JP2001021784A - Drive for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera driving device capable of driving by switching plural driven parts by a single driving source without using an actuator such as an electro-magnet. SOLUTION: In this drive for a camera, a shutter opening and closing mechanism part 76 is openedly and closedly driven by a planetary gear mechanism part 71 driven by a motor 1, and a lens driving mechanism part 77 is advancedly and retactedly driven, on the other hand, by a sun gear part 9 of the planetary gear mechanism part 71 via a delay driving mechanism part 72. When the planetary gear mechanism part 71 is located in a prescribed position, driving force of the motor 1 is transmitted to only the lens driving mechanism part 77, and the mechanism part 77 is advancedly and retractedly driven without driving the shutter opening and closing mechanism 76 so as to return the camera to a reset condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera driving apparatus for driving a plurality of mechanical units built in a camera by switching the driving unit with a driving source.

[0002]

2. Description of the Related Art Conventionally, various drive mechanisms for driving a focus adjustment mechanism and an exposure control drive mechanism in a camera by a single motor have been proposed. For example, an electromagnetically driven shutter in a camera disclosed in JP-A-61-9631 or JP-A-61-9632 drives a focus adjustment mechanism and an exposure control mechanism with a single motor. In addition, a latch electromagnet for holding the lens at a fixed position in the above focus adjustment is required. Therefore, the size of the camera body becomes large, and it is difficult to make the camera compact.

Therefore, an electromagnetically driven shutter (lens shutter) for a camera disclosed in Japanese Patent Application Laid-Open No. 1-116626 has been proposed as eliminating the need for the latching electromagnet. The electromagnetically driven shutter is in contact with a primary rotating member that is constantly linked to the rotation of the forward / reverse rotation motor, and abuts and engages the primary rotating member at a specific rotational position, and rotates together with the primary rotating member in forward rotation. A secondary rotating member, a lens barrel with a built-in focus adjustment mechanism that moves in conjunction with the secondary rotating member, and is supported by the secondary rotating member and is opened and closed by forward rotation relative to the primary and secondary rotating members. Lens shutter, a one-way locking mechanism that allows the rotation of the secondary rotating member from the initial position to the terminal position and prevents the rotation in the opposite direction, and when the secondary rotating member rotates to the terminal position. Means for releasing the locking of the one-way locking mechanism.

[0004]

However, in the electromagnetically driven shutter of the camera disclosed in Japanese Patent Application Laid-Open No. 1-116626, the focus adjustment mechanism is driven in one direction, and the shutter reaches the lens extension end. To release the lock and rapidly return to the lens retracted position.

In recent years, there has been provided a camera of a type capable of driving a focus adjustment driving mechanism in both directions in order to save space and eliminate a detecting means. However, there has not yet been proposed a device that enables exposure control driving as well as focus adjustment driving in both directions and that improves driving accuracy.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and can switch and drive a plurality of driven parts by a single drive source without using an actuator such as an electromagnet. It is an object of the present invention to provide a camera driving device which has improved controllability and driving accuracy and has a simple configuration.

[0007]

According to a first aspect of the present invention, there is provided a camera driving apparatus, comprising: a driving source; a sun gear rotated by the driving source; A first planetary gear whose position is movable between a first driving force transmitting position at which the driving force of the driving source is transmitted and a first non-transmitting position at which the driving force of the driving source is not transmitted; A driven gear that is driven in mesh with the gear, cam means that is interlocked with the movement of the driven gear, and the first planetary gear at the first driving force transmission position that is interlocked with the cam means. A second driving force transmission position capable of receiving a driving force, and a second planetary gear movable to a second non-transmission position incapable of receiving the driving force from the first planetary gear; And the first
After the planetary gears have moved from the first non-transmission position to the first driving force transmission position, the second planetary gears
Moving from the second non-transmission position to the second driving force transmission position is prohibited.

According to a second aspect of the present invention, there is provided a camera driving device, comprising: a driving source; a sun gear rotated by the driving source; a first moving member that rotates about a rotation center of the sun gear; A first driving force transmitting position rotatably supported by a first moving member, meshing with the sun gear, and transmitting a driving force of the driving source at a position depending on a rotation direction of the sun gear; A first planetary gear that can revolve to a first non-transmission position that does not transmit the driving force, a driven gear that is driven in mesh with the sun gear, and cam means that is interlocked with the movement of the driven gear. A second moving member interlocked with the cam means, rotatably supported by the second moving member, and receiving a driving force from the first planetary gear at the first driving force transmitting position. A second driving force transmission position capable of And a second planetary gear which can revolve in a second non-transmission position it is not possible to receive a driving force from the first planetary gear, the first planetary gear the first
When the second planetary gear moves from the second non-transmission position to the second driving force transmission position after moving from the non-transmission position to the first driving force transmission position, The second moving member is restricted by the first moving member, and the second planetary gear cannot be located at the second driving force transmitting position.

