JP6669973B2 - Sheet - Google Patents

Description

  The present invention relates to a seat including a cushion pad.

  Conventionally, cushion pads formed from foam materials having different hardnesses have been known. For example, Patent Document 1 has a central portion (seat surface section) and left and right side portions (frames) projecting above the central portion, and at least one of the side portions such as an outer region of the side portion. There is disclosed a seat cushion in which left and right portions including a portion are made of a rigid foam material, and an inner portion thereof is made of a soft foam material.

JP-A-63-172614

  By the way, it is desirable that the seat does not easily give a feeling of fatigue even if the user sits for a long time, but the prior art does not consider this point.

Therefore, an object of the present invention is to provide a seat that can reduce a feeling of fatigue even when sitting for a long time.
Another object of the present invention is to reduce the thickness of the cushion pad.
It is another object of the present invention to stably support a seated person while ensuring comfortable sitting.
Another object of the present invention is to realize comfortable sitting comfort.

  In order to achieve the above object, a seat according to the present invention is a seat including a cushion pad, wherein the cushion pad has a first pad layer and a first pad layer on both left and right sides of a hip point of a seated person. In the cross section orthogonal to the front-rear direction passing through the hip point, the second pad layer has a right and left second pad layer harder than the first pad layer. The boundary surface of the cushion pad is located on the inner side in the left-right direction of the cushion pad as it goes down, and has a shape that is recessed downward.

  According to such a configuration, the boundary surface between the second pad layer and the first pad layer is located more inward in the left-right direction as it goes down, and has a shape that is recessed downward. Layer boundaries can be adapted to the shape of the human body. Then, when the person sits on the seat, the side of the buttocks and thighs of the seated person can be supported by the second pad layer, so that the pressure around the ischia is relatively reduced, and the area around the ischia and the buttocks and the large The occupant can be supported in good balance by the entire thigh. As a result, the blood circulation around the ischial of the seated person is less likely to be deteriorated, so that a feeling of fatigue can be reduced even when sitting for a long time.

  In the seat described above, the cushion pad has left and right grooves for hanging a skin material on both left and right sides of the hip point, and the second pad layer straddles the corresponding groove in the left and right direction. May be arranged.

  According to this, the width of the second pad layer in the left-right direction can be ensured as compared with the case where the second pad layer is arranged only inside the groove in the left-right direction. In particular, the shape of the buttocks and thighs can be made to conform to the shape of the side part in a wide range from side to side. Thus, when a person sits on the seat, the buttocks and thighs of the seated person can be firmly supported by the second pad layer, so that fatigue can be reduced even when sitting for a long time. . Further, when the second pad layer is arranged only on the outer side in the left-right direction of the groove, the second pad layer may be arranged at a position distant from the occupant, and the function of the second pad layer may not be sufficiently exhibited. However, by arranging the second pad layer so as to straddle the groove in the left-right direction, the function of the second pad layer can be sufficiently exhibited, so that the feeling of fatigue can be reduced even when sitting for a long time. be able to.

  In the above-described sheet, the second pad layer may be configured such that a portion on the inner side in the left-right direction with respect to the groove is thinner toward the inner side in the left-right direction.

  According to this, the cushion pad can be made thinner than when the thickness of the second pad layer is constant.

  In the above-described sheet, the first pad layer may be configured such that a portion inside the groove in the left-right direction is thinner toward the outside in the left-right direction.

  According to this, the cushion pad can be made thinner than when the thickness of the first pad layer is constant.

  In the above-described sheet, the second pad layer may have an extending portion extending inward in the left-right direction behind the hip point.

  According to this, the rear side portion of the buttocks of the seated person can be supported by the hard second pad layer via the soft first pad layer, so that the seated person can be stably supported while ensuring comfortable sitting. .

  In the above-described sheet, the left and right second pad layers may be configured to be connected to each other by a left and right connecting portion located behind the hip point.

  According to this, the whole rear part of the buttocks of the seated person can be supported by the hard second pad layer via the soft first pad layer, so that it is possible to stably support the seated person while ensuring comfortable sitting.

