JP6284877B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat including a seat pad, a seat cover, and a planar seat heater that is interposed between the seat pad and can heat a seating surface of the seat cover.

  As this type of vehicle seat, a vehicle seat including a seat cushion, a seat back, and a planar seat heater is known (see Patent Document 1). Each of the seat cushion and the seat back includes a seat pad that elastically supports an occupant and a seat cover that covers the seat pad. A convex portion is formed at the center of each seat pad, and the convex portion is disposed at a location facing the rear midline of the occupant. The sheet heater is a planar heating element having flexibility to generate heat when energized, and is formed by meandering heater wires on a belt-like base fabric. And in a well-known technique, a seat heater is arrange | positioned along the back midline of the passenger | crew who is a formation position of a convex part, interposing between a seat pad and a seat cover. Thus, by heating only the rear midline of the occupant with the seat heater, the heating energy is reduced and the energy saving effect is excellent.

JP 2009-247634 A

  By the way, in the field of vehicle seats, fine control such as locally heating the occupant is required in consideration of the fact that there are portions where the occupant's body tends to feel heat and other portions. However, in the known technology, the seat heater is arranged along the formation position of the convex portion, and the rear midline of the occupant is heated in a wide range and uniformly. For this reason, in the configuration of the known technique, for example, the configuration is somewhat unsuitable for heating the posterior midline of the occupant partially or locally. Further, in the known technology, an extreme temperature difference is generated between the seat heater placement location and the non-location location, and the configuration tends to be slightly inferior in comfort. The present invention has been devised in view of the above points, and the problem to be solved by the present invention is to warm the seating surface of the seat finely and comfortably with a seat heater.

  As means for solving the above problems, a vehicle seat according to a first aspect of the present invention includes a seat pad that elastically supports an occupant, a seat cover that covers the seat pad, and a planar seat heater that generates heat when energized. Prepare. The seating surface of the seat cover has a pressed portion that is pressed by the occupant with the occupant seated as a reference, and the pressed portion is heated by a seat heater interposed between the seat pad and the seat cover. Is possible. In this type of configuration, it is desirable that the pressed portion, which is the seating surface of the seat, can be finely and comfortably heated by the seat heater.

Therefore, in the present invention, the pressed portion is arranged so as to be able to face the sacrum of the occupant, the second area arranged around the first area and adjacent thereto, and other than the first area and the second area It is divided into the 3rd area arrange | positioned in this part, and it is the structure which can heat a to-be-pressed part finely. The seat heater allows the temperature of the first area, the second area, and the third area to be adjusted while providing a temperature difference between these areas, and the temperature of the first area is set to be the highest. The area temperature is set to the lowest. In the present invention, by heating the entire area with the seat heater, it is possible to suitably avoid that the pressed part is heated as a whole and an excessive temperature difference is generated in the part. In addition, by increasing the temperature difference between the first area and the second area, it is possible to make the passenger feel the temperature of the first area high.

  According to the first aspect of the present invention, the seating surface of the seat can be warmed finely and comfortably by the seat heater.

It is a perspective view of a vehicle seat. It is a perspective view of the vehicle seat which shows a to-be-pressed part and its area. It is a schematic front view of a 1st sheet heater. It is a schematic front view of a 2nd sheet heater. It is a schematic diagram which shows a part of crew member's skeleton. It is the schematic which shows a part of vehicle seat.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each figure, the reference symbol F is in front of the vehicle seat, reference symbol B is in the rear of the vehicle seat, reference symbol UP is in the upper part of the vehicle seat, reference symbol DW is in the lower part of the vehicle seat, reference symbol R is on the right side of the vehicle seat, A symbol L is attached to the left side of the sheet. The vehicle seat 2 in FIG. 1 includes a seat cushion 4, a seat back 6, and a headrest 8. Each of these seat constituent members includes a seat frame (4F, 6F, 8F) forming a seat skeleton, a seat pad (4P, 6P, 8P) forming a seat outer shape, and a seat cover (4S, 6S, 8S). In this embodiment, the lower portion of the seat back 6 is connected to the rear portion of the seat cushion 4 so as to be able to rise and fall, and the headrest 8 is disposed on the upper portion of the seat back 6 in the standing state.

