WO2014188656A1 - Unité de caméra - Google Patents

Unité de caméra Download PDF

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Publication number
WO2014188656A1
WO2014188656A1 PCT/JP2014/002156 JP2014002156W WO2014188656A1 WO 2014188656 A1 WO2014188656 A1 WO 2014188656A1 JP 2014002156 W JP2014002156 W JP 2014002156W WO 2014188656 A1 WO2014188656 A1 WO 2014188656A1
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WO
WIPO (PCT)
Prior art keywords
unit
yaw
pitch
axis
magnet
Prior art date
Application number
PCT/JP2014/002156
Other languages
English (en)
Japanese (ja)
Inventor
宮本　誠
力弥 江島
浩治 渡部
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2015518060A priority Critical patent/JPWO2014188656A1/ja
Publication of WO2014188656A1 publication Critical patent/WO2014188656A1/fr

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils

Definitions

  • This disclosure relates to the structure of a camera unit having an image blur correction mechanism.
  • Patent Document 1 discloses a camera unit capable of driving a lens barrel.
  • the camera unit includes an actuator on the rear end surface of the lens barrel.
  • the camera unit can drive the lens barrel in the pitching direction and the yawing direction by an actuator.
  • a camera unit includes a first movable part that holds a camera module, a second movable part that rotatably holds the first movable part on a first axis, and a direction in which the second movable part is different from the first axis.
  • An outer frame that is rotatably held on the second shaft, a first drive unit, and a second drive unit.
  • the first drive unit has a first magnet provided on one of the first movable unit and the second movable unit and a first coil provided on the other, and is opposite to the subject with respect to the camera module.
  • the first movable part is arranged around the first axis with respect to the second movable part by the interaction of the first magnet and the first coil.
  • the second drive unit has a second magnet provided on one of the second movable part and the outer frame and a second coil provided on the other, and is on the opposite side of the subject from the camera module. It arrange
  • the inner region defined by the outer periphery of the first magnet or the first coil arranged in the second movable part is the second movable part. It overlaps with the inner region defined by the outer circumference of the second magnet or the second coil to be arranged.
  • FIG. 1 is a schematic diagram illustrating a basic structure of a camera unit according to the first embodiment.
  • FIG. 2 is an external perspective view of the camera unit according to the first embodiment.
  • FIG. 3 is an exploded perspective view of the camera unit according to the first embodiment.
  • 4A is an external perspective view of the pitch unit according to Embodiment 1.
  • FIG. 4B is an arrow view of the pitch unit in FIG. 4A viewed from the A direction.
  • FIG. 4C is an arrow view of the pitch unit in FIG. 4A viewed from the B direction.
  • FIG. 5A is an external perspective view of the yaw unit in the first embodiment.
  • FIG. 5B is an arrow view of the yaw unit in FIG. 5A viewed from the C direction.
  • FIG. 5C is an arrow view of the yaw unit in FIG. 5A viewed from the D direction.
  • FIG. 6 is a perspective view of the drive unit in the first embodiment.
  • FIG. 7 is an exploded perspective view of the drive unit in the first embodiment.
  • 8A is a cross-sectional view of the drive unit in FIG. 3 on the YZ plane.
  • 8B is an arrow view seen from the F direction of the drive unit in FIG. 6.
  • FIG. 9 is a perspective view of sensor FPC in the first embodiment.
  • FIG. 10 is a development view of the sensor FPC in the first embodiment.
  • FIG. 11A is a cross-sectional view taken along the line XI-XI of the pitch unit during rotation and its peripheral portion in FIG. 5C.
  • FIG. 11B is a cross-sectional view taken along the line XI-XI of the pitch unit and its peripheral portion during rotation in FIG. 5C.
  • FIG. 11C is a cross-sectional view taken along the line XI-XI of the pitch unit and its periphery during rotation in FIG. 5C.
  • 12A is an XII-XII cross-sectional view of the yaw unit and its periphery during rotation in FIG. 5B.
  • 12B is an XII-XII cross-sectional view of the yaw unit during rotation and its peripheral portion in FIG. 5B.
  • 12C is an XII-XII cross-sectional view of the yaw unit and its periphery during rotation in FIG. 5B.
  • FIG. 13 is an external perspective view of the yaw unit and the peripheral portion in the second embodiment.
  • 14A is an arrow view of the yaw unit in FIG. 13 viewed from the I direction.
  • 14B is a cross-sectional view of the yaw unit taken along the line XIV-XIV in FIG. 14A.
  • FIG. 14C is an enlarged view of the XIV portion in FIG. 14B.
  • FIG. 15A is a schematic diagram showing a change in the state of the position detection unit accompanying the rotation of the yaw unit in the second embodiment.
  • FIG. 15B is a schematic diagram illustrating a change in the state of the position detection unit accompanying the rotation of the yaw unit in the second embodiment.
  • FIG. 15C is a schematic diagram illustrating a change in the state of the position detection unit accompanying the rotation of the yaw unit in the second embodiment.
  • FIG. 16A is an external perspective view of a camera unit according to Embodiment 3.
  • FIG. 16B is a perspective view of the rotation unit and its periphery in Embodiment 3.
  • FIG. 17 is an exploded perspective view of the pitch unit and the drive unit in the third embodiment.
  • FIG. 18 is an exploded perspective view of the camera unit according to the third embodiment.
  • FIG. 19A is a schematic diagram for explaining the rotation operation of the pitch unit in the third embodiment.
  • FIG. 19B is a schematic diagram for explaining the rotation operation of the pitch unit in the third embodiment.
  • FIG. 19C is a schematic diagram for explaining the rotation operation of the pitch unit in the third embodiment.
  • FIG. 20A is a schematic diagram showing a change in the state of the pitch driving unit in the third embodiment.
  • FIG. 20B is a schematic diagram illustrating a change in the state of the pitch driving unit in the third embodiment.
  • FIG. 20C is a schematic diagram illustrating a change in the state of the pitch driving unit according to the third embodiment.
  • FIG. 21A is a schematic diagram illustrating a change in the state of the rotation driving unit according to the third embodiment.
  • FIG. 21B is a schematic diagram illustrating a change in the state of the rotation driving unit in the third embodiment.
  • FIG. 21C is a schematic diagram illustrating a change in state of the rotation driving unit in the third embodiment.
  • FIG. 22 is a perspective view of a sensor FPC according to another embodiment.
  • FIG. 23 is a development view of a sensor FPC according to another embodiment.
  • FIG. 24A is a perspective view of a pitch magnet in another embodiment.
  • FIG. 24B is a perspective view of a pitch magnet in another embodiment.
  • FIG. 25A is a perspective view of a yaw magnet in another embodiment.
  • FIG. 25B is a perspective view of a yaw magnet in another embodiment.
  • FIG. 1 is a schematic diagram showing a basic structure of the camera unit 500.
  • the camera unit 500 includes a pitch unit 100, a yaw unit 200, an outer frame 400, and a drive unit 300.
  • the driving unit 300 includes a pitch driving unit 351 and a yaw driving unit 352.
  • the pitch unit 100 holds the camera module 104.
  • the yaw unit 200 holds the pitch unit 100 so as to be rotatable on the pitch rotation shaft 106.
  • the outer frame 400 holds the yaw unit 200 rotatably on the yaw rotation shafts 208 and 209.
  • the directions of the yaw rotation axes 208 and 209 are perpendicular to the direction of the pitch rotation axis 106.
  • the pitch driving unit 351 includes a pitch magnet unit 330 disposed in the pitch unit 100 and a pitch coil 311 disposed in the yaw unit 200.
  • the pitch driving unit 351 is disposed on the opposite side of the subject from the camera module 104.
  • the pitch driving unit 351 rotates the pitch unit 100 around the pitch rotation axis 106 with respect to the yaw unit 200 by the interaction between the pitch magnet unit 330 and the pitch coil 311.
  • the yaw driving unit 352 includes a yaw magnet unit 320 disposed on the outer frame 400 and a yaw coil 314 disposed on the yaw unit 200.
  • the yaw drive unit 352 is disposed on the opposite side of the subject from the camera module 104.
  • the yaw driving unit 352 rotates the yaw unit 200 around the yaw rotation axes 208 and 209 with respect to the outer frame 400 by the interaction of the yaw magnet unit 320 and the yaw coil 314.
  • the inner region defined by the outer periphery of the pitch coil 311 disposed in the yaw unit 200 is the yaw unit 200. It overlaps with the inner region defined by the outer periphery of the yaw coil 314 arranged at the center.
  • FIG. 2 is an external perspective view of the camera unit 500.
  • the outer frame 400 of the camera unit 500 includes an outer frame (upper) 401, an outer frame (lower) 402, a front frame 403, and a rear frame 404.
  • the camera unit 500 includes a camera module 104.
  • a front frame 403 is disposed on the subject side with respect to the camera module 104.
  • An opening 403 a is provided at a position facing the camera module 104 in the front frame 403.
