Seat

Abstract

To provide a seat capable of efficiently transferring heat from a heater to a seated person.SOLUTION: A seat 300 comprises: a seat pad 302; a skin 330 for covering the seated person's side of the seat pad; a heater 350 that is arranged between the seat pad and the skin; and a bag body 360 that is arranged between the seat pad and the heater and in which gas is encapsulated.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] 2. Description of the Related Art Conventionally, there is a seat in which a heat insulating material made of high-density urethane is provided between a seat pad and a heater (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-87754 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned technology, the high-density urethane that constitutes the insulation material is prone to heat storage, so it does not have a sufficient insulating effect, and as a result, the heat from the heater cannot be efficiently transferred to the seat occupant.

[0005] An object of the present invention is to provide a seat that can efficiently transfer heat from a heater to an occupant. [Means for solving the problem]

[0006] The seat of the present invention is Seat pad and A skin covering the seat pad on the seat occupant side; A heater disposed between the seat pad and the cover; a bag body disposed between the seat pad and the heater and having a gas sealed therein; It is equipped with: According to the seat of the present invention, heat from the heater can be efficiently transferred to the seated occupant.

[0007] In the seat of the present invention, It is preferable that a plurality of the bags are stacked in the thickness direction of the seat. This allows heat from the heater to be transferred to the occupant more efficiently.

[0008] In the seat of the present invention, The plurality of bags may be disposed at positions different from one another on a projection plane in a thickness direction of the seat. This improves the overall durability of the bag body.

[0009] In the seat of the present invention, The surface of the seat pad facing the seat occupant has a recess, It is preferable that the bag body is housed in the recess. This can prevent the bag body from protruding from the seat pad.

[0010] In the seat of the present invention, The bag may be located only within an area of ​​the heater in a projection plane in a thickness direction of the seat. This allows the heat from the heater to be efficiently transferred to the seated occupant while preventing any decrease in seating comfort.

[0011] In the seat of the present invention, It is preferable that the bag body is configured so that, when a seat occupant is seated on the seat, a pair of wall portions of the bag body opposing each other in the thickness direction of the seat do not come into contact with each other. This allows heat from the heater to be transferred to the occupant more efficiently.

[0012] In the seat of the present invention, The seat may be a vehicle seat. Effect of the Invention

[0013] According to the present invention, it is possible to provide a seat that can efficiently transfer heat from a heater to an occupant. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a seat according to a first embodiment of the present invention. [Diagram 2] 2 is a projection view in the thickness direction showing the cushion sheet of the seat of FIG. 1. FIG. [Diagram 3] 3 is a cross-sectional view of the cushion sheet of FIG. 2 taken along the line AA of FIG. 2. [Figure 4] FIG. 6 is a projection view in the thickness direction showing a cushion sheet of a seat according to a second embodiment of the present invention. [Diagram 5] FIG. 4 is a cross-sectional view corresponding to FIG. 3, showing a cushion sheet of a seat according to a third embodiment of the present invention, taken in the left-right direction. [Figure 6] 11 is a graph showing experimental results of seats according to an embodiment and a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The seat of the present invention can be applied to any type of seat, and can be suitably used for any vehicle seat, particularly for a vehicle seat. When the seat of the present invention is used for a vehicle seat, it can be used for any seat, such as a driver's seat, a passenger seat, or a rear seat.

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a seat according to the present invention will be described with reference to the drawings. The same components are designated by the same reference numerals in the various figures.

[0017] 1 to 3 show a seat 300 according to a first embodiment of the present invention. Fig. 1 is a perspective view of the seat 300 of the present embodiment. 1 to 3, the seat 300 is configured as a vehicle seat. However, the seat 300 may be configured as any type of seat (for example, a vehicle seat). The seat 300 includes a seat pad 302, a cover 330 covering the seat occupant side of the seat pad 302, one or more heaters 350, and one or more bags 360. The seat 300 may further include a frame (not shown) installed on the rear side of the seat pad 302, and a headrest 340 for supporting the head of a seated occupant.

