JP2004115202A - Film feeding device and optical device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-type film feeding device and an optical device using the same capable of power-switching even to a movable drive part such as a lens barrel other than film feeding while satisfying film feeding capacity in a film feeding means using a cartridge in which the film is completely wound up in advance. <P>SOLUTION: The device has a film winding-up shaft and drive force from driving source, and is provided with a first planetary gear transmitting the drive force to the film winding-up shaft, and a second planetary gear transmitting the drive force to the film winding-up shaft or the other movable means such as the lens barrel in the film cartridge. The device is always connected with a drive force transmission route from the first planetary gear to the second planetary gear, and the drive force is transmitted from the planetary gear to the second planetary gear. The center of revolution of the first planetary gear and the second planetary gear is approximately coaxial. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a film feeding device and an optical device using the same.
[0002]
[Prior art]
In recent years, a film cartridge in which a film is previously wound in a cartridge in an initial state has been proposed and put to practical use.
[0003]
In order to realize a smooth film winding drive and a film rewinding drive using the above-mentioned cartridge, the film winding driving force is transmitted to the winding shaft when the film is wound, and the film winding shaft is conveyed to the film winding shaft when the film is rewound. It is desirable that the film winding shaft can be freely rotated without transmitting power. Therefore, there have been proposed some small film feeding apparatuses that satisfy the above-mentioned problems.
[0004]
In Japanese Patent Application No. 10-249627, the winding drive up to the film winding shaft gear is efficiently performed by three steps of reduction. Further, power transmission to the thrust drive system is performed by using a hoisting shaft gear as an idler gear and outputting and outputting from an output gear that meshes with the hoisting shaft gear only when hoisting. Also, since the output gear is a planetary gear, it receives the force flipped by the winding shaft gear during the film winding drive, but the output gear is switched so that the output gear is locked so that it does not escape from the winding shaft gear. A member is provided. The switching holding member is composed of a dedicated sun gear using a rotating force of the hoisting shaft gear and a planetary plate. Further, in order to freely rotate the winding shaft when the film is rewound, the engagement between the output gear and the winding shaft gear is cut off. For this purpose, the operation of releasing the locking of the output gear of the switching holding member and the operation of retracting the output gear itself from the hoisting gear are performed in time series.
[0005]
In Japanese Patent Application No. 10-348399, the winding drive up to the film winding shaft gear is efficiently performed by two-stage deceleration.
[0006]
Specifically, a large reduction gear, whose rotation center does not change, is connected to a pinion gear receiving the output of the motor. Furthermore, a film winding shaft drive gear is connected to the small gear of the reduction gear, and a -direction clutch that meshes only when film is wound is interposed between the film winding shaft drive gear and the film winding shaft. . Further, power transmission to the thrust drive system is performed by using a hoisting shaft gear as an idler gear and outputting and outputting from an output gear that meshes with the hoisting shaft gear only when hoisting. On the other hand, since the film winding shaft rotates freely during film rewinding, the film winding shaft rotation speed due to the film tension caused by the rewinding drive is set to be always lower than the film rewinding rotation speed of the film winding shaft drive gear. I always try to disengage the clutch.
[0007]
[Problems to be solved by the invention]
However, in Japanese Patent Application No. 10-249627, a dedicated switching means is used to hold an output gear for transmitting power to a thrust drive system, even though only the film feeding drive is performed. The number of parts increases, which leads to an increase in cost. Further, due to the mechanism of the switching means, there arises a problem that a desired operation cannot be performed with respect to vibration or drop during switching control.
[0008]
Also, Japanese Patent Application No. 10-348399 is an effective proposal when only the film feeding drive is performed. However, the motor and the reduction gear are shared with other movable means such as a lens barrel, so that parts can be shared. Problems occur when miniaturization is aimed at. For example, assuming that the film feeding drive and the lens barrel drive are switched, the feeding operation and the lens barrel operation are independent of each other, and there should be no unnecessary interlocking simultaneous drive. For this purpose, a power switching mechanism is placed somewhere in the driving force transmission path to the film winding shaft drive gear, transmitting power to the film winding drive shaft during film feeding and power transmission during lens barrel driving. It is necessary to switch the end and transmit power to the lens barrel without transmitting power to the film winding drive shaft. In Japanese Patent Application No. Hei 10-348399, the film winding shaft is driven with an extremely small number of gear stages of two. Therefore, in order to obtain the required reduction ratio in two stages, the reduction gear and the film winding shaft drive gear necessarily increase in size. If the power of this reduction gear is switched using, for example, only a planetary gear mechanism, a huge reduction gear revolves, and the reduction unit becomes large. Also, in order to use the reduced gear output commonly for film feeding and lens barrel drive without reducing the gear output, the other gear on the lens barrel drive side that meshes with the small gear of the reduction gear is also a huge gear about the film winding shaft drive gear. It is not realistic. Therefore, while maintaining the miniaturization factor of Japanese Patent Application No. 10-348399, miniaturization cannot be maintained by sharing the power between the film feeding and the movable means such as the lens barrel.