  • a rear frame 404 is disposed on the opposite side of the camera module 104 from the subject.
  • a sensor FPC Flexible Printed Circuit: Flexible Printed Circuit Board
  • the coil FPC 340 electrically connects a drive unit 300 (described later) and a drive control circuit (not shown).
  • FIG. 3 is an exploded perspective view of the camera unit 500.
  • 4A is an external perspective view of the pitch unit 100.
  • FIG. 4B is an arrow view of the pitch unit 100 as viewed from the direction of the pitch rotation shaft 106 (direction A shown in FIG. 4A).
  • 4C is an arrow view of the pitch unit 100 as viewed from a direction perpendicular to both the pitch rotation axis 106 and the optical axis of the camera module 104 (direction B shown in FIG. 4A).
  • Each configuration will be described below.
  • the pitch unit 100 includes a pitch frame 101, a camera module 104, and a pitch rotation shaft 106. Both the camera module 104 and the pitch rotation shaft 106 are held by the pitch frame 101.
  • the pitch rotation axis 106 is provided so as to penetrate the pitch frame 101 in a direction perpendicular to the optical axis of the camera module 104. Both end portions of the pitch rotation shaft 106 protrude from the pitch frame 101.
  • a virtual axis that coincides with the pitch rotation axis 106 is defined as an axis X. The positional relationship of the axis X with respect to the pitch unit 100 is fixed.
  • Bearings 102 and 103 are fitted in both ends of the pitch rotation shaft 106.
  • the pitch unit 100 is supported by the yaw unit 200 so as to be rotatable around the axis X via bearings 102 and 103.
  • the rotation of the pitch unit 100 around the axis X may be expressed as the pitch unit 100 rotates in the pitch direction or simply the pitch unit 100 rotates.
  • the camera module 104 includes an optical system (not shown) and an image sensor (not shown).
  • the optical system forms light from the subject incident through the opening 403a and the opening 207a (described later) on the image sensor as a subject image.
  • the imaging sensor captures a subject image and generates image data.
  • the pitch magnet unit 330 is fixed to the pitch frame 101. Details of the pitch magnet unit 330 will be described later.
  • each part of the pitch unit 100 are set as appropriate, so that the center of gravity position of the combined member of the pitch magnet unit 330 and the pitch unit 100 is configured to be on the axis X.
  • the center of gravity position of the pitch unit 100 including the pitch magnet unit 330 can be set by adjusting the distance from the camera module 104 or the pitch rotation axis 106 of the pitch magnet unit 330.
  • the pitch unit 100 is an example of a first movable part.
  • the axis X is an example of a first axis.
  • FIG. 5A is an external perspective view of the yaw unit 200.
  • FIG. 5B is an arrow view of the yaw unit 200 viewed from the direction of the axis X (the C direction shown in FIG. 5A).
  • FIG. 5C is an arrow view of the yaw unit 200 viewed from the direction of the axis Z (the direction D shown in FIG. 5A).
  • the yaw unit 200 includes a yaw frame (upper) 201, a yaw frame (lower) 202, and a balance plate 207.
  • the yaw frame (upper) 201 includes a yaw rotation shaft 208.
  • the yaw frame (lower) 202 includes a yaw rotation shaft 209. That is, the yaw unit 200 includes yaw rotation shafts 208 and 209.
  • the yaw rotation shafts 208 and 209 are provided such that the directions of the axes are perpendicular to the pitch rotation shaft 106.
  • a virtual axis that coincides with the yaw rotation axes 208 and 209 is defined as an axis Z.
  • the axis X and the axis Z are perpendicular to each other.
  • An imaginary axis that is perpendicular to both the axis X and the axis Z is an axis Y.
  • the positional relationship between the axes X, Y, and Z is fixed with respect to the yaw unit 200.
  • the positional relationship of the axis Z with respect to the outer frame 400 is fixed.
  • the yaw frame (upper) 201 and the yaw frame (lower) 202 constitute a casing of the yaw unit 200 by being combined in the direction of the axis Z.
  • the bearings 102 and 103 are fitted to the pitch rotation shaft 106 of the pitch unit 100.
  • the yaw frame (upper) 201 and the yaw frame (lower) 202 sandwich and hold the bearings 102 and 103 in the direction of the axis Z.
  • the side plates 205 and 206 are fastened and fixed to the yaw frame (upper) 201 and the yaw frame (lower) 202 with screws so as to further restrict the movement of the bearings 102 and 103 in the direction of the axis X.
  • the yaw unit 200 includes the pitch unit 100 and supports the pitch unit 100 so as to be rotatable about the axis X on the pitch rotation shaft 106.
  • the yaw rotation shaft 208 is disposed on the yaw frame (upper) 201 so as to protrude from the housing.
  • the yaw rotation shaft 209 is disposed on the yaw frame (lower) 202 so as to protrude from the housing.
  • a bearing 203 is fitted on the yaw rotation shaft 208.
  • a bearing 204 is fitted on the yaw rotation shaft 209.
  • the yaw unit 200 is supported by the outer frame 400 so as to be rotatable around the axis Z on the yaw rotation shafts 208 and 209.
  • the rotation of the yaw unit 200 around the axis Z may be expressed as the yaw unit 200 rotating in the yaw direction or simply the yaw unit 200 rotating.
  • the optical axis of the camera module 104 coincides with the axis Y when the pitch unit 100 is at the center position within the rotatable range. Note that when the pitch unit 100 is at the above-described center position and the yaw unit 200 is at a center position within a rotatable range, the position of the camera module 104 may be described as the center position.
  • the balance plate 207 engages with the yaw frame (upper) 201 and the yaw frame (lower) 202 and is fastened and fixed with screws.
  • An opening 207 a is provided at a position facing the camera module 104 in the balance plate 207. Therefore, the camera module 104 can image a subject through the opening 207a.
  • the optical axis of the camera module 104 passes through the center of the opening 207a and the center of the opening 403a of the outer frame 400.
  • the coil unit 310 is fixed to the yaw unit 200, more specifically, to the yaw frame (upper) 201. Details of the coil unit 310 will be described later.
  • the center of gravity of the member including the yaw unit 200, the pitch unit 100, the pitch magnet unit 330, and the coil unit 310 is positioned on the axis Z. Configured to do.
  • the position of the center of gravity of the yaw unit 200 can be set by changing the weight of the balance plate 207 or changing the weight of the balance plate 207 from the yaw rotation axes 208 and 209. It is.
  • the yaw unit 200 is an example of a second movable part.
  • the axis Z is an example of a second axis.
  • the axis Y is an example of a third axis.
  • FIG. 6 is a perspective view of the drive unit 300.
  • FIG. 7 is an exploded perspective view of the drive unit 300.
  • 8A is a cross-sectional view of the driving unit 300 in FIG. 3 on the YZ plane.
  • FIG. 8B is an arrow view of the drive unit 300 in FIG. 6 viewed from the F direction.
  • the drive part 300 is provided with the pitch magnet unit 330, the yaw magnet unit 320, and the coil unit 310 from the viewpoint of a physical unit.
  • the pitch magnet unit 330 is fixed to the pitch unit 100.
  • the yaw magnet unit 320 is fixed to the outer frame 400.
  • the coil unit 310 is fixed to the yaw unit 200.
  • the coil unit 310 includes a pitch coil 311, a pitch opposing yoke 312, a yaw opposing yoke 313, a yaw coil 314, and Hall elements 341 and 342.
  • the driving unit 300 includes a pitch driving unit 351 and a yaw driving unit 352 from a functional viewpoint.
  • the pitch driving unit 351 includes a pitch coil 311, a pitch opposing yoke 312, and a pitch magnet unit 330.
  • the yaw driving unit 352 includes a yaw coil 314, a yaw counter yoke 313, and a yaw magnet unit 320.
  • the pitch drive unit 351 is disposed on the opposite side of the subject from the camera module 104.
  • the pitch magnet unit 330 and the pitch coil 311 are disposed so as to face each other along the radial direction (radial direction) with respect to the axis X that is the rotation center of the pitch unit 100.
  • the pitch drive unit 351 rotates the pitch unit 100 around the pitch rotation axis 106 (around the axis X) with respect to the yaw unit 200 by the interaction between the pitch magnet unit 330 and the pitch coil 311.
  • the yaw drive unit 352 is disposed on the opposite side of the subject from the camera module 104.
  • the yaw magnet unit 320 and the yaw coil 314 are disposed so as to face each other along the radial direction (radial direction) with respect to the axis Z that is the rotation center of the yaw unit 200.
  • the yaw driving unit 352 rotates the yaw unit 200 around the yaw rotation axes 208 and 209 (around the axis Z) with respect to the outer frame 400 by the interaction between the yaw magnet unit 320 and the yaw coil 314.
  • the inner region defined by the outer periphery of the pitch coil 311 disposed in the yaw unit 200 is the inner region defined by the outer periphery of the yaw coil 314 disposed in the yaw unit 200. overlapping.
  • the pitch magnet unit 330 is an example of a first magnet.
  • the pitch coil 311 is an example of a first coil.
  • the pitch drive unit 351 is an example of a first drive unit.
  • the yaw magnet unit 320 is an example of a second magnet.