[0018] 1, the seat pad 302 includes a cushion pad 310 on which a seated person sits, and a back pad 320 for supporting the back of the seated person. The cushion pad 310 and the back pad 320 each constitute the seat pad 302. Hereinafter, the cushion pad 310 or the back pad 320 may be simply referred to as the "seat pad 302."

[0019] In this specification, as shown in Figure 1, the directions "up," "down," "left," "right," "front," and "rear" when viewed from a person seated on seat 300 (and thus seat pad 302) will be referred to simply as "up," "down," "left," "right," "front," and "rear," respectively.

[0020] The cushion pad 310 has a main pad portion 311 configured to support the buttocks and thighs of a seated person from below, a pair of side pad portions 312 located on both the left and right sides of the main pad portion 311, raised higher than the main pad portion 311, and configured to support the seated person from both the left and right sides, and a back pad opposing portion 313 located on the rear side of the main pad portion 311 and configured to oppose the back pad 320. The main pad portion 311 is composed of a lower thigh portion 311t configured to support the thighs of the seated person from below, and a lower buttock portion 311h located rearward of the lower thigh portion 311t and configured to support the buttocks of the seated person from below.

[0021] The back pad 320 has a main pad portion 321 configured to support the back of the seated person from the rear side, and a pair of side pad portions 322 located on both the left and right sides of the main pad portion 321, protruding forward more than the main pad portion 321, and configured to support the seated person from both the left and right sides.

[0022] The seat 300 includes a cushion sheet 300A on which a seated person sits, and a back sheet 300B for supporting the back of the seated person. The seat 300 may include only one of the cushion sheet 300A and the back sheet 300B. The seat 300 may further include a headrest 340. The cushion sheet 300A includes a cushion pad 310 which is a seat pad 302, and a cover 330 covering the seat occupant side of the cushion pad 310. The cushion sheet 300A may further include a heater 350 and a bag body 360, as in the example of Fig. 1. The cushion sheet 300A does not have to include the heater 350 and / or the bag body 360. The cushion sheet 300A may further include a frame (not shown) installed on the back side (underside) of the cushion pad 310. The back seat 300B includes a back pad 320, which is the seat pad 302, and a cover 330 that covers the seat occupant side of the back pad 320. The back seat 300B may further include a heater 350 and a bag body 360, as in the example of FIG. 1. The back seat 300B may not include the heater 350 and / or the bag body 360. The back seat 300B may further include a frame (not shown) that is installed on the back side (rear side) of the back pad 320. The heater 350 and the bag body 360 may be provided in at least one of the cushion sheet 300A and the back sheet 300B.

[0023] In the example of Fig. 1, the cushion pad 310 and the back pad 320 are configured separately from each other, but they may be configured integrally with each other. That is, in the example of Fig. 1, the cushion sheet 300A and the back sheet 300B are configured separately from each other, but they may be configured integrally with each other. In addition, in the example of FIG. 1, the headrest 340 is configured separately from the back pad 320 (and thus the back seat 300B), but the headrest 340 may be configured integrally with the back pad 320 (and thus the back seat 300B).

[0024] In this specification, the "thickness direction TD" of the seat pad 302 refers to the up-down direction in the case of the cushion pad 310 (FIG. 1), and in the case of the back pad 320, refers to the direction in which the main pad portion 321 of the back pad 320 extends from the surface (front surface) FS on the seat occupant side to the back surface BS (FIG. 1). The thickness direction TD of the seat 300 is the same as the thickness direction TD of the seat pad 302. In this specification, the "extension direction LD" of the seat pad 302 is a direction perpendicular to the left-right direction and thickness direction TD of the seat pad 302, and refers to the front-rear direction in the case of the cushion pad 310 (FIG. 1), and refers to the direction in which the main pad portion 321 of the back pad 320 extends from the lower surface to the upper surface of the main pad portion 321 (FIG. 1). The extension direction LD of the seat 300 is the same as the extension direction LD of the seat pad 302. Moreover, the "seat occupant side surface (front surface) FS" of the seat pad 302 refers to the upper surface in the case of the cushion pad 310 (FIG. 1), and refers to the front surface in the case of the back pad 320 (FIG. 1). The "back surface BS" of the seat pad 302 is the surface opposite to the seat occupant side surface FS of the seat pad 302, and refers to the lower surface in the case of the cushion pad 310 (FIG. 1), and refers to the rear surface in the case of the back pad 320 (FIG. 1). The "side surface SS" of the seat pad 302 is the surface between the seat occupant side surface FS and the back surface BS of the seat pad 302, and refers to any one of the front surface, rear surface, left surface, or right surface in the case of the cushion pad 310 (FIG. 1), and refers to any one of the lower surface, upper surface, left surface, or right surface in the case of the back pad 320 (FIG. 1).