[0009]
[Means for Solving the Problems]
In the present application, by adopting the configuration of the first claim, the first planetary gear transmits power to the film winding shaft only at the time of film winding, and on the other hand, the power switching means for constantly outputting to the second planetary gear. Plays a role. The first planetary gear also functions as a reduction gear that is connected only to the film winding shaft drive side during the winding drive, and is also constantly connected to the second planetary gear that performs thrust drive or lens barrel drive. Also works as a gear. Therefore, the first planetary gears share the reduction gear train for each power transmission destination, and transmit the substantially reduced output. Further, since the revolving center of the first planetary gear and the second planetary gear can be shared, the required space of the power switching device itself including the planetary gear revolving drive space is integrated at one place and is reduced.
[0010]
With the configuration of the second claim, when the second planetary gear changes the driving force transmission destination to a movable means such as feeding or a lens barrel, the second planetary gear revolves according to the driving conditions of each driving destination. It is regulated by the possible angle. That is, in the lens barrel driving, the revolvable angle during lens barrel driving is small so that the second planetary gear driven by the lens barrel does not escape by the load in order to enable the lens barrel driving regardless of the lens barrel load fluctuation. Conversely, in the case of thrust feeding by the second planetary gear, it is necessary to cause the second planetary gear to be flipped off by the film tension due to the incense from the thrust drive to the hoisting drive. The revolvable angle of the middle second planetary gear is large. By performing the second planetary gear revolving angle regulation in accordance with the driving force transmission destination condition in this way, smooth driving is realized, and the role of an absorbing mechanism when excessive power is applied also comes to play.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present application is a film feeding apparatus that switches power between film feeding and lens barrel driving by using one motor as a driving source, and an optical apparatus using the same.
[0012]
(Film winding thrust drive)
FIG. 1 is a schematic perspective view of the optical device of the present embodiment in a film winding thrust driving state. FIG. 1A shows a feed driving mechanism, and FIG. 1B shows a lens barrel driving mechanism. FIG. 2 is a perspective view of the lower surface of the optical device of the present embodiment in a film winding thrust driving state.
[0013]
1 and 2, reference numeral 1 denotes a film cartridge having a photographic film take-up shaft (not shown), 2 denotes a photographic film, 2a denotes perforation, and 3 denotes a fork 3a which engages with a film take-up shaft in the cartridge (not shown). 4 is a cartridge chamber lid having a fork gear 3 therein, 5 is a cart chamber lid completion detection switch for detecting the completion of closing of the cartridge chamber lid 4 and transmitting detection information to the control means 7. Is a cartridge loading completion detection switch for detecting that the cartridge has been completely loaded into the cartridge chamber for storing the cartridge in the optical device and transmitting detection information to the control means 7; Film position detection that detects the position of the film and transmits the film position detection information to the control means. A photo reflector is a means.
