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Drive apparatus, lens unit, and camera

一种驱动装置、透镜单元的技术,应用在安装、电气元件、光学元件等方向,达到减少能量损耗、提高驱动效率、实现小型化的效果

Inactive Publication Date: 2005-07-20
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, with such an electromagnetic motor driving device, although a large driving force can be obtained, a large electromagnetic motor must be provided outside the lens unit, and there is a problem of increasing the size of the lens unit.

Method used

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  • Drive apparatus, lens unit, and camera
  • Drive apparatus, lens unit, and camera
  • Drive apparatus, lens unit, and camera

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0081] Hereinafter, the lens unit 10 according to the first embodiment of the present invention will be described. Also, the lens unit 10 is mounted on the camera or manufactured integrally with the camera.

[0082] In addition, in addition to the above-mentioned lens unit 10, the camera also has: a recording medium for recording images formed by the lenses 30, 40, 50 constituting the lens unit 10; a drive device 1 for driving the lenses 30, 40, 50; and an enclosure housing all these structures. However, illustration of the camera, recording medium, and housing is omitted.

[0083] figure 1 is a perspective view of the lens unit 10 seen from the upper right, figure 2 It is a perspective view of the lens unit 10 seen from the upper left. image 3 (A) and (B) are operation diagrams of the cam member 60 . Figure 4 (A) and (B) are operation diagrams of the cam member 70 . Figure 5 It is an enlarged view of the vibrating body 66 that drives the cam member 60 .

[0084] ex...

no. 2 Embodiment approach

[0129] Second, according to Image 6 with Figure 7 , the lens unit 110 according to the second embodiment of the present invention will be described.

[0130] In the lens unit 110 , in the driving device 1 , the shapes of the cam members 160 and 170 and the contact positions of the vibrators 66 and 76 are different from those of the lens unit 10 of the first embodiment described above. The differences will be described in detail below.

[0131] exist Image 6 In (A), (B), the cam member 160 is supported by the outer surface portion 25A of the casing 20, and is generally formed in a fan shape, and a rotation shaft 61 as a rotation center is formed on one end, and a cam member along the cam is formed on the other end. The arc-shaped protrusion 165 in the direction of rotation of the member 160.

[0132] Also, the cam member 170 is supported by the other outer surface 25B of the housing 20, and is also substantially fan-shaped, with the rotation shaft 71 as the center of rot...

no. 3 Embodiment approach

[0145] Second, according to Figure 8 , Figure 9 as well as Figure 10 , the lens unit 210 according to the third embodiment of the present invention will be described.

[0146] In the lens unit 210 , the shape of the housing 90 , the shapes of the cam members 260 and 270 , and the shapes of the protruding portions 265 and 275 of the cam members 260 and 270 are different from those of the above-described embodiments. The differences will be described in detail below.

[0147] Figure 8 is a cross-sectional view showing the lens unit 210 of the present invention. Figure 9 (A) and (B) are operation diagrams of the cam member 260 . Figure 10 (A) and (B) are operation diagrams of the cam member 270 .

[0148] exist Figure 8 to Figure 10 Among them, a cam member 270 abutting on the vibrating body 76 is provided on one side of the housing 90 , and a cam member 260 abutting on the vibrating body 66 is provided on the other side of the housing 90 . Furthermore, the vibrati...

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PUM

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Abstract

A drive apparatus sufficiently improves drive efficiency while reducing device size, and lens unit and camera using the drive apparatus. A cam member (60) is driven rotationally by vibration of an oscillator 66 in the lens unit (10), and this rotation of the cam member (60) causes lenses (40, 50) to move forward and back. A complicated drive mechanism using an electromagnetic motor and incumbent gears or cam rings is therefore unnecessary. Construction is thereby simplified and the device can be made compact. Driving the lenses (40, 50) by means of a cam member (60) minimizes energy loss due to friction, and thus sufficiently improves drive efficiency.

Description

technical field [0001] The invention relates to a driving device, a lens unit and a photographing device. Specifically, it relates to a lens unit that has a drive device that drives a driven member by using a vibrating body of a piezoelectric element, and a lens drive mechanism that drives a lens using the drive device, and is installed in a camera, digital still camera, video camera, Among microscopes and binoculars, etc. Furthermore, it also relates to imaging devices, such as a camera, a digital still camera, a video camera, etc. which have a lens drive mechanism which drives a lens by the said drive device. Background technique [0002] Patent Document 1 Japanese Unexamined Patent Application Publication No. H10-161001 (pages 3 to 4) [0003] Patent Document 2 JP-A-7-274546 (pages 3-4) [0004] Patent Document 3 JP-A-8-66068 (pages 3-4) [0005] Patent Document 4 JP-A-4-69070 (pages 3 to 5) [0006] Conventionally, as a driving device for driving a movable member co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04G02B7/08G02B7/10H02N2/00H10N30/20H10N30/88
CPCG02B7/102H01L41/053G02B7/08H01L41/0906H02N2/103H02N2/004H02N2/126G02B13/0035G02B13/009G03B2205/0061H10N30/88H10N30/202
Inventor 本田克行长尾昭一向山浩行清水章弘小松朗
Owner SEIKO EPSON CORP