A switching mechanism that is adapted to be incorporated into a seat to sense the presence of an occupant and actuate a switch in response thereto. The switching mechanism includes a switch supported in a housing and having a movable element with an actuating system cooperating with the switch. The actuating system includes an elongated member having one end connected to the support and a free end spaced from the support. The elongated member extends generally parallel to the upper surface of the seat and is deflected from normal in response to an occupant in the seat. An elongated actuating arm cooperates with the element and the free end of the first elongated member to move the element between the first and second positions in response to deflection of the elongated member thereby actuating the switch. The switching mechanism further includes automatic adjustment means to compensate for manufacturing and age variations of the seat.
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