Vehicle seat

摘要

In a vehicle seat (10), a deformable portion (32) extends continuously from an edge portion of a placement hole (28) towards an outside of the placement hole (28). When the deformable portion (32) is plastically deformed by a fastening bolt (40), the deformable portion (32) does not readily deform so as to be pushed outwards, but deforms so as to be squashed. When a low press-contact force acts on a side face (32D), the deformable portion (32) does not readily perform plastic deformation, and an impact load imparted to a seatback frame (44) can be stably absorbed by the deformable portion (32). Impact load imparted to the seatback frame (44) can be continuously absorbed by the deformable portion (32) since the deformable portion (32) deforms continuously. Accordingly, impact load imparted to the seatback frame (44) can be efficiently absorbed by the deformable portion (32).

主权项

1. A vehicle seat comprising:
a cushion frame provided inside a seat cushion of a vehicle seat on which an occupant sits; a seatback frame provided inside a seatback of the seat; a coupling member that rotatably supports the seatback frame, that couples together the cushion frame and the seatback frame, and that is provided with a fixing hole such that the coupling member, is fixed to the cushion frame; a fixing portion that is inserted through the fixing hole, and that fixes the coupling member to the cushion frame; and a weakened portion that is provided to the coupling member, that extends upward or downward continuously from an edge portion of the fixing hole, and that lets the coupling member undergo relative rotation with respect to the cushion frame by performing plastic deformation due to being pushed by the fixing portion when load in the vehicle rear direction or the vehicle front direction is imparted to the seatback frame at a time of vehicle collision, wherein the coupling member and the weakened portion are plate shaped, and a plate thickness of the weakened portion at an area close to the edge portion of the fixing hole is thinner than a plate thickness of the coupling member and becomes gradually thicker on progression of extending upward or downward from the edge portion of the fixing hole.