JP5970201B2 - Position control device for anti-vibration insertion / removal optical element - Google Patents

Description

  The present invention relates to a position control device for an optical element capable of image stabilization drive for image blur correction and drive out of the image stabilization range.

  Conventionally, an anti-vibration driving device using a voice coil motor includes a restraint frame in which a position in the optical axis orthogonal direction is restrained, and an anti-vibration movable frame (anti-vibration lens) supported on the restraint frame so as to be movable in the optical axis orthogonal direction. ) And an anti-vibration drive actuator (anti-vibration coil), and the anti-vibration movable frame is driven and controlled within the plane orthogonal to the optical axis with respect to the restraining frame by energization control of the anti-vibration drive actuator (anti-vibration coil). ing. In such an anti-vibration drive device, since there is no action to hold the anti-vibration movable frame at a specific position when the anti-vibration drive actuator (anti-vibration coil) is not energized, in order to suppress the shakiness of the anti-vibration movable frame, There is a case where the vibration-proof movable frame is locked with respect to the restraint frame using another member.

  For example, in Patent Document 1, a movement limiting member (lock shaft) that rotates in a plane orthogonal to the optical axis and moves between a movement limiting position and a movement limit releasing position of a vibration-proof movable frame (vibration-proof lens) is provided. When the vibration drive actuator (anti-vibration coil) is not energized, the anti-vibration movable frame (anti-vibration lens) is locked by positioning the movement restriction member at the movement restriction position. In Patent Document 2, a return magnet that is a separate member from the vibration-proof magnet of the vibration-proof drive actuator is provided, and the vibration-proof movable frame ( Anti-vibration lens) is centered.

  On the other hand, for the purpose of making the lens barrel compact (thinning), a technique has been proposed in which the vibration-proof lens is moved away from the optical axis in a housed state in which shooting is not performed. For example, in Patent Document 3, an anti-vibration lens is rotatably supported on an anti-vibration movable frame that moves in a plane orthogonal to the optical axis by an anti-vibration drive actuator (anti-vibration coil), and the anti-vibration is movable by a main actuator (zoom motor). After starting to move the frame from the shooting position to the storage position, first center the anti-vibration movable frame with the anti-vibration drive actuator, then fix it with the stopper member, then turn off the anti-vibration drive actuator, and finally anti-vibration The lens is moved away from the optical axis by a cam bar (detachment drive mechanism).

JP 2010-271607 A JP 2010-128389 A JP 2007-206210 A

  However, in the configuration of Patent Document 3, the main body actuator starts moving the vibration-proof movable frame while the vibration-proof drive actuator is energized. As a result of continuing to drive the motor to move it to the initial position, an excessive current flows through the vibration-proof coil, which may break the vibration-proof drive actuator or consume useless power.

  The present invention has been completed on the basis of the above awareness of the problem, and the vibration-proof drive is caused by an excessive current flowing in the vibration-proof coil during the storage movement of the vibration-proof movable frame including the detachment movement of the vibration-proof lens. An object of the present invention is to obtain a position control device for an anti-vibration insertion / removal optical element capable of preventing the actuator for use from being broken or consuming unnecessary electric power.

According to a first aspect of the present invention, there is provided a position control device for an anti-vibration insertion / removal optical element. In the first aspect, the imaging optical system having the anti-vibration insertion / removal optical element; A main actuator that drives the advancing / retracting frame between the photographing position and the storage position ; an anti-vibration movable supported by the advancing / retreating frame so as to be movable in a direction perpendicular to the optical axis of the photographing optical system. A vibration-proof coil and a vibration-proof magnet provided on one and the other of the advance / retreat frame and the vibration-proof movable frame, and the vibration-proof movable frame is placed on the optical axis with respect to the advance / retreat frame by energization control of the vibration-proof coil. An anti-vibration drive actuator that drives and controls in an orthogonal plane; an insertion / removal frame that holds the anti-vibration insertion / removal optical element; the insertion / removal frame on the optical axis of the photographing optical system at the photographing position. At the insertion position where the academic element is located and above the storage position Supported by the anti-vibration movable frame so as to be movable between a detaching position for detaching the anti-vibration insertion / removal optical element from the optical axis of the photographic optical system; when moving from the retracted position disengaged drive mechanism moves the insertion and removal frame engaged with the insertion and removal frame (the image stabilization inserting and removing the optical element) to the disengaged position from the insertion position; this detachment driving mechanism, said When the insertion / removal frame is moved from the insertion position to the separation position via the separation drive mechanism, the anti-vibration movable frame is moved in the direction of the separation position of the insertion / removal frame, and the separation drive mechanism In a state where the insertion / removal frame is held at the disengagement position, the vibration isolation movable frame is held at a specific position in the plane orthogonal to the optical axis; in the drive state of the vibration isolation drive actuator energized to the vibration isolation coil, the main Actue Input means for inputting a storage instruction signal from the shooting position to the storage position of the advance / retreat frame by the controller; and when the input means inputs the storage instruction signal, the main actuator stores the advance / retreat frame from the shooting position. Before moving the insertion / removal frame from the insertion position to the separation position via the separation drive mechanism by moving it toward the position, the power supply to the vibration isolation coil is turned off to move the vibration isolation drive actuator from the drive state. And a control means for switching to a non-driven state.

According to a second aspect of the position control device for the vibration-proof insertion / removal optical element of the present invention, a photographing optical system having the vibration-proof insertion / removal optical element; between the photographing position in the optical axis direction of the photographing optical system and the storage position A main actuator that drives the advancing / retracting frame between the photographing position and the storage position; an anti-vibration movable supported by the advancing / retreating frame so as to be movable in a direction perpendicular to the optical axis of the photographing optical system. A vibration-proof coil and a vibration-proof magnet provided on one and the other of the advance / retreat frame and the vibration-proof movable frame, and the vibration-proof movable frame is placed on the optical axis with respect to the advance / retreat frame by energization control of the vibration-proof coil. An anti-vibration drive actuator that drives and controls in an orthogonal plane; an insertion / removal frame that holds the anti-vibration insertion / removal optical element; the insertion / removal frame on the optical axis of the photographing optical system at the photographing position. At the insertion position where the academic element is located and above the storage position It is supported by the anti-vibration movable frame so as to be movable between a separation position for removing the anti-vibration insertion / removal optical element from the optical axis of the photographing optical system; between the advance / retreat frame and the anti-vibration movable frame An anti-vibration guide member provided to permit movement of the anti-vibration movable frame in a plane orthogonal to the optical axis in a state of being held in the optical axis direction by the advance / retreat frame and the anti-vibration movable frame; An anti-vibration movable frame urging member that urges close to the optical axis direction to maintain the clamped state of the anti-vibration guide member; an insertion / removal frame urging member that urges the insertion / removal frame toward the insertion position; Movement limiting means for restricting the movement range of the vibration-proof movable frame in the direction of the separation position; the movement resistance in the direction of the separation position applied to the insertion / removal frame by the insertion / removal frame biasing member Transfer between the anti-vibration guide member provided to the anti-vibration movable frame by the movable frame urging member. Greater than resistance; when the advance / retreat frame is moved from the photographing position to the storage position by the main actuator, the insertion / removal frame (anti-vibration insertion / removal optical element) is engaged with the insertion / removal frame and the insertion position is A detachment drive mechanism for moving from the position to the detachment position; the detachment drive mechanism moves the anti-vibration movable frame in the direction of the detachment position together with the insertion / removal frame until the movement restriction by the movement restriction means is received, and then the movement restriction Means for moving the insertion / removal frame alone to the disengagement position with the vibration-proof movable frame held at a specific position in the plane orthogonal to the optical axis by means; Input means for inputting a storage instruction signal from the shooting position to the storage position of the advance / retreat frame by the main actuator in the driving state; and the input means is the storage finger When an indication signal is input, the main actuator moves the advance / retract frame from the shooting position toward the storage position, and moves the insertion / removal frame from the insertion position to the removal position via the separation drive mechanism. And a control means for switching off the anti-vibration drive actuator from the drive state to the non-drive state by cutting off the energization to the anti-vibration coil.

