Vehicle seats

Abstract

To provide a vehicle seat with a seat heater which does not provide discomfort to a seating person even when the seat heater is attached thereto.SOLUTION: A vehicle seat S includes a seat heater 40 between a cushioning material 2b and a surface cover material 2c, and a housing recessed part 24 for housing the seat heater 40 is formed at cushion side parts 21 located at left and right outer sides of the cushioning material 2b. Each housing recessed part 24 is disposed in a range, in which the cushion side part 21 contacts with the cushion frame 2a, in a seat width direction so as to be positioned at the inner side of an outer end portion of the range in the seat width direction.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat equipped with a seat heater.

Background Art

[0002] Conventionally, a vehicle seat that improves the comfort of a seated person by attaching a sheet-like seat heater to a seat body is known. As an example of such a vehicle seat, there is known one that includes a seat body configured by placing a cushion material on a frame serving as a skeleton and covering it with a skin material, and a seat heater is attached between the cushion material and the skin material (see, for example, Patent Document 1). <x

[0003] In the vehicle seat with a seat heater described in Patent Document 1, the seat heater is mainly composed of a seat base material, a heater wire attached on the seat base material and connected to an electric wire, and a thermostat for adjusting the temperature of the heater wire. The seat heater is attached to the seat back and the seat cushion, respectively. Further, the heater wire has a first heater wire and a second heater wire arranged in parallel with each other. For example, the first heater wire is arranged in the main body portion of the seat back, and the second heater wire is arranged in the bolster portions on both sides of the seat back.

[0004] With the above configuration, when the thermostat is operating, only the first heater wire can be energized, and when the thermostat is stopped, the first heater and the second heater wire can be energized. Also, even when the second heater wire in the left and right bolster portions is deformed due to an external impact or the like, the first heater wire in the main body portion of the seat back has a heater function, so the heater function of the entire seat back is not lost.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] International Publication No. 2007 / 097445 [Overview of the project] [Problems that the invention aims to solve]

[0006] By the way, in vehicle seats with seat heaters like the one in Patent Document 1, the seat heater is installed between the cushioning material and the upholstery material, which can cause unevenness on the seat back and seat cushion surface, potentially causing discomfort to the occupant. Generally, the central part of the seat back and seat cushion in the width direction of the seat has a cotton-like wadding material attached to the back of the surface material to improve the seating comfort for the occupant. However, the side bolster area often has a relatively thin wadding material attached, or sometimes no wadding material at all. Therefore, there was a risk that the installation of the seat heater in the side bolster area in particular might cause discomfort to the occupant.

[0007] Furthermore, in vehicle seats with seat heaters, such as those described in Patent Document 1, at least multiple electric wires, multiple heater wires, and a thermostat are attached to the seat base material. Therefore, if the electric wire portion or the connection portion between the electric wire and the heater wire is deformed due to an external impact, there is a risk that the heater function may not be adequately maintained. Furthermore, if the thermostat were to lose its function due to an external impact, there was a risk that the seat heater temperature could not be adjusted.

[0008] Book The purpose of the invention is, sa The objective is to provide a vehicle seat with a seat heater that does not cause discomfort to the occupant in the side bolster area. 。 [Means for solving the problem]

[0009] The aforementioned problem is solved by the vehicle seat of the present invention, which has a frame. cushion A vehicle seat comprising a frame on which cushioning material is placed and covered with a surface material, with a seat heater provided between the cushioning material and the surface material, The aforementioned The cushion material has a cushion body located in the center of the seat width direction, and cushion side portions located on the left and right outer sides of the cushion body, and a storage recess is formed in the cushion side portion for housing the seat heater, and the storage recess is such that the cushion material is located in the seat width direction cushion It is positioned within the range in contact with the frame, and is positioned inward from the outer edge portion of the said range in the sheet width direction. The seat heater has a side heater portion positioned on the cushion side, and the side heater portion is positioned so as to not overlap with the seat back in the vertical direction when viewed from above the seat, and is formed so that it widens from the rear portion of the side heater portion where the heater wires extend in close proximity to each other in the front-to-back direction without overlapping, toward the central portion of the side heater portion, and narrows from the central portion of the side heater portion toward the front portion of the side heater portion. This will be resolved. 。