  In the above-mentioned sheet, the connecting portion may be arranged below the first pad layer, and a boundary surface with the first pad layer may be located further forward as it goes down.

  According to this, a shape along the shape from the buttocks to the waist of the human body is formed by the boundary surface between the connection portion and the first pad layer, so when a person sits on the seat, a sudden change in hardness is felt. Therefore, comfortable sitting comfort can be realized.

  In the above-mentioned sheet, the second pad layer has a range from the hip point to a first distance outward in the left-right direction, a range from the hip point to a second distance rearward, and a third range from the hip point forward. A configuration that is not arranged in a range up to the distance can be adopted.

  According to this, if there is a hard second pad layer near the hip point, pressure is likely to be applied around the ischial bone, and the degree of reduction of the feeling of fatigue may be reduced. However, the second pad layer near the hip point may be reduced. By not being placed, the pressure around the ischia can be reduced. This makes it harder for the blood circulation around the ischium of the seated person to worsen, so that the feeling of fatigue can be reduced even when sitting for a long time.

  In the above-described sheet, the left and right second pad layers may have a configuration in which at least a part of the width in the left-right direction before the hip point becomes narrower as it goes forward.

  According to this, since the hard second pad layer is arranged so as to gradually move away from the thigh of the seated person as it moves forward, when a person sits on the seat, a sudden change in hardness is felt. Therefore, comfortable sitting comfort can be realized.

  The seat includes a plurality of support members extending back and forth to support the cushion pad from below, wherein the plurality of support members include a first support member disposed at the center in the left-right direction and the first support member. Left and right second support members disposed on both left and right sides of the first support member, wherein the second pad layer is disposed on the second support member at least at the position of the hip point in the front-rear direction, A configuration that is not arranged on the member can be adopted.

  According to this, since the left and right second pad layers at the hip point can be supported from below by the left and right second support members, it is possible to prevent the second pad layer from sinking down when a person sits on the seat. Can be suppressed. As a result, the function of the second pad layer can be sufficiently exerted, so that the feeling of fatigue can be further reduced even when sitting for a long time. In addition, since the first pad layer near the hip point can be supported from below by the first support member, it is possible to prevent the soft first pad layer from sinking too much when a person sits on the seat, Comfortable sitting comfort can be realized.

  According to the present invention, fatigue can be reduced even when sitting for a long time.

  Further, according to the present invention, by arranging the second pad layer so as to straddle the groove of the cushion pad in the left-right direction, it is possible to further reduce the feeling of fatigue even when sitting for a long time.

  Further, according to the present invention, the cushion pad can be made thinner by making the portion on the inner side in the left-right direction smaller than the groove in the second pad layer inward in the left-right direction.

  Also, according to the present invention, the cushion pad can be made thinner by making the portion inside the groove in the first pad layer in the left-right direction thinner outward in the left-right direction.

  Further, according to the present invention, by providing the extension portion behind the hip point of the second pad layer, it is possible to stably support the occupant while securing the sitting comfort.

  Further, according to the present invention, by connecting the left and right second pad layers at the connecting portion behind the hip point, it is possible to stably support the occupant while securing sitting comfort.

  Further, according to the present invention, a comfortable sitting comfort is realized by adopting a configuration in which the connection portion disposed below the first pad layer is positioned forward as the boundary surface with the first pad layer is lowered. can do.

  Further, according to the present invention, by not disposing the second pad layer near the hip point, the feeling of fatigue can be reduced even when sitting for a long time.

  Further, according to the present invention, a comfortable sitting comfort can be realized by narrowing at least a part of the width of the left and right second pad layers in front of the hip point in the left-right direction toward the front.

  Further, according to the present invention, the second pad layer is disposed on the second support member at least at the position of the hip point in the front-rear direction, and is not disposed on the first support member. A feeling of fatigue can be further reduced, and a comfortable sitting comfort can be realized.