The anti-vibration guide member can be composed of a guide ball.

When the input means inputs the storing instruction signal, the control means cuts off the power supply to the vibration isolation coil and switches the vibration isolation drive actuator from the drive state to the non-drive state. The advance / retreat frame can be moved from the shooting position toward the storage position.

When the input means receives the storage instruction signal, the control means may send the storage drive instruction signal to the main actuator after sending the vibration isolation coil energization release instruction signal to the vibration isolation drive actuator. it can.

The main actuator can be composed of a zoom motor.

The detachment drive mechanism includes a detachment drive lever that rotates about a rotation axis that is parallel to the optical axis of the imaging optical system, and a detachment pressing protrusion that is fixed to the position control device. When the advance / retreat frame moves from the shooting position to the storage position, the release pressing protrusion presses the release drive lever, and the release drive lever presses the insertion / removal frame, thereby It can be moved from the insertion position to the withdrawal position.

  According to the position control device for the vibration-proof insertion / removal optical element of the present invention, in the driving state of the vibration-proof drive actuator energized in the vibration-proof coil, the storage instruction signal from the photographing position of the advance / retreat frame by the main actuator to the storage position is input. Before moving the insertion / removal frame (anti-vibration insertion / removal optical element) from the insertion position to the separation position via the separation drive mechanism by moving the advance / retreat frame from the photographing position to the storage position by the main actuator, Since the vibration-proof drive actuator is switched from the drive state to the non-drive state by de-energizing the vibration-proof coil, an excessive current is applied to the vibration-proof coil during the storage movement of the vibration-proof movable frame including the movement of the vibration-proof lens. It is possible to prevent the vibration-proof drive actuator from being broken or consuming wasteful power due to the flow of.

It is the disassembled perspective view which looked at the anti-vibration lens block to which this invention was applied from back. It is the perspective view which looked at the anti-vibration lens block of the state which removed the sensor holder and the rectilinear moving ring from back. It is the perspective view which looked at the anti-vibration lens block and the separation | desorption press protrusion in the middle of the accommodation operation | movement of a lens barrel from the back. It is a perspective view which shows the relationship between the insertion / removal frame in the imaging | photography state, and the separation drive lever. It is the perspective view which showed the insertion / removal frame in the imaging | photography state, and the separation drive lever from another angle. It is the figure which looked at the principal part of the vibration-proof lens block in a photographing state from the image plane side. It is the figure which extracted and showed the part and coil which are driven at the time of shake correction from FIG. It is the figure which highlighted and showed the component of the vibration proof drive actuator from FIG. It is the figure which looked at the principal part of the anti-vibration lens block in the accommodation state from the image plane side. It is the figure which extracted and showed the part and coil which are driven at the time of shake correction from FIG. It is the figure which emphasized and showed the component of the vibration proof drive actuator from FIG. It is the figure which looked at the anti-vibration lens block in the imaging | photography state from the image surface side except the rectilinear advance / retraction ring and the sensor holder. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is a block diagram which shows the outline of a circuit structure of a zoom lens barrel. It is a flowchart for demonstrating drive control of the zoom motor (main actuator) and coil (anti-vibration drive actuator) by a control circuit. It is the disassembled perspective view which looked at the lens block which concerns on another embodiment of this invention from back. It is a front perspective view of the vibration proof unit which supports the vibration proof insertion / removal lens. It is the disassembled perspective view which looked at the anti-vibration unit which supports an anti-vibration insertion / removal lens from the front.

  The anti-vibration lens block 10 shown in FIGS. 1 to 3 supports an anti-vibration insertion / removal lens (anti-vibration insertion / removal optical element) 12 that constitutes a part of the photographing optical system of the lens barrel. As shown in FIG. 2, a shutter unit (advance / retract frame) 16, an anti-vibration frame (anti-vibration movable frame) 18, an insertion / removal frame 20, a sensor holder 22, a release drive lever (detachment drive mechanism) ) 24, and a structure including an anti-vibration drive actuator 26 and the like.

  Although the entire structure of the lens barrel provided with the anti-vibration lens block 10 is not shown, the rectilinear moving ring 14 can move linearly in the lens barrel in the direction along the photographic optical axis O of the photographic optical system. The lens barrel is moved from the subject side toward the image plane side when the lens barrel is changed from the photographing state to the retracted state. As shown in FIG. 15, the forward / backward movement of the rectilinear movement ring 14 is performed when the photographing instruction signal (when the main switch 61 is turned on) or the storage instruction signal (when the main switch 61 is turned off) input from the main switch (input means) 61. The control circuit (control means) 60 that has received () sends a photographing drive instruction signal or a storage drive instruction signal to the zoom motor (main actuator) 62. Details of drive control of the zoom motor 62 by the control circuit 60 will be described later. In the following description, in the direction along the photographing optical axis O, the subject side is referred to as the front, and the image plane side is referred to as the rear. A known cam mechanism or the like can be applied as a mechanism for moving the rectilinear moving ring 14 in the optical axis direction.

  The rectilinear moving ring 14 has a cylindrical portion 14a surrounding the photographing optical axis O, and a shutter unit 16 is fixed inside thereof. The shutter unit 16 has a photographing opening 16b (FIG. 1) penetrating in the optical axis direction at the center of a shutter housing 16a containing a shutter (not shown), and opens and closes the photographing opening 16b by driving the shutter with a built-in shutter actuator. Let The outer peripheral portion of the shutter housing 16a is provided with three spring hooking protrusions 16c (only one is shown in FIGS. 1 and 2) with different positions in the circumferential direction, and on the rear surface of the shutter housing 16a, Two movement restriction protrusions (movement restriction means) 16d and three ball support holes 16e are formed. The ball support hole 16e is a bottomed concave portion opened rearward (see FIG. 13).

  A vibration isolating frame 18 is supported at the rear part of the shutter unit 16. As shown in FIG. 13, the vibration isolating frame 18 has a ball contact surface 18a formed on the front side facing the shutter unit 16, and a guide ball between the ball contact surface 18a and the bottom surface of the ball support hole 16e. (Anti-vibration guide member) 28 is sandwiched. As described above, the shutter unit 16 has three ball support holes 16e, and the ball contact surface 18a and three guide balls 28 are also provided correspondingly (three locations). The ball contact surface 18a is a smooth flat surface that is substantially orthogonal to the photographing optical axis O. The guide ball 28 is loosely fitted in the ball support hole 16e in the direction orthogonal to the optical axis, and the guide ball 28 does not contact the inner wall of the ball support hole 16e when positioned near the center of the ball support hole 16e. .

  Three spring hooking protrusions 18b are provided on the outer peripheral portion of the vibration isolating frame 18 at different positions in the circumferential direction, and a tension spring is provided between each spring hooking protrusion 18b and three spring hooking protrusions 16c provided on the shutter unit 16. A (vibration-proof movable frame biasing member) 30 is stretched. The anti-vibration frame 18 is urged in the direction (front) approaching the shutter unit 16 by the urging force of the three tension springs 30, and the ball contact surface 18 a is brought into contact with the guide ball 28, thereby Forward movement is restricted. In this state, the three ball contact surfaces 18a are in point contact with the three guide balls 28, respectively, and by sliding the point contact portions (or the guide balls 28 inside the ball support holes 16e). The anti-vibration frame 18 can freely move in a direction perpendicular to the photographing optical axis O while the guide ball 28 rolls when not in contact with the wall.