  • the yaw coil 314 is an example of a second coil.
  • the yaw driving unit 352 is an example of a second driving unit.
  • the coil unit 310 includes the pitch coil 311, the pitch opposing yoke 312, the yaw opposing yoke 313, the yaw coil 314, and the Hall elements 341 and 342.
  • the coil unit 310 is provided on the opposite side of the subject from the camera module 104 of the pitch unit 100 included in the yaw unit 200.
  • Each component of the coil unit 310 is arranged so that the center of gravity is located on the axis Y.
  • the constituent elements of the coil unit 310 are arranged on the axis Y from the subject side in the order of the pitch coil 311 and the hall element 341, the pitch opposing yoke 312, the yaw opposing yoke 313, the yaw coil 314, and the hall element 342.
  • the pitch opposing yoke 312 is made of a magnetic material steel plate curved in an arc shape.
  • the pitch opposing yoke 312 is arranged so that the center of the arc coincides with the axis X.
  • the yaw counter yoke 313 is made of a magnetic material steel plate curved in an arc shape.
  • the yaw opposing yoke 313 is arranged so that the center of the arc coincides with the axis Z.
  • the pitch coil 311, the pitch opposing yoke 312, the yaw opposing yoke 313, and the yaw coil 314 are integrally fixed by a fixing means such as adhesion or heat fusion. Further, the yaw counter yoke 313 is fastened and fixed to the yaw frame (upper) 201. As a result, the entire coil unit 310 is fixed to the yaw unit 200.
  • the Hall element 341 is arranged inside pitch coil 311.
  • the hall element 341 is fixed to the surface of the pitch facing yoke 312 on the pitch coil 311 side. Assume a boundary between the N pole and the S pole on the side facing the pitch coil 311 when the pitch magnets 332 and 334 are regarded as one magnet. As shown in FIG. 8A, when the pitch unit 100 is in the center position, the Hall element 341 is arranged to face this boundary.
  • the hall element 341 detects the magnetic flux generated by the pitch magnets 332 and 334.
  • the detection result of the Hall element 341 is information indicating the relative position between the pitch coil 311 and the pitch magnet unit 330, that is, information indicating the position of the pitch unit 100.
  • the hall element 341 and the pitch magnets 332 and 334 function as a position detection unit of the pitch unit 100.
  • Hall element 342 is disposed inside yaw coil 314.
  • the hall element 342 is fixed to the surface of the yaw counter yoke 313 on the yaw coil 314 side. Assume a boundary between the north and south poles on the side facing the yaw coil 314 when the yaw magnets 321 and 323 are regarded as one magnet. As shown in FIG. 8B, when the yaw unit 200 is at the center position, the Hall element 342 is arranged to face this boundary.
  • the hall element 342 detects magnetic flux generated by the yaw magnets 321 and 323.
  • the detection result of the Hall element 342 is information indicating the relative position between the yaw coil 314 and the yaw magnet unit 320, that is, information indicating the position of the yaw unit 200.
  • the hall element 342 and the yaw magnets 321 and 323 function as a position detection unit of the yaw unit 200.
  • the coil unit 310 is connected to the coil FPC 340.
  • One end of the coil FPC 340 is electrically connected to the pitch coil 311, the yaw coil 314, and the Hall elements 341 and 342.
  • the other end of the coil FPC 340 is electrically connected to a drive control circuit (not shown).
  • the drive control circuit can control the rotation of the pitch unit 100 in the pitch direction (around the axis X) by energizing the pitch coil 311.
  • the drive control circuit can control the rotation of the yaw unit 200 in the yaw direction (around the axis Z) by energizing the yaw coil 314. Further, the drive control circuit receives detection results by the Hall elements 341 and 342.
  • the drive control circuit controls the position of the pitch unit 100 based on the detection result of the Hall element 341, that is, the position information of the pitch unit 100.
  • the drive control circuit controls the position of the yaw unit 200 based on the detection result of the Hall element 342, that is, the position information of the yaw unit 200.
  • the pitch magnet unit 330 is arranged on the opposite side of the pitch module 100 from the subject with respect to the camera module 104 and on the optical axis of the camera module 104.
  • the pitch magnet unit 330 includes pitch magnets 332 and 334 and pitch back yokes 331 and 333.
  • Each of the pitch magnets 332 and 334 has a single pole (N pole or S pole) magnetized on the surface facing the pitch coil 311. Pitch magnets 332 and 334 are arranged such that different poles face pitch coil 311. Each of the pitch magnets 332 and 334 is arranged in such an orientation that the normal line of the surface facing the pitch coil 311 intersects at one point on the axis X.
  • the pitch back yokes 331 and 333 are made of flat steel plates made of magnetic material.
  • the pitch back yokes 331 and 333 are fixed to a surface of the pitch magnets 332 and 334 opposite to the surface facing the pitch coil 311 by a fixing means such as adhesion.
  • the pitch coil 311 is disposed to face the pitch magnets 332 and 334 with a predetermined gap therebetween.
  • the yaw magnet unit 320 is disposed on the opposite side of the outer frame 400 from the subject with respect to the camera module 104. When the camera module 104 is in the center position, the yaw magnet unit 320 is located on the axis Y.
  • the yaw magnet unit 320 includes yaw magnets 321 and 323 and yaw back yokes 322 and 324.
  • the yaw magnet 321, the yaw back yoke 322, the yaw magnet 323, and the yaw back yoke 324 are fixed to the yaw magnet holder 325 by fixing means such as adhesion.
  • the yaw magnet holder 325 is fastened and fixed to the outer frame (lower) 402. In this way, the yaw magnet unit 320 is held by the outer frame 400.
  • Each of the yaw magnets 321 and 323 has a single pole (N pole or S pole) magnetized on the surface facing the yaw coil 314.
  • the yaw magnets 321 and 323 are arranged such that different poles face the yaw coil 314.
  • Each of the yaw magnets 321 and 323 is disposed in such an orientation that the normal line of the surface facing the yaw coil 314 intersects at one point on the axis Z.
  • the yaw back yokes 322 and 324 are made of flat steel plates made of magnetic material.
  • the yaw back yokes 322 and 324 are fixed to a surface of the yaw magnets 321 and 323 opposite to the surface facing the yaw coil 314 by a fixing means such as adhesion.
  • the yaw coil 314 is disposed to face the yaw magnets 321 and 323 via a predetermined gap.
  • FIG. 9 is a perspective view showing a shape when the sensor FPC 105 is incorporated in the camera unit 500.
  • FIG. 10 is a development view of the sensor FPC 105. The shape shown in FIG. 9 can be obtained by bending and bending each part of the flat plate sensor FPC 105 shown in FIG.
  • the sensor FPC 105 electrically connects an image sensor included in the camera module 104 and a video circuit outside the camera unit 500.
  • the imaging sensor is controlled by the video circuit via the sensor FPC 105 to perform an imaging operation, and outputs image data to the video circuit.
  • the sensor FPC 105 includes a first bent portion 105a, a second bent portion 105b, a first connecting portion 105c, a second connecting portion 105d, a first fixing portion 105e, a second fixing portion 105f, a third fixing portion 105g, and a slit portion 105h. Is provided.
  • the first connection unit 105 c is electrically connected to the camera module 104.
  • the second connection unit 105d is electrically connected to the video circuit.
  • the sensor FPC 105 includes a conducting wire that electrically connects the first connection portion 105c and the second connection portion 105d, which are both ends.
  • the camera module 104 and the video circuit are electrically connected by the conducting wire.
  • the first connection portion 105c In the wiring path of the conducting wire of the sensor FPC 105, in order from the first connection portion 105c, the first connection portion 105c, the first bent portion 105a, the first fixed portion 105e, the third fixed portion 105g, the second bent portion 105b, and the second fixed portion.
  • the part 105f and the second connection part 105d are arranged.
  • the second bent portion 105b is provided with a slit portion 105h.
  • the first connection part 105 c is fixed to the pitch frame 101 of the pitch unit 100.
  • the first fixing portion 105 e is fixed to the yaw frame (upper) 201 of the yaw unit 200.
  • the first bent portion 105a is provided between the first connecting portion 105c and the first fixing portion 105e.
  • the first bent portion 105a has a first bent surface that is parallel to the pitch rotation axis 106 (or axis X). Further, as described above, the first connecting portion 105 c is fixed to the pitch unit 100, and the first fixing portion 105 e is fixed to the yaw unit 200. Therefore, according to the rotation of the pitch unit 100, the first bent portion 105a bends at the first bent surface.
  • the first bent portion 105 a has a sufficient length so as not to hinder the rotation of the pitch unit 100 within the rotation range of the pitch unit 100.
  • the second fixing portion 105f is fixed to the outer frame (upper) 401 of the outer frame 400.