  1 and 2, the seat cushion 4 includes the above-described basic configurations 4F, 4P, 4S, the first seat heater SH1, and a plurality of pressed portions 11, 12r, 12l (each member and the like). Details will be described later). The seat back 6 also includes the above-described basic configurations 6F, 6P, 6S, the second seat heater SH2, and a plurality of pressed portions 13, 14r, 14l (details of each member will be described later). Here, each pressed portion (details will be described later) is a seating surface portion of each seat cover 4S, 6S that receives pressure from an occupant during seating. As will be described later, a part (11, 13) of the pressed portion is heated by the respective seat heaters SH1, SH2. In this type of seat configuration, the seating of the seat is performed by the respective seat heaters SH1, SH2. It is desirable that a part (11, 13) of each pressed portion that is a surface can be heated finely and comfortably. Therefore, in this embodiment, a part (11, 13) of each pressed portion is heated finely and comfortably with the configuration described later. Hereinafter, each configuration will be described in detail.

[Seat cushion]
1 and 2, the seat cushion 4 is formed by covering a seat cover 4S on a seat pad 4P on a seat frame 4F (in the drawings, only the seat cover appears on the surface and is illustrated). ) Here, the seat frame 4F (not shown) is a frame body having a shape that follows the outer shape of the seat cushion 4, and can be formed of a material (metal, hard resin, etc.) having excellent rigidity. The seat cover 4S is a surface material that covers a seating side of a seat pad 4P to be described later to form a seating surface, and a plurality of pressed portions 11, 12r, and 121 (details will be described later) are formed. The material of the seat cover 4S is not particularly limited, and examples thereof include fabric (woven fabric, knitted fabric, non-woven fabric) and leather (natural leather, synthetic leather).

The seat pad 4P (not shown) is a member that elastically supports an occupant by forming a seat outer shape, and can be formed of a foamed resin such as polyurethane foam (density: 10 kg / m ^{3 to} 40 kg / m ³ ). The seat pad 4P of the present embodiment has a substantially rectangular shape when viewed from above, and has a top plate main portion 4a and a top plate side portion 4b with reference to FIG. The top plate main portion 4a is a central portion of the seat pad 4P in the seat width direction and can be seated by an occupant. Moreover, the top plate side part 4b is a convex part arrange | positioned to the side of the top plate main part 4a, and can support a passenger | crew's side part at the time of cornering driving | running | working, for example.

[Pressed part]
The pressed part of the seat cushion 4 is a part of a seating surface pressed by a seated occupant with reference to FIG. 2, and the first pressed part 11 corresponding to the pressed part of the present invention and the second pressed part. It has pressed parts 12r and 12l. The first pressed part 11 is a part that is pressed from an occupant body part such as a buttocks or a leg part during normal running, and is formed on the seating surface of the top plate main part 4a. The first pressed portion 11 has a rear portion that is exclusively pressed from the buttocks in a substantially rectangular shape when viewed from above, and the front portion that is exclusively pressed from the leg portion extends in front of the seat while being divided into two forks. The second pressed portions 12r and 12l are portions pressed by the occupant during cornering traveling or the like, and are formed on the inner surface of each top plate side portion 4b and have a substantially rectangular shape that is long in the longitudinal direction of the seat. .

[First Area, Second Area, Third Area]
Then, referring to FIG. 2, the first pressed portion 11 takes into account that there is a portion that easily feels heat in the occupant body part (in this embodiment, the sacrum 50 of the occupant CM shown in FIG. 5). The area can be divided into a first area CA1, a second area CA2, and a third area CA3. Here, referring to FIG. 5, the sacrum 50 of the occupant CM is a triangular bone disposed at the lower part of the spine, and is a portion where the occupant easily feels heat. Therefore, the first area CA1 of the present embodiment is a substantially circular portion in a top view formed in the center of the rear portion of the first pressed portion 11 with reference to FIG. 2 and FIG. Arrange to face each other. Moreover, 2nd area CA2 is a site | part arrange | positioned around the 1st area CA1, and adjoining it with reference to FIG. 2, and the rear part of the 1st to-be-pressed part 11 except 1st area CA1 in a present Example. It is formed on almost the entire surface. And 3rd area CA3 is a site | part arrange | positioned in parts other than 1st area CA1 and 2nd area CA2, and is formed in the front part substantially whole surface of the 1st to-be-pressed part 11 in a present Example.

