JP6444748B2 - Optical unit with shake correction function - Google Patents

Description

  The present invention relates to an optical unit with a shake correction function mounted on a camera-equipped mobile phone or the like.

  In an optical unit used in an imaging device or the like mounted on a portable terminal, a drive recorder, or an unmanned helicopter, it is necessary to perform shake correction in order to suppress disturbance of a captured image due to shake. For such shake correction, the imaging unit is supported in a swingable manner with respect to the support, and the imaging unit is moved in the pitching direction and pitching (pitch: tilting) and yawing (roll: panning). Techniques for correcting shake by swinging in the yawing direction have been proposed (see Patent Documents 1 and 2).

  Further, a technique for correcting a shake (rolling) around the optical axis of the imaging unit has been proposed (see, for example, Patent Document 3). In the optical unit described in Patent Document 3, the panning drive coil and the rolling drive coil are integrated or adjacent with a common yoke, and the tilting drive coil and the rolling drive coil are integrated or adjacent with a common yoke. is there.

JP 2010-96805 A JP 2010-96863 A International Publication WO2011 / 155178

  However, as in the configuration described in Patent Document 3, the panning drive coil and the rolling drive coil are integrated or adjacent with a common yoke, and the tilting drive coil and the rolling drive coil are integrated or adjacent with a common yoke. In this case, there is a problem that the control becomes extremely complicated because magnetic interference occurs during correction in each direction. In addition, the configuration described in Patent Document 3 has a problem that a sufficient torque cannot be obtained because the Lorentz force is used. Further, in the configuration described in Patent Document 3, when detecting the angular position around the optical axis, the angular position in the rolling direction is detected in the vicinity of the magnet and the magnetic sensor for detecting the tilt in the panning direction and the tilting direction. Since the magnetic magnet and the magnetic sensor are provided, the layout for configuring the detection unit is complicated, and the number of parts is large.

  In view of the above problems, an object of the present invention is to perform rolling correction independently of pitching and yawing with sufficient torque, and to detect the angular position in the rolling direction with a simple configuration. It is an object of the present invention to provide an optical unit with a shake correction function that can be used.

In order to solve the above-described problems, an optical unit with a shake correction function according to the present invention includes a movable body that holds an optical element, and the movable body is swung around two axes orthogonal to the optical axis of the optical element. An optical module including a support body that can be supported and a swinging drive mechanism that reciprocally swings the movable body around the two axes with respect to the support body, and the optical module is rotated about the optical axis. A rolling correction driving mechanism; and an angular position detection sensor for detecting an angular position of the optical module around the optical axis. The rolling correction driving mechanism includes a plurality of salient poles in the circumferential direction. A stator core, a stator coil wound around the salient pole, and a surface facing the salient pole in the radial direction, and a surface facing the salient pole in the radial direction are alternately magnetized in the circumferential direction with S and N poles. Magnetized surface A motor having a rotor magnet, wherein the angular position detection sensor is characterized in that the said stator core with respect to said rotor magnet is a magnetic sensor facing the opposite side.

  In the present invention, the optical module is provided with a movable body that holds the optical element and a swinging drive mechanism, and the optical module performs pitching correction and yawing correction. For rolling correction, the optical module is optically moved by the rolling correction drive mechanism. Rotate around the axis. For this reason, since the rolling correction is performed independently of the pitching correction and the yawing correction, the shake correction can be easily controlled. If no rolling correction is required, the optical module can be used alone. In addition, a motor is used for the rolling correction drive mechanism, and since such a motor uses the attractive force and the repulsive force of the rotor magnet, a large torque can be obtained as compared with the case where the Lorentz force is used. Can do. In addition, since the angular position detection sensor that detects the angular position around the optical axis of the optical module is configured by the magnetic detection element facing the rotor magnet of the motor used in the rolling correction drive mechanism, the optical module has a simple configuration. The angular position around the optical axis can be detected. Even in that case, since the magnetic detection element faces the rotor magnet on the side opposite to the stator core, the magnetic detection element detects the angular position around the optical axis of the optical module without being affected by the stator core. be able to. The magnetic detection element faces the rotor magnet on the side opposite to the magnetized surface (the surface facing the stator core), and the rotor magnet has a magnetic flux density distribution in the circumferential direction on the side opposite to the magnetized surface. It changes gently continuously. For this reason, the linearity of the output from the magnetic detection element is high.

  In this invention, it is preferable that the said rotor magnet is facing the said salient pole on the radial direction outer side. According to this configuration, since the rotor magnet has a longer circumferential dimension than the case where the rotor magnet faces the salient pole on the radially inner side, the resolution of the detection result of the magnetic detection element is higher.

  In the present invention, the rolling correction drive mechanism includes a back yoke on a radially outer side of the rotor magnet, and the magnetic detection element is exposed from an end portion of the back yoke when viewed from the radially outer side. It is preferable that it is facing the part which is doing. According to such a configuration, even when the back yoke is arranged on the radially outer side of the rotor magnet, the back yoke hardly affects the detection result of the magnetic detection element.

  In the present invention, it is preferable that the magnetic detection element is disposed on a radially outer side than a radially outer surface of the back yoke. According to such a configuration, since the magnetic detection element and the rotor magnet are sufficiently separated from each other, the distribution of the magnetic flux density in the circumferential direction changes continuously and gently. For this reason, the linearity of the output from the magnetic detection element is high.

  In the present invention, it is preferable that the size of the portion where the rotor magnet is exposed from the end portion of the back yoke when viewed from the outside in the radial direction is equal to or less than the thickness of the rotor magnet. According to this configuration, even when the rotor magnet is exposed from the end portion of the back yoke, it is possible to suppress a decrease in strength of the rotor magnet.

  In the present invention, it is preferable that the magnetic detection element is opposed to a magnetic pole boundary line between the N pole and the S pole of the rotor magnet when the rolling correction driving mechanism is stopped. According to this configuration, the output linearity from the magnetic detection element is high.

  In the present invention, the motor comprises a bearing that rotatably supports the rotor magnet, a bearing holder that holds the bearing, a support member that holds the bearing holder, a circuit board fixed to the support member, It is preferable that the magnetic detection element is mounted on the circuit board. According to this configuration, the magnetic detection element can be arranged with a simple configuration.

