JPH03223735A - Film feeding device for camera - Google Patents

Abstract

PURPOSE:To attain the effective utilization of a space in each part and efficiently disposed construction by arranging a driving system for feeding and rewinding a film on a cartridge mounting side and independently disposing a take-up motor for rotate-driving a take-up spool, and a driving system for taking up the film with its rotation transmission system. CONSTITUTION:The prescribed quantity of the film 1 is fed from the cartridge 2 by two electric motors 20 and 30 as its driving sources and taken up around the take-up spool 3 side, afterwards, each frame of the film 1 is taken up by the take-up spool 3. Furthermore, a device is constituted such that the spool shaft of the cartridge 2 is rotated and thereby rewinding the film 1 into the cartridge 2 when photographing is completed. Namely, the first electric motor 20 is used as a driving source for feeding and rewinding the film. On the other hand, the film taking-up is carried out by the second motor, i.e., the electric motor 30 for taking up the film. Thus, the effective utilization of each space such as the upper and lower parts of an aperture and an efficiently disposed construction can be attained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention allows a film wound into a roll to be sent out from a delivery port by rotating a spool shaft in the delivery direction, and also to unwind the film. The present invention relates to a film feeding device in a camera loaded with a film cartridge configured to rewind the film by rotating it in the rewinding direction.

[Conventional technology]

A cylindrical part 2a has a spool shaft therein for storing photographic film in a rolled state, and a film feeding part 2b extends integrally in the tangential direction of the spool shaft to store the leading end of the film in a straight line. Film cartridge 2 consisting of
For example, a structure shown in US Pat. No. 4,832,275 has been proposed. Its schematic structure is shown in Figure @11. According to this cartridge 2, the spool shaft provided in the cylindrical gBZa is connected to the feeding direction of the film 1 by its shaft end (the spline portion indicated by 20 in the figure). By rotating the film 1 in the forward rotation direction (indicated by the solid arrow in the figure), the film 1 is sequentially fed out from the distal end side from the dispensing port at the distal end of the dispensing section 2b, and in the rewinding direction (indicated by the broken line arrow in the figure). By rotating the film 1 in the reverse direction (reverse direction), the film 1 can be rewound and its leading end can be wound into the delivery section 2b. Note that this example shows a case where perforations la and la are continuously provided at the upper and lower edge portions of the film 1, similar to the 135-inch film.

According to such a cartridge structure, the leading end of the film 1 is pulled into the cartridge 2 when loading it into the camera or winding it up and taking it out after shooting. Since this can be done automatically by rotationally driving the spool shaft with an electric motor or the like, the operator can easily handle the film 1, such as loading the film 1 into the camera very easily.

[Problem to be solved by the invention]

However, the structure of the camera into which this kind of film cartridge 2 can be loaded and its internal mechanism, especially how the film 1 is fed out of the cartridge 2, how it is wound frame by frame, and how it is rewound into the cartridge 2. There is no specific example disclosed yet, and it is desired that a camera equipped with a film feeding mechanism, winding mechanism, rewinding mechanism, etc., which can take advantage of the advantages of the cartridge structure as described above, be developed. .

In particular, what is required to configure this type of camera is the above-mentioned film feeding, winding and rewinding,
By making it possible to perform the operation using a film-driven am mechanism with a simple configuration using the minimum number of necessary components, it is also necessary to efficiently arrange each mechanical part and make the entire structure small and compact. It is also desired to be able to operate each mechanical part stably and reliably, and it is desired to take some measures that can satisfy all of these demands.

One of the problems with the film feeding device of such a camera is that the film cartridge and
There is a relationship between the drive system for feeding out the film 2 and the drive system for winding the film 1. In other words, the film feed drive system is
The film 1 is connected to the spool shaft side of the cartridge 2.
The film winding drive system is connected to the winding spool side and is driven by the winding of the leading edge of the film, applying a tensile force to the film 1 and winding the film 1 frame by frame. , these are connected via the spool shafts of the film 1 and the cartridge 2, and they rotate in the same direction, so it would be easier to drive them with the same rotational drive source, but the film 1 and the cartridge 2 are located on the opposite side. Operating together with the winding spool is
The arrangement structure tends to become complicated due to the relationship with the rewinding drive system.
It is desirable to drive with a separate drive source.