[0025] The seat 300 of this embodiment will be described in more detail below with reference to FIGS. 2 and 3 show the cushion sheet 300A of the seat sheet 300 of this embodiment shown in FIG. 1. FIG. 2 is a projection view in the thickness direction TD showing the cushion sheet 300A of the seat sheet 300 of FIG. 1. FIG. 3 is an AA cross-sectional view showing the cushion sheet 300A of FIG. 2 in a cross section taken along the line AA of FIG. 2. The line AA of FIG. 2 is parallel to the left-right direction. Although not shown, the back sheet 300B of the seat sheet 300 of this embodiment shown in FIG. 1 can also be configured in the same manner as the example of FIGS. 2 and 3. In the following, unless otherwise specified, the cushion sheet 300A and the back sheet 300B are collectively referred to as the "seat 300". The configuration of the seat 300 described below is applicable to both the cushion sheet 300A and the back sheet 300B. Similarly, in the following, unless otherwise specified, the cushion pad 310 and the back pad 320 are collectively referred to as the "seat pad 302". The configuration of the seat pad 302 described below is applicable to both the cushion pad 310 and the back pad 320.

[0026] The seat pad 302 is made of, for example, a foam made of a flexible resin. As the resin, for example, polyurethane is suitable.

[0027] The skin 330 is preferably made of a material with good breathability (such as cloth), but may be made of a material with low breathability (such as synthetic leather or leather).

[0028] As shown in Fig. 3, the heater 350 is disposed between the seat pad 302 and the cover 330 in the thickness direction TD. The heater 350 is configured to be operated, for example, by electricity. The heater 350 is configured, for example, in a strip shape. The heater 350 has, for example, a strip-shaped member and a heating wire fixed to the strip-shaped member. The strip-shaped member is made of, for example, cloth, felt, or the like. The seat 300 may be provided with only one heater 350, or may be provided with a plurality of heaters 350.

[0029] As shown in Fig. 3, the bag body 360 is disposed between the seat pad 302 and the heater 350 in the thickness direction TD. The bag body 360 has a gas sealed therein, that is, the gas is sealed inside. The bag body 360 is made of, for example, a flexible resin. Examples of the resin include polyethylene and polypropylene. The gas sealed inside the bag body 360 may be any gas, but is preferably, for example, the atmosphere (air), an inert gas, or the like. As the inert gas, nitrogen is preferably used from the viewpoint of availability. The seat 300 may include only one bag body 360, or may include a plurality of bags 360.

[0030] As described above, the seat 300 of this embodiment includes the bag 360 disposed between the seat pad 302 and the heater 350 and filled with gas. The gas has a lower thermal conductivity than, for example, the high-density urethane resin constituting the insulating material of Patent Document 1. Therefore, the bag 360 filled with gas has a higher insulating effect than, for example, the insulating material of Patent Document 1. Therefore, the bag 360 can more effectively prevent the heat from the heater 350 from being transmitted to the seat pad 302, and accordingly, the heat from the heater 350 can be efficiently transmitted to the seated person.

[0031] When manufacturing the seat 300, the bag body 360 may be attached to the pre-formed seat pad 302 by, for example, pasting, or may be integrally molded (e.g., foamed together) with the seat pad 302 when the seat pad 302 is molded.

