Headrest and vehicle seat

Abstract

To provide an inexpensive headrest that can suppress retreat of an occupant's head at the time of rear-end collision of a vehicle and support the occupant's head, and to provide a vehicular seat.SOLUTION: A headrest 14 includes a headrest pad 18, a headrest stay 16 and an annular mesh fabric 38. The annular mesh fabric 38 is molded integrally with the headrest pad 18 while being covered from the outside relative to a pair of holding parts 20, 22 included in the headrest stay 16, and imparts reactive force to an occupant's head when a collision load is input to the headrest pad 18 by the occupant's head, where, in other words, using the annular mesh fabric 38 instead of a dilatant pad in the headrest pad 18 can reduce cost as compared to when a dilatant pad is used in the headrest pad 18.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a headrest and a vehicle seat. [Background technology]

[0002] The headrest described in Patent Document 1 below has a dilatant pad disposed in the front part of the headrest body. The dilatant pad is normally soft and has the property of instantly hardening when a collision load is applied.

[0003] Therefore, by using a dilatant pad in the headrest body, the occupant's head can be softly supported by the dilatant pad under normal circumstances. On the other hand, in the event of a rear-end collision of the vehicle (hereinafter referred to as a "vehicle rear collision"), when a collision load is input to the headrest body by the occupant's head, the dilatant pad instantly hardens, thereby preventing the occupant's head from moving backward and improving the effectiveness of preventing whiplash injuries. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] WO2012 / 111097 publication Summary of the Invention [Problem to be solved by the invention]

[0005] However, dilatant pads are generally expensive components, and simply using a dilatant pad in the front portion of the headrest body increases the price of the headrest body.

[0006] In consideration of the above, the present invention aims to provide an inexpensive headrest and vehicle seat that can support the occupant's head and prevent the occupant's head from moving backward during a rear-end collision of the vehicle. [Means for solving the problem]

[0007] The headrest according to the invention of claim 1 comprises: a headrest main body provided above a seat back of a vehicle seat, formed of a foaming agent, and supporting the head of an occupant seated on a seat cushion; a headrest stay including: a pair of holding parts that are framework members of the headrest main body and molded integrally with the headrest main body, that are provided inside the headrest main body and arranged along the seat width direction to hold the headrest main body; and a pair of legs that are exposed from the headrest main body, that are arranged along the seat width direction, and that are attached to an upper end of the seat back; and a cloth-like bridging member that is spanned across the pair of holding parts in a tensioned state and that is molded integrally with the headrest main body, that suppresses backward movement of the occupant's head when a collision load is input to the headrest main body by the occupant's head. The bridging member is formed of a mesh fabric, and both ends of the bridging member are connected via a band made of a fabric material that maintains the tensile strength of the bridging member, forming a ring shape, and is a wrapping member that is wrapped around the pair of holding parts along the seat width direction. .

[0008] The headrest according to the invention recited in claim 1 comprises a headrest main body, a headrest stay, and a bridging member.

[0009] The headrest body is provided above the seat back of the vehicle seat, is made of foam, and supports the head of an occupant seated on the seat cushion.

[0010] The headrest stays are formed integrally with the headrest body as framework members of the headrest body, and include a pair of holding portions and a pair of legs. The pair of holding portions are provided inside the headrest body and are arranged along the seat width direction to hold the headrest body. The pair of legs are exposed from the headrest body, are arranged along the seat width direction, and are attached to the upper end of the seat back.

[0011] The bridging member is fabric-like and is bridging the pair of holding portions under tension. The bridging member is integrally molded with the headrest body, and because the bridging member is under tension, when a collision load is input to the headrest body by the occupant's head, a reaction force is applied to the occupant's head. As a result, in the present invention, the occupant's head is prevented from moving backward.

[0012] In other words, in the present invention, substantially the same effect as that obtained by the dilatant pad can be obtained by using the cloth-like bridging member in the headrest body, and therefore, in the present invention, it is possible to reduce costs compared to when the dilatant pad is used in the headrest body.

[0013] In the present invention, the headrest body is formed from a foaming agent such as urethane foam, and therefore the head of the occupant is normally supported by the headrest body. On the other hand, when a collision load is input to the headrest body by the occupant's head during a rear collision of the vehicle, a reaction force is applied to the occupant's head by the cloth-like bridging member, which makes it possible to suppress the backward movement of the occupant's head and support the occupant's head.

