Vehicle seat

Patent metadata

Field	Value
Publication number	US-10202053-B2
Application number	US-201715657038-A
Country	US
Kind code	B2
Filing date	Jul 21, 2017
Priority date	Jul 25, 2016
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

A vehicle seat in which a thickness of a seatback is reduced is provided. A supporting mechanism comprises a pivot shaft, a hub member, and a reinforcement shaft. A front end of a seat base frame is connected to a lower frame through a first joint in a pivotal manner. One end of a pivot shaft is connected to a rear end of the seat base frame in a pivotal manner, and other end of the pivot shaft is connected to a hub through a second joint in a pivotal manner. The pivot shaft and the reinforcement shaft are overlapped in a width direction of the vehicle at least partially.

First claim

What is claimed is:

1. A vehicle seat, comprising:
a lower frame that is disposed in a cabin of a vehicle;
an upper frame connected to the lower frame on which a backrest is formed;
a seat base frame disposed on the lower frame on which a seat base is formed;
a supporting mechanism that supports the seat base frame in a pivotal manner; and
a first joint that connects a front end portion of the seat base frame to the lower frame in a pivotal manner,
wherein the supporting mechanism comprises
a pivot shaft in which one of end portions thereof is connected to a rear end portion of the seat base frame,
a hub member that is situated within the upper frame while being connected to the upper frame,
a second joint that connects other end portion of the pivot shaft to the hub, and
a reinforcement shaft in which one of end portions is connected to the hub member, and other end portion is connected to the upper frame or the lower frame; and

wherein the pivot shaft and the reinforcement shaft are overlapped in a width direction of the vehicle at least partially.

2. The vehicle seat as claimed in claim 1 , further comprising:
a restriction mechanism that restricts a pivotal motion of the seat base frame.

3. The vehicle seat as claimed in claim 2 , wherein the restriction mechanism includes a restriction member that selectively allows and restricts a pivotal motion of the pivot shaft from both sides of the pivot shaft.

4. The vehicle seat as claimed in claim 2 , wherein
the restriction mechanism includes a restriction member that selectively allows and restricts a pivotal motion of the pivot shaft from both sides of the pivot shaft,
the restriction member includes a locking portion at which a pivotal motion of the pivot shaft is restricted,
the restriction mechanism further includes a rotating mechanism that rotates the restriction member between a locking position at which a pivotal motion of the pivot shaft is restricted by the locking portion and a pivotable position at which the pivot shaft is allowed to pivot.

5. The vehicle seat as claimed in claim 2 , wherein
the restriction mechanism includes a restriction member that selectively allows and restricts a pivotal motion of the pivot shaft from both sides of the pivot shaft;
the restriction member includes a pair of contact walls that is formed in such a manner that a clearance therebetween is gradually widened toward a leading end of the restriction member, and
the restriction mechanism further includes a rotating mechanism that rotates the restriction member between a first position at which a pivotal motion of the pivot shaft is restricted by the contact walls within a first range, and a second position at which a pivotal motion of the pivot shaft is restricted by the contact walls within a second range that is wider than the first range.

6. The vehicle seat as claimed in claim 3 , wherein
the restriction member includes a locking portion at which a pivotal motion of the pivot shaft is restricted,
the restriction mechanism further includes a rotating mechanism that rotates the restriction member between a locking position at which a pivotal motion of the pivot shaft is restricted by the locking portion and a pivotable position at which the pivot shaft is allowed to pivot.

7. The vehicle seat as claimed in claim 3 , wherein
the restriction member includes a pair of contact walls that is formed in such a manner that a clearance therebetween is gradually widened toward a leading end of the restriction member, and
the restriction mechanism further includes a rotating mechanism that rotates the restriction member between a first position at which a pivotal motion of the pivot shaft is restricted by the contact walls within a first range, and a second position at which a pivotal motion of the pivot shaft is restricted by the contact walls within a second range that is wider than the first range.

8. The vehicle seat as claimed in claim 2 , wherein the restriction mechanism further includes a buffer member that is attached to at least one of the contact wall, the locking portion, and the pivot shaft to absorb impact and noise resulting from a collision between the pivot shaft and the contact wall or the locking portion.

9. The vehicle seat as claimed in claim 3 , wherein the restriction mechanism further includes a buffer member that is attached to at least one of the contact wall, the locking portion, and the pivot shaft to absorb impact and noise resulting from a collision between the pivot shaft and the contact wall or the locking portion.

10. The vehicle seat as claimed in claim 4 , wherein the restriction mechanism further includes a buffer member that is attached to at least one of the contact wall, the locking portion, and the pivot shaft to absorb impact and noise resulting from a collision between the pivot shaft and the contact wall or the locking portion.

11. The vehicle seat as claimed in claim 5 , wherein the restriction mechanism further includes a buffer member that is attached to at least one of the contact wall, the locking portion, and the pivot shaft to absorb impact and noise resulting from a collision between the pivot shaft and the contact wall or the locking portion.

12. The vehicle seat as claimed in claim 6 , wherein the restriction mechanism further includes a buffer member that is attached to at least one of the contact wall, the locking portion, and the pivot shaft to absorb impact and noise resulting from a collision between the pivot shaft and the contact wall or the locking portion.

13. The vehicle seat as claimed in claim 7 , wherein the restriction mechanism further includes a buffer member that is attached to at least one of the contact wall, the locking portion, and the pivot shaft to absorb impact and noise resulting from a collision between the pivot shaft and the contact wall or the locking portion.

Assignees

• Toyota Motor Co Ltd

Inventors

• Gonzalez Uribe Carlos David
• Katoh Kohshi

Classifications

• B60N2/39

  Seats tiltable to compensate for roll inclination of vehicles · CPC title

• B60N2002/0212

  the seat or seat part turning about or moving along a longitudinal axis · CPC title

• F16C11/10

  Arrangements for locking · CPC title

• B60N2/02

  the seat or part thereof being movable, e.g. adjustable (adjustable arm-rests B60N2/75; adjustable head-rests B60N2/806) · CPC title

• B60N2/68 Primary

  Seat frames · CPC title