Vehicular seat

Abstract

To provide a vehicular seat which can improve appearance quality.SOLUTION: A vehicular seat 1 includes a trim cover 22, a cushion pad 21 covered with the trim cover 22, and a seat heater 5 which is arranged between the trim cover 22 and the cushion pad 21, wherein the seat heater 5 has a heat generator 53, and a sheet-like base fabric material 50 provided with the heat generator 53, the base fabric material 50 includes a first member 51 arranged on the trim cover 22 side, and a second member 52 which is arranged on a side closer to the cushion pad 21 side than the first member 51 and where the heat generator 53 is fixed to the surface on the cushion pad 21 side, and the second member 52 has rigidity higher than that of the first member 51.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] Patent Document 1 describes a seat heater unit in which a flexible urethane foam sheet layer is laminated on at least one side of a fibrous base material to produce a composite sheet, and an electric heating wire is sewn and fixed to the flexible urethane foam sheet layer side of the composite sheet.

[0003] Patent Document 2 describes a flexible PTC heating element comprising electrodes formed by printing, a PTC resistor formed by printing and powered by the electrodes, a flexible substrate impregnated with a portion of the electrodes and a portion of the PTC resistor, and a flexible covering material that covers at least the electrodes and the PTC resistor and is joined to the flexible substrate.

[0004] Patent Document 3 describes a sheet heating element comprising an electrically insulating substrate, a pair of electrodes arranged on the substrate, a resin composition crosslinked via either oxygen or nitrogen, and a polymer resistor containing at least either a fibrous conductor or a flaky conductor mixed into the resin composition and electrically connected to the pair of electrodes.

[0005] Patent Document 4 describes a resistor composition comprising at least a crystalline resin composition, two or more different types of conductors, a flame retardant, a coupling agent, and an organic peroxide.

[0006] Patent Document 5 describes a resistor composition that includes at least a crystalline resin, a reactive resin, an elastomer, two or more different types of conductors, and a flame retardant. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 3879592 [Patent Document 2] International Publication No. 2004 / 001775 [Patent Document 3] International Publication No. 2007 / 110976 [Patent Document 4] JP 2010-129425 A [Patent Document 5] JP 2008-293670 A Summary of the Invention [Problem to be solved by the invention]

[0008] An object of the technique disclosed herein is to provide a vehicle seat that can improve the appearance quality. [Means for solving the problem]

[0009] A vehicle seat according to one embodiment of the technology disclosed herein comprises an upholstery material, a pad covered with the upholstery material, and a heater disposed between the upholstery material and the pad, the heater having a heating element and a sheet-shaped base fabric material on which the heating element is provided, the base fabric material including a first member disposed on the upholstery material side, and a second member disposed on the pad side of the first member and having the heating element fixed to its surface on the pad side, the second member being more rigid than the first member. Effect of the Invention

[0010] According to the technique of the present disclosure, it is possible to improve the appearance quality of a vehicle seat. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is an external perspective view showing a schematic configuration of a vehicle seat 1 according to one embodiment of the technology of the present disclosure. [Diagram 2] FIG. 2 is an exploded view showing a cross section taken along the line AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] 1 is an external perspective view showing a schematic configuration of a vehicle seat 1 according to an embodiment of the technology of the present disclosure. In this specification, the term "vehicle" includes automobiles, airplanes, trains, mobile drones, ships, and the like.

[0013] The vehicle seat 1 includes a seat cushion 2 that supports the buttocks and thighs of a seated occupant, a seat back 3 that supports the waist and back of the seated occupant, and a headrest 4 that supports the head of the seated occupant. In the example of Fig. 1, the vehicle seat 1 is a driver's seat or a passenger's seat of an automobile, but it may also be a bench seat in the back seat, etc.

[0014] The seat cushion 2 has a frame (not shown) that forms a skeleton, and this frame is covered with a cushion pad 21 made of a relatively soft resin foam material such as urethane foam, and is further covered with a trim cover 22 including a skin material such as leather, woven fabric, or nonwoven fabric. The skin material has a single layer structure or a multi-layer structure.

[0015] The seat back 3 has a frame (not shown) that forms a skeleton, and this frame is covered with a cushion pad 31 made of a relatively soft resin foam material such as urethane foam, and further covered with a trim cover 32 including a skin material such as leather, woven fabric, or nonwoven fabric. The skin material has a single layer structure or a multi-layer structure.

