WO2017171663A1

WO2017171663A1 - Vehicle seat wire structure and vehicle seat

Info

Publication number: WO2017171663A1
Application number: PCT/TH2016/000030
Authority: WO
Inventors: Prad NOCHAIWONG
Original assignee: Asian Honda Motor Co., Ltd.
Priority date: 2016-03-30
Filing date: 2016-03-30
Publication date: 2017-10-05

Abstract

A vehicle seat wire structure includes: a first wire (32) that extends in a front-to-rear direction and is embedded in a side part (24) which is arranged at an end part in a vehicle width direction of a seat pad (20) of a vehicle seat (13); a second wire (33) that extends in the front-to-rear direction and is embedded above the first wire (32) in the side part (24); and a reinforcement wire (35) that is oblique to a vertical direction and is embedded in the side part (24), wherein a rear end part of the second wire (33) is fixed to a rear end part of the first wire (32), a first end part in the vertical direction of the reinforcement wire (35) is fixed to the first wire (32), and a second end part in the vertical direction of the reinforcement wire (35) is fixed to the second wire (33).

Description

DESCRIPTION

VEHICLE SEAT WIRE STRUCTURE AND VEHICLE SEAT TECHNICAL FIELD

[0001]

The present invention relates to a vehicle seat wire structure and a vehicle seat.

BACKGROUND

[0002]

A vehicle seat has a configuration in which a wire structure is embedded in a seat pad.

The seat pad includes a main support part that is arranged in the vicinity of the center in the vehicle width direction and a side support part that extends from both sides in the vehicle width direction of the main support part (for example, refer to Patent Document 1). Further, the wire structure of Patent Document 1 includes a lower frame wire that is embedded at the lower part of the side support part, an upper frame wire that is embedded at the upper part of the side support part, and a spring wire that is wound rotatably around the lower frame wire and the upper frame wire.

In this configuration, the above wire structure is embedded in the side support part, and thereby support performance for an occupant at the side support part may be improved.

[Related Art Documents]

[Patent Documents]

[0003]

[Patent Document 1 ] Japanese Examined Patent Application, Second Publication No. S61 -444883

SUMMARY OF INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0004]

However, according to the configuration of Patent Document 1 described above, since the spring wire is wound around the upper frame wire and the lower frame wire, the configuration may be complicated, and production costs may be increased.

Further, since the configuration of Patent Document 1 described above is a configuration in which the spring wire is rotated with respect to the upper frame wire and the lower frame wire in accordance with a relative displacement of the upper frame wire and the lower frame wire, there is also a problem in that an abnormal noise may easily occur at the time of the rotation.

[0005]

In view of the foregoing, an object of an aspect of the present invention is to provide a vehicle seat wire structure and a vehicle seat capable of securing support performance and also capable of simplifying the configuration and reducing costs.

MEANS FOR SOLVING THE PROBLEM

[0006]

In order to achieve the above object, a vehicle seat wire structure and a vehicle seat according to an aspect of the present invention employs the following configurations.

(1) A vehicle seat wire structure according to an aspect of the present invention includes: a first wire that extends in a front-to-rear direction and is embedded in a side part which is arranged at an end part in a vehicle width direction of a seat pad of a vehicle seat; a second wire that extends in the front-to-rear direction and is embedded above the first wire in the side part; and a reinforcement wire that is oblique to a vertical direction and is embedded in the side part, wherein a rear end part of the second wire is fixed to a rear end part of the first wire, a first end part in the vertical direction of the reinforcement wire is fixed to the first wire, and a second end part in the vertical direction of the reinforcement wire is fixed to the second wire.

[0007]

(2) In the aspect of the above (1), the fixing part between the reinforcement wire and the second wire may be arranged at a more frontward position than the fixing part between the reinforcement wire and the first wire.

[0008]

(3) In the aspect of the above (1) or (2), the vehicle seat wire structure may include a third wire that extends in the vehicle width direction and is embedded in a front part of the seat pad, wherein part of the first wire may be fixed to the third wire and arranged at a more frontward position than the fixing part between the reinforcement wire and the first wire, and part of the second wire may be fixed to the third wire and arranged at a more frontward position than the fixing part between the reinforcement wire and the second wire.

[0009]

(4) In a vehicle seat according to another aspect of the present invention, a vehicle seat wire structure of any of the above (1) to (3) is embedded in a seat pad.

