Lens frame drive apparatus for image pickup apparatus
US8917352B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2013 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | May 2, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0053
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens frame drive apparatus for an image pickup apparatus includes: a first lens frame that moves along a plurality of guide shafts; a second lens frame that moves along the plurality of guide shafts; and a drive shaft with a cam portion for driving the first lens frame, a nut for driving the second lens frame, a feed screw portion threadably connected to the nut, and a driven portion that upon receipt of a driving force from a motor, simultaneously rotates the cam portion and the feed screw portion, formed thereon, wherein the cam portion and the feed screw portion are driven by the nut so that a total amount of movement of the second lens frame is extremely smaller than a total amount of movement of the first lens frame and the second lens frame corrects the amount of movement of the first lens frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.