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JP-7855776-B2 - Imaging device

JP7855776B2JP 7855776 B2JP7855776 B2JP 7855776B2JP-7855776-B2

Inventors

  • 石引 純平

Assignees

  • キヤノン株式会社

Dates

Publication Date
20260508
Application Date
20250924

Claims (20)

  1. The fixing part, A movable part is arranged to be translationally and rotatably relative to the fixed part, A first actuator that generates a force to drive the movable part in a first direction relative to the fixed part, and a second actuator that generates a force to drive in a second direction intersecting the first direction, An imaging device comprising an image sensor held in the movable part, A first restricting means for restricting the movement of the movable part, It has a second restricting means for restricting the movement of the movable part, which is different from the first restricting means described above. The first direction and the second direction are directions parallel to the imaging plane of the image sensor, The second restricting means is provided at a position further from the center of the image sensor than the first restricting means, when viewed from a direction perpendicular to the plane on which the movable part can translate. The first regulating means includes a first hole and a second hole provided in one of the fixed portion and the movable portion, and a first protrusion and a second protrusion provided in the other of the fixed portion and the movable portion, inserted into the first hole and inserted into the second hole, The imaging device is characterized in that the first hole is aligned in the first direction with at least a portion of the second hole when viewed from a direction perpendicular to the plane on which the movable part can translate.
  2. There are multiple first actuators, The imaging apparatus according to claim 1, characterized in that the number of second actuators is less than the number of first actuators.
  3. The second direction is perpendicular to the first direction. The second regulating means has a third projection provided on the fixed portion and protruding toward the movable portion, The imaging apparatus according to claim 1, characterized in that the third projection provided on the fixed portion is arranged such that, when viewed from a direction perpendicular to the plane on which the movable portion can translate, it aligns with the second actuator in the first direction and aligns with the first actuator in the second direction.
  4. There are multiple first actuators, The imaging apparatus according to claim 3, characterized in that the number of second actuators is less than the number of first actuators.
  5. The second direction is perpendicular to the first direction, The second regulating means has a plurality of third protrusions provided on the fixed portion and projecting toward the movable portion, The imaging apparatus according to claim 1, characterized in that the plurality of third protrusions provided on the fixed portion are positioned on both sides of the second actuator in the first direction and on both sides of the first actuator in the second direction, when viewed from a direction perpendicular to the plane on which the movable portion can translate.
  6. The imaging apparatus according to claim 5, characterized in that one of the plurality of third protrusions provided on the fixed portion is arranged such that, when viewed from a direction perpendicular to the plane on which the movable portion can translate, it aligns with the second actuator in the first direction and also aligns with the first actuator in the second direction.
  7. There are multiple first actuators, The imaging apparatus according to claim 6, characterized in that the number of second actuators is less than the number of first actuators.
  8. The imaging apparatus according to any one of claims 1 to 7, characterized in that the first direction is the width direction of the imaging apparatus.
  9. The imaging device according to any one of claims 1 to 7, characterized in that, when the width direction of the imaging device and the long side of the image sensor are parallel, the first hole and the second hole are aligned in the first direction when viewed from a direction perpendicular to the plane on which the movable part can translate.
  10. The fixing part, A movable part is arranged to be translationally and rotatably relative to the fixed part, A first actuator that generates a force to drive the movable part in a first direction relative to the fixed part, and a second actuator that generates a force to drive in a second direction perpendicular to the first direction, An imaging device comprising an image sensor held in the movable part, A first restricting means for restricting the movement of the movable part, It has a second restricting means for restricting the movement of the movable part, which is different from the first restricting means described above. The first direction and the second direction are directions parallel to the imaging plane of the image sensor, The second restricting means is provided at a position further from the center of the image sensor than the first restricting means, when viewed from a direction perpendicular to the plane on which the movable part can translate. The second regulating means has a plurality of protrusions provided on the fixed portion and projecting toward the movable portion, The imaging device is characterized in that the plurality of protrusions provided on the fixed portion are arranged on both sides of the second actuator in the first direction, and are also arranged on both sides of the first actuator in the second direction, when viewed from a direction perpendicular to the plane on which the movable portion can translate.
  11. There are multiple first actuators, The imaging apparatus according to claim 10 , characterized in that the number of second actuators is less than the number of first actuators.
  12. The imaging apparatus according to claim 10, characterized in that one of the plurality of protrusions provided on the fixed portion is arranged such that, when viewed from a direction perpendicular to the plane on which the movable portion can translate, it is aligned with the second actuator in the first direction and aligned with the first actuator in the second direction.
  13. There are multiple first actuators, The imaging apparatus according to claim 12 , characterized in that the number of second actuators is less than the number of first actuators.
  14. The fixing part, A movable part is arranged to be translationally and rotatably relative to the fixed part, A first actuator that generates a force to drive the movable part in a first direction relative to the fixed part, and a second actuator that generates a force to drive in a second direction perpendicular to the first direction, An imaging device comprising an image sensor held in the movable part, A first restricting means for restricting the movement of the movable part, A second restricting means for restricting the movement of the movable part, which is different from the first restricting means described above, It has, The first direction and the second direction are directions parallel to the imaging plane of the image sensor, The second restricting means is provided at a position further from the center of the image sensor than the first restricting means, when viewed from a direction perpendicular to the plane on which the movable part can translate. The second regulating means is provided on the fixed portion and has a protruding portion that protrudes toward the movable portion side, The imaging device is characterized in that the protruding portion provided on the fixed portion is arranged such that, when viewed from a direction perpendicular to the plane on which the movable portion can translate, it is aligned with the second actuator in the first direction and aligned with the first actuator in the second direction.
  15. There are multiple first actuators, The imaging apparatus according to claim 14 , characterized in that the number of second actuators is less than the number of first actuators.
  16. The fixing part, A movable part is arranged to be translationally and rotatably relative to the fixed part, An actuator that generates a force to drive the movable part relative to the fixed part, An imaging device comprising an image sensor held in the movable part, A first restricting means for restricting the movement of the movable part, It has a second restricting means for restricting the movement of the movable part, which is different from the first restricting means described above. The movable part is capable of translational movement in the height and width directions of the imaging device. The second restricting means is provided at a position further from the center of the image sensor than the first restricting means, when viewed from a direction perpendicular to both the height direction and the width direction. The first regulating means includes a first hole and a second hole provided in one of the fixed portion and the movable portion, and a first protrusion and a second protrusion provided in the other of the fixed portion and the movable portion, inserted into the first hole and inserted into the second hole, An imaging device characterized in that, when viewed from a direction perpendicular to both the height direction and the width direction, the first hole is aligned with the second hole in the width direction, and the position of the first hole in the height direction is the same as the position of at least a portion of the second hole in the height direction.
  17. The imaging apparatus according to claim 16, characterized in that the height direction and the width direction are parallel to the imaging surface of the image sensor.
  18. The actuator is The first actuator and The imaging apparatus according to claim 16 or 17, further comprising a second actuator which generates a driving force in a direction different from that of the first actuator.
  19. There are multiple first actuators, The imaging apparatus according to claim 18, characterized in that the number of second actuators is less than the number of first actuators.
  20. The second regulating means has a third projection provided on the fixed portion and protruding toward the movable portion, The imaging apparatus according to claim 18, characterized in that the third projection provided on the fixed portion is arranged such that, when viewed from a direction perpendicular to both the height direction and the width direction, it is aligned with the second actuator in the width direction and aligned with the first actuator in the height direction.

