JP2014190983A - Image oscillation correction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image oscillation correction device that enables a limitation of a rotation in an in-plane orthogonal to an optical axis of a movable member without enlarging a size.SOLUTION: An image oscillation correction device has: a movable frame that holds an oscillation proof optical element; a stationary frame that movably supports the movable frame on a plane surface orthogonal to an optical axis via a support member; first drive means that drives the movable frame in a first direction orthogonal to the optical axis; second drive means that drives the movable frame in a second direction orthogonal to the optical axis; a first alignment mechanism for regulating a drive in the first direction; a second alignment mechanism for regulating a drive in the second direction, in which the first and second alignment mechanisms limit a rotation of the movable frame; and a rotation limitation mechanism that limits a rotation of the movable frame on an opposite side across the optical axis with respect to a linear line connecting the first and second alignment mechanisms.

Description

  The present invention relates to an image blur correction apparatus used for a lens barrel or the like.

  Conventionally, in order to prevent image blur due to camera shake that tends to occur during hand-held shooting, the camera shake status is detected by the shake detection means, and the correction lens is shifted in a direction perpendicular to the optical axis according to the detection result. There is known an image blur correction apparatus having such a configuration.

  In an interchangeable lens or camera equipped with an image blur correction device, a correction lens that forms part of a photographing lens system is movably supported. By moving the correction lens in a direction that absorbs shake in a plane orthogonal to the optical axis, the deviation of the imaging position due to shake is corrected, and image shake is eliminated.

  As one of the problems of such an image blur correction device, there is an unfavorable influence due to rotation in a plane orthogonal to the optical axis of a movable frame that movably supports a correction lens for preventing image blur. Can be mentioned. When an impact is applied from the outside, the fixed frame that movably supports the movable frame that holds the correction lens moves. The fixed frame moves, but the movable frame does not move due to inertia. Therefore, the fixed frame and the movable frame move relatively, and the stopper is engaged. A force is applied to the movable frame from the stopper section, and the movable frame moves. At this time, when the force from the node does not pass through the center of gravity, or when the balance with the driving force is not achieved, a rotational moment is generated that rotates the movable frame in the plane orthogonal to the optical axis.

  For this reason, if there is no means to limit the rotation of the movable member in the plane perpendicular to the optical axis, the movable frame can rotate freely during image blur correction or when an external impact is applied, causing interference with other parts. May cause damage or change in driving characteristics.

  Patent Document 1 describes an image blur correction device in which a fixed member that supports a movable member via a ball is provided with a limiting unit that limits the rotation of the movable frame.

JP 2009-222899 A

  The image shake correction apparatus described in Patent Document 1 includes a restriction unit that restricts the rotation of the movable frame on the fixed member that supports the movable member via the ball. However, the rotation restriction is separate from the mechanical drive restriction unit. Since the portion is provided at a plurality of locations, the apparatus becomes large. In addition, the rotation restricting portion needs to avoid interference within the driving range of the movable member determined by the drive restricting portion, and it is necessary to secure an escape amount. For this reason, the rotation angle that can be restricted becomes large, which causes an increase in the size of the apparatus.

  An object of the present invention is to provide an image blur correction device capable of limiting rotation in a plane perpendicular to the optical axis of a movable member without increasing the size.

  In order to achieve the above object, an image shake correction apparatus according to the present invention supports a movable frame that holds an anti-vibration optical element and the movable frame via a support member so as to be movable on a plane orthogonal to the optical axis. A fixed frame, first driving means for driving the movable frame in a first direction orthogonal to the optical axis, and second driving means for driving the movable frame in a second direction orthogonal to the optical axis; The first positioning portion for restricting driving in the first direction and the second positioning portion for restricting driving in the second direction, and the first and second positioning portions are It has a rotation limiting unit that limits the rotation of the movable frame and limits the rotation of the movable frame to a position diagonally across the optical axis with respect to the straight line connecting the first and second positioning units. And

  According to the image blur correction device of the present invention, it is possible to limit the rotation in the plane perpendicular to the optical axis of the movable member without increasing the size.

