seat

Abstract

To provide a seat capable of heightening comfortable feeling of a seated person.SOLUTION: A seat (sofa S) includes a seat body S0 having a seat part S1 where a person is seated and a backrest S2, side parts (armrests SA) positioned on the right and left of the seat part S1, and projecting above the seat part S1, and a sheet-like heater 50. The heater 50 includes a seat part heater 51 for heating a face facing a seated person on the seat part S1, a backrest heater 52 for heating a face facing a seated person on the backrest S2, and a side part heater 53 for heating a face facing a seated person on the side parts.SELECTED DRAWING: Figure 1

Description

Technical Field

[0006] ,

[0007] ,

[0001] The present invention relates to a seat having a seat portion on which a person sits and a backrest.

Background Art

[0002] As seats having a seat portion and a backrest, a household sofa, an armchair, a vehicle seat, etc. are known (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, it is desirable that the seat can enhance the comfort of a person sitting on the seat (the seated person).

[0005] Therefore, an object of the present invention is to provide a seat that can enhance the comfort of the seated person ru shi - and to provide a seat that can prevent the seated person from feeling discomfort. Another object is to prevent the seated person from feeling discomfort. <�

Means for Solving the Problems

[0006] The seat for achieving the above object includes a seat body having a seat portion on which a person sits and a backrest, a side portion located at least on one of the left and right sides of the seat portion and protruding above the seat portion, and a heater including at least one of a seat heater that is a sheet-like heater and heats the surface of the seat portion facing the seated person, a backrest heater that heats the surface of the backrest facing the seated person, and a side portion heater that heats the surface of the side portion facing the seated person.

[0007] With this configuration, the seat heater can warm the side of the seat facing the occupant, the backrest heater can warm the side of the backrest facing the occupant, and the side heaters can warm the side of the seat facing the occupant. This enhances the occupant's comfort.

[0008] In the aforementioned seat, the side portion is an armrest, and the side portion heater may be configured to include an armrest heater that heats the upper surface of the armrest.

[0009] According to this, the armrest heater can warm the top surface of the armrest. This can enhance the comfort of the person sitting in the seat.

[0010] In the aforementioned sheet, the side heater may be configured to include an inner surface heater that heats the left and right inner surfaces of the side.

[0011] According to this design, the inner side heaters can warm the left and right inner surfaces of the side of the seat, thus warming the occupant from the side. This enhances the occupant's comfort.

[0012] In the aforementioned sheet, the side portion can be configured to be detachable from the sheet body.

[0013] In the aforementioned seat, the seat portion comprises a seat cushion and a lower support portion that supports the seat cushion from below, and the seat cushion can be configured to be detachable from the lower support portion.

[0014] In the aforementioned seat, the backrest includes a backrest cushion and a rear support portion that supports the backrest cushion from behind, and the backrest cushion can be configured to be detachable from the rear support portion.

[0015] The aforementioned seat may further include a headrest, and the heater may be configured to include a headrest heater that heats the surface of the headrest facing the occupant.

[0016] According to this, the headrest heater can warm the surface of the headrest that faces the occupant. This can enhance the occupant's comfort.

[0017] The aforementioned seat is equipped with wires for supplying power to the heater, and the seat portion has a seat cushion and a lower support portion that supports the seat cushion from below, and the wires can be configured to be pulled out from the seat body to the rear at a position below the lower end of the seat cushion.

[0018] In the aforementioned seat, at least one of the seat heater and the backrest heater has a heater wire and a sheet-like base material that supports the heater wire, and the base material may be configured to have a plurality of notches.

[0019] According to this design, the heater deforms appropriately when a person sits on the seat or leans back, so as not to cause discomfort to the occupant.

[0020] In the aforementioned sheet, each of the cuts may extend in the front-to-back or up-and-down direction, and the multiple cuts may be arranged side by side. [Effects of the Invention]

[0021] According to the present invention, the comfort of the seated person can be enhanced.

