| 摘要 |
A structure of seat back frame in a seat back of a hinged vehicle seat, in which a connecting rod is extended therein for actuating a locking mechanism in one of locking and unlocking direction. In the structure, a stopper element is provided vertically of the seat back frame at a point adjacent to a crank-like portion of the connecting rod, with an engagement element disposed between the stopper element and crank-like portion. Upon an external load being applied to a rear side of the seat back, the stopper element is thereby deformed in a direction to the crank-like portion of connecting rod and brought to engagement therewith via the engagement element, so that the connecting rod is prevented against undesired rotation in the unlocking direction.
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