Seat occupancy sensor unit for seat with spring suspension or seat pan

摘要

A pressure-responsive 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) defining an upper surface (18) of the pressure-responsive seat occupancy sensor unit, which upper surface the top surface of the support plate is arranged recessed from, a foam pad (22) disposed between the spacer elements on the support plate, a recess (24) formed in the top surface of the support plate, underneath the foam pad, and a pressure-responsive membrane switch (26) arranged in the recess. The recess has a depth exceeding the thickness of the pressure-responsive membrane switch. The foam pad is configured such that, upon it being compressed by application of pressure exceeding a certain threshold, it deforms so as to penetrate into the recess and activates the pressure-responsive membrane switch.

主权项

1. A pressure-responsive 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 pressure-responsive seat occupancy sensor unit, wherein said top surface of said support plate is arranged recessed from said upper surface; a foam pad disposed between said bearing elements on said support plate; a recess formed in said top surface of said support plate, underneath said foam pad; and a pressure-responsive membrane switch arranged in said recess, wherein said recess has a depth exceeding the thickness of said pressure-responsive membrane switch.