Patent ID: 8888178

Claim:
A vehicle seat comprising: reclining devices which are provided at both left and right side portions of a seat back, respectively, and having operation shafts connected to each other by a rod such that the operations shafts of the respective reclining devices rotate in synchronization with each other to release a locking state thereof; a deformation member which is supported by a framework of the seat back and is configured to move forward by a collision of an object from a rear side due to a vehicle collision, the deformation member including an engaging portion positioned at a rear portion of the rod; and a locking portion integrally engaged with the rod between the deformation member and the rod and configured to lock rotational movement of rod, the locking portion including a rear side that extends in a downward slanted direction and having a locking surface that includes a steep slope portion and a gentle slope portion configured to engage the engaging portion of the deformation member, wherein during the collision of the object from the rear side, the engaging portion of the deformation member is moved forward to climb the locking surface of the locking portion from the gentle slope portion toward the steep slope portion such that the deformation member is engaged to the rod via the locking portion to restrain a rotational movement of the rod in an unlocking direction of the reclining devices.