VEHICLE SEAT

• US 20150367762A1
• Filed: 06/16/2015
• Published: 12/24/2015
• Est. Priority Date: 06/24/2014
• Status: Active Grant

• Current Assignee: NHK Spring Company Limited
• Original Assignee: NHK Spring Company Limited
• Inventors: Yasuda, Kenzo, Kushiku, Hiroshi
• Granted Patent: US 9,610,871 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60N 2/4228 due to impact coming from the rear
• CPC Class Codes: B60N 2/42709 involving residual deformation or fracture of the structure
• CPC Class Codes: B60N 2/42745 of the back-rest B60N2/433 takes precedence; higher part of the back-rest moving together with the headrest B60N2/888
• CPC Class Codes: B60N 2/6009 covering more than only the seat
• CPC Class Codes: B60N 2/68 Seat frames
• CPC Class Codes: B60N 2/686 Panel like structures
• CPC Class Codes: B60N 2/7094 Upholstery springs
• CPC Class Codes: B60N 2/80 Head-rests

Abstract

A vehicle seat includes: a seatback frame of a resin-formed seatback, including a plate-shaped back face panel portion; a headrest; a seatback pad; a lattice-shaped spring member formed from wire arranged in a lattice shape, attached to the seatback frame at a front side of the back face panel portion, and that resiliently supports the seatback pad from a rear side, with a space formed between the back face panel portion and the lattice-shaped spring member; and a load transmission section provided at one of the lattice-shaped spring member or the back face panel portion and disposed inside the space so as to project out toward the side of the other one of the lattice-shaped spring member or the back face panel portion, such that a gap is formed between the load transmission section and the other one of the lattice-shaped spring member or the back face panel portion.

Claims

1. A vehicle seat comprising:

a seatback frame that configures a frame of a resin-formed seatback, and that comprises a plate-shaped back face panel portion disposed at a back face of the seatback;

a headrest that is provided at an upper end of the seatback;

a seatback pad that is provided at a front side of the seatback frame;

a lattice-shaped spring member that is formed from wire arranged in a lattice shape, that is attached to the seatback frame at a seat front side of the back face panel portion, and that is configured to resiliently support the seatback pad from a seat rear side, with a space formed between the back face panel portion and the lattice-shaped spring member; and

a load transmission section that is provided at one of the lattice-shaped spring member or the back face panel portion and is disposed inside the space so as to project out toward the side of the other one of the lattice-shaped spring member or the back face panel portion, such that a gap is formed between the load transmission section and the other one of the lattice-shaped spring member or the back face panel portion.

2. The vehicle seat of claim 1, wherein the load transmission section is a shock absorbing member that is attached to the one of the lattice-shaped spring member or the back face panel portion, and that absorbs impact by undergoing deformation.

3. The vehicle seat of either claim 1, wherein the load transmission section comprises a wire engagement portion that engages with the wire configuring the lattice-shaped spring member, and the load transmission section is attached to the lattice-shaped spring member.

4. The vehicle seat of either claim 1, wherein the load transmission section comprises an engaged-with portion that is engaged by an engagement portion provided at the back face panel portion, and the load transmission section is attached to the back face panel portion.

5. The vehicle seat of either claim 1, wherein the load transmission section is a rib formed by a portion of the back face panel portion bulging out locally toward the seat front side.

6. The vehicle seat of either claim 1, wherein the load transmission section is a rib that is joined to a front face of the back face panel portion.

7. The vehicle seat of claim 2, wherein the shock absorbing member is formed from a softer resin than the seatback frame, is joined to the back face panel portion at a high-strength joining portion and a low-strength joining portion having a lower joint strength than the high-strength joining portion, and comprises at least one curved portion curving so as to be convex toward the seat front side, with at least one of both ends in the curve direction of the curved portion supported by the low-strength joining portion.

8. The vehicle seat of claim 7, wherein the low-strength joining portion is welded to the back face panel portion at fewer weld points than the high-strength joining portion.

9. The vehicle seat of claim 2, wherein the shock absorbing member comprises:

a plate member that is attached to a front face of the back face panel portion in a state in which a gap is formed between the plate member and the back face panel portion; and

a resilient member that is interposed in the gap between the plate member and the back face panel portion.

10. A vehicle seat comprising:

a seatback frame that configures a frame of a resin-formed seatback, and that comprises a plate-shaped back face panel portion disposed at a back face of the seatback;

a headrest that is provided at an upper end of the seatback;

a seatback pad that is provided at a front side of the seatback frame so as to form a space between the seatback pad and the back face panel portion; and

a shock absorbing member that is formed from a softer resin than the seatback frame, that is disposed in the space, that is joined to the back face panel portion at a high-strength joining portion and a low-strength joining portion having a lower joint strength than the high-strength joining portion, and that comprises at least one curved portion curving so as to be convex toward a seat front side, with at least one of both ends in the curve direction of the curved portion supported by the low-strength joining portion.