Vehicle seat

• US 10,421,377 B2
• Filed: 04/07/2016
• Issued: 09/24/2019
• Est. Priority Date: 04/14/2015
• Status: Active Grant

• Current Assignee: Tachi-S Company Limited
• Original Assignee: Tachi-S Company Limited
• Inventors: Tobata, Hideo, Tsutsui, Takao, Koike, Atsushi
• Primary Examiner(s): Wendell, Mark R
• Application Number:
  US15/566,475
• Publication Number:
  US 20180141476A1
• Time in Patent Office: 1,265 Days
• Field of Search: 29721613
• CPC Class Codes: B60N 2/20 the back-rest being tiltable, e.g. to permit easy access B60N2/04, B60N2/22 , B60N2/3002 take precedence
• CPC Class Codes: B60N 2/22 the back-rest being adjustable B60N2/2878 takes precedence
• CPC Class Codes: B60N 2/4221 due to impact coming from the front
• CPC Class Codes: B60N 2/42709 involving residual deformation or fracture of the structure
• CPC Class Codes: B60N 2/688 Particular seat belt attachment and guiding
• CPC Class Codes: B60N 2/90 Details or parts not otherwise provided for
• CPC Class Codes: B60R 22/26 secured to the seat

Abstract

A vehicle seat includes a pair of side frames, a seat back which includes a pair of connecting parts which respectively support the pair of side frames to be tiltable to a front side of a seat, and a seat belt which includes an upper body restricting part, which restricts an upper body of an occupant in the seat back, and in which the upper body restricting part is moored in the side frame. The connecting part which supports the side frame includes a base part which is fixed in a frame of the seat cushion, and a force limiter part which is interposed between the base part and the side frame and allows tilting of the side frame through a plastic deformation when a tensile force exceeding a predetermined value is loaded on the upper body restricting part of the seat belt.

Claims

1. A vehicle seat comprising:

a seat cushion;

a seat back including a pair of side frames which are arranged with an interval in a seat width direction and a pair of connecting parts which respectively support the pair of side frames to be tiltable to a front side of a seat and are respectively connected with a frame of the seat cushion; and

a seat belt which includes an upper body restricting part which restricts an upper body of an occupant in the seat back and in which the upper body restricting part is moored in one side frame of the pair of side frames, wherein

the connecting part, which supports the side frame which moors the upper body restricting part, of the pair of connecting parts includes a base part which is fixed in the frame of the seat cushion, and a force limiter part which is interposed between the base part and the side frame and allows tilting of the side frame through a plastic deformation when a tensile force exceeding a predetermined value is loaded on the upper body restricting part of the seat belt, the force limiter part is provided on a tilted axis of the side frame and includes a shaft in which a base end is fixed in the frame of the seat cushion and a bracket which is fixed in a tip of the shaft and the side frame, and the shaft is twisted in accordance with tilting of the side frame.

2. The vehicle seat according to claim 1, wherein

the bracket is a cylindrical body which is arranged on an outside of the shaft to have a same axis as the shaft, a tip of the bracket is fixed in the tip of the shaft, and a base end of the bracket is fixed in the side frame.

3. The vehicle seat according to claim 2, wherein

the seat back includes a cross frame on an upper side or a lower side of the bracket, and further a reinforcing member which is fixed in each of the bracket and the cross frame and surrounds a closed area between the bracket and the side frame.

4. The vehicle seat according to claim 1, wherein:

the force limiter part includes a strip plate in which one end is fixed directly or indirectly in the frame of the seat cushion, the other end is fixed in the side frame, and at least a portion between the both ends is bent; and

the strip plate is extended in a linear shape in accordance with tilting of the side frame.