JP2020104644A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat including a site where a ventilation amount during seating by an occupant decreases compared to a ventilation amount during non-seating by an occupant.SOLUTION: A vehicle seat includes: a seat cushion; a seat back; and an air blower 30. At least one of the seat cushion and the seat back includes: a seat pad 11; a skin 12; a first seat layer 13; and a second seat layer 14 having air permeability lower than the air permeability of the first seat layer 13. Through-holes 11h are formed in the seat pad 11. The second seat layer 14 is disposed at a position overlapping the through-holes 11h in a lamination direction. The first seat layer 13 has an intermediate part 13a interposed between the seat pad 11 and the second seat layer 14. The intermediate part 13a applies compression using a load that acts during seating by an occupant, and thereby decreases an air quantity passing through the intermediate part 13a to be less than an air quantity passing through the intermediate part 13a in a state before the load is applied to the intermediate part 13a.SELECTED DRAWING: Figure 3

Description

This invention relates to a vehicle seat.

Conventionally, as a vehicle seat, one provided with a blower is known. For example, Japanese Unexamined Patent Application Publication No. 2018-118719 (hereinafter referred to as "Patent Document 1") discloses a seat air conditioner including a seat cushion, a skin, a blower, and a ventilation path member. The seat cushion is provided with a through hole that vertically penetrates the seat cushion. The skin covers the seat cushion. The blower is arranged below the seat cushion and at a position vertically overlapping the through hole. The ventilation passage member is arranged between the seat cushion and the skin. The ventilation path member is composed of a plurality of tubes communicating with each other. The air passage member is formed by an air inlet/outlet formed at a position facing the through hole, a rear vent formed at a position facing the epidermis, and a front side facing the epidermis and in front of the rear vent. And a ventilation port. Therefore, the airflow discharged upward from the blower passes through the through hole and the air inlet/outlet, and then is discharged toward the epidermis through the rear ventilation port and the front ventilation port.

When an occupant is seated on this seat cushion, the tubes constituting the ventilation passage material are elastically deformed, but since the adjacent tubes support each other, the tubes do not collapse and the flow paths in the tubes are Is maintained. Therefore, even when the occupant is seated on the seat cushion, the airflow toward the buttocks and thighs of the occupant is secured.

JP, 2018-118719, A

In the vehicle seat as described in Patent Document 1, there is a need to provide a portion where the ventilation amount when the occupant is seated is smaller than the ventilation amount when the occupant is not seated. However, in the seat air conditioner described in Patent Document 1, the ventilation amount cannot be adjusted when the occupant is seated or not seated.

An object of the present invention is to provide a vehicle seat having a portion in which the ventilation amount when the occupant is seated is smaller than the ventilation amount when the occupant is not seated.

A vehicle seat according to one aspect of the present invention includes a seat cushion that constitutes a seat portion, a seat back that supports a back portion of an occupant seated on the seat cushion, and a blower. At least one of the seat cushion and the seat back includes a seat pad that supports an occupant, a skin that covers the seat pad, a first seat layer that is disposed between the seat pad and the skin, and A second sheet layer having an air permeability lower than that of the first sheet layer. The blower is arranged on the side opposite to the side on which the first sheet layer is arranged with reference to the sheet pad in the stacking direction of the seat pad, the first sheet layer, and the skin. The seat pad is formed with a through hole that allows ventilation between the blower and the skin. The second sheet layer is arranged at a position overlapping the through hole in the stacking direction. The first seat layer has an interposition part interposed between the seat pad and the second seat layer, and the interposition part is compressed by a load acting when the occupant is seated, thereby the interposition part. The amount of air passing through the intervening part is made lower than the amount of air passing through the interposing part before the load is applied to the interposing part.