Description

This invention relates to an imaging device . A drive device is known that moves a movable part in a plane relative to a fixed part. One configuration for generating the driving force to drive the movable part is called the voice coil motor (VCM) system. In the VCM system, a magnet is placed on one of the movable and fixed parts, and a coil is placed on the other. Driving force is generated by energizing the coil within the magnetic circuit formed by the magnet. An example of the application of such a drive device is the image stabilization mechanism mounted on an imaging device. In an image stabilization mechanism, an image sensor or image stabilization lens is mounted on a movable part, and the movable part is driven to cancel out the detected blur based on the amount of blur detected by a predetermined sensor. In particular, an image stabilization mechanism with an image sensor mounted on the movable part can correct rotation around an axis perpendicular to the imaging plane of the image sensor (the imaging optical axis), and therefore offers superior image stabilization performance compared to an image stabilization mechanism with an image stabilization lens mounted on the movable part. In such drive devices, a restricting mechanism is provided to prevent the movable part from detaching from the fixed part. In drive devices capable of rotational movement around the imaging optical axis, such as the image stabilization mechanism of an imaging device, this restricting mechanism must be positioned so as not to hinder the rotational movement of the movable part. Furthermore, in such image stabilization mechanisms, multiple balls are typically arranged to roll between the movable and fixed parts to reduce contact resistance and enable smooth operation. A protective enclosure is provided to prevent the balls from flying out in a direction parallel to the rolling surface. Additionally, the movable and fixed parts are each provided with a contact portion and a contacted portion to restrict the movement of the movable part relative to the fixed part. For example, Patent Document 1 discloses a technique for image stabilization devices that move lens groups using a two-axis drive mechanism, in which the ball position is reset before shooting to prevent the ball from contacting the enclosure during actual use. Furthermore, Patent Document 1 describes the provision of a movable mechanical end that restricts the movement of the movable part. Patent No. 3969927 This figure shows a schematic configuration of an imaging device according to an embodiment of the present invention.This is an exploded perspective view of the first image stabilization unit.This is an exploded perspective view of the movable parts that make up the first image stabilization unit.This diagram illustrates the translational and rotational motion of an object on a plane.This figure shows the relationship between the distance from the center of rotation, the maximum displacement, and the maximum rotation angle.This diagram illustrates a configuration that restricts the relative position of a movable part with respect to a fixed part.This is another diagram illustrating a configuration that restricts the relative position of a movable part with respect to a fixed part.This is a schematic diagram illustrating the relationship between the ball and the enclosure when the movable part moves.This diagram illustrates the relationship between the distance from the optical axis and the inner diameter of the enclosure.This is the first diagram illustrating the first reset operation of the ball.This is the second diagram illustrating the first reset operation of the ball.This is the first diagram illustrating the second reset operation of the ball.This is the second diagram illustrating the second reset operation of the ball. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Here, a configuration in which the drive device according to the present invention is applied to an image blur correction device for an imaging device will be described. Figure 1 shows a schematic configuration of an imaging device 10 according to an embodiment of the present invention. The imaging device 10 is a so-called mirrorless digital camera, comprising an imaging device body 10a (hereinafter referred to as "body unit 10a") and a lens barrel 10b that is detachable from the body unit 10a. The main body 10a comprises an image sensor 11 having an imaging surface 11a, a base member 13c, a main body side mount member 13a, a camera control unit 14, a first image stabilization control unit 15a, a first vibration detection unit 16a, an image processing unit 17, and a first image stabilization unit 20. The lens barrel 10b comprises an imaging optical system 12 including an image stabilization lens 12b, a lens side mount member 13b, a second image stabilization control unit 15b, a second vibration detection unit 16b, and a