Forward/backward rotation switching mechanism
US8981244B2 · kind B2 · utility
4Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2012 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Oct 15, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/063
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a forward/backward rotation switching mechanism, comprising: a cover, a turntable, a terminal-fixing body, a first contact terminal, and a second contact terminal. In the present invention, a plurality of dust-off trenches are especially formed on the peripheral edges of the turntable for preventing from the dust accumulation between the turntable and a cover; therefore, even if the forward/backward rotation switching mechanism is used in an environment having a lot of dust, the turntable can still be turned around because the dust is ruled out by the dust-off trenches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.