ADVANTAGE OF THE INVENTION

[0010]

According to the aspect of the above (1), since the second wire is embedded in the upper part of the side part, the rigidity of the side part can be secured. Thereby, it is possible to prevent a crush deformation in the vertical direction of the side part, a bending deformation outward in the vehicle width direction, or the like to improve the support provided to an occupant (improve support performance).

Further, since the reinforcement wire is fixed to the first wire and the second wire, when a load downward or outward in the vehicle width direction acts on the side part and the second wire is displaced with respect to the first wire, the second wire can be biased upward or inward in the vehicle width direction by the reinforcement wire. At this time, since the reinforcement wire is sloped with respect to the vertical direction, the reinforcement wire is flexibly deformed upon the displacement of the second wire. Thereby, it is possible to improve an elastic force of the second wire and reliably prevent the crush deformation or the bending deformation described above, and it is possible to prevent an excess displacement of the second wire.

Further, as described above, an excess displacement of the second wire can be prevented by the reinforcement wire, and in addition, a load that acts on the second wire can be distributed also to the reinforcement wire. Thereby, even when the rear end part of the second wire is fixed to the rear end part of the first wire, it is possible to prevent a crack or the like from occurring at the fixing part.

As a result, it is possible to simplify the configuration and reduce costs while concurrently securing desired support performance as compared to the configuration in which the spring wire is joined rotatably to the upper frame wire and the lower frame wire of the related art. Further, since the reinforcement wire is fixed to the first wire and the second wire, it is possible to prevent an abnormal noise from occurring at the time of the displacement of the second wire.

[0011]

According to the aspect of the above (2), since the fixing part between the reinforcement wire and the second wire is arranged at a more frontward position than the fixing part between the reinforcement wire and the first wire, the reinforcement wire can be flexibly deformed upon the displacement of the second wire. Thereby, it is possible to further improve support performance.

[0012]

According to the aspect of the above (3), a load that acts on the second wire can be distributed also to the third wire. Thereby, even when the second wire is fixed to the first wire and the third wire, it is possible to prevent a crack or the like from occurring at the fixing part. Further, it is possible to impart stable support performance to the entire side part and an inner part that is arranged inward in the vehicle width direction with respect to the side part of the seat pad.

As a result, it is possible to simplify the configuration while securing desired support performance.

[0013]

According to the aspect of the above (4), since the vehicle seat includes the wire structure described above, it is possible to provide a vehicle seat having excellent support performance at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014]

FIG. 1 is a lateral view showing a vehicle interior.

FIG. 2 is a perspective view of a rear seat seen from frontward of a vehicle. FIG. 3 is an enlarged perspective view of a rear seat showing a wire structure that is embedded in a seat pad.

FIG. 4 is an enlarged lateral view of a rear seat showing a wire structure.

FIG. 5 is an enlarged front view of a rear seat showing a wire structure.

DESCRIPTION OF THE EMBODIMENTS [0015]

Hereinafter, an embodiment of the present invention will be described based on the drawings.

The present embodiment is described using an example in which a vehicle seat wire structure and a vehicle seat are employed in a rear seat of a vehicle. Note that, it is supposed that front-to-rear and vertical directions in the following description are the same as front-to-rear and vertical directions of a vehicle if there is no particular description. Further, in the drawings, an arrow UP indicates an upward direction, and an arrow FR indicates a frontward direction.

[0016]

FIG. 1 is a lateral view showing a vehicle interior.

As shown in FIG. 1, a front seat 12 and a rear seat (vehicle seat) 13 are arranged with a distance in the front-to-rear direction on a vehicle body floor 11 of a vehicle 1.

The front seat 12 includes a seat cushion 14 and a seatback 15 that is reclinably joined to a rear end part of the seat cushion 14.

[0017]

FIG. 2 is a perspective view of the rear seat 13 seen from frontward of the vehicle 1.

As shown in FIG. 2, the rear seat 13 is a bench seat on which three occupants can be seated. The rear seat 13 is formed across the entire vehicle width direction of a vehicle interior. Specifically, the rear seat 13 includes a seat cushion 16 and a seatback 17 that is reclinably joined to a rear end part of the seat cushion 16.

[0018]

FIG. 3 is an enlarged perspective view of the rear seat 13 showing a wire structure 30 that is embedded in a seat pad 20.

As shown in FIG. 3, the seat cushion 16 supports mainly the buttocks area of the occupant. The seat cushion 16 includes the seat pad 20 and the wire structure 30 that is embedded in the seat pad 20.