In the present vehicle seat, the interposition part of the first seat layer is compressed by the load acting when the occupant is seated, so that the air volume passing through the interposition part is smaller than the air volume passing through the interposition part when the occupant is not seated. descend. Therefore, by forming the intervening portion at a portion where the ventilation amount when the occupant is seated is desired to be lower than the ventilation amount when the occupant is not seated, the ventilation amount when the occupant is seated at that portion is effectively reduced.

Further, the second sheet layer is preferably arranged in the first sheet layer.

By doing so, the above effect can be more reliably obtained.

Further, the second sheet layer may have an area larger than the area of the through hole. In this case, it is preferable that the second sheet layer is arranged at a position where it overlaps with the through hole over the entire area in the stacking direction.

With this configuration, the amount of air passing through the through hole of the seat pad is further reduced by compressing the intervening portion when the occupant is seated.

A vehicle seat according to another aspect of the present invention includes a seat cushion that constitutes a seat portion, a seat back that supports a back portion of an occupant seated on the seat cushion, and a blower. At least one of the seat cushion and the seat back, a seat pad that supports an occupant, an outer skin that covers the seat pad, a first seat layer disposed between the seat pad and the outer skin, the seat A second sheet layer that is disposed between the pad and the skin and that has a gas permeability lower than that of the first sheet layer. The blower is arranged on the side opposite to the side on which the first sheet layer is arranged with reference to the sheet pad in the stacking direction of the seat pad, the first sheet layer, and the skin. The seat pad is formed with a through hole that allows ventilation between the blower and the skin. A plurality of slits that allow ventilation between the blower and the skin are formed in a portion of the second sheet layer that overlaps the through hole in the stacking direction. The second seat layer is deformed so as to close the slit by the load applied when the occupant is seated.

In this vehicle seat, since the slit of the second seat layer is closed by the load applied when the occupant is seated, the amount of air passing through the second seat layer is the same as that in the state before the load acts on the second seat layer. It is lower than the air volume that passes through the two sheet layers. Therefore, by forming a slit in a portion where it is desired to reduce the ventilation amount when the occupant is seated compared to the ventilation amount when the occupant is not seated, the ventilation amount when the occupant is seated in that portion is effectively reduced.

Further, the second sheet layer may have a plurality of inter-slit elements formed between the slits that are adjacent to each other. In this case, one surface in the stacking direction of one of the inter-slit elements of the plurality of inter-slit elements is adjacent to the one of the inter-slit elements of the plurality of inter-slit elements. It is preferable that the surface of the inter-slit element on the other side in the stacking direction overlaps in the stacking direction.

By doing so, the above effect can be more reliably obtained.

The second sheet layer is preferably arranged between the seat pad and the first sheet layer.

As described above, according to the present invention, it is possible to provide a vehicle seat having a portion in which the ventilation amount when the occupant is seated is smaller than the ventilation amount when the occupant is not seated.

It is a perspective view which shows roughly the whole structure of the vehicle seat of 1st Embodiment of this invention. It is sectional drawing in the II-II line in FIG. It is a figure which shows the state in which the occupant was seated in the same cross section as FIG. It is sectional drawing in the same position as FIG. 2 of the vehicle seat of 2nd Embodiment of this invention. It is a figure which shows the state in which the occupant was seated in the same cross section as FIG.

Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are designated by the same reference numerals.

(First embodiment)
FIG. 1 is a perspective view schematically showing the overall structure of a vehicle seat according to a first embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II in FIG. The vehicle seat 1 functions as a vehicle seat. As shown in FIGS. 1 and 2, the vehicle seat 1 of the present embodiment includes a seat cushion 10, a seat back 20, a blower 30, and a blower flow passage 34.

The seat cushion 10 constitutes a seat portion. The seat cushion 10 includes a seat pad 11, an outer skin 12, a first seat layer 13, and a second seat layer 14.

The seat pad 11 elastically supports the occupant. The seat pad 11 is made of, for example, polyurethane (density: 10 kg/m ^{3 to} 60 kg/m ³ ). The seat pad 11 is formed with a plurality of through holes 11h penetrating the seat pad 11 in the thickness direction (vertical direction in FIG. 2).

