SEAT OCCUPANCY SENSOR UNIT AT A LOWER B-SURFACE SIDE OF A SEAT CUSHON

摘要

A B-surface seat occupancy sensor unit (10) comprises a support plate (12) having a top surface (20) and a bottom surface, a plurality of spacer elements (14), which define an upper surface (18) of the unit. The top surface of the support plate is arranged recessed the upper surface. A first foam pad (22) is disposed between the spacer elements on the support plate. A recess (24) formed in the top surface of the support plate, underneath the first foam pad, accommodates a second foam pad (23) carrying a pressure-responsive membrane switch (26). The recess has a depth exceeding the total height of the pressure-responsive membrane switch and the second foam pad. The pressure-sensitive membrane switch projects laterally beyond opposite edges of the second foam pad.