However, this method requires troublesome control such as appropriately controlling the drive timing of each drive system so that the drive systems do not interfere with each other, and the structure tends to become complicated. It is desired that the following points can be solved.

Furthermore, there is a problem in configuring the film 1 feeding drive system 1 winding drive system and rewinding drive system as described above. It is necessary to arrange the film to avoid the film path formed in the aperture portion, and there may be little space above or below the aperture, so these points must also be taken into consideration.

[Means to solve the problem]

In order to meet such demands, the camera film feeding device according to the present invention rotates the spool shaft of the film cartridge in both forward and reverse directions, thereby feeding the film out of the feeding port and feeding the film into the feeding port. The film meshes with an electric motor for feeding and rewinding the film, and a sun gear rotationally driven by the motor for feeding and rewinding the film, and swings between the first and second swinging positions. A planetary gear of a planetary gear mechanism to be operated, a rotation transmission gear for film feeding and film rewinding arranged to mesh with this planetary gear at first and second swing positions, and a rotation transmission gear for film feeding and film rewinding, and A film drive gear that is connected to the gear and the rewind gear and is driven to rotate in both forward and reverse directions to rotationally drive the spool shaft, a film winding spool for the film sent out from the cartridge, and a film winding gear that rotationally drives the film winding spool. This configuration includes an electric motor.

[Effect]

According to the present invention, as a rotation transmission system from the film feeding and rewinding motor to the feeding gear and rewinding gear connected to the film driving gear that drives the spool shaft of the cartridge 7, By using a sun gear as the motor side gear and a planetary gear constituting a planetary gear mechanism that is meshed with the sun gear and oscillates between the first and second oscillating positions, the planetary gear can be moved to the first oscillating position. At the swinging position, the drive gear is rotated in the forward direction in conjunction with the feeding gear to feed the film out of the cartridge, and at the second swinging position, the film is meshed with the full rewinding gear to rotate the drive gear. By rotating the film in the reverse direction, the film can be rewound into the cartridge. In particular, according to the present invention, the film feeding and rewinding drive system is independent of the film winding drive system, which is based on the winding motor that rotationally drives the winding spool disposed on the other side of the camera and its rotation transmission system. Since the camera is placed on one side, there is no need to bypass the upper or lower side of the camera's aperture to install a rotation transmission system, etc., allowing for effective use of space in each part and efficient layout. In addition, the film can be fed out, wound up, and rewound appropriately under the required conditions.

〔Example〕

1 to 84 show an embodiment of the film feeding device according to the present invention, and in these figures, the same parts as those in FIG. 11 described above are given the same numbers and the explanation will be omitted. Here, 3 in the figure indicates a cartridge 2 inside the camera body (not shown).
A film winding spool is provided facing each other on the left and right, and a perforation 1 on the film 1 side is formed on the outer periphery of the film winding spool.
A winding spool driving gear 4 is integrally provided, and a winding spool drive gear 4 is integrally provided to receive rotational transmission in the film winding direction during film winding.
wind and run in the feed direction.

A film feeding device, generally designated by the reference numeral 10, uses two electric motors 20 and 30 as driving sources to feed the film 1 from the cartridge 2 a predetermined amount of time.

After winding the film onto the winding spool 3 side, the winding spool 3 is used to wind the film 1 frame by frame, and at the end of shooting, the spool shaft of the cartridge 2 is rotated to wind the film 1 back into the cartridge 2. It is configured.