[0019]

As shown in FIG. 2, the seat pad 20 includes a main support part 23 that is arranged in the vicinity of the center in the vehicle width direction and a side support part (side part) 24 that extends from both sides in the vehicle width direction of the main support part 23. The side support part 24 supports the buttocks area of the occupant from below and from the outside in the vehicle width direction. An upper surface of the side support part 24 protrudes upward from the inside toward the outside in the vehicle width direction. Note that, the seat pad 20 may be, for example, a cushion material that consists of a foaming resin or the like covered by a surface skin.

[0020]

FIG. 4 is an enlarged lateral view of the rear seat 13 showing the wire structure 30. FIG. 5 is an enlarged front view of the rear seat 13 showing the wire structure 30.

As shown in FIG. 4 and FIG. 5, the wire structure 30 is configured such that a plurality of wires (for example, wires 31 to 35) are joined to one another. The wires 31 to 35 are formed by an elastically deformable steel material and the like.

[0021 ]

As shown in FIG. 3 to FIG. 5, the wire structure 30 includes a rear wire 31, a lower wire (first wire) 32, an upper wire (second wire) 33, a front wire (third wire) 34, and a reinforcement wire 35.

[0022]

The rear wire 3 1 is embedded in a rear part of the seat pad 20. The rear wire 31 extends in the vehicle width direction. Part of the rear wire 3 1 arranged in the side support part 24 is a joint part (first wire) 37 that extends frontward toward the outside in the vehicle width direction.

[0023]

The lower wire 32 is formed in a C-shape that opens rearward in plan view seen from the vertical direction. Specifically, the lower wire 32 includes a front-to-rear extending part 41 and a vehicle width extending part 42.

The front-to-rear extending part 41 is embedded in lower parts of the side support parts 24. As shown in FIG. 4, the front-to-rear extending part 41 extends downward toward the front and then extends upward further toward the front. A rear end part of the front-to-rear extending part 41 is fixed (for example, welded) to an outer end part in the vehicle width direction of the joint part 37.

As shown in FIG. 3, the vehicle width extending part 42 is embedded in a front lower part of the seat pad 20. The vehicle width extending part 42 extends in the vehicle width direction. A first end part in the vehicle width direction of the vehicle width extending part 42 is joined to a front end part of a first front-to-rear extending part 41. A second end part in the vehicle width direction of the vehicle width extending part 42 is joined to a front end part of a second front-to-rear extending part 41. Note that, in the present embodiment, the lower wire 32 (the front-to-rear extending part 41 and the vehicle width extending part 42) is configured by a bending forming of one wire.

[0024]

The upper wire 33 is embedded in upper parts of the side support parts 24. That is, the upper wire 33 is arranged upward with respect to the front -to-rear extending part 41 of the lower wire 32. In side view seen in the vehicle width direction as shown in FIG. 4, the upper wire 33 extends upward toward the front and then extends downward further toward the front. Accordingly, the distance in the vertical direction between the upper wire 33 and the front-to-rear extending part 41 is gradually increased toward the front and is then gradually decreased further toward the front. Further, as shown in FIG. 3, the upper wire 33 extends outward in the vehicle width direction toward the front and then extends inward in the vehicle width direction.

[0025]

As shown in FIG. 4, a rear end part of the upper wire 33 is fixed (for example, welded) to the joint part 37. That is, the upper wire 33 is joined via the joint part 37 to the lower wire 32. Note that, the upper wire 33 may be directly fixed to the front-to-rear extending part 41 of the lower wire 32. Further, in an example of FIG. 4, the fixing part of the upper wire 33 with the joint part 37 is arranged rearward of the fixing part of the front-to-rear extending part 41 with the joint part 37. However, the fixing part of the upper wire 33 with the joint part 37 may be arranged at a more frontward position than the fixing part of the front-to-rear extending part 41 with the joint part 37. Alternatively, the fixing part of the upper wire 33 with the joint part 37 may be arranged at a similar position in the front-to-rear direction to the fixing part of the front-to-rear extending part 41 with the joint part 37.

[0026]

As shown in FIG. 3, the front wire 34 is embedded in a front part of the seat pad 20. The front wire 34 includes a center extending part 45 and an outer extending part 46 that extends from both sides in the vehicle width direction of the center extending part 45.

The center extending part 45 is arranged above the vehicle width extending part 42 of the lower wire 32. The center extending part 45 extends in the vehicle width direction. A hook member 49 for locking the front wire 34 to the vehicle body floor 11 is provided on the center extending part 45.

