Key underboard structure of computer keyboard
US5813778A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1997 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Mar 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2229/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key underboard structure adapted to be used in a computer key board assembly having a plurality of movable keys, includes a lower board and an upper board connected together by means of bayonet engagement to sandwich therebetween a rubber pad with an electrical circuit board having a plurality of contacts corresponding to the keys interposed between the rubber pad the lower board. The rubber pad having a plurality of resilient caps received and extending through holes formed on the upper board and to each contain therein a contact pad. A driving device is constituted by a first member having one end pivoted to the upper board to overlap a second member which has an opposite end movably and rotatably received within an L-shaped member formed on the upper board. The second member has an opening to allow the first member to extend therethrough and define a pivotal connection therebetween so as to allow the driving device to be movable between an expanded, cross configuration condition to rest on the cap and a collapsed, overlapped configuration condition so that when the key is depressed, the driving device changes from the expanded condition to the collapsed condition to deform the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.