[0014]
9 is a motor driven and controlled by the control means 7, 10 is a pinion gear integrated with the motor output shaft, 11 is a first sun gear, meshes a large gear 11a with the pinion gear 10, and connects a small gear 11b to a first planetary gear. And 12 large gears 12a. The first planetary gear 12 is responsible for driving film winding. The first planetary gear 12 is held by a first planetary plate 15 that revolves around the first sun gear 11, is rotatably engaged with the planetary shaft 16, and revolves by the elastic force of the planetary spring 17. It has gained. The first small gear portion 12b of the first planetary gear 12 is connected to the film winding shaft gear 13a to transmit driving force. An elastic rubber 14 is wound around the outer periphery of the film winding shaft 13. The film is pressed by the elastic rubber by a film pressing means (not shown), and the film is wound up by a frictional force between the rubber and the film and a shaft rotating force. The second small gear 12 of the first planetary gear 12 always meshes with the second sun gear 21. The second sun gear 18 is coaxial with the first sun gear and can be independently rotated. The second sun gear 18 always meshes with the second planetary gear 19. The second planetary gear 19 is responsible for film thrust feeding drive and lens barrel drive. The second planetary gear 19 is held by a second planetary plate 21 that revolves around the second sun gear 18, is rotatably engaged with the planetary shaft 22, and revolves by the elastic force of the planetary spring 23. It has gained. The third planetary gear 35 illustrated in FIG. 2 also meshes with the second sun gear 18 and is held by the second planetary plate 21, and interlocks with the revolving drive of the second planetary gear 19. The third planetary gear 35 is in charge of rewinding the film. 1 and 2, the second planetary gear 19 meshes with the output gear 20 and transmits the output to the fork gear 3 to feed the film from the film cartridge in the thrust direction. Not engaged. Reference numeral 25 denotes a planetary plate position detecting brush switch for detecting the revolving position of the second planetary plate 21, which is provided integrally with and interlocked with the second planetary plate 21. Reference numeral 26 denotes a substrate having a conductive pattern for detecting the position of the brush switch. In the state shown in FIGS. 1 and 2, the film winding thrust feeding position is detected, and the detection information is transmitted to the control means 7.
[0015]
Reference numeral 27 denotes a locking lever of the second planetary plate 15, which restricts the revolution of the second planetary plate by the locking portion 27 a jumping into the locking concave portion 21 a of the second planetary plate 21. The locking lever 27 immediately starts power switching drive in order to prepare for rotatable drive on a gear base plate (not shown). In FIGS. 3 and 4, the motor 9 starts to rotate clockwise, which is opposite to that during the film winding drive. The first sun gear 11 meshing with the pinion gear 10 starts rotating counterclockwise, and the first planetary gear 12 also starts revolving counterclockwise. The first planetary gear 12 is disconnected from the film winding shaft drive gear 13a, and the orbital motion stops when the first planetary plate 15 comes into contact with the projection 24 provided on the gear base plate shown in the figure. Even while the first planetary gear 12 is revolving, the second small gear portion 12c always meshes with the second sun gear 18 and continuously transmits power to the second and third planetary gears. The second planetary plate 21 revolves in the counterclockwise direction by the frictional force of the planetary spring 23. During the revolving motion of the second planetary plate 21, the locking portion 21a urges the end face of the second planetary plate 21 weakly by the biasing spring 29, but the revolving force of the second planetary plate 21 is larger, so the locking portion 27a is It slides on the end face of the second planetary plate 21 during the orbital motion. Also, the power supply to the plunger drive unit 30 is not energized during the power switching drive. When the second planetary gear 19 comes to a position where the second planetary gear 19 meshes with the lens barrel driving gear 31, the brush switch 25, which is the second planetary plate position detecting means, detects the lens barrel driving position pattern from the base 26, and controls the detection information. 7, and the power switching drive by the motor 9 is completed. At the moment when the second planetary gear meshes with the lens barrel driving gear 31, the locking part 27a jumps into the locking recessed part 21a of the second planetary plate 21, and the second planetary gear 21 is driven while the lens barrel is being driven and while the lens barrel is being driven. The orbital movement of is completely regulated. The optical device is in a state of waiting for pressing of the release switch 36 when the power switching drive ends.
[0016]
When the release switch 36 is pressed, the motor 9 is driven clockwise again, and the linear sensor 34 is moved to the desired lens barrel extension position based on the object distance information obtained by AF means (not shown). It drives out while detecting. The lens barrel drive is transmitted to the lens barrel 33 via the first planetary gear 12, the second sun gear 18, the second planetary gear 19, the lens barrel drive gear 31, and the transmission gear 32. Even after the power is switched to the lens barrel driving side, the reduction gear of the first planetary gear 12 operates in the same manner as in the film winding drive, which is useful for driving the lens barrel. When it is detected that the lens barrel 33 has been extended to a desired position, the detection information is transmitted to the control means 7, and the driving of the lens barrel 33 by the motor 9 is completed. Further, a photographing operation is performed for a desired exposure time by a shutter or an aperture provided in a lens barrel (not shown).