[0014] In the present invention, the cloth-like bridging member needs to have a predetermined tensile strength in order to apply a necessary reaction force to the occupant's head when a collision load is input to the headrest body. The bridging member may be made of resin fiber, a cloth material such as canvas, or even a nonwoven fabric. In the present invention, the bridging member is made of mesh fabric, and both ends of one bridging member are connected to each other via a band made of fabric material that maintains the tensile strength of the bridging member to form a ring shape. The bridging member is a wrapping member that is wrapped around the pair of holding parts in the seat width direction. By forming the bridging member from mesh fabric, the foaming agent is impregnated into the mesh fabric through small holes formed in the mesh fabric when foaming during molding of the headrest body, which improves the rigidity of the mesh fabric itself and suppresses deflection of the wrapping member when a collision load is input to the headrest body by the occupant's head during a rear-end collision, making it possible to ensure the reaction force applied by the bridging member to the occupant's head. The bridging member is formed in a ring shape and covers the pair of holding parts from the outside. By forming the bridging member in a ring shape, the bridging member can be wrapped around the pair of holding parts simply by inserting the ring-shaped bridging member into the pair of holding parts from the tip side of the pair of holding parts. Therefore, the present invention has better workability than, for example, a comparative example in which a long bridging member is wrapped around the pair of holding parts multiple times.

[0015] The headrest of the invention described in claim 2 is the headrest of the invention described in claim 1, wherein the pair of holding portions and the pair of leg portions are formed opposite each other in the fore-and-aft direction of the seat, and a connecting portion is bridged between the pair of holding portions along the width direction of the seat.

[0016] In the headrest according to the invention of claim 2, the pair of holding portions and the pair of leg portions are formed opposite to each other in the front-rear direction of the seat, and a connecting portion is bridged between the pair of holding portions along the seat width direction. This connecting portion can suppress deformation of the pair of holding portions and improve the rigidity of the headrest stay itself.

[0017] In other words, in the case of a rear-end collision of a vehicle, when a collision load is input to the headrest body by the head of an occupant, the present invention can suppress deformation of the pair of holding parts and ensure a reduction in the reaction force applied to the occupant's head by the bridging member. Note that it is more effective if the connecting part is bridged over the tips of the pair of holding parts.

[0018] Here, the connecting portion is not necessarily an essential component, but since the rigidity of the headrest stay itself can be improved by providing the connecting portion, it is not necessary to increase the rigidity of the pair of retaining portions themselves by, for example, increasing the thickness of the pair of retaining portions when the connecting portion is not provided. Therefore, in the present invention, by providing the connecting portion, it is possible to reduce costs by the amount that it is not necessary to increase the rigidity of the pair of retaining portions themselves.

[0028] Claim 3 The vehicle seat according to the invention described in claim 1 includes a seat cushion on which an occupant sits, a seat back that supports the upper body of the occupant seated on the seat cushion, and a seat cushion provided above the seat back. or Claim 2 to and the headrest described above.

[0029] Claim 3In the vehicle seat according to the invention described in (1), a bridge member is wrapped around a pair of holders provided inside a headrest disposed above a seat back that supports the upper body of an occupant seated on a seat cushion. The bridge member applies a reaction force to the occupant's head when a collision load is input to the headrest body. That is, in this invention, the bridge member is used in the headrest body instead of a dilatant pad. This allows for cost reduction compared to when a dilatant pad is used in the headrest body.

[0030] In addition, in the present invention, since the headrest body is formed from a foaming agent such as urethane, the head of the occupant is normally supported by the headrest body. On the other hand, when a collision load is input to the headrest body by the occupant's head during a rear collision of the vehicle, a reaction force is applied to the occupant's head by the bridge member, which prevents the occupant's head from moving backward and makes it possible to support the occupant's head. [Effects of the Invention]

[0031] As described above, the headrest according to claim 1 can support the head of an occupant while preventing the head from moving backward during a rear-end collision of the vehicle, and can be manufactured inexpensively.

[0032] According to the headrest of claim 2, deformation of the pair of holding portions can be suppressed, and the rigidity of the framework of the headrest body itself can be improved.

