| 摘要 |
<p>A pressure actuated switching apparatus comprises an elastomeric first conductive layer (17b), a second conductive layer (12), a layer of electrically conductive compressible piezoresistive material (14) and at least one electrically insulative spacer element (13). Said layer of electrically conductive compressible piezoresistive material (14) has first and second surfaces, the first surface being in electrically contacting relationship with the elastomeric first conductive layer (17b). The piezoresistive Material (14) has an electrical resistance which varies in response to the amount of force applied thereto. The at least one electrically insulative spacer element (13) has a thickness of from about 1/32 inch to about 1/4 inch. It is positioned between the second surface of the compressible piezoresistive material (14) and the second conductive layer (12). The spacer element (13) possesses a plurality of openings (13a), each opening (13a) having a diameter of from about 1/16 inch to about 1/2 inch. In response to a force applied thereto the compressible piezoresistive material (14) disposes itself through at least some of the openings (13a) of the spacer element (13) to make electrical contact with the second conductive layer (12). <IMAGE></p> |