1 is a perspective view of a vehicle seat as a seat according to an embodiment. It is a perspective view of a seat frame built in a vehicle seat. It is the figure which looked at the cushion pad concerning an embodiment from the upper part. FIG. 4 is a sectional view of the seat cushion corresponding to a section taken along line IV-IV of FIG. 3. FIG. 5 is a cross-sectional view of the seat cushion corresponding to a VV cross section in FIG. 3. It is sectional drawing of the seat cushion in the state where the person sat. It is the figure which looked at the cushion pad concerning the 1st modification from the upper part. It is the figure which looked at the cushion pad concerning the 2nd modification from the upper part. It is the figure which looked at the cushion pad concerning the 3rd modification from above.

Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings. In addition, in this specification, front and rear, left and right, and up and down are based on the front and rear, left and right, and up and down as seen from a person sitting on a seat (a seated person).
As shown in FIG. 1, the seat according to the present embodiment is configured as a vehicle seat S mounted on an automobile, and includes a seat cushion S1, a seat back S2, and a headrest S3.

  Inside the vehicle seat S, a seat frame F as shown in FIG. The seat frame F includes a cushion frame F1 forming a skeleton of the seat cushion S1, a back frame F2 forming a skeleton of the seat back S2, and a headrest frame (not shown) forming a skeleton of the headrest S3. The vehicle seat S is configured by covering a seat frame F with a pad material made of urethane foam or the like and a skin material made of cloth, leather, or the like.

  The cushion frames F1 are disposed to be separated from each other in the left and right directions and extend in the front-rear direction, left and right side frames 21, a front frame 22 connecting front ends of the left and right side frames 21, and a rear end of the left and right side frames 21. And a rear frame 23 that connects them.

Each side frame 21 includes a side wall 21A facing in the left-right direction, an upper flange 21B extending left and right inward from the upper end of the side wall 21A, and a lower flange 21C extending left and right inward from the lower end of the side wall 21A. ing.
The front frame 22 is a frame made of a metal plate, a so-called pan frame. The front frame 22 is provided with four hooks 22 </ b> A arranged side by side on the upper surface, spaced apart left and right, by cutting and raising a sheet metal that forms the front frame 22.
The rear frame 23 is a frame made of a pipe. The rear frame 23 is provided with four hooks 23 </ b> A arranged side by side so as to be separated to the left and right.

  In the cushion frame F1, four S springs 30 as an example of a plurality of support members are provided on the front frame 22 and the rear frame 23. Each S spring 30 is an elastically deformable member that extends in the front-rear direction while alternately bending in the left-right direction, and supports a cushion pad 40 described below from below (see FIG. 4). The four S springs 30 are arranged side by side on the left and right, and include a first S spring 31 as an example of a first support member and a second S spring 32 as an example of a second support member.

  Two first S springs 31 are arranged at the center in the left-right direction inside the cushion frame F1. The first S spring 31 is arranged so as to pass right below the sit bone of the seated person.

  A total of two second S springs 32 are arranged, one each on the left and right sides of the first S spring 31 inside the cushion frame F1. In other words, the left and right second S springs 32 are arranged left and right apart from each other, and two first S springs 31 are arranged between them. The second S springs 32 are arranged on the left and right sides as a whole with respect to a part of the seated person's ischia that protrudes downward. More specifically, the center position of the second S spring 32 in the left-right direction is disposed on the left and right outer sides of a part of the seated person's ischia that protrudes most downward. The distance (pitch) D1 between the center positions of the two second S springs 32 in the left-right direction is, for example, 21 to 27 cm, preferably 22 to 26 cm.

  The front ends of the first S spring 31 and the second S spring 32 are hooked on hooks 22A provided on the front frame 22, respectively, and the rear ends of the first S spring 31 and the second S spring 32 are provided on the rear frame 23, respectively. Hooked on hook 23A. Thus, the first S spring 31 and the second S spring 32 are provided so as to span the front frame 22 and the rear frame 23.

The cushion frame F1 is covered with a cushion pad 40 as a pad material as shown in FIGS. 3 and 4, and a skin material 50.
The cushion pad 40 has a central portion 41 and left and right side portions 42 provided on both left and right sides of the central portion 41 and projecting above the central portion 41. The cushion pad 40 has a suspension groove 43 for suspending the skin material 50.

