Patent ID: 9533603
Date: 2017-01-03
CPC Classifications: A61G,B60N,B60R

Claim:
1. A B-surface seat occupancy sensor unit for detecting an occupancy state of a seat, comprising a support plate having a top surface and a bottom surface, a plurality of bearing elements for fixation of said support plate on seat cushion suspension springs, said bearing elements defining an upper surface of said B-surface seat occupancy sensor unit, which said top surface of said support plate is arranged recessed from; a first foam pad disposed between said bearing elements on said support plate; a recess formed in said top surface of said support plate, underneath said first foam pad; a second foam pad arranged in said recess; a pressure-responsive membrane switch arranged in said recess on said second foam pad, said pressure-responsive membrane switch comprising a first carrier film and a second carrier film spaced from each other by a spacer film, said spacer film having therein an opening defining a cell, said pressure-responsive membrane switch comprising at least two electrodes arranged in facing relationship with each other in said cell on said first and said second carrier film, respectively, in such a way that they are brought closer together, possibly into contact with each other, when pressure is applied on said pressure-responsive membrane switch; wherein said recess has a depth exceeding the total height of said pressure-responsive membrane switch and said second foam pad; and wherein said pressure-sensitive membrane switch projects laterally beyond a first edge of said second foam pad and beyond a second edge of said second foam pad, opposite said first edge.