Focusing device and a telescopic tube module thereof
US7339729B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Sep 20, 2005 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | May 24, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A focusing device and a telescopic tube module thereof are for use with optical equipment. The focusing device has a base module and a telescopic tube module. The base module has a housing, a shaft, and at least two bearings. The telescopic tube module has a tubular body, a bottom reinforced member, and an upper reinforced member. The bottom reinforced member is a reinforced board. The upper reinforced member includes at least two reinforced strips. The tubular body is slidably disposed in the housing. The shaft supports the bottom reinforced member. The at least two bearings support the upper reinforced member. When the shaft drives the tubular body to move, the stability and the precision of the focusing device are improved, and the durability of the tubular body is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.