Arrangement explanatory drawing of positioning part and rotation restricting part of image blur correction device of an embodiment of the present invention Sectional drawing of the retracted state of the interchangeable lens by embodiment of this invention Sectional drawing of the extension state of the interchangeable lens by embodiment of this invention Sectional drawing including the focus guide mechanism of the interchangeable lens by embodiment of this invention The perspective view of the focus mechanism of the interchangeable lens by embodiment of this invention 1 is a system block diagram of an interchangeable lens and a camera body according to an embodiment of the present invention. 1 is an exploded perspective view of an image shake correction apparatus according to an embodiment of the present invention. Explanatory drawing of the positioning part of the image blur correction apparatus of embodiment of this invention Explanatory drawing at the time of rotating centering on the 1st positioning part of the image blur correction apparatus of embodiment of this invention Explanatory drawing at the time of rotating centering on the 2nd positioning part of the image blur correction apparatus of embodiment of this invention

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Example 1]
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 2 is a diagram showing a retracted state in which the interchangeable lens 200 has a shorter overall length than the photographing state. Here, 1 denotes a first group lens, 2 denotes a first group barrel that holds the first group lens 1, and 17 denotes a first group barrel that fixes the first group barrel. Reference numeral 3 denotes a second group lens, and reference numeral 4 denotes a second group unit that holds the second group lens 3. The second group unit 4 is an image shake correction device that performs an optical image stabilization function that corrects camera shake by moving the second group lens 3 on a plane perpendicular to the optical axis. Reference numeral 5 denotes a third group lens, and reference numeral 6 denotes a third group lens barrel that holds the third group lens 5. A second group unit 4 that performs an optical image stabilization function is fixed to the subject side of the third group lens 6. Reference numeral 7 denotes a fourth group lens, and reference numeral 8 denotes a fourth group lens barrel that holds the fourth group lens 7, and is fixed to the third group lens barrel 6. Reference numeral 9 denotes a focus lens, and reference numeral 10 denotes a focus lens barrel that holds the focus lens, which is moved in the optical axis direction by a guide mechanism and a drive mechanism provided in the third group lens barrel 6 to perform a focusing operation. Reference numeral 11 denotes a fifth group lens, and reference numeral 12 denotes a fifth group barrel that holds the fifth group lens 11.

  Reference numeral 34 denotes an aperture unit that adjusts the amount of light, and is fixed to the third group barrel 6. After fixing the aperture unit 34, the second group unit 4 is also fixed to the third group barrel 6. Reference numeral 14 denotes a guide cylinder which is a holding member, and 16 denotes a cam ring which is rotatably fitted to the outer periphery of the guide cylinder 14. Reference numeral 18 denotes a cam ring urging spring that urges the cam ring 16 to the guide tube 14 at a rotational phase position different from the illustrated cross section. Reference numeral 23 denotes a fixed barrel, which fixes the guide tube 14. Reference numeral 31 denotes a printed circuit board on which a lens driving IC, a microcomputer, and the like are arranged, and is fixed to the fixed barrel 23. 27 is an external ring unit, and 32 is a mount. The mount 32 is screwed to the fixed barrel 23. The appearance ring unit is fixed between the fixed barrel 23 and the mount 32.

  Reference numeral 36 denotes a back cover, which is fixed to the mount. Reference numeral 19 denotes a manual focus ring unit, which is supported so as to be rotatable about a fixed barrel 23 as an axis. When the manual focus ring unit 19 is rotated, a sensor (not shown) detects the rotation and performs focus lens focusing control according to the rotation amount. Reference numeral 33 denotes a contact block which is connected to the printed circuit board 31 by a wiring (not shown) (such as a flexible printed circuit board) and fixed to the mount 32 with screws. Reference numeral 500 denotes a camera body, and the interchangeable lens 200 of this embodiment is bayonet-fixed to the camera body 500 by a mount 32.

  When the interchangeable lens 200 is fixed to the camera body 500 with the mount 32, the printed circuit board 31 that controls the operation of each lens can communicate with the camera body 500 through the contact block 33. Reference numeral 600 denotes an image sensor mounted on the camera body 500, which is a photoelectric conversion element such as a CMOS or CCD that receives light from a subject that has passed through the interchangeable lens 200 and converts the light into an electrical signal.

  Next, the zoom operation of each lens will be described.

