 14, 15, 16, 17, and 18.

The gear 2 integrated with the gear 23
4, the sun gear 55 is meshed, and the two planetary gears 56 and 57 are meshed with the sun gear 55.
This constitutes a planetary gear mechanism. A small-diameter gear 58 is coaxially and integrally provided on one planetary gear 57. Two planetary gears 56, 57
Is supported by a planetary gear carrier 59 having a bell crank shape so as to be swingable about the axis of the sun gear 55. A sun gear 29 is in mesh with a gear 27 that selectively meshes with one of the two planetary gears 56 and 57 via a gear 28. A gear 33 that selectively meshes with either one of the two planetary gears 30 and 31 that meshes with the sun gear 29 has a reel shaft 34 (see FIG. 2).
(See) is provided.

Further, the planetary gear 57 has a gear 6
0 meshes with the gear 60, and a gear 61 meshes with the gear 60. A small-diameter gear 62 coaxially integrated with the gear 61 meshes with the ring-shaped gear 22 integrated with the film winding spool 10. Further, a gear 63 meshes with a gear 58 integrated with the planetary gear 57, and a pinion gear 64 is connected to the gear 63 via a friction mechanism. This pinion gear 64
Is to engage with the rack 40 of the pressure plate slide lever 39.

The film feeding device for the camera is constructed as described above. Next, the operation of each section by the above film feeding device will be briefly described. First, the driving force of the motor 11 is changed from the gear 12 to the gears 13, 14, 15, 16, 17, 18, 19, 2 as shown by the arrows in FIG.
3, 24, the sun gear 55, the planetary gear 57, and the gears 60, 61, 62 are transmitted to the ring-shaped gear 22, and are transmitted to the film winding spool 10 that rotates integrally with the ring-shaped gear 22. Also, at that time,
The driving force of the motor 11 is the gears 27, 28, 29, 30, 3 from the planetary gear 56 that meshes with the sun gear 55.
3 is also transmitted to the reel shaft 34.

During winding (preliminary winding)
In the same manner as in the first embodiment, the pressure plate slide lever 39 is moved to the right side position in the drawing and stopped by the engagement of the pinion gear 64 and the rack 40. At this time, the rack 40
The pinion gear 64 that meshes with the motor 11 slips in the friction mechanism portion while trying to rotate by the driving force from the motor 11. Thus, as shown in FIG. 10, the pressure plate 7 is held in the retracted state separated from the surface of the rail 2. Therefore, the feeding of the film 52 from the film cartridge 50 is always smoothly performed.

That is, as shown in FIG. 11, even after the film 52 is wound around the film winding spool 10,
The film 52 is smoothly fed out until the winding is completed. The absorption of the peripheral speed difference between the film winding spool 10 and the reel shaft 34 during the winding is performed by the planetary gear mechanism (sun gear 2) on the film cartridge 50 side.
9, planetary gears 30, 31).

When the rewinding mode is selected, the motor 1
As shown by the arrow in FIG. 12, in the planetary gear mechanism on the film cartridge 50 side, the planetary gear 31 meshes with the gear 33 and the planet on the film winding spool 10 side as in the first embodiment. In the gear mechanism, the planetary gear 57 meshes with the gear 27 instead of the planetary gear 56. At the same time, since the planetary gear 57 disengages from the gear 60, the transmission of the driving force to the film winding spool 10 is cut off. Therefore, the pressure plate slide lever 39 becomes free and is moved to the left end position in the figure by the spring force of the return spring 45. As a result, as shown in FIG. 12, the pressure plate 7 is pressed against the surface of the rail 2 with the film 52 interposed therebetween. In this state, rewinding is performed for each shooting.

As described above, in the film feeding apparatus of the second embodiment, the pressure plate 7 is used at the time of preliminary winding without photographing.
The film 52 can pass smoothly without pressing the film 52. Also, when switching to rewinding, the locking of the pressure plate 7 in the retracted state is automatically released,
No operational hassles.

In the above embodiment, the pressure plate slide lever (mechanism) is constituted by the pressure plate slide lever interlocked with the drive device and the claw portion cam-engaged with the pressure plate, but the present invention is not limited to this. Instead, the pressure plate retracting device having another configuration may be used. Further, it is needless to say that the structure of the driving device capable of driving the film winding spool and the film winding shaft is arbitrary, and in addition, the specific detailed structure and the like can be appropriately changed.

[0040]

As described above, according to the film feeding apparatus of the present invention, when the film is fed, the pressure plate attached to the back cover and biased in the rail surface direction is used to drive the driving apparatus. Since the film is held in a state of being separated from the rail surface along which the film runs along, and the pressure plate is retracted with respect to the passage by sending out the film, corresponding to the film whose tip does not come out of the film cartridge,
At least in the initial stage of winding, the pressure plate can be separated from the rail surface so that the film can be smoothly fed into the gap therebetween. Therefore, it can be prevented that the film cannot be fed due to being caught or buckled during the feeding of the film.

