JPH08160512A - Driving device for camera - Google Patents

Abstract

PURPOSE: To reduce the size and cost of a camera by providing first - third planetary gear mechanisms for transmitting the rotation of a motor. CONSTITUTION: The first planetary gear mechanisms 27 and 25 transmit the rotation of the motor 24 to a first path provided with a zooming mechanism and a film unwinding mechanism, when the motor 24 is rotated forward and alternately switch and transmit the rotation of the motor to a second path provided with a film winding mechanism, when the motor 24 is rotated backward. At the time of rotating the motor 24 forward, the planetary gear mechanisms 39 and 35 transmit the rotation of the first path to the film unwinding mechanism, when a zooming lever 13 is in a neutral position and to the zooming mechanism, when the zooming lever 13 is in a tele-side or wide side position. Further, when the motor 24 is rotated backward, the third planetary gear mechanisms 15, 19 and 23 rotate the second planetary gear mechanisms 39 and 35 forward or backward according to the tele-side or wide side position of the zooming lever 13, to transmit the rotation to the zooming mechanism.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a camera driving device having a zooming mechanism, a film winding mechanism and a film rewinding mechanism.

[0002]

2. Description of the Related Art As a camera of this type, a structure in which a motor for driving a zooming mechanism, a film winding mechanism, and a film rewinding mechanism is mounted on each camera has been known. However, a camera having such a structure requires a large amount of space for accommodating at least three motors in the camera body, which leads to an increase in size of the camera. Further, since such a motor is required to have high accuracy, it is expensive, and the cost of the camera in which an expensive motor is prepared for each mechanism is inevitably increased.

On the other hand, only one motor is mounted on the camera body, and the forward / reverse rotation thereof is appropriately switched by a switching mechanism using a solenoid or the like, and a zooming mechanism, a film winding mechanism and a film rewinding mechanism are combined into the single motor. It is also known to have a camera driven by each. However, even in such a camera, the cost is inevitable because the solenoid is expensive, and the switching mechanism requires a complicated structure, so that the camera is inevitably increased in size.

[0004]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above-mentioned problems relating to a conventional camera driving device, and it is possible to reduce the size of the camera by realizing the space saving in the camera body. It is an object of the present invention to obtain a camera drive device that can be down.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention drives a zooming mechanism, a film winding mechanism and a film rewinding mechanism by a single forward and reverse rotation motor, respectively. In a camera driving device driven by a zooming lever having a side position and a wide side position, when the motor rotates in a forward direction, the rotation of the motor is directed to a first path provided with a zooming mechanism and a film rewinding mechanism. A first planetary gear mechanism that transmits the rotation of the motor when it rotates in the reverse direction, and selectively transmits the rotation of the motor to a second path provided with a film winding mechanism; When the zooming lever is in the neutral position, the rotation of the first path is transmitted to the film rewinding mechanism, and the zooming lever is moved to the tele position or the wide position. The second planetary gear mechanism that transmits the rotation of the first path to the zooming mechanism when in the position; and when the motor rotates in the forward direction, the zooming lever is located in either the tele position or the wide position. Depending on whether the third planetary gear mechanism is rotated, the rotation of the second planetary gear mechanism is transmitted to the zooming mechanism as normal rotation or reverse rotation.
It is characterized by having a planetary gear mechanism.

Further, according to the present invention, a single forward / reverse rotation motor drives a zooming mechanism, a film winding mechanism and a film rewinding mechanism respectively, and the zooming mechanism has a neutral position, a tele side position and a wide side position. In a camera driving device driven by a zooming lever, when the motor rotates in a forward direction, the rotation of the motor is transmitted to a first path provided with a zooming mechanism and a film winding mechanism, and rotates in the opposite direction. At this time, the first planetary gear mechanism selectively transmits the rotation of the motor to the second path provided with the film rewinding mechanism; when the motor rotates in the forward direction, when the zooming lever is in the neutral position. ,
The rotation of the first path is transmitted to the film winding mechanism,
A second planetary gear mechanism that transmits the rotation of the first path to the zooming mechanism when the zooming lever is at the tele position or the wide position; and when the motor rotates in the forward direction, the zoom lever moves to the telescopic position. A third planetary gear mechanism is provided, which transmits the rotation of the second planetary gear mechanism to the zooming mechanism as normal rotation or reverse rotation depending on whether it is located at the side position or the wide side position.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. FIG. 1 is a perspective external view showing a camera driving device according to the present invention in a neutral state of a zooming lever.
Shows a camera to which this driving device is applied.

