Lens barrel
US5818647A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1994 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Dec 20, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens barrel includes a fixed frame, lens groups on the inner circumference of the fixed frame movable along an optical axis respective to the fixed frame, three lens holding frames each holding a lens group, a cam frame having bottomed cam grooves coupled with the inner circumference of the fixed frame through cams, bottomed cam grooves crossing each other coupled with the lens holding frames through cams and a bottomed cam groove discontinued on one end surface and continued on another end surface, a key member regulating rotation of the lens holding frames about an optical axis and reinforcing the entire lens barrel, a cam mechanism interposed between the cam frame and lens holding frames for moving the lens holding frames along the optical axis by the rotation of the cam frame about the optical axis with respect to the fixed frame, an internal gear on the cam frame inner circumference, a pinion gear transmitting a drive force from a drive source to the internal gear, flexible printed substrates overlapped in a thickness direction with a uniform width and electrically connected to lens frames moving along the optical axis, being U-shaped and shaped not to overlap each other at …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.