[0037] Claim 3 The vehicle seat described in the above is capable of supporting the occupant's head while preventing the occupant's head from moving backward during a rear-end collision of the vehicle, and can be manufactured inexpensively. [Brief explanation of the drawings]

[0038] [Figure 1]1 is a side view showing an upper end portion of a seat back and a headrest of a vehicle seat according to the present embodiment, as viewed from the left side of the seat. FIG. [Figure 2] 1 is a perspective view showing a headrest according to an embodiment of the present invention as viewed obliquely from the front side. [Figure 3] 1 is a perspective view showing a headrest according to the present embodiment as viewed obliquely from the rear side. [Figure 4] 1 is a perspective view showing a state in which an annular mesh fabric is inserted into a headrest stay of a headrest according to the present embodiment. FIG. [Figure 5] FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Figure 6] FIG. 3 is a perspective view showing a modified example of the headrest according to the present embodiment, and corresponds to FIG. 2. [Figure 7] FIG. 4 is a perspective view showing a modified example of the headrest according to the present embodiment, and corresponds to FIG. [Figure 8] FIG. 5 is a perspective view showing a modified example of the headrest according to the present embodiment, and corresponds to FIG. [Figure 9] FIG. 6 is a perspective view showing a modified example of the headrest according to the present embodiment, and corresponds to FIG. DETAILED DESCRIPTION OF THE INVENTION

[0039] Hereinafter, a headrest according to an embodiment of the present invention will be described with reference to the drawings. Note that the arrows FR, UP, and RH shown in each drawing indicate the front (direction of travel), the top, and the right of the vehicle, respectively. Hereinafter, when the directions of front-rear, left-right, and up-down are simply used in the description, they refer to front-rear in the front-rear direction of the vehicle, left-right in the left-right direction of the vehicle (vehicle width direction), and up-down in the up-down direction of the vehicle, unless otherwise specified.

[0040] (Headrest configuration) As shown in FIG. 1, a vehicle seat 10 includes a seat cushion (not shown) on which an occupant sits, a seat back 12 that stands upright from the rear end of the seat cushion and supports the upper body of the occupant seated on the seat cushion, and a headrest 14 that is attached to an upper end 12A of the seat back 12 and supports the head of the occupant seated on the seat cushion.

[0041] Here, the headrest 14 according to this embodiment will be described.

[0042] The headrest 14 comprises a headrest stay 16 which is a skeletal member, a headrest pad (headrest main body) 18 which is formed from a foaming agent such as urethane foam and is elastically deformable, and a headrest trim which forms the design surface, although not shown.

[0043] The headrest stay 16 is formed, for example, by bending a metal pipe material into a shape that forms a substantially inverted J when viewed from the left side, and is molded integrally with the headrest pad 18. The headrest stay 16 is broadly divided into a front portion 16A and a rear portion 16B, and as shown in Fig. 2, the front portion 16A of the headrest stay 16 includes a pair of holding portions 20, 22 that are arranged along the seat width direction, and a connecting portion 24 is bridged across the tips of the pair of holding portions 20, 22 along the seat width direction.

[0044] The rear portion 16B of the headrest stay 16 includes a pair of legs 26, 28 arranged along the seat width direction, and the pair of holding portions 20, 22 and the pair of legs 26, 28 are formed opposite each other in the seat front-rear direction. The pair of holding portions 20, 22 and the pair of legs 26, 28 are connected by connecting portions 30, 32, respectively. The pair of holding portions 20, 22 and the connecting portions 30, 32 are provided inside the headrest pad 18, and the pair of legs 26, 28 are exposed to the outside of the headrest pad 18.

[0045] On the other hand, the headrest pad 18 has a generally rectangular shape that is slightly longer in the seat vertical direction than in the seat width direction when viewed from the front, and is generally in an inverted L shape when viewed from the left side.

[0046] The headrest pad 18 is configured to include a vertical wall portion 34 that supports the head of the occupant, and an upper wall portion 36 that is provided on the upper part of the vertical wall portion 34 and bends toward the rear of the seat, the skeletal member of the vertical wall portion 34 being mainly constituted by a pair of retaining portions 20, 22, and the skeletal member of the upper wall portion 36 being mainly constituted by a pair of connecting portions 30, 32. A pair of legs 26, 28 hang down from the lower surface of the upper wall portion 36, and the pair of legs 26, 28 are attached to the upper end portion 12A of the seat back 12.

[0047] In this embodiment, as shown in Fig. 4, the pair of holding portions 20, 22 are covered from the outside with a ring-shaped mesh fabric (bridge member) 38 in a tensioned state. As shown in Figs. 3 and 5, both longitudinal ends 38A, 38B of the mesh fabric 38 are sewn to a band 40 formed of a strip-shaped cloth material via stitching portions 42, 44, respectively, thereby forming the mesh fabric 38 into a ring shape. Note that the mesh fabric 38 and the band 40 may be integrated by welding or the like, instead of sewing.