As shown in FIG. 7, the camera 10 has a zoom lens L on the front wall of a camera body 9 and a shutter button 1 for driving a shutter mechanism (not shown) on the upper wall. , A back cover 14 rotatably supported on the rear wall 5 with respect to the camera body 9, a viewfinder eyepiece window 4, and a zooming lever 1 for driving a zooming mechanism (not shown).
Three. The camera body 9 has a hoisting spool 7 and a rewinding fork 8 rotatably provided in the left and right chambers 2 and 3 of the aperture 6, respectively, and a microcomputer (hereinafter referred to as a microcomputer) M for performing various controls related to photographing and the like.
Built in.

As shown in FIG. 1, the driving device 11 has the zooming lever 13 rotatably supported by the camera body 9 via a shaft 12. This zooming lever 13 is provided with a knob portion 1 protruding rearward of the camera body 9.
3a, and is urged to rotate from the left and right wide side positions and the tele side position toward the central neutral position. The neutral position is a position in which the planetary gears 19 and 23 are not meshed with the planetary gear 39 when the zooming lever 13 is not operated and is in a free state. The zooming lever 13 turns on the zoom drive switch 48 (FIG. 1) when the knob 13a is rotated left and right (directions of arrow B and A), and the microcomputer M directs the forward / reverse rotation motor 24 to move forward. Output the direction rotation command. In the zoom drive switch 48, the planetary gear 19 or the planetary gear 23 is changed to the planetary gear 39 by the turning operation of the zooming lever 13.
It has an electrical contact piece (not shown) that conducts when meshed with.

The drive unit 11 also has a V-shaped planetary lever 20 whose top is fixed to the lower extension of the shaft 12. At the top of this planetary lever 20, the sun gear 15
It is rotatably supported on the top and coaxially with the zooming lever 13. On one arm 20a of the planetary lever 20, an idle gear 16 that meshes with the sun gear 15 is provided.
And the idle gear 17 that meshes with the idle gear 16
A planetary gear 19 meshing with the idle gear 17 is rotatably supported. The sun gear 15 and the planet gears 19 and 23 form a third planetary gear mechanism. Further, the shaft 19a protruding above the planetary gear 19
A regulating arm 21 having an arcuate regulating surface 21a with the shaft 12 as the center of curvature is fixed at one end. On the other arm 20b of the planetary lever 20, an idle gear 22 that meshes with the sun gear 15 and a planetary gear 23 that meshes with the idle gear 22 are rotatably supported.

The drive unit 11 further has a driving gear (sun gear) 25 supported by a shaft 18 so as to be rotatable in the forward and reverse directions. The rotation of the single forward / reverse rotation motor 24 is transmitted to the driving gear 25. On the shaft 18 of the driving gear 25,
A planetary lever 26 projects in the radial direction of the driving gear 25 and is rotatably supported. At the free end of the planetary lever 26, a planetary gear 27 that meshes with the driving gear 25 is rotatably supported. This planetary gear 27 is the driving gear 2
5 and 5 form a first planetary gear mechanism and have a pressing shaft 29 protruding upward by a predetermined amount.

