| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the safety of an occupant seated in a vehicle seat even if a load collides with a seat back of the vehicle seat from the rear side. Ž<P>SOLUTION: The lock structure includes: a pressure receiving plate 62 which is incorporated in a seat back 3, and moves forward to a vehicle front side by a collision load when the collision load is applied from the rear side of the seat back 3; a lock pin 61 which is retractably movably incorporated into the seat back 3 in a vehicle width direction, and fitted to a lock pin hole 5a bored in a car body side surface 5 in a vehicle compartment; and a cam mechanism 63 which converts the linear movement of the pressure receiving plate 62 into a linear movement actually perpendicular to that linear movement when the pressure receiving plate 62 moves forward to a vehicle front side by receiving the collision load, moves forward the lock pin 61 usually stopped in a removed state from the lock pin hole 5a, and inserts the lock pin 61 into the lock pin hole 5a. The pressure receiving plate 62 is arranged between upper and lower portions of the seat back 3. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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