[0010] In this case, the cushion frame has left and right side frame portions arranged laterally in the seat width direction, and the storage recess is preferably positioned to overlap with the portion of the side frame portion that protrudes the most toward the cushion material. Furthermore, the cushion side portion is formed to protrude toward the surface material as it extends outward in the seat width direction, and the storage recess is preferably positioned inward in the seat width direction from the portion of the cushion side portion that protrudes most toward the surface material. Furthermore, the sheet heater comprises a sheet-shaped sheet base material and a heater wire attached to the sheet base material, and it is preferable that the heater wire is provided so as not to protrude from the storage recess. Furthermore, the cushion frame has left and right side frame portions positioned laterally in the seat width direction, and the heater wires are preferably positioned inward from the outer end portions of the side frame portions in the seat width direction. 。 Ma Furthermore, the storage recesses are provided on the left and right sides of the cushion and are preferably formed to be symmetrical with respect to the cushion body. Also, it is preferable that the seat heater is adhesively attached on the surface of the storage recess. Also, it is provided with a side support device capable of moving the cushion side portion between a predetermined position and a protruding position protruding toward the skin material side from the predetermined position, and it is preferable that the storage recess is arranged at a position overlapping with the side support device. Also, it is preferable to further include a headrest that supports the occupant's head from behind.

Advantages of the Invention

[0020] Book According to the invention, Regarding the side bolster section, a vehicle seat with a seat heater that does not give a sense of discomfort to the seated person can be realized 。

Brief Description of the Drawings

[0023] [Figure 1] It is a perspective view of a vehicle seat with a seat heater according to the present embodiment. [Figure 2] It is a cross-sectional view taken along the line C-C of FIG. 1. [Figure 3] It is a plan view of the seat cushion, and is a view for explaining that a storage recess is formed in the cushion material. [Figure 4] It is a plan view of the seat heater. [Figure 5] FIG. 5(a) is a cross-sectional view taken along the line A-A of FIG. 1, FIG. 5(b) is a cross-sectional view taken along the line B-B of FIG. 1, and FIG. 5(c) is a cross-sectional view taken along the line C-C of FIG. 1. [Figure 6] It is a second embodiment of a vehicle seat, and is a view for explaining a side support device. <00千0094>It is a third embodiment of a vehicle seat, and is a plan view of the seat cushion. [Figure 8] It is a plan view of the seat heater in the third embodiment.

Modes for Carrying Out the Invention

[0024] Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to Figures 1 to 8. This embodiment relates to a vehicle seat equipped with a seat heater between a cushioning material and a surface material, wherein storage recesses for housing the seat heater are formed in the left and right outer cushion side portions of the cushioning material, and these storage recesses are positioned within the range in which the cushioning material abuts the frame in the seat width direction, and are positioned inside the outer edge portion of that range in the seat width direction. In vehicle seating, the side of the seat back that the occupant sits on is considered the front side of the seat.

[0025] As shown in Figure 1, the vehicle seat S of this embodiment mainly consists of a seat body comprising a seat back 1, a seat cushion 2, a headrest 3, and a seat connecting portion 4 to which the seat back 1 and the seat cushion 2 are connected, and a sheet-shaped seat heater 40 installed inside the seat body. The seat heater 40 is connected to the power supply and control device via a harness.

[0026] The seat back 1 is a backrest that supports the seated person's back from behind, and as shown in Figure 1, it is constructed by placing a cushioning material 1b on a back frame (not shown) which forms the skeleton, and covering it with a surface material 1c. The back frame consists of a rectangular frame that forms the skeleton, and is mainly composed of an upper frame and a lower frame that extend along the sheet width direction at predetermined intervals in the vertical direction, left and right side frames that extend downward from both ends of the upper frame in the sheet width direction and are connected to both ends of the lower frame, and a plurality of elastic springs that connect the left and right side frames.

[0027] The seat cushion 2 is a seating portion that supports the occupant from below, and as shown in Figures 1 and 2, it is constructed by placing a cushioning material 2b on a cushion frame 2a that forms the skeleton and covering it with a surface material 2c. The cushion frame 2a consists of a rectangular frame that forms the skeleton, and is mainly composed of side frame sections 2aa arranged on the left and right sides, plate-shaped pan frames that connect the front parts of each side frame section 2aa, rear connecting frames that connect the rear parts of each side frame section 2aa, and a plurality of elastic springs that are attached to the pan frames and the rear connecting frames.