A sun gear 35, which is supported by the shaft 18 coaxially with the driving gear 25, is located above the driving gear 25. A planetary lever 36 is rotatably supported on the shaft 18, and the sun gear 3 is attached to the free end of the planetary lever 36.
A planetary gear 39 meshing with the gear 5 is rotatably supported. The planetary gear 39 forms a second planetary gear mechanism together with the sun gear 35, and has a pressed member 41 that can be engaged with the pressing shaft 29 and that protrudes downward coaxially with the shaft 37. As for the pressing shaft 29 of the planetary gear 27, the planetary gear 39 is the sun gear 3
Moves around (rotates) while meshing with 5 and rotating
It is located on the movement locus of the pressed member 41 at that time. Therefore, the pressed member 41 causes the rewinding gear 42 that interlocks the planetary gear 39 with the film rewinding mechanism during the normal rotation of the motor 24.
When meshing with, the engagement with the pressing shaft 29 in the state shown in FIG. 1 prevents the planetary gear 39 from moving beyond the proper meshing position. Further, the pressed member 41 is pressed in the same direction by the pressing shaft 29 that moves together with the planetary lever 26 that rotates counterclockwise in FIG. 5 when the motor 24 reversely rotates in the meshing state with the rewind gear 42. , To the initial position shown in FIG.

A streamlined regulated member 40 facing the tangential direction of the sun gear 35 is fixed above the shaft 37. In the regulated member 40, the regulating arm 21 is attached to the shaft 1
When rotating counterclockwise in FIG.
By being engaged with a, the revolution that moves while rotating around the sun gear 35 is restricted.

The drive unit 11 is also interposed between the planetary gear 27 and the sun gear 35 to interlock them, an idle gear 30 meshing with the planetary gear 27, an idle gear 31 meshing with the idle gear 30, and It has an idle gear 31 and an idle gear 33 which are coaxially connected to each other by a shaft 32 and mesh with a sun gear 35.

A winding gear 43 interlocking with a film winding mechanism for rotating the winding spool 7 is rotatably supported by the shaft 28 at a position where it can be meshed with the planetary gear 27 which moves around the shaft 18. There is. The camera body 9 is provided with a drive completion detection switch 44 for detecting completion of drive of a shutter mechanism (not shown). When the drive completion detection switch 44 detects the completion of drive of the shutter mechanism,
A reverse rotation command is output from the microcomputer M to the motor 24.

Further, the planetary gear 3 which moves around the shaft 18
A rewinding gear 42 that interlocks with a film rewinding mechanism that rotates the rewinding fork 8 is rotatably supported by a shaft 34 at a position where it can be meshed with 9. The camera body 9 is provided with an end detection switch 38 for detecting the end of the loaded film. This end detection switch 38
Detects a film end, the microcomputer M outputs a forward rotation command to the motor 24.

In the microcomputer M, while the film winding mechanism is being driven by the reverse rotation of the driving gear 25, the zooming lever 13 is operated from the neutral position to the tele side or the wide side, and the zoom drive switch 48 is turned on. However, by ignoring this in terms of software, the motor 24 is not rotated in the forward direction. That is, the driving priority is set so that the film winding mechanism is positioned higher than the zooming mechanism. Further, the microcomputer M performs rewinding when the zooming lever 13 is returned to the neutral position when the zooming lever 13 is on the tele side or the wide side at the moment of rewinding. After the rewinding, the microcomputer M further outputs a reverse rotation command to reversely rotate the driving gear 25 and return the planetary gear 39 to the initial position (see FIG. 1) via the pressing shaft 29 and the pressed member 41.

A camera driving device 11 having the above structure
Operates as follows. That is, when the main power switch (not shown) is turned on, when the knob 13a is rotated from the neutral position, for example, in the direction of arrow A (tele side) in FIG. 1, the planet gear 19 causes the shaft 12 and the planet lever 20. 2 to approach the planetary gear 39 and mesh with the planetary gear 39, resulting in the state shown in FIG. At this time, since the zoom drive switch 48 is turned on by the electric contact piece (not shown) that moves following the rotation of the zooming lever 13, the microcomputer M outputs a forward rotation command, and the motor 24 rotates forward. Driven.