[0017]
(Lens barrel return drive)
5A and 5B are schematic perspective views of the optical device of the present embodiment in a lens barrel return driving state. FIG. 5A illustrates a feed driving mechanism, and FIG. 5B illustrates a lens barrel driving mechanism. FIG. 6 is a bottom perspective view of the optical device of the present embodiment in a lens barrel return driving state.
[0018]
In FIGS. 5 and 6, driving for returning the lens barrel after the photographing operation to the lens barrel drive initial position is started. When the motor 9 starts rotating counterclockwise upon detecting the end of the photographing operation, the first planetary gear also starts revolving clockwise. However, since the first planetary plate 15 abuts on the protrusion 21b provided on the second planetary plate 21, the first small gear portion 12b of the first planetary gear 12 revolves at a position where it does not mesh with the film winding shaft drive gear 13a. Exercise is regulated. Further, a brush switch 25 serving as a second planetary plate position detecting means detects a lens barrel return driving position detecting pattern from the base 26, and the detection information is transmitted to the control means 7. Even during the lens barrel return drive, the locking portion 27a keeps locking the locking recess 21a without driving the plunger driving portion 30. When the initial position of the lens barrel 33 is detected by the linear sensor 34, the detection information is transmitted to the control means 7, and the lens barrel return driving by the motor 9 is completed.
[0019]
Next, in order to wind the film to the next photographing position, power switching drive from the lens barrel driving position to the film winding position is performed. Specifically, the state shown in FIGS. 5 and 6 is switched to the state shown in FIGS. First, power is supplied to the plunger driving unit, and the plunger 28 generates an electromagnetic force in the direction opposite to the bias of the biasing spring 29. The holding portion 27b is urged rightward in FIG. 6 to rotate the locking lever 27, and the locking portion 27a releases the locking of the locking recess 21a. When the motor 9 is further rotated in the counterclockwise direction, the first planetary plate 15 and the second planetary plate 21 start revolving clockwise. When the second planetary gear 19 comes to a position where it meshes with the output gear 20, the brush switch 25 detects the film winding position detection pattern on the base 26, terminates the energization of the plunger drive unit 30, and starts the first planetary gear. The small gear 12b also meshes with the film winding shaft drive gear 13a, and the motor 9 completes the power switching drive and enters the state shown in FIGS. At the same time, the film winding thrust drive is performed without stopping the motor drive from the power switching drive while maintaining the counterclockwise rotation drive, and the motor drive is terminated when the film reaches a predetermined position. From the start of the power switching to the end of the film winding, the motor driving can be performed in the same direction without stopping the motor drive, and the film winding can be driven in the same direction. In the embodiment, in order to reduce the releasing force of the engaging portion 27a of the plunger, the operation of the plunger driving portion 30 is performed with the power supply for switching the power of the motor 9 turned off. When the power is strong, the motor 9 may be kept energized in the same rotation direction from the lens barrel return energization to the power switching energization to the film winding energization.
[0020]
(Film rewind drive)
7A and 7B are schematic perspective views of the optical device of the present embodiment in a film rewind driving state. FIG. 7A illustrates a feed driving mechanism, and FIG. 7B illustrates a lens barrel driving mechanism. FIG. 8 is a bottom perspective view of the optical device of this embodiment in a film rewind driving state. That is, FIGS. 7 and 8 show the state after the power is switched from the lens barrel return drive of FIGS. 5 and 6 to the film rewind drive.
[0021]
If the control means 7 determines that there is no film that can be photographed after the lens barrel return drive in FIGS. 5 and 6, power is immediately supplied to prepare for the film rewind drive at the connection position shown in FIGS. Start switching drive. First, power is supplied to the plunger driving unit, and the plunger 28 generates an electromagnetic force in the direction opposite to the bias of the biasing spring 29. The holding portion 27b is urged rightward in FIG. 6 to rotate the locking lever 27, and the locking portion 27a releases the locking of the locking recess 21a. Further, when the motor 9 starts to rotate clockwise, which is opposite to that during the lens barrel return driving, the first planetary plate 15 and the second planetary plate 21 start revolving in the counterclockwise direction. When the third planetary gear 35 comes to a position where it meshes with the output gear 20, the brush switch 25 detects the film rewinding position detection pattern on the base 26, terminates the energization of the plunger driving unit 30, and the first planetary plate 15 also It contacts the projection 24 and also the second planetary plate projection 21b, and the revolving motion is regulated. The motor 9 completes the power switching drive and enters the state shown in FIGS. At the same time, the film rewinding drive is performed while the clockwise rotation is maintained without stopping the motor drive from the power switching drive. When the film reaches a predetermined position where the film is completely rewound into the cartridge, the motor drive is finished. From the start of the power switching to the end of the film rewinding drive, the film rewinding drive can be performed in the same direction without stopping the motor drive, so that the power can be switched smoothly in a short time.