  The first group barrel 2 and the first group cylinder 17 are engaged with the cam ring 7 by a roller (not shown) installed in the first group cylinder 17, and in the optical axis direction as the cam ring 7 rotates around the optical axis. Can be moved. Reference numeral 28 denotes filtering capable of fixing accessories such as an ND filter and a hood, and reference numeral 29 denotes a name ring fixed to filtering. The filtering 28 is screwed to the first group cylinder 17 and moves together with the first group cylinder. Reference numeral 15 denotes a first key ring fixed to the object side tip of the guide tube 14. Three projections (not shown) installed on the first key ring 15 are respectively engaged with three linear movement grooves (not shown) installed on the inner surface of the first group cylinder 17 to support the straight movement of the first group cylinder 17.

  The third group lens barrel 6 is engaged with the cam ring 7 by a roller (not shown), and is fixed to the second group unit 4, the diaphragm unit 34, the fourth group lens barrel 8, the focus lens barrel 10, and its guide mechanism / drive mechanism. Along with the rotation of the cam ring 7 around the optical axis together with the fifth group barrel 12, it can be moved in the optical axis direction. Reference numeral 13 denotes a second key ring fixed to the third group barrel 6. Three projections (not shown) installed on the second key ring 13 respectively engage with three rectilinear grooves (not shown) installed on the inner surface of the first group cylinder 17 to support the rectilinear movement of the third group lens barrel 6. . Reference numeral 37 denotes an urging pin, which is disposed on the above-described protrusion of the second key ring 13 and serves to suppress mechanical backlash between the rectilinear groove on the inner surface of the first group cylinder 17 and the protrusion of the second key ring 13. A mask 30 is fixed to the second group unit 4 and cuts unnecessary light.

  Reference numeral 35 denotes a manual zoom ring, which is rotatably supported by the fixed barrel 23. The cam ring 7 is connected to a manual zoom ring 35 via a cam ring roller 39, and the cam ring 7 is rotated when the user rotates the manual zoom ring 35. Although not shown, a cam groove that engages with a roller (not shown) installed in the first group cylinder 17 is installed on the outer surface of the cam ring 7, and is installed in the third group lens barrel 6 on the inner surface. A cam groove that engages with a roller (not shown) is provided. These cam grooves rotate the manual zoom ring 35 to change the interchangeable lens 200 from the retracted state of FIG. 2 to the photographing state of FIG. 3 in which the entire length of the interchangeable lens 200 is extended, and in the photographing state, between WIDE and TELE. Each lens has a trajectory that provides an optically desired lens interval.

  The rotation of the manual zoom ring 35 is detected by a sensor (not shown), and the signal is detected by the IC of the printed circuit board 31 to determine the zoom position according to the amount of rotation, and focus, image stabilization, and aperture control according to the zoom position are performed. Do. The manual zoom ring 35 is provided with a lock mechanism (not shown) so that the manual zoom ring 35 is simply rotated and the camera is not retracted from the photographing state.

  Next, a guide mechanism for the focus lens 9 and the focus lens barrel 10 will be described.

  FIG. 4 is a cross-sectional view of the interchangeable lens 200 cut along a plane passing through the long guy bar 42 and the optical axis, and a plane passing through the short guide bar 43 and the optical axis. The long guide bar 42 and the short guide bar 43 are inserted into holes provided in the third group barrel 6 and the fifth group barrel 12 and supported by being sandwiched between the third group barrel 6 and the fifth group barrel 12. . The sleeve 10a of the focus barrel 10 is engaged with the long guide bar 42 to determine the eccentric position, and the U groove 10b is engaged with the short guide bar 43 to determine the rotational position. And it is supported so that it can advance and retreat in the direction of the optical axis.

  Next, the drive mechanism of the focus lens 9 and the focus lens barrel 10 will be described.

  FIG. 5 is a perspective view of the focus lens barrel 10. A rack 41 is installed on the focus lens barrel 10 supported as described above. In addition, the AF motor 40 and the U-shaped sheet metal 40a to which the AF motor 40 is attached are fixed to the third group barrel 6 with screws by an attachment mechanism (not shown). The rack 41 is provided with a male screw (not shown). The male screw is attached to the AF motor 40 and the U-shaped metal plate 40a, and is screwed with a female screw (not shown) of a screw 40b that rotates together with a rotating portion in the AF motor. When a voltage is applied to the AF motor 40, the screw 40b rotates, the rack 41 moves along the screw, and the focus barrel 10 advances and retreats along the guide bar (that is, along the optical axis). .

