EP 0087918 A1 19830907 - Keyboard Switch.
Title (en)
Keyboard Switch.
Title (de)
Tastaturschalter.
Title (fr)
Interrupteur de clavier.
Publication
Application
Priority
- GB 8205630 A 19820225
- GB 8211510 A 19820421
Abstract (en)
A keyboard switch (40) includes a portion of a sheet (21) of moulded silicone rubber having raised sides (22, 22 min ) supporting a key button (23). A projection (41) on one of the raised sides (22 min ) bears on membrane switch electrical contacts (42) when the key button (23) is depressed. One raised side (22) has a geater length and thickness than the other side (22 min ) and includes a ridge (27) at the base so as to provide a cantilever action pivoted at the ridge when the switch is operated. The cantilevered side (22 min ) provides a positive locating movement and the more resilient side (22) provides a "snap" action to the switch. In another embodiment (not shown) the electrical contacts are positioned above a surface having a recess with a central pip in the recess; when the key button is depressed, the electrical contacts are compressed between the pip and the bearing portions of the key button (or associated projection).
IPC 1-7
IPC 8 full level
H01H 13/705 (2006.01)
CPC (source: EP)
H01H 13/705 (2013.01); H01H 2215/022 (2013.01); H01H 2221/016 (2013.01)
Citation (search report)
- [Y] FR 2442502 A1 19800620 - OREGA CIFTE
- [Y] US 3932722 A 19760113 - OBATA AKIRA, et al
- [Y] FR 2457006 A1 19801212 - ROGERS CORP [US]
- [A] GB 2077464 A 19811216 - CITIZEN WATCH CO LTD
- [A] US 4129758 A 19781212 - GILANO MICHAEL N, et al
- [XP] DE 3044414 A1 19820624 - LICENTIA GMBH [DE]
- [A] GB 2039417 A 19800806 - MAAG GUMMI
- [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 23, no. 9, February 1981, pages 4172-4178, New York, USA
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 83300940 A 19830223