[0016] The seat cushion 2 has a built-in seat heater 5 for heating the seat surface. The seat heater 5 may be built into the seat back 3 in order to heat the backrest surface of the seat back 3.

[0017] Fig. 2 is an exploded view showing a cross section taken along the line AA in Fig. 1. In the example shown in Fig. 2, the trim cover 22 has a so-called Ramirez structure made up of only a skin material. Although trim covers that combine a skin material with wadding are also known, the trim cover 22 shown in Fig. 2 does not include wadding and is made up of a skin material alone. The trim cover 22 may have a structure in which a skin material and wadding are combined, and is not limited to the structure shown in Fig. 2.

[0018] The seat heater 5 is provided between the trim cover 22 and the cushion pad 21 of the seat cushion 2, and is in the form of a sheet. The seat heater 5 includes a sheet-shaped base fabric material 50, and a heating element 53 formed in a predetermined pattern on the base fabric material 50. An end of the heating element 53 is drawn out to the outside of the vehicle seat 1, and is connected in series to a battery and an operation switch externally. By closing the operation switch, a current flows through the heating element 53, and the heating element 53 generates heat. In one example, the heating element 53 is made of an electric resistance wire having a predetermined resistance value, such as a nichrome wire.

[0019] The base fabric material 50 of the seat heater 5 includes a first member 51 disposed on the trim cover 22 side, and a second member 52 disposed on the cushion pad 21 side of the first member 51. A heating element 53 is fixed to a surface of the second member 52 on the cushion pad 21 side.

[0020] The second member 52 is preferably made of a flame-retardant or non-combustible fiber material. From the viewpoint of manufacturing costs, the second member 52 is more preferably made of a woven or non-woven fabric using a flame-retardant fiber material, for example, a cotton and rayon blend fabric. The second member 52 may be made of nylon, modacrylic, polyvinyl chloride, polyvinylidene chloride, fluorine fiber, flame-retardant polyester, aramid, PBO (polyparaphenylene benzobisoxazole), polyarylate, polyimide, or the like.

[0021] The first member 51 is configured to have lower rigidity than the second member 52, and is made of, for example, urethane foam, urethane nonwoven fabric, or resin. Of the components of the seat heater 5, the heating element 53 has the highest rigidity. The second member 52 has lower rigidity than the heating element 53 and higher rigidity than the first member 51. The first member 51 is configured to have lower flame retardancy than the second member 52, which increases the freedom of material selection. As shown in FIG. 2, the first member 51 is preferably configured to be thicker than the second member 52 (for example, three or more times, preferably five or more times thick).

[0022] The surface of the seat heater 5 on the heating element 53 side is fixed to the cushion pad 21 with double-sided tape 61. In other words, the second member 52 and the heating element 53 are fixed to the cushion pad 21 with the double-sided tape 61. In addition, the surface of the seat heater 5 on the first member 51 side is fixed to the trim cover 22 with an adhesive 62. The back surface of the skin material of the trim cover 22 (the surface opposite to the surface that comes into contact with the seat occupant) is directly fixed to the first member 51 with the adhesive 62.

[0023] In the vehicle seat 1 configured as described above, in the seat heater 5, the rigidity of the second member 52 is higher than that of the first member 51, so that deformation of the second member 52 caused by the pattern of the heating element 53 is reduced, and as a result, deformation of the first member 51 is also suppressed. This makes it possible to prevent the pattern shape of the heating element 53 from appearing on the surface of the trim cover 22, thereby improving the appearance quality of the seat and the seating comfort.

[0024] 2, a reference configuration is assumed in which the arrangement of the first member 51 and the second member 52 is reversed. In this reference configuration, since the rigidity of the first member 51 is low, a deformation corresponding to the pattern of the heating element 53 occurs on the surface of the first member 51, and the second member 52 is also deformed due to the deformation. As a result, the pattern shape of the heating element 53 appears on the surface of the trim cover 22.

[0025] In contrast to this reference configuration, according to the configuration shown in Fig. 2, the deformation of the base fabric material 50 caused by the heating element 53 is suppressed by the second member 52 having high rigidity. Even if the second member 52 is somewhat deformed corresponding to the pattern of the heating element 53, the first member 51 having low rigidity is present between the second member 52 and the trim cover 22, so that the deformation can be prevented from being reflected in the trim cover 22. In particular, by making the thickness of the first member 51 larger than the thickness of the second member 52 as shown in Fig. 2, the deformation can be further prevented from being reflected in the trim cover 22. As a result, the appearance quality and seating comfort of the vehicle seat 1 can be improved.

