Abstract: A keypad (10) comprises a membrane having a plurality of switch actuating portions (41). The keypad (10) further comprises key portions (44) corresponding to said switch actuating portions (41) and located on an opposite side of the membrane to said switch actuating portions (41) and a plurality of switch elements (18) located beneath said switch actuating portions (41) of the membrane. The membrane extends across the keypad (10) and provides a water resistant barrier between the switch elements (18) and the key portions (44) of the membrane. Removable buttons (40) are provided for the keypad (10) and are attached to the key portions (44) of the membrane, whereby pressing of the buttons (40) causes flexing of the membrane and actuation of the switch elements (18) by the switch actuating portion of the membrane.
Type:
Grant
Filed:
April 23, 1993
Date of Patent:
November 22, 1994
Assignee:
Motorola, Inc.
Inventors:
Hans-Jurgen Schmidt, Klaus Lindner, Theo L. Eversloh