Lens barrier device
US8021061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2010 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Aug 25, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens barrier device 10 includes a pair of lens barrier members 12, 12 having a pair of toggle-lever engagement bosses 12e, 12e, a ring 14 having a pair of recesses 14d, 14d formed on its outer circumferential part, a pair of toggle levers 15, 15 having a pair of triangular cam part 15d, 15d and a base frame 17 supporting the toggle levers 15, 15, and a pair of torsion springs 16, 16 engaged with the toggle levers 15, 15 and the base frame 17. In assembling, the toggle-lever engagement bosses 12e, 12e are freely fitted into the recesses 14d, 14d, respectively. With forward-reverse rotating of the ring 14, by allowing the toggle-lever engagement bosses 12e, 12e to slide along the triangular cam part 15d, 15d while pressing the bosses 12e, 12e through respective ends of the recesses 14d, 14d, the pair of lens barrier members 12, 12 are held in their closed or opened condition by the toggle levers 15, 15 and the torsion springs 16, 16.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.