[0032] Hereinafter, preferred configurations and other embodiments of the present invention will be described with reference to Figs. 4 to 5 as appropriate. Fig. 4 is a projection plane view in the thickness direction TD showing the cushion sheet 300A of the seat sheet 300 according to the second embodiment of the present invention. Hereinafter, the projection plane in the thickness direction TD will be referred to as "projection plane P". Fig. 5 is a drawing corresponding to Fig. 3, and is a cross-sectional view in the left-right direction showing the cushion sheet 300A of the seat sheet 300 according to the third embodiment of the present invention.

[0033] In each embodiment described in this specification, it is preferable that a plurality of bags 360 are stacked in the thickness direction TD of the seat sheet 300 as in each embodiment of Fig. 3 and Fig. 5. In this case, the gases enclosed in the bags 360 are separated, and heat conduction between the bags 360 is difficult, so that the insulating effect of the bags 360 is enhanced. Therefore, compared to a case where only one bag 360 is provided in the thickness direction TD, it is possible to more effectively suppress the heat from the heater 350 from being transmitted to the seat pad 302, and accordingly, it is possible to efficiently transmit the heat from the heater 350 to the seat occupant. However, in each embodiment described in this specification, only one bag body 360 may be provided in the thickness direction TD.

[0034] In each embodiment described in this specification, as in each embodiment of Fig. 3 and Fig. 5, it is preferable that the surface FS of the seat pad 302 facing the seat occupant has a recess 302c, and one or more bags 360 are housed in the recess 302c. This can prevent the bag 360 from protruding from the seat pad 302. In addition, it can prevent the bag 360 from protruding from the seat pad 302, which makes it difficult to attach the cover 330 to the seat pad 302. In addition, it can prevent the bag 360 from protruding from the seat pad 302, which makes it uncomfortable for the seat occupant. The recess 302c opens on a surface FS of the seat pad 302 facing the seat occupant, and terminates just before reaching the back surface BS of the seat pad 302. From the same viewpoint, the total thickness in the thickness direction TD of one or more bag bodies 360 housed in the recess 302c is preferably 1.3 times or less, and more preferably 1.1 times or less, the depth of the recess 302c. Also, from the viewpoint of suppressing discomfort felt by the seated occupant, the total thickness in the thickness direction TD of one or more bag bodies 360 housed in the recess 302c is preferably 0.7 times or more, and more preferably 0.9 times or more, the depth of the recess 302c. However, in each embodiment described in this specification, the surface FS of the seat pad 302 facing the occupant may not have a recess 302c, and one or more bag bodies 360 may be disposed on the surface FS of the seat pad 302 facing the occupant.

[0035] In each embodiment described in this specification, the plurality of bag bodies 360 may be disposed at different positions from each other on the projection plane P in the thickness direction TD of the seat sheet 300, as in the embodiment of Fig. 4. In this case, even if any one of the plurality of bag bodies 360 is damaged, for example, by a hole or the like, the remaining bag bodies 360 can still exert a heat insulating effect, so that the durability of the bag body 360 as a whole can be improved compared to the case where only one bag body 360 is provided on the projection plane P. It is preferable that the multiple bag bodies 360 are arranged so as not to overlap each other on the projection plane P. In this case, the multiple bag bodies 360 may be spaced apart from each other or may be in contact with each other. Furthermore, at each position of the multiple bag bodies 360 arranged so as not to overlap each other on the projection plane P, the bag body 360 may be provided in only one position in the thickness direction TD, or multiple bag bodies 360 may be stacked in the thickness direction TD. The positions of the plurality of bags 360 arranged so as not to overlap each other on the projection plane P may be the same or different from each other in the thickness direction TD. However, in each embodiment described in this specification, on the projection plane P, only one bag body 360 may be provided.