  In the present invention, the support member includes a bottom plate portion that holds the bearing holder on the opposite output side of the motor, and a side plate portion that is bent from the bottom plate portion toward the output side, and the circuit board includes: It is preferable that the end of the side plate and the end of the bottom plate are in contact with each other. According to this configuration, the single-phase motor can be protected by the support member. In addition, the circuit board can be securely fixed, and the single-phase motor can be protected also by the circuit board.

  In the present invention, the magnetic detection element is preferably a Hall element. According to such a configuration, it is possible to detect in which direction of the circumferential direction the rotor magnet is moving based on the output from the Hall element.

  In the present invention, the optical module is provided with a movable body that holds the optical element and a swinging drive mechanism, and the optical module performs pitching correction and yawing correction. For rolling correction, the optical module is optically moved by the rolling correction drive mechanism. Rotate around the axis. For this reason, since the rolling correction is performed independently of the pitching correction and the yawing correction, the shake correction can be easily controlled. If no rolling correction is required, the optical module can be used alone. In addition, a motor is used for the rolling correction drive mechanism, and since such a motor uses the attractive force and the repulsive force of the rotor magnet, a large torque can be obtained as compared with the case where the Lorentz force is used. Can do. In addition, since the angular position detection sensor that detects the angular position around the optical axis of the optical module is configured by the magnetic detection element facing the rotor magnet of the motor used in the rolling correction drive mechanism, the optical module has a simple configuration. The vibration around the optical axis can be detected. Even in that case, since the magnetic detection element faces the rotor magnet on the opposite side to the stator core, the magnetic detection element can detect a shake around the optical axis of the optical module without being affected by the stator core. Can do. The magnetic detection element faces the rotor magnet on the side opposite to the magnetized surface (the surface facing the stator core), and the rotor magnet has a magnetic flux density distribution in the circumferential direction on the side opposite to the magnetized surface. It changes gently continuously. For this reason, the linearity of the output from the magnetic detection element is high.

It is explanatory drawing which shows typically a mode that the optical unit to which this invention is applied was mounted in the optical instrument. It is explanatory drawing of the optical unit to which this invention is applied. It is a disassembled perspective view which shows the internal structure of the optical unit to which this invention is applied. In the optical unit to which the present invention is applied, it is an exploded perspective view showing a positional relationship and the like between the optical module and a rolling drive mechanism. It is a disassembled perspective view when the optical module of the optical unit to which the present invention is applied is viewed from the subject side. It is explanatory drawing which shows the cross-sectional structure of the optical unit to which this invention is applied. It is explanatory drawing of the drive mechanism for rolling correction | amendment of the optical unit to which this invention is applied. It is sectional drawing of the drive mechanism for rolling correction | amendment of the optical unit to which this invention is applied. It is explanatory drawing which shows operation | movement of the single phase motor of the optical unit to which this invention is applied. It is explanatory drawing which shows the cogging torque of the single phase motor of the optical unit to which this invention is applied. It is explanatory drawing of the stopper mechanism of the optical unit to which this invention is applied. It is explanatory drawing of the angular position detection sensor comprised to the optical unit to which this invention is applied. It is explanatory drawing which shows the modification of the drive mechanism for rolling correction | amendment of the optical unit to which this invention is applied.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, a configuration for preventing shake of the imaging optical unit is illustrated. In the following description, an optical unit with a shake correction function is simply referred to as an “optical unit”. In the following description, the three directions orthogonal to each other are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively, and the direction along the optical axis L (lens optical axis / optical axis of the optical element) is defined as the Z-axis direction. The direction orthogonal to the Z-axis direction is defined as the Y-axis direction, and the direction intersecting the Z-axis direction and the Y-axis direction is defined as the X-axis direction. Further, in the following description, of the shakes in each direction, rotation around the X axis corresponds to pitching (pitch), rotation around the Y axis corresponds to yawing (rolling), and rotation around the Z axis is Corresponds to rolling. Also, + X is attached to one side in the X axis direction, -X is attached to the other side, + Y is attached to one side in the Y axis direction, -Y is attached to the other side, and Z axis One side of the direction (opposite the subject side / optical axis direction rear side) is denoted by + Z, and the other side (subject side / optical axis direction front side) is denoted by -Z.

(Overall configuration of optical unit for shooting)
FIG. 1 is an explanatory diagram schematically showing a state in which an optical unit 300 to which the present invention is applied is mounted on an optical device 1000.

  An optical unit 300 (an optical unit with a shake correction function) illustrated in FIG. 1 includes an optical module 100 including an optical element such as a lens 1a having an optical axis L extending along the Z-axis direction. It is used for an optical apparatus 1000 such as an image pickup apparatus mounted on a drive recorder or an unmanned helicopter. The optical unit 300 is mounted in a state where it is supported by the chassis 2000 (device main body) of the optical device 1000. In the optical unit 300, if a shake or the like occurs in the optical device 1000 during shooting, the captured image is disturbed. Therefore, in the optical unit 300, the shake is detected by a shake detection sensor such as a gyroscope. In the optical module 100, the movable body 10 (imaging unit) that holds the lens 1a and the like is placed on the optical axis L by a swing drive mechanism (not shown in FIG. 1) described later based on the detection result of the shake detection sensor. Pitching and yawing are corrected by swinging around two axes (X-axis and Y-axis) orthogonal to. In this embodiment, the optical unit 300 is further provided with a rolling correction drive mechanism 70, and the optical module 100 is rotated around the Z axis (around the optical axis L) based on the detection result of a shake detection sensor such as a gyroscope. Correct rolling.

(Overall configuration of optical unit 300)
FIG. 2 is an explanatory diagram of the optical unit 300 to which the present invention is applied. FIGS. 2A and 2B are a perspective view of the optical unit 300 and an exploded view of the optical unit 300 with the unit case 310 removed. It is a perspective view. FIG. 3 is an exploded perspective view showing the internal structure of the optical unit 300 to which the present invention is applied. FIG. 4 is an exploded perspective view showing the positional relationship between the optical module 100 and the rolling correction driving mechanism 70 in the optical unit 300 to which the present invention is applied.

As shown in FIGS. 2, 3, and 4, the optical unit 300 of the present embodiment includes a unit case 310 extending in the Z direction, and one side in the Z direction + Z is provided inside the unit case 310. The control unit 350, the rolling correction drive mechanism 70, and the optical module 100 are arranged in this order from the other side -Z. The unit case 310 includes a control unit 350,
A structure in which the first case member 320 and the second case member 330 that cover the rolling correction driving mechanism 70 and the optical module 100 from both sides in the Y-axis direction are fixed to the support member 77 of the rolling correction driving mechanism 70 by screws 340. Have.