Therefore, the planetary gear 27 is replaced by the drive gear 25.
The normal rotation of the motor 24 is moved around the shaft 18 and pressed against the idle gear 30, so that the normal rotation of the motor 24 is transmitted from the planetary gear 27 to the idle gear 30, and further through the idle gears 31 and 33. Be transmitted to. At this time, the planetary gear 39 tries to separate from the planetary gear 19 by the clockwise rotation of the sun gear 35, but the regulated member 40 fixed to the shaft 37 is already regulated by the regulation surface 21a of the regulation arm 21. Therefore, the planetary gear 39 transmits the normal rotation to the planetary gear 19 while being in mesh with the planetary gear 19. Therefore, this positive rotation is transmitted from the planetary gear 19 to the sun gear 15 via the two idle gears 17 and 16 as the positive rotation. This allows
The zoom lens L is driven to the tele side (telephoto side) via the zooming mechanism.

When the knob 13a is released in this state,
The zooming lever 13 is returned to the neutral position by the rotational biasing force (FIG. 1). As a result, the planet gears 19 are
And the zoom drive switch 48 is turned off, the sun gear 15 stops rotating.

On the other hand, when the knob 13a is rotated from the neutral position, for example, in the direction of arrow B (wide side) in FIG. 1, the planetary gear 23 approaches the planetary gear 39 via the shaft 12 and the planetary lever 20. Then, they are meshed with each other to be in the state shown in FIG. At this time, an electric contact piece (not shown) that moves following the zooming lever 13 turns on the zoom drive switch 48, so that a forward rotation command is output from the microcomputer M and the motor 24 is driven in the forward direction. .

Therefore, also in this case, the positive rotation of the motor 24 is transmitted to the sun gear 35 through the same path as when driving the telephoto side. At this time, due to the clockwise rotation of the sun gear 35, the planetary gear 39 tries to move (revolve) clockwise about the shaft 18 while rotating, but the planetary gear 23 is located on the revolution movement side. The planetary gear 39 meshes with the planetary gear 23 in the free state of the regulated member 40. Therefore, the normal rotation of the motor 24 is transmitted from the planetary gear 23 to the sun gear 15 via the idle gear 22. Since the planetary gear 23 side has one less idle gear than the planetary gear 19 side, the planetary gear 2 is in the same path as when driving on the tele side.
The rotation transmitted to the sun gear 3 as the forward rotation is transmitted to the sun gear 15 as the reverse rotation. As a result, the zoom lens L is moved to the wide side (wide angle side) via a zooming mechanism (not shown).
Driven towards.

In this state, when the finger is released from the knob 13a, the zooming lever 13 returns from the wide side to the neutral position, the planetary gear 23 is separated from the planetary gear 39, and the zoom drive switch is moved as shown in FIG. Since 48 is turned off, the sun gear 15 stops rotating.

For example, in the state shown in FIG. 1, when the shutter button 1 is pressed to release the shutter, the completion of driving of the shutter driving mechanism is detected by the driving completion detecting switch 44, and the reverse rotation command is issued from the microcomputer M. Motor 24
Is output to. As a result, the motor 24 is rotationally driven in the reverse direction, and the planetary gear 27 moves (revolves) around the shaft 18 while rotating and meshes with the hoisting gear 43, so that the reverse rotation is performed through the hoisting gear 43. It is transmitted to the hoisting mechanism. Therefore, by driving the film winding mechanism, one frame of the film having been photographed is wound up.

For example, if the zooming lever 13 is in the neutral position when the filming of all the films is completed and the end detection switch 38 is turned on, the microcomputer M outputs a forward rotation command to the motor 24. Therefore, the forward / reverse rotation motor 24 is normally rotated in the same manner as during zooming, but since the zooming lever 13 is not operated to the tele side or the wide side, the member 40 to be regulated is restricted by the regulated arm 21.
It is in a free state that is not regulated by. As a result, the sun gear 35 to which the positive rotation is transmitted along the same path as during zooming
The rotation of the planetary gear 39 causes the sun gear 3 to rotate.
5, the planetary gear 39 meshes with the rewinding gear 42 as shown in FIG. Therefore, the rotation of the planetary gear 39 is transmitted to the film rewinding mechanism (not shown) through the rewinding gear 42, and the film is rewound entirely by driving the film rewinding mechanism. At this time, the zooming lever 13 moves clockwise in FIG.
Even if the planetary gear 39 is not on the movement path of the planetary gears 19 and 23 even if the planetary gear 39 is rotated counterclockwise,
Neither 23 can mesh with the planetary gear 39.