The suspension groove 43 includes left and right first grooves 43A extending in the front-rear direction, and second grooves 43B and third grooves 43C extending in the left-right direction.
The left and right first grooves 43A are examples of grooves, and are formed so as to extend along the boundary between the central portion 41 and each side portion 42 on both the left and right sides of the hip point HP. In this specification, the hip point HP is the position of the hip point when the 3D mannequin based on SAE J-826 is seated on the seat.
The second groove 43B is formed on the front side of the hip point HP so as to connect the left and right first grooves 43A near the center in the front-rear direction.
The third groove 43C is formed on the rear side of the hip point HP so as to connect the rear portions of the left and right first grooves 43A.

  A suspension wire 44 for suspending the skin material 50 in the suspension groove 43 is embedded in the cushion pad 40 by insert molding. The suspension wire 44 is arranged along the suspension groove 43 and is partially exposed from a plurality of holes 45 formed at the bottom of the suspension groove 43. The skin material 50 is fixed to the cushion pad 40 by engaging the hook members 55 with the exposed portions of the hanging wires 44.

In the present embodiment, the cushion pad 40 has a first pad layer 100 and left and right second pad layers 200 that are harder than the first pad layer 100.
The first pad layer 100 is a portion that forms an upper layer (surface layer) of the cushion pad 40.

  The second pad layer 200 is a part that forms a layer below the cushion pad 40, and is arranged below the first pad layer 100. As shown in FIG. 3, each of the left and right second pad layers 200 has a main body 210 extending in the front-rear direction and an extension 220 extending inward in the left-right direction from the rear end of the main body 210. . The extending portions 220 of the left and right second pad layers 200 are connected to each other and integrated to form a connecting portion 230. For this reason, the left and right second pad layers 200 have a substantially U-shape connected by a connecting portion 230 extending left and right. In the present embodiment, in the left and right second pad layers 200, both the main body 210 and the extending part 220 (the connecting part 230) are arranged below the first pad layer 100. That is, the second pad layer 200 is not exposed on the upper side (front side) of the cushion pad 40.

  The left and right second pad layers 200 are disposed such that the main body 210 is separated to the left and right at positions on both the left and right sides of the hip point HP of the seated person. Each of the second pad layers 200 is arranged so that the main body 210 extends in the front-rear direction from the vicinity of the second groove 43B to the vicinity of the rear end of the first groove 43A.

  In each second pad layer 200, the main body 210 is disposed so as to straddle the corresponding first groove 43A in the left-right direction. Specifically, the main body 210 of the second pad layer 200 on the left is disposed so as to straddle the first groove 43A on the left, and the main body 210 of the second pad layer 200 on the right is connected to the first groove 43A on the right. It is arranged to straddle. Specifically, each main body 210 has a predetermined width in the left-right direction, and is arranged below the corresponding first groove 43A. In each main body 210, the left and right outer edges are arranged left and right outside the corresponding first groove 43A, and the left and right inner edges are arranged left and right inside the corresponding first groove 43A.

  In the second pad layers 200 on the left and right, each extension 220 (connection 230) is located behind the hip point HP. Specifically, each extension 220 (connection 230) is arranged on the rear side of the third groove 43C.

  The second pad layer 200 has a range extending from the hip point HP outward in the left-right direction to a first distance D11, a range extending from the hip point HP to a second distance D12 behind, and a range extending from the hip point HP when viewed from above and below. It is not arranged in the range up to the third distance D13. That is, the second pad layer 200 is not arranged in a predetermined range around the hip point HP when viewed from above and below. Note that, in the present embodiment, the second pad layer 200 is not arranged before the second groove 43B.