  • the third fixing portion 105 g is fixed to the yaw frame (upper) 201 of the yaw unit 200.
  • the second bent portion 105b is provided between the second fixed portion 105f and the third fixed portion 105g.
  • the second bent portion 105b has a second bent surface that is parallel to the yaw rotation axes 208 and 209 (or the axis Z).
  • the second connecting portion 105 d is fixed to the outer frame 400, and the third fixing portion 105 g is fixed to the yaw unit 200. Therefore, according to the rotation of the yaw unit 200, the second bent portion 105b bends at the second bent surface.
  • the second bent portion 105b has a sufficient length so as not to hinder the rotation of the yaw unit 200 within the rotation range of the yaw unit 200.
  • the first bent portion 105a and the second bent portion 105b are always bent within a range in which the pitch unit 100 and the yaw unit 200 can rotate. In other words, it does not become unbent at any position within the rotation range. For this reason, the change in resistance to rotation is smaller than in the case where the bending state can be taken at a certain position in the rotation range. As a result, the position control of the pitch unit 100 and the yaw unit 200 becomes easy, and the image blur correction performance of the camera unit 500 becomes higher.
  • both the first fixing portion 105e and the third fixing portion 105g are fixed to the yaw unit 200.
  • the positional relationship between the wiring path between the first fixed portion 105e and the third fixed portion 105g does not change even when the pitch unit 100 and the yaw unit 200 rotate. Therefore, the two fixing portions of the first fixing portion 105e and the third fixing portion 105g may be collectively fixed to the yaw unit 200 as one fixing portion.
  • the second bent portion 105b is disposed in a space between the yaw frame (upper) 201 of the yaw unit 200 and the outer frame (upper) 401 of the outer frame 400 in the axis Z direction.
  • the second fixing portion 105f is fixed to the outer frame (upper) 401 on the side farther from the subject in the direction of the axis Y.
  • the third fixing portion 105g is fixed to the side closer to the subject than the second fixing portion 105f in the direction of the axis Y in the yaw frame (upper) 201.
  • the first bent portion 105a is arranged at a position overlapping the second bent portion 105b in the direction of the axis Y.
  • the second bent portion 105b can be made as long as possible in a limited space inside the camera unit 500. If the second bent portion 105b can be secured long, less force is required to bend the second bent portion 105b when the yaw unit 200 is rotated. That is, the reaction force against the rotation of the yaw unit 200 is reduced. Therefore, the response speed when rotating the yaw unit 200 is improved.
  • the second bent portion 105b is provided with a slit portion 105h in a direction parallel to the conducting wire. Then, in the second fixing portion 105f and the third fixing portion 105g located at both ends in the longitudinal direction of the slit portion 105h, two second bends divided by the slit portion 105h are formed by folding at a fold line parallel to the longitudinal direction. The parts 105b face each other. With this configuration, the entire second bent portion 105b is configured by the second bent surface parallel to the axis Z, and the dimension of the second bent portion 105b in the axis Z direction can be reduced. Therefore, the size of the camera unit 500 in the axis Z direction can be reduced.
  • FIG. 11A to 11C are cross-sectional views taken along the lines XI-XI of the pitch unit 100 and its peripheral part during rotation.
  • FIG. 11B shows a state where the pitch unit 100 is at the center position.
  • a current is applied to the pitch coil 311 by an external drive control circuit, a force is generated in the pitch coil 311 according to the direction of the magnetic flux and the direction of the current according to Fleming's left-hand rule.
  • the pitch unit 100 rotates.
  • the relative positions of the first fixed portion 105e and the first connecting portion 105c of the sensor FPC 105 change.
  • the first bent portion 105a of the sensor FPC 105 bends according to this relative position change.
  • 11A and 11C show a state where the pitch unit 100 is rotated from the center position.
  • the drive control circuit has a gyro sensor.
  • the gyro sensor outputs posture information of the camera unit 500, more specifically, the outer frame 400.
  • the drive control circuit controls the pitch unit 100 to be driven in a direction in which the image blur in the rotational direction around the axis X is suppressed based on the posture information from the gyro sensor and the position information from the hall element 341. In this way, the camera unit 500 drives the camera module 104 in the pitch direction.
  • the pitch range of the pitch unit 100 is restricted when the pitch frame 101 contacts the yaw frame (upper) 201 and the yaw frame (lower) 202.
  • a magnetic attraction force is always generated between the pitch magnets 332 and 334 and the pitch opposing yoke 312.
  • each of the pitch opposing yoke 312 and the pitch magnets 332 and 334 is disposed along the circumferential direction with the axis X as the center. For this reason, even if the position of the pitch unit 100 changes, the distance between the pitch magnets 332 and 334 and the portion of the pitch opposing yoke 312 facing the pitch magnets 332 and 334 becomes substantially constant. For this reason, it can be considered that the magnetic attraction force does not change depending on the position of the pitch unit 100. Therefore, with this configuration, it is possible to stably suppress image blur in the pitch direction.
  • FIG. 12A to 12C are cross-sectional views of the yaw unit 200 during rotation and the periphery thereof taken along a cross-section XII-XII.
  • FIG. 12B shows a state when the yaw unit 200 is at the center position.
  • the drive control circuit controls the yaw unit 200 to be driven in a direction in which the image shake in the rotational direction around the axis Z is suppressed based on the posture information from the gyro sensor and the position information from the hall element 342. In this way, the camera unit 500 drives the camera module 104 in the yaw direction.
  • the rotation range of the yaw unit 200 is restricted when the yaw frame (upper) 201 and the yaw frame (lower) 202 abut on the outer frame (upper) 401 and the outer frame (lower) 402.
  • a magnetic attractive force is always generated between the yaw magnets 321 and 323 and the yaw counter yoke 313.
  • each of the yaw opposing yoke 313 and the yaw magnets 321 and 323 is disposed along the circumferential direction with the axis Z as the center.
  • the distance between the yaw magnets 321 and 323 and the portion of the yaw facing yoke 313 facing the yaw magnets 321 and 323 is substantially constant. For this reason, it can be considered that the magnetic attraction force does not change depending on the position of the yaw unit 200. Therefore, with this configuration, it is possible to stably suppress image blur in the yaw direction.
  • the camera unit 500 can drive the camera module 104 in the directions of the axis X and the axis Z. Therefore, a camera unit excellent in image blur suppression in the directions of the axes X and Z can be realized.
  • the inner region defined by the outer periphery of the pitch coil 311 disposed in the yaw unit 200 is defined by the outer periphery of the yaw coil 314 disposed in the yaw unit 200. It overlaps with the inner area.
  • the camera unit 500 is located at the center position within the range in which the pitch unit 100 is rotatable, and when the yaw unit 200 is at the center position within the range within which the pitch unit 100 is rotatable, 104, pitch rotation shaft 106 and yaw rotation shafts 208 and 209, pitch magnet unit 330, pitch coil 311, yaw coil 314, and yaw magnet unit 320 are arranged in this order.
  • the camera unit 500 can be reduced in size in the radial direction. That is, the camera unit 500 arranges the pitch magnet unit 330 and the pitch coil 311 that drive the pitch unit 100 held by the yaw unit 200 on the optical axis closer to the camera module 104, while the yaw unit 200 yaw
  • the magnet unit 320 and the yaw coil 314 are arranged on the optical axis farther from the camera module 104. Thereby, the rotation in the pitch direction and the yaw direction can be realized while reducing the size of the camera unit 500 in the radial direction.
  • the pitch coil 311 and the yaw coil 314 can be arranged in the yaw unit 200 that is the same member that is driven integrally. For this reason, wiring from the outside of the camera unit 500 to the pitch coil 311 and the yaw coil 314 can be realized only by wiring to the yaw unit 200, and the wiring configuration can be simplified.
  • the yaw unit 200 holds the camera module 104 via the pitch unit 100. Therefore, the mass of the pitch unit 100 can be reduced with respect to the mass of the yaw unit 200 including the pitch unit 100. For this reason, the response speed of the rotation of the pitch unit 100 is faster than the response speed of the rotation of the yaw unit 200.