[0048] In order to maintain the tensile strength of the mesh fabric 38, the sewn portions 42, 44 of the mesh fabric 38 do not sew both ends 38A, 38B of the mesh fabric 38 together, but rather sew the both ends 38A, 38B of the mesh fabric 38 together via a band 40 made of a cloth material. In this embodiment, for example, polyester, nylon, etc. are used as the mesh fabric 38. Polyester, nylon, etc. are considered to be fabrics that are less stretchy than other mesh fabrics and have high tensile strength (approximately 45 to 65 MPa).

[0049] 4, the mesh fabric 38 is inserted into the pair of retaining portions 20, 22 from below, the annular mesh fabric 38 covers the pair of retaining portions 20, 22 from the outside in a tensioned state, and the headrest stay 16 and the headrest pad 18 are integrally molded with each other using a foaming agent. Because the mesh fabric 38 is made of a fabric with high tensile strength, when a collision load is input to the headrest pad 18 by the occupant's head, a reaction force is applied to the occupant's head.

[0050] (Action and effect of headrest) Next, the operation and effects of the headrest 14 according to this embodiment will be described.

[0051] 2, in this embodiment, the headrest 14 includes a headrest pad 18, a headrest stay 16, and an annular mesh fabric 38. The headrest pad 18 is provided above the seat back 12 of the vehicle seat 10, is formed from a foaming agent, and supports the head of an occupant seated on a seat cushion (not shown).

[0052] The headrest stay 16 is a framework member of the headrest pad 18, is molded integrally with the headrest pad 18, and includes a pair of holding portions 20, 22 and a pair of leg portions 26, 28. The pair of holding portions 20, 22 are provided inside the headrest pad 18, are arranged along the seat width direction, and hold the headrest pad 18. The pair of leg portions 26, 28 are exposed from the lower side of the headrest pad 18, are arranged along the seat width direction, and are attached to the upper end of the seat back 12.

[0053] The annular mesh fabric 38 covers the pair of holding portions 20, 22 from the outside while being tensioned, and is molded integrally with the headrest pad 18, so that when a collision load is input by the occupant's head to the headrest pad 18, a reaction force is applied to the occupant's head. As a result, in this embodiment, the occupant's head is prevented from moving backward.

[0054] That is, in this embodiment, substantially the same effect as that obtained by the dilatant pad in the headrest pad 18 can be obtained by using the annular mesh fabric 38. Therefore, in this embodiment, it is possible to reduce costs compared to when the dilatant pad is used in the headrest pad 18.

[0055] In the headrest 14 of this embodiment, the headrest pad 18 is formed from a foaming agent such as urethane foam, and therefore, under normal circumstances, the occupant's head is supported by the headrest pad 18. On the other hand, in the event of a rear-end collision of the vehicle, when a collision load is input to the headrest pad 18 by the occupant's head, a reaction force is applied to the occupant's head by the annular mesh fabric 38, which prevents the occupant's head from moving backward and makes it possible to support the occupant's head.

[0056] In this embodiment, the pair of holding portions 20, 22 and the pair of leg portions 26, 28 are formed opposite to each other in the front-rear direction of the seat, and a connecting portion 24 is bridged along the seat width direction from the tips of the pair of holding portions 20, 22. This connecting portion 24 can suppress deformation of the pair of holding portions 20, 22 and improve the rigidity of the headrest stay 16 itself.

[0057] As a result, in this embodiment, when a collision load is input to the headrest pad 18 by the occupant's head during a rear-end collision of the vehicle, it is possible to suppress deformation of the pair of holding portions 20, 22 and ensure a reduction in the reaction force applied to the occupant's head by the mesh fabric 38. In other words, in this embodiment, when a collision load is input to the headrest pad 18 by the occupant's head during a rear-end collision of the vehicle, it is possible to suppress a reduction in the reaction force by the mesh fabric 38.

[0058] Furthermore, in this embodiment, since the mesh fabric 38 is formed in a ring shape, it is possible to wrap a bridging member around the pair of holding parts 20, 22 simply by inserting the ring-shaped mesh fabric 38 into the pair of holding parts 20, 22 from the tip (connecting part 24) side of the pair of holding parts 20, 22. Therefore, in this embodiment, workability is better than, for example, a comparative example (not shown) in which a long bridging member is wrapped around the pair of holding parts 20, 22 multiple times.

[0059] In this embodiment, the bridging member is made of a mesh fabric 38. When the headrest pad 18 is molded using the mesh fabric 38, the foaming agent is impregnated into the mesh fabric 38 through small holes formed in the mesh fabric when the foaming agent is foamed.

