Switching mat for a telephone or radio handset

Details Switching mat for a telephone or radio handset Switching mat for a telephone or radio handset

1995-12-08

1998-02-10

Bost, Dwayne

Telephonic communications

Terminal

379428, 379433, H04M 100

Patent

active

057177538

ABSTRACT:
A handset for telephone and radio systems usually consists of a casing which contains a microphone, a loudspeaker, a printed circuit board carrying the electronic components, and normally also a switching mat made of a rubber type material (e.g. silicone), which switching mat is integrated into a keypad such that the keys of the keypad act on this switching mat to close switching contacts. According to the invention, the switching mat comprises a cavity corresponding to the external shape of the loudspeaker such that the loudspeaker can be introduced into this cavity either from the rear or from one of the adjacent front ends of the switching mat. This results in a significant simplification of the assembly process, as well as a major improvement in shock and vibration protection.

REFERENCES:
patent: D306291 (1990-02-01), Watanabe et al.
patent: 4791526 (1988-12-01), Breu et al.
patent: 5371790 (1994-12-01), Nevo et al.
patent: 5461672 (1995-10-01), Enokido et al.

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