Push button switch
US5655650A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1994 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Jul 25, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2231/026
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is disclosed a push button switch which comprises rubber contacts each including a contact portion (311), a flared portion (312) formed integrally with the periphery of the contact portion (311), and a ring-shaped portion (313) formed integrally with a lower end of the flared portion (312) and disposed on a printed board (1) wherein the following relation is satisfied: 0.3.ltoreq.d/a.ltoreq.0.7, 4.ltoreq.d/t.ltoreq.6, 1.0.ltoreq.d/h.ltoreq.1.4, 150.degree..ltoreq..theta..ltoreq.165.degree., 1.5.ltoreq.h.ltoreq.3 where t is the thickness of the flared portion (312), d is the length of the flared portion (312), a is an inner diameter of the ring-shaped portion (313), .theta. is an opening angle formed by an inner side surface of the flared portion (312) and a top surface of the printed board (1), and h is the distance between a bottom surface of a conductor (32) and the top surface of the printed board (1). Only the rubber contacts provide a sufficient operational load and a clear click feeling required for a vehicle-mounted switch without using the conventional spring and sliding element. This accomplishes an inexpensive, small-sized vehicle-mounted push button switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.