Canceling structure of combination switch
US6660951B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2002 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Oct 16, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/425
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A canceling structure of a combination switch is disclosed, which ensures the returning moment of a cancel cam without increasing the size of a spring. A cancel cam 20 placed on a swing block that can be rotated with a control lever includes pressure contact surfaces 22 on a plane passing through the shaft center of an upper shaft 9b, and the upper shaft 9b is guided along a long hole 9b of a cover. An elastic contact material 30 has pressure surfaces 32 to be brought into contact with the pressure contact surfaces of the cancel cam, and is biased toward the cancel cam along a guide 6d by a coil spring 11 inserted into a blind hole 12b. The pressure surfaces 32 have a shaft-escaping recessed portion 34 forming a predetermined gap between them and the upper shaft 9b when brought into contact with the pressure contact surfaces of the cancel cam. Since the pressure contact surfaces pass through the rotating shaft center, the angel from the shaft center to a contact point with the pressure surface 32, thereby increasing a returning moment by the pressure of the elastic contact material. Also, since the elastic contact material is long, the movement along the guide becomes smooth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.