Push switch using a heart shaped cam
US9514901B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2013 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Jul 6, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H13/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heart cam mechanism of a switch includes a cam groove, which includes a heart cam and surrounding cams, and a lock pin. The heart cam has a concave part, a first vertex opposite the concave part, and second and third vertices on a concave-part side. While the switch is in a locked state, an upper end part of the lock pin is engaged with the concave part of the heart cam, and is positioned at a locking position. While the switch is pressed, the upper end part slides while pushing against a bottom surface of the cam groove located outside the heart cam, and moves along a heart-shaped path, which is depressed at the locking position. This configuration prevents an end part of the lock pin from moving in a reverse direction even when a step-like part of the bottom surface of the cam groove is worn out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.