[0028] The cushioning material 2b is a pad member made of foamed urethane or the like, and as shown in Figures 2 and 3, it mainly consists of a cushion body portion 20 located in the center of the seat width direction and left and right cushion side portions 21 and 22 located on the outside of the cushion body portion 20 in the seat width direction. The cushion side portions 21 and 22 are so-called side bolster portions, which are provided to protrude above the cushion body portion 20. More specifically, they are formed to protrude further upward (towards the surface material 2c) as they extend outward in the seat width direction, and are positioned to envelop the seated person from the left and right sides. A suspension groove 23 for suspending the surface material 2c is formed on the upper surface of the portion between the cushion body portion 20 and the cushion side portions 21 and 22. Furthermore, storage recesses 24 are formed on the upper surfaces of the cushion side portions 21 and 22 for housing the side heater portions 40b and 40c of the seat heater 40. Details will be described later.

[0029] The outer material 2c is made of an elastic nylon material or the like, and is formed in a shape that allows it to cover the cushioning material 2b from above. Specifically, the surface material 2c is divided at positions corresponding to the cushion body portion 20 and the cushion side portions 21 and 22, and the divided surface material 2c pieces are sewn together inside the suspension groove 23. On the back surface of the outer material 2c, a cotton-like wadding material 2ca is sewn and attached to the position corresponding to the cushion body portion 20, covering almost the entire surface.

[0030] The headrest 3 is a head support that supports the occupant's head from the rear, and as shown in Figure 1, it is constructed by placing a cushioning material 3b on a core material (not shown) and covering it with a surface material 3c, and is supported by a headrest pillar provided on a back frame (not shown).

[0031] The seat heater 40 is a planar heating element that warms the seat body, and as shown in Figure 1, it is installed inside the seat back 1 and seat cushion 2, and more specifically, as shown in Figure 2, it is installed between the cushion materials 1b, 2b and the surface materials 1c, 2c. As shown in Figure 4, the sheet heater 40 mainly consists of a sheet-shaped sheet substrate 41, electric wires 42 attached to the sheet substrate 41 and connected to a power source, heater wires 43 connected to the electric wires 42, a temperature measuring sensor 44 connected to the electric wires 42, and a temperature control device 45 connected to the electric wires 42.

[0032] As shown in Figure 4, the seat heater 40 mainly consists of a roughly rectangular central heater section 40a placed on the upper surface of the cushion body section 20, and roughly L-shaped side heater sections 40b and 40c placed on the upper surfaces of the left and right cushion side sections 21 and 22. At the rear end of the central heater section 40a, the electric wires 42, heater wires 43, temperature measuring sensor 44, and temperature control device 45 are densely arranged.

[0033] The sheet base material 41 is made of a stretchable fabric and is the base portion of the sheet heater 40. In the central portion of the sheet substrate 41 in the sheet width direction, V-shaped notches 41d are formed at the front and rear ends as positioning portions. When the seat heater 40 is correctly placed on the cushioning material 2b, the V-shaped marks on each notch 41d are aligned with the T-shaped marks (not shown) provided on the cushioning material 2b.

[0034] The electric wire 42 supplies electricity from the power source to the heater wire 43, temperature measuring sensor 44, and temperature control device 45, and a harness 42a is formed by bundling multiple electric wires 42 at one end. The harness 42a has one end attached to the sheet substrate 41, and the other end extends outwards from the sheet substrate 41 and is connected to the power supply and control device.

[0035] The heater wire 43 is adhesively fixed onto the sheet base material 41, and extends in a meandering manner from the rear end portion of the cushioning material 2b toward the front side of the sheet, bends and folds back at the front end portion of the cushioning material 2b, and extends back to the rear end portion again. The heater wire 43 comprises a first heater wire 43a, a second heater wire 43b, and a third heater wire 43c, each connected to the electric wire 42 and arranged in parallel with each other. The first heater wire 43a is positioned in the central heater section 40a, while the second heater wire 43b and the third heater wire 43c protrude outward in the seat width direction from the rear end portion of the central heater section 40a and are positioned in the left side heater section 40b and the right side heater section 40c, respectively. The heater wire 43 is fixed to the sheet substrate 41 with adhesive, but it may also be fixed in a way that it is folded into the interior of the sheet substrate 41.

[0036] The temperature measurement sensor 44 is a thermistor that measures the temperature of the heater wire 43 and outputs an output signal based on the heater temperature measurement result to the control device. The temperature control device 45 is a thermal thermostat that adjusts the temperature of the heater wire 43, and maintains the heater temperature below a certain level by cutting off the power supply to the heater wire 43 when the heater temperature exceeds a predetermined value. The control device, which is not shown in the diagram, corresponds to an ECU (Electronic Control Unit) and receives the output signal detected by the temperature measurement sensor 44 and controls the power supply from the power source to each heater wire 43 by comparing the heater temperature with a set value.