  The anti-vibration frame 18 is also formed with two movement restriction holes (movement restriction means) 18c for inserting two movement restriction protrusions 16d provided on the shutter unit 16. As shown in FIGS. 6 to 12, each movement limiting hole 18 c has a rectangular inner surface shape that is substantially square in a plane orthogonal to the photographing optical axis O. Hereinafter, one diagonal direction of the inner wall of each movement limiting hole 18c in the optical axis orthogonal plane is referred to as an X axis, and the other diagonal direction is referred to as a Y axis. The anti-vibration frame 18 is freely movable with respect to the shutter unit 16 (straight forward moving ring 14) in a plane perpendicular to the photographing optical axis O until the movement restriction projection 16d comes into contact with the inner surface of the movement restriction hole 18c. Can move.

  The anti-vibration frame 18 is driven by an anti-vibration drive actuator 26. The anti-vibration drive actuator 26 includes two coils (anti-vibration coils) 31 and 32 supported on the shutter unit 16 side and two permanent magnets (anti-vibration magnets) 34 and 36 supported on the anti-vibration frame 18 side. Have. The permanent magnets 34 and 36 are fixed to magnet holding portions 18d and 18e provided on the vibration isolation frame 18, respectively. The shapes and sizes of the permanent magnets 34 and 36 are substantially the same, are each formed into an elongated rectangular thin plate shape, and have a symmetrical relationship with respect to a virtual plane P (FIGS. 6 to 12) passing through the photographing optical axis O and along the Y axis. It is arranged with. More specifically, each of the permanent magnets 34 and 36 has an N-pole, one of the halved regions divided by the magnetic pole boundary lines M1 and M2 (FIGS. 8 and 11) passing through the approximate center in the short direction and facing the longitudinal direction. The other is the S pole, and the magnetic pole boundary line M1 of the permanent magnet 34 and the magnetic pole boundary line M2 of the permanent magnet 36 are above (described later) from below in the Y-axis direction (insertion side of the insertion / removal frame 20 described later). As it moves toward the separation position side of the insertion / removal frame 20, it is inclined so as to be separated from each other. The inclination angle of the magnetic pole boundary line M1 of the permanent magnet 34 and the magnetic pole boundary line M2 of the permanent magnet 36 with respect to the virtual plane P is set to about 45 degrees in the forward and reverse directions. That is, the permanent magnet 34 and the permanent magnet 36 have a relationship in which their longitudinal directions (magnetic pole boundary lines M1, M2) are substantially orthogonal.

  As shown in FIGS. 1, 8 and 11, the coils 31 and 32 are air-core coils having a pair of substantially parallel long side portions and a pair of curved portions connecting the long side portions. The size is substantially the same. A pair of positioning protrusions 16f and 16g project from the rear surface of the shutter housing 16a (FIG. 1), and the coil 31 is supported by the shutter unit 16 in such a manner that the pair of positioning protrusions 16f are engaged with the air core. The coil 32 is supported by the shutter unit 16 in such a manner that the pair of positioning protrusions 16g are engaged with the air core portion. In this supported state, the major axis direction of the coil 31 is substantially parallel to the magnetic pole boundary line M1 of the permanent magnet 34, and the major axis direction of the coil 32 is substantially parallel to the magnetic pole boundary line M2 of the permanent magnet 36. As shown in FIG. 15, the coil 31 and the coil 32 are connected to a control circuit 60 on the control board of the camera via a flexible board (not shown) extending from the shutter unit 16. The energization is controlled by a signal or an energization release instruction signal. Details of energization control of the coil 31 and the coil 32 (anti-vibration drive actuator 26) by the control circuit 60 will be described later.

  In the anti-vibration drive actuator 26 having the above configuration, the coil 31 and the permanent magnet 34 face each other in the optical axis direction, and when the coil 31 is energized, the magnetic pole boundary line of the permanent magnet 34 in a plane orthogonal to the imaging optical axis O. A driving force in a direction substantially orthogonal to M1 (long axis direction line of the coil 31) acts. The acting direction of this driving force is F1 (FIGS. 8, 11 and 12). Further, as shown in FIG. 14, the coil 32 and the permanent magnet 36 are opposed to each other in the optical axis direction. When the coil 32 is energized, the magnetic pole boundary M2 (coil) of the permanent magnet 36 in a plane orthogonal to the photographing optical axis O is obtained. A driving force in a direction substantially orthogonal to (32 major axis direction lines) acts. The direction of action of this driving force is F2 (FIGS. 8, 11, and 12). The directions F1 and F2 of the driving force intersect with each other at an angle of about 45 degrees with respect to both the X axis and the Y axis. By controlling the energization of the coils 31 and 32, the imaging optical axis O and The anti-vibration frame 18 can be moved to an arbitrary position within an orthogonal plane. As described above, the movement range is restricted by the movement restriction hole 18c coming into contact with the inner surface of the movement restriction protrusion 16d.

  A sensor holder 22 is fixed to the rear portion of the vibration isolation frame 18. The sensor holder 22 has a shape that covers the rear portions of the magnet holding portions 18 d and 18 e, and holds a position detection sensor 38 that is located behind the permanent magnet 34 and a position detection sensor 40 that is located behind the permanent magnet 36. The position detection sensor 38 and the position detection sensor 40 can detect the drive position of the vibration isolation frame 18 by the vibration isolation drive actuator 26. As shown in FIG. 15, the position detection sensor 38 and the position detection sensor 40 are connected to a control circuit 60 on the control board of the camera via a flexible board (not shown) extending from the shutter unit 16, so A position detection signal of the shaking frame 18 is output to the control circuit 60.

  An insertion / removal frame 20 is supported on the vibration isolation frame 18 so as to be rotatable (swingable) about a rotation axis 42 parallel to the photographing optical axis O. Both ends of the rotation shaft 42 are fixed to a shaft support hole 18 f provided in the vibration isolation frame 18 and a retaining member 44 fixed to the vibration isolation frame 18. The insertion / removal frame 20 includes a lens holding cylinder portion 20a for holding the vibration-proof insertion / removal lens 12, a shaft hole portion 20b having a shaft hole through which the rotation shaft 42 is inserted, a lens holding cylinder portion 20a, and a shaft hole portion 20b. The arm part 20c to connect is provided. The insertion / removal frame 20 can swing between the insertion position shown in FIGS. 2 to 8 and 12 and the separation position shown in FIGS. 9 to 11, and a lens is attached to a stopper 18 g provided on the vibration isolation frame 18. The insertion position is determined by abutting a stopper abutting portion 20d provided on the holding cylinder portion 20a. An insertion / removal frame biasing spring (insertion / removal frame biasing member) 46 made of a torsion coil spring having one end and the other end locked to the vibration isolating frame 18 and the insertion / removal frame 20 is inserted into the insertion / removal frame 20 in the direction of the insertion position. Is energized. Further, the insertion / removal frame 20 is biased forward by an optical axis direction biasing spring 48 formed of a compression spring inserted between the shaft hole portion 20b and the retaining member 44, and the position in the optical axis direction is stabilized.

  When the insertion / removal frame 20 is in the insertion position, the vibration-proof insertion / removal lens 12 is positioned on the photographing optical axis O. A movement restricting position in the Y-axis direction (hereinafter, referred to as “vibration restricting frame 18”) where the movement restricting protrusion 16 d is brought into contact with the end portion on the insertion position side (the lower end portion in FIGS. 6 to 12) of the inner surface of the movement restricting hole 18 c. When the insertion / removal frame 20 is rotated to the separation position in a state of being referred to as a separation assistance position, the center of the vibration-proof insertion / removal lens 12 is displaced in the Y-axis direction with respect to the photographing optical axis O. An escape hole 18h having a shape corresponding to the movement locus of the lens holding cylinder portion 20a at this time (an arcuate locus centering on the rotation shaft 42) is formed in the vibration isolation frame 18 so as to penetrate in the optical axis direction. The front end portion of the lens holding cylinder portion 20a enters the escape hole 18h. The escape hole 18h penetrates (opens) the outer peripheral portion of the vibration isolation frame 18, and a bridge portion 18i that reinforces the opening portion of the escape hole 18h is provided. The bridging portion 18i is formed so as to be offset rearward so that it does not interfere with the lens holding cylinder portion 20a when the insertion / removal frame 20 is rotated to the removal position.