  In the unit case 310, a spacer 171 is held at the end of the other side −Z in the Z-axis direction so as to cover the optical module 100, and a cover glass 172 is disposed between the spacer 171 and the optical module 100. ing.

  The control unit 350 includes a first substrate 351 on which a connector, an IC, and the like are mounted, and a second substrate 352 that performs input and output of signals with the outside. The optical unit 300 also includes a flexible wiring board 353 that connects the optical module 100 and the first substrate 351.

  The optical unit 300 includes a circuit board 76 on which a control circuit of the rolling correction driving mechanism 70 and the like are configured, and a flexible wiring board 78 connected to the other side-Y side surface of the optical module 100 in the Y-axis direction. Have. A gyroscope 781 for detecting a shake (rolling) around the optical axis L of the optical module 100 is mounted on one end of the flexible wiring board 78 connected to the optical module 100. The side end is connected to the circuit board 76.

(Overall configuration of optical module 100)
FIGS. 5A and 5B are exploded perspective views of the optical module 100 of the optical unit 300 to which the present invention is applied as viewed from the subject side. FIGS. 5A and 5B are exploded perspective views of the entire optical module 100, and FIG. It is a disassembled perspective view of movable body 10 grade | etc.,. FIG. 6 is an explanatory diagram showing a cross-sectional configuration of the optical unit 300 to which the present invention is applied. FIGS. 6A and 6B are a YZ cross-sectional view of the optical unit 300 and a ZX cross-sectional view of the optical unit 300. is there.

  5 and 6, the optical module 100 of the present embodiment includes a support 20, a movable body 10 including the imaging module 1, and a state in which the movable body 10 is swingably supported with respect to the support 20. And a rocking drive mechanism 50 formed between the movable body 10 and the support body 20. The rocking drive mechanism 50 is orthogonal to the optical axis L. The movable body 10 is swung around the two axes (the first axis L1 and the second axis L2).

  The support 20 includes a module case 21. The module case 21 includes a rectangular tube-shaped body portion 211 surrounding the movable body 10 and a rectangular frame-shaped end plate portion projecting radially inward from an end portion on the other side −Z of the body portion 211 in the Z-axis direction. 212, and a rectangular opening 213 is formed in the end plate portion 212. Further, the support 20 includes a cover 22 fixed to the other side −Z of the module case 21 in the Z-axis direction, and a cover sheet 23 fixed to the other side −Z of the cover 22 in the Z-axis direction (FIGS. 3 and not shown in FIG. The cover 22 includes a plate-shaped frame portion 221 that overlaps the end plate portion 212 of the module case 21, and a rectangular tube-shaped side plate portion 222 that is bent from the inner edge of the frame portion 221 to one side + Z in the Z-axis direction. The side plate portion 222 is inserted into the module case 21 from the opening 213 of the module case 21. Triangular plate-like connecting portions 223 are formed at four corners of the side plate portion 222 on one side in the Z-axis direction + Z, and a fixing frame 25 described later is fixed to the connecting portion 223. A hole 224 is formed. The cover sheet 23 is provided with a window 230 that guides light from the subject to the lens 1a.

The support 20 has a rectangular first bottom plate 24 that covers one side + Z of the module case 21 in the Z-axis direction. The first bottom plate 24 includes a rectangular bottom plate portion 241 and a side plate portion 242 protruding from the outer edge of the bottom plate portion 241 toward the other side −Z in the Z-axis direction. The first bottom plate 24 is formed with an opening 240 for drawing the flexible wiring boards 18 and 19 connected to the optical module 100 to the outside. The opening 240 is in the Z-axis direction with respect to the first bottom plate 24. Is covered by a second bottom plate 26 that overlaps from one side + Z. Further, the support body 20 has a rectangular frame-shaped plate-shaped stopper 28 disposed so as to surround the movable body 10, and the plate-shaped stopper 28 is one side + Z in the Z-axis direction of the movable body 10. Defines the range of movement to. In the plate-like stopper 28, a convex portion 281 protruding outward is formed on the outer peripheral edge of each side. Therefore, when the first bottom plate 24 and the module case 21 are overlapped in the Z direction, the convex portion 281 of the plate-like stopper 28 is sandwiched between the side plate portion 242 of the first bottom plate 24 and the body portion 211 of the module case 21. It becomes a state. Accordingly, if the side plate portion 242 of the first bottom plate 24, the body portion 211 of the module case 21 and the convex portion 281 of the plate-like stopper 28 are joined by welding or the like, the first bottom plate 24, the plate-like stopper 28 and the module case 21 are joined. Can be integrated.

  The movable body 10 includes an imaging module 1 including an optical element such as a lens 1 a and a weight 15. The imaging module 1 includes a holder 14 that holds the lens 1 a and a frame 11 that holds the holder 14, and coils 56 are provided at both end portions in the X-axis direction and both end portions in the Y-axis direction of the frame 11. Is retained. The holder 14 holds a lens 1a, an actuator for focusing driving (not shown), an imaging circuit module 16 including an imaging element and the like. The weight 15 is a nonmagnetic metal part fixed to the holder 14 and adjusts the position of the center of gravity of the movable body 10 in the optical axis L direction.

  The movable body 10 is connected to a flexible wiring board 18 for signal output for outputting a signal obtained by the imaging circuit module 16. A portion of the flexible wiring board 18 that overlaps the holder 14 is connected to the movable body 10. A gyroscope 187 and an electronic component 188 are mounted. The flexible wiring board 18 is drawn out of the support body 20 after being pulled out from the movable body 10 and then curved at a plurality of locations. In the flexible wiring board 18, a spacer 180 is disposed between a portion drawn from the movable body 10 and the movable body 10, and the lead-out portion of the flexible wiring board 18 extends from the movable body 10 to one side + Z in the Z-axis direction. It extends at a spaced position.

  The movable body 10 is connected to a flexible wiring substrate 19 for supplying power to the coil 56, and the distal end portion of the flexible wiring substrate 19 is connected to the distal end portion 184 of the flexible wiring substrate 18. The flexible wiring boards 18 and 19 are connected to the flexible wiring board 353 via a connector 185 mounted on the front end 184 of the flexible wiring board 18.

