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Actuator and camera device

A technology for an actuator and a holding member, which can be applied to electromechanical devices, cameras, projection devices, etc., and can solve the problems of unstable rotation control system and decreased positioning accuracy of rotation control.

Inactive Publication Date: 2020-06-16
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The torque ripple caused by this stick-slip has a sawtooth-like sharp waveform that excites (i.e., resonates) the natural vibrations of rigid bodies coupled together during static periods, temporarily causing the rotational control system to become unstable
In addition, this phenomenon also occurs when the moving object is about to come to a standstill, thus constituting a factor that ultimately leads to a decrease in the positioning accuracy of the rotation control

Method used

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  • Actuator and camera device
  • Actuator and camera device
  • Actuator and camera device

Examples

Experimental program
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Effect test

Embodiment 1

[0025] will refer to figure 1 Part A of the to Figure 13 A camera device according to this embodiment is described. figure 1 Part A of is along the figure 2 A cross-sectional view taken on the plane X1-X1 shown in part B of . figure 1 Part B of the figure 1 An enlarged view of the main part D1 shown in part A.

[0026] The camera device 1 may be, for example, a portable camera, and includes such as figure 2 Part A of and image 3 Actuator 2 and camera module 3 are shown.

[0027] The camera module 3 includes an image sensor, a lens for forming a subject image on an image capturing plane of the image sensor, and a lens barrel for holding the lens. The camera module 3 converts video generated on the image capture plane of the image sensor into electrical signals. In addition, a plurality of cables for transmitting electrical signals generated by the image sensor to an external image processor circuit (as an exemplary external circuit) are electrically connected to the...

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Abstract

Provided are an actuator and a camera device, said actuator having a movable unit that can smoothly start moving in the initial rotational motion of the movable unit and can also be immobilized. The actuator (2) is provided with: a movable unit (10) for holding an object to be driven; and a stationary unit (20) for rotatably fixing the movable unit (10). A supporting structure for supporting the movable unit (10) with respect to the stationary unit (20) has: a spherical body (46); and a movable side holding member (45) and a stationary side holding member (502) for sandwiching the spherical body (46). Spaces (452, 504) for the spherical body (46) to roll so that the central position thereof moves with respect to the movable side holding member (45) and the stationary side holding member (502) are present.

Description

technical field [0001] The present disclosure relates generally to actuators and camera devices, and more particularly to actuators and camera devices configured to drive an object to be driven in rotation. Background technique [0002] An actuator for turning a camera is known as an actuator for turning an object to be driven. For example, Patent Document 1 discloses a camera driving device (camera device) having a capability of rotating a camera unit in three axis directions. The camera drive device disclosed in Patent Document 1 includes: a movable unit including a convex partial sphere on its outer surface; and a fixed unit having a concave portion at least partially loosely fitted in in the recess. In the recess, the surface of the convex part-sphere and the recess make point contact or line contact with each other, and the recess causes the movable unit to rotate around the center of the convex part-sphere by electromagnetic drive. [0003] In the camera drive devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/173G03B15/00H04N5/222
CPCH02K5/173G03B17/561G08B13/1963G02B27/646G03B30/00G02B7/02G03B5/00G03B2205/0007H04N23/54H04N23/58
Inventor 龟山泰明富田浩稔稻田真宽铃木活伸
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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