According to a third aspect of the present invention, there is provided a camera driving device, comprising: a driving source; a sun gear rotated by the driving source; a first moving member that rotates about a rotation center of the sun gear; A first driving force transmitting position rotatably supported by a first moving member, meshing with the sun gear, and transmitting a driving force of the driving source at a position depending on a rotation direction of the sun gear; A first planetary gear that can revolve to a first non-transmission position that does not transmit the driving force, a driven gear that is driven in mesh with the sun gear, and cam means that is interlocked with the movement of the driven gear. A second moving member interlocked with the cam means, rotatably supported by the second moving member, and receiving a driving force from the first planetary gear at the first driving force transmitting position. A second driving force transmission position capable of A second planetary gear that can revolve to a second non-transmission position where it cannot receive a driving force from the first planetary gear; and control means for controlling a rotation direction of the drive source. After the first planetary gear is moved from the first non-transmission position to the first driving force transmission position, the second planetary gear is moved from the second non-transmission position to the second driving force. When trying to move to the force transmitting position, the second moving member is restricted by the first moving member, and the second planetary gear cannot be located at the second driving force transmitting position.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a camera driving device according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view around the first and second planetary gears in the camera driving device. FIG. 3 is a plan view around the first and second planetary gears, and shows a state where the gears can mesh with each other. FIG. 4 is a plan view around the first and second planetary gears and shows a state where the gears cannot mesh with each other. In the following description, the rotation direction of each member is indicated by the rotation direction when viewed from above in FIG. 1 and the like, and the clockwise direction is the CW direction and the counterclockwise direction is the CCW direction.

The drive device of the present embodiment is applied as a drive mechanism for switching and driving a shutter opening / closing drive mechanism of a camera and a photographing lens focus adjustment drive mechanism. The driving device mainly includes a driving unit 70 having a driving source and a driving unit 7.
0, a planetary gear mechanism 71, a delay drive mechanism 72, which is a drive force transmitting unit that is driven through the planetary gear mechanism 71 and is capable of idling within a predetermined angle range, and a delay drive mechanism 72. Drive unit 73, a connection drive unit 74 that is reset by the cam drive unit 73 and is driven by the planetary gear mechanism unit 71, and a connection drive unit 7.
4, a shutter opening / closing mechanism 76 serving as a first driven unit that opens and closes a shutter, and an image taking unit serving as a second driven unit that drives an imaging lens driven by a cam driving unit 73 forward and backward. The lens drive mechanism 77 is provided.

The driving section 70 is a single driving source.
A motor 1 in which a pinion 2 and a slit plate 3 are fixed to an output shaft;
Large gear 6 and small gear 7 integrated with large gear 6
And a motor PI (photo interrupter) 61 which is a motor rotation amount detecting means for detecting passage of the slit due to rotation of the slit plate 3.

The planetary gear mechanism 71 includes a gear 9 meshing with the small gear 7 rotatably supported on a support shaft 8, a sun gear 10 integral with the gear 9, and a sun gear 1.
Carrier 12 which is a first moving member which is supported so as to be coaxially rotatable in a state where friction is given to
, A gear support shaft 11 fixed to a carrier 12, and a sun gear 1 rotatably (spinning) supported by the gear support shaft 11.
0 and the revolvable first planetary gear 13 which is always engaged
And a fan-shaped shielding plate 14 fixed to the carrier 12;
It comprises a planet PI62 for detecting the rotational position of the carrier 12 based on the position of the shielding plate, and main body stoppers 58 and 59 for restricting the rotational position of the carrier 12. Further, as shown in FIG. 2, the gear support shaft 11 supporting the first planetary gear 13 is
The tip 11a protrudes from the first planetary gear 13, and functions as a stopper for a reset lever 34 described later.