[0022] Furthermore, if the side section has an armrest, including an armrest heater in the side heater can enhance the comfort of the seated person.

[0023] Furthermore, by including an inner side heater in the side heater, the comfort of the seated person can be enhanced.

[0024] Also, when the seat includes a headrest, the heater including a headrest heater can enhance the comfort of the seated person.

[0025] Also, by having a plurality of cuts in the base materials of the seat heater and the backrest heater, it is possible to prevent giving a sense of discomfort to the seated person.

Brief Description of the Drawings

[0026] [Figure 1] It is a perspective view showing a sofa as an example of the seat according to the embodiment. [Figure 2] It is an exploded perspective view of the sofa. [Figure 3] It is a cross-sectional view of the sofa. [Figure 4] It is a front view (a) of the seat heater and a front view (b) of the backrest heater. [Figure 5] It is a view of the sofa seen from the front showing a cross-section of the armrest. [Figure 6] It is a view showing an operation part. [Figure 7] It is a view for explaining the connection between the heater and the operation part. [Figure 8] It is a perspective view of the sofa seen from the back. [Figure 9] It is a perspective view showing a sofa of a modified example.

Mode for Carrying Out the Invention

[0027] Next, the embodiment will be described. In this specification, front and back, left and right, and up and down are based on the front and back, left and right, and up and down as seen from the seated person. As shown in FIG. 1, the seat according to the embodiment is configured as a two-seater sofa S for home use. The sofa S includes a seat body S0, an armrest SA as an example of a side part, and a headrest SH. The seat body S0 has a seat part S1 on which a person sits and a backrest S2.

[0028] <00001As shown in Figure 2, the seat S1 is composed of two seat cushions 100 and a lower support portion 310 that supports the seat cushions 100 from below. The two seat cushions 100 are arranged side by side. The seat cushions 100 are used by being placed on the lower support portion 310 and are detachable from the lower support portion 310.

[0029] The backrest S2 is composed of two backrest cushions 200 and a rear support section 320 that supports the backrest cushions 200 from behind. The two backrest cushions 200 are arranged side by side. The backrest cushions 200 are used by being placed in front of the rear support section 320 and are detachable from the rear support section 320.

[0030] The armrests SA are located to the left and right of the seat S1, respectively, and protrude above the seat S1. Specifically, the left armrest SA is located to the left of the left seat cushion 100, and the right armrest SA is located to the right of the right seat cushion 100. Furthermore, each armrest SA protrudes above the upper surface of the seat cushion 100 when it is placed on the lower support 310 (see Figure 1).

[0031] The armrest SA is detachable from the seat S1 and backrest S2 (seat body S0). More specifically, the armrest SA is detachable from the lower support 310 and the rear support 320. After being attached to the seat body S0, the armrest SA is secured to at least one of the lower support 310 and the rear support 320 by screws (not shown).

[0032] The headrest SH is the part that supports the portion of the seated person's body from the neck upwards. The headrest SH supports at least one of the seated person's neck and head. Two headrests SH are provided side by side, corresponding to the left backrest cushion 200 and the right backrest cushion 200, respectively. The headrest SH is detachable from the backrest S2. More specifically, the headrest SH is detachable from the rear support part 320.

[0033] In this embodiment, the left and right armrests SA, the left and right headrests SH, the lower support portion 310, and the rear support portion 320 constitute the base portion SB. In other words, the base portion SB has the left and right armrests SA, the headrests SH, the lower support portion 310, and the rear support portion 320. Furthermore, the sofa S is composed of two seat cushions 100, two back cushions 200, and the base portion SB.

[0034] Returning to Figure 1, the sofa S further includes a heater 50 and an operating unit 60. The heater 50 is a sheet-shaped heater, a so-called surface heater. In this embodiment, the heater 50 includes a seat heater 51, a backrest heater 52, a side heater 53, and a headrest heater 54.