[First seat heater]
The first sheet heater SH1 can generate heat by energization with reference to FIGS. 1 and 3, and is typically a sheet-like or mat-like surface material. The first sheet heater SH1 of the present embodiment is a surface material that is substantially the same shape and size as the top plate main portion 4a, and includes a heater wire 30, a base material 31 that forms a main body, a thermostat 32, and a plurality of lead wires 34a. To 34d and a pair of connectors 36a and 36b. Although the material of the base material 31 is not specifically limited here, It is preferable to form with the material provided with flexibility, such as a cloth, leather, and a soft resin. And the heater wire 30 which consists of a single wire, and the thermostat 32 are attached to one surface of the base material 31 of 1st sheet | seat heater SH1 (details of these each member are mentioned later). Further, both ends of the heater wire 30 are electrically connected to a connector 36a outside the first seat heater SH1 via a pair of lead wires 34a and 34b. The pair of lead wires 34a and 34b are electrically connected to the other connector 36b via another pair of lead wires 34c and 34d on the way. The first sheet heater SH1 can generate heat by electrically connecting the connector 36a or another connector 36b to a power source (not shown) and energizing the heater wire 30. Note that the amount of heat generated and the temperature of the heater wire 30 can also be controlled by controlling the power supply amount of the power source to the heater wire 30 via a control unit such as an ECU (not shown).

  Here, the thermostat 32 is a member that controls the energization state of the heater wire 30. As this type of thermostat 32, bimetal type, electronic type, hydraulic type and rod / tube type thermostats 32 can be exemplified, and among them, a low cost and simple structure bimetal type thermostat 32 is preferable. By attaching the bimetal thermostat 32 in close contact with a part of the heater wire 30 on the first sheet heater SH1, the heater wire 30 can be switched between energization and non-energization.

  The heater wire 30 is a wire that can generate heat when energized, and examples of this type of wire include metal yarns such as copper and aluminum, alloy yarns such as nichrome wires, plated wires, and carbon fiber filaments. . The plated wire has a wire that serves as a non-conductive or conductive core, and a plated layer of metal or alloy. Carbon fibers are polyacrylonitrile-based carbon fibers (PAN-based carbon fibers) and pitch-based carbon fibers. A method for attaching the heater wire 30 to the first sheet heater SH1 is not particularly limited, and a method such as sewing, adhesion, fusion, weaving, or knitting can be appropriately selected. That is, the heater wire 30 can be attached to the base 31 of the first sheet heater SH1 by sewing, bonding, or fusion, and can also be used as part of the constituent yarn of the base 31 by weaving or knitting. it can.

  The heater wire 30 is substantially U-shaped when viewed from above with reference to FIG. 3 and is disposed on the base 31 of the first sheet heater SH1, and both ends of the heater wire 30 are connected to the first sheet heater. The lead wires 34a and 34b are connected to the center of the rear end of the SH1. And the 1st heating part 31a, the 2nd heating part 31b, and the 3rd heating part 31c are formed in the 1st sheet | seat heater SH1 when the heater wire 30 meanders with a suitable pitch on it. The first heating unit 31a is a portion where the heater wire 30 meanders in small increments and the pitch between the lines is the narrowest. The first heating portion 31a is disposed facing the first area CA1 with the first sheet heater being disposed as a reference, and heats it. To do. The first heating unit 31a can generate heat at the highest temperature when the heater wire length per unit area is the longest (the heater dose is the largest) in the first sheet heater SH1. The second area CA2 is a portion where the heater wire 30 is meandering and the pitch between the lines is the widest, and the second area CA2 is placed facing the second area CA2 and heated with reference to the time when the first sheet heater is provided. The second heating unit 31b can generate heat at the lowest temperature by making the heater wire length per unit area the shortest (the heater dose is the smallest). And the 3rd heating part 31c is a site | part which arrange | positions facing each 3rd area CA3 on the basis of the time of 1st sheet heater arrangement | positioning, and heats it. In the third heating unit 31c, the pitch between the heater wires 30 is narrower than that of the second heating unit 31b, and the heater wire length per unit area is longer than that of the second heating unit 31b.

[Seatback]
The basic configuration of the seat back 6 is substantially the same as the basic configuration of the seat cushion 4 with reference to FIG. Therefore, in the configuration of the seat back 6, about the same configuration as the configuration of the seat cushion 4, the detailed description is omitted by attaching the reference numerals corresponding to the configuration of the seat cushion 4. With reference to FIG. 2, a plurality of pressed portions 13, 14r, and 141 described later are formed on the top plate main portion 6a and the top plate side portion 6b of the seat back 6 (seat pad 6P).