[0036] In each embodiment described in this specification, as in each embodiment of Fig. 2, Fig. 3, and Fig. 4, in the projection plane P in the thickness direction TD of the seat sheet 300, the bag body 360 may be located only within the area of ​​the heater 350. In this case, since the bag body 360 is disposed only in a necessary portion, it is possible to efficiently transfer heat from the heater 350 to the seated person while suppressing a decrease in seating comfort that may occur due to the presence of the bag body 360. From a similar viewpoint, it is particularly preferable that the area of ​​the bag body 360 substantially coincides with the area of ​​the heater 350 on the projection plane P as in the embodiment of FIG. 2 and FIG. However, on the projection plane P, only a portion of the bag body 360 may be located within the area of ​​the heater 350.

[0037] In each embodiment described in this specification, from the viewpoint of improving the insulating effect of the bag body 360, it is preferable that the portion where the heater 350 and one or more bag bodies 360 overlap on the projection plane P occupy 80% or more of the area of ​​the heater 350, and it is more preferable that the portion occupy 90% or more of the area of ​​the heater 350. In each embodiment described in this specification, from the viewpoint of suppressing deterioration in seating comfort, the total area of ​​one or more pouches 360 overlapping with the heater 350 is preferably 120% or less, and more preferably 110% or less, of the area of ​​the heater 350. Here, "the total area of ​​one or more pouches 360 overlapping with the heater 350" refers to the area including the area of ​​the portion where the heater 350 and one or more pouches 360 overlap, and, if there is a portion of the one or more pouches 360 that does not overlap with the heater 350, the area including the area of ​​the portion of the one or more pouches 360 that does not overlap with the heater 350.

[0038] In each embodiment described in this specification, it is preferable that the bag body 360 is configured so that a pair of wall portions 361 (FIG. 3) facing each other in the thickness direction TD of the seat sheet 300 in the bag body 360 do not come into contact with each other (and thus the bag body 360 does not collapse) when a seated person sits on the seat sheet 300. This makes it possible to suppress a decrease in the insulating effect due to the disappearance of the gas layer partitioned inside the bag body 360 when a seated person sits on the seat sheet 300. Therefore, heat from the heater 350 can be transmitted to the seated person more efficiently. Specifically, it is preferable that the bag body 360 is configured so that a pair of wall portions 361 facing each other in the thickness direction TD in the bag body 360 do not come into contact with each other when a load of 450 N or more is applied to the seat sheet 300 when a seated person is seated, and it is even more preferable that the bag body 360 is configured so that a pair of wall portions 361 facing each other in the thickness direction TD in the bag body 360 do not come into contact with each other when a load of 600 N or more is applied to the seat sheet 300 when a seated person is seated. This can be achieved, for example, by selecting a material for the bag body 360 that has sufficiently low stretchability of the bag body 360. Examples of materials for such bag body 360 include polyethylene and polypropylene.

[0039] In each embodiment described in this specification, from the viewpoint of improving the insulating effect of the bag body 360, in a natural state in which no external force is applied to the seat sheet 300, the layer thickness (thickness in the thickness direction TD) of each bag body 360 is preferably 3 mm or more, and more preferably 5 mm or more. In each embodiment described in this specification, from the viewpoint of suppressing a decrease in seating comfort, in a natural state in which no external force is applied to the seat 300, the layer thickness (thickness in the thickness direction TD) of each bag body 360 is preferably 30 mm or less, and more preferably 15 mm or less.

[0040] In each of the embodiments described herein, the heater 350 and the bladder 360 may be located in any portion of the seat pad 302. In the case of the cushion pad 310 (and thus the cushion sheet 300A), from the viewpoint of more effectively warming the seated person, it is preferable that the heater 350 and the bag body 360 are disposed in the main pad portion 311 as in the example of Fig. 1, but in addition to or instead of this, they may be disposed in the side pad portion 312. From the viewpoint of suppressing deterioration in seating comfort, it is preferable that the bag body 360 is not disposed in the underbuttocks 311h as in the example of Fig. 1, but is preferably disposed in the under-thighs 311t and / or the side pad portion 312. However, the bag body 360 may be disposed in the underbuttocks 311h. In the case of the back pad 320 (and thus the back seat 300B), from the viewpoint of warming the seated occupant more effectively, it is preferable that the heater 350 and the bag body 360 are disposed in the main pad portion 321 as in the example of FIG. 1, but in addition to or instead of this, they may be disposed in the side pad portion 322.

