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Movable body driving mechanism

一种驱动机构、移动体的技术，应用在照相机、机械设备、安装等方向，能够解决增加制造工时等问题，达到缩减制造工时、简化结构的效果

Active Publication Date: 2008-08-13
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the structure disclosed in Patent Document 1 requires a force applying device, which increases the man-hours for manufacturing.

Method used

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Examples

Experimental program
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Embodiment Construction

[0021] [1. Structure of camera device]

[0022] FIG. 1 shows an example of a device including a moving body drive mechanism according to this embodiment. The device shown in FIG. 1 is an imaging device mounted in a digital camera. The imaging device 1 internally includes various lenses such as a continuous zoom lens and a focus lens, an imaging element that converts incident light into an electrical signal and outputs it, and the like. In addition, the imaging device shown in this embodiment is an example, and it is not limited to a digital camera, and it can also be mounted in a video camera etc.

[0023] In the imaging device 1 , the fixed frame 10 , the drive frame 20 and the first lens assembly 40 are arranged coaxially with each other. Furthermore, a gear 11 is disposed near the fixed frame 10 . The gear 11 is driven to rotate by a driving device such as a motor. By rotating the gear 11 in the direction shown by the arrow C, the drive frame 20 and the first lens assem...

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PUM

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Abstract

The present invention is directed to a movable body driving mechanism including a first frame and a second frame that is capable of moving relative to the first frame. The movable body driving mechanism includes a cam groove that is formed in the first frame, and a cam follower that is formed in the second frame and inserted movably in the cam groove. The cam groove includes a plurality of regions having different widths. The cam follower is formed to have a shape with a plurality of outer diameters, and different parts of the cam follower contact an inner lateral surface of the cam groove in each of the plurality of regions. With this configuration, the lateral surface of the cam follower can be made to contact the lateral surface of the cam groove constantly, thus achieving the cam driving without looseness. Also, since the biasing means or the like is not needed, it is possible both to simplify the configuration and to reduce the number of manufacturing steps.

Description

technical field [0001] The invention relates to a mobile body drive mechanism. In particular, it relates to a moving body drive mechanism capable of advancing and retreating a moving body by cam driving. This moving body drive mechanism can be applied to lens barrels and the like. Background technique [0002] In recent years, lenses and lens barrels mounted in imaging devices such as digital cameras and video cameras can move in the direction of the optical axis by a cam mechanism formed in the lens barrel. In order to obtain a high-quality light image, high-precision movement and position control of the lens is required in such an imaging device. [0003] Patent Document 1 (Japanese Unexamined Utility Model Publication No. 5-29013) discloses an urging device that pushes the cam follower in the direction of the cam groove so that the top portion of the cam follower is always in contact with the inclined surface of the cam groove. Thereby eliminating the shaking structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04
CPCG03B11/04G02B7/08G02B7/102Y10T74/1683G03B11/043
Inventor 桑原巧藤中广康
Owner PANASONIC CORP
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