The outer extending part 46 extends downward toward the outside in the vehicle width direction. A lower end part of the outer extending part 46 is fixed (for example, welded) to the vehicle width extending part 42 of the lower wire 32. Further, a front end part of the upper wire 33 is fixed (for example, welded) to the outer extending part 46. Accordingly, the lower wire 32 and the upper wire 33 are joined via the outer extending part 46 to each other.

[0027]

As shown in FIG. 4 and FIG. 5, the reinforcement wire 35 is embedded in the middle parts in the front-to-rear direction of the side support parts 24. The reinforcement wire 35 is formed in a crank shape. Specifically, the reinforcement wire 35 includes a vertical extending part 5 1 , an upper bent part 52 that extends from an upper end of the vertical extending part 51, and a lower bent part 53 that extends from a lower end of the vertical extending part 51.

The vertical extending part 51 extends frontward toward the upward direction. Note that, the vertical extending part 51 may extend rearward toward the upward direction as long as the vertical extending part 51 is sloped with respect to the vertical direction. Further, the vertical extending part 51 may extend in the vehicle width direction toward the upward direction.

[0028]

The upper bent part 52 is bent inward in the vehicle width direction from an upper end of the vertical extending part 51. The upper bent part 52 is fixed (for example, welded) to the upper wire 33.

The lower bent part 53 is bent outward in the vehicle width direction from a lower end of the vertical extending part 51. The lower bent part 53 is fixed (for example, welded) to the front-to-rear extending part 41 of the lower wire 32. In the present embodiment, the fixing part (upper bent part 52) between the reinforcement wire 35 and the upper wire 33 is arranged at a more frontward position than the fixing part (lower bent part 53) between the reinforcement wire 35 and the front-to-rear extending part 41.

[0029]

Note that, each of the wires 3 1 to 35 may be formed by bending one wire. Alternatively, a plurality of wires may be joined to one another to form each of the wires 31 to 35. Further, it is possible to adjust an elastic force of the wires 31 to 35 by appropriately changing the width, shape, direction, and the like of the wires 31 to 35.

[0030]

When the seat cushion 16 described above is manufactured, first, the wires 31 to

35 of the wire structure 30 are fixed to one another by welding or the like. Then, a cushion material is formed in a state where part of the wire structure 30 is accommodated in a mold.. Then, the cushion material is covered by a surface skin, and thereby the seat cushion 16 described above is manufactured.

[0031]

In this way, in the present embodiment, the upper wire 33 is embedded in the upper part of the side support part 24, and therefore, it is possible to secure the rigidity of the side support part 24. Thereby, it is possible to prevent a crush deformation in the vertical direction of the side support part 24, a bending deformation outward in the vehicle width direction, or the like to improve the support provided to an occupant (improve support performance).

[0032]

Further, in the present embodiment, a configuration is adopted in which the reinforcement wire 35 is fixed to the lower wire 32 (front-to-rear extending part 41) and the upper wire 33.

According to this configuration, when a load downward or outward in the vehicle width direction acts on the side support part 24 and the upper wire 33 is displaced with respect to the lower wire 32, it is possible to bias the upper wire 33 upward or inward in the vehicle width direction by the reinforcement wire 35. At this time, since the reinforcement wire 35 is sloped with respect to the vertical direction, the reinforcement wire 35 is flexibly deformed upon the displacement of the upper wire 33. Thereby, it is possible to improve an elastic force of the upper wire 33 and reliably prevent the crush deformation or the bending deformation described above, and it is possible to prevent an excess displacement of the upper wire 33.

Further, in the present embodiment, as described above, an excess displacement of the upper wire 33 can be prevented by the reinforcement wire 35, and in addition, it is possible to distribute a load that acts on the upper wire 33 also to the reinforcement wire 35. Thereby, even when the rear end part of the upper wire 33 is fixed to the joint part 37, it is possible to prevent a crack or the like from occurring at the fixing part of the upper wire 33.

As a result, it is possible to simplify the configuration and reduce costs while concurrently securing desired support performance as compared to a configuration in which the spring wire is joined rotatably to the upper frame wire and the lower frame wire of the related art.

Further, in the present embodiment, since the reinforcement wire 35 is fixed to the lower wire 32 (front-to-rear extending part 41) and the upper wire 33, it is possible to prevent an abnormal noise from occurring at the time of the displacement of the upper wire 33.