[Pressed part]
The pressed part of the seat back 6 is a part of a seating surface pressed by a seated occupant with reference to FIG. 2, and a third pressed part 13 corresponding to the pressed part of the present invention, and a fourth It has pressed parts 14r and 14l. The third pressed part 13 is a part that is pressed from the occupant body part such as the waist part or the shoulder part during normal running, and is formed on the seating surface of the top plate main part 6a. The third pressed portion 13 is a substantially rectangular portion when viewed from the front, and is formed in a portion from the lower portion to the upper portion of the top plate main portion 6a. The fourth pressed parts 14r and 14l are parts that are pressed by the occupant during cornering traveling or the like. The fourth pressed portions 14r and 14l are each formed on the inner surface of each top plate side portion 6b with the seat back upright as a reference, and have a substantially rectangular shape that is long in the seat vertical direction.

[First Area, Second Area, Third Area]
Then, referring to FIG. 2, the third pressed portion 13 takes into account that there is a portion that easily feels heat in the occupant body part (in this embodiment, the sacrum 50 of the occupant CM shown in FIG. 5). The area can be divided into a first area BA1, a second area BA2, and a third area BA3. The first area BA1 of the present embodiment is a substantially circular portion in front view formed in the lower center of the third pressed portion 13 with reference to FIG. 2 and FIG. Arrange to face each other. In addition, the second area BA2 is a portion arranged around and adjacent to the first area BA1 with reference to FIG. 2, and in this embodiment, the lower portion of the third pressed portion 13 excluding the first area BA1. Is formed in the part from the top to the middle (directly below a third area BA3 described later). And 3rd area BA3 is a site | part arrange | positioned in parts other than 1st area BA1 and 2nd area BA2, and is formed in the upper both sides of the 3rd to-be-pressed part 13, respectively in a present Example.

[Second seat heater]
The second sheet heater SH2 is a face material that can generate heat when energized with reference to FIGS. 1 and 4. The second sheet heater SH2 of the present embodiment is a surface material that is substantially the same shape and size as the top plate main portion 6a, and has substantially the same configuration as the first sheet heater SH1 (heater wire 40, base material 41, thermostat 42, pair Lead wires 44a and 44b and a connector 46). And the heater wire 40 which consists of a single wire, and the thermostat 42 are provided in the one surface of the base material 41 of 2nd sheet | seat heater SH2 (details of the arrangement | positioning state of the heater wire 40 are mentioned later). Further, both ends of the heater wire 40 are electrically connected to a connector 46 outside the second seat heater SH2 through a pair of lead wires 44a and 44b. The connector 46 is electrically connected to a power source (not shown) and the heater wire 40 is energized, whereby the second sheet heater SH2 can generate heat.

  Then, referring to FIG. 4, the heater wire 40 has a substantially U shape in a top view and is disposed on the base material 41 of the second sheet heater SH2, and both ends of the heater wire 40 are connected to the second sheet heater. It is connected to each lead wire 44a, 44b at the center of the lower end of SH2. Then, the heater wire 40 meanders at an appropriate pitch on the second sheet heater SH2, thereby forming a fourth heating part 41a, a fifth heating part 41b, and a sixth heating part 41c. The fourth heating unit 41a is a portion where the heater wire 40 meanders in small increments and the pitch between the lines is the narrowest. The fourth heating portion 41a is disposed facing the first area BA1 on the basis of the time when the second sheet heater is provided and heats it. To do. The fourth heating unit 41a can generate heat at the highest temperature by making the heater wire length per unit area the longest in the second sheet heater SH2. The second area BA2 is a portion where the heater wire 40 is meandering and the pitch between the lines is the widest. The second area BA2 faces the second area BA2 on the basis of the time when the second sheet heater is provided, and heats it. The fifth heating unit 41b can generate heat at the lowest temperature by making the heater wire length per unit area the shortest. And the 6th heating part 41c is a site | part which faces each 3rd area BA3 on the basis of the time of 2nd sheet heater arrangement | positioning, and heats it. In the sixth heating unit 41c, the pitch between the heater wires 40 is narrower than that of the fifth heating unit 41b, and the heater wire length per unit area is longer than that of the fifth heating unit 41b.