That is, the first electric motor 20 is used as a drive source for film feeding and film rewinding, and is connected to a rotation transmission gear train 21 for film feeding, which will be described later.
Alternatively, a film drive key 2 is engaged with a spline portion 2C for rotating the spool shaft of the cartridge 2 in both forward and reverse directions by a film rewinding rotation transmission gear train 22.
Rotation in the film feeding direction (forward rotation direction) or rewinding direction (reverse rotation direction) is transmitted to the film drive gear 23 having a diameter of 3 a and disposed at the terminal end of the gear train 21, 22, thereby It is used to feed the film 1 when the cartridge 2 is loaded into the camera and to rewind the film 1 after the photographing operation is completed. Drive key 23a
The figure shows a state in which the and spline portion 2c are not engaged, but in reality, the film drive key 23a side extends in the axial direction, as shown by the imaginary line in the figure, and the cartridge 2 is loaded into the camera. It is configured to engage with the spline portion 2C when the spline portion 2C is pressed.

Reference numeral 40 denotes a free sprocket serving as a means for detecting the amount of film movement, which is disposed so as to mesh with the upper bar fore line la when the film 1 is sent out from the delivery port of the cartridge 2, as shown in FIG. The amount of rotation of the sprocket 40 is used to detect the amount of feed of the film l. That is, a conductive pattern 41 is formed on the E surface of the sprocket 40, and a pair of brushes 42a and 42b come into contact with the pattern 41 and come out of contact with the pattern 41 as they rotate. The amount of rotation of the sprocket 40, that is, the amount of movement of the film 1 is detected.

Note that one brush 42a is always in contact with the pattern 41, and the other brush 42b is in contact with the pattern 41 on the sprocket 4.
If the arithmetic circuit detects and calculates the signal that turns the switch on and off by contacting each rotation of the
It is easy to understand that the amount of movement is required. In the illustrated example, a pulse is sent out for each rotation, but if the pattern shape is such that multiple pulses are sent out, Needless to say, it's a good thing.

Further, as shown in FIG. 2, the film 1 sent out from the cartridge 2 passes through the above-mentioned subblock 40, and then passes through a tunnel (not shown) consisting of inner and outer rails and a film pressure plate. A presser foot is fed through a well-known film path known as ``Film Pass'', passes through an aperture 43 that defines a photographic screen, reaches the outer periphery of the winding spool 3, and is biased by a spring (not shown). The roller 44 is configured to press the film 1 against the outer periphery of the spool 3. and.

This state is sensed by the detection means attached to the sprocket 40, and the film feeding and rewinding motor 20 is stopped!
F and move this winding spool 3 in the winding direction (
When rotated in the direction of the arrow shown by the imaginary line in FIG. 1 and the solid line in FIG.
The film 1 can be wound onto the spool 3 in sequence, and the film 1 travels in the direction of the arrow shown by the solid line in FIG.

Here, this winding spool 3 is connected to a rotation transmission gear train 31 by the second motor, that is, the electric motor 30 for film winding, and furthermore, a planetary gear mechanism 32 that selectively transmits rotation depending on the presence or absence of meshing at the terminal end of the gear train 31. The rotation is transmitted through the film winding rotation transmission gear train 33 to the driving gear 4 integrated with the spool 3.
A film winding operation is performed (see FIG. 3, etc.).

In addition, the determination as to whether or not the film l has been wound around the winding spool 3 and the amount of feed of the film l for each frame are determined by the conductor pattern 41 in the subblock 40 and the brush 42a.
, 42b is input to an arithmetic circuit to calculate the feed amount of the film 1.

On the other hand, film rewinding after shooting is accomplished by rotating the driving gear 23 in the opposite direction to the feeding direction, and using the film drive key 22a and spline section 2C to rotate the spool shaft in the opposite direction to the direction in which it was pushed out. Ru. Here, according to the present invention, the first motor 20 is used as a drive source for film feeding and rewinding, and this motor 20 is rotated in the opposite direction to the feeding time described above, as will be described later. The planetary gear mechanism 24 is shifted from the state shown in FIGS. 1 and 2 to the state shown in FIG. 4 by meshing with the film rewinding rotation transmission gear train 22, and the rotation from the motor 20 is connected to the spool shaft. The drive gear 23 rotates in the rewinding direction of the film, thereby rewinding the film.

