| 摘要 |
A pressure activated switching device includes a first conductive layer, a second conductive layer spaced apart from the first conductive layer so as to define a planar space therebetween, and a standoff layer of electrically insulative material positioned between the first and second conductive layers. The standoff layer includes at least one opening for permitting movement therethrough of one or the other of said first and second conductive layers for the purpose of making electrical contact between them. The opening is defined by an interior edge of the standoff which laterally circumscribes an interior space, the opening including at least one linear, finger-like projection extending laterally from the interior edge into the interior space. Optionally, the switching device can include a piezoresistive material positioned between a conductive layer and the standoff. The pressure activated switching device can be used, for example, in a safety sensing edge system for a movable door.
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