Key switch arrangement for notebook computers
US5770824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1996 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Nov 19, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/52
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key switch for notebook computers, including a bottom frame having two pairs of upright lugs spaced near two opposite sides, a membrane circuit mounted on the bottom frame, a key cap, a rubber cone supported on the membrane circuit and compressed by the key cap to trigger the membrane circuit in producing an electrical signal, a first link having an annular base and two pairs of springy extension rods respectively extended from the periphery of the annular base at two opposite sides and respectively coupled to the key cap and the bottom frame diagonally, and a substantially U-shaped second link pivotably connected to the annular base of the first link at two opposite sides and coupled between the key cap and the bottom frame diagonally for turning relative to the first link to guide the movement of the key cap vertically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.