Further, a planetary gear mechanism 24 is provided for selectively transmitting the rotation from the above-described film 1 feeding and rewinding motor 20 to the feeding gear train 21 and the rewinding gear train 22.
is a planetary gear 26 with the sun gear 25 as the gear at the end of the rotation transmission gear train on the motor 20 side (in this embodiment, it consists of only one gear that meshes with the motor shaft gear 20a), and the sun gear 25 has friction. The lever arm 27 is coaxially supported by a spring (not shown) or the like to provide frictional properties, and has a planetary gear 26 supported at its swing end. 27 swings in the same direction due to the rotation of the sun gear 25, so that the gear trains 21 and 22 on the feed side or the rewind side (actually mesh with the drive gear 23). One gear at a time 28.
29) selectively engages with the first or second swing position;
It is configured to transmit rotation in a required direction. Here, the rotational direction of the motor 20 and the meshing side of the planetary gear 26 refer to the feeding state shown in FIGS. 1 and 2 or the fourth state shown in FIGS.
As can be easily understood from the unwinding state shown in the figure, the above-mentioned meshing state during feeding and rewinding is maintained by maintaining the swinging position of the lever arm 27 by the rotation of the motor 20. . The planetary gear 26 swings between a first swing position shown in FIGS. 1 and 2 and a second swing position shown in FIG. As such, when rotation transmission is not necessary, it is configured to be held at a position where it does not mesh with the single gears 28 and 29.

Further, the planetary gear mechanism 32 selectively transmits the rotation of the film l from the winding motor 30 depending on whether or not it meshes with the winding gear train 33.
The gear at the end of the rotation transmission gear train 31 on the 0 side is the sun gear 34
A friction spring (
Lever arm 36 is coaxially supported with a frictional behavior caused by (not shown), etc., and supports a planetary gear 35 at its swinging end.
The planetary gear 35 engages with the winding side gear train 33 by swinging the lever arm 36 by the rotational force in the same direction as the sun gear 34 rotates. The configuration is such that the rotation is selectively transmitted in the winding direction. Here, the rotating direction of the motor 30 and the meshing side of the planetary gear 35 can be easily understood from the winding state shown in FIGS. 1 to 3 or the unwinding state shown in FIG. The meshing state at the time of winding is maintained by maintaining the swinging position of the lever arm 36 by the rotation of the motor 30.

According to this embodiment, in the film feeding 41110 having the above-described configuration, two systems of rotation transmission gear trains 21 and 22 are used to transmit rotation from the film feeding and rewinding motor 20 to the film driving gear 23. A swinging end of a swingable lever arm 27 which is provided midway and is coaxially supported with a sun gear 25 as the motor side gear and a frictional behavior given to the sun gear 25 by a friction spring (not shown) or the like. During film feeding, when the motor 20 rotates in the film feeding direction, the lever arm 27 applies a rotational force in the same direction as the sun gear 25 rotates. Then, the driven gear 28 on the feed side gear train 21 side, which transmits rotation to the film drive gear 23, is oscillated so as to mesh at the first oscillation position, and when the feeding of the film 1 is completed, the motor When the film 1 is wound onto the take-up spool 3 with the film drive gear 20 stopped, the rotation of the film drive gear 23 causes the motor side gear (sun gear 25 or the gear 20 that meshes with the sun gear 25
The structure is such that it swings in the direction of disengaging due to the rotational difference with a).

In other words, the motor 20! $1 When the lever arm 2 rotates in the direction of the arrow shown by the solid line in the figure, the lever arm 2 rotates as the sun gear 25 rotates.
7, the planetary gear 26 meshes with the driven gear 28 as shown in FIGS. 1 and 2, and this state is maintained, and the driving gear 23 is rotated in the film feeding direction, thereby moving the cartridge. Two pieces of film 1 are fed out, and the amount of film 1 fed out is sequentially detected by the detection means of the subblock 40, and the leading edge of the film 1 reaches the outer periphery of the winding spool 3 and is wound. The point in time when the attachment is possible is detected, and the sending,
The rotation of the rewinding motor 20 is stopped, and the winding side is rotationally driven by the motor 30 as described above.