The skin 12 covers the seat pad 11. The skin 12 is made of leather (natural leather or synthetic leather). The skin 12 is provided with a plurality of holes 12h. Note that the illustration of the hole 12h is omitted in FIG.

The first sheet layer 13 is arranged between the seat pad 11 and the skin 12. Air permeability of the first sheet layer 13 ^{is 200cc / cm 2 · sec~400cc / cm} 2 · about sec. The first sheet layer 13 is made of highly breathable slab urethane or the like. The air permeability is the amount of air that has passed through the sample when the sample made of the material used for the first sheet layer 13 is provided in the air permeation amount measuring device and air is sucked at a constant speed by the suction fan. Indicated by.

The second sheet layer 14 has an air permeability lower than that of the first sheet layer 13. Air permeability of the second sheet layer 14 ^{is 0cc / cm 2 · sec~10cc / cm} 2 · about sec. The second sheet layer 14 is made of a low air-permeable slab urethane, leather, resin film, or the like. The thickness of the second sheet layer 14 is smaller than the thickness of the first sheet layer 13.

The blower 30 has a side opposite to the side on which the first sheet layer 13 is arranged with the seat pad 11 as a reference in the stacking direction of the seat pad 11, the first sheet layer 13, and the skin 12 (vertical direction in FIG. 1) (the present embodiment). In the lower side). The blower 30 is arranged at a position overlapping one through hole 11h of the plurality of through holes 11h in the stacking direction. The blower 30 produces an airflow flowing between the seat pad 11 and the skin 12. In the present embodiment, the blower 30 generates an air flow from the lower portion of the seat pad 11 toward the skin 12 through the through hole 11h and the first sheet layer 13. That is, each through hole 11h allows ventilation between the blower 30 and the skin 12.

The blower flow path 34 connects the blower 30 and each through hole 11h. Therefore, an airflow is formed from the blower 30 toward the epidermis 12 through the through holes 11h through the blower flow path 34.

The second sheet layer 14 has an interposition part 13a formed by a part of the first sheet layer 13 between the seat pad 11 and the second sheet layer 14 at a position overlapping the through hole 11h in the stacking direction. It is arranged at the position where it is formed. In other words, the first sheet layer 13 has the interposition portion 13a that is interposed between the seat pad 11 and the second sheet layer 14. In the present embodiment, the second sheet layer 14 is arranged inside the first sheet layer 13. More specifically, the second sheet layer 14 is arranged in the first sheet layer 13 at a portion located closer to the seat pad 11 than the central portion of the first sheet layer 13 in the stacking direction. The second sheet layer 14 is arranged in the first sheet layer 13 by dividing the first sheet layer 13 into two in the thickness direction. The second sheet layer 14 has an area larger than the area of each through hole 11h. The second sheet layer 14 is arranged at a position where it overlaps with the through hole 11h over the entire area in the stacking direction.

Here, the air volume passing through the interposition part 13a will be described with reference to FIGS. FIG. 3 is a diagram showing a state in which an occupant is seated in the same cross section as FIG.

When the seat cushion 10 is not seated by an occupant, the airflow generated by the blower 30 mainly travels toward the skin 12 through the through hole 11h and the interposition part 13a as shown by the arrow in FIG. It is blown out from the hole 12h.

On the other hand, when the occupant sits on the seat cushion 10, as shown in FIG. 3, the interposition part 13a is compressed by the load acting when the occupant is seated. By being compressed by the load, the interposition part 13a passes through the interposition part 13a in the state before the load acts on the interposition part 13a (the state shown in FIG. 2) by passing through the interposition part 13a. Lower than the required air flow. Therefore, the amount of air passing through the interposition part 13a when the occupant is seated is lower than the amount of air passing through the interposition part 13a when the occupant is not seated. It should be noted that, even when the occupant is seated, the portion of the seat cushion 10 to which a large load is not applied ensures the ventilation through the intervening portion 13a as in the case where the occupant is not seated.

