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Lens driving unit, and lens apparatus and image pickup apparatus including the same

一种透镜驱动、驱动单元的技术，应用在放映装置、洗印装置、光学元件等方向，能够解决成本增加、校正透镜有偏差、部件形状复杂化等问题，达到简化形状、减小随时间的变化的效果

Active Publication Date: 2013-05-08
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the locked state, due to the play of the locking element in the radial direction, it is determined that the posture of the correction lens is deviated relative to the optical axis, thereby deteriorating the optical performance
In addition, the positioning accuracy of the correction lens deteriorates over time due to wear or deformation of the locking elements during long-term use
In addition, since the abutting portion needs to be provided, the shape of the parts is complicated, leading to an increase in cost

Method used

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  • Lens driving unit, and lens apparatus and image pickup apparatus including the same
  • Lens driving unit, and lens apparatus and image pickup apparatus including the same
  • Lens driving unit, and lens apparatus and image pickup apparatus including the same

Examples

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no. 1 example

[0021] In the following, refer to Figure 1-5 , to describe the lens driving unit according to the first embodiment of the present invention in detail.

[0022] figure 1 is an exploded perspective view of the lens driving unit according to the first embodiment. Figure 2A is a front view of the lens driving unit when the image stabilization function is being performed (hereinafter referred to as "image stabilization state"). Figure 2B is a front view of the lens driving unit when image stabilization is not performed (hereinafter referred to as "non-image stabilization state"). exist Figure 2A and 2B In , for easy understanding of the structure, a fixed unit and a ball described later are indicated by a solid line, and a movable unit is indicated by a dotted line. image 3 yes Figure 2A A schematic top view of , showing the drive unit and its surrounding structures in a simplified manner. Figure 4 yes image 3 A partial enlargement of the . Note that a generally kn...

no. 2 example

[0038] In the following, refer to Figure 6A , Figure 6B and Figure 7 A second embodiment of the present invention is described in detail.

[0039] Note: In this embodiment, the driving unit has a different structure from the first embodiment. Other identical parts are denoted by the same reference numerals or symbols, and descriptions thereof are omitted.

[0040] Instead of the attraction yoke 22 and the drive coil 23 of the fixed unit 2, the drive unit 8 of this embodiment includes three vibration wave motors 63 and three attraction magnets 64, and the vibration wave motors 63 surround the light of the correction lens 31 by means of a leaf spring 62. The shaft positions are fixed on the holding plate 61 approximately every 120 degrees. In addition, instead of the permanent magnet 33 and the backing yoke 34 of the movable unit 3 in the first embodiment, the movable unit 7 of this embodiment includes: a slider 72 which is kept in contact with the vibration wave motor 63...

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Abstract

A lens driver moving a lens perpendicularly to optical axis, the lens driver including: fixed member; movable member holding the lens; spacer interposed therebetween with the members being movable to each other perpendicularly to optical axis; biasing unit biasing the movable member toward the fixed member; detector for detecting position of the movable member relative to the fixed member in plane perpendicular to optical axis; driver driving the movable member relative to the fixed member perpendicularly to optical axis; controller controlling the driver based on position of the movable member; and range definer defining: movable position having large movable range between the members in the perpendicular plane; and fixed position having small movable range between the members in the perpendicular plane based on rotation position about optical axis where sliding friction is generated between the spacer and one of the members, or between the driving unit and the movable member.

Description

technical field [0001] The present invention relates to a lens driving unit including a driving unit. Background technique [0002] A lens device is generally known which includes a correction lens movable in translation in a plane perpendicular to the optical axis to suppress image shake; also known is a device including a holding mechanism which holds A mechanism is used to limit and fix the movement of the movable part, including the corrective lens, when not performing image stabilization. [0003] Japanese Patent No. 4,011,576 discloses a device in which, when an image stabilization action is not performed, a movable member including a correction lens is rotated so that a locking member accommodating portion of the fixed member and a locking member of the movable member are engaged at a predetermined position , thus locking the movable part in a position matching the optical axis. In this position, the movable part is biased towards the locking element housing by magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/64G03B5/02
CPCG03B2205/0015G03B2205/0053G03B5/02G02B27/646
Inventor 三浦敦
Owner CANON KK