In the planetary gear mechanism 71, when the sun gear 10 rotates in both directions, the carrier 12 rotates in the CW direction or the CCW direction due to the friction, and the main body stopper 58 or 59. (See FIGS. 3 and 4). In a state where the carrier 12 is in contact with the stopper 58, the first planetary gear 13 is located at a separated position (first non-transmission position) P13A where the first planetary gear 13 cannot mesh with a second planetary gear 36 described later.
2 is in contact with the stopper 59, the first planetary gear 1
Reference numeral 3 denotes an abutting position (first driving force transmitting position) P13B at which engagement with the second planetary gear 36 is possible.

The delay drive mechanism 72 includes a first drive side.
It comprises a delay gear 17 and a second delay gear 18 on the driven side. The first delay gear 17 is a gear portion rotatably supported by the support shaft 16, and includes a driving pin 17a as a connecting member.
Has been planted. The second delay gear 18 is connected to the support shaft 1.
The shaft hole 18a into which the motor 6 is rotatably fitted and the drive pin 17g can be slidably fitted therein, and has an arc-shaped elongated hole 18b having a predetermined angle.

The first delay gear 17 is always meshed with the gear 9 of the planetary gear mechanism. Second delay gear 18
The rotation is transmitted to the cam gear 22 in a state where the drive pin 17g of the first delay gear 17 is in contact with the end in the rotation direction of the arc-shaped long hole 18b. In a state where 17g is in the middle of the arc-shaped long hole 18b, the rotation is not transmitted.

The cam driving section 73 includes a cam gear 22, which is a driven gear rotatably supported by the support shaft 21, and a switching cam 23, which is integral with the cam gear and has cam means having a projection 23a. It comprises a shielding plate 24 and a cam PI 63 for detecting the rotational position of the cam.

The connection driving section 74 is rotatably supported by the support shaft 31 and a reset lever 32 rotatably supported by the support shaft 33 and is driven by the reset lever 32 to rotate. Connecting lever 34 as a moving member
And a connection lever spring 37 formed of a torsion spring for urging the connection lever 34 in the CW direction.

The reset lever 32 is provided with a driven pin 32a driven by the cam 23 and a gear portion 32b. The connection lever 34 has a gear portion 34a that always meshes with the gear portion 32b of the reset lever, a gear support shaft 34b fixed to the distal end portion, and a rotatable and revolvable third gear supported by the gear support shaft 34b. Two planetary gears 36 are provided. Also, as shown in FIG.
The stopper contact portions 34c and 34d are provided on the protrusions on the lower side of the side surface of No. 4.
Is provided.

When the coupling lever 34 is driven to rotate in the CW direction when the first planetary gear 13 of the planetary gear mechanism 71 is at the separated position (second non-transmission position) P13A, the second planetary gear 36 is rotated. Rotates in a CW direction from a separated position P36A released from a seesaw gear portion 42a and the first planetary gear 13, which will be described later. Then, the contact portion 34c of the connecting lever 34 contacts the main body stopper 60 as shown in FIG.
6 is an abutting position P that can mesh with the seesaw gear portion 42a.
Located at 36B. Thereafter, the first planetary gear 13 rotates in the CCW direction and the abutting position (second driving force transmitting position) P
When it rotates to 13B, it is brought into a state of meshing with the second planetary gear 36 (see FIG. 9).

However, even if the connecting lever 34 is driven to rotate in the CW direction when the first planetary gear 13 is previously moved to the abutment position P13B, the contact portion 34c is supported by the first planetary gear support. It interferes with the tip 11a of the shaft 11. Therefore, as shown in FIG. 4, the second planetary gear 36 cannot move to the contact position P36B, and cannot mesh with the seesaw gear portion 42a and the first planetary gear 13.

The shutter opening / closing mechanism 76 includes a support shaft 4
1 and two sectors 5 rotatably supported by the sector support pins 50a and 50b and opening and closing the photographing lens opening 53 on the camera body side.
1, 52, a seesaw spring 43 for urging the seesaw lever 42 in the CCW direction, and an AE-PI 64 for detecting the movement of the leading end 51c of the sector and detecting the open / closed state of the sector.

The seesaw lever 42 includes a seesaw gear portion 42a that can mesh with the second planetary gear 36, and a sector 5
1, 52 are provided with sector drive pins 42b fitted into the drive holes 51b, 52b.