  A detachment drive lever 24 is supported in the rectilinear moving ring 14 so as to be rotatable (swingable) about a rotation axis 50 parallel to the photographing optical axis O. The rotation shaft 50 is formed in the vicinity of the rotation shaft 42 and formed integrally with the rectilinear movement ring 14, and is inserted into a shaft hole formed in the shaft hole portion 24 a of the detachment drive lever 24. A retaining plate 52 is fixed to the rear portion of the rectilinear moving ring 14 to restrict the rearward movement of the separation drive lever 24. The detachment drive lever 24 has a detachment pressing portion 24c near the tip of an arm 24b extending in the outer diameter direction from the shaft hole portion 24a. The detachment pressing portion 24c is provided on the arm portion 20c of the insertion / removal frame 20. It is possible to contact the pressed part 20e. The aforementioned urging force of the insertion / removal frame urging spring 46 urges the insertion / removal frame 20 from the disengagement position to the insertion position direction (counterclockwise in FIGS. 6 to 12). It is urged to rotate in the same direction (counterclockwise in FIGS. 6 to 12) by the detachment drive lever urging spring 54. In the rectilinear moving ring 14, a stopper is provided for determining the turning end of the detachment drive lever 24 in the urging direction by the detachment drive lever urging spring 54. On the other hand, the rotation of the insertion / removal frame 20 in the urging direction by the insertion / removal frame urging spring 46 is regulated by the contact between the stopper contact portion 20d and the stopper 18g. FIG. 6 shows a state where the insertion / removal frame 20 and the separation drive lever 24 are in contact with the respective stoppers. At this time, the pressed portion 20e and the separation pressing portion 24c are separated from each other (see FIGS. 4 and 5). . The clearance between the pressed portion 20e and the separation pressing portion 24c is within the movable range of the vibration isolation frame 18 relative to the shutter unit 16 (the range until the movement restricting projection 16d contacts the inner surface of the movement restricting hole 18c). The size is set such that the pressing portion 20e is not brought into contact with the separation pressing portion 24c. In other words, the detachment drive lever 24 does not prevent the anti-vibration drive of the anti-vibration frame 18 and the insertion / removal frame 20 by the anti-vibration drive actuator 26. If no external force is applied to the insertion / removal frame 20 and the separation drive lever 24, the insertion / removal frame 20 is maintained at the insertion position by the biasing force of the insertion / removal frame biasing spring 46 as shown in FIGS. .

  The separation drive lever 24 includes a pressed portion 24d in the vicinity of the shaft hole portion 24a. In the lens barrel, a detachment pressing protrusion (detachment drive mechanism) 58 (FIGS. 3 and 9) is fixed behind the detachment drive lever 24, so that the rectilinear moving ring 14 in the retracted state is placed. In accordance with the backward movement, the detachment pressing protrusion 58 contacts the pressed portion 24d, and the detachment drive lever 24 is rotated from the insertion position toward the detachment position. More specifically, an end face cam 58a is formed at the tip of the separation pressing protrusion 58, and when the linear movement ring 14 moves backward and approaches the separation pressing protrusion 58, the pressed part 24d comes into contact with the end cam 58a. By this contact, the detachment drive lever 24 is rotated in the direction against the urging force of the detachment drive lever urging spring 54 (the direction of the detachment position of the insertion / removal frame 20) from the moving force of the rectilinear movement ring 14 rearward in the optical axis direction. A component force to be moved is generated, and after the separation driving lever 24 is rotated by the amount of the clearance described above, the separation pressing portion 24 c comes into contact with the pressed portion 20 e of the insertion / removal frame 20. Then, the pressing force in the direction of the detachment position is transmitted to the insertion / removal frame 20 via the detachment pressing portion 24c and the pressed portion 20e, and resists the urging forces of both the insertion urging spring 46 and the detachment drive lever urging spring 54. Then, the detachment drive lever 24 presses and rotates the insertion / removal frame 20 in the detachment direction. After the insertion / removal frame 20 reaches the separation position, a separation holding surface 58b substantially parallel to the photographing optical axis O provided on the side surface of the separation pressing protrusion 58 engages with the side surface of the pressed portion 24d, and the insertion / removal frame 20 is It is held at the disengaged position (FIG. 9).

  With reference to FIGS. 15 and 16, the operation of the image stabilizing lens block 10 during the period from when the lens barrel shifts from the housed state to the photographing state and back to the housed state will be described. The flowchart of FIG. 16 shows the drive control of the zoom motor 62 and the coil 31 and coil 32 (anti-vibration drive actuator 26) by the control circuit 60 in the meantime.

  In the retracted state of the lens barrel, as shown in FIG. 9, the detachment holding surface 58 b of the detachment pressing protrusion 58 is in a positional relationship where it abuts against the pressed portion 24 d, so The projection 58 is held at the separation position and the rotation to the insertion position is restricted, and the vibration-proof insertion / removal lens 12 is detached from the optical path (imaging optical axis O).

  When the main switch 61 is turned on with the lens barrel retracted, a shooting instruction signal is sent from the main switch 61 to the control circuit 60. The control circuit 60 that has received the shooting instruction signal from the main switch 61 sends a shooting drive instruction signal (forward rotation instruction signal) to the zoom motor 62 to drive the zoom motor 62 to rotate (forward rotation) (S1). The zoom motor 62 is rotationally driven until the lens barrel is in the photographing state (S2: NO, S1), and is stopped when the lens barrel is in the photographing state (S2: YES, S3).

  The anti-vibration lens block 10 (the linear movement ring 14 and the shutter unit 16) is moved forward in the optical axis direction by the rotation driving of the zoom motor 62 from the housed state to the photographing state, and the separation driving lever 24 by the separation pressing projection 58 is moved. The pressing is released, and the detachment drive lever 24 returns to the position shown in FIG. 6 by the urging force of the detachment drive lever urging spring 54. Then, the insertion / removal frame 20 is rotated from the removal position to the insertion position by the biasing force of the insertion / removal frame biasing spring 46. Along with this, the holding of the vibration isolating frame 18 at the separation assist position is also released.

  When the lens barrel is in the photographing state, the control circuit 60 sends the energization instruction signal to the coil 31 and the coil 32 to energize the coil 31 and the coil 32, thereby bringing the anti-vibration drive actuator 26 into the driving state and the position. The detection sensors 38 and 40 are turned on (S4). In the present embodiment, when the lens barrel is in the shooting state, the image stabilization frame actuator 18 is always in the drive state and the position detection sensors 38 and 40 are turned on so that the image stabilization frame 18 can be used for image blur correction. Anti-vibration drive.