[0037] In the above configuration, as shown in Figure 4, the seat heater 40 is composed of a central heater section 40a and left and right side heater sections 40b and 40c. Therefore, the seat cushion 2 is divided into a central section and left and right side bolster sections in the width direction of the seat, and each section can be heated independently, resulting in a seat with a seat heater.

[0038] In the above configuration, the seat heater 40 includes a first heater wire 43a, a second heater wire 43b, and a third heater wire 43c arranged in parallel with each other. Therefore, even if, for example, the second heater wire 43b or the third heater wire 43c is deformed due to an external impact, the first heater wire 43a still has a heating function, so the heating function of the entire seat heater is not lost.

[0039] <Storage recess for housing the seat heater> Next, we will describe in detail the storage recesses 24 formed in the cushion side portions 11 and 12 of the cushioning material 2b. As shown in Figures 2 and 3, the storage recess 24 is a stepped portion for storing the left and right side heater portions 40b and 40c of the seat heater 40, and consists of a recess with a roughly U-shaped cross-section, extending along the extension direction of the cushion side portions 21 and 22, in other words, along the front-to-back direction of the seat. More specifically, the left and right storage recesses 24 are roughly L-shaped in plan view, extending outward from the rear end of the cushion body 20 in the seat width direction, and extending in the seat front-rear direction along the left and right cushion side portions 11 and 12, respectively. Furthermore, the left and right storage recesses 24 are formed symmetrically with respect to the cushion body 20.

[0040] As shown in Figure 2, the storage recess 24 is formed to a depth such that, when the seat heater 40 is stored inside, the heater wire 43 does not protrude outward from the opening of the storage recess 24. Furthermore, the storage recess 24 is formed to become deeper in the seat width direction from the left and right side walls 24a towards the central part, in other words, its bottom wall 24b is formed to have a roughly V-shape in its vertical cross-section. In this case, it is preferable that the heater wire 43 is positioned towards the center of the storage recess 24 in the seat width direction.

[0041] As shown in Figure 2, the storage recess 24 is positioned within the range in the seat width direction where the cushioning material 2b (cushion side portion 21) is in contact with the cushion frame 2a (side frame portion 2aa). More specifically, it is positioned inward from the outer edge portion of that range in the seat width direction. In this case, it is preferable that the heater wire 43 is positioned inward from the outer edge portion of the side frame portion 2aa in the seat width direction. Furthermore, the storage recess 24 is positioned in a location that overlaps with the protruding portion 2ab of the side frame portion 2aa that protrudes the most towards the cushion side portion 21 (upward side) in the vertical direction.

[0042] As shown in Figure 2, the storage recess 24 is positioned inward in the seat width direction from the part of the cushion side 11 that protrudes the most towards the surface material 2c side (upward side). Furthermore, the storage recess 24 is positioned above the upper surface of the cushion body 10 in the vertical direction.

[0043] In the above configuration, as shown in Figure 3, the storage recess 24 extends continuously along the extension direction (front-to-back direction of the seat) of the cushion side portion 21. More specifically, as shown in Figures 5(a) and 5(b), the storage recess 24 is formed to become wider in the extending direction from the rear end portion of the cushion side portion 21 towards the approximate central portion. Generally, the central part of the cushion side portion 21 of the seat cushion 2 is the part where the seated person's buttocks are supported and where the seating load is applied. Therefore, the central portion of the sheet is the part that is to be preferably heated by the sheet heater 40, and the part where deformation of the sheet heater 40 is to be suppressed. Therefore, by using the shape and arrangement of the storage recess 24 described above, a suitable shape and arrangement for the seat heater 40 can be achieved, and deformation of the seat heater 40 can be suppressed.

[0044] Furthermore, in the above configuration, as shown in Figures 5(b) and 5(c), the storage recess 24 is formed such that it gradually narrows in width from approximately the central portion to the front portion of the cushion side portion 21 in the extending direction. Generally, the front portion of the cushion side section 21 is the part that the occupant straddles and is subjected to repeated seating loads. Therefore, the front part of the seat is the area that should be moderately warmed by the seat heater 40, and the area where deformation of the seat heater 40 should be suppressed. On the other hand, since this is not an area that the occupant is constantly in contact with, the area of ​​the seat heater 40 can be made somewhat smaller. Therefore, by using the shape and arrangement of the storage recess 24 described above, a suitable shape and arrangement for the seat heater 40 can be achieved, and deformation of the seat heater 40 can be suppressed.