When the seesaw lever 42 is in a closed state (a state in which the seesaw lever 42 is not engaged with the second planetary gear 36), the lever 42 is urged in the CCW direction and its position is regulated by the seesaw stopper 80. Then, the sector drive pin 42b
, The sectors 51 and 52 are held at a shutter closed position that closes the opening 53 (see FIG. 6 and the like). When the seesaw lever 42 is rotationally driven in the CW direction by the second planetary gear 36, the sectors 51 and 52 are rotated by the sector drive pin 42b to the shutter open position where the photographing lens opening 53 is opened (FIG. 10). reference).

The photographing lens driving mechanism 77 is rotatably supported by a support shaft 55b, and includes a gear 55 which is always meshed with the cam gear 22, a feed screw 56 integral with the gear 55, and a driven pin 57a. A lens frame 57 (only a part is shown in FIG. 1) for holding a taking lens (not shown)
Consists of The driven pin 57a is fitted into a thread root 56a of the feed screw 56, and drives the lens frame 57 to advance and retreat between the feeding end and the feeding end with the rotation of the feed screw 56.

An LD spring (not shown) is provided below the gear portion 55 so that the delay gear 18 does not operate due to a sliding load (frictional force) when the power is not transmitted. .

The support shafts 5, 8, 16, 21, 21
31, 33, 41, 55b and sector support pins 50a,
50b, stoppers 58, 59, 60, 80 and each PI
It is assumed that 61, 62, 63, 64 and the like are fixedly supported by the camera body or the drive device body.

Here, the circumferential angle θ0 of the arc-shaped long hole 18b provided in the second delay gear 18 will be described. In the present driving device, the shutter 9 is opened and closed without changing the photographing lens position after being driven once to adjust the extension position (focus adjustment) by rotating and driving the gear 9 integrated with the sun gear 10. To control. To do so, the cam gear 22 is rotated to drive the lens frame 57 to a predetermined position, and then the gear 9 is rotated.
To rotate the first planetary gear 13 from the separation position P13A to the contact position P13B (see FIGS. 3 and 4), and further rotate the first planetary gear 13 to open the shutter. During both periods, it is necessary to keep the second delay gear 18 in a non-rotating state so as to prevent the taking lens from moving forward and backward.

Based on the above conditions, the gear 9 (therefore,
The first planetary gear 13 driven by the sun gear 10) is moved from the separated position P13A (see FIGS. 3 and 6) to the contact position P13.
The rotation angle of the gear 9 required to rotate between B (see FIGS. 4 and 9) is defined as θ1. Further, when the second planetary gear 36 is in mesh with the first planetary gear 13 and the seesaw gear portion 42a, the rotation angle of the gear 9 required to rotate the sectors 51 and 52 from the closed state to the open state is set. θ2. When the gear ratio between the gear 9 and the first delay gear 17 is γ, the angle θ0 (effective angle excluding the diameter of the pin) of the arc-shaped long hole 18b of the second delay gear 18 is θ0 ≧ (θ1 + θ2). × γ.

Next, an electric control circuit in the camera according to the present embodiment, particularly relating to the above-described driving device, will be described with reference to the circuit diagram of FIG. An electric control circuit related to the driving device mainly includes a CPU 81 which is control means for controlling the entire camera, a power supply unit 82, and a release switch 83.
, A motor driver 84, the motor 1, and the cam PI
63, Planet PI62, AE-PI64, Motor PI61
And the light emitting diode driving transistor 8 of each PI
6, 89, 92, and 95; load resistors 87, 90, 93, and 96 of the transistors; and load resistors 88, 91, 94, and 97 of the photodiodes of the PIs.

The drive transmission switching operation of the camera driving apparatus of the present embodiment having the above-described configuration will be described with reference to FIGS. 6 to 17 and FIGS. The explanation will be given while using the same. 6 to 17 are plan views showing the reset state and each driving operation state of the driving device. FIGS.
4 is a time chart showing the movement of each control member of the driving device.

When the camera is in a reset state before the release switch 83 is operated, the driving device is in an initial state shown in FIG. 6 at an elapsed time t1 on the time chart of FIG. In this state, the carrier 12 is rotated in the CW direction and is in contact with the stopper 58, and the first planetary gear 13 is in the separated position P13 at which the second planetary gear 36 cannot mesh.
A The reset lever 32 is connected to the projection 23a of the cam 23.
, The second planetary gear 36 is also at the separated position P36A where it does not mesh with the seesaw gear portion 42a.

The shutter opening / closing mechanism 76 holds the sectors 51 and 52 at a shutter closing position where the opening 53 is closed. The taking lens driving mechanism 77 holds the lens frame 57, that is, the taking lens at the retracted end by rotating the feed screw 56.