[0022]
FIG. 9 is an electric block diagram of the present embodiment. The part numbers in FIG. 9 and the common numbers in FIG. 1 to FIG. 8 serve the same function, and the description is omitted. The control means 7 is supported by the microcomputer 3, and rotates in a direction in which the plunger engaging portion 27 b is engaged with the plunger 28 and the end face of the second planetary plate 21 is pressed by the urging force of the urging spring 29. ing. The drive of the plunger drive section 30 is controlled by the control means 7, and in the energized state, the locking section 27a of the locking lever 27 is driven in a direction to release the locking of the second planetary plate locking recess 21a. The reason why the locking portion 27a is not in contact with the end surface of the second planetary plate 21 in the film winding thrust driving state in FIG. 1 is to clarify that the locking recess 21a is not locked for convenience. Actually, as shown in FIG. 2, the locking portion 27a is in contact with the end face of the second planetary plate 21 with a weak biasing force of the biasing spring 29, which is a biasing force that hinders the revolution of the second planetary plate. Absent. Also, in FIG. 1, the restricting means such as the locking lever 27, the plunger 28, and the plunger drive unit 30 are arranged at substantially the same height as the series of power switching mechanisms and beside the series of power switching mechanisms. It is the figure which was developed in order to make it easy to see. Actually, the restricting means is almost the same height as the series of power switching mechanisms, but is arranged on the front of the series of power switching mechanisms as shown in FIG. That is, the power switching mechanism and the restricting means are accommodated in a centralized space that is substantially accommodated in the lower surface of the film winding shaft gear.
[0023]
In FIG. 1B, reference numeral 31 denotes a lens barrel driving gear, and the large gear 31a is at a position where it meshes with the second planetary gear 19, but does not mesh during the film feeding driving. A worm 31b meshes with a transmission gear 32, which is a bevel gear. A lens barrel 33 is driven by the driving force from the transmission gear 32. Although devices (not shown) necessary for photographing, such as a shutter, a lens, and an aperture, are provided inside the lens barrel 33, the description is omitted because it is not directly related to the present embodiment. Numeral 34 denotes a linear sensor which is a lens barrel position detecting means for detecting an absolute position of the lens barrel with respect to the apparatus, and transmits detection information to the control means 7.
[0024]
In FIGS. 1 and 2, the brush switch 25 serving as the planetary plate position detecting means confirms that the second planetary gear 19 is at the winding thrust driving position meshing with the output gear 20 before the film winding thrust driving. Then, when it is confirmed that the second planetary gear 19 is present at a predetermined position, the film winding thrust drive is started, and the second planetary gear 19 transmits a driving force for driving the fork gear 3 from the output gear 20 in the thrust direction. Then, when the film 2 is wound around the film winding shaft 13 and the film 2 causes the fork gear 13 to over rotate by the winding drive by the film winding shaft 13, the output gear 20 also over rotates and the second planetary gear 19 is flipped. Performs the function of a clutch to fly. Since the first planetary plate 15 and the second planetary plate 21 are independent, the second planetary plate 21 is moved away from the output gear 20 as shown in FIG. Even if it revolves, the first planetary gear 12 continues to engage with the film winding shaft drive gear 13a without revolving. Then, the perforations 2a of the film 2 are detected by the photo reflector 8, and when a desired position is detected, the detection information is transmitted to the control means 7, and the current film position is stored in the storage means in the control means 7 (not shown). Then, the film winding thrust drive is completed.
[0025]
(Lens barrel extension drive)
3A and 3B are schematic perspective views of the optical apparatus according to the present embodiment in a state in which the lens barrel is driven to extend. FIG. 3A illustrates a feed driving mechanism, and FIG. 3B illustrates a lens barrel driving mechanism. FIG. 4 is a bottom perspective view of the optical apparatus according to the present embodiment in a state in which the lens barrel is driven to extend. That is, FIGS. 3 and 4 show a state after the power is switched from the film winding thrust drive of FIGS. 1 and 2 to the lens barrel feeding drive.