[0035] The seat heater 51 is a heater that heats the surface of the seat S1 facing the occupant, specifically the upper surface of the seat S1. The seat heater 51 is mainly positioned facing the occupant's buttocks and thighs, and heats the occupant's buttocks and thighs from below. The seat heater 51 is provided on each of the left and right seat cushions 100. As shown in Figure 3, the seat cushion 100 comprises a first cushioning material 110 and a first covering material 120 that covers the first cushioning material 110. The seat heater 51 is positioned between the upper surface of the first cushioning material 110 and the first covering material 120.

[0036] As shown in Figure 4(a), the seat heater 51 is composed of a heater wire 511 that generates heat when electricity is passed through it, and a sheet-like base material 512 that supports the heater wire 511. The base material 512 is made of nonwoven fabric or the like and has a plurality of notches 513. Each of the notches 513 extends in the front and back directions. More specifically, each of the notches 513 extends from the front end of the base material 512 toward the rear. The plurality of notches 513 are arranged side by side. The heater wire 511 is positioned along the contour of the base material 512 including the notches 513 and is fixed to the upper surface of the base material 512 with adhesive or the like.

[0037] Returning to Figure 3, the backrest heater 52 is a heater that heats the surface of the backrest S2 facing the seated person, specifically the front surface of the backrest S2. The backrest heater 52 is mainly positioned facing the seated person's lower back and back, and heats the seated person's lower back and back from behind. The backrest heater 52 is provided on each of the left and right backrest cushions 200 (see Figure 1). The backrest cushion 200 comprises a second cushioning material 210 and a second surface covering 220 that covers the second cushioning material 210. The backrest heater 52 is positioned between the front surface of the second cushioning material 210 and the second surface covering 220.

[0038] As shown in Figure 4(b), the backrest heater 52 is composed of a heater wire 521 that generates heat when electricity is passed through it, and a sheet-like base material 522 that supports the heater wire 521. The base material 522 is made of nonwoven fabric or the like and has a plurality of notches 523. Each of the notches 523 extends vertically. More specifically, each of the notches 523 extends downward from the upper end of the base material 522. The plurality of notches 523 are arranged side by side. The heater wire 521 is positioned along the contour of the base material 522, including the notches 523, and is fixed to the front surface of the base material 522 with adhesive or the like.

[0039] As shown in Figure 5, the side heater 53 is a heater that heats the surface of the armrest SA facing the seated person. More specifically, the side heater 53 includes an armrest heater 53A that heats the upper surface of the armrest SA and inner surface heaters 53B that heat the left and right inner surfaces of the armrest SA.

[0040] The armrest heater 53A and the inner surface heater 53B are provided on each of the left and right armrests SA. The armrest SA comprises a first pad material 410 and a third surface material 420 covering the first pad material 410. The armrest heater 53A is positioned between the upper surface of the first pad material 410 and the third surface material 420. The inner surface heater 53B is positioned between the left and right inner surfaces of the first pad material 410 and the third surface material 420. More specifically, the inner surface heater 53B is positioned between the left and right inner surfaces of the first pad material 410, specifically the portion located near the top of the seat cushion 100 and above, and the third surface material 420. The inner surface heater 53B is positioned opposite the sitter's lumbar region. The inner surface heater 53B is positioned opposite the sitter's ilium.

[0041] As shown in Figure 3, the headrest heater 54 is a heater that heats the surface of the headrest SH facing the occupant, specifically the front surface of the headrest SH. The headrest heater 54 is positioned facing at least one of the occupant's head and neck, and heats at least one of the occupant's head and neck from behind. The headrest heater 54 is provided on each of the left and right headrests SH (see Figure 1). The headrest SH comprises a second pad material 610 and a fourth surface material 620 that covers the second pad material 610. The headrest heater 54 is positioned between the front surface of the second pad material 610 and the fourth surface material 620.