Next, when the release switch 83 is operated and a release-on signal is input to the CPU 81 at the elapsed time t2 in the time chart of FIG. 18, the release processing routine of FIG. Photometry and ranging are performed. Then, in step S3, a driving voltage in the CW direction is applied to the motor 1. The application period of the drive voltage is time T1.

As the motor 1 rotates in the CW direction,
The first delay gear 17 rotates in the CCW direction via the gear 9 to bring the drive pin 17a into contact with the end of the elongated hole 18b of the second delay gear 18. Thereafter, the first delay gears 17 and 18 are both rotated in the CCW direction, the cam gear 22 is rotated in the CW direction, and the output signal “H” (ON) is changed from the shielded state to the transmitted state by the cam PI 63 at the elapsed time t3. It is output (state of FIG. 7). If the output is confirmed in step S4, the process proceeds to step S5.

Thereafter, the motor 1 rotates in the CW direction as it is, the first and second delay gears continue to rotate in the CCW direction, and the cam gear 22 also rotates in the CW direction. Feed screw 56
Is driven to rotate by the rotation of the cam gear 22, and the feeding of the lens frame 57 (photographing lens) is started.

In step S5, counting of output pulses (LD pulses) of the motor PI61 is started. If it is determined in step S6 that the number of LD pulses has reached the desired number of pulses or has reached the pulse number Pa corresponding to the predetermined lens frame 57 (photographing lens) movement position, the motor 1 is stopped in step S7. First and second delay gears 17, 18,
The cam gear 22 also stops, and the lens frame 57 stops at the extension position.

The number of LD pulses is the number of pulses for detecting the amount of rotation of the motor, and is used for detecting the amount of movement of the photographing lens and for detecting the rotational position of another mechanism.

The state when the motor 1 is stopped is the state of the elapsed time t4 in FIG. 18 and is shown in FIG. The first and second reset levers 32 and 34 rotate with the rotation of the cam 23 during the driving period T1, and the second planetary gear 36 rotates from the separation position P36A to the contact position P36B, and the seesaw gear It engages with the part 42a.

Subsequently, the process proceeds to step S8, where a low-speed driving voltage in the CCW direction is applied to the motor 1. The application period of the drive voltage is time T2. When the motor 1 is driven at a low speed in the CCW direction, the sun gear 10
Rotate in the CCW direction, and the carrier 12 and the first planetary gear 13 rotate in the CCW direction. During this period, the first delay gear 17 rotates in the CW direction and the drive pin 17a
8b, the first delay gear 17 idles, and the second delay gear 18 does not rotate because it is biased by the LD spring. Therefore, the cam gear 22 is stopped, and the lens frame 57 is held at the above-mentioned extended position.

If the output signal "H" in the transmission state of the planet PI62 is detected in step S9, and it is detected that the carrier 12 rotates in the CCW direction, the process proceeds to step S10.

The low-speed drive voltage of the motor 1 can move the carrier 12 and the first planetary gear 13 to the abutment position and keep the sectors 51 and 52 at the closed position, that is, the seesaw spring 43. It is set to a voltage that outputs a torque smaller than the urging force.

In step S10, counting of output pulses (LD pulses) of the motor PI61 is started. Motor 1
Continues the low-speed driving in the CCW direction, the carrier 12 contacts the stopper 59, and the first planetary gear 13 contacts the contact position P13B. When it comes in contact with the set voltage,
Since the seesaw gear 42 is not driven in the sector opening direction,
a, The second planetary gear 36 is locked with play.

When the lock is established, the motor PI61
The output pulse (LD pulse) is no longer output, and it is recognized that the reference position before the shutter opening operation has been reached (step S11), and the motor 1 is temporarily stopped in step S12 (elapsed time t5 in FIG. 18). 9 in FIG. 9).

Subsequently, at step S13, the motor 1
A full drive voltage in the CW direction is applied. This drive voltage application period is set to time T3 (corresponding to shutter time).
Seesaw lever 4 by full drive of motor 1 in CCW direction
2 rotates in the CW direction, and the sectors 51 and 52 are driven in the opening direction at high speed. If it is detected in step S14 that the output signal of the AE-PI 64 is "H", it is determined that the lens opening 53 has begun to open, and the counting of the shutter time T is started in step S15. If it is detected in step S16 that the shutter time T has reached the predetermined T3, the process proceeds to step S17.