  • the pitch direction tends to be more easily shaken with respect to the yaw direction. For this reason, by incorporating the camera unit 500 in the camera so that the direction of the rotation axis in the pitch direction of the camera coincides with the direction of the pitch rotation axis 106, the shake in the pitch direction is more accurate than the shake in the yaw direction.
  • a camera capable of correcting well can be provided.
  • the camera unit 500 may be incorporated in the camera so that the direction of the rotation axis of the yaw direction of the camera matches the direction of the pitch rotation axis 106. . By doing so, it is possible to provide a camera that can more accurately correct the shake in the yaw direction with respect to the shake in the pitch direction.
  • the pitch driving unit 351 that is, the pitch magnet unit 330 and the pitch coil 311 are arranged along the axis Y so as to face each other.
  • the yaw driving unit 352, that is, the yaw coil 314 and the yaw magnet unit 320 are arranged to face each other along the axis Y. That is, the entire drive unit 300 is disposed along the axis Y on the side opposite to the subject with respect to the camera module 104.
  • the pitch magnet unit 330 and the pitch coil 311 are opposed to each other in the radial direction around the axis Y, or the yaw coil 314 and the yaw magnet unit 320 are arranged to face each other in the radial direction.
  • the gravity center position of the pitch unit 100 coincides with the axis X.
  • the center of gravity position of the yaw unit 200 coincides with the axis Z. For this reason, even if an impact load (disturbance) is applied to the camera unit 500, an unnecessary force is hardly generated in each rotational direction of the pitch unit 100 and the yaw unit 200, and thus a camera capable of suppressing image blur more stably. A unit can be realized.
  • the pitch coil 311 and the yaw coil 314 are integrally held with respect to the yaw unit 200 along the axis Y.
  • the dimension of the axis Y direction of the coil unit 310 can be shortened.
  • the yaw coil 314 and the yaw magnet unit 320 can be arranged closer to the axis Z that is the center of rotation. If the yaw coil 314 and the yaw magnet unit 320 can be disposed near the axis Z, the central angle when these are regarded as arcs around the axis Z becomes large. That is, the rotation range of the yaw unit by the yaw driving unit 352 can be widened.
  • the camera unit 500 can be made smaller and lighter.
  • the pitch magnets 332 and 334 also serve as components of the pitch drive unit 351 and components of the position detection unit of the pitch unit 100.
  • the yaw magnets 321 and 323 also serve as components of the yaw drive unit 352 and components of the position detection unit of the yaw unit 200. With this configuration, a small and low-cost camera unit can be realized.
  • the camera unit according to the present embodiment is different from the camera unit 500 according to the first embodiment in that a position detection unit 345 is provided instead of the hall element 342.
  • the camera unit 500 according to the first embodiment is configured such that the Hall element 342 detects the position of the yaw unit 200 by detecting the magnetic flux of the yaw magnets 321 and 323 constituting the yaw driving unit 352. That is, the yaw magnets 321 and 323 are part of the yaw driving unit 352 and part of the position detection unit of the yaw unit 200.
  • the camera unit of the present embodiment has a configuration in which the position detection unit 345 detects the position of the yaw unit 200.
  • the position detection unit 345 includes an independent sensor magnet 344 for position detection. Since other configurations are the same as those of the camera unit 500 of the first embodiment, the description thereof is omitted.
  • FIG. 13 is an external perspective view of the yaw unit 200 according to the present embodiment and the periphery thereof.
  • 14A is an arrow view of the yaw unit 200 in FIG. 13 as viewed from the direction of the axis Z (direction I).
  • 14B is a cross-sectional view of the yaw unit 200 taken along the line XIV-XIV in FIG. 14A.
  • FIG. 14C is an enlarged view of the XIV portion in FIG. 14B.
  • the sensor FPC 105 is omitted in FIG.
  • the position detector 345 of the yaw unit 200 detects the relative position between the yaw unit 200 and the outer frame 400.
  • the position detection unit 345 includes a hall element 343 and a sensor magnet 344.
  • the sensor magnet 344 is fixed to a position facing the yaw unit 200 in the outer frame (lower) 402 of the outer frame 400.
  • the hall element 343 is fixed at a position facing the sensor magnet 344 in the yaw frame (lower) 202.
  • the hall element 343 has a magnetic sensitive surface.
  • the hall elements 343 are arranged side by side in the direction of the axis Z so that the magnetosensitive surface faces the sensor magnet 344.
  • the position detection unit 345 is disposed in the vicinity of the yaw drive unit 352. More specifically, the position detection unit 345 is disposed on the same side as the yaw driving unit 352 with respect to a virtual plane that passes through the yaw rotation axes 208 and 209 and is perpendicular to the axis Y. More specifically, the position detection unit 345 is disposed on a virtual plane that passes through the yaw driving unit 352 and is perpendicular to the axis Y.
  • the perpendiculars of the surfaces facing the yaw coil 314 are all perpendicular to the axis Z. Further, by arranging as described above, the perpendicular to the magnetic sensitive surface of the Hall element 343 becomes parallel to the axis Z. Therefore, the direction of the magnetic sensitive surface of the Hall element 343 is perpendicular to the direction of the surface of the yaw magnets 321 and 323 facing the yaw coil 314.
  • Hall element 343 detects magnetic flux by sensor magnet 344 on the magnetic sensitive surface.
  • the detection result of the Hall element 343 is position information indicating the position of the yaw unit 200.
  • Hall element 343 is electrically connected to coil FPC 340.
  • the drive control circuit receives the detection result by the Hall element 343 as position information of the yaw unit.
  • the drive control circuit controls the position of the yaw unit 200 based on the position information.
  • FIG. 15A to 15C are schematic diagrams showing changes in the state of the position detection unit 345 accompanying the rotation of the yaw unit 200.
  • FIG. The sensor magnet 344 is magnetized with two poles (N pole, S pole) in the circumferential direction around the axis Z on the surface facing the Hall element 343.
  • the sensor magnet 344 includes an N pole and an S pole arranged in the circumferential direction about the axis Z.
  • FIG. 15B when the yaw unit 200 is in the center position, the Hall element 343 faces the boundary between the N pole and the S pole of the sensor magnet 344.
  • the sensor magnet 344 and the hall element 343 have a predetermined gap in the direction of the axis Z regardless of the position of the yaw unit 200.
  • the sensor magnet 344 is an example of a third magnet.
  • the hall element 343 is an example of a detection sensor.
  • the camera unit according to the present embodiment includes the position detection unit 345.
  • the Hall element 343 of the position detection unit 345 is arranged in such a direction that the direction of the magnetosensitive surface is perpendicular to the direction of the pitch magnet unit 330 and the yaw magnet unit 320. With this configuration, it is possible to realize a camera unit with reduced position detection errors. This will be specifically described below.
  • the relative position of the Hall element 343 and the sensor magnet 344 changes according to the position of the yaw unit 200.
  • the hall element 343 detects the magnetic flux generated by the sensor magnet 344.
  • the detection result of the Hall element 343 is position information of the yaw unit 200.
  • the external drive control circuit controls the yaw unit 200 to be driven in a direction in which the image shake in the rotational direction around the axis Z is suppressed based on the position information and the posture information from the gyro sensor. For this reason, the linearity of the waveform output from the Hall element 343 determines the image blur correction accuracy.
  • high detection accuracy is required for the Hall element 343. That is, the mounting accuracy of the sensor magnet 344 and the hall element 343 and the magnetization accuracy of the sensor magnet 344 are required.
  • the magnetic flux from the yaw magnet unit 320 is less likely to enter the magnetic sensitive surface of the Hall element 343 due to the above-described configuration.
  • the magnetic flux (circular arrow in FIG. 14C) generated from the yaw coil 314 is also substantially perpendicular to the perpendicular to the magnetic sensitive surface of the Hall element 343, so that it is difficult for the magnetic flux to enter. That is, the detection result of the Hall element 343 is less affected by the magnetic flux of the yaw magnet unit 320 and the magnetic flux generated from the yaw coil 314.
  • the configuration including the position detection unit 345 for detecting the position of the yaw unit 200 has been described.
  • the independent position detection unit is not limited to the position detection of the yaw unit 200.
  • a position detection unit having the same configuration as the position detection unit 345 of the present embodiment may be provided instead of the Hall element 341.