At the start of this film winding operation, when the feed motor 20 is stopped and the winding side motor 30 rotates, the winding spool 3 is rotated in the winding direction.
The film feeding drive system and the film winding drive system, which are in the positional relationship shown in FIGS. 1 and 2, are in the following state. That is, a tensile force acts on the film l wound around the take-up spool 3 and taken up as the spool 3 rotates, and this causes the spool shaft inside the cartridge 2 to move as the spool shaft rotates as the spool 3 rotates. rotated. The rotation of the spool shaft causes the drive gear 23 to rotate in the film feeding direction, and the driven gear 28 also rotates as shown by the solid line in FIG. In this state, since the feed/rewind motor 20 is stopped, the planetary gear 26 is rotated as indicated by the arrow in FIG. 2 due to the rotation difference between the driven gear 28 and the motor gear 25.20a. The lever arm 27 automatically moves in the direction of disengaging the mesh, and stops at a position where it does not mesh with the driven gear 28, and then the drive gear 23 starts rotating and the rewind motor 20 is turned off. It moves to release. This state is the positional relationship shown in FIG. 3, and it is easy to understand that the film winding as described above is performed sequentially.
gear train 2 so as not to mesh with the driven gear 29 on the second side
The installation position on the second side is set.

According to such a configuration, the feeding and rewinding motor 20 and the drive gear 23 are used when feeding and winding the film 1.
The rotation transmission gear train 21° 22 between the planetary gear mechanism 2 and
4, the planetary gear 26 is automatically connected and disconnected by the rotation from the motor 20 side and the rotation from the drive gear 23, so the configuration is simple.
It is possible to drive both drive systems in the required state without requiring complicated control, and its advantage is obvious.

Furthermore, according to the device of this embodiment, in the above-described configuration,
After the sprocket 40 detects that the film l has been wound up to a predetermined number of sheets and photography has been completed, the motor 20 is controlled so that the rotation is reversed from the direction of the solid arrow in FIG. 1 to the direction of the arrow shown by the broken line in FIG. 3. As a result, the planetary gear mechanism 24 is switched from the film winding state shown in FIG. 3 to the film rewinding state shown in FIG. That is, the planetary gear 2 of this planetary gear mechanism 24
6 swings to a second swinging position so as to mesh with the driven gear 29 of the film rewinding gear train 22 connected to the film driving gear 23, and in the rewinding direction from the motor 20. The rotation of the film l is transmitted to the drive gear 23, thereby rewinding the film l into the cartridge 2.

When the sprocket 40 is no longer engaged with the perforation 1a of the film 1 due to rewinding of the film l, the on/off pulse signal from the switch cannot be detected, and the rewinding state of the film to the tin rocket 40 position is interrupted. be sensed. From this state, motor 2
The rewinding operation is completed by continuing to rotate the motor 20 for a certain period of time and stopping the motor 20 at a time when the film l is surely rewound into the cartridge 2.

Incidentally, after the film winding operation is completed, the planetary gear 35 of the planetary gear mechanism 32 on the winding motor 30 side may occasionally mesh with the winding gear train 33 side. If this occurs, motor 2
0 in the rewinding direction, the film 1 is rewinded, and as a result, the spool 3 is rotated in the opposite direction to the winding direction to perform rewinding.
The rotation of the lever arm 36 of the sun gear 34 in the direction that causes the planet gear 35 to swing in the direction in which the planet gear 35 is in mesh is transmitted to the planet gear 35. The rotation is transmitted to the motor 3o via the sun gear 34 and the gear train 31, causing trouble in the rewinding operation.

That is, in this case, since the motor 30 is rotated by an external force and acts as a generator, it becomes a load on the motor 20 side, so to avoid this, before rotating the motor 20 in the rewinding direction, It is preferable to reverse the winding motor 30 in advance and displace the planetary gear 35 to a non-meshing state.

And in such a configuration, two motors 20.30
Using this, the feeding, winding, and rewinding operations of the film from the cartridge 2 (7) can be carried out appropriately and reliably, and its advantages are obvious.

