Conveyance seat

Patent metadata

Field	Value
Publication number	US-2018257518-A1
Application number	US-201815877877-A
Country	US
Kind code	A1
Filing date	Jan 23, 2018
Priority date	Mar 8, 2017
Publication date	Sep 13, 2018
Grant date	—

Abstract

A conveyance seat that can increase an engagement force between components in a walk-in mechanism is provided. The conveyance seat -comprises a plate-like tilting member that transmits a pivoting force to a back frame and is pivotable relative to the back frame; a plate-like engagement member displaceable between an engaged position and a non-engaged position with the tilting member; and a plate-like locking member displaceable between a locked position and an unlocked position relative to the engagement member. The engagement member comprises projections including a slanted-projection having a first side wall in a frontward pivoting direction of the back frame. The tilting member comprises depressions engageable with the projections including a slanted-depression having a second side wall facing the first side wall. The first and second side walls are separated and each slant such that a lower end is situated more frontward in the pivoting direction than an upper end.

First claim

What is claimed is:

1 . A conveyance seat comprising:
a seat cushion; a seatback that is pivotable frontward and rearward relative to the seat cushion; a cushion frame that is a frame of the seat cushion; a back frame that is a frame of the seatback and is coupled to the cushion frame to he pivotable frontward and rearward relative to the cushion frame; a tilting member having a plate-like shape that transmits, to the back frame, pivoting force for pivoting the back frame and is pivotable relative to the back frame about a pivot axis of the back frame; an engagement member having a plate-like shape that is coupled to the back frame and displaceable between an engaged position, where the engagement member is engaged with the tilting member, and a non-engaged position, where the engagement of the engagement member with the tilting member is released; and a locking member having a plate-like shape that is displaceable between a locked position, where the engagement member is locked in the engaged position, and an unlocked position, where the engagement member is not locked in the engaged position, the engagement member comprising projections; the tilting member comprising depressions that are engageable with the projections; the projections including a slanted projection; the depressions including a slanted depression that engages with the slanted projection; the slanted projection comprising a first side wall situated in the frontward pivoting direction of the back frame; the slanted depression comprising a second side wall that faces the first side wall; the first side wall being separated from the second side wall when the engagement member is placed in the engaged position; each of the first side wall and the second side wall comprising an upper end and a lower end, wherein the upper end is situated farther from the pivot axis of the back frame than the lower end is; the first side wall and the second side wall each slanting such that the lower end is situated more frontward than the upper end is in the frontward pivoting direction of the back frame.

2 . The conveyance seat according to claim 1 , wherein
the engagement member comprises a first engagement portion and a second engagement portion that are offset from each other along the pivot axis of the back frame; the projections include a first projection, a second projection, a third projection, and a fourth projection; the depressions include a first depression, a second depression, a third depression, and a fourth depression; the first engagement portion comprises the first projection and the second projection; the second engagement portion comprises the third projection and the fourth projection; the tilting member comprises a first receiving member and a second receiving member; the first receiving member comprises the first depression and the second depression that are respectively engageable with the first projection and the second projection; and the second receiving member comprises the third depression and the fourth depression that are respectively engageable with the third projection and the fourth projection.

3 . The conveyance seat according to claim 2 , wherein
the first engagement portion and the second engagement portion each have a plate-like shape and each are configured to be pivotable about an axis that is parallel to a pivot axis of the tilting member; the locking member is configured to abut the first engagement portion in a pivoting direction of the locking member when the locking member is placed in the locked position; the first depression or the second depression of the first receiving member is a tight-fit depression that is the most distant depression from a pivot axis of the first engagement portion; the first projection or the second projection of the first engagement portion is a tight-fit projection that engages with the tight-fit depression; and when the first engagement portion is placed in the engaged position, there is no clearance between the tight-fit depression and the tight-fit projection in the pivoting direction of the back frame.

4 . The conveyance seat according to claim 2 , wherein
the first engagement portion and the second engagement portion each have a plate-like shape and each are configured to be pivotable about an axis that is parallel to a pivot axis of the tilting member; a thickness of the first engagement portion is greater than a thickness of the second engagement portion; the first depression or the second depression of the first receiving member is a tight-fit depression that is the most distant depression from a pivot axis of the first engagement portion; the first projection or the second projection of the first engagement portion is a tight-fit projection that engages with the tight-fit depression; and when the first engagement portion is placed in the engaged position, there is no clearance between the tight-fit depression and the tight-fit projection in the pivoting direction of the back frame.

5 . The conveyance seat according to claim 2 , wherein
the third depression and the fourth depression of the second receiving member are situated closer to a pivot axis of the tilting member than the first depression and the second depression of the first receiving member are, and the third projection or the fourth projection of the second engagement portion is the slanted projection.

6 . The conveyance seat according to claim 2 , wherein
the first engagement portion and the second engagement portion are configured to be collectively displaced.

7 . The conveyance seat according to claim 1 , wherein
the engagement member is configured to be pivotable about an axis that is parallel to a pivot axis of the tilting member; the depressions of the tilting member include a tight-fit depression that is the most distant depression from a pivot axis of the engagement member; the projections of the engagement member include a tight-fit projection that engages with the tight-fit depression; and when the engagement member is placed in the engaged position, there is no clearance between the tight-fit depression and the tight-fit depression in the pivoting direction of the back frame.

Assignees

• Toyota Boshoku Kk

Inventors

• Takiya Koji
• Kuroda Masato

Classifications

• B60N2/2227 Primary

  and provided with braking systems · CPC title

• B60N2/20 Primary

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