Short-stroke dome-shaped disc film spring
US5720472A · kind A · utility
9Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Aug 9, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2227/026
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A short-stroke dome-shaped disc film spring comprising a dome-shaped portion and a skirt figure portion, wherein the cross section of the skirt figure portion rises in a line, the rise angel is inclined inward between 40 degrees and 60 degrees, the height of the skirt figure portion is between 0.2 mm and 0.4 mm, and the dome-shaped portion and the skirt figure portion are formed from a resin film of thickness 75 to 200 .mu.m. The dome-shaped film spring has a short stroke at which a feeling of a click is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.