  • Embodiment 3 A camera unit 900 according to Embodiment 3 will be described with reference to FIGS. 16A to 21C.
  • FIG. 16A is an external perspective view of the camera unit 900 of the present embodiment.
  • FIG. 16B is a perspective view of the rotation unit 700 and its periphery.
  • the camera unit 900 includes a pitch unit 600, a rotation unit 700, an outer frame 760, and a drive unit 830.
  • FIG. 17 is an exploded perspective view of the pitch unit 600 and the drive unit 830.
  • the pitch unit 600 includes a camera module 610.
  • the camera module 610 includes a lens unit 611, a lens holder 612, a sensor unit 620, and a holder base 613.
  • the lens holder 612 includes a pitch rotation shaft 614.
  • the lens holder 612 holds the lens unit 611.
  • the pitch rotation shaft 614 is provided on the lens holder 612 so that the axis direction is perpendicular to the optical axis of the lens unit 611.
  • a virtual axis that coincides with the pitch rotation axis 614 is defined as an axis X.
  • the positional relationship between the axis X and the pitch unit 600 is fixed.
  • the sensor unit 620 is held in the lens holder 612 at a position opposite to the subject with respect to the lens unit 611.
  • the sensor unit 620 includes an image sensor 620a.
  • the lens unit 611 forms an image of light from the subject on the image sensor 620a.
  • the image sensor 620a captures a subject image and generates image data.
  • the lens holder 612 is fastened and fixed to the holder base 613 with the sensor unit 620 sandwiched between the lens holder 612 and the holder base 613.
  • the imaging sensor 620a is electrically connected to a video circuit (not shown) via a sensor FPC (not shown).
  • the axis X is an example of a first axis.
  • the magnet 630 is bonded and fixed to the opposite side of the holder base 613 from the subject. That is, the magnet 630 is arranged on the opposite side of the camera module 610 from the subject. The material, weight, arrangement, and the like of each part are adjusted so that the center of gravity position of the pitch unit 600 and the magnet 630 is on the axis X. The magnet 630 will be described later.
  • FIG. 18 is an exploded perspective view of the camera unit 900.
  • the rotation unit 700 includes a rotation frame 710.
  • the rotating frame 710 includes a contact surface 710a and a bearing 710b.
  • the contact surface 710 a is formed on the outer peripheral side of the rotating frame 710.
  • the bearing 710 b supports the pitch rotation shaft 614 of the pitch unit 600.
  • the bearing 710b is located on the axis X. That is, the positional relationship between the axis X and the rotation unit 700 (the rotation frame 710) is fixed. In this manner, the rotation unit 700 supports the pitch unit 600 so as to be rotatable around the pitch rotation axis 614.
  • the rotation of the pitch unit 600 around the axis X with respect to the rotation unit 700 is expressed as the pitch unit 600 rotates in the pitch direction or simply the pitch unit 600 rotates.
  • the direction of the optical axis of the camera module 610 when the pitch unit 600 is at the center position within the rotatable range is defined as an axis Y. That is, the positional relationship between the axis Y and the rotation unit 700 (the rotation frame 710) is fixed.
  • the axis Y is an example of the second axis.
  • the outer frame 760 includes a fixed frame 720, a front frame 740, and a rear frame 750.
  • the fixed frame 720 has a cylindrical shape.
  • the fixed frame 720 is arranged with respect to the rotation unit 700 so that the center line of the cylinder coincides with the axis Y.
  • Three ball guide grooves 720 a are formed on the inner surface side of the fixed frame 720. Between the contact surface 710a of the rotating frame 710 and the ball guide groove 720a, a ball 730 is disposed corresponding to each ball guide groove. The ball 730 contacts the contact surface 710a and the ball guide groove 720a.
  • the fixed frame 720 supports the rotary frame 710 in the direction of the axis Y and the direction perpendicular to the axis Y via the balls 730.
  • the ball guide groove 720a, the contact surface 710a, and the ball 730 constitute a ball bearing.
  • the fixed frame 720 supports the rotating frame 710 so as to be rotatable around the axis Y through the configuration of the ball bearing. That is, the outer frame 760 supports the rotation unit 700 so as to be rotatable around the axis Y.
  • the rotation of the rotation unit 700 around the axis Y with respect to the outer frame 760 is expressed as the rotation unit 700 rotating in the rotation direction or simply the rotation unit 700 rotating.
  • the ball guide groove 720a is a groove provided to reduce the rotational load of the rotating frame 710 when the ball 730 rolls, and forms a rotation range corresponding to the rotation angle of the rotating frame 710. .
  • the front frame 740 is fastened and fixed to the subject side in the axis Y direction of the fixed frame 720.
  • the rear frame 750 is fastened and fixed to the opposite side of the fixed frame 720 from the subject in the axis Y direction.
  • a coil unit 800 described later is fixed to the rear frame 750.
  • the opposing yoke 808 included in the coil unit 800 and the magnet 630 fixed to the pitch unit 600 magnetically attract each other. For this reason, the rotation unit 700 that supports the pitch unit 600 is applied with a force toward the opposite side of the subject with respect to the axis Y.
  • the rotation unit 700 is pressed against the fixed frame 720 by the magnetic biasing force with the ball 730 sandwiched therebetween.
  • the rotation unit 700 can rotate without rattling.
  • the front frame 740 and the rotating frame 710 are arranged with a predetermined gap. The front frame 740 prevents the rotation unit 700 from falling off.
  • each part are adjusted so that the center of gravity position of the pitch unit 600, the magnet 630, and the rotation unit 700 is on the axis Y.
  • the drive unit 830 includes a magnet 630 and a coil unit 800.
  • the magnet 630 is fixed on the opposite side of the pitch unit 100 from the subject.
  • the coil unit 800 is fixed to the rear frame 750.
  • the coil unit 800 is disposed to face the magnet 630 with a predetermined gap.
  • the coil unit 800 includes a pitch coil 801, a rotation coil 810, a counter yoke 808, and Hall elements 806 and 807.
  • the magnet 630 and the pitch coil 801 constitute a pitch driving unit 821.
  • the magnet 630 and the rotation coil 810 constitute a rotation driving unit 822.
  • Rotation coil 810 includes rotation coils 802, 803, 804, 805.
  • the rotation coils 802, 803, 804, and 805 are arranged on an arc surface whose center coincides with the pitch rotation axis 614 (axis X).
  • the counter yoke 808 is made of a magnetic material steel plate.
  • Each of pitch coil 801, rotation coil 810, and counter yoke 808 has an arc shape, and is arranged so that the center of the arc coincides with pitch rotation axis 614 (axis X).
  • the pitch coil 801, the rotation coil 810, and the opposing yoke 808 are stacked on the axis Y in the order of the pitch coil 801, the rotation coil 810, and the opposing yoke 808 from the subject side.
  • Each of pitch coil 801, rotation coil 810, and opposing yoke 808 is arranged such that the center of gravity is located on axis Y. Further, the pitch coil 801, the rotation coils 802, 803, 804, 805, the opposing yoke 808, and the coil FPC are integrally fixed by a fixing means such as adhesion. The pitch coil 801, the rotation coils 802, 803, 804, 805 and the Hall elements 806, 807 are electrically connected to the coil FPC. The coil FPC electrically connects the coil unit 800 and an external drive control circuit (not shown).
  • the magnet 630 has an arc shape, and is bonded and fixed to the holder base 613 so that the center of the arc coincides with the pitch rotation axis 614 (axis X).
  • the magnet 630 is fixed to the opposite side of the holder base 613 from the subject.
  • the magnet 630 is arranged so that the center of gravity is on the optical axis of the camera module 610.
  • the magnet 630 is magnetized with two poles (N pole, S pole) in the circumferential direction about the axis X. That is, the magnet 630 includes an N pole and an S pole arranged in the circumferential direction around the axis X.
  • the magnet 630 and the coil unit 800 are arranged on the axis Y in the order of the magnet 630 and the coil unit 800 from the subject side.
  • the magnet 630 and the pitch coil 801 closest to the magnet 630 in the coil unit 800 are disposed so as to face each other with a predetermined gap.
  • FIGS. 20A to 20C show the components of the pitch driving unit 821 as viewed from the subject in the axis Y direction.
  • the pitch unit 600 rotates about the axis X.
  • the pitch unit 600 rotates in the direction shown in FIG. 19A (clockwise on the paper surface).
  • the pitch unit 600 rotates in the direction shown in FIG. 19C (counterclockwise in the drawing).
  • 21A to 21C are diagrams showing changes in the state of the rotation driving unit 822 accompanying the rotation of the rotation unit 700.
  • FIG. FIGS. 21A to 21C show a state in which the components of the rotation driving unit 822 are viewed toward the subject in the axis Y direction.
  • a current is applied to the rotation coil 810 by the drive control circuit, a force is generated in the rotation coil 810 according to the direction of the magnetic flux and the direction of the current according to Fleming's left-hand rule.