  Further, when viewed from above and below, the second pad layer 200 is disposed on the second S spring 32 and not disposed on the first S spring 31 at the position of the hip point HP in the front-rear direction. Specifically, the left second pad layer 200 has the main body 210 disposed on the rear portion of the left second S spring 32, and the right second pad layer 200 has the main body 210 formed of the right second S spring 32 located on the rear. On the other hand, the main body portions 210 of the left and right second pad layers 200 are not disposed on the first S spring 31 at the left and right center. In other words, the main body 210 is arranged at a position shifted outward in the left-right direction with respect to the first S spring 31. In the present embodiment, in the left and right second pad layers 200, the extending portions 220 (connecting portions 230) are arranged on the rear end of the first S spring 31.

  As shown in FIG. 4, in a cross section orthogonal to the front-rear direction passing through the hip point HP, the body portion 210 of the second pad layer 200 is configured such that the lower the boundary surface 211 with the first pad layer 100 is, the lower the cushion pad 40 becomes. And has a shape recessed downward. Specifically, the boundary surface 211 is formed as an inclined surface inclined downward toward the left and right inner sides, and further has a concave curved surface shape in which the angle formed with the horizontal plane gradually decreases toward the left and right inner sides. .

  The lower surface 212 of the main body 210 of the second pad layer 200, which is the lower surface, is a plane substantially parallel to the horizontal plane. In the main body 210 of the second pad layer 200, the boundary surface 211 is an inclined surface inclined downward toward the left and right inner sides, and the lower surface 212 is a plane substantially parallel to the horizontal plane. The thickness (up and down length) of the portion on the inner side in the left-right direction relative to the first groove 43A (see the dashed line) has a substantially triangular shape that becomes thinner toward the inner side in the left-right direction.

  On the other hand, the first pad layer 100 has a portion located on the inner side in the left-right direction with respect to the left and right first grooves 43A, more specifically, a portion arranged on a portion located on the left-right inner side with respect to the first groove 43A of the main body portion 210, It becomes thinner as going outward in the left-right direction. For this reason, the central portion 41 which is a portion on the inner side in the left-right direction with respect to the first groove 43A of the cushion pad 40 has a relatively thin shape whose thickness is substantially constant in the left-right direction.

  As shown in FIG. 5, in a cross section orthogonal to the left-right direction passing through the hip point HP, the connection portion 230 of the second pad layer 200 is positioned such that the lower the boundary surface 231 with the first pad layer 100 is, the lower it is. And at the same time, have a shape that is recessed downward. More specifically, the boundary surface 231 is formed as an inclined surface that is inclined downward toward the front, and further has a concave curved surface shape in which the angle with the horizontal plane gradually decreases toward the front.

  The seat member 60 is arranged on the lower surface (back surface) of the cushion pad 40. The seat member 60 is a sheet-shaped member provided to improve the rigidity of the cushion pad 40, to prevent a cut or the like from being formed on the back surface of the cushion pad 40, and to suppress noise from a road surface. As such a sheet member 60, for example, a nonwoven fabric or a coarse blanket can be used.

Next, the operation and effect of the vehicle seat S configured as described above will be described.
As shown in FIG. 6, the seat cushion S1 of the vehicle seat S has a boundary surface between the main body portion 210 and the first pad layer 100 of the second pad layer 200 disposed below the first pad layer 100 on both left and right sides. The boundary surface 211 can conform to the shape of a human body because the inclined surface 211 is inclined downward toward the left and right inner sides and has a concave curved shape.

  When the person (the occupant P) sits on the vehicle seat S, the second pad layer 200 can support the buttocks and the thighs of the occupant P so as to sandwich the buttocks and the thighs from the left and right outer sides. Compared to the case where the second pad layer 200 is not disposed, the buttocks and the thighs of the seated person P can be firmly supported. As a result, the pressure around the ischial P1 (exactly, the place protruding to the bottom of the ischia P1; the same applies hereinafter) is relatively reduced, so that the occupant is seated around the ischia P1 and the entire buttocks and thighs. P can be supported in a well-balanced manner. This makes it difficult for the blood circulation around the ischial P1 of the occupant P to deteriorate, so that even if the occupant P sits for a long time, the occupant P can be less tired.