[0042] As shown in Figure 1, the control unit 60 is the part used by the seated person to operate the heater 50. The control unit 60 is located on the armrest SA of the base unit SB. More specifically, the control unit 60 is located near the front end of the upper surface of the left armrest SA. In this embodiment, the right armrest heater 53A is located so as to heat almost the entire upper surface of the right armrest SA, while the left armrest heater 53A is located only behind the control unit 60 to avoid it.

[0043] As shown in Figure 6, the operating unit 60 includes, for example, a power switch 61, a plurality of selector switches 62, and an adjustment dial 63. The heater 50 can be heated on the side facing the seated person by turning on the power switch 61.

[0044] The changeover switch 62 is a switch used to switch whether or not heating is performed by the heater 50 when the power switch 61 is turned ON. Ten changeover switches 62 are provided, corresponding to the left and right seat heaters 51, left and right backrest heaters 52, left and right armrest heaters 53A, left and right inner side heaters 53B, and left and right headrest heaters 54.

[0045] For example, turning on the changeover switch 62 corresponding to the left seat heater 51 allows the left seat heater 51 to warm the top surface of the left seat cushion 100, and turning the changeover switch 62 off stops the heating by the left seat heater 51. Similarly, turning on the changeover switch 62 corresponding to the right seat heater 51 allows the right seat heater 51 to warm the top surface of the right seat cushion 100, and turning the changeover switch 62 off stops the heating by the right seat heater 51. The same applies to heaters 52, 53A, 53B, and 54.

[0046] The adjustment dial 63 is used to adjust the output of the heater 50. In sofa S, the output of the heater 50 can be increased by turning the adjustment dial 63 clockwise as shown in the diagram, and the output of the heater 50 can be decreased by turning the adjustment dial 63 counterclockwise as shown in the diagram. It is desirable that the output of the heater 50 be adjustable for each heater 51, 52, 53A, 53B, 54, and for the left and right sides separately.

[0047] As shown in Figure 7, the sofa S further includes wires 70 for supplying power to the heater 50. The wires 70 are connected to the heater 50 via an operating unit 60. Here, the support section 300 is the part that includes the lower support section 310 and the rear support section 320, and is the part of the seat body S0 that supports the seat cushion 100 and the back cushion 200. The wires 70 include wires 700 to 710.

[0048] Wire 701 connects the left seat heater 51 to the control unit 60, and wire 702 connects the right seat heater 51 to the control unit 60. Since the seat cushion 100 is detachable from the support unit 300 (lower support unit 310), the connection of wire 701 at the point where the left seat cushion 100 and the support unit 300 are separated is made by connector 81 (see also Figure 2 as appropriate). Similarly, the connection of wire 702 at the point where the right seat cushion 100 and the support unit 300 are separated is made by connector 82. Furthermore, since the armrest SA is detachable from the support unit 300 (seat body S0), the connection of wires 701 and 702 at the point where the support unit 300 and the left armrest SA are separated is made by connector 86.

[0049] Wire 703 connects the left backrest heater 52 to the control unit 60, and wire 704 connects the right backrest heater 52 to the control unit 60. Since the backrest cushion 200 is detachable from the support unit 300 (rear support unit 320), the connection of wire 703 at the point where the left backrest cushion 200 and the support unit 300 are separated is made by connector 83. Similarly, the connection of wire 704 at the point where the right backrest cushion 200 and the support unit 300 are separated is made by connector 84. Furthermore, the connection of wires 703 and 704 at the point where the support unit 300 and the left armrest SA are separated is made by connector 86.

[0050] Wire 705 connects the left armrest heater 53A to the control unit 60, and wire 706 connects the left inner side heater 53B to the control unit 60.