  In the photographing state of the lens barrel, as shown in FIGS. 6 to 8, the insertion / removal frame 20 is held at the insertion position by the biasing force of the insertion / removal frame biasing spring 46, and Is coincident with the photographing optical axis O. In the photographing state, the vibration-proof insertion / removal lens 12 is moved to the photographing optical axis by driving the vibration-proof frame 18 in the plane orthogonal to the optical axis by the vibration-proof drive actuator 26 according to the direction and magnitude of the vibration applied to the lens barrel. It is possible to suppress the shift (image blurring) of the subject image on the imaging plane by shifting with respect to O. More specifically, the moving angular velocity of the lens barrel is detected by a gyro sensor built in the lens barrel, and the moving angle is obtained by integrating the angular velocity of the shake over time, and the image is moved on the imaging surface from the moving angle. In addition to calculating the amount, the driving amount and the driving direction of the anti-vibration insertion / removal lens 12 (anti-vibration frame 18) for canceling the image blur are calculated. Then, energization control of the coil 31 and the coil 32 is performed based on the calculated value. Then, the anti-vibration frame 18 is moved while the three ball contact surfaces 18a receive the support guidance with respect to the three guide balls 28. When the anti-vibration frame 18 is subjected to anti-vibration driving, the insertion / removal frame 20 is held at an insertion position where the stopper contact portion 20d is brought into contact with the stopper 18g, and the anti-vibration frame 18 and the insertion / removal frame 20 (anti-vibration) The insertion / removal lens 12) is moved together.

  In the photographing state, the position detection sensors 38 and 40 can be calibrated using the moving end position of the vibration isolating frame 18 by the contact between the movement restricting protrusion 16d and the inner surface of the movement restricting hole 18c. The direction of action F1 and F2 of the driving force of each pair of the coils 31 and 32 and the permanent magnets 34 and 36 constituting the anti-vibration driving actuator 26 intersect with the X axis and the Y axis at a relationship of about 45 degrees, and movement limitation The moving end where the X-axis direction both ends of the movement restricting hole 18c abut against the protrusion 16d is set as the X-axis drive reference position of the anti-vibration drive actuator 26, and the Y of the movement restricting hole 18c with respect to the movement restricting protrusion 16d A moving end where both end portions in the axial direction come into contact with each other can be set as a drive reference position for the Y axis. The practical vibration-proof drive range of the vibration-proof frame 18 in the photographing state is set in a range in which the movement restriction protrusion 16d does not contact the inner surface of the movement restriction hole 18c.

  When a release switch (not shown) is pressed halfway in the shooting state of the lens barrel with the main switch 61 turned on, autofocus and automatic exposure are performed, and when the release switch is fully pressed (S5: NO, S6). : YES), subject imaging processing is performed by an imaging element (not shown) (S7).

  In this embodiment, when the main switch 61 is turned off in the shooting state of the lens barrel (S5: YES), a storage instruction signal is sent from the main switch 61 to the control circuit 60. Upon receiving the storage instruction signal from the main switch 61, the control circuit 60 first sends an energization release instruction signal to the coils 31 and 32, and then sends a storage drive instruction signal (reverse rotation instruction signal) to the zoom motor 62. send. The time from when the energization release instruction signal is sent until the coil 31 and the coil 32 are deenergized is longer than the time from when the storage drive instruction signal is sent until the zoom motor 62 starts to rotate (reverse). Since the current is short, the coil 31 and the coil 32 are first de-energized and the anti-vibration drive actuator 26 is switched to the non-driven state (S8), and then the rotation drive of the zoom motor 62 is started (S9). Further, the control circuit 60 switches the position detection sensors 38 and 40 to the off state before the zoom motor 62 is started to rotate (S8). The zoom motor 62 is rotationally driven until the lens barrel is retracted (S10: NO, S9), and is stopped when the lens barrel is retracted (S10: YES, S11).

  The anti-vibration lens block 10 (the linear movement ring 14 and the shutter unit 16) is moved rearward in the optical axis direction by the rotational drive of the zoom motor 62 from the photographing state to the housed state, and then retreats together with the linear movement ring 14. The pressed portion 24 d of the separation drive lever 24 abuts against the end face cam 58 a of the separation pressing protrusion 58. Then, the pressed portion 24d is pressed by the end face cam 58a, and a component force is generated from the backward movement force of the rectilinear moving ring 14, and the separation drive lever 24 rotates against the urging force of the detachment drive lever urging spring 54. Then, the separation pressing portion 24c comes into contact with the pressed portion 20e. As described above, an urging force toward the insertion position is applied to the insertion / removal frame 20 by the insertion / removal frame urging spring 46, and the detachment drive lever 24 with which the detachment pressing portion 24c abuts the pressed portion 20e is provided. Then, the insertion / removal frame urging spring 46 is pressed against the urging force of the insertion / removal frame urging spring 46 from the insertion position toward the separation position. In addition, an urging force in a direction of pressing the ball contact surface 18 a against the guide ball 28 by the three tension springs 30 acts on the vibration isolation frame 18 that supports the insertion / removal frame 20. That is, movement resistance due to the urging force of the insertion / removal frame urging spring 46 and the tension spring 30 acts on the insertion / removal frame 20 and the vibration isolation frame 18, respectively. Here, the rotational resistance of the insertion / removal frame 20 provided by the insertion / removal frame biasing spring 46 is set larger than the movement resistance of the vibration isolation frame 18 provided by the tension spring 30. Therefore, the pressing force acting on the insertion / removal frame 20 is transmitted to the vibration isolation frame 18, and the vibration isolation frame 18 together with the insertion / removal frame 20 before the rotation of the insertion / removal frame 20 in the direction of the separation position is started. It is moved toward the separation position. Then, the anti-vibration frame 18 is moved to the separation assist position (FIGS. 9 to 11) where the Y-axis direction end portion (end portion on the insertion position side) of the movement restriction hole 18c contacts the movement restriction protrusion 16d. . As described above, the practical anti-vibration driving range of the anti-vibration frame 18 in the shooting state does not include a place where the inner surface of the movement restriction hole 18c contacts the movement restriction protrusion 16d. It is located outside the vibration drive range. When the vibration isolating frame 18 reaches the separation assist position and further movement is restricted, the insertion / removal frame 20 is independently rotated from the insertion position to the separation position. That is, the separation movement of the anti-vibration insertion / removal lens 12 is performed as a combined movement of the movement of the anti-vibration frame 18 to the separation auxiliary position in the Y-axis direction and the rotation of the insertion / removal frame 20 to the separation position.

  By the movement of the anti-vibration frame 18 to the separation assisting position and the rotation of the insertion / removal frame 20 to the separation position, the anti-vibration insertion / removal lens 12 moves from the optical path (photographing optical axis O) as shown in FIGS. Will be withdrawn. When the rectilinear moving ring 14 continues to move backward, the separation holding surface 58b of the separation pressing protrusion 58 comes into contact with the pressed portion 24d (FIG. 9), and the insertion / removal frame 20 and the separation drive lever 24 are brought together. The release pressing projection 58 holds the release position and restricts the rotation to the insertion position. In the retracted state of the lens barrel, the movement resistance (rotation resistance) in the direction of the separation position applied to the insertion / removal frame 20 by the insertion / removal frame biasing spring 46 is applied to the vibration-proof movable frame 18 by the tension spring 30. Therefore, the anti-vibration movable frame 18 is positioned at a specific position in the plane orthogonal to the optical axis (the movement restriction hole 18c is in contact with the movement restriction projection 16d at one end in the Y-axis direction). At the removal assisting position), it is held (locked) without rattling by the pressing force from the insertion / removal frame 20 (detachment drive lever 24). Although not shown, when the lens barrel reaches the retracted state, a rear member (for example, in the shooting state, is prevented in the space in the straight moving ring 14 vacated by detachment of the vibration-proof insertion / removal lens 12 (lens holding cylinder portion 20a). Another optical element positioned behind the transfer / removal lens 12 enters. Thereby, the optical axis direction size at the time of accommodation can be made smaller than a lens barrel of a type in which a plurality of optical elements are accommodated in series on the optical axis.