  In the present embodiment, the AF motor 40 employs a stepping motor, and the focus barrel 10 can be moved to a desired position with respect to the reference position by controlling voltage application to the stepping motor. Here, the position reference of the focus lens barrel 10 is determined by electrically detecting the switching between light shielding / transmission of a photo interrupter (not shown) by a light shielding wall (not shown) attached to the focus lens barrel 10.

  FIG. 6 shows an electrical configuration of the camera system of the interchangeable lens 200 and the camera body 500 which is the optical apparatus of the present embodiment.

  Reference numeral 501 denotes a camera CPU constituted by a microcomputer. The camera CPU 501 controls the operation of each unit in the camera body 500. The camera CPU 501 communicates with the lens CPU 201 provided in the lens barrel 200 via the electrical contacts 102 and 202 when the lens barrel 200 is mounted. Information (signals) transmitted from the camera CPU 101 to the lens CPU 201 includes focus lens drive amount information, parallel shake information, and focus shake information. The information (signal) transmitted from the lens CPU 201 to the camera CPU 501 includes imaging magnification information. The electrical contacts 102 and 202 include contacts for supplying power from the camera body 500 to the lens barrel 200.

  A power switch 503 that can be operated by the photographer is a switch for starting the camera CPU 501 and starting power supply to each actuator, sensor, and the like in the camera system. Reference numeral 504 denotes a release switch that can be operated by the photographer, and includes a first stroke switch SW1 and a second stroke switch SW2. A signal from the release switch 504 is input to the camera CPU 101. The camera CPU 101 enters a shooting preparation state in response to the input of the ON signal from the first stroke switch SW1. In the shooting preparation state, measurement of subject brightness by the photometry unit 505 and focus detection by the focus detection unit 506 are performed. The camera CPU 501 calculates the aperture value of the aperture unit 34, the exposure amount of the image sensor 600 (in shutter seconds), and the like based on the photometric result.

  The camera CPU 501 also has a focus lens 9 for obtaining a focus state for the subject based on focus information (defocus amount and defocus direction) that is a result of detection of the focus state of the photographing optical system by the focus detection unit 506. The drive amount (including the drive direction) of the focus barrel 10 is determined. The information on the driving amount (focus lens driving amount information) is transmitted to the lens CPU 201. The lens CPU 201 controls the operation of each component of the interchangeable lens 200.

  Furthermore, when the camera CPU 101 enters a predetermined shooting mode, the camera CPU 101 starts shift driving of the second group unit 4, that is, control of the image stabilization operation. When an ON signal is input from the second stroke switch (SW2), the camera CPU 501 transmits an aperture drive command to the lens CPU 201 to set the aperture unit 34 to the previously calculated aperture value. In addition, the camera CPU 501 transmits an exposure start command to the exposure unit 507 to perform a mirror retracting operation (not shown) and an opening operation of a shutter (not shown), and the imaging unit 508 including the imaging device 600 captures the subject image. Photoelectric conversion, that is, exposure operation is performed.

  An image pickup signal from the image pickup unit 508 (image pickup element 600) is digitally converted by a signal processing unit in the camera CPU 501 and further subjected to various correction processes to be output as an image signal. An image signal (data) is recorded and stored in a recording medium such as a semiconductor memory such as a flash memory, a magnetic disk, or an optical disk in an image recording unit 509.

  Reference numeral 204 denotes an MF ring rotation detection unit, which includes a manual focus ring unit 19 and its rotation detection unit.

  Reference numeral 205 denotes a ZOOM ring rotation detection unit, which includes a manual zoom ring 35 and a sensor (not shown) that detects the rotation.

  Reference numeral 206 denotes an IS drive unit, which includes a drive actuator of the second group unit 4 that performs a vibration isolation operation and a drive circuit thereof.

  Reference numeral 209 denotes an AF driving unit that performs AF driving of the focus barrel 10 through the AF motor 40 in accordance with the focus lens driving amount information transmitted from the camera CPU 501.

  An electromagnetic aperture driving unit 208 is controlled by the lens CPU 201 that has received an aperture driving command from the camera CPU 101, and operates the aperture unit 34 shown in FIG. 2 in an opening state corresponding to a specified aperture value.

