| 摘要 |
A high sensitivity door edge switch used with a door having an edge for response to a low unit pressure applied over a large portion of the door edge. The door switch comprise an inner element extending along the edge of the door having one face proximate the door edge, a resiliently compressible perforate spacer in facing relation with the other face of the inner element, the spacer including a plurality of spaced perforations extending generally perpendicular to said inner element, and having a relatively greater elastic compressibility than said inner element. A substantially imperforate outer element is in facing relation with the spacer remote from said inner element, said outer element having a relatively greater elastic compressibility than said spacer, said outer element being elastically deformable into the spacer perforations toward the inner element upon low unit pressure being applied over a large portion of the outer element and a pair of relatively flexible conductive elements located on opposite sides of said spacer and positioned respectively between the spacer and said inner and outer elements, said conductive elements being in spaced confronting relation through said spacer perforations in the absence of said low unit pressure and upon application of said low unit pressure to said outer element, at least one of said conductive elements deflecting into engagement with the other of said conductive elements by the elastic deformation of said outer element into all the spacer perforations encompassed by said large portion of the door edge.
|