  As described above, in the position control device for the vibration-proof insertion / removal optical element 12 according to the present embodiment, when the control means 60 receives the storage instruction signal from the input means 61, the main actuator 62 advances and retracts the frame (14, 16). Before moving the insertion / removal frame 20 (anti-vibration insertion / removal optical element 12) from the insertion position to the separation position via the separation drive mechanism 24. The anti-vibration drive actuator 26 is switched from the driving state to the non-driving state by turning off the power to 32). According to this configuration, when the anti-vibration movable frame 18 including the detachment movement of the anti-vibration insertion / removal optical element 12 is housed and moved, a current flows through the anti-vibration coils (31, 32), whereby the anti-vibration driving actuator 26 is obtained. Can be prevented from being broken or consuming wasteful power.

  In Patent Document 3 described above, a stopper member that fixes the vibration-proof movable frame in the centered state and a cam bar that moves the vibration-proof lens away from the optical axis are required as separate members. There is a problem that the mechanism and control for storing and moving the movable frame and separating the vibration-proof lens are complicated. On the other hand, according to the position control device of the vibration isolating insertion / removal optical element 12 according to the present embodiment, the detachment drive lever (for moving the insertion / removal frame 20 (anti-vibration insertion / removal optical element 12) from the insertion position to the separation position). The anti-vibration movable frame 18 is held at a specific position in the plane orthogonal to the optical axis by using the separation driving mechanism 24 (a separation assist position where one end of the movement restriction hole 18c in the Y-axis direction is in contact with the movement restriction protrusion 16d). (The detachment drive lever 24 also functions as the stopper member and the cam bar of Patent Document 3), such a problem does not occur.

  As described above, the description is based on the illustrated embodiment, but the anti-vibration block (the anti-vibration driving mechanism and the separation driving mechanism) to which the present invention can be applied is not limited thereto. 17 to 19 show an anti-vibration block 11 according to another embodiment of the present invention, and the present invention can also be applied to the anti-vibration block 11.

  The anti-vibration block 11 shown in FIGS. 17 to 19 includes a rectilinear moving ring (advancing / retracting member) 70 that is moved in the optical axis direction by the rotational drive of the zoom motor 62 (FIG. 15). An anti-vibration insertion / removal lens (anti-vibration insertion / removal optical element) 12 is supported inside the linear movement ring 70 via an anti-vibration unit (anti-vibration movable frame) 80. The anti-vibration unit 80 supports the anti-vibration insertion / removal lens 12 so as to be movable along a plane substantially orthogonal to the photographing optical axis O. A shutter unit (advancing / retracting member) 90 having a built-in shutter is also fixed to the front portion of the vibration isolating unit 80 in the rectilinear moving ring 70.

  As shown in FIGS. 18 and 19, the image stabilization unit 80 includes a first stage 81 and a second stage 82. The first stage 81 is slidably supported with respect to the X guide shaft 83 fixed in the rectilinear moving ring 70, and the second stage 82 is fixed on the first stage 81 with a Y guide shaft 84 and a Y guide. The shaft 85 is slidably supported. The X guide shaft 83 is oriented in the left-right direction within a plane orthogonal to the photographing optical axis O. Hereinafter, the movement direction of the first stage 81, which is the extending direction of the X guide shaft 83, is defined as the X direction or the X axis. Call it. The Y guide shafts 84 and 85 are oriented in the vertical direction perpendicular to the X guide shaft 83 in a plane perpendicular to the photographing optical axis O. In the following, the Y guide shafts 84 and 85 are the extending direction of the Y guide shafts 84 and 85. The moving direction of the two stages 82 is called the Y direction or the Y axis.

  The first stage 81 includes an upper side part 81a and a lower side part 81b that are separated in the Y direction and extended in the X direction, and a side part 81c and a side part 81d that are separated in the X direction and extended in the Y direction. And has a square frame shape with a central portion surrounded by each side as an opening 81e. Two X guide holes 81g are formed on the upper side portion 81a at different positions in the X direction, and an X guide shaft 83 is slidably inserted into each X guide hole 81g. The Y guide shaft 84 is fixed at a position along the side portion 81c in the opening 81e, and the Y guide shaft 85 is fixed at a position along the side portion 81d in the opening 81e. The lower end portion protrudes below the lower side portion 81b and is inserted into a pair of elongated holes 70c (FIG. 17) formed in the rectilinear movement ring 70. The long hole 70c is a long hole whose longitudinal direction is directed in the X direction, and guides the movement of the Y guide shafts 84 and 85 in the X direction. On the other hand, the movement of the Y guide shafts 84 and 85 in the optical axis direction is restricted by the front and back wall surfaces of the long hole 70c. With the above structure, the first stage 81 is supported so as to be movable in the X direction with respect to the rectilinear moving ring 70.

  The second stage 82 includes a lens holding cylinder portion 82a to which an insertion / removal frame 86 for holding the vibration-proof insertion / removal lens 12 is fixed, and extends in a “V” shape obliquely upward from the lens holding cylinder portion 82a. And a pair of support arm portions 82b and 82c having a substantially symmetrical shape with respect to the axis. Y guide shafts 84 and 85 are slidably inserted into Y guide holes 82d and 82e formed through the support arm portions 82b and 82c in the Y direction, respectively. Thus, the second stage 82 is supported so as to be movable in the Y direction with respect to the first stage 81. By the movement in the Y direction, the position occupied by the second stage 82 in the opening 81e of the first stage 81 changes.

  The first stage 81 and the second stage 82 include two permanent magnets (vibration-proof magnets) 34 and 36 (FIGS. 18 and 19) fixed on the support arm portions 82b and 82c of the second stage 82, and a shutter unit. Drive control is performed by an anti-vibration drive actuator 26 having two coils (anti-vibration coils) 31 and 32 (FIG. 17) fixed to 90.

  On the rear surface of the shutter unit 90, a position detection sensor 38 is provided corresponding to the coil 31, and a position detection sensor 40 is provided corresponding to the coil 32. The position detection sensors 38 and 40 can detect the positions in the X direction and the Y direction of the vibration-proof insertion / removal lens 12 that moves together with the permanent magnets 34 and 36.

  The coils 31 and 32 and the position detection sensors 38 and 40 are provided as modules on the shutter FPC 91 fixed to the rear surface of the shutter unit 90. The shutter FPC 91 is connected to the control circuit 60 (FIG. 15), and energization control for the coils 31 and 32 is performed by the control circuit 60. Further, the position information detected by the position detection sensor 38 and the position sensor 40 is input to the control circuit 60 as a position detection signal.

  In the photographing state of the lens barrel, the upper end portions of the support arm portions 82b and 82c of the second stage 82 are positioned close to the upper side portion 81a of the first stage 81, and the optical axis of the image stabilization insertion / removal lens 12 is It is in the image stabilization drive position that coincides with the photographing optical axis O of the photographing optical system. On the other hand, in the retracted state of the lens barrel, the lower end portions of the support arm portions 82b and 82c of the second stage 82 are in contact with the lower side portion 81b of the first stage 81 so that the downward movement is restricted. The optical axis of the lens-removal lens 12 is at a separation position where it is separated from the photographing optical axis O of the photographing optical system.

  The range in which the position of the image stabilization insertion / removal lens 12 can be controlled by the image stabilization drive actuator 26 is limited to the image stabilization drive position. The stage 82) is driven in the Y direction by a detachment drive lever (detachment drive mechanism) 102 and a detachment pressing protrusion (detachment drive mechanism) 106 provided separately from the image stabilization drive actuator 26. The separation drive lever 102 is pivotally supported in the linear movement ring 70 by the support shaft 101. As shown in FIG. 17, the support shaft 101 is inserted into a shaft hole 102 a formed in the separation drive lever 102, a front end portion thereof is supported by a shaft support hole 70 e formed in the rectilinear movement ring 70, and a rear end portion thereof. It is supported by a lever pressing member 103 fixed to the rectilinear moving ring 70. In this support state, the axis of the support shaft 101 is substantially parallel to the photographing optical axis O, and the detachment drive lever 102 can swing around the support shaft 101. The separation pressing protrusion 106 is provided behind the image stabilizing unit 80 so as to protrude forward in the optical axis direction.