  Reference numeral 211 denotes an angular velocity sensor mounted on the interchangeable lens 200 and connected to the printed circuit board 31. The angular velocity sensor 211 outputs to the lens CPU 201 angular velocity signals indicating respective angular velocities of vertical (pitch direction) shake and lateral (yaw direction) shake, which are angular shakes of the camera system. The lens CPU 201 integrates the pitch velocity and yaw angular velocity signals from the angular velocity sensor 211 electrically or mechanically, and the pitch direction shake amount and the yaw direction shake amount, which are displacement amounts in the respective directions (summarizing them). (Also referred to as angular deflection). Then, the lens CPU 201 controls the IS driving unit 206 based on the above-described combined displacement amount of the angular shake amount and the parallel shake amount to shift-drive the second group unit 4, thereby performing the angular shake correction and the parallel shake correction.

  Further, the lens CPU 201 controls the AF driving unit 209 based on the focus shake amount to drive the focus lens barrel 10 in the optical axis direction and performs focus shake correction.

  Next, the configuration of the second group unit 4 that is an image blur correction device will be described with reference to FIG.

  In the second group unit 4, a movable frame 407 that holds the second group lens 3 that is an image blur correction lens is supported by a shift base 401 via a ball 405 so as to be movable in a plane perpendicular to the optical axis. A sensor base 408 provided with a Hall element 409 for detecting the position of the movable frame 407 is fastened and fixed to the shift base 401 by screws 410.

  The movable frame 407 is positioned in the optical axis direction by the coil spring 403 with respect to the shift base 401 via the shift ball 405. A magnet 406 is bonded and fixed to the movable frame 407, and a yoke 411 (noted in FIG. 1) is fixed by thermal caulking in FIG. The shift base 401 has a coil unit 404 bonded thereto and includes a damping member 402 for suppressing resonance of the movable frame 407.

  The magnet 406 is two-pole magnetized so as to generate an equal magnetic force in a predetermined direction. That is, the polarities are made different so that the plane direction is divided into two equal parts, and the thickness direction perpendicular to the plane direction is also divided into two equal parts.

  The coil unit 404 is configured by winding a conducting wire as a coil around a bobbin. When a current is passed through the coil unit 404, a Lorentz force is generated in the direction substantially perpendicular to the longitudinal direction of the coil unit due to the repulsion between the magnetic lines generated in the magnet 406 and the coil unit 404. As a result, the movable frame 407 moves relative to the shift base 401 in the direction perpendicular to the optical axis.

  Since the magnet 406 and the coil unit 404 are arranged in two directions (X direction and Y direction) orthogonal to each other, the movable frame 407 can be driven in two directions orthogonal to the optical axis. it can. By combining these two driving forces, the movable frame 407 can freely move within a predetermined range within the plane orthogonal to the optical axis.

  The hall element 409 is soldered to a flexible printed cable (not shown), and converts the magnetic flux density from the magnet 406 into an electrical signal.

  When the movable frame 407 is driven in the X direction, a change in the magnetic flux density from the magnet 406 (a) is detected by the Hall element 409 (a), and an electrical signal corresponding to the change in the magnetic flux density is output. Based on this electrical signal, the position of the movable frame 407 in the X direction can be detected.

  When the movable frame 407 is driven in the Y direction, a change in the magnetic flux density from the magnet 406 (b) is detected by the Hall element 409 (b), and an electrical signal corresponding to the change in the magnetic flux density is output. Based on this electrical signal, the position of the movable frame 407 in the Y direction can be detected.

  Next, the drive restriction of the movable frame 407 will be described with reference to FIG. Moreover, the line shown with the dotted line in the figure represents the hidden line. FIG.1 (b) has shown sectional drawing of the AA cross section shown in Fig.1 (a).

  The movable frame 407 includes positioning portions 407 (a) and 407 (b) for restricting driving in the X direction and the Y direction. The positioning portions 407 (a) and 407 (b) are convex toward the shift base 401. The shift base 401 is formed with concave positioning receiving portions 401 (a) and 402 (b) at positions corresponding to the positioning portions 407 (a) and 407 (b). The positioning receiving portions 401 (a) and 402 (b) have contact surfaces that contact the positioning portions 407 (a) and 407 (b) in the + direction and the − direction, respectively.