  Further, since each second pad layer 200 is arranged so as to straddle the corresponding first groove 43A in the left-right direction, the case where the second pad layer 200 is arranged only on the left and right inner sides of the first groove 43A is different. In comparison, the width in the left-right direction of the second pad layer 200 (the main body 210) can be secured. As a result, the boundary surface 211 between the main body 210 and the first pad layer 100 can be made to conform to the shape of the human body, in particular, the sides of the buttocks and thighs in a wide range to the left and right. When the user sits on the seat S, the buttocks and thighs of the seated person P can be more firmly supported by the second pad layer 200, and fatigue can be reduced even when sitting for a long time.

  Further, when the second pad layer is disposed only on the left and right outer sides of the first groove 43A, the second pad layer is disposed at a position away from the occupant P, so that the feeling of fatigue is reduced. Although the function of the second pad layer may not be sufficiently exhibited, the function of the second pad layer 200 can be sufficiently exhibited by disposing the second pad layer 200 so as to straddle the first groove 43A. It becomes possible. This makes it possible to reduce fatigue even when sitting for a long time.

  Further, since the left and right inner portions of the second pad layer 200 are thinner toward the inner side than the first groove 43A, it is possible to sit for a longer time compared to the case where the thickness of the second pad layer is constant. In addition, the cushion pad 40 having a function of reducing a feeling of fatigue can be made thin.

  Further, since the left and right inner portions of the first pad layer 100 are thinner toward the outside than the first groove 43A, it is possible to sit for a longer time compared to the case where the thickness of the first pad layer is constant. In addition, the cushion pad 40 having a function of reducing a feeling of fatigue can be made thin.

  In addition, since the second pad layer 200 has the extending portion 220, the rear side of the buttocks of the occupant P can be supported by the hard second pad layer 200 via the soft first pad layer 100, so that comfort is secured. Meanwhile, the seated person P can be stably supported.

  In particular, in the present embodiment, since the left and right second pad layers 200 are connected by the connecting portion 230, the entire rear part of the buttocks of the occupant P is entirely covered with the hard second pad layer 200 via the soft first pad layer 100. Since it can be supported, the seated person P can be supported more stably while securing the sitting comfort.

  In addition, since the boundary surface 231 between the connecting portion 230 and the first pad layer 100 is a concavely curved inclined surface that is inclined downward and forward, the boundary surface 231 conforms to the shape from the hip to the waist of the human body. Is formed. Thereby, when the occupant P sits on the vehicle seat S, a sudden change in hardness is not felt, so that comfortable sitting comfort can be realized.

  Also, if there is a hard second pad layer near the hip point HP, pressure is likely to be applied around the ischial P1, and the degree of reduction in fatigue may decrease. However, in the present embodiment, the hip point HP Since the second pad layer 200 is not arranged in a predetermined range around the hip pad, it is possible to more reliably lower the pressure around the ischial P1 compared to the case where the second pad layer is arranged near the hip point HP. it can. This makes it harder for the blood circulation around the ischial P1 to worsen, so that the feeling of fatigue can be further reduced even when sitting for a long time.

  Further, since the main body 210 of the second pad layer 200 is disposed on the second S spring 32, the left and right second pad layers 200 (main body 210) of the hip point HP are lowered by the left and right second S springs 32. Can be supported from. As a result, when the occupant P sits on the vehicle seat S, the second pad layer 200 can be prevented from sinking below. Thereby, the function of the second pad layer 200 can be sufficiently exhibited, so that the fatigue feeling can be further reduced even when sitting for a long time.

  In addition, since the first S spring 31 is disposed below the center of the cushion pad 40 in the left-right direction, the first pad layer 100 near the hip point HP can be supported by the first S spring 31 from below. Thereby, when the occupant P sits on the vehicle seat S, the soft first pad layer 100 can be prevented from sinking too much, so that comfortable sitting comfort can be realized.

As mentioned above, although one embodiment of the invention was described, the present invention is not limited to the embodiment. The specific configuration can be appropriately changed without departing from the spirit of the invention as described below.
For example, in the above-described embodiment, the left and right second pad layers 200 are connected by the connecting portion 230, but the invention is not limited to this. For example, as shown in FIG. 7, the left and right second pad layers 200 may have a configuration in which the extension 220 is not connected.