  In the separation drive lever 102, an insertion / removal guide groove 107 and a separation prevention groove 104 are continuously formed in a "<" shape. The insertion / removal guide groove 107 is a groove extending in the rotational radius direction centering on the shaft hole 102a. The separation preventing groove 104 communicates with the outer diameter side end of the insertion / removal guide groove 107. The groove width of the separation preventing groove 104 is wider than the groove width of the insertion / removal guide groove 107.

  The second stage 82 is provided with a position control pin 82h that protrudes rearward from the support arm portion 82b. The position control pin 82h is arranged in the insertion / removal guide groove 107 according to the swinging position of the separation drive lever 102. It is located in any one of the separation preventing grooves 104.

  When the second stage 82 is in the disengagement position, the disengagement drive lever 102 is held at an angle (disengagement retention position) in which the lever extending direction centering on the shaft hole 102a is inclined downward, and the position control pin 82h is inserted and removed. The groove 107 is engaged. At this time, the position control of the second stage 82 in the Y direction is performed by the contact of the insertion / removal guide groove 107 with the position control pin 82h. Here, when the separation drive lever 102 is rotated clockwise as viewed from the rear in the optical axis direction, the insertion / removal guide groove portion 107 presses the position control pin 82h upward, and the second stage 82 is moved from the separation position to the anti-vibration position. Moved towards.

  When the second stage 82 is in the vibration proof position, the detachment drive lever 102 is held at an angle (insertion position) in which the lever extending direction around the shaft hole 102a is obliquely upward, and the position control pin 82h is provided with the detachment prevention groove portion. Located in 104. At this time, the extending direction (longitudinal direction) of the separation preventing groove portion 104 is substantially parallel to the X direction, and the position control pin 82h is not restricted in the X direction. The movement of the first stage 81 and the second stage 82 is not hindered. Further, the separation preventing groove 104 is set wider than the insertion / removal guiding groove 107, and the second stage 82 in the Y direction by the anti-vibration driving actuator 26 is interposed between the separation preventing groove 104 and the position control pin 82h. Sufficient clearance that does not hinder movement is secured.

  When the separation drive lever 102 is rotated from the insertion position toward the separation holding position while the second stage 82 is in the anti-vibration driving position, the insertion / removal guide groove 107 presses the position control pin 82h downward, and the second The stage 82 is moved from the image stabilization drive position to the separation position.

  The separation drive lever 102 is rotationally biased to the insertion position by a lever biasing spring 105, and a stopper 70f with which the separation drive lever 102 abuts by this biasing force is provided on the inner surface of the rectilinear movement ring 70. . Therefore, the separation drive lever 102 is held at the insertion position when no special external force is applied, and the second stage 82 is held at the vibration-proof drive position accordingly. As described above, the separation pressing protrusion 106 is provided behind the image stabilizing unit 80 so as to protrude forward in the optical axis direction. When the linear movement ring 70 moves rearward in the optical axis direction, the separation pressing protrusion 106 is The detachment drive lever 102 is pressed, and the detachment drive lever 102 is rotated from the insertion position to the detachment holding position against the urging force of the lever urging spring 105. Specifically, an end face cam 106 a is formed at the distal end portion of the separation pressing protrusion 106, and when the linear movement ring 70 moves backward and approaches the separation pressing protrusion 106, a cam contact portion 102 b provided on the separation driving lever 102. Comes into contact with the end face cam 106a. Due to this contact, a component force for rotating the separation drive lever 102 to the separation holding position is generated from the moving force of the rectilinear moving ring 70 rearward in the optical axis direction. When the detachment drive lever 102 reaches the detachment holding position, the detachment holding surface 106b substantially parallel to the photographing optical axis O provided on the side surface of the detachment pressing protrusion 106 engages with the detachment holding surface 102c, and the detachment driving lever 102 is detachably held. Continue to hold in position.

  Also in the anti-vibration lens block 11 configured as described above, when the input unit 61 inputs the storage instruction signal, the control unit 60 causes the main actuator 62 to move the advance / retreat frame (70, 90) from the shooting position to the storage position. Before moving the insertion / removal frame 86 (anti-vibration insertion / removal optical element 12) from the insertion position to the separation position via the separation drive lever 102, the energization to the vibration isolation coils (31, 32) is cut off. The vibration-proof drive actuator 26 is switched from the drive state to the non-drive state. Accordingly, when the anti-vibration movable frame 80 is moved and moved including the separation movement of the anti-vibration optical element 12, the anti-vibration driving actuator 26 is broken or wasted by current flowing through the anti-vibration coils (31, 32). Can be prevented.

  In the above embodiment, when the input means 61 receives the storing instruction signal, the control means 60 cuts off the power supply to the vibration isolation coils (31, 32) and changes the vibration isolation drive actuator 26 from the drive state to the non-drive state. After switching, the main actuator 62 moves the advance / retreat frame (14 and 16 or 70 and 90) from the shooting position toward the storage position. However, when the input means 61 receives the storage instruction signal, the control means 60 starts moving the advance / retreat frame (14 and 16 or 70 and 90) from the shooting position toward the storage position by the main actuator 62 and then detaches. Before starting to move the insertion / removal frame (20 or 86) from the insertion position to the separation position via the drive mechanism (24 or 102), the vibration-proof coil (31, 32) is de-energized and the vibration-proof drive actuator 26 is turned off. May be switched from the drive state to the non-drive state.

  In the above embodiment, when the advance / retreat frames 14 and 16 (or 70 and 90) are moved from the photographing position to the storage position by the main actuator 62, the separation pressing protrusion 58 (or 106) moves the separation drive lever 24 (or 102). The detachment drive lever 24 (or 102) presses the insertion / removal frame 20 (or 86) to move the insertion / removal frame 20 (or 86) from the insertion position to the separation position.

  However, the application target of the present invention is not limited to this, and can be applied to a position control device for an anti-vibration insertion / removal optical element as described in Patent Document 3, for example. That is, the cam bar (corresponding to the detachment pressing protrusion 58 or 106 of this embodiment) directly presses against the insertion / removal frame (corresponding to the insertion / removal frame 20 or 86 of this embodiment), so that the insertion / removal frame is inserted into the insertion position. It is also possible to move from the position to the separation position.

10 11 Anti-vibration lens block 12 Anti-vibration insertion / removal lens (anti-vibration insertion / removal optical element)
14 Straight moving ring (advance / retreat frame)
16 Shutter unit (advance / retreat frame)
16d Movement restriction protrusion (movement restriction means)
16e Ball support hole 18 Anti-vibration frame (vibration-proof movable frame)
18a Ball contact surface 18c Movement restriction hole (movement restriction means)
18 g Stopper 20 Insertion / removal frame 20 d Stopper contact portion 20 e Pressed portion 22 Sensor holder 24 Detachment drive lever (detachment drive mechanism)
24c Detachment pressing portion 24d Pressed portion 26 Anti-vibration drive actuator 28 Guide ball (anti-vibration guide member)
30 Tension spring (vibration-proof movable frame biasing member)
31 32 coil (anti-vibration coil)
34 36 Permanent magnet (vibration-proof magnet)
38 40 position detection sensor 44 retaining member 46 insertion / removal frame biasing spring (insertion / removal frame biasing member)
54 Detachment drive lever biasing spring 58 Detachment pressing protrusion (detachment drive mechanism)
58a End face cam 58b Detachment holding surface 60 Control circuit (control means)
61 Main switch (input means)
62 Zoom motor (main actuator)
70 Straight moving ring (advancing / retracting member)
70c long hole 70e shaft support hole 70f stopper 80 anti-vibration unit (vibration-proof movable frame)
81 First stage 81a Upper side part 81b Lower side part 81c Side part 81d Side part 81e Opening 81g X guide hole 82 Second stage 82a Lens holding cylinder part 82b 82c Support arm part 82d 82e Y guide hole 82h Position control pin 83 X guide Shaft 84 85 Y guide shaft 86 Insertion / removal frame 90 Shutter unit (advance / retreat member)
91 Shutter FPC
101 Support shaft 102 Detachment drive lever (detachment drive mechanism)
102a Shaft hole 102b Cam contact portion 102c Detachment holding surface 103 Lever pressing member 104 Detachment prevention groove 105 Lever biasing spring 106 Detachment pressing protrusion (detachment drive mechanism)
106a End face cam 106b Detachment holding surface 107 Insertion / removal guide groove O Imaging optical axis

