Patent ID: 7487687

Claim:
An occupant load sensor of a seat for a vehicle, comprising: a strain member adapted to be fixed at both ends of a fixing surface provided at one of a floor-side stationary member and a seat-side stationary member with a predetermined distance from the fixing surface in a vertical direction of the seat; a connecting member vertically fixed to the strain member and adapted to be fixed to the other one of the floor-side stationary member and the seat-side stationary member, a strain gauge attached to the strain member; a metal-made bracket fixed to the strain member and having an attachment portion extending in a lateral direction of the seat from the strain member; an amplifier substrate for amplifying a signal transmitted by the strain gauge, one surface of the amplifier substrate being covered by the attachment portion of the metal-made bracket and the other surface thereof being covered by a metal-foil ground pattern; and a resin-made amplifier case fixed to the attachment portion of the metal-made bracket and arranged in parallel to the strain member, the resin-made amplifier case housing the amplifier substrate.