The drive device 11 to which the present invention is applied in this way
According to this, all of the zooming mechanism, the film winding mechanism, and the film rewinding mechanism can be driven only by rotating the single motor 24 in the forward and reverse directions. Therefore, the drive device 11 does not increase the size and cost of the camera unlike the conventional camera in which the zooming mechanism, the film winding mechanism, and the film rewinding mechanism are driven by individual motors. In addition, the main drive unit 11
Uses a single motor 24, but it is not necessary to switch the rotation path by an expensive solenoid or the like. Therefore, it is possible to suppress cost increase, and a complicated switching mechanism using a solenoid or the like is required. Because there is no
It does not increase the size of the camera.

Further, the positions of the hoisting gear 43 and the rewinding gear 42 of the first embodiment are exchanged as shown in FIG. 6, and the planetary gear 27 revolves around the sun gear 25 when the motor 24 rotates in the reverse direction. So as to drive the film rewinding mechanism by meshing with the rewinding gear 42, and the planetary gear 39 that revolves around the sun gear 35 when the motor 24 rotates in the normal direction is meshed with the winding gear 43 to drive the film winding mechanism. Can be configured to.

In the case of such a structure, while the film rewinding mechanism is being driven by the reverse rotation of the driving gear 25, the zooming lever 13 is operated to the tele side or the wide side, and the zoom drive switch 48 is operated. Even if it is turned on, the motor 24 is configured so as not to rotate in the forward direction by ignoring it in terms of software, and the driving priority of the film rewinding mechanism is set higher than that of the zooming mechanism. When the planetary gear 39 is meshed with the hoisting gear 43 of FIG. 6 and the planetary gear 39 is returned to the initial position by rotating the driving gear 25 in the reverse direction, Means such as mechanical locking are provided so as not to mesh with the return gear 42 (to prevent transmission of power). Furthermore, the forward / reverse rotation motor 2
The forward rotation command to 4 is output from the microcomputer M based on the ON operation of the zoom drive switch 48 linked to the operation of the zooming lever 13 or the detection of the drive completion detection switch 44 that detects the completion of the drive of the shutter mechanism. To configure. The reverse rotation command to the forward / reverse rotation motor 24 is configured to be output from the microcomputer M based on the detection of the end detection switch 38 that detects the end of the film.

According to the second embodiment having such a structure, the zooming mechanism and the film winding mechanism can be driven during the forward rotation of the forward / reverse rotation motor 24, and the reverse rotation of the forward / reverse rotation motor 24 is possible. In, the film rewinding mechanism can be driven. Therefore, similarly to the above-described first embodiment, it is possible to contribute to downsizing of the camera and cost reduction.

[0030]

As described above, according to the camera driving apparatus of the present invention, it is possible to realize space saving in the camera body, downsize the camera, and reduce the cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a neutral state of a camera driving device according to the present invention.

FIG. 2 is a perspective view showing a tele-side operation state of the drive device of the camera.

FIG. 3 is a perspective view showing a wide-side operation state of the driving device of the camera.

FIG. 4 is a perspective view showing a film winding state of a driving device of the camera.

FIG. 5 is a perspective view showing a film rewinding state of the driving device of the camera.

FIG. 6 is a perspective view showing a second embodiment of the camera driving device according to the present invention.

FIG. 7 is a perspective external view of a camera equipped with the drive device as viewed from the rear side of the body.