[0051] Wire 707 connects the right armrest heater 53A to the control unit 60, and wire 708 connects the right inner surface heater 53B to the control unit 60. At the point where the right armrest SA and the support unit 300 are separated, wires 707 and 708 are connected by connector 85. Also, at the point where the support unit 300 and the left armrest SA are separated, wires 707 and 708 are connected by connector 86.

[0052] Wire 709 connects the left headrest heater 54 to the control unit 60, and wire 710 connects the right headrest heater 54 to the control unit 60. Since the headrest SH is detachable from the support unit 300 (rear support unit 320), the connection of wire 709 at the point where the left headrest SH and the support unit 300 are separated is made by a connector (not shown). Similarly, the connection of wire 710 at the point where the right headrest SH and the support unit 300 are separated is made by a connector (not shown). Furthermore, the connection of wires 709 and 710 at the point where the support unit 300 and the left armrest SA are separated is made by connector 86.

[0053] The electric wire 700 connects the power plug (indicated by the omitted symbol) and the control unit 60. The electric wire 700 is routed out from the support unit 300. The connection of the electric wire 700 at the point where the left armrest SA and the support unit 300 are separated is made by a connector 86. As shown in Figure 8, the electric wire 700 is routed out from the rear surface of the left-right center of the support unit 300 (seat body S0) toward the rear. To further explain, as shown in Figure 3, the electric wire 700 is routed out from the rear surface of the seat body S0 toward the rear at a position below the lower end of the seat cushion 100 when it is attached to the lower support unit 310 (see dashed line).

[0054] According to the embodiment described above, the seat heater 51 can warm the upper surface of the seat S1 facing the occupant, and the backrest heater 52 can warm the front surface of the backrest S2 facing the occupant.

[0055] Furthermore, the side heater 53 can warm the side of the armrest SA that faces the person sitting on it. Specifically, the armrest heater 53A can warm the top surface of the armrest SA. In addition, the inner side heater 53B can warm the left and right inner surfaces of the armrest SA, thus warming the person sitting on it from the side.

[0056] Additionally, the headrest heater 54 can warm the front of the headrest SH that faces the occupant.

[0057] In this way, the heater 50 can warm the surface opposite the seated person, thereby enhancing the seated person's comfort.

[0058] Furthermore, because the base materials 512 and 522 of the seat heater 51 and backrest heater 52 have multiple notches 513 and 523, the seat heater 51 and backrest heater 52 deform appropriately when a person sits on the seat S1 or leans against the backrest S2, so as not to cause discomfort to the occupant.

[0059] Although embodiments have been described above, the present invention is not limited to the embodiments described above and can be implemented with appropriate modifications as illustrated below.

[0060] For example, as shown in Figure 9, the heater 50 may include a leg heater 55. The leg heater 55 is a heater that heats the surface of the sofa S that faces the legs of the person sitting on it. The leg heater 55 mainly heats the part of the person's legs from the knees down. In the modified example shown in Figure 9, the leg heater 55 is provided to heat the front surface of the seat S1. More specifically, the leg heater 55 is provided to heat the front surface of the seat cushion 100. The leg heater may also be provided to heat not only the front surface of the seat S1, but also the surface of the lower support 310 that faces the person sitting on it, specifically the front surface of the lower support 310. Furthermore, the leg heater may be provided to heat the surface of the retractable ottoman of the sofa S that faces the person sitting on it.

[0061] Furthermore, as shown in Figure 9, the heater 50 may also include an outer surface heater 56. The outer surface heater 56 is a heater that heats the left and right outer surfaces of the sofa S. In the modified example shown in Figure 9, the outer surface heater 56 is provided to heat the left and right outer surfaces of the armrest SA. By providing such an outer surface heater 56, for example, it is possible to warm people or pets on either side of the sofa S, or to raise the room temperature using the sofa S.

[0062] Furthermore, although the armrest SA (side portion) was detachable from the seat body S0 in the above embodiment, the invention is not limited to this, and for example, it may be configured to be non-detachable.