[0060] This improves the rigidity of the mesh fabric 38 itself, and when a collision load is input to the headrest pad 18 by the head of an occupant in a rear collision of the vehicle, it is possible to suppress deflection of the mesh fabric 38 and ensure the reaction force applied to the head of the occupant by the mesh fabric 38. Note that the bridging member is not limited to the mesh fabric 38, as long as it can ensure the required rigidity and strength.

[0061] (Other embodiments) In the above embodiment, as shown in FIG. 2, a ring-shaped mesh fabric 38 is wrapped around a pair of holding portions 20, 22, but this is not limited to this, as long as a bridging member is bridging the pair of holding portions 20, 22 along the seat width direction.

[0062] 6 and 8, for example, a bag-shaped mesh fabric 50 may be wrapped around a pair of holding parts 20, 22 to form a headrest 48. By forming the mesh fabric 50 in a bag shape in this way, the mesh fabric 50 can be wrapped around the pair of holding parts 20, 22 simply by inserting the bag-shaped mesh fabric 50 into the pair of holding parts 20, 22 from the tip (connecting part 24) side of the pair of holding parts 20, 22.

[0063] Furthermore, when the bag-shaped mesh fabric 50 is inserted from the connecting portion 24 side of the pair of holding portions 20, 22, the movement of the mesh fabric 50 is restricted when the innermost portion of the mesh fabric 50 comes into contact with the connecting portion 24. This allows the positioning of the mesh fabric 50. In other words, in the case of the bag-shaped mesh fabric 50, the innermost portion of the mesh fabric 50 comes into contact with the connecting portion 24, thereby allowing the mesh fabric 50 to be positioned in the insertion direction.

[0064] Here, in this embodiment, as shown in Figures 7 and 9, the mesh fabric 50 is formed so that the area along the seat width direction on the front surface 50A side is larger than the area along the seat width direction on the rear surface 50B side, and when the mesh fabric 50 is folded up and down, the pair of holding portions 20, 22 are covered on the front surface 50A side, and the front surface 50A side is sewn to the rear surface 50B side.

[0065] In addition, cutouts 52, 54 are formed at the corners of the mesh fabric 50, and when the bag-shaped mesh fabric 50 is wrapped around the pair of holding parts 20, 22, the corners 20A, 22A formed by the pair of holding parts 20, 22 and the connecting part 24 of the headrest stay 16 can be exposed through the cutouts 52, 54.

[0066] In addition to the above, it goes without saying that a long wrapping member may be wound multiple times around the pair of holding portions 20, 22. In this way, by winding a long wrapping member multiple times, it becomes possible to adjust the rigidity of the bridging member formed by the wrapping member.

[0067] In this embodiment, an example in which the vehicle seat is applied to a rear seat has been described, but it goes without saying that the present invention may also be applied to a front seat.

[0068] In addition, the present invention can be implemented in various modifications without departing from the spirit and scope of the present invention. Furthermore, it goes without saying that the scope of the present invention is not limited to the above-described embodiments. [Explanation of symbols]

[0069] 10 Vehicle seats 12 Seat back 12A Upper end (upper end of seat back) 14 Headrest 16 Headrest stay 18 Headrest pad 20 Retaining part (headrest stay) 22 Retaining part (headrest stay) 24 Connecting part 26 Legs (headrest stay) 28 Legs (headrest stay) 38 Mesh fabric (bridge member) 48 Headrest 50 mesh fabric (bridge member)

Claims

1. a headrest body provided above a seat back of a vehicle seat and made of a foaming agent, the headrest body supporting the head of an occupant seated on a seat cushion; a headrest stay that is a framework member of the headrest body, is molded integrally with the headrest body, and includes a pair of holding portions that are provided inside the headrest body and arranged along the seat width direction to hold the headrest body, and a pair of legs that are exposed from the headrest body, are arranged along the seat width direction, and are attached to an upper end of the seat back; a cloth-like bridging member that is bridging the pair of holding portions in a tensioned state, is molded integrally with the headrest body, and suppresses backward movement of the occupant's head when a collision load is input to the headrest body by the occupant's head; and The bridging member is formed of mesh fabric, and both ends of one bridging member are connected via a band made of a cloth material that maintains the tensile strength of the bridging member, forming a ring shape, and the headrest is a wrapping member that is wrapped around the pair of holding portions along the seat width direction.

2. The headrest according to claim 1, wherein the pair of holding portions and the pair of leg portions are formed opposite to each other in the front-rear direction of the seat, and a connecting portion is bridged between the pair of holding portions along the seat width direction.

3. A seat cushion on which an occupant sits; a seat back that supports the upper body of an occupant seated on the seat cushion; the headrest according to claim 1 or 2, which is disposed above the seat back; A vehicle seat comprising:

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