[0041] Note that after the full Irumu is wound around the film winding spool, by releasing the holding of the retracted state of the pressure plate by the set peripheral speed difference in the film winding spool and film take-up shaft, the film is wound up film The holding of the retracted state of the pressure plate is not released before the film is wound around the spool, and the initial feeding of the film can be reliably performed. Moreover, the holding of the retracted state of the pressure plate is released after the film winding is detected.
By the Turkey, since the film is wound when automatically held in retracted state of the pressure plate is released, the advantage of performing a no troublesome operational obtained.

Further, in the so-called pre-winding type camera in which the film is wound up on the film winding spool in advance before photographing, as described in claim 2 , until the film is completely wound up on the film winding spool, the pressure plate is kept on the rail surface. By holding the film away from the film, it is possible to smoothly pass through the film without pressing the film by the pressure plate during the pre-winding without photographing. Therefore, it is possible to prevent that the film to be fed is caught or buckled in the middle of the pre-winding without photographing and the film cannot be fed. Moreover, by releasing the holding of the retracted state of the pressure plate in association with the drive of the drive device during the rewinding by photographing, the holding of the retracted state of the pressure plate is automatically released when switching to the rewinding operation. You can get the benefits you have done without the hassle.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an outline of a film feeding device of a camera as an example to which the present invention is applied, showing a time when a film is fed from a film cartridge.

FIG. 2 is a vertical cross-sectional side view showing a configuration of a drive device portion on the film cartridge side in FIG.

FIG. 3 is a schematic perspective view showing the relationship between the film cartridge, the film winding spool, the pressure plate, and the pressure plate slide lever in FIG.

FIG. 4 is a schematic plan view showing a normal shooting after the film is wound around the film winding spool from the state of FIG.

5 is a vertical cross-sectional side view showing a configuration of a drive device portion on the film cartridge side in FIG.

6 is a schematic perspective view showing the relationship among the film cartridge, film winding spool, pressure plate, and pressure plate slide lever in FIG.

FIG. 7 is a schematic plan view showing the film rewinding in the film feeding apparatus of FIG. 1 to which the present invention is applied.

FIG. 8 is a vertical cross-sectional side view showing the configuration of a drive device portion on the film cartridge side in FIG.

9 is a schematic perspective view showing the relationship among the film cartridge, film winding spool, pressure plate and pressure plate slide lever in FIG.

FIG. 10 is a schematic plan view showing an outline of a film feeding device of a camera as a second embodiment to which the present invention is applied, showing a time when a film is fed from a film cartridge.

11 is a schematic plan view showing the film winding spool after the film has been wound around the film winding spool from the state of FIG. 10; FIG.

FIG. 12 is a schematic plan view showing the film rewinding in the film feeding apparatus of FIG. 10 according to the second embodiment.

[Explanation of symbols]

1 Camera Main Body 2 Rail 3 Back Lid 4 Cartridge Presser 5 Leaf Spring 6 Set Screw 7 Pressure Plate 8 Cam 9 Claw 10 Film Winding Spool 11 Motor 12, 13, 14, 15, 16, 17, 17, 18, 19, 2
0, 21, 22, 23, 24, 25, 26, 27, 28 Gear 29 Sun gear 30, 31 Planetary gear 32 Planetary gear carrier 33, 35, 36 Gear 34 Reel shaft 37 Friction mechanism 38 Pinion gear 39 Pressure plate slide lever 40 Rack 41 long hole 42 guide pin 43 engaging projection 44 fixing pin 45 return spring 50 film cartridge 51 film winding shaft 52 film 55 sun gear 56, 57 planetary gear 58, 60, 61, 62, 63 gear 59 planetary gear carrier 64 pinion gear

Claims (2)

(57) [Claims] 1. A film take-up shaft around which a film is wound, a film take-up spool for taking up a film fed from the film take-up shaft, and a drive device for driving the film take-up spool and the film take-up shaft, respectively. And a rail along which the film is routed between the film take-up shaft and the film winding spool, and a pressure plate attached to a back cover fitted to the camera body and biased in the rail surface direction. The film feeding device, the drive device meshes with the first gear and the first gear.
The film winding shaft is set to the film winding
Rotate at a lower peripheral speed than the hoisting and rotating motion of the pool
Two gears, which are rotated through the first gear and the second gear, and are interlocked with the first gear when the film is fed from the film winding shaft. Third gear that is rotated by
While holding the pressure plate in a state away from the rail surface by comprising a pressure plate retracting device for retracting the pressure plate to the passage by feeding the film, the pressure plate retracting device, the film is the film winding
After winding the film on the spool, wind up the film.
For the difference in rotational peripheral speed between the spool and the film winding shaft
Disengages the first gear from the second gear
And the interlocking between the first gear and the third gear is released.
The film feeding device is characterized in that the holding of the retracted state of the pressure plate is released by being pressed. 2. The camera is a camera of a type in which the film is wound up on the film winding spool in advance before photographing, and the pressure plate retracting device is used until the film is entirely wound up on the film winding spool. Hold the pressure plate away from the rail surface,
2. The film feeding apparatus according to claim 1, wherein the holding of the retracted state of the pressure plate is released in association with the driving of the drive unit at the time of rewinding by photographing.