[0045] <Second embodiment of a vehicle seat> Next, a second embodiment of the vehicle seat will be described based on Figure 6. Note that any information that overlaps with the vehicle seat S described above will be omitted. The vehicle seat S2 of the second embodiment differs in that it is equipped with a side support device 70 in the side bolster portion of the seat cushion 2, which allows the cushion side portion 121 to be moved between a normal position and a protruding position shown in Figure 6, which protrudes further toward the surface material 102c side (upward side) than the normal position.

[0046] The side support device 70 consists of an air cell-driven unit and is installed vertically between the side frame portion 102aa and the cushion side portion 121. More specifically, the side support device 70 is positioned so as to overlap with the storage recess 124 in the vertical direction. The side support device 70 mainly consists of a fixed plate 71 fixed to the side frame portion 102aa, a movable plate 73 that is rotatably attached to the fixed plate 71 around a pivot axis 72, and an air cell 74 that connects the fixed plate 71 and the movable plate 73 and can push the movable plate 73 towards the cushion side portion 121 by inflating itself.

[0047] In the above configuration, as shown in Figure 6, when the cushion side portion 121 moves to the protruding position, the storage recess 124 is positioned to overlap with the portion of the cushion side portion 121 that protrudes the most towards the surface material 102c side (upward diagonally inward). Furthermore, the storage recess 124 is formed to be deepest at the position where it overlaps with the most protruding part. Generally, the portion of the side bolster supported by the side support device 70 is the part that is most likely to come into contact with the seated person. Therefore, this easily contactable area is the part that we want to heat suitably with the sheet heater 140, and the part where we want to suppress deformation of the sheet heater 140. Therefore, by forming a storage recess 124 in this easily contacted area, deformation of the seat heater 140 can be suppressed while ensuring the comfort of the occupant with the seat heater 140.

[0048] Furthermore, in the above configuration, when the cushion side portion 121 moves to a protruding position, the surface material 102c will be pushed toward the occupant, which may cause unevenness to occur on the seating surface due to the installation of the seat heater 140. In other words, it may easily cause discomfort to the occupant. Therefore, the effect of forming the storage recess 124 becomes even more pronounced in a seat equipped with the side support device 70.

[0049] <Third embodiment of a vehicle seat> Next, a third embodiment of the vehicle seat will be described with reference to Figures 7 and 8. The vehicle seat S3 of the third embodiment differs in that the cushion side portion 221 is equipped with a first side heater portion 240ba and a second side heater portion 240bb that are spaced apart from each other. The first side heater section 240ba and the second side heater section 240bb each extend along the extension direction (front-rear direction of the seat) of the cushion side section 221, and the second side heater section 240bb is configured independently of the first side heater section 240ba.

[0050] The cushion side portion 221 is formed with a first storage recess 224a and a second storage recess 224b for housing the first side heater portion 240ba and the second side heater portion 240b, respectively, and a connecting recess 224c for connecting the first storage recess 224a and the second storage recess 224b. Therefore, while high-end vehicle seats generally have multiple seat heaters 240 mounted on the side bolster, the configuration of the storage recess 224 allows for a good seating experience even with multiple seat heaters 240 installed, while also suppressing deformation of the seat heaters 240. Furthermore, the formation of the connecting recess 224c as described above makes it easier to position the seat heater 240.

[0051] <Other Embodiments> In the above embodiment, as shown in Figure 1, the vehicle seat S is a seat having side bolster portions (cushion side portions 21, 22), and the seat heater 40 is attached to the cushion body portion 20 and the cushion side portions 21, 22. However, it is not particularly limited, and for example, it may be a seat without side bolster portions. In that case, the seat heater 40 only needs to be attached to the cushion body 20, and the cushion body 20 can be divided into three regions in the seat width direction, with each heater wire 43 extended and placed in each region.

[0052] In the above embodiment, as shown in Figure 5(a), the rear portion of the cushion side portion 21 of the seat does not protrude outward beyond the side frame portion 2aa in the seat width direction, and is supported by the side frame portion 2aa. Therefore, since the deformation of the cushioning material is relatively small in the rear portion of the cushion side section 21 of the seat, it is not necessarily required that a storage recess 24 be formed therein.