[0026]
After the film winding thrust feeding in FIGS. 1 and 2 is completed, the lens barrel feed-out 7 at the connection position shown in FIGS. 3 and 4, a motor control means 38 for controlling the motor 9, and a storage means 39 are also included. .
[0027]
FIG. 10 is a sequence diagram of the present application. In FIG. 10, when the completion of closing the cart chamber lid is detected by the lid closing detection switch 5 of the cartridge chamber (101Y), whether the cartridge has been loaded in the optical device is detected by the loading completion detection switch 6. When the cartridge is loaded (102Y), the position detection of the second planetary plate 21 by the brush switch 25 is started (103), and when it is detected that the second planetary plate 21 is at the winding position (104Y), the motor is stopped. The energization of 9 is started to feed the film winding thrust (105). When the film is detected by the photoreflector 8 to detect that the film has been wound up to the first photographable position (107Y), the film winding thrust feeding is terminated (108), and the second planetary gear 19 is wound up. Switching from the upper position to the lens barrel driving position is started (109). The second planetary plate position detecting means starts detecting the position of the brush switch 25 (110), and when it is detected that the second planetary plate 21 is at the lens barrel driving position (111Y), the driving of the motor 9 is terminated. (112), and waits for detection of the release switch 36 (116).
[0028]
In step 104, when the second planetary plate is not at the film winding position (104N), the motor is driven (113), and the second planetary plate position is detected (114). The motor drive is continued until the film winding position is engaged (115). Also, even if the second planetary plate is at the film winding position, the motor drive direction is the same as the film winding drive, so the motor drive direction is not stopped and the film is wound up without switching the rotation direction. This leads to driving (105).
[0029]
When the release switch 36 is pressed (116Y), the motor 9 is driven in the lens barrel extending direction (117), and at the same time, the absolute position of the lens barrel with respect to the optical device is detected by the linear sensor of the lens barrel position detecting means 34 (117). 118). When it is detected that the lens barrel has been extended to a desired position based on the lens barrel extension amount information obtained by the AF means (not shown) or the like (119Y), the lens barrel extension drive by the motor 9 is terminated. (120). Then, a photographing operation is performed for a desired exposure time by using photographing means 33 such as a shutter and an aperture provided inside the lens barrel (not shown) (121). After the photographing is completed, the motor 9 is energized in the direction opposite to the extension, the lens barrel is returned to the initial position and driven (122), and the absolute position of the lens barrel with respect to the optical device is detected by the linear sensor of the lens barrel position detecting means. (123). When it is detected that the lens barrel has been returned to the initial position (124Y), the lens barrel return drive of the motor 9 is terminated and power supply is stopped (125). On the basis of the information detected by the film position detecting means 8, 1 is added to the current number of images N stored in the storage means 39, and the result is stored again (132). It is determined whether or not the number of sheets has exceeded (133).
[0030]
If the number N1 is not exceeded (from 133N to 126 via A), the plunger driving unit 30 is energized to release the orbital motion regulation of the second planetary plate (126). In order to switch the first and second planetary gears from the lens barrel drive to the film winding thrust drive side, the motor 9 is turned on (127), and the second planetary plate 21 is turned on by the brush switch 25 of the second planetary plate position detecting means. The detection of the winding thrust position is started (128), and when it is detected (129Y), the energization of the plunger driving unit 30 is terminated (130), and the switching of the second planetary gear is completed (131), and the film winding drive is performed as it is. (From B to 105). In step 131, the energization of the motor 9 may be stopped once. However, if the rotation direction of the motor 9 is the same as the drive for switching the power from the lens barrel drive to the film winding thrust drive, the motor 9 is rotated if the rotation direction is the same. There is no need to turn off electricity. Similarly, in step 125, the current supply to the lens barrel 9 is temporarily stopped at the end of the lens barrel return drive. However, the driving force of the plunger 30 is necessary and sufficient, and the lens barrel return drive and the switching from the lens barrel return drive to the film winding drive are performed. If the motor rotation directions of the power switching drive are the same, there is no need to stop the motor in step 125.
[0031]
In step 133, if the current number of shots exceeds the number of shootable images N1 (133Y), the current number of shots in the storage means is cleared (134), and the plunger drive unit 30 is energized to lock the locking unit 27a. Release (135). In order to switch the third planetary gear 35 from the lens barrel drive to the film rewind drive side, energization of the motor 9 is started (136), and the second planetary plate 21 is rewinded by the brush switch 25 of the second planetary plate position detecting means. The detection of the position is started (137), and when the position is detected (138Y), the energization of the plunger drive unit 30 is terminated (139), the switching of the third planetary gear is completed, and the film rewind driving is directly performed (140).