[0063] Furthermore, in the above embodiment, the electric wire 70 (700) for supplying power to the heater 50 was routed rearward from the rear surface of the seat body S0, but this is not limited to this. For example, the electric wire may be routed from the armrest SA. Specifically, the electric wire may be routed rearward from the rear surface of the armrest SA, or it may be routed outward from the left and right outer surfaces of the armrest SA. Also, if the sofa S does not have an armrest (side part) on at least one of the left and right sides of the seat part S1, the electric wire may be routed left or right from the left or right side of the seat body S0, for example, the left or right side of the lower support part 310.

[0064] Furthermore, in the above embodiment, the armrest SA (side portion) was located only on one of the left or right sides of the seat cushion 100, but this is not limited to this. For example, the armrest (side portion) may be located on both the left and right sides of the seat cushion 100.

[0065] Furthermore, although the armrest SA (side portion) was located on both the left and right sides of the seat S1 in the above embodiment, the invention is not limited to this. For example, the armrest (side portion) may be located on only one side of the seat, either the left or the right.

[0066] Furthermore, although the side portion was an armrest SA in the above embodiment, it is not limited to this. For example, the side portion may be a platform or table, etc., which is wider than the armrest.

[0067] Furthermore, although the above embodiment included an armrest heater 53A and an inner surface heater 53B, the configuration is not limited to this. For example, the side heater may include only an armrest heater. Alternatively, the side heater may include only an inner surface heater.

[0068] Furthermore, although the operating unit 60 was provided on the left armrest SA in the above embodiment, it is not limited to this. For example, the operating unit 60 may be provided on the right armrest SA. Alternatively, the operating unit 60 may be provided on both the left and right armrests SA. By providing the operating unit 60 on both the left and right armrests SA, the heater 50 can be operated regardless of whether the occupant is sitting on the left or right side of the two-seater sofa S.

[0069] Furthermore, although the operating unit 60 was provided on the upper surface of the armrest SA in the above embodiment, it is not limited to this. For example, the operating unit may be provided on the left and right outer or left and right inner sides of the armrest SA. Also, if the sofa S does not have armrests (side parts) on at least one of the left and right sides of the seat S1, the operating unit may be provided on the left or right side of the seat body S0, for example, on the left or right side of the lower support part 310.

[0070] Furthermore, in the above embodiment, as shown in Figure 1, the headrest heater 54 was provided to heat the front surface of the headrest SH, but it is not limited to this. For example, the headrest heater may include a heater that heats the front surface of the headrest and a heater that heats the upper surface of the headrest. Alternatively, the headrest heater may be provided to heat only the upper surface of the headrest.

[0071] Furthermore, in the above embodiment, the headrest SH was configured to be detachable from the backrest S2 (seat body S0), but the invention is not limited to this configuration, and for example, it may be configured to be non-detachable.

[0072] Furthermore, although the heater 50 in the above embodiment included a headrest heater 54, the configuration is not limited to this, and for example, it may be configured without a headrest heater. Also, although the sofa S in the above embodiment included a headrest SH, the configuration is not limited to this, and for example, it may be configured without a headrest.

[0073] Furthermore, the configuration of the notches 513 and 523 in the seat heater 51 and backrest heater 52 is merely an example and is not limited to the configuration of the above embodiment. For example, the number of notches is arbitrary. Also, the direction in which each notch extends and the direction in which multiple notches are aligned may differ from those of the above embodiment, as long as the objective of not causing discomfort to the sitter is achieved.

[0074] Furthermore, in the above embodiment, both the seat heater 51 and the backrest heater 52 had a configuration comprising heater wires 511, 521 and base materials 512, 522 provided with a plurality of notches 513, 523, but the invention is not limited to this. For example, only one of the seat heater or the backrest heater may have a configuration comprising heater wires and a base material provided with a plurality of notches. Also, the seat heater and the backrest heater may not have a structure comprising heater wires and a base material, but may be planar heaters with a structure different from that of the above embodiment.

