Seat for vehicle

Patent metadata

Field	Value
Publication number	US-9849809-B2
Application number	US-201314648142-A
Country	US
Kind code	B2
Filing date	Nov 12, 2013
Priority date	Nov 30, 2012
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A vehicle seat is provided in which a seat back is constrained from tilting down when a seat cushion is moved to a position in which the seat back cannot be tilted down. The vehicle seat includes a base frame, a seat cushion frame ( 3 ) horizontally movable relative to the base frame between a first position and a second position different from the first position, a seat back frame ( 4 ) rotatable relative to the seat cushion frame ( 3 ), a lock member ( 5 ) configured to constrain the seat back frame ( 4 ) from tilting rearward, and an unlock mechanism ( 6 ) configured to release a lock applied by the lock member ( 5 ) when the seat cushion frame ( 3 ) is moved from the first position to the second position.

First claim

The invention claimed is:

1. A vehicle seat comprising a base frame and a seat frame disposed above the base frame, the seat frame comprising:
a seat cushion frame slidable relative to the base frame between a first position and a second position different from the first position;
a seat back frame rotatable relative to the seat cushion frame;
a lock member configured to constrain the seat back frame from tilting rearward; and
an unlock mechanism configured to release a lock applied by the lock member, in a manner coordinated with a motion of the seat cushion frame from the first position to the second position,
wherein the lock member is configured to be movable to a lock position in which the seat back frame is constrained from tilting rearward, and to an unlock position in which the seat back frame is allowed to tilt rearward,
the unlock mechanism comprises a pull member connected to the lock member, and an engageable portion provided at the base frame, the engageable portion being engageable with the pull member, and
engagement of the engageable portion with the pull member occurring while the seat cushion frame is moving from the first position to the second position causes the pull member to be pulled, which in turn causes the pull member to move the lock member from the lock position toward the unlock position.

2. The vehicle seat according to claim 1 , further comprising:
a cable provided at the seat frame, the cable including a wire and a sheath covering and holding the wire in a manner that renders the wire movable therein; and
a guide configured to hold the sheath,
wherein the guide has a pair of openings provided in positions separate in a direction of extension of the sheath held by the guide, the sheath being disposed through the pair of openings, the guide being configured to be capable of guiding the sheath moving along a path connecting the pair of openings.

3. The vehicle seat according to claim 1 , wherein the seat cushion frame comprises:
left and right side frames that constitute left and right frames of a seat cushion; and
a lateral slide mechanism configured to support the side frames in a manner that renders the side frames movable in a lateral direction,
wherein the lateral slide mechanism is attached to an extension portion formed by bending a rear portion of a side frame inward in the lateral direction, the extension portion extending inward in the lateral direction from the rear portion of the side frame.

4. The vehicle seat according to claim 1 , comprising:
a seat cushion including the seat cushion frame;
a seat back including the seat back frame;
an ottoman configured to be movable between a support position in which the ottoman protrudes frontward beyond the seat cushion to support feet of an occupant and a retracted position that is below the support position; and
an operation lever configured to be manipulated to operate the ottoman,
wherein the seat cushion frame comprises:
left and right side frames that constitute left and right frames of the seat cushion;
a movable member configured to be movable relative to the side frames by being supported by the side frames via a plurality of links; and
a lever bracket provided to attach the operation lever to a side frame,
wherein the lever bracket is disposed below one of the plurality of links and attached to the side frame.

5. The vehicle seat according to claim 1 , comprising a biasing member configured to bias the lock member from the unlock position toward the lock position.

6. The vehicle seat according to claim 1 , wherein engagement of the pull member with the engageable portion occurs immediately before the seat cushion frame comes to the second position.

7. The vehicle seat according to claim 1 , comprising:
a seat cushion including the seat cushion frame;
a seat back including the seat back frame; and
a seat belt,
wherein the seat back includes a belt guide configured to support the seat belt in a position corresponding to an upper end of a shoulder in a manner that permits the seat belt to be pulled out,
wherein the seat cushion frame includes a pair of side frames disposed in laterally separate positions and extending in a frontward-rearward direction, and an inner frame provided at an inner side of one of the pair of side frames provided on a side on which the belt guide is provided, the inner frame being joined to the one of the side frames and extending in the frontward-rearward direction, and
wherein the belt guide is disposed in a position such that at least part of the belt guide is in a region of which a lateral range is defined by a lateral range in which the one of the side frames and the inner frame are disposed.

8. The vehicle seat according to claim 7 , wherein the seat cushion includes, in addition to a first inner frame that is the inner frame provided at the inner side of one of the pair of side frames provided on a side on which the belt guide is provided, a second inner frame provided at an inner side of the other of the side frames provided on a side on which the belt guide is not provided, the second inner frame being joined to the other of the side frames and extending in the frontward-rearward direction,
the first inner frame and the second inner frame each having a bent portion that is bent with a rear side thereof shifted inward,
wherein the vehicle seat further comprises a connecting member that connects the first inner frame and the second inner frame.

9. The vehicle seat according to claim 1 , comprising:
a seat cushion including the seat cushion frame;
a seat back including the seat back frame; and
a seat belt,
the seat belt extending along the seat cushion under the seat cushion,
wherein the vehicle seat comprises:
a slide rail mechanism configured to support the seat cushion in a manner that renders the seat cushion slidable therealong; and
a cover member disposed between the slide rail mechanism and the seat belt under the seat cushion.

10. The vehicle seat according to claim 9 , wherein the cover member has a protrusion formed on a surface of the cover member which faces the slide rail mechanism.

11. The vehicle seat according to claim 10 , further comprising a rod-shaped member supported on the rear end portion of the side frame, the rod-shaped member extending in a lateral direction,
wherein the seat belt under the seat cushion and the cover member extend along in a frontward-rearward direction, and
wherein the cover member includes a rear end portion having an opening that opens rearward, the opening being engaged with the rod-shaped member.

12. The vehicle seat according to claim 11 , wherein the seat belt is looped around the rod-shaped member, and routed from under the seat cushion upward.

13. The vehicle seat according to claim 1 , wherein the engageable portion is configured to be movable relative to the base frame, such that a force of a predetermined magnitude or greater applied from the pull member causes the engageable portion to move together with the pull member.

14. The vehicle seat according to claim 13 , comprising an elastic member configured to bias the engageable portion in a direction reverse to that of a force received by the engageable portion from the pull member,
wherein a biasing force of the elastic member is greater than a force required to move the lock member.

Assignees

• Ts Tech Co Ltd

Inventors

• Watanabe Masato

Classifications

• B60N2/12 Primary

  slidable and tiltable · CPC title

• B60R2022/1818

  Belt guides · CPC title

• B60N2/34

  into a bed · CPC title

• B60N2/6009

  covering more than only the seat · CPC title

• B60R22/00

  Safety belts or body harnesses in vehicles (safety belts or body harnesses in general A62B35/00) · CPC title