Touch-to-action structure of a key signal
US5981890A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Oct 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2213/002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A touch-to-action structure of a key signal comprises a lower thin film circuit board, an upper thin film circuit board and a spacer. Wires and a plurality of electric connections are formed on the upper surface of the lower thin film circuit board. The upper thin film circuit board are arranged above the lower thin film circuit board, Wires and a plurality of electric connections are formed on the lower surface of the upper thin film circuit board. The spacer is arranged between the upper and lower thin film circuit boards, the spacer being installed with a plurality of vent holes correspondent to the electric connections of the upper and lower thin film circuit boards. At least one vent hole is installed in each outer rim of the electric connections of the upper in film circuit board and the lower thin film circuit board for venting air. As the key is clicked continuously and rapidly, the air still can effectively vented and sucked so that the touch-to-action hat still can operate normally. Therefore, a suction effect is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.