Fixing structure for an auxiliary lens of cameras
US7853137B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2008 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Aug 7, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A means for fixing an auxiliary lens to the outside of the original lens of a camera body includes an annular base, an annular lens mount and an annular abutting base. The inner edge of the base protrudes upwardly to form a wall. The wall protrudes outwards to form a plurality of blocks. The inner edge of the lens mount is provided with a plurality of notches corresponding to the blocks. A first end surface of the abutting base extends to form a plurality of L-shaped elastic arms corresponding to the blocks and notches. The L-shaped elastic arm extends obliquely from the first end surface toward the lens mount. A gap is formed between the L-shaped elastic arm and the abutting base, so that the L-shaped elastic arm can be bent inwardly when compressed. When the camera body is combined with the auxiliary lens by rotation, the blocks pass through the notches to abut and compress the L-shaped elastic arms. At the same time, the L-shaped elastic arms generate a reaction force, thereby enhancing the tightness between the camera body and the auxiliary lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.