[0075] Furthermore, although the above embodiment included both a seat heater 51 and a backrest heater 52 in the heater 50, it is not limited to this configuration. For example, the heater may include only one of the seat heater or the backrest heater.

[0076] Furthermore, in the above embodiment, the seat cushion 100 was configured to be detachable from the lower support portion 310, but the invention is not limited to this configuration, and for example, it may be configured to be non-detachable.

[0077] Furthermore, in the above embodiment, the backrest cushion 200 was configured to be detachable from the rear support portion 320, but the invention is not limited to this configuration, and for example, it may be configured to be non-detachable.

[0078] Furthermore, although a two-seater sofa S was used as an example of a seat in the above embodiment, the invention is not limited to this. For example, the seat may be a one-seater sofa or a three-seater sofa. Also, the seat is not limited to a sofa, but may be an armchair, for example. Also, the seat is not limited to a seat for home use, but may be a seat used in amusement facilities or relaxation facilities, for example. Also, the seat may be a vehicle seat or a ride-on seat installed in an automobile, railway car, ship, aircraft, etc.

[0079] Furthermore, the elements described in the above-mentioned embodiments and modifications may be implemented in any combination. [Explanation of symbols]

[0080] 50 Heater 51 Seat heater 52 Backrest heater 53 Side heater 53A Armrest heater 53B Inner side heater 54 Headrest heater 70 Electric wire 100 Seat Cushion 200 Backrest Cushion 310 Lower support part 320 Rear support section 511,521 Heater wires 512,522 Base material 513,523 cuts S Sofa S0 Seat Body S1 seat S2 Backrest SA Armrest SH Headrest

Claims

1. A seat body having a seat and backrest where a person sits, A side portion located on at least one of the left and right sides of the seat portion, which protrudes above the seat portion, A sheet-shaped heater, At least one of the following: a seat heater that heats the surface of the seat facing the person sitting on it, and a backrest heater that heats the surface of the backrest facing the person sitting on it. A side heater that heats the side facing the seated person, A sofa equipped with a heater, The aforementioned side portion is an armrest comprising a pad material and a surface covering that covers the pad material. The side heater includes an armrest heater that heats the upper surface of the armrest. The armrest heater is positioned between the upper surface of the pad material and the surface material. The seat body comprises a seat cushion, a backrest cushion, and a support portion that supports the seat cushion and the backrest cushion. The aforementioned side portion is detachable from the aforementioned support portion. The sofa is provided with a first connector at the point where the support portion and the side portion are separated, for supplying power to the side portion heater. The seat cushion comprises a first cushioning material and a first covering that covers the first cushioning material, and is detachable from the support portion. The seat heater is positioned between the upper surface of the first cushioning material and the first upholstery. The sofa is provided with a second connector for supplying power to the seat heater at the point where the seat cushion and the support are separated. The support portion has a rear support portion that supports the seat cushion and the back cushion from behind. The sofa is characterized in that the second connector is located on the front of the rear support portion.

2. A seat body having a seat and backrest where a person sits, A side portion located on at least one of the left and right sides of the seat portion, which protrudes above the seat portion, A sheet-shaped heater, At least one of the following: a seat heater that heats the surface of the seat facing the person sitting on it, and a backrest heater that heats the surface of the backrest facing the person sitting on it. A side heater that heats the side facing the seated person, A sofa equipped with a heater, The aforementioned side portion is an armrest comprising a pad material and a surface covering that covers the pad material. The side heater includes an inner surface heater that heats the left and right inner surfaces of the armrest. The inner surface heater is positioned between the left and right inner surfaces of the pad material and the outer layer. The seat body comprises a seat cushion, a backrest cushion, and a support portion that supports the seat cushion and the backrest cushion. The aforementioned side portion is detachable from the aforementioned support portion. The sofa is provided with a first connector at the point where the support portion and the side portion are separated, for supplying power to the side portion heater. The seat cushion comprises a first cushioning material and a first covering that covers the first cushioning material, and is detachable from the support portion. The seat heater is positioned between the upper surface of the first cushioning material and the first upholstery. The sofa is provided with a second connector for supplying power to the seat heater at the point where the seat cushion and the support are separated. The support portion has a rear support portion that supports the seat cushion and the back cushion from behind. The sofa is characterized in that the second connector is located on the front of the rear support portion.