  The swing drive mechanism 50 is a magnetic drive mechanism using a plate-like magnet 52 and a coil 56. The coil 56 is held by the movable body 10, and the magnets 52 are held on the inner surfaces on both sides in the X-axis direction and the inner surfaces on both sides in the Y-axis direction of the body portion 211 of the module case 21. The magnet 52 is magnetized with different poles on the outer surface side and the inner surface side. The magnet 52 is divided into two in the optical axis L direction, and is magnetized so that the magnetic poles located on the coil 56 side are different in the optical axis L direction. For this reason, as for the coil 56, an upper and lower long side part is utilized as an effective side. The module case 21 is made of a magnetic material and functions as a yoke for the magnet 52.

(Configuration of gimbal mechanism 30 etc.)
In the optical module 100, in order to correct the shake in the pitching direction and the yawing direction, the movable body 10 is supported so as to be swingable around the first axis L1 intersecting the optical axis L direction, and the movable body 10 is supported by the optical axis L. It is necessary to swingably support the second axis L2 intersecting the direction and the first axis L1. Therefore, a gimbal mechanism 30 (support mechanism) is configured between the movable body 10 and the support body 20.

In this embodiment, when configuring the gimbal mechanism 30, a rectangular movable frame 38 is disposed between the rectangular fixed frame 25 fixed to the cover 22 and the frame 11. In the fixed frame 25, a support plate portion 251 that protrudes toward one side + Z in the Z-axis direction is formed at a corner portion that is opposite to the direction in which the first axis L1 extends among the four corner portions. Yes. Further, the fixed frame 25 is formed with convex portions 252 that protrude toward the other side −Z in the Z-axis direction at four corners.

  The movable frame 38 has a rectangular shape having four corners 381, 382, 383, 384 around the optical axis L. Of the four corner portions 381, 382, 383, and 384, the two corner portions 381 and 383 that are located diagonally in the direction in which the first axis L1 extends are fixed to the fixed frame via a sphere (not shown) or the like. The two corner portions 382 and 384 that are supported by the support plate portion 251 of the 25 in a swingable manner and are opposite to each other in the direction in which the second axis L2 extends are movable bodies via a sphere (not shown) or the like. Ten frames 11 are supported in a swingable manner. In this embodiment, the movable frame 38 is made of a metal material having a spring property, and the four connecting portions 385 that connect the four corner portions 381, 382, 383, and 384 include the extending direction and the Z axis. It has a meandering portion 386 curved in a direction perpendicular to the direction. Therefore, the movable body 10 does not bend downward due to its own weight, but has a spring property capable of absorbing the impact when an impact is applied from the outside.

  A plate that is connected between the fixed frame 25 and the cover 22 and connected to the fixed frame 25 of the movable body 10 and the support body 20 and defines the posture of the movable body 10 when the swinging drive mechanism 50 is in a stopped state. A spring 40 is provided. The plate spring 40 is a spring member obtained by processing a metal plate into a predetermined shape, and is a rectangular frame-shaped fixed body side connecting portion 41, an annular movable body side connecting portion 42, a fixed body side connecting portion 41, and a movable body side connecting portion. And a plate spring portion 43 that connects the two. The fixed body side connecting portion 41 is positioned and fixed by a convex portion 252 formed at a corner portion of the fixed frame 25 in a state where the fixed body side connecting portion 41 overlaps the surface of the other side −Z of the fixed frame 25 in the Z-axis direction. Further, the fixed frame 25 is fixed to the cover 22 in a state where the convex portion 252 is fitted in the hole 224 of the cover 22. The movable body side coupling portion 42 is fixed to the frame 11 by welding, adhesion, or the like.

(Pitching correction and yawing correction)
In the optical module 100, when the optical device 1000 shown in FIG. 1 is swung in the pitching direction and the yawing direction, the wobbling is detected by the gyroscope 187, and the swing driving mechanism 50 is controlled based on the detection result. That is, as a result of supplying a drive current that cancels the shake detected by the gyroscope 187 to the coil 56, the movable body 10 swings around the first axis L1 in the direction opposite to the shake and the second axis L2. It swings around in the direction opposite to the shake, and the shake in the pitching direction and the yawing direction is corrected.

(Overall configuration of rolling correction drive mechanism 70)
FIG. 7 is an explanatory diagram of the rolling correction drive mechanism 70 of the optical unit 300 to which the present invention is applied. FIGS. 7A and 7B are exploded views when the rolling correction drive mechanism 70 is viewed from the subject side. FIG. 4 is a perspective view and an exploded perspective view of a stator 71 of a rolling correction drive mechanism 70. FIG. 8 is a cross-sectional view of the rolling correction drive mechanism 70 of the optical unit 300 to which the present invention is applied. FIGS. 8A and 8B are a YZ cross-sectional view of the rolling correction drive mechanism 70 and rolling correction. FIG.

  As shown in FIG. 4, in the optical unit 300 of this embodiment, the optical module 100 is supported by a rotor 74 of a rolling correction drive mechanism 70 disposed on one side + Z in the Z-axis direction via a connecting member 80. Yes. The rolling correction driving mechanism 70 performs rolling correction by rotating the optical module 100 in both directions around the optical axis L within a predetermined angle range based on the detection result of the gyroscope 781 shown in FIG. .

As shown in FIGS. 4, 7, and 8, the rolling correction drive mechanism 70 is a motor 70 a, a stator 71 held by a support member 77 via a bearing holder 79, and a rotor that rotates around the optical axis L. 74. In this embodiment, the rolling correction drive mechanism 70 (motor 70a) is a single-phase motor 70b, and the stator 71 is wound around a stator core 72 having a plurality of salient poles 720 in the circumferential direction and a plurality of salient poles 720. And a stator coil 73. The salient pole 720 includes an arm portion 721 that protrudes radially outward, and a tip portion 722 that protrudes on both sides in the circumferential direction from the radially outer end portion of the arm portion 721, and a stator around the arm portion 721. A coil 73 is wound.

  In this embodiment, the motor 70a (single phase motor 70b) is an outer rotor type, and the stator core 72 has salient poles 720 projecting radially outward from the annular portion 725. The rotor 74 includes a cup-shaped rotor case 740 and a rotation shaft 745 fixed to the end plate portion 742 of the rotor case 740. The rotor 74 has a rotor magnet 75 held on the inner surface of the cylindrical body 743 of the rotor case 740, and the rotor magnet 75 faces the salient pole 720 on the outer side in the radial direction. In the rotor magnet 75, the inner peripheral surface facing the salient pole 720 is a magnetized surface 751 in which S poles and N poles are alternately magnetized at equal angular intervals in the circumferential direction. This is the surface on the side where the magnetizing head is closely arranged during magnetization. The body 743 of the rotor case 740 is a back yoke for the rotor magnet 75.

