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 that supports the seatback frame rotatably, that is provided with a fixing hole such that the coupling member is fixed to the cushion frame, and that couples together the cushion frame and the seatback frame; a fixing portion that is inserted through the fixing hole, and that fixes the coupling member to the cushion frame; a plate that is integrally provided at one side in a sheet thickness direction of the coupling member, that is fixed to the coupling member and to the cushion frame by the fixing portion, and that is provided with a weak portion that continuously extends from an edge portion of the fixing 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 the vehicle rear direction; and a first thickened portion that is formed by integrally providing a support plate to the coupling member at a vehicle rear direction from the fixing hole and at one side in the sheet thickness direction of the coupling member, and that includes a support hole for coupling the coupling member to the cushion frame.