3. A seat body having a seat and backrest where a person sits, A side portion located on at least one of the left and right sides of the seat portion, which protrudes above the seat portion, A sheet-shaped heater, At least one of the following: a seat heater that heats the surface of the seat facing the person sitting on it, and a backrest heater that heats the surface of the backrest facing the person sitting on it. A side heater that heats the side facing the seated person, A sofa equipped with a heater, The aforementioned side portion is an armrest comprising a pad material and a surface covering that covers the pad material. The side heater includes an armrest heater that heats the upper surface of the armrest. The armrest heater is positioned between the upper surface of the pad material and the surface material. The seat body comprises a seat cushion, a backrest cushion, and a support portion that supports the seat cushion and the backrest cushion. The aforementioned side portion is detachable from the aforementioned support portion. The sofa is provided with a first connector at the point where the support portion and the side portion are separated, for supplying power to the side portion heater. The aforementioned backrest cushion comprises a second cushioning material and a second covering material that covers the second cushioning material, and is detachable from the support portion. The backrest heater is positioned between the front surface of the second cushioning material and the second surface layer. The sofa is provided with a third connector for supplying power to the backrest heater at the point where the backrest cushion and the support part are separated. The support portion has a rear support portion that supports the seat cushion and the back cushion from behind. The sofa is characterized in that the third connector is located on the front of the rear support portion.

4. A seat body having a seat and backrest where a person sits, A side portion located on at least one of the left and right sides of the seat portion, which protrudes above the seat portion, A sheet-shaped heater, At least one of the following: a seat heater that heats the surface of the seat facing the person sitting on it, and a backrest heater that heats the surface of the backrest facing the person sitting on it. A side heater that heats the side facing the seated person, A sofa equipped with a heater, The aforementioned side portion is an armrest comprising a pad material and a surface covering that covers the pad material. The side heater includes an inner surface heater that heats the left and right inner surfaces of the armrest. The inner surface heater is positioned between the left and right inner surfaces of the pad material and the outer layer. The seat body comprises a seat cushion, a backrest cushion, and a support portion that supports the seat cushion and the backrest cushion. The aforementioned side portion is detachable from the aforementioned support portion. The sofa is provided with a first connector at the point where the support portion and the side portion are separated, for supplying power to the side portion heater. The aforementioned backrest cushion comprises a second cushioning material and a second covering material that covers the second cushioning material, and is detachable from the support portion. The backrest heater is positioned between the front surface of the second cushioning material and the second surface layer. The sofa is provided with a third connector for supplying power to the backrest heater at the point where the backrest cushion and the support part are separated. The support portion has a rear support portion that supports the seat cushion and the back cushion from behind. The sofa is characterized in that the third connector is located on the front of the rear support portion.

5. The sofa according to claim 3 or 4, characterized in that the third connector is located at the lower front of the rear support portion.

6. The sofa according to any one of claims 1 to 5, characterized in that the first connector is located on the side surface of the support portion.

7. The sofa according to claim 6, characterized in that the first connector is located at the rear of the side surface of the support portion.

8. The sofa according to claim 7, characterized in that the first connector is located in the front-rear direction between the front surface of the back cushion and the rear end of the side surface of the support portion.

9. The sofa according to claim 7 or 8, characterized in that the first connector is located in the front-rear direction between the rear surface of the seat cushion and the rear end of the side surface of the support portion.

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