During the rotation of the motor 1 in the CCW direction, the first planetary gear 13 is in the contact position P13B where the second planetary gear 36 meshes, and the second planetary gear 36 is in the seesaw gear portion 42a. The contact position P where each meshes
The rotation of the first planetary gear 13 is transmitted to the seesaw gear portion 42a. On the other hand, the first delay gear 17
The drive pin 17a idles in the CW direction while moving in the elongated hole 18b of the second delay gear 18. Therefore, the cam gear 22 is stopped, and the lens frame 57 is not driven forward or backward.

In step S17, the driving of the motor 1 in the CCW direction is stopped. Subsequently, in step S18, application of a drive voltage in the CW direction to the motor 1 is started. The voltage application period is time T4. The motor 1 is stopped at an elapsed time t6 in FIG. 18 with a slight delay, and starts rotating in the CW direction. FIG. 10 shows a state at the elapsed time t6 after the shutter time T3, and shows a state in which the sectors 51 and 52 have been rotated to the fully open end of the shutter opening 53.

FIG. 11 shows the elapsed time t7 in FIG.
3 shows the shutter closed state. In this state, the sun gear 10 rotates in the CW direction due to the rotation of the motor 1 in the CW direction, and the first planetary gear 13 rotates in the CCW direction. Since the first planetary gear 13 rotates in the CCW direction, the seesaw lever 42 rotates in the CCW direction by the urging force of the seesaw spring 43 to rotate the sectors 51 and 52 to the closed position.

The sectors 51 and 52 are closed and the lens opening 53 is closed.
Is closed, the carrier 12 rotates in the CW direction and contacts the stopper 58, and the output signal of the planet PI62 switches to "L" (off). In this state, the first planetary gear 13 moves to the separated position P13A, and the engagement with the second planetary gear 36 is released. Further, by driving the motor 1 in the CW direction, the first delay gear 17 reverses in the CCW direction and idles with respect to the second delay gear 18. Thereafter, the drive pin 17a comes into contact with the end of the elongated hole 18b of the second delay gear 18. The above state corresponds to the elapsed time t in FIG.
8 is shown in FIG.

Thereafter, the driving of the motor 1 in the CW direction is continued, the first and second delay gears 17 and 18 integrally start rotating in the CCW direction, and the cam gear 22 rotates in the CW direction. By the rotation of the cam gear 22, the feed screw 56 rotates in the CCW direction via the screw gear 55, and the lens frame 57 is driven in the extending direction.

Further, since the reset lever 32 comes into contact with the projection 23a of the cam 23, the reset lever 34
The gear rotates in the W direction, and the second planetary gear 36 moves to the separated position P36A.
Go to

When the lens frame 57 reaches the feed-out end (closest position) by the feed-out drive by the feed screw 56 and it is detected in step S19 that the output signal of the cam PI 63 has become "L", step S20 is performed. To start counting output pulses (LD pulses) of the motor PI61 for driving with a predetermined margin. Step S21
If it is detected that the count number has reached the predetermined pulse number PC, the motor 1 is temporarily stopped in step S22. The above state is the state of the elapsed time t9 in FIG. 19 and is shown in FIG.

Then, the process proceeds to a step S23, wherein the motor 1
Is applied with a driving voltage in the CCW direction. The drive voltage application period is time T5. When the motor 1 starts rotating in the CCW direction, the first delay gear 17 rotates in the CW direction,
It runs idle for a predetermined period with respect to the second delay gear 18. After idling,
Since the cam gear 22 rotates in the CCW direction together with the second delay gear 18 in the CW direction, the screw gear 55 is driven in the CW direction by the rotation, and the lens frame 57 is retracted.

In step S24, the output signal "H" of the cam PI 63 is detected, and the process proceeds to step S25 to continue driving the motor 1 in the CCW direction. Step S26
If the output signal “L” of the cam PI 63 is detected at step S, it is determined that the lens frame 57 has arrived at the retraction end,
Proceed to 27.

In step S27, the output pulse (LD pulse) of the motor PI61 is counted while rotating the motor 1 in the CCW direction to further rotate the cam gear 22 in the CCW direction by a predetermined margin. Step S2
8, if it is detected that the output pulse number has reached the predetermined pulse number Pd, the process proceeds to step S29,
To stop.

During the lens frame retracting drive period, when the second planetary gear 36 is at the separated position P36A, the motor 1
The carrier 12 rotates in the CCW direction together with the sun gear 10 due to the rotation in the CCW direction of FIG.
The first planetary gear 13 also moves to the contact position P13B.

