Vehicle seat

Patent metadata

Field	Value
Publication number	US-2018072187-A1
Application number	US-201715703156-A
Country	US
Kind code	A1
Filing date	Sep 13, 2017
Priority date	Sep 15, 2016
Publication date	Mar 15, 2018
Grant date	—

Abstract

A vehicle seat in which a swiveling motion of a sub-frame is restricted only to a desirable direction is provided. A sub-frame is suspended from a seatback frame. A first elastic member connects a right upper end of the sub-frame to the seat back frame, and a second elastic member a left upper end of the sub-frame to the seat back frame. A universal joint mechanism connects a lower lateral portion of the sub-frame to a lateral member of the seat back frame.

First claim

What is claimed is:

1 . A vehicle seat, comprising:
a main frame including a seatback frame contoured along a back of an occupant; and a sub-frame suspended from a front face of the seat back frame; wherein the sub-frame includes a right longitudinal portion, a left longitudinal portion, and a lower lateral portion extending between the right longitudinal portion and the left longitudinal portion, the vehicle seat further comprising: a first elastic member that connects a right upper end of the right longitudinal portion of the sub-frame of the seat back frame; a second elastic member that connects a left upper end of the left longitudinal portion of the sub-frame to the seat back frame; and a universal joint mechanism that connects the lower lateral portion of the sub-frame to a lateral member of the seat back frame, wherein the first elastic member and the second elastic member are adapted to be elastically bent by a motion of the occupant to allow the sub-frame to swivel, and wherein the universal joint mechanism is adapted to allow the sub-frame to swivel while receiving a load applied to the sub-frame in an anteroposterior direction.

2 . The vehicle seat as claimed in claim 1 ,
wherein the first elastic member and the second elastic member include a blade spring, and wherein the first elastic member and the second elastic member are inclined symmetrically in such a manner that a distance between an inner major face of the first elastic member and an inner major face of the second elastic member is increased toward the lower side.

3 . The vehicle seat as claimed in claim 1 , wherein the universal joint mechanism includes:
a first joint attached to the lower lateral portion of the sub-frame, a second joint attached to the lateral member of the seat back frame, and an arm extending in the anteroposterior direction between the first joint and the second joint.

4 . The vehicle seat as claimed in claim 3 , wherein the first joint and the second joint include a ball joint.

5 . The vehicle seat as claimed in claim 2 , wherein the universal joint mechanism includes:
a first joint attached to the lower lateral portion of the sub-frame, a second joint attached to the lateral member of the seat back frame, and an arm extending in the anteroposterior direction between the first joint and the second joint.

6 . The vehicle seat as claimed in claim 5 , wherein the first joint and the second joint include a ball joint.

Assignees

• Toyota Motor Co Ltd

Inventors

• Katoh Kohshi
• Gonzalez Uribe Carlos David
• Suwa Yasuhiro

Classifications

• B60N2/682 Primary

  Joining means · CPC title

• B60N2/20

  the back-rest being tiltable, e.g. to permit easy access (B60N2/04, B60N2/22 {, B60N2/3002} take precedence) · CPC title

• B60N2/0284

  Adjustable seat-cushion length (B60N2/0224 takes precedence) · CPC title

• B60N2/028 Primary

  Elastically mounted back-rests · CPC title

• B60N2/986

  Side-rests (B60N2/2872, B60N2/885 take precedence) · CPC title