The seat back 20 supports the back of an occupant seated on the seat cushion 10. The front surface of the seat back 20 forms a backrest surface. The structure of the seat back 20 is similar to that of the seat cushion 10. That is, the seat back 20 includes a seat pad (not shown) having a plurality of through holes 21h, a skin 22 having a plurality of holes, a first sheet layer (not shown) having an intervening portion, and a first sheet layer. A second sheet layer (not shown) having an air permeability lower than the air permeability. A blower 30 is provided behind the seat pad of the seat back 20.

As described above, in the vehicle seat 1 of the present embodiment, the intervening portion 13a of the first seat layer 13 is compressed by the load acting when the occupant is seated, so the air volume that passes through the intervening portion 13a when the occupant is seated. However, the amount of air that passes through the intervening portion 13a when the occupant is not seated is lower than that. Therefore, by forming the intervening portion 13a at a portion (for example, a portion supporting the buttocks) where it is desired to reduce the ventilation amount when the occupant is sitting, the ventilation amount when the occupant is not sitting The amount of ventilation at that time is effectively reduced.

Further, since the second seat layer 14 is arranged at a position where it overlaps with the through hole 11h over the entire area in the stacking direction, the air volume passing through the through hole 11h is reduced by the compression of the interposition portion 13a by the seating of the occupant. It will decrease more reliably.

(Second embodiment)
Next, a vehicle seat 1 according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a cross-sectional view of the vehicle seat according to the second embodiment of the present invention at the same position as in FIG. FIG. 5 is a diagram showing a state in which an occupant is seated in the same cross section as FIG. In the second embodiment, only the parts different from the first embodiment will be described, and the description of the same structure, operation, and effect as those of the first embodiment will not be repeated.

In this embodiment, the structure of the second sheet layer 16 is different from that of the first embodiment. The second sheet layer 16 is arranged between the seat pad 11 and the skin 12. Specifically, the second sheet layer 16 is arranged between the seat pad 11 and the first sheet layer 13. A plurality of slits S that allow ventilation between the blower 30 and the skin 12 are formed in a portion of the second sheet layer 16 that overlaps the through hole 11h in the stacking direction. In other words, the second sheet layer 16 has the ventilation amount adjusting portion 16a in which the plurality of slits S are formed.

The ventilation amount adjusting section 16a has a plurality of inter-slit elements 17 formed between the slits S that are adjacent to each other. Each inter-slit element 17 has a first surface 17a, a second surface 17b, a first side surface 17c, and a second side surface 17d.

The first surface 17a is formed on one side (the upper side in FIGS. 4 and 5) in the stacking direction.

The second surface 17b is formed on the other side (lower side in FIGS. 4 and 5) in the stacking direction.

The first side surface 17c and the second side surface 17d define the slit S. That is, the first side surface 17c of the one inter-slit element 17 and the second side surface 17d of the inter-slit element 17 adjacent to the one inter-slit element 17 face each other with a gap corresponding to the slit S therebetween.

The first surface 17a of the one inter-slit element 17 overlaps the second surface 17b of the one inter-slit element 17 adjacent to the one inter-slit element 17 in the stacking direction. That is, the first side surface 17c and the second side surface 17d are inclined with respect to the stacking direction.

As shown in FIG. 5, the ventilation amount adjusting portion 16a of the second seat layer 16 is deformed so as to close the slit S by the load acting when the occupant is seated. More specifically, when the load acts on the air flow rate adjusting portion 16a, the first side surface 17c of the one inter-slit element 17 and the second side surface 17d of the one inter-slit element 17 adjacent to the one inter-slit element 17 mutually. The slit S is closed by the contact. Therefore, the amount of air passing through the ventilation amount adjusting unit 16a when the occupant is seated is lower than the amount of air passing through the ventilation amount adjusting unit 16a when the occupant is not seated.

