| 摘要 |
A reclining device for vehicle seats having a structure capable of reliably maintaining a seat back locking state for preventing the seat back from being undesirably moved on the seat cushion is disclosed. The reclining device includes a base plate, an arm plate, a central shaft, a cam, a pair of locks, a guide plate, an action spring, a return spring, and an actuating lever. The central shaft has a first angled part provided on an intermediate portion of the central shaft and a second angled part provided on an end of the central shaft. The cam has a through hole, a main cam heel and a pair of subsidiary cam heels. Each lock has a main lock heel, a pair of subsidiary lock heels, and a guide protrusion provided on a surface of the lock in a direction parallel to an axis of the central shaft.
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