  • the rotation unit 700 rotates about the axis Y.
  • a case is considered in which a current is applied to each of the coils constituting the rotation coil 810 in the direction shown in FIG. .
  • the rotation unit 700 rotates in the direction shown in FIG. 21A (counterclockwise on the paper surface).
  • the rotation coils 802 and 804 are counterclockwise and the rotation coils 803 and 805 are clockwise. think of.
  • the rotation unit 700 rotates in the direction shown in FIG.
  • the position detection by the Hall elements 806 and 807 when the pitch unit 600 and the rotation unit 700 are rotated will be described.
  • the positional relationship between magnet 630 and Hall elements 806 and 807 changes.
  • the external drive control circuit can determine how much the pitch unit 600 and the rotation unit 700 are rotating from the outputs of the Hall elements 806 and 807, respectively.
  • the polarity (plus and minus) of the output of the Hall element is determined depending on which of the N and S poles in the magnet 630 the Hall element is facing. Further, the magnitude (absolute value) of the output of the Hall element is determined based on the distance from the boundary line between the N pole and S pole of the magnet 630 to the Hall element. Therefore, the drive control circuit can determine the positional relationship between the magnet 630 fixed to the camera module 610 and the Hall elements 806 and 807 fixed to the outer frame 760 from the outputs of the two Hall elements 806 and 807. That is, the drive control circuit can determine how much each of the pitch unit 600 and the rotation unit 700 is rotating.
  • a specific example will be described.
  • FIG. 20B shows a state of the pitch driving unit 821 when each of the pitch unit 600 and the rotation unit 700 is in the center position.
  • FIG. 21B shows a state of the rotation drive unit 822 when each of the pitch unit 600 and the rotation unit 700 is in the center position.
  • the determination method of the position of each unit including the case where the pitch unit 600 and the rotation unit 700 rotate together is as follows. First, the drive control circuit obtains an average value of the outputs of the two Hall elements. The drive control circuit can determine the position of the pitch unit 600 from the polarity and absolute value of the average value. Next, the drive control circuit subtracts the average value from each of the outputs of the two Hall elements. The drive control circuit can determine the position of the rotation unit 700 from the two subtraction results.
  • the drive control circuit drives the pitch unit 600 and the rotation unit 700 in a direction in which image blur is suppressed based on the video signal from the camera module 610 and the position information from the Hall elements 806 and 807. Control.
  • the camera unit 900 of the present embodiment includes a pitch unit 600, a rotation unit 700, an outer frame 760, and a drive unit 830.
  • the driving unit 830 includes a pitch driving unit 821 and a rotation driving unit 822.
  • the pitch unit 600 holds the camera module 610.
  • the rotation unit 700 holds the pitch unit 600 so as to be rotatable on the pitch rotation shaft 614 (axis X).
  • the outer frame 400 holds the rotation unit 700 so as to be rotatable about the axis Y.
  • the direction of the axis Y is perpendicular to the direction of the pitch rotation axis 614.
  • the pitch driving unit 821 includes a magnet 630 disposed in the pitch unit 600 and a pitch coil 801 disposed in the outer frame 760.
  • the pitch driving unit 821 is disposed on the opposite side of the subject from the camera module 610.
  • the pitch driving unit 821 rotates the pitch unit 600 around the rotation axis 614 with respect to the rotation unit 700 by the interaction between the magnet 630 and the pitch coil 801.
  • the rotation driving unit 822 includes a magnet 630 disposed in the pitch unit 600 and a rotation coil 810 disposed in the outer frame 760.
  • the rotation driving unit 822 is disposed on the opposite side of the subject from the camera module 104.
  • the rotation driving unit 822 rotates the rotation unit 700 around the axis Y with respect to the outer frame 760 by the interaction of the magnet 630 and the rotation coil 810.
  • the direction of the optical axis of the camera module 610 can be freely driven in the axis X direction and the axis Y direction. Therefore, it is possible to realize an excellent camera unit that can suppress image blur in these directions. Further, since it can be considered that the magnetic attractive force between the magnet 630 and the opposing yoke 808 does not change depending on the position of the pitch unit 600, a camera unit suitable for miniaturization with less unnecessary load can be realized. Further, the magnet 630 also serves as a component of the pitch drive unit 821, a component of the rotation drive unit 822, and a component of the position detection unit. With this configuration, a small and low-cost camera unit can be realized.
  • the first axis of the present embodiment is the axis X that is the rotation axis in the pitch direction, but is not limited to this, and the first axis may be configured to be in the yaw direction.
  • the magnet of the third embodiment has an arc-shaped integrated shape magnetized with two poles, as in the first and second embodiments, different flat magnetic poles (N pole, S pole) Two magnets having a may be arranged adjacent to each other.
  • Embodiments 1 to 3 have been described as examples of the technology disclosed in the present application.
  • the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed.
  • the pitch magnet unit 330 is provided in the pitch unit 100, the pitch coil 311 and the yaw coil 314 are provided in the yaw unit 200, and the yaw magnet unit 320 is provided in the outer frame 400.
  • the driving unit 300 it is only necessary that the pitch driving unit 351 and the yaw driving unit 352 are arranged side by side on the optical axis when the camera module 104 is in the center position. In other words, when viewed from the direction of the axis Y, the inner region defined by the outer peripheries of the two members provided in the yaw unit 200 may be configured to overlap.
  • the pitch coil 311, the pitch magnet unit 330, the yaw magnet unit 320, and the yaw coil 314 may be arranged in this order from the subject side.
  • the camera unit 500 can reduce the size in the radial direction.
  • the configuration of the camera unit 500 in the first embodiment is more desirable because two coil units can be arranged in the yaw unit 200 and the configuration of wiring can be simplified.
  • the sensor FPC includes a first connection portion connected to the camera module, a second connection portion connected to an external circuit, and a first parallel to the axis X as the pitch unit rotates relative to the yaw unit.
  • a flexible print having a first bent portion that can be bent on a bent surface and a second bent portion that can be bent on a second bent surface parallel to the axis Z as the yaw unit rotates with respect to the outer frame. Any substrate may be used.
  • the first bent portion of the sensor FPC may be configured to be disposed at a position overlapping the second bent portion in the direction of the axis Y.
  • the sensor FPC 1052 includes a first bent portion 1052a, a second bent portion 1052b, a first connecting portion 1052c, a second connecting portion 1052d, a first fixing portion 1052e, and a second fixing portion 1052f.
  • Each part of sensor FPC 1052 corresponds to each part of the same name of sensor FPC 105 described in the first embodiment.
  • fixed part 1052e becomes a structure which served as the 1st fixing
  • the second bent portion 1052b is arranged in a space between the housing of the yaw unit 200 and the outer frame 400 in the axis X direction. By arranging in this way, the dimension of the camera unit 500 in the axis Z direction can be reduced.
  • the configuration using the flat magnets with the highest productivity as the pitch magnets 332 and 334 of the pitch magnet unit 330 and the yaw magnets 321 and 323 of the yaw magnet unit 320 has been described. That is, two flat magnets are arranged adjacent to each other such that different magnetic poles (N pole and S pole) face the coil unit 310.
  • the configuration of the magnet in each magnet unit is not limited to this.
  • one arc-shaped magnet 336 may be used with two poles magnetized in the circumferential direction as a magnet of the pitch magnet unit. Further, as shown in FIG.
  • a magnet 337 may be used in which only the surface facing the coil unit 310 has an arc shape and the opposite surface has a flat plate shape. Further, as shown in FIGS. 25A and 25B, similarly, as the magnet of the yaw magnet unit, an arc-shaped magnet 326 or a magnet 327 having an arc shape only on one side may be used. Compared to the configuration of the first embodiment, the arrangement of the arc-shaped magnet and the arc-shaped coil facing each other can improve the driving efficiency because the gap can be made uniform, but the production cost becomes higher. .
  • the present disclosure is applicable to a camera unit having an image blur correction mechanism.
  • the present invention can be applied to a video camera, a wearable camera, a mobile phone with a camera function, a smartphone, and the like.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adjustment Of Camera Lenses (AREA)