[0032]
In the embodiment, the energization of the motor 9 must be stopped once in step 131. However, if the rotation direction of the motor 9 in the film rewinding drive is the same as the drive switching from the lens barrel drive to the film rewinding drive, the motor 9 There is no need to turn off power to the device. Similarly, in step 140, the film rewinding and feeding are performed without terminating the energization of the motor 9 at the end of the planetary switching drive. Then, it is necessary to temporarily stop the motor between steps 139 and 140.
[0033]
The film position detection is started by the film detection means (141). For example, if it is detected that the film is completely rewound such that the state where the perforation 2a is not detected for a long time continues (142Y), the motor 9 is used. The film rewinding drive is terminated (143), the energization of the plunger driving unit 30 is started, and the locking unit 27a is moved to a position where the locking of the second planetary plate cannot be locked (144).
[0034]
Further, in order to drive the first and second planetary gears to switch the power from the rewind position to the hoist position, driving of the motor 9 is started (145), and the position of the second planetary plate is detected (146). The second planetary gear 21 passes through the lens barrel driving position in the middle of switching because the locking portion 27a is held at the release position by the plunger 28, and when the second planetary gear 21 is connected to the output gear 20, the brush switch 25 causes the film winding thrust. By detecting the position (147Y), the energization of the plunger drive unit 30 is terminated (148), and the power switching drive by the motor 9 is terminated (149).
[0035]
As described above, in the present embodiment, by making the first planetary plate 15 and the second planetary plate 21 independent, the revolvable angle according to the power switching position of the second planetary plate can be changed. Was. However, if the output gear 20 is divided into two pairs of upper and lower gears and is a coaxially rotating one-way clutch gear unit having a one-way clutch, the second planetary gear is connected via the one-way clutch. If the thrust feeding driving force is transmitted to the output gear and the fork gear, and the third planetary gear transmits the rewinding feeding driving force to the output gear and the fork gear without passing through the clutch, the first planetary plate is provided. And the second planetary plate can be integrated, and there is no problem even if the revolving motions of the first, second and third planetary gears are linked.
[0036]
Further, in the embodiment, in the case of the film rewinding drive, the revolving motion of the first planetary gear is restricted by bringing the first planetary plate 15 into contact with the projection 24 for miniaturization, and the third planetary gear 35 is set in the output gear. And the film was rewound. However, the first planetary gear 12 may be connected to the output gear 20 and driven to rewind while avoiding the pinion gear 10 and the film winding shaft drive gear 13a. In this case, the third planetary gear is not required, which leads to cost reduction.
[0037]
Further, in the embodiment, the description has been given of the lens barrel extending / returning drive such as the focusing and the returning operation. However, a variable power drive may be used. In this embodiment, the power switching destination and other movements have been described with the lens barrel drive. However, even with the strobe drive, the cartridge chamber cover opening / closing drive related to cartridge loading, the cartridge light shielding window opening / closing drive, the cartridge loading / discharging drive, the cartridge chamber lid lock, and the like. Anything, such as a release operation, may be used.
[0038]
In the embodiment, the power switching between the film feeding and the lens barrel is disclosed, but the film feeding may be performed alone. That is, the locking lever 27, the plunger 28, the urging spring 29, and the plunger drive unit 30 are not required, and the lens barrel drive gear 31 requires a motor and a reduction gear dedicated to the lens barrel. Looking at the film feeding mechanism alone, the three-stage drive efficiently drives the film winding shaft drive gear, and the first planetary gear equally acts as a reduction gear for film thrust rewind drive, and the film winding system The reduction gear is shared with the fork gear drive system, and the reduction gear unit can be downsized.
[0039]
Further, there is no need for a dedicated switching means for holding an output gear (a planetary gear) for transmitting thrust power to a fork gear at the time of thrust feeding, as disclosed in Japanese Patent Application No. 10-249627.
