Zoom dial mechanism
US7995288B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2010 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Feb 4, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A zoom dial mechanism includes a zoom dial mounted on a base plate so as to extend through a central hole of the base plate and so as to be turnable, a coil spring mounted on the base plate to urge the zoom dial toward a neutral position, and a push knob mounted in a central hole of the dial. The base plate has a groove concentric with the central hole. The coil spring is mounted in the groove. The mechanism further includes a first rib fixed to the dial so as to abut one end of the coil spring and a second rib fixed to the dial so as to abut the other end of the spring. The spring is compressed by the first rib when the dial is turned clockwise, and the coil spring is compressed by the second rib when the dial is turned counterclockwise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.