As described above, also in the present embodiment, a portion is formed in which the ventilation amount when the occupant is seated is smaller than the ventilation amount when the occupant is not seated.

It should be understood that the embodiments disclosed this time are exemplifications in all respects and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

For example, in the first embodiment, the second sheet layer 14 may be arranged between the first sheet layer 13 and the skin 12, or inside the skin 12.

In addition, in the second embodiment, the second sheet layer 16 may be arranged between the first sheet layer 13 and the skin 12.

Further, the structure for adjusting the ventilation amount by the interposition part 13a in the first embodiment and the structure for the ventilation amount adjusting part 16a in the second embodiment may be provided only on one of the seat cushion 10 and the seat back 20. Good.

1 Vehicle Seat, 10 Seat Cushion, 11 Seat Pad, 11h Through Hole, 12 Outer Skin, 12h Hole, 13 First Seat Layer, 13a Intervening Part, 14 Second Seat Layer, 16 Second Seat Layer, 16a Ventilation Adjusting Part , 17 inter-slit elements, 17a first surface, 17b second surface, 17c first side surface, 17d second side surface, 20 seat back, 30 blower, 34 blower flow path, S slit.

Claims (6)

A seat cushion that makes up the seat,
A seat back that supports the back of an occupant seated on the seat cushion,
And a blower,
At least one of the seat cushion and the seat back,
A seat pad that supports the occupant,
A skin covering the seat pad,
A first sheet layer disposed between the seat pad and the skin;
A second sheet layer having an air permeability lower than that of the first sheet layer,
The blower is arranged on the side opposite to the side on which the first sheet layer is arranged with reference to the sheet pad in the stacking direction of the seat pad, the first sheet layer and the skin,
The seat pad is formed with a through hole that allows ventilation between the blower and the skin,
The second sheet layer is arranged at a position overlapping the through hole in the stacking direction,
The first sheet layer has an interposition portion interposed between the seat pad and the second sheet layer,
The intervening section compresses the air volume passing through the interposing section by compressing with the load acting when the occupant is seated, so that the air volume passing through the interposing section in a state before the load acts on the interposing section is smaller than the air volume passing through the interposing section. Lowering vehicle seats. The vehicle seat of claim 1, wherein the second seat layer is disposed within the first seat layer. The second sheet layer has an area larger than the area of the through hole,
The vehicle seat according to claim 1 or 2, wherein the second sheet layer is arranged at a position overlapping the entire area of the through hole in the stacking direction. A seat cushion that makes up the seat,
A seat back that supports the back of an occupant seated on the seat cushion,
And a blower,
At least one of the seat cushion and the seat back,
A seat pad that supports the occupant,
A skin covering the seat pad,
A first sheet layer disposed between the seat pad and the skin;
A second sheet layer, which is disposed between the seat pad and the outer skin and has a gas permeability lower than that of the first sheet layer;
The blower is arranged on the side opposite to the side on which the first sheet layer is arranged with reference to the sheet pad in the stacking direction of the seat pad, the first sheet layer and the skin,
The seat pad is formed with a through hole that allows ventilation between the blower and the skin,
In the portion of the second sheet layer that overlaps the through hole in the stacking direction, a plurality of slits that allow ventilation between the blower and the skin are formed,
The vehicle seat, wherein the second seat layer is deformed so as to close the slit by a load applied when the occupant is seated. The second sheet layer has a plurality of inter-slit elements formed between the slits adjacent to each other,
One surface in the stacking direction of one of the inter-slit elements of the plurality of inter-slit elements, the one of the inter-slit elements adjacent to the one of the inter-slit elements of the plurality of inter-slit elements The vehicle seat according to claim 4, wherein the surface of the other side in the stacking direction overlaps with the surface in the stacking direction. The vehicle seat according to claim 4 or 5, wherein the second seat layer is disposed between the seat pad and the first seat layer.

Images