[0026] In this way, since deformation of the base fabric material 50 can be suppressed, the appearance quality can be sufficiently improved even when a trim cover 22 without wadding is used. By making the trim cover 22 wadding-less, the weight and cost of the seat can be reduced. In addition, the degree of freedom in design can be improved.

[0027] Furthermore, in the above-described reference configuration, since the surface of the base fabric material 50 facing the trim cover 22 is highly rigid, there is a possibility that the shape of the edge of that surface will be reflected on the surface of the trim cover 22. In contrast, according to the configuration shown in FIG. 2, since the first member 51 is present between the second member 52 and the trim cover 22, it is possible to prevent the shape of the edge of the second member 52 from appearing on the trim cover 22.

[0028] In the seat heater 5, the second member 52 and the heating element 53, which have high rigidity, and the cushion pad 21, which has lower rigidity than the second member 52 and the heating element 53, are fixed to each other by the double-sided tape 61. Therefore, compared to the above-mentioned reference configuration, the fixed state between the seat heater 5 and the cushion pad 21 can be maintained better.

[0029] As a result of intensive research by the inventors, in the seat heater 5, for example, the diameter of the heating element 53 is in the range of 1.0 mm or more and 1.2 mm or less, and the first member 51 is made of ether-based soft polyurethane foam (density: 30±3 [kg / m 3]), and the second member 52 is made of a cotton and rayon blend fabric (weight (basis weight): 75±5 [gm 2 It has been found that the appearance quality of the vehicle seat 1 can be sufficiently improved when the first member 51 is made of a material having a thickness of about 5 times the thickness of the second member 52, and the knitting strength is 50 [N / 5cm] or more both vertically and horizontally, and the thickness of the first member 51 is about 5 times the thickness of the second member 52. Note that these numerical values ​​and materials are merely examples and are not limited to these. However, from the viewpoints of seating comfort, manufacturing costs, and heating performance, it is more preferable to adopt the numerical values ​​and materials mentioned above.

[0030] As described above, this specification discloses the following items. Note that, in parentheses, the components corresponding to those in the above-mentioned embodiment are shown, but the present invention is not limited to these.

[0031] (1) A skin material (trim cover 22); A pad (cushion pad 21) covered with the above-mentioned skin material; a heater (seat heater 5) disposed between the cover material and the pad, The heater includes a heating element (heating element 53) and a sheet-like base fabric material (base fabric material 50) on which the heating element is provided, The base fabric material includes a first member (first member 51) arranged on the skin material side, and a second member (second member 52) arranged on the pad side of the first member and having the heating element fixed to a surface on the pad side, The second member has a higher rigidity than the first member.

[0032] (2) A vehicle seat as described in (1), The first member has a thickness greater than that of the second member.

[0033] (3) A vehicle seat according to (1) or (2), The first member is made of urethane foam, The second member is a vehicle seat made of cotton and rayon.

[0034] (4) A vehicle seat according to any one of (1) to (3), The vehicle seat, wherein the cover material has a back surface opposite to a surface that comes into contact with a seated occupant, and the back surface is directly bonded to the first member.

[0035] (5) A vehicle seat according to any one of (1) to (4), The vehicle seat, wherein the pad, the second member and the heating element are secured together by double-sided tape. [Explanation of symbols]

[0036] 1 Vehicle seat 2 Seat cushion 3 Seat back 4 Headrest 5 Seat heater 21,31 Cushion pad 22,32 Trim cover 50 Base material 51 First member 52 Second member 53 Heating element 61 Double-sided tape 62 Adhesive

Claims

1. A skin material; A pad covered with the skin material; a heater disposed between the cover material and the pad; The heater includes a heating element and a sheet-like base fabric material on which the heating element is provided, the base fabric material includes a first member arranged on the skin material side, and a second member arranged on the pad side of the first member and having the heating element fixed to a surface on the pad side, The second member has a higher rigidity than the first member.

2. 2. The vehicle seat according to claim 1, The vehicle seat, wherein the first member is thicker than the second member.

3. 3. The vehicle seat according to claim 1 or 2, The first member is made of urethane foam, The second member is made of cotton and rayon.

4. 3. The vehicle seat according to claim 1 or 2, The vehicle seat, wherein the back surface of the covering material opposite to the surface that contacts a seat occupant is directly bonded to the first member.

5. 3. The vehicle seat according to claim 1 or 2, The pad, the second member and the heating element are fixed to each other by double-sided tape.

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