Back lighted membrane keyboard with components being secured together by subjecting to ultrasonic welding
US8247714B2 · kind B2 · utility
12Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2010 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Feb 25, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49105
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A back lighted membrane keyboard includes a key housing, a membrane, a key support plate, a membrane circuit board, an insulative plate, a light guide membrane plate, and a base plate. The key housing, the membrane, the key support plate, the membrane circuit board, the insulative plate, and the light guide membrane plate are aligned by inserting stems thereinto. Eventually, these components are subjected to ultrasonic welding to be bound together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.