  The rotary shaft 745 is rotatably supported by bearings 701 and 702 including bearings at positions separated in the Z-axis direction. The bearings 701 and 702 are held inside the cylindrical portion 791 of the bearing holder 79. Yes. The bearing holder 79 is also used as a core holder that holds the stator core 72, and an annular portion 725 of the stator core 72 is fitted on the radially outer side of the cylindrical portion 791. A retaining ring 703 is attached to an end of one side + Z of the rotation shaft 745 in the Z-axis direction.

  The bearing holder 79 has a disk-like flange portion 792 at a position adjacent to the cylindrical portion 791 on one side + Z in the Z-axis direction, and the flange portion 792 is fixed to the support member 77 by screws 779. ing. The support member 77 is a pair of a rectangular bottom plate portion 771 to which the flange portion 792 of the bearing holder 79 is fixed, and a pair of bent portions from both ends of the bottom plate portion 771 in the X-axis direction toward the other side −Z in the Z-axis direction. Side plate portions 772 and 773, and a side plate portion 774 that is bent from one end in the Y-axis direction + Y of the bottom plate portion 771 toward the other side −Z in the Z-axis direction. The side plate portions 772, 773, and 774 are opposed to the body portion 743 of the rotor case 740 on the outer side in the radial direction, and serve as protection plates for the motor 70a.

(Detailed configuration of the rolling correction drive mechanism 70)
FIG. 9 is an explanatory diagram showing the operation of the single-phase motor 70b of the optical unit 300 to which the present invention is applied, and FIGS. 9A and 9B show how the rotor 74 rotates counterclockwise CCW. It is explanatory drawing and explanatory drawing which shows a mode that the rotor 74 rotates clockwise CW. FIG. 10 is an explanatory diagram showing the cogging torque of the single-phase motor 70b of the optical unit 300 to which the present invention is applied. 10 (a) is a graph showing the relationship between the angle θ of the rotor 74 and the cogging torque, and FIG. 10 (b) is an explanation showing the definition of the direction in the graph shown in FIG. 10 (a). FIG. The gogging torque shown in FIG. 10A is a torque acting on the rotor 74 when the rotor 74 is held at a position rotated by an angle θ, as shown in FIG. 10B. Is rotated when the rotor 74 is rotated in the counterclockwise direction, + is set when the rotor 74 is rotated clockwise, and the gogging torque is set as + when the rotor 74 is rotated counterclockwise. The direction of clockwise rotation is −. Accordingly, in FIG. 10A, the cogging torque rotates the rotor 74 clockwise when the rotor 74 is moved in the counterclockwise direction (θ is the + direction) among the points where the cogging torque becomes zero in FIG. Acting in the direction (− direction) to cause the cogging torque to rotate the rotor 74 counterclockwise when the rotor 74 is moved in the clockwise direction (θ is in the − direction) (
The point acting in the + direction corresponds to a “stable point” where a torque that prevents the rotor 74 from rotating in any of the circumferential directions is generated. On the other hand, among the points where the cogging torque becomes zero, the cogging torque rotates the rotor 74 counterclockwise when the rotor 74 is moved in the counterclockwise direction (θ is the positive direction) ( The cogging torque acts in the direction in which the rotor 74 is rotated in the clockwise direction (− direction) when the rotor 74 is moved in the clockwise direction (θ is in the − direction). This corresponds to an “unstable point” where torque is generated to rotate the rotor 74 in any of the circumferential directions.

  In the single-phase motor 70b of this embodiment, the number of salient poles 720 around which the stator coil 73 is wound in the stator core 72 is twice the number of magnetic poles of the rotor magnet 75 (the sum of the number of S poles and the number of N poles). . In this embodiment, the number of magnetic poles of the rotor magnet 75 is 4, and the number of salient poles 720 is 8. The salient poles 720 are provided at equiangular intervals in the circumferential direction. The stator coil 73 has a configuration in which one coil wire 730 is wound around a plurality of salient poles 720 as indicated by an arrow C in FIG. 8B, and two end portions 731 and 732 are drawn out. It is.

  In addition, the coil wire 730 is wound in the same direction in the pair of two salient poles 720 adjacent to each other, and is wound in the pair of two salient poles 720 adjacent in the clockwise direction CW to the pair of salient poles 720. The direction is reversed. Further, in the two salient poles 720 facing one pole of the rotor magnet 75, the winding direction of the coil wire 730 is reversed. For this reason, when the coil wire 730 is energized, the two salient poles 720 facing one pole of the rotor magnet 75 are opposite to each other.

  As shown in FIG. 9A, when the rotor 74 is rotated counterclockwise CCW, a current indicated by an arrow Ia is applied to the stator coil 73. As a result, a counterclockwise CCW attractive force indicated by a solid arrow Fa acts on one pole of the rotor magnet 75 between one of the two salient poles 720, while between the other, The counterclockwise CCW repulsive force shown by the dotted arrow Fb acts. Accordingly, the rotor 74 rotates counterclockwise CCW and rotates the optical module 100 counterclockwise CCW.

  Further, as shown in FIG. 9B, when the rotor 74 is rotated clockwise CW, a current indicated by an arrow Ib is applied to the stator coil 73. As a result, an attractive force of clockwise CW indicated by a solid arrow Fc acts on one pole of the rotor magnet 75 between one of the two salient poles 720, while a dotted line appears between the other pole. The repulsive force of the clockwise CW indicated by the arrow Fd of FIG. Accordingly, the rotor 74 rotates clockwise CW and rotates the optical module 100 clockwise CW.

  The single-phase motor 70 b configured as described above has two adjacent cogging torque peak points at which the pole center of the rotor magnet 75 coincides with the magnetic center of the stator coil 73 when performing the rolling correction of the optical module 100. The rotor 74 is rotated within an angle range sandwiched between two cogging torque peak points, and the optical module 100 is reciprocated. In this embodiment, since the number of magnetic poles of the rotor magnet 75 is 4 and the number of salient poles 720 is 8, the single-phase motor 70b has gogging torque having a 45 ° cycle as shown in FIG. . For this reason, the position where the gogging torque becomes maximum appears at a cycle of 22.5 °. However, in order to perform rolling correction of the optical module 100, the optical module 100 is practically about 12 ° (± 6 °). Therefore, according to the single-phase motor 70b of this embodiment, when performing the rolling correction of the optical module 100, the rotor 74 is rotated within an angle range sandwiched between two adjacent cogging torque peak points, and the optical module 100 is It can be reciprocated.