In particular, according to the invention, the two motors 20.3 mentioned above
The rotation from 0 is configured to be transmitted only to the gear train placed near each motor 20 and 30, bypassing the aperture 43 facing the photographing optical system in the center of the camera body, and transmitting the rotation to the upper side thereof. There is no need to install a gear train that transmits rotation to the side where the other motor is located through the lower side of the motor, and the film drive system in the camera is advantageous in terms of space and is also highly efficient. It is possible to obtain the structure.

Here, the drive circuit and operation sequence in the film feeding device 10 having the above-described configuration will be briefly explained using FIGS. 5 to 10.

That is, FIG. 5 is a circuit block diagram for performing each operation, and in the figure, 60 is a microcomputer (hereinafter referred to as CPU), 61 is a battery for power supply, and 62 is a circuit for inserting the cartridge 2 into the camera. a cartridge detection switch that detects loading in conjunction with the operation of a detection member (not shown); 63 is a cartridge lid detection switch that is turned on by a detection member (both not shown) that operates when the cartridge lid is closed after the cartridge 2 is loaded; Reference numeral 64 denotes a release switch that is turned on when a release button (not shown) is pressed, and 65 is a manual rewind switch that is turned on when a manual rewind button (not shown) is pressed.These switches 62 to 65 are , are connected to input ports 1 to 1 of the CPU 60, respectively.

Reference numerals 66 and 67 are motor control circuits that control the rotation and stop of the aforementioned feed and rewind motors 20 and winding motors 3o, respectively, and output ports 0, 02 of the CPU 60
;Connected to 03.04. Note that each of these motors 20.30 rotates in the normal rotation direction (film feeding direction 1 winding direction) when only one boat (Os, 03) is at a high level, and the other boat (o2. The boat is configured to be rotated in the reverse direction (film rewinding direction, etc.) when only the boat 0 becomes a high level, and to be stopped when both boats become a low level.

68 is a conductor pattern 41 and a brush 42a that are turned on and off in conjunction with the sprocket 40;

A counter for counting the output pulses of the film movement detection switch 69 consisting of 42b outputs the count value to the CPU 60 and resets the count value in response to a command from the CPU 60. Note that 70 is a pull-up resistor that pulls up the brush 42b, which is one end of the switch 69 that contacts or does not contact the conductive pattern 41, to the battery 61, and this brush 42b is also connected to the counter 68 side.

Reference numeral 71 denotes an exposure control device such as a camera shutter, an aperture, or an aperture control device, and controls the shutter speed and aperture in response to instructions from the CPU 60.

In this circuit configuration, when the battery 61 is loaded into the camera, the program starts.

As is clear from FIG. 6, the loading of the cartridge 2 into the camera is confirmed by turning on and off the cartridge detection switch 62 (step 101). When the closed state of the lid is confirmed by the cartridge lid detection switch 63, the film 1 is fed out from the cartridge 2 by the film feeding drive system mentioned above in the step 2 block 103.

The details of this film feeding step 103 are explained in the seventh section.
In step 201, the motor 20 starts rotating in the forward rotation direction (feeding direction) via the motor control circuit 66 as shown in FIG. Step 20 in the primary that performs sending
At step 2, the pulse signal from the switch 69 accompanying the rotation of the sprocket 40 is integrated by the counter 68 to calculate the feed amount of the film 1, and the film l is fed by a predetermined amount to reach the winding spool 3. When a predetermined delivery amount is reached, in step 203, C is
The motor 20 is stopped by a command from the PU 60, and film feeding is stopped. Then, in step 204, the count value of the counter 68 is reset to zero, and then the process returns to the main program, and the process moves to step 104 in FIG.

In step 104, the winding spool 3 of the camera is rotated to wind the film l onto the spool 3. The details of this are shown in FIG. 8, where step 301
In response to a command from the CPU 60, the motor 30 is rotated forward in the winding direction by the motor control circuit 67, and the film l is wound around the spool 3. In step 302, it is determined whether the predetermined amount of winding has been reached or not, in the same manner as described above. Confirm with the counter 68, and stop the motor 30 when the determination is made (
At step 303), the counter 68 is reset to zero (step 304), and the process returns to the main side and proceeds to step 105.

