Lens drive unit, lens barrel, and image forming device
US7876508B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 2009 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Aug 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens drive unit is configured to move a lens holding frame to a desired position by the engagement between a cam groove of a rotary cylinder and a cam follower of the lens holding frame. The lens drive unit includes a second linearly-moving guide cylinder arranged between the lens holding frame and a first linearly-moving guide cylinder. The second linearly-moving guide cylinder can be moved in the optical a direction with rotation of the rotary cylinder by the engagement of a cam follower of the second linearly-moving guide cylinder with a second cam groove of the rotary cylinder. The lens holding frame is guided in the optical axis direction by the second linearly-moving guide cylinder and moved in the optical axis direction with rotation of the rotary cylinder by the engagement of a cam follower of the lens holding frame with a first cam groove of the rotary cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.