[0033]

In the present embodiment, since the fixing part between the reinforcement wire 35 and the upper wire 33 is arranged at a more frontward position than the fixing part between the reinforcement wire 35 and the front-to-rear extending part 41, the reinforcement wire 35 can be flexibly deformed upon the displacement of the upper wire 33. Thereby, it is possible to further improve support performance.

[0034]

In the present embodiment, a configuration is adopted in which the lower wire

32 is fixed to the front wire 34 at a more frontward position than the fixing part between the reinforcement wire 35 and the lower wire 32 and the upper wire 33 is fixed to the front wire 34 at a more frontward position than the fixing part between the reinforcement wire 35 and the upper wire 33.

According to this configuration, a load that acts on the upper wire 33 can be distributed also to the front wire 34. Thereby, even when the upper wire 33 is fixed to the joint part 37 and the front wire 34, it is possible to prevent a crack or the like from occurring at the fixing part. Further, it is possible to impart stable support performance to the whole of the side support part 24 and the main support part 23 of the seat cushion

16.

[0035]

Further, in the present embodiment, since the seat cushion 16 includes the wire structure 30 described above, it is possible to provide a seat cushion 16 having excellent support performance at low cost.

[0036]

Note that, the technical scope of the present invention is not limited to the embodiment described above and includes embodiments in which a variety of modifications is made to the embodiment described above without departing from the scope of the present invention. That is, configurations and the like presented in the embodiment described above are merely examples and can be appropriately changed.

For example, in the embodiment described above, a case is described in which the rear seat 13 is a seat on which a plurality of occupants can be seated; however, the embodiment is not limited thereto. The rear seat 13 may be a seat on which one occupant can be seated.

In the embodiment described above, a case is described in which the vehicle seat is the rear seat 13; however, the embodiment is not limited thereto. The vehicle seat may be the front seat 12.

[0037]

In the embodiment described above, a case is described in which a side part arranged at an end part in the vehicle width direction of the seat pad is the side support part 24 that protrudes upward with respect to the main support part 23; however, the embodiment is not limited thereto. The shape of the side part of the seat pad can be appropriately changed.

Further, in the embodiment described above, a configuration is described in which the wire structure 30 is embedded in the side support parts 24; however, the embodiment is not limited thereto. The wire structure 30 may be embedded in at least one of the side support parts 24.

In the embodiment described above, a case is described in which the reinforcement wire 35 is formed in a crank shape; however, the embodiment is not limited thereto. The shape of the reinforcement wire 35 can be appropriately changed as long as the reinforcement wire 35 can be fixed to the lower wire 32 and the upper wire 33.

[0038]

Further, the components of the embodiment described above can be replaced by well-known components without departing from the scope of the present invention. Further, the modified examples described above may be appropriately combined. DESCRIPTION OF THE REFERENCE SYMBOLS [0039]

13 : rear seat (vehicle seat)

20: seat pad

24: side support part (side part)

30: wire structure

32: lower wire (first wire)

33 : upper wire (second wire)

34: front wire (third wire)

35 : reinforcement wire

37: joint part (first wire)

Claims

1. A vehicle seat wire structure comprising:

a first wire that extends in a front-to-rear direction and is embedded in a side part which is arranged at an end part in a vehicle width direction of a seat pad of a vehicle seat;

a second wire that extends in the front-to-rear direction and is embedded above the first wire in the side part; and

a reinforcement wire that is oblique to a vertical direction and is embedded in the side part, wherein

a rear end part of the second wire is fixed to a rear end part of the first wire, a first end part in the vertical direction of the reinforcement wire is fixed to the first wire, and

a second end part in the vertical direction of the reinforcement wire is fixed to the second wire.

2. The vehicle seat wire structure according to claim 1, wherein the fixing part between the reinforcement wire and the second wire is arranged at a more frontward position than the fixing part between the reinforcement wire and the first wire.

3. The vehicle seat wire structure according to claim 1 or 2, comprising a third wire that extends in the vehicle width direction and is embedded in a front part of the seat pad, wherein

part of the first wire is fixed to the third wire and arranged at a more frontward position than the fixing part between the reinforcement wire and the first wire, and part of the second wire is fixed to the third wire and arranged at a more frontward position than the fixing part between the reinforcement wire and the second wire.

4. A vehicle seat wherein

a vehicle seat wire structure according to any one of claims 1 to 3 is embedded in a seat pad.