  The driving range in the X direction is restricted by the positioning portion 407 (a) coming into contact with the positioning receiving portion 401 (a). The drive range in the Y direction is restricted by the positioning portion 407 (b) coming into contact with the positioning receiving portion 401 (b). FIG. 8 shows a state where driving is restricted in the X and Y directions, respectively. Each of the positioning portions 401 (a) and 401 (b) is desirably arranged on the driving force line (denoted as Lx and Ly in FIG. 1) of the actuator generating the driving force in the driving restriction direction. With such an arrangement, when the movable frame 401 is driven by the actuator and the positioning portion 401 (a) or 401 (b) comes into contact with the drive restriction position, a rotational moment is generated and the movable frame 401 rotates. Can be suppressed.

  In the image blur correction apparatus of this embodiment, the movable frame 407 is pulled into the shift base 401 by the coil spring 403. The pull-in force of the coil spring 403 is the Lorentz force generated in the actuator during normal image blur correction. Therefore, the rotation in the plane orthogonal to the optical axis is set so as not to occur. Therefore, at the time of normal image blur correction, the movable frame 407 does not rotate substantially in the plane orthogonal to the optical axis. A large pull-in force by the coil spring 403 causes an increase in power consumption during image blur correction. Therefore, the pull-in force is set as small as possible within a range where rotation in the plane orthogonal to the optical axis during image blur correction can be suppressed. ing.

  Therefore, when a strong impact is applied to the interchangeable lens 100 from the outside, the movable frame 407 can freely move and rotate within the plane orthogonal to the optical axis by the impact force. When the movable frame 401 is freely moved and rotated, there is a possibility that the movable frame 401 interferes with other parts, and the movable frame 401 and other parts are damaged or a characteristic defect is caused by deformation. Normally, the image blur correction device is provided with a stopper for restricting the driving range, so that the movement is limited. However, it is necessary to provide a large relief to prevent interference even when the image blur correction device is rotated. To do. Therefore, in order to avoid an increase in the size of the image blur correction device, a means for limiting the rotation in the plane orthogonal to the optical axis when an impact is applied is necessary.

  The movable frame 407 includes a rotation limiting portion 407 (c) that is convex in the direction perpendicular to the optical axis. The shift base 401 includes rotation limit receiving portions 401 (c) and (d) at positions corresponding to the rotation limiting portion 407 (c). The rotation limiting unit 407 (c) is a magnet 406 (a) for driving in the X direction and the Y direction on the opposite side of the optical axis with respect to the straight line connecting the positioning units 407 (a) and 407 (b). , 406 (b).

  Next, the rotation limitation within the plane orthogonal to the optical axis when an impact is applied will be described with reference to FIGS.

  When an impact is applied from the outside, the movable frame 407 is first moved freely, and one of the positioning portions 407 (a) and 407 (b) corresponds to the corresponding positioning receiving portion 401 (a) or 401 (b). Abut against either. Next, it rotates around the positions of the contacted positioning portions 407 (a) and 407 (b). Which of the positioning receiving portions 401 (a) and 401 (b) abuts when an impact is applied, and which direction of rotation is determined by the direction from which the impact is applied. FIG. 9 shows the relationship when the positioning portion 401 (a) contacts and rotates, and FIG. 10 shows the relationship when the positioning portion 401 (b) contacts and rotates. An arrow F shown in FIGS. 9 and 10 indicates an example of the direction of impact applied from the outside.

  FIG. 9A shows a rotation limit state when the positioning portion 401 (a) abuts on the + side and the movable frame 407 rotates clockwise (denoted as cw in the drawing). At this time, the rotation of the movable frame 407 is restricted by the positioning portion 407 (b) coming into contact with the positioning receiving portion 401 (b).

  Next, FIG. 9B shows a rotation limit state when the positioning portion 401 (a) abuts on the + side and the movable frame 407 rotates counterclockwise (denoted as ccw in the drawing). At this time, the rotation restriction of the movable frame 407 is restricted by the rotation restriction portion 407 (c) coming into contact with the rotation restriction receiving portion 401 (d). Although details of FIGS. 9C and 9D and FIGS. 10A to 10D are omitted, the movable frame is similarly limited in rotation as shown in the figure.