[Explanation of Codes] 1 shutter button 7 winding spool 8 rewinding fork 9 camera body 10 camera 13 zooming lever 13a knob 15 35 sun gear 16 17 22 idle gear 19 23 27 39 planetary gear 20 26 36 36 planetary lever 21 regulation arm 21a Regulation surface 24 Forward / reverse rotation motor 25 Driving gear (sun gear) 38 End detection switch 40 Regulated member 42 Rewinding gear 43 Hoisting gear 44 Drive completion detection switch 48 Zoom drive switch L Zoom lens M Microcomputer

Claims (9)

[Claims] 1. A single forward / reverse rotation motor drives a zooming mechanism, a film winding mechanism and a film rewinding mechanism, respectively, and the zooming mechanism uses a zooming lever having a neutral position, a tele side position and a wide side position. In a driving device for a driven camera, when the motor rotates in the forward direction, the rotation of the motor is transmitted to a first path provided with a zooming mechanism and a film rewinding mechanism, and when the motor rotates in the reverse direction, the motor is transmitted. First planetary gear mechanism that selectively transmits the rotation of the motor to the second path provided with the film winding mechanism; when the zooming lever is in the neutral position when the motor rotates in the forward direction, The rotation of the first path is transmitted to the film rewinding mechanism, and when the zooming lever is at the tele side position or the wide side position, the first path A second planetary gear mechanism that transmits rotation to the zooming mechanism; and, when the motor rotates in the forward direction, the second planetary gear mechanism depending on whether the zooming lever is located at the tele position or the wide position. A driving device for a camera, comprising: a third planetary gear mechanism for transmitting the rotation of the mechanism to the zooming mechanism as a forward rotation or a reverse rotation. 2. A single forward / reverse rotation motor drives a zooming mechanism, a film winding mechanism and a film rewinding mechanism, respectively, and the zooming mechanism uses a zooming lever having a neutral position, a tele side position and a wide side position. In a driven device for a driven camera, when the motor rotates in the forward direction, the rotation of the motor is transmitted to a first path provided with a zooming mechanism and a film winding mechanism, and when the motor rotates in the reverse direction, the motor is transmitted. First planetary gear mechanism for selectively transmitting the rotation of the motor to the second path provided with the film rewinding mechanism; when the zooming lever is in the neutral position when the motor rotates in the forward direction, The rotation of the first path is transmitted to the film winding mechanism, and when the zooming lever is at the tele side position or the wide side position, the first path A second planetary gear mechanism that transmits rotation to the zooming mechanism; and, when the motor rotates in the forward direction, the second planetary gear mechanism depending on whether the zooming lever is located at the tele position or the wide position. A driving device for a camera, comprising: a third planetary gear mechanism for transmitting the rotation of the mechanism to the zooming mechanism as a forward rotation or a reverse rotation. 3. The forward rotation command to the forward / reverse rotation motor according to claim 1, is output based on an ON operation of a zoom drive switch which is interlocked with an operation of a zooming lever or a detection of an end detection switch which detects a film end. Camera drive device. 4. The camera drive device according to claim 1, wherein the reverse rotation command to the forward / reverse rotation motor is output based on detection of a drive completion detection switch for detecting completion of drive of the shutter mechanism. 5. The forward rotation command to the forward / reverse rotation motor according to claim 2, wherein a zoom drive switch is turned on in conjunction with a zooming lever operation, or a drive completion detection switch for detecting completion of driving the shutter mechanism is detected. Drive device of the camera output based on the. 6. The camera drive device according to claim 2, wherein the reverse rotation command to the forward / reverse rotation motor is output based on detection of a trailing end detection switch that detects a trailing end of the film. 7. The planetary gear mechanism according to claim 1 or 2, wherein the third planetary gear mechanism revolves around the planetary gear of the second planetary gear mechanism when the zooming lever is operated to either the tele side position or the wide side position. A drive device for a camera equipped with a regulation arm that regulates movement. 8. The third planetary gear mechanism according to claim 1, further comprising a sun gear forming a part of the zooming mechanism and a pair of planet gears revolving around the sun gear. The planetary gear is a drive device of the camera that meshes with a single planetary gear of the second planetary gear mechanism according to the operation of the zooming lever to the tele position or the wide position. 9. The camera according to claim 8, wherein one of the pair of planet gears meshes with the sun gear through an even number of idle gears, and the other planet gear meshes with the sun gear through an odd number of idle gears. Drive.