At step 105, it is confirmed that the rewind manual switch 64 is turned off, and if it is determined that there is no rewind instruction, the process proceeds to step 106.In step 106, it is determined whether or not there is a release operation (photography instruction). At the same time, in step 107, the shutter speed and aperture diameter are calculated by introducing the film sensitivity from a film sensitivity setting device (not shown), the subject brightness from a subject brightness detection device (not shown), and the fog control device 71 is controlled. After a series of photographs have been taken, the film is wound frame by frame in step 108. The details are shown in FIG.

That is, film winding is performed in step 401 in FIG.
Then, the CPU 60 rotates the motor 30 in the normal direction and rotates the spool 3.
This is done by rotating.

Then, it is determined in step 402 that the amount of movement of the film 1 is equal to -frames, the motor 30 is stopped in step 403, and the counter is reset in step 404.
The camera returns to , and the photographing procedure is repeated frame by frame.

On the other hand, when the rewinding instruction is confirmed in step 105, the film l wound on the spool 3 is rewound into the cartridge 2 in step 109, and when this rewinding is completed, the cartridge loading is opened (step 110).
) and step 111) are both determined to confirm that the cartridge 2 is removed.
Return to step 101 at the beginning.

Here, the details of the above-mentioned film rewinding are shown in Fig. 1θ. First, in steps 501 to 506, time counting is started to measure the reversal time of the winding motor 30, and the motor 30 is moved in the rewinding direction. After determining that the time has elapsed to ensure that the planetary gear 35 on the winding side is disconnected during the reverse rotation, the motor 30 is stopped, the timer is stopped, and the counter is reset.

Next, as shown in steps 507 to 511, the film feeding/rewinding motor 20 starts to rotate in reverse, and a timer for determining film movement is started. Check and when you are on the move.

After resetting the count value to zero and stopping time measurement, the process returns to step 508 to start time measurement.

On the other hand, when the count value is 0 in the stay sprocket 409, the sprocket 4
After securing the time for taking the film from the position into the cartridge 2 by the elapse of the measured time, steps 513 to
As shown in step 515, the motor 20 is stopped, the counter is reset, and the timer is stopped, and the process returns to step 110 of the main program. It will be easily understood that this completes the rewinding of the film 1 into the cartridge 2.

It should be noted that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part, including the structure of the film feeding device 10, may be modified or changed as appropriate, and various modifications may be made. It may be considered that even if If, in the example described,
The film 1 is fed from the cartridge 2 loaded in the camera onto the winding spool 3, and wound onto the spool 3, and is wound onto the spool 3, frame by frame, without preceding the shooting operation. Although a general film feeding method has been described in which the film 1 is rewound into the cartridge 2 by rotating the side spool shaft, the present invention is not limited to this. It will be easily understood that this can also be applied to the case of a film feeding method in which the film is once wound onto the winding spool 3 side, and then taken up frame by frame into the cartridge 2 along with the photographing operation. The first motor 20 is used as a drive source for feeding the film and winding the film frame by frame, and the second motor 30 is used for winding the film onto the winding spool 3 when the cartridge 2 is loaded. It functions as a drive source, and although its operating order and component names of each part are slightly different from those of the above-mentioned embodiment, there is no change in structure.
This can be easily understood by considering the feeding direction of the film 1 and the functions of each part.

〔Effect of the invention〕

As explained above, according to the film feeding device according to the present invention, by rotating the spool shaft of the cartridge in both the forward and reverse directions, the film can be fed out of the feeding port and rewound into the feeding port. An electric motor for film feeding and rewinding, and a planetary gear that is engaged with a sun gear rotationally driven by the film feeding and rewinding motor and is oscillated between first and second oscillating positions. A planetary gear of the mechanism, a rotation transmission gear for film feeding and film rewinding arranged to mesh with the planetary gear at first and second rocking positions, and these feeding gears and film rewinding gears. a film drive gear connected to the gear and driven to rotate in both forward and reverse directions to drive the spool shaft; a film winding spool for the film fed out from the cartridge; and a film winding electric motor for rotationally driving the film winding spool. Because of this configuration, despite the simple configuration, various excellent effects listed below can be achieved.