  As described above, when the positioning portions 407 (a) and 407 (b) are brought into contact with each other depending on the impact acting direction when an impact is applied to the image blur correction device, the rotation is limited, and the positioning portions 407 (a) or 407 ( There is a case where rotation is restricted by abutting b) and the rotation restriction unit 401 (c).

  As described above, in the present invention, the positioning portion for restricting the drive range of the movable frame is also used as the rotation restriction for restricting the rotation. Therefore, it is not necessary to consider the escape amount at the drive restriction position, compared to the case where a positioning unit and separate rotation limiting units are provided at a plurality of locations, so that rotation can be limited at a smaller angle and the image blur correction device can be enlarged. Can be prevented. In addition, by providing the rotation restricting portion on the opposite side of the optical axis with respect to the line connecting the two position restricting portions, the distance from the two position restricting portions can be increased, and at a smaller angle. The rotation can be restricted and the image blur correction apparatus can be prevented from being enlarged.

  In addition, since the distance from the two position restricting portions can be made substantially equal by disposing it at a position sandwiched between the two drive actuators, only one rotation limiting portion is required, and the space of the apparatus can be saved. For example, if the position restricting portion is provided at a diagonal position across the optical axis, the rotation can be restricted at a smaller angle. However, since each rotation restricting portion is required for each position restricting portion, the device Increases in size.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

  In the above-described embodiment, the positioning portion has a convex shape provided on the movable frame and the positioning receiving portion has a concave shape provided on the shift base. However, the present invention is not limited thereto. For example, the positioning portion may be a convex shape, and the positioning portion may be a through hole. Further, the positioning portion may be provided on the shift base and the positioning receiving portion on the movable frame.

  In the above embodiment, the rotation restricting portion has a convex shape, but is not limited thereto. For example, the rotation restricting portion may be concave.

  In the above-described embodiments, the interchangeable lens has been described. However, the image shake correction apparatus according to the present invention can be applied to an imaging apparatus integrally provided in a camera body, a digital still camera, a video camera, or the like.

1 ... 1 group lens 2 ... 1 group lens barrel 3 ... 2 group lens (anti-vibration lens)
4 ... 2 group unit (image blur correction device) 5 ... 3 group lens 6 ... 3 group lens barrel 7 ... 4 group lens 8 ... 4 group lens tube 9 ... focus lens 10 ... Focus lens barrel 11 ... 5 group lens 12 ... 5 group lens barrels 201, 204, 205 ... Physical stop 401 ... Shift base 401 (a), (b) ... Positioning receiver Numerals 401 (c), (d) Rotation restriction receiving portion 402 Damping member 403 Coil spring 404 Coil unit 405 Ball 406 Magnet
407 ... movable frame 407 (a), (b) ... positioning part 407 (c) ... rotation restriction part 408 ... sensor base 409 ... Hall sensor 410 ... screw

Claims (5)

A movable frame that holds the vibration-proof optical element;
A fixed frame that supports the movable frame movably on a plane orthogonal to the optical axis via a support member;
First driving means for driving the movable frame in a first direction orthogonal to the optical axis;
Second driving means for driving the movable frame in a second direction orthogonal to the optical axis;
A first positioning mechanism for restricting driving of the movable frame in the first direction relative to the fixed frame;
Having a second positioning mechanism for restricting driving of the movable frame in the second direction relative to the fixed frame;
The first and second positioning mechanisms limit the rotation of the movable frame;
An image blur correction apparatus comprising: a rotation limiting mechanism that limits the rotation of the movable frame on the opposite side across an optical axis with respect to a straight line connecting the first and second positioning mechanisms.   2. The image blur correction device according to claim 1, wherein the rotation limiting mechanism is provided at a position sandwiched between the first and second driving units.   The first positioning mechanism is provided on the opposite side of the first driving means with the optical axis in between, and the second positioning mechanism is provided on the opposite side of the second driving means with the optical axis in between. The image blur correction apparatus according to claim 1, wherein the image blur correction apparatus is provided.   The first and second positioning mechanisms include first and second positioning portions provided on one of the movable frame and the fixed frame, and first and second positioning units provided on the other of the movable frame and the fixed frame. The image blur correction apparatus according to claim 1, further comprising a receiving portion.   The rotation limiting mechanism includes a rotation limiting portion provided on one of the movable frame or the fixed frame and a rotation receiving portion provided on the other of the movable frame or the fixed frame. The image blur correction apparatus described.