Patent ID: 7661760
Filing Date: 2010-02-16
Classification: B60N

Abstract:
1. A device for a vehicle seat that includes a seat cushion and a seat back that turns around a part in the vicinity of a rear end of the seat cushion so as to be changeable between a predetermined raised state and a forwardly folded state where it is inclined and folded toward the seat cushion or it is laid over the seat cushion and that is arranged adjacently to and on a vehicle front side of a luggage compartment, comprising: a forwardly biasing member configured to apply a force to turn the seat back in a direction in which the seat back changes to the forwardly folded state; an engaging device including a first engaging member provided at the seat back and a second engaging member provided at the seat cushion or a vehicle and being engageable with and releasable from the first engaging member, the engaging device being in a first state in which the first engaging member engages the second engaging member to retain a raised posture of the seat back when the seat back is raised from the forwardly folded state to the predetermined raised state, the engaging device being in a second state in which the engagement of the first engaging member with the second engaging member is released so that the seat back changes to the forwardly folded state by the force of the forwardly biasing member when the seat back is to be folded forwardly; an electric motor configured to turn the seat back around the part in the vicinity of the rear end of the seat cushion; and a drive circuit configured to activate the electric motor, wherein the drive circuit includes: wherein the compulsory cutting mechanism includes an interlocking switch that works with operation of the engaging device, and wherein the interlocking switch is in an ON state, for allowing the electric conduction by the drive circuit to the electric motor, when the engaging device is in the second state, thereby causing the seat back to be the forwardly folded state, and is an OFF state, for cutting electric conduction by the drive circuit to the electric motor, when the seat back is raised from the forwardly folded state to the predetermined raised state and the engaging device is in the first state.