US Patent 7182299 Fixing tool

In a fixing tool, a fitting portion includes a post, clamp plate, elastic press piece, and locking/unlocking piece. The clamp plate can be inserted through a fitting hole from an upper surface side of a chassis. The elastic press piece is elastically abutted against the upper surface of the chassis. The locking/unlocking piece is formed at part of the elastic press piece. When the clamp plate is inserted through the fitting hole and moved in one direction along a lower surface of the chassis, the locking/unlocking piece engages with an edge of the fitting hole opposite the direction of movement.