When the cam gear 22 rotates in the CCW direction and the driven pin 32a of the reset lever 32 is in a phase other than the projection 23a of the cam 23, the connecting lever 3
4 is urged in the CW direction by the urging force of the connecting lever spring 37, and the second planetary gear 36 attempts to rotate to the contact position P36B. However, since the engaging portion 34d of the connecting lever 34 abuts on the tip end 11a of the gear support shaft 11 of the first planetary gear 13 at the contact position P13A, the second planetary gear 36
Stops at the position P13A 'near the separation position P36A, and is prevented from moving to the contact position P36B (see FIGS. 4 and 15).

Therefore, during this period, the first planetary gear 1
The rotation force in the CW direction 3 is not transmitted to the seesaw lever 42 side, and the sectors 51 and 52 are not opened. The above state is the state of the elapsed time t10 to t12 in FIG. 19, and is shown in FIGS.

Subsequently, in step S30, the motor 1
, A driving voltage in the CW direction is applied. The application period of the drive voltage is time T6. When the motor 1 rotates in the CW direction, the first delay gear 17 rotates in the CCW direction. First
The drive pin 17a of the delay gear 17 moves in the long hole 18b of the second delay gear 18, and CC between the drive pin 17a and the second delay gear 18
A state is set in which there is a predetermined amount of play in the W direction. Further, by driving the sun gear 10 in the CW direction, the carrier 1
2 is rotated in the CW direction, and the first planetary gear 13 is returned to the separated position P13A. The driven pin 32a of the reset lever 32 abuts on the projection 23a of the cam 23, and the coupling lever 34 is rotated in the CCW direction.
6 is also located at the separation position P36A.

In step S31, the output pulses (LD pulses) of the motor PI61 are counted, and if it is detected in step S32 that the count number matches the predetermined pulse number Pe, it is determined that each reset operation described above has been completed. Then, the release process by the driving device of the present embodiment ends. The above state is the state of the elapsed time t13 in FIG. 19 and is shown in FIG.

According to the camera driving device of the present embodiment,
Without using an actuator such as an electromagnet, the motor 1 as a single driving source drives the lens frame 57 of the photographing lens driving mechanism 77 as a plurality of driven parts in both forward and backward directions and the sectors 51 and It is possible to switch and execute the drive of both directions of opening and closing of 52. Further, the indexing position in the advance / retreat driving of the photographing lens can be set finely, and there is no restriction on the focus adjustment position accuracy.

According to the embodiments of the present invention described above, (1) a driving source, a sun gear rotated by the driving source, meshing with the sun gear, and a position of the driving force depending on a rotation direction of the sun gear. A planetary gear movable to a transmitting position and a non-transmitting position, and directly to the sun gear,
Alternatively, a driven gear which is indirectly meshed and driven, a cam means which is interlocked with the movement of the driven gear, and a second driving force which can be moved to a non-transmission position and a driving force transmission position which is interlocked with the cam means. And a planetary gear.

[0063]

As described above, according to the camera driving apparatus of the present invention, a plurality of driven parts can be driven by switching in both directions by a single driving source and without using an actuator such as an electromagnet. It is possible to provide a mechanism having a simple configuration with little restriction on the indexing position of the driven portion.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a camera driving device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view around a first and second planetary gears in the camera driving device of the embodiment.

FIG. 3 is a plan view around the first and second planetary gears in the camera driving device according to the embodiment, and shows a state in which the gears can mesh with each other.

FIG. 4 is a plan view around the first and second planetary gears in the camera driving device according to the embodiment, showing a state where the gears cannot mesh with each other.

FIG. 5 is a circuit diagram of an electric control circuit built in the camera driving device of the embodiment.

FIG. 6 is a plan view of the camera driving device according to the embodiment in a reset state.

FIG. 7 is a plan view showing a state after the release of the camera driving device according to the embodiment.

FIG. 8 is a plan view of the camera driving device according to the embodiment when the taking lens is extended.

FIG. 9 is a plan view of the camera driving device according to the embodiment when the first planetary gear is switched and the sector is started.

FIG. 10 is a plan view of the camera driving device according to the embodiment in a sector open state.

FIG. 11 is a plan view of the camera driving device according to the embodiment in a sector closed state.

FIG. 12 is a plan view of the camera driving device according to the embodiment in a state where the photographing lens is extended and restarted.