■As a rotation transmission system from the film feed and rewind motor to the feed gear and rewind gear connected to the film drive gear that drives the spool shaft of the cartridge, the motor side gear is set to full sun and Engage with this @
Using a planetary gear constituting a planetary gear mechanism that is oscillated between the first and second oscillating positions, the planetary gear is oscillated between the first and second oscillating positions.
By meshing with the feed gear and rewind gear at the second swing position, the drive gear can be rotated in the forward direction to feed the film out of the cartridge, or the drive gear can be rotated in the reverse direction. This allows the film to be rewound properly and reliably into the cartridge.

■The film feeding and rewinding drive system is arranged on one side of the camera independently of the film winding drive system, which is made up of a winding motor and its rotation transmission system that rotate the winding spool located on the other side of the camera. There is no need to bypass the upper or lower sides of the camera aperture to install a rotation transmission system, etc., and the space in each part, including the upper and lower parts of the aperture, can be used effectively. It becomes possible to obtain an arrangement structure with good utilization and efficiency.

■By simply installing separate motors and their rotation transmission systems on both sides of the camera, the film can be fed and rewound by rotating the spool shaft in the cartridge in both forward and reverse directions.
Further, by rotating the winding spool, the film can be wound in the desired condition.

[Brief explanation of drawings]

1 to 4 are schematic perspective views of the main components of an embodiment of the film feeding device according to the present invention, and FIG. 1 shows the operating state during film feeding, and FIG. Fig. 3 is a diagram for explaining the operating state during film winding, Fig. 4 is a diagram for explaining the operating state during film rewinding, Fig. 5 is a circuit block diagram for operating the device, and Figs.
io is a flowchart for explaining the operation of the apparatus, and FIG. 11 is a schematic perspective view of a film cartridge used in the present invention. ■・・・Film, 2...Film cart 7
Ji, 2C...Spline part (spool shaft), 3...
... Winding spool, 4... Drive gear, 10...
...Film feeding device, 20...Film feeding,
Electric motor for rewinding, 21...Rotation transmission gear train for film feeding, 22...Rotation transmission gear train for film rewinding, 23...Gear for driving film, 24...
・Planetary gear mechanism, 25...Sun gear, 26...
tt star gear, 27... lever arm, 28... driven gear on the film feeding side, 29... driven gear on the film rewinding side, 30-... electric motor for film winding, 31 .33... Rotation transmission gear train for film winding, 32... Planetary gear mechanism, 40... Free sprocket for film feed amount detection, 43... Aperture.

Claims (1)

[Scope of Claims] A camera loaded with a film cartridge capable of feeding the film out of the feeding port and rewinding the film into the feeding port by rotating the spool shaft in both forward and reverse directions. , an electric motor for film feeding and rewinding that can transmit rotational force in both reverse directions, a sun gear rotationally driven by the electric motor for film feeding and rewinding, and a sun gear that is meshed with the sun gear. a planetary gear mechanism including a planetary gear that is oscillated between a first oscillation position and a second oscillation position; and a film feeder arranged to mesh with the planetary gear at the first oscillation position. a rotation transmission gear for film rewinding arranged to mesh with the planetary gear at a second swing position, and a rotation transmission means that engages with the spool shaft when loading the cartridge; a film driving gear connected to a film feeding rotation transmission gear and a film rewinding rotation transmission gear and driven to rotate in both forward and reverse directions; a winding spool around which the film fed from the cartridge is wound; and a film winding electric motor that rotationally drives the winding spool, and the planetary gear meshes with the film feeding rotation transmission gear at the first swing position, and the film driving gear rotates in the forward rotation direction. As a result, the film is sent out from the cartridge, and the planetary gear meshes with the film rewind rotation transmission gear at the second swing position, and the film drive gear is rotated in the reverse direction, thereby sending the film out of the cartridge. A film feeding device for a camera, characterized in that the film feeding device is configured to be rewound within the camera.