[0040]
【The invention's effect】
As described above, the first planetary gear in the embodiment of the present application is not only for the film winding shaft drive gear, but also for the second third planetary gear for performing thrust rewind feed and lens barrel drive. It functions as a reduction gear, and can transmit substantially the same output to each transmission destination without reducing the reduction ratio to the first planetary gear. Therefore, the advantage of the common use of the components of the reduction gear is great, which also leads to cost reduction. Further, since the first planetary gear and the second planetary gear can have a structure having a common revolving shaft, not only the gear does not need to be developed on a plane, but also the power switching mechanism can be centrally arranged at one place (implementation). Example In FIG. 2, it is concentrated behind the film winding shaft 13 of the photographing device). Further, at the time of designing, the power transmission destination of each of the first, second and third planetary gears can be selected from 360 ° freely revolving angle positions, thereby increasing the degree of freedom in designing. Furthermore, by changing the revolvable angle of the second planetary gear according to the transmission destination, it is possible to provide a mechanism that can perform absorption operation without a special clutch mechanism, reducing the number of clutch parts and the height. Can contribute to
[0041]
By using the above-described power switching mechanism for feeding the film and driving the lens barrel, a part of the lens barrel motor and the lens barrel reduction gear can be reduced, and the entire photographing apparatus can be reduced in size. Further, by using a feed motor having a relatively larger torque than the lens barrel motor as the drive motor, it becomes easy to drive even a lens barrel having a large driving load.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a film winding thrust driving state in an optical apparatus of the present embodiment.
FIG. 2 is a perspective view of the lower surface of the optical device of the present embodiment in a film winding thrust driving state.
FIG. 3 is a schematic perspective view of the optical apparatus according to the present embodiment in a state in which the lens barrel is driven to extend.
FIG. 4 is a bottom perspective view of the optical device of the present embodiment in a state in which the lens barrel is driven to extend.
FIG. 5 is a schematic perspective view of the optical device of the present embodiment in a lens barrel return driving state.
FIG. 6 is a bottom perspective view of the optical device of the present embodiment in a lens barrel return driving state.
FIG. 7 is a schematic perspective view of the optical device of the present embodiment in a film rewind driving state.
FIG. 8 is a bottom perspective view of the optical device of the present embodiment in a film rewind driving state.
FIG. 9 is an electric block diagram of the present embodiment.
FIG. 10 is a sequence according to the embodiment.
[Explanation of symbols]
1 Cartridge film
2 Film
3 Fork gear
4 Cartridge chamber lid
5 Cartridge chamber lid close detection switch
6 Cartridge loading completion switch
7 control means
8 Photo reflector
9 Motor
10 Pinion gear
11 Daiichi Taiyo Gear
12 First planetary gear
13 Film winding shaft
14 Elastic body
15 First Planet
16 planetary axes
17 Planetary spring
18 Second Sun Gear
19 Second Planetary Gear
20 Output gear
21 Second Planetary Board
22 planetary shaft
23 planet spring
24 Projection
25 brush switch
26 Pattern base
27 Lock lever
28 plunger
29 biasing spring
30 Plunger drive
31 Barrel drive gear
32 transmission gear
33 lens barrel
34 lens barrel position detecting means
35 Third Planetary Gear
36 Release switch
37 Microcomputer
38 Motor control means
39 storage means

Claims (5)

A film winding shaft,
A first planetary gear having a driving force from a driving source and transmitting the driving force to the film winding shaft;
There is a second planetary gear that transmits driving force to the film winding shaft or other movable means in the film cartridge, and a drive transmission path from the first planetary gear to the second planetary gear is always connected,
The driving force is transmitted from the first planetary gear to the second planetary gear,
A film feeding device and an optical device using the same. A film winding shaft,
A first planetary gear having a driving force from a driving source and transmitting the driving force to the film winding shaft;
There is a second planetary gear that transmits driving force to the film take-up shaft and other movable means in the film cartridge, and a revolution regulating means that regulates the revolution of the second planetary gear,
A film feeder wherein the revolvable angle of the second planetary gear during transmission of the driving force differs according to the driving force transmission destination of the second planetary gear, and an optical device using the same. 3. The film feeding apparatus according to claim 1, wherein the other movable means is a lens barrel, and an optical apparatus using the same. 4. The film feeder according to claim 1, wherein the revolving centers of the first planetary gear and the second planetary gear are substantially coaxial, and an optical apparatus using the same. 5. The film feeder according to claim 1, wherein the first planetary gear and the second planetary gear are supported by different revolution support means, and an optical apparatus using the same.

Images