(Configuration of connecting member 80)
FIG. 11 is an explanatory view of the stopper mechanism 110 of the optical unit 300 to which the present invention is applied, and is an XY cross-sectional view when the optical unit 300 is cut at a position passing through the connecting member 80.

  In the present embodiment, the optical module 100 is connected to the end on the other side −Z in the Z-axis direction of the rotating shaft 745 of the motor 70 a via the connecting member 80. In this embodiment, the connection member 80 is a rectangular plate portion 81 that supports the optical module 100, and a plate shape that is bent from both ends of the plate portion 81 in the X-axis direction toward the other side −Z in the Z-axis direction. Positioning projections 82 and 83, and a pair of positioning projections 84 bent toward the other side -Z in the Z-axis direction at the other end -Y end in the Y-axis direction of the plate portion 81. The optical module 100 is fixed to the plate portion 81 in a state where the optical module 100 is positioned by the positioning convex portions 82, 83, 84. Therefore, the optical module 100 rotates integrally with the rotation shaft 745 (rotor 74) of the motor 70a. The connecting member 80 has a cylindrical portion (not shown) protruding from the plate portion 81 to one side in the Z-axis direction, and the rotating shaft 745 is screwed or the like with the rotating shaft 745 fitted into the cylindrical portion. Fixed to.

  Here, the connecting member 80 includes a stopper projection 86 that protrudes further from one end + X in the X axis direction of the plate portion 81 to one side + X in the X axis direction, and the other of the plate portion 81 in the X axis direction. And a stopper projection 87 protruding from the end of the side -X to the other side -X in the X-axis direction.

  As shown in FIG. 11, the stopper convex portions 86 and 87 both have their tip portions 860 and 870 directed to the other side −Y in the Y-axis direction. In addition, on the inner surface of the first case member 320 of the unit case 310, a receiving portion 326 facing the tip end portion 860 of the stopper convex portion 86 on the other side -Y in the Y-axis direction, and a stopper convex portion 87 A receiving portion 327 that is opposed to the tip portion 870 on the other side -Y in the Y-axis direction is formed. Therefore, when the connecting member 80, the optical module 100, and the rotation shaft 745 are rotated in the clockwise CW direction around the optical axis L, the tip end portion 860 of the stopper convex portion 86 abuts on the receiving portion 326, and The movable range in the clockwise CW direction is restricted. Further, when the connecting member 80, the optical module 100, and the rotation shaft 745 rotate counterclockwise CCW around the optical axis L, the tip end portion 870 of the stopper convex portion 87 abuts on the receiving portion 327, and the optical module 100. The movable range in the counterclockwise CCW direction is restricted.

  In this way, in this embodiment, the stopper mechanism that restricts the movable range around the optical axis L of the optical module 100 by the stopper convex portions 86 and 87 of the connecting member 80 and the receiving portions 326 and 327 of the unit case 310. 110, and the movable range of the optical module 100 restricted by the stopper mechanism 110 is wider than the rolling correction range and the angular range sandwiched between adjacent cogging torque peak points as shown in FIG. Narrower. For this reason, it is possible to prevent the optical module 100 from being excessively rotated by the torque applied from the outside. In the stopper mechanism 110, the stopper convex portions 86 and 87 formed on the connecting member 80 abut against the receiving portions 326 and 327 of the unit case 310 to restrict the movable range of the optical module 100. Therefore, the stopper mechanism 110 can be configured without adding a member.

(Configuration of circuit board 76)
3, 4, and 8 again, the support member 77 does not have a side plate portion on the other side −Y in the Y-axis direction, and at the end portion on the other side −Y in the Y-axis direction of the bottom plate portion 771. And a pair of connecting plate portions 775 which are bent from one end on both sides in the X-axis direction toward one side + Z in the Z-axis direction. Therefore, the support member 77 is in an open state on the other side -Y in the Y-axis direction of the body portion 743 of the rotor case 740. Here, a circuit board 76 is fixed to the other side −Y of the support member 77 in the Y-axis direction by a connecting plate part 775, and the circuit board 76 includes an end part and a side plate part of the bottom plate part 771 of the support member 77. 772 and 773 are in contact with the end portions. In this state, on the other side -Y in the Y-axis direction, the circuit board 76 faces the body portion 743 of the rotor case 740 on the outer side in the radial direction, and constitutes a protective plate for the motor 70a. Accordingly, the single-phase motor 70 is provided by the circuit board 76.
b can be protected. Further, since the support member 77 does not have a side plate portion on the other side −Y in the Y-axis direction, the end portions 731 and 732 of the stator coil 73 can be easily attached to the circuit board 76 on the other side −Y in the Y-axis direction. Can be connected to.

(Configuration of angular position detection sensor 760, etc.)
FIG. 12 is an explanatory diagram of an angular position detection sensor 760 configured in an optical unit 300 suitable for the present invention. FIGS. 12A, 12B, and 12C show the output characteristics of the angular position detection sensor 760. FIG. FIG. 2 is an explanatory diagram illustrating the magnetic flux density on the inner peripheral side of the rotor magnet 75 and the magnetic flux density on the outer peripheral side of the rotor magnet 75.

  In the circuit board 76, an angular position detection sensor 760 that detects the angular position of the rotor 74 (optical module 100) is mounted on the board surface 76 a facing the body 743 side of the rotor case 740. The angular position detection sensor 760 is a magnetic detection element 760a and faces the rotor magnet 75 on the side opposite to the stator core 72. In this embodiment, the magnetic detection element 760a is the Hall element 760b, and when the rolling correction drive mechanism 70 is at rest, that is, when no vibration in the rolling direction is detected, the magnetic pole boundary between the N pole and the S pole of the rotor magnet 75 Opposite to 75a.

  As shown in FIG. 8A, the rotor 74 has a body portion 743 (back yoke) of the rotor case 740 on the radially outer side of the rotor magnet 75, but when viewed from the radially outer side, the rotor magnet 75. Is exposed from one end + Z end in the Z-axis direction of the body 743, and the magnetic detection element 760a (Hall element 760b) is opposed to the exposed portion 750 on the radially outer side. Further, the magnetic detection element 760a (Hall element 760b) is disposed on the radially outer side from the radially outer surface of the body 743, and is disposed at a distance greater than the thickness of the body 743 from the rotor magnet 75. Has been. The dimension d in the Z-axis direction of the exposed portion 750 of the rotor magnet 75 is equal to or less than the thickness t of the rotor magnet 75.