Claims (7)

Imaging optical system having an anti-vibration insertion / removal optical element;
An advancing / retreating frame that moves between a photographing position in the optical axis direction of the photographing optical system and a storage position;
A main actuator for driving the advance / retreat frame between the photographing position and the storage position ;
An anti-vibration movable frame supported by the advance / retreat frame so as to be movable in a direction perpendicular to the optical axis of the imaging optical system;
An anti-vibration coil and an anti-vibration magnet provided on one and the other of the advance / retreat frame and the anti-vibration movable frame, and the anti-vibration movable frame with respect to the advance / retreat frame by an energization control of the anti-vibration coil. Anti-vibration drive actuator that controls the drive within
An insertion / removal frame that holds the above-described anti-vibration insertion / removal optical element;
The insertion / removal frame includes an insertion position for positioning the anti-vibration insertion / removal optical element on the optical axis of the photographing optical system at the photographing position, and an anti-vibration insertion from the optical axis of the photographing optical system at the storage position. Being supported by the anti-vibration movable frame so as to be movable between a detaching position for detaching the detachable element;
A detachment drive mechanism that engages with the insertion / removal frame and moves the insertion / removal frame from the insertion position to the separation position when the advance / retreat frame is moved from the photographing position to the storage position by the main actuator;
The detachment drive mechanism moves the anti-vibration movable frame following the direction of the detachment position of the insertion / removal frame when moving the insertion / removal frame from the insertion position to the separation position via the separation drive mechanism, and And holding the anti-vibration movable frame at a specific position in the plane orthogonal to the optical axis in a state where the insertion / removal frame is held at the separation position by the separation drive mechanism;
Input means for inputting a storage instruction signal from the photographing position to the storage position of the advance / retreat frame by the main actuator in a driving state of the vibration isolation drive actuator energized to the vibration isolation coil; and When the signal is input, the main actuator moves the advance / retract frame from the shooting position toward the storage position and moves the insertion / removal frame from the insertion position to the separation position via the separation drive mechanism. Control means for switching off the anti-vibration drive actuator from the drive state to the non-drive state by cutting off the energization to the anti-vibration coil;
A position control device for an anti-vibration insertion / removal optical element, comprising: Imaging optical system having an anti-vibration insertion / removal optical element;
An advancing / retreating frame that moves between a photographing position in the optical axis direction of the photographing optical system and a storage position;
A main actuator for driving the advance / retreat frame between the photographing position and the storage position ;
An anti-vibration movable frame supported by the advance / retreat frame so as to be movable in a direction perpendicular to the optical axis of the imaging optical system;
An anti-vibration coil and an anti-vibration magnet provided on one and the other of the advance / retreat frame and the anti-vibration movable frame, and the anti-vibration movable frame with respect to the advance / retreat frame by an energization control of the anti-vibration coil. Anti-vibration drive actuator that controls the drive within
An insertion / removal frame that holds the above-described anti-vibration insertion / removal optical element;
The insertion / removal frame includes an insertion position for positioning the anti-vibration insertion / removal optical element on the optical axis of the photographing optical system at the photographing position, and an anti-vibration insertion from the optical axis of the photographing optical system at the storage position. Being supported by the anti-vibration movable frame so as to be movable between a detaching position for detaching the detachable element;
An anti-vibration guide provided between the advancing / retracting frame and the anti-vibration movable frame and allowing the anti-vibration movable frame to move within the plane orthogonal to the optical axis while being sandwiched between the advance / retreat frame and the anti-vibration movable frame. Element;
An anti-vibration movable frame urging member that urges the advance / retreat frame and the anti-vibration movable frame in the optical axis direction to maintain the clamping state of the anti-vibration guide member;
An insertion / removal frame biasing member that biases the insertion / removal frame to move toward the insertion position;
Movement restriction means for restricting a movement range of the vibration-proof movable frame at least in the direction of the separation position;
The movement resistance in the direction of the separation position applied to the insertion / removal frame by the insertion / removal frame urging member is the vibration isolation guide member applied to the vibration isolation movable frame by the vibration isolation movable frame biasing member. Greater than the resistance to movement between;
A detachment drive mechanism that engages with the insertion / removal frame and moves the insertion / removal frame from the insertion position to the separation position when the advance / retreat frame is moved from the photographing position to the storage position by the main actuator;
The detachment drive mechanism moves the anti-vibration movable frame together with the insertion / removal frame in the direction of the detachment position until the movement restriction by the movement restriction unit, and then moves the anti-vibration movable frame to the optical axis by the movement restriction unit. Moving the insertion / removal frame alone to the separation position while being held at a specific position in an orthogonal plane;
Input means for inputting a storage instruction signal from the photographing position to the storage position of the advance / retreat frame by the main actuator in a driving state of the vibration isolation drive actuator energized to the vibration isolation coil; and When the signal is input, the main actuator moves the advance / retract frame from the shooting position toward the storage position and moves the insertion / removal frame from the insertion position to the separation position via the separation drive mechanism. Control means for switching off the anti-vibration drive actuator from the drive state to the non-drive state by cutting off the energization to the anti-vibration coil;
A position control device for an anti-vibration insertion / removal optical element, comprising: In the position control device of the vibration-proof insertion / removal optical element according to claim 2 ,
The anti-vibration guide member is a position control device for an anti-vibration insertion / removal optical element comprising a guide ball. In the position control apparatus of the vibration isolating insertion / removal optical element according to any one of claims 1 to 3 ,
When the input means inputs the storing instruction signal, the control means cuts off the power supply to the vibration isolation coil and switches the vibration isolation drive actuator from the drive state to the non-drive state. A position control device for an anti-vibration insertion / removal optical element that moves an advance / retreat frame from the shooting position toward the storage position. In the position control apparatus of the vibration isolating insertion / removal optical element according to any one of claims 1 to 4 ,
When the input means receives the storage instruction signal, the control means sends an anti-vibration coil energization release instruction signal to the anti-vibration drive actuator, and then sends the storage drive instruction signal to the main actuator. Position control device for insertion / removal optical element. In the position control device of the vibration-proof insertion / removal optical element according to any one of claims 1 to 5 ,
The main actuator is a position control device for an anti-vibration insertion / removal optical element comprising a zoom motor. In the position control apparatus of the vibration isolating insertion / removal optical element according to any one of claims 1 to 6 ,
The detachment drive mechanism includes a detachment drive lever that rotates about a rotation axis parallel to the optical axis of the photographing optical system, and a detachment pressing protrusion that is fixed to the position control device. When the advancing / retracting frame moves from the shooting position to the storage position, the detachment pressing protrusion presses the detachment driving lever, and the detachment driving lever presses the insertion / removal frame, thereby moving the insertion / removal frame to the insertion position. Position control device for anti-vibration insertion / removal optical element that is moved from the position to the separation position.

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