[0053] In the above embodiment, the seat heater 40 is attached to the surface of the storage recess 24 by adhesive tape, but it is not limited to being attached by sewing, or it may be simply placed and stored as is.

[0054] In the above embodiment, a vehicle seat used in an automobile was described as a specific example, but it is not particularly limited and can be used not only as a vehicle seat used in trains, buses, etc., but also as a seat for vehicles used in airplanes, ships, etc. In addition to vehicle seats, these seats can also be widely used indoors or outdoors in commercial facilities such as movie theaters and planetariums, as well as in public facilities such as hospital waiting rooms.

[0055] In this embodiment, the vehicle seat according to the present invention was described primarily. However, the embodiments described above are merely examples to facilitate understanding of the present invention and do not limit it. The present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included. [Explanation of Symbols]

[0056] S, S2, S3 Vehicle Seats 1 seat back 1b, 2b, 3b Cushioning material 1c, 2c, 3c, 102c skin material 2ca wadding material 2 seat cushions 2a Cushion frame (frame) 2aa, 102aa Side frame section 2ab protruding part 3 Headrests 4. Seat connecting section (connecting section) 20 Cushion main body 21, 22, 121, 221 Cushion side section 23. Suspension groove 24,124,224 Storage recess 24a Side wall part 24b Bottom wall 224a First storage recess 224b Second storage recess 224c Connecting recess 40,140,240 Seat heater 40a Central heater section 40b, 40c Side heater section 240ba First side heater section 240bb Second side heater section 41 Sheet base material 41d Notch 42,142 Electric wire 42a Harness 43 Heater wire 43a First heater line 43b Second heater line 43c Third heater wire 44 Temperature measurement sensor 45,145 Temperature control device 70 Side support device 71 Fixing plate 72 Rotating axis 73 Movable Plate 74 Air Cells

Claims

1. A vehicle seat comprising a cushion frame that serves as the skeletal structure, on which cushioning material is placed and covered with a surface material, and a seat heater provided between the cushioning material and the surface material, The cushion material comprises a cushion body located in the center in the width direction of the seat, and cushion side portions located on the left and right outer sides of the cushion body. A storage recess for housing the seat heater is formed in the side portion of the cushion. The storage recess is positioned within the range in which the cushioning material is in contact with the cushion frame in the seat width direction, and is positioned inside the outer edge portion of the range in the seat width direction. The seat heater has a side heater portion that is positioned on the side of the cushion, The aforementioned side heater section is, It is positioned so as not to overlap with the seatback in the vertical direction when viewed from above the seat. The rear portion of the side heater section is formed such that it widens from the part where the heater wires extend in close proximity to each other without overlapping, towards the central portion of the side heater section. A vehicle seat characterized in that it is formed such that the width of the side heater portion narrows from the central portion toward the front portion of the side heater portion.

2. The cushion frame has left and right side frame portions arranged laterally in the seat width direction, The vehicle seat according to claim 1, characterized in that the storage recess is positioned to overlap with the portion of the side frame that protrudes most towards the cushioning material side.

3. The cushion side portion is formed to protrude toward the surface material side as it extends outward in the width direction of the seat. The vehicle seat according to claim 1, characterized in that the storage recess is positioned inward in the seat width direction from the portion of the cushion side that protrudes most towards the surface material side.

4. The aforementioned seat heater is The device comprises a sheet-like sheet substrate and the heater wire attached to the sheet substrate, The vehicle seat according to any one of claims 1 to 3, characterized in that the heater wire is provided so as not to protrude from the storage recess.

5. The cushion frame has left and right side frame portions arranged laterally in the seat width direction, The vehicle seat according to claim 4, characterized in that the heater wire is positioned inward from the outer end portion of the side frame in the seat width direction.

6. The vehicle seat according to any one of claims 1 to 5, characterized in that the storage recess is provided on the left and right cushion side portions and is formed to be symmetrical with respect to the cushion body portion.

7. The vehicle seat according to any one of claims 1 to 6, characterized in that the seat heater is attached by adhesive bonding to the surface of the storage recess.

8. The cushion side portion is provided with a side support device that can move between a predetermined position and a protruding position that protrudes further toward the surface material than the predetermined position. The vehicle seat according to any one of claims 1 to 7, characterized in that the storage recess is positioned to overlap with the side support device.

9. A vehicle seat according to any one of claims 1 to 8, further comprising a headrest that supports the occupant's head from the rear.

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