  Thus, in this embodiment, the magnetic detection element 760a is opposed to the rotor magnet 75 with a sufficient gap on the side opposite to the magnetized surface 751 of the rotor magnet 75. For this reason, as shown in FIG. 12A, when the rolling correction drive mechanism 70 is at rest, the magnetic detection element 760a faces the magnetic pole boundary line 75a between the N pole and the S pole of the rotor magnet 75. Therefore, although the output is 0V, when the rotating shaft 745 rotates and the rotor magnet 75 moves in the circumferential direction, the output from the magnetic detection element 760a changes substantially linearly with respect to the angular position of the rotor magnet 75. To do.

  That is, as shown in FIG. 12B, since the inner peripheral surface of the rotor magnet 75 is a magnetized surface 751, the magnetic flux density is complicated in the circumferential direction on the inner side in the radial direction, and is steep at the switching position of the magnetic pole. To change. On the other hand, as shown in FIG. 12C, the magnetic flux density at a position 1 mm away from the rotor magnet 75 on the outer side in the radial direction of the rotor magnet 75 (the side opposite to the magnetized surface 751) is circumferential. There is a region where the magnetic flux density changes substantially linearly in the circumferential direction. Therefore, as in the present embodiment, if the magnetic detection element 760a faces the rotor magnet 75 with a sufficient gap on the side opposite to the magnetized surface 751 of the rotor magnet 75, FIG. The output as shown in can be obtained.

  In this embodiment, since the magnetic detection element 760a is the Hall element 760b, the polarity of the output is reversed by the movement of the rotor magnet 75. For this reason, the angular position of the rotor magnet 75 can be detected.

(Rolling correction)
In the optical module 100, when the optical apparatus 1000 shown in FIG. 1 is shaken in the rolling direction, the shake is detected by the gyroscope 781, and the rolling correction driving mechanism 70 is controlled based on the detection result. That is, as a result of supplying a drive current that cancels the shake detected by the gyroscope 781 to the stator coil 73, the rotor 74 is driven around the optical axis L in the direction opposite to the shake. Therefore, the optical module 100 rotates around the optical axis L in the direction opposite to the shake. At that time, the angular position detection sensor 760 (magnetic detection element 760a, Hall element 760b) detects the angular position of the rotor 74, and the rolling correction drive mechanism 70 is controlled based on the detection result. Therefore, the rotor 74 and the optical module 100 are returned to the reference position, and the shake in the rolling direction is corrected.

(Main effects of this form)
As described above, in the optical unit 300 of this embodiment, the movable body 10 that holds the optical element such as the lens 1a and the swing drive mechanism 50 are provided in the optical module 100, and the optical module 100 performs pitching correction and yawing correction. The rolling correction is performed by rotating the optical module 100 around the optical axis L by the rolling correction driving mechanism 70. For this reason, since the rolling correction is performed independently of the pitching correction and the yawing correction, the shake correction can be easily controlled. If no rolling correction is required, the optical module 100 can be used alone.

  The rolling correction drive mechanism 70 uses a single-phase motor 70b (motor 70a). Since the single-phase motor uses the attractive force and the repulsive force of the rotor magnet 75, the Lorentz force is used. A larger torque can be obtained as compared with the case.

  In particular, in this embodiment, since the number of salient poles 720 of the stator core 72 is twice the number of magnetic poles of the rotor magnet 75, the number of windings of the stator coil 73 around the salient poles 720 is increased as the number of salient poles 720 increases. Can be reduced. Accordingly, since the volume occupied by the stator coil 73 is small, the single-phase motor 70b can be reduced in size in the optical axis L direction. Therefore, the size of the optical unit 300 in the direction of the optical axis L can be reduced.

  Further, since the single-phase motor 70b rotates the optical module 100 in a reciprocating manner within an angle range sandwiched between two adjacent cogging torque peak points, the single-phase motor 70b applies a torque exceeding the ripple of the cogging torque to the optical module. There is no need to add to 100. Therefore, power saving of the single phase motor 70b can be achieved. In addition, since the cogging torque applied to the optical module 100 can be used as a magnetic spring for returning the optical module 100 to the reference position around the optical axis L, it is not necessary to provide a mechanical spring separately.

  In this embodiment, the angle at which the angular position around the optical axis L of the optical module 100 is detected by the magnetic detection element 760a facing the rotor magnet 75 of the single-phase motor 70b (motor 70a) used in the rolling correction drive mechanism 70. A position detection sensor 760 is configured. For this reason, the angular position around the optical axis L of the optical module 100 can be detected with a simple configuration. Even in that case, the magnetic detection element 760a faces the rotor magnet 75 on the side opposite to the stator core 72, so that the magnetic detection element 760a is not affected by the stator core 72, and the optical axis L of the optical module 100 is not affected. The surrounding angular position can be detected. Further, the magnetic detection element 760a is opposed to the surface magnetized in the rotor magnet 75 (the surface facing the stator core 72), and is opposed to the surface magnetized in the rotor magnet 75. On the opposite side, the distribution of magnetic flux density in the circumferential direction continuously and gently changes. For this reason, the linearity of the output from the magnetic detection element 760a is high.

  In this embodiment, since the single-phase motor 70b is an outer rotor type, the circumferential dimension of the rotor magnet 75 is long. Therefore, the resolution of the detection result of the magnetic detection element 760a is high.

In the single-phase motor 70b, the body 743 (back yoke) of the rotor case 740 is provided on the outer side in the radial direction of the rotor magnet 75. However, the magnetic detection element 760a has the rotor magnet 75 when viewed from the outer side in the radial direction. Is opposed to the exposed portion 750 from the body 743. For this reason, even when the back yoke (body portion 743) is disposed on the outer side in the radial direction of the rotor magnet 75, the back yoke hardly affects the detection result of the magnetic detection element 760a. Even in this case, since the dimension of the exposed portion 750 is equal to or less than the thickness of the rotor magnet 75, a decrease in strength of the exposed portion 750 of the rotor magnet 75 can be suppressed.

  Further, since the magnetic detection element 760a is disposed on the radially outer side from the radially outer surface of the body portion 743 (back yoke), the magnetic detection element 760a and the rotor magnet 75 are sufficiently separated from each other. Therefore, since the distribution of the magnetic flux density in the circumferential direction changes continuously and gently, the output linearity from the magnetic detection element 760a is high.

