Vehicle seat

摘要

Load imparted to a seat back frame is stably absorbed and efficiently absorbed. In a vehicle seat 10, a weak portion 48 is formed by a fixing plate (50). The weak portion (48) continuously extends from an edge portion of a fixing hole (44) in the relative movement direction with respect to a hinge base bracket (40) of a fastening bolt. Thus the weak portion (48) presses against the fastening bolt when the hinge base bracket (40) rotationally moves about the axial line of a support hole (42). Moreover, when the weak portion (48) plastically deforms, deformation so as to press the weak portion (48) wider is suppressed, such that the weak portion (48) is deformed so as to be squashed. Consequently, load imparted to a seatback frame (64) can be stably absorbed by the weak portion (48). Moreover, due to the weak portion (48) continuously plastically deforming when the weak portion (48) is plastically deformed by the fastening bolt, the load imparted by the weak portion (48) to the seatback frame (64) can be efficiently absorbed.

主权项

1. A vehicle seat comprising:
a cushion frame provided inside a seat cushion; a seatback frame provided inside a seatback; a coupling member having a planar portion and a fixing hole disposed in the planar portion, the coupling member supporting the seatback frame rotatably and being fixed to the cushion frame via the fixing hole, the coupling member coupling the cushion frame to the seatback frame; a fixing plate that is integrally provided on a side of the planar portion and having an elongated guide hole overlapping the fixing hole, the elongated guide hole having a size greater than the fixing hole so as to form a thickened portion surrounding a weak portion of the coupling member; and a fixing portion disposed in the fixing hole to fix together the fixing plate, the coupling member, and the cushion frame, wherein
the weak portion continuously extends from an edge portion of the fixing hole along with the elongated guide hole in a direction of relative movement of the fixing portion with respect to the coupling member when load is imparted to the seatback frame in a vehicle rear direction, and wherein the fixing portion plastically deforms the weak portion when the load is imparted to the seatback frame in the vehicle rear direction.