[0041] In each embodiment described in this specification, the heater 350 may be fixed to the back surface of the skin 330 by sewing or pasting, etc. Alternatively, as in the embodiment shown in Fig. 5, when the heater 350 has a portion 350a that does not overlap with the bag body 360 in the thickness direction TD, the portion 350a may be fixed to the seat pad 302 by pasting, etc.

[0042] In each embodiment described in this specification, the seat 300 may not include a load sensor, as in the example of FIG. 3, or may include a load sensor at any position in the thickness direction TD. EXAMPLES

[0043] Experiments were carried out using comparative example 1 and examples 1 to 3 of the seat 300, which will now be described. The seat 300 of Comparative Example 1 was provided with a seat pad 302, a cover 330 covering the occupant side of the seat pad 302, and a heater 350 arranged between the seat pad 302 and the cover 330, but was not provided with a bag body 360. The seat 300 of Examples 1 to 3 included a seat pad 302, a cover 330 covering the seat pad 302 on the seat occupant side, a heater 350 disposed between the seat pad 302 and the cover 330, and a bag body 360 disposed between the seat pad 302 and the heater 350 and filled with air. Example 1 included only one bag body 360. Example 2 included two bag bodies 360 stacked in the thickness direction TD. Example 3 included six bag bodies 360 stacked in the thickness direction TD. Examples 1 to 3 had approximately the same thickness for each bag body 360. As described above, Comparative Example 1 and Examples 1 to 3 differed only in the number of bags 360, and the other configurations were substantially the same. In the experiment, the temperature of the surface of the cover 330 facing the seated occupant was continuously measured immediately after the start of heating by the heater in each of Comparative Example 1 and Examples 1 to 3. The results are shown in FIG.

[0044] As can be seen from FIG. 6, in Examples 1 to 3, the temperature of the surface of cover 330 facing the occupant increased more quickly than in Comparative Example 1, and heat from heater 350 was able to be transferred to the occupant more efficiently. [Industrial Applicability]

[0045] The seat of the present invention can be applied to any type of seat, and can be suitably used for any vehicle seat, particularly for a vehicle seat. When the seat of the present invention is used for a vehicle seat, it can be used for any seat, such as a driver's seat, a passenger seat, or a rear seat. [Explanation of symbols]

[0046] 300: Seat, 300A: Cushion seat, 300B: Back seat, 302: seat pad; 302c: recess; 310: cushion pad, 311: main pad portion (seating portion), 311t: lower thigh portion, 311h: lower buttocks portion, 312: side pad portion, 313: back pad facing portion, 320: back pad, 321: main pad section, 322: side pad section, 330: Epidermis, 340: Headrest, 350: heater; 350a: part not overlapping with the bag body; 360: Bag body, 361: Wall part, FS: surface facing the seated person (front surface), SS: side surface, BS: back surface, TD: thickness direction, LD: extension direction

Claims

1. Seat pad and A skin covering the seat pad on the seat occupant side; A heater disposed between the seat pad and the cover; One or more bags arranged between the seat pad and the heater, each containing only gas therein; A seat comprising: The seat is configured such that when a load of 600 N is applied to the seat, a pair of wall portions of each of the bag bodies that face each other in the thickness direction of the seat do not come into contact with each other.

2. The seat according to claim 1 , wherein a plurality of the bags are stacked in a thickness direction of the seat.

3. The seat according to claim 1 or 2, wherein the plurality of bags are disposed at positions different from each other on a projection plane in a thickness direction of the seat.

4. The surface of the seat pad facing the seat occupant has a recess, The seat according to any one of claims 1 to 3, wherein the bag body is housed in the recess.

5. The seat according to any one of claims 1 to 4, wherein the bag is located only within an area of ​​the heater in a projection plane in a thickness direction of the seat.

6. The seat according to any one of claims 1 to 5, wherein the seat is a vehicle seat.

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