| 摘要 |
A catch member ( 14 ) extending in the width direction of a seat cushion ( 1 ) is arranged inside a front portion of the seat cushion ( 1 ) and is supported so as to be vertically movable. There are also provided a torsion spring ( 16 ) for urging the catch member ( 14 ) to move upward and a pendulum member ( 18 ) for operating with an inertial force upon an abrupt deceleration to inhibit vertical movement of the catch part. When a passenger sits on the seat cushion ( 1 ), the catch member ( 14 ) moves downward to preclude deterioration in seating comfort. When the passenger's rear end ( 22 ) starts to move forward upon an abrupt deceleration, the catch member ( 14 ) is locked and the rear end ( 22 ) is caught by the catch member ( 14 ). This makes it possible to suppressed the forward movement of the passenger with reliability, and allow lightweight and low-cost configuration with simple configuration.
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