Abstract

L'invention concerne une unité (351) d'entraînement en tangage comprenant une unité (330) d'aimant de tangage disposée sur une unité (100) de tangage et une bobine (311) de tangage disposée sur une unité (200) de lacet, l'unité (100) de tangage étant amenée à tourner autour d'un arbre (106) de rotation en tangage par rapport à l'unité (200) de lacet. Une unité (352) d'entraînement en lacet comprend une unité (320) d'aimant de lacet disposée sur une armature extérieure (400) et une bobine (314) de lacet disposée sur l'unité (200) de lacet, l'unité (200) de lacet étant amenée à tourner autour d'arbres (208, 209) de rotation en lacet par rapport à l'armature extérieure (400). Dans une vue suivant la direction de l'axe Y, l'aire définie par la périphérie extérieure de la bobine (311) de tangage chevauche l'aire définie par la périphérie extérieure de la bobine (314) de lacet.
PCT/JP2014/002156 2013-05-22 2014-04-16 Unité de caméra WO2014188656A1 (fr)

Priority Applications (1)

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JP2015518060A JPWO2014188656A1 (ja) 2013-05-22 2014-04-16 カメラユニット

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JP2013107716 2013-05-22
JP2013-107716 2013-05-22

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CN104902169A (zh) * 2015-05-19 2015-09-09 广东欧珀移动通信有限公司 一种旋转摄像头控制方法及终端
JP2019015847A (ja) * 2017-07-06 2019-01-31 日本電産サンキョー株式会社 振れ補正機能付き光学ユニット
US10401590B2 (en) 2017-11-07 2019-09-03 Google Llc Embeddable camera with lens actuator
JP2020204649A (ja) * 2019-06-14 2020-12-24 日本電産サンキョー株式会社 振れ補正機能付き光学ユニット
JP2022185492A (ja) * 2021-06-02 2022-12-14 エスゼット ディージェイアイ テクノロジー カンパニー リミテッド 駆動装置、及び撮像装置
WO2023223945A1 (fr) * 2022-05-16 2023-11-23 アルプスアルパイン株式会社 Dispositif d'entraînement de module, et dispositif optique
WO2023223944A1 (fr) * 2022-05-16 2023-11-23 アルプスアルパイン株式会社 Dispositif d'entraînement de module, et dispositif optique

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JPH07318866A (ja) * 1994-05-25 1995-12-08 Sony Corp レンズ鏡筒の支持機構
JP2007271992A (ja) * 2006-03-31 2007-10-18 Fujifilm Corp レンズ保持装置
JP2010078842A (ja) * 2008-09-25 2010-04-08 Mitsumi Electric Co Ltd カメラの手振れ補正装置
JP2011203476A (ja) * 2010-03-25 2011-10-13 Nidec Sankyo Corp 撮影用光学装置

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Publication number Priority date Publication date Assignee Title
JPH07318866A (ja) * 1994-05-25 1995-12-08 Sony Corp レンズ鏡筒の支持機構
JP2007271992A (ja) * 2006-03-31 2007-10-18 Fujifilm Corp レンズ保持装置
JP2010078842A (ja) * 2008-09-25 2010-04-08 Mitsumi Electric Co Ltd カメラの手振れ補正装置
JP2011203476A (ja) * 2010-03-25 2011-10-13 Nidec Sankyo Corp 撮影用光学装置

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104902169A (zh) * 2015-05-19 2015-09-09 广东欧珀移动通信有限公司 一种旋转摄像头控制方法及终端
CN104902169B (zh) * 2015-05-19 2018-05-29 广东欧珀移动通信有限公司 一种旋转摄像头控制方法及终端
JP2019015847A (ja) * 2017-07-06 2019-01-31 日本電産サンキョー株式会社 振れ補正機能付き光学ユニット
US10401590B2 (en) 2017-11-07 2019-09-03 Google Llc Embeddable camera with lens actuator
JP2020204649A (ja) * 2019-06-14 2020-12-24 日本電産サンキョー株式会社 振れ補正機能付き光学ユニット
JP7237744B2 (ja) 2019-06-14 2023-03-13 日本電産サンキョー株式会社 振れ補正機能付き光学ユニット
JP2022185492A (ja) * 2021-06-02 2022-12-14 エスゼット ディージェイアイ テクノロジー カンパニー リミテッド 駆動装置、及び撮像装置
WO2023223945A1 (fr) * 2022-05-16 2023-11-23 アルプスアルパイン株式会社 Dispositif d'entraînement de module, et dispositif optique
WO2023223944A1 (fr) * 2022-05-16 2023-11-23 アルプスアルパイン株式会社 Dispositif d'entraînement de module, et dispositif optique

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