A lock mechanism includes a lock shaft (12) attached to a first bracket (3), a lock shaft support shaft (11), and a biasing spring that biases the lock shaft (12) in a direction in which the lock shaft (12) abuts against a second bracket (4). Rotational mo...

A retractable headrest assembly for a seat includes a headrest assembly mounted on a top portion of a seatback for pivotal movement between use and retracted positions about a first axis, and a retracting mechanism for toggling the headrest assembly to eit...