  Further, since the magnetic detection element 760a is mounted on the circuit board 76 that supplies power to the stator coil 73, the magnetic detection element 760a can be arranged with a simple configuration.

  Further, since the magnetic detection element 760a is the Hall element 760b, it can be detected in which direction of the circumferential direction the rotor magnet 75 is moving based on the output from the Hall element 760b.

[Other embodiments]
FIGS. 13A and 13B are explanatory views showing a modification of the rolling correction drive mechanism 70 of the optical unit 300 to which the present invention is applied. FIGS. 13A and 13B are an explanatory view of the modification 1 and a modification. FIG.

  8B and 9, all of the plurality of salient poles 720 are formed at equal angular intervals in the circumferential direction. However, as shown in FIG. 13A, the same rotor magnet 75 is used. The interval between the two salient poles 720 facing the magnetic poles may be different from the interval between the two salient poles 720 facing the other magnetic poles of the rotor magnet 75.

  8B and 9, the stator coil 73 is wound with a one-to-one correspondence with the plurality of salient poles 720. As shown in FIG. 13B, Of the salient poles 720 adjacent in the circumferential direction, a configuration in which the common stator coil 73 is wound so as to straddle two salient poles 720 around which the stator coil 73 is wound in the same direction may be employed.

  In the above-described embodiment, the outer rotor type motor 70a whose rotor magnet is opposed to the salient pole 720 on the radially outer side is used for the rolling correction drive mechanism 70. Thus, an inner rotor type motor that faces the rotor magnet, or a face-facing type motor that faces the rotor magnet by the Z-axis method with respect to the salient pole 720 may be used for the rolling correction drive mechanism 70.

  Further, in the above embodiment, the gyroscope 781 for detecting the shake in the rolling direction and the gyroscope 187 for detecting the shake in the pitch direction and the yawing direction are separately arranged. However, the shake in the pitch direction and the yawing direction is detected. A sensor that can sense the shaking in the rolling direction may be used for the gyroscope 187.

[Usage example of optical unit 300]
The optical unit 300 to which the present invention is applied may be applied to shake correction of an optical device that emits light, such as a portable or vehicle-mounted projection display device or a direct-view display device. Further, it may be used for observation without using an auxiliary fixing device such as a tripod for observation at a high magnification such as an astronomical telescope system or a binoculars system. In addition, by using a sniper rifle or a gun barrel such as a tank, the posture can be stabilized against vibration at the time of triggering, so that the accuracy of hitting can be improved.

1 .. Imaging module, 10 .. Movable body, 16 .. Imaging circuit module, 1 a .. Lens (optical element), 20 .. Support body, 21 .. Module case, 30 .. Gimbal mechanism, 50. Oscillation drive mechanism, 70 ... rolling correction drive mechanism, 70a ... motor, 70b ... single phase motor, 71 ... stator, 72 ... stator core, 73 ... stator coil, 74 ... rotor, 75 ... Rotor magnet, 75a, magnetic pole boundary line, 76, circuit board, 77, support member, 79, bearing holder, 80, connecting member, 86, 87, convex portion for stopper, 100, optical module, 110..Stopper mechanism, 300..Optical unit, 310..Unit case, 320..First case member, 326, 327..Receiving portion, 330..Second case member, 70. 702 ·· Bearing, 720 · · Multiple salient poles, 730 · · Coil wire, 740 · · Rotor case, 743 · · Body (back yoke), 745 · · Rotating shaft, 750 · · Exposed portion, 751 · · .. Magnetized surface, 760 .. Angular position detection sensor, 760 a .. Magnetic detection element, 760 b .. Hall element, 771 .. Bottom plate part, 772 to 774 .. Side plate part, 781 .. Gyroscope, 1000. Equipment, L ・ ・ Optical axis, L1 ・ ・ First axis, L2 ・ ・ Second axis

Claims (9)

A movable body that holds the optical element, a support that supports the movable body so as to be swingable around two axes orthogonal to the optical axis of the optical element, and the movable body that is supported by the support 2 An optical module having a rocking drive mechanism that reciprocally rocks around one axis;
A rolling correction drive mechanism for rotating the optical module around the optical axis;
An angular position detection sensor for detecting an angular position around the optical axis of the optical module;
Have
The rolling correction drive mechanism includes a stator core having a plurality of salient poles in the circumferential direction, a stator coil wound around the salient poles, and radially opposed to the salient poles and radially opposed to the salient poles. And a motor having a rotor magnet in which the surface to be magnetized is an S-pole and an N-pole alternately magnetized in the circumferential direction,
The optical unit with a shake correction function, wherein the angular position detection sensor is a magnetic detection element facing the rotor magnet on the side opposite to the stator core.   The optical unit with a shake correction function according to claim 1, wherein the rotor magnet is opposed to the salient pole on a radially outer side. The rolling correction drive mechanism includes a back yoke on the radially outer side of the rotor magnet,
3. The shake correction function according to claim 2, wherein the magnetic detection element is opposed to a portion where the rotor magnet is exposed from an end portion of the back yoke when viewed from a radially outer side. With optical unit.   The optical unit with a shake correction function according to claim 3, wherein the magnetic detection element is disposed on a radially outer side than a radially outer surface of the back yoke.   5. The runout according to claim 3, wherein a size of a portion of the rotor magnet exposed from an end portion of the back yoke when viewed from a radially outer side is equal to or less than a thickness of the rotor magnet. Optical unit with correction function.   6. The magnetic detection element according to claim 1, wherein the magnetic detection element faces a magnetic pole boundary line between the north pole and the south pole of the rotor magnet when the rolling correction driving mechanism is stopped. An optical unit with a shake correction function according to one item. The motor includes a bearing that rotatably supports the rotor magnet, a bearing holder that holds the bearing, a support member that holds the bearing holder, and a circuit board that is fixed to the support member.
The optical unit with a shake correction function according to claim 1, wherein the magnetic detection element is mounted on the circuit board. The support member has a bottom plate portion that holds the bearing holder on the opposite output side of the motor, and a side plate portion that is bent from the bottom plate portion toward the output side,
The optical unit with a shake correction function according to claim 7, wherein the circuit board is in contact with an end portion of the side plate portion and an end portion of the bottom plate portion.   The optical unit with a shake correction function according to claim 1, wherein the magnetic detection element is a Hall element.

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