SEAT RECLINING DEVICE

摘要

In a seat reclining device, reclining mechanisms (10A, 10B) that are respectively provided on right and left sides of a seat (1) are constructed such that locking and unlocking motion thereof can be performed in synchronism with each other via a connection member (20). A connection structure of the connection member (20) and a operation shaft (16A) is constructed as a transmission preventing mechanism for preventing transmission of the unlocking motion between the reclining mechanisms (10A, 10B) when a load is laterally disproportionately applied to the seat back 2 in which the reclining mechanisms (10A, 10B) are in a locking condition such that a relatively different rotational displacement that permits to release the locking condition is generated between the reclining mechanisms (10A, 10B) that are arranged in rotationally synchronism with each other.