[Seat heater installation work]
1 to 4, the first seat heater SH1 is disposed between the seat pad 4P and the seat cover 4S while being arranged on the top plate main portion 4a. At this time, the first heating part 31a of the first sheet heater SH1 is disposed facing the first area CA1, the second heating part 31b is disposed facing the second area CA2, and the third heating part 31c is disposed in the third area CA3. Place them facing each other. In the present embodiment, the first area CA1 is disposed below the sacrum 50 so as to be able to face it. Similarly, the second seat heater SH2 is disposed between the seat pad 6P and the seat cover 6S while being disposed on the top plate main portion 6a. At this time, the fourth heating part 41a of the second sheet heater SH2 is disposed facing the first area BA1, the fifth heating part 41b is disposed facing the second area BA2, and the sixth heating part 41c is disposed in the third area BA3. Place them facing each other. In this embodiment, the first area BA1 is disposed behind the sacrum 50 so as to be able to face it. In this way, the heaters 30 and 40 are electrically connected to a power source (not shown) while the seat heaters SH1 and SH2 are arranged at predetermined positions so that heat can be generated by energization.

[Heating of pressed parts by each sheet heater]
Referring to FIGS. 1 and 2, the corresponding pressed parts 11 and 13 are heated by the first sheet heater SH1 and the second sheet heater SH2, respectively. It is desired that the portions 11 and 13 can be heated finely and comfortably. In this embodiment, referring to FIG. 2, the first pressed portion 11 is divided into a first area CA1, a second area CA2, and a third area CA3, and the first pressed portion 11 is finely heated. Make it possible. 2 and 3, the first sheet heater SH1 is provided with a plurality of heating portions 31a to 31c, and the temperatures of the areas CA1 to CA3 are adjusted while providing a temperature difference between these areas. Make it possible. Similarly, the third pressed portion 13 is divided into a first area BA1, a second area BA2, and a third area BA3. The second sheet heater SH2 is provided with a plurality of heating units 41a to 41c so that the temperatures of the areas BA1 to BA3 can be adjusted while providing a temperature difference between the areas.

  In addition, the first areas CA1 and BA1 can be set to the highest temperature, and the second areas CA2 and BA2 can be set to the lowest temperature. In this way, referring to FIG. 6, the sacrum 50 that can feel heat in the first area CA1, BA1 having the highest temperature can be heated. Furthermore, by arranging the second areas CA2 and BA2 having the lowest temperature around the first areas CA1 and BA1, it is possible to make the passenger feel the temperature of the first areas CA1 and BA1 higher.

  And it can avoid suitably that the 1st to-be-pressed part 11 is heated entirely by heating the all areas CA1-CA3 with 1st sheet | seat heater SH1, and an excessive temperature difference arises in the part. Similarly, by heating all the areas BA1 to BA3 by the second sheet heater SH2, it is possible to suitably avoid that the third pressed portion 13 is entirely heated and an excessive temperature difference is generated in the same portion. . The temperature setting of each area (temperature and temperature difference of each area) can be adjusted by the occupant himself, and a comfortable temperature can be appropriately set according to the occupant seated. For example, a high temperature mode in which the temperature of all areas is relatively high and a low temperature mode in which the temperature of all areas is relatively low can be provided, and these modes can be switched as appropriate. In addition, the passenger can be relaxed by continuously raising and lowering the temperature of each area.

  As described above, in this embodiment, the pressed parts 11 and 13 are divided into the first area CA1, BA1, the second area CA2, BA2, and the third area CA3, BA3, so that the pressed part is finely divided. A structure that can be heated. And it can avoid suitably that the 1st to-be-pressed part 11 and the 3rd to-be-pressed part 13 are heated entirely by each seat heater SH1 and SH2, and an excessive temperature difference arises in these each part. Then, by increasing the temperature difference between the first area CA1, BA1 and the second area CA2, BA2, it is possible to make the passenger feel the temperature of the first area CA1, BA1 higher. In the present embodiment, a single heater wire 30, 40 is used, and the wire length per unit area is changed to generate a temperature difference.