FIG. 13 is a plan view of the camera driving device according to the embodiment after the photographing lens has been extended.

FIG. 14 is a plan view of the camera driving device of the embodiment in a state where the first planetary gear is switched.

FIG. 15 is a plan view of the camera driving device according to the embodiment when the photographing lens is started to be retracted.

FIG. 16 is a plan view of the camera driving device according to the embodiment when the photographing lens has been retracted.

FIG. 17 is a plan view of the camera driving device according to the embodiment when it is returned to an initial reset state.

FIG. 18 is a time chart (first half) in a release process of the camera driving device according to the embodiment.

FIG. 19 is a time chart (second half) in a release process of the camera driving device according to the embodiment.

FIG. 20 is a part of a flowchart of a release process of the camera driving device of the embodiment.

FIG. 21 is a part of a flowchart of a release process of the camera driving device of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Motor (drive source) 10 ... Sun gear 12 ... Carrier (1st moving member) 13 ... 1st planetary gear (1st planetary gear) 22 ... Cam gear (driven gear) 23 ... Cam (cam means) 34 Connecting lever (second moving member) 36 Second planetary gear (second planetary gear) P13A ... Separated position (first non-transmission position) P13B ... Contact position (First driving force transmission position) P36A ... separation position (second non-transmission position) P36B ... contact position (second driving force transmission position)

Claims (3)

[Claims] A first driving force that meshes with the sun gear and whose position transmits the driving force of the driving source depending on the rotation direction of the sun gear; A first planetary gear that is movable to a transmission position and a first non-transmission position that does not transmit the driving force of the drive source; a driven gear that is driven in mesh with the sun gear; and a movement of the driven gear. A second driving force transmitting position capable of receiving a driving force from the first planetary gear at the first driving force transmitting position in conjunction with the cam means; A second planetary gear that is movable to a second non-transmission position where the first planetary gear cannot receive driving force from the first planetary gear, and the first planetary gear has the first non-transmission After moving from the position to the first driving force transmission position A driving device for a camera, wherein the second planetary gear is prohibited from moving from the second non-transmission position to the second driving force transmission position. 2. A driving source, a sun gear rotated by the driving source, a first moving member that rotates around the center of rotation of the sun gear, and a rotatably pivotally supported by the first moving member. A first driving force transmitting position at which the sun gear engages with the sun gear and the position of which transmits the driving force of the driving source according to a rotational direction of the sun gear; and a first non-transmitting position at which the driving force of the driving source does not transmit. A first planetary gear that can revolve with the sun gear; a driven gear that is driven in mesh with the sun gear; a cam that interlocks with the movement of the driven gear; and a second moving member that interlocks with the cam. A second driving force transmitting position rotatably supported by the second moving member and capable of receiving driving force from the first planetary gear at the first driving force transmitting position; Receiving the driving force from the first planetary gear. The second is not possible
And a second planetary gear that can revolve to a non-transmission position of the first planetary gear. After the first planetary gear moves from the first non-transmission position to the first driving force transmission position, the second planetary gear When the second planetary gear attempts to move from the second non-transmission position to the second driving force transmission position, the second moving member is regulated by the first moving member, and the second planetary gear is moved. Cannot be located at the second driving force transmission position. 3. A driving source, a sun gear rotated by the driving source, a first moving member that rotates around a rotation center of the sun gear, and a rotatably pivotally supported by the first moving member. A first driving force transmitting position at which the sun gear engages with the sun gear and the position of which transmits the driving force of the driving source according to the rotational direction of the sun gear; and a first non-transmitting position at which the driving force of the driving source is not transmitted. A first planetary gear that can revolve with the sun gear; a driven gear that is driven in mesh with the sun gear; a cam unit that is interlocked with the movement of the driven gear; and a second moving member that is interlocked with the cam unit. A second driving force transmitting position rotatably supported by the second moving member and capable of receiving a driving force from the first planetary gear at the first driving force transmitting position; Receiving the driving force from the first planetary gear. The second is not possible
A second planetary gear that can revolve to a non-transmission position, and control means for controlling a rotation direction of the drive source, wherein the first planetary gear moves from the first non-transmission position to the first planetary gear from the first non-transmission position. After the second planetary gear moves from the second non-transmission position to the second driving force transmission position after moving to the first driving force transmission position, the second moving member is moved to the first driving force transmission position. Wherein the second planetary gear cannot be located at the second driving force transmission position because of the movement of the second planetary gear.