Conveyance seat

Patent metadata

Field	Value
Publication number	US-10173559-B2
Application number	US-201615140005-A
Country	US
Kind code	B2
Filing date	Apr 27, 2016
Priority date	Mar 31, 2011
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A conveyance seat includes: a seat base; a support portion which supports the occupant from the back side; a flip-up mechanism which flips up the seat base; a biasing member which biases the support portion forward; an engagement portion which is engaged with the support portion to hold the support portion in a upright state against the biasing force; a cancel mechanism which cancels the engagement between the engagement portion and the support portion; and a return mechanism which returns the support portion from a state where the engagement with the engagement portion is canceled by the cancel mechanism to a state where the support portion is engageable with the engagement portion. The return mechanism performs the return operation in accordance with the inclination angle of the support portion inclined forward by the biasing member after the engagement between the engagement portion and the support portion is canceled.

First claim

The invention claimed is:

1. A conveyance seat comprising:
a seat back frame;
a headrest which is provided above the seat back frame;
a headrest support member which supports the headrest; and
a rotation mechanism which supports the headrest support member in a rotatable manner,

wherein:
the headrest support member comprises:
two vertical portions, each of which extends in an up and down direction of the seat back frame, and
a pillar connection portion which connects the two vertical portions;

the rotation mechanism comprises:
a biasing spring which is adjacent to the pillar connection portion and disposed in a parallel manner to the pillar connection portion, and
two plate-shaped members, each of which extends from the pillar connection portion toward the biasing spring; and

the biasing spring is located between the two plate-shaped members;
each of the two vertical portions is curved one of inward or outward in a seat width direction at a curved portion between an upper end and a lower end of the vertical portion and extends, from the curved portion, in a direction not in parallel with the other of the two vertical portions such that a tip portion of each of the two vertical portions is offset in the seat width direction from a connection portion of the vertical portion that is connected to the pillar connection portion, wherein the tip portions are at the respective ends of the two vertical portions that are opposite the ends of the vertical portions at which the pillar connection portion connects the two vertical portions; and
the two plate-shaped members are disposed between the tip portions of the vertical portions in the seat width direction.

2. The conveyance seat according to claim 1 , wherein:
when the headrest stands above the seatback, the biasing spring is located on a first side of the pillar connection portion and the vertical portions extend toward a second side of the pillar connection portion, the first side and the second side being opposite to each other.

3. The conveyance seat according to claim 1 , wherein:
a distance in a horizontal direction between the two plate-shaped members is smaller than a distance in a horizontal direction between the two vertical portions.

4. The conveyance seat according to claim 1 , wherein:
the biasing spring is located within a range of a width of at least one of the plate-shaped members in a side view.

5. The conveyance seat according to claim 1 , wherein:
the biasing spring is a coil spring; and
a first end of the coil spring is engaged with one of the plate-shaped members.

6. The conveyance seat according to claim 5 , wherein:
when the headrest stands above the seatback, a second end of the coil spring extends to a first side of the pillar connection portion and the vertical portions extend toward a second side of the pillar connection portion, the first side and the second side being opposite to each other.

7. The conveyance seat according to claim 5 , wherein:
the coil spring is mounted on a shaft which is provided between the two plate-shaped members; and
the shaft is parallel to the pillar connection portion.

8. The conveyance seat according to claim 7 , wherein:
when the headrest stands above the seatback, the shaft is located on a first side of the pillar connection portion and the vertical portions extend toward a second side of the pillar connection portion, the first side and the second side being opposite to each other.

Assignees

• Ts Tech Co Ltd

Inventors

• Tachikawa Yoichi
• Watanabe Masato

Classifications

• B60N2/68

  Seat frames · CPC title

• B60N2/3013 Primary

  the back-rest being hinged on the vehicle frame · CPC title

• B60N2/897

  with sleeves located in the back-rest for guiding the rods of the head-rest · CPC title

• B60N2/366

  characterised by the locking device · CPC title

• B60N2/856

  movable to an inoperative or stowed position · CPC title