  In particular, in this embodiment, the sacrum 50 is suitably heated by setting the first areas CA1 and BA1 to the highest temperature. In this way, nerves around the sacrum 50 are stimulated, blood is warmed, etc., and the occupant's body part is warmed from the inside while ensuring the warmth of the occupant's sensitivity. Can do. By warming the occupant's body from the inside, it is possible to expect a cooling effect and a relaxing effect by heat transfer by blood. Further, by warming the sacrum 50 and surrounding muscles, it is possible to suitably suppress the stiffness and swelling of the occupant. Furthermore, in this embodiment, when considering the heat generation area of the seat, the pressed portions 11 and 13 are set as the heat generation area in consideration of the seating posture and pressure distribution of the passenger, so that efficient heat transfer to the passenger can be achieved. It becomes possible and power consumption and cost can be suppressed as much as possible. When aiming for the same performance as in the past, the overall efficiency is high in the configuration of the present embodiment, so that the configuration contributes to low cost and power saving. For this reason, according to the present embodiment, the pressed portions 11 and 13 which are seating surfaces of the seats can be heated finely and comfortably by the seat heaters SH1 and SH2.

  The vehicle seat of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments. In the present embodiment, an example in which the first areas CA1 and BA1 are formed at the facing position of the sacrum 50 has been described, but the configuration (shape, dimensions, formation position, number of formation, etc.) of these areas can be changed as appropriate. That is, the first area can be formed in plural or single at appropriate positions in the pressed part (top plate main part, top plate side part), and can be formed in a part where it is easy to feel the heat in the passenger body part. desirable. For example, the first area can be set as a part of the posterior midline of the occupant and provided at a position facing the occupant's shoulder, waist, legs, or buttock (seat position strongly pressed by the occupant) You can also. In addition, the passenger | crew body part which the 1st area of a seat cushion arranges facing, and the passenger | crew body part which the 1st area of a seat back faces arrange | position may be the same like a present Example, and can also differ. Further, the configurations of the second area and the third area can be appropriately changed according to the configuration of the first area. Also, other areas different from the first area to the third area can be set in the pressed part.

  Moreover, in this embodiment, although the structure (component member, shape, dimension, arrangement | positioning position, the number of arrangement | positioning etc.) of each seat heater SH1, SH2 was illustrated, it is not the meaning which limits the structure of the member. For example, a 1st heating part-a 3rd heating part can also be formed in each sheet | seat heater using a some heater wire. The heater wire can be attached to each seat heater so as to form a series circuit or a parallel circuit. And the structure (a shape, a dimension, a formation position, the number of formations, etc.) of a 1st heating part-a 3rd heating part can also be suitably changed according to the structure of a 1st area-a 3rd area.

  Further, in the present embodiment, the seat cushion 4 and the seat back 6 have been described as examples. However, the configuration of the present embodiment can be applied to various seat components such as a headrest, an armrest, and a footrest. Further, the seat heater can be provided on at least one member of the seat constituent member, and is preferably provided on a seat cushion which is not easily affected by the occupant's clothing. For example, when the seat heater is used by switching between the high temperature mode and the low temperature mode, the effect is most effective in the seat cushion which is not easily affected by the occupant's clothing in the low temperature mode. And the structure of this embodiment is applicable to vehicle seats, such as a vehicle, an aircraft, and a train.

2 Vehicle Seat 4 Seat Cushion 6 Seat Back 8 Headrest 4S, 6S Seat Cover 4P, 6P Seat Pad 11 First Pressed Part (Pressed Part of the Present Invention)
12r, 12l Second pressed part 13 Third pressed part (pressed part of the present invention)
14r, 14l 4th pressed part CA1, BA1 1st area CA2, BA2 2nd area CA3, BA3 3rd area SH1 1st sheet heater SH2 2nd sheet heater 31a-31c 1st sheet heater heating part 41a-41c 1st Two-seat heater heating section CM

Claims (1)

A seat pad that elastically supports an occupant, a seat cover that covers the seat pad, and a planar seat heater that generates heat when energized;
The seat heater in which the seating surface of the seat cover has a pressed portion that is pressed from the occupant with the occupant seated as a reference, and the pressed portion is interposed between the seat pad and the seat cover In vehicle seats that can be heated at
The pressed portion is arranged so as to be able to face the sacrum of the occupant, the second area arranged around the first area and adjacent thereto, the first area, and other than the second area Divided into third areas to be placed in the part,
The seat heater allows the temperature of the first area, the second area, and the third area to be adjusted while providing a temperature difference between the areas, and the temperature of the first area is set to be the highest. A vehicle seat in which the temperature of the second area is set to be the lowest.

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