  In the above-described embodiment, the second pad layer 200 is not arranged before the second groove 43B, but the present invention is not limited to this. For example, as shown in FIG. 8, the left and right second pad layers 200 may be arranged before the second groove 43B. More specifically, in the embodiment shown in FIG. 8, the main body 210 of each second pad layer 200 is arranged along the first groove 43A in the front-rear direction over the range from the front end to the rear end of the cushion pad 40. ing.

  In the embodiment shown in FIG. 8, the left and right second pad layers 200 are at least partly in front of the hip point HP, specifically, the left and right portions of the body portion 210 on the front side of the second groove 43B. The width in the direction gradually narrows as it goes forward. Specifically, in the main body 210, the outer edge in the left-right direction of the portion on the front side of the second groove 43B extends substantially straight along the front-rear direction, whereas the left and right of the portion on the front side of the second groove 43B The inner edge in the direction is located outward in the left-right direction as it goes forward. According to such a configuration, the hard second pad layer 200 is disposed so as to gradually move away from the thigh of the seated person as it moves forward, so that when the seated person sits on the vehicle seat S, In addition, since there is no sudden change in hardness, a comfortable sitting comfort can be realized.

  Further, in the above-described embodiment, the second pad layer 200 has the main body 210 extending forward and backward on both left and right sides of the hip point HP, and the extending part 220 extending rearward and leftward inside the hip point HP. However, the present invention is not limited to this. For example, as shown in FIG. 9, the second pad layer 200 may have a configuration without an extension. In order to firmly support the buttocks and thighs of the seated person with the second pad layer 200 and obtain the effect of relatively lowering the pressure around the ischial P1, the second pad layer 200 is It is sufficient if they are arranged at least on both the left and right sides of the hip point HP.

  In the embodiment shown in FIG. 9, the second pad layer 200 is disposed on the second S spring 32 in the front-rear direction, but is not disposed on the first S spring 31. In other words, in the embodiment shown in FIG. 9, the left and right second pad layers 200 do not have a portion arranged on the first S spring 31.

  Further, in the above-described embodiment, the boundary surface 211 between the second pad layer 200 and the first pad layer 100 is a slope inclined downward toward the left and right inner sides, and has a concave curved surface shape. It is desirable that the shape is gradually changed according to the shape of the human body. That is, it is desirable that the boundary surfaces of the left and right second pad layers with the first pad layer follow the shape of the human body as much as possible.

  Further, in the embodiment, two first S springs 31 as the first support members are arranged at the center in the left-right direction. However, the present invention is not limited to this. For example, only one first spring 31 may be arranged. More than one may be arranged. Further, in the above-described embodiment, the second S springs 32 as the second support members are arranged one by one on the left and right sides of the first S spring 31. However, the present invention is not limited to this. Is also good. In the above-described embodiment, the S spring 30 is exemplified as the support member. However, the present invention is not limited to this. For example, a wire member other than the S spring or a plate member may be used. . Further, in the embodiment, both the first support member and the second support member are the support members (S springs 30) having the same configuration. However, the present invention is not limited to this. For example, one is a wire-like member, A support member having a different configuration may be used, such that the other is a plate-shaped member.

  In the above-described embodiment, the S spring 30 as a support member is attached to the cushion frame F1 by hooking the hooks 22A, 23A provided on the front frame 22 and the rear frame 23. The method is not particularly limited. For example, the support member may be attached by screwing, welding, or the like, or may be attached using attachment parts other than the hooks 22A and 23A.

  Further, in the above-described embodiment, the second pad layer 200 is disposed below the first pad layer 100 so as to be exposed below the cushion pad 40, but the present invention is not limited to this. For example, the second pad layer may be buried in the first pad layer so as not to be exposed below the cushion pad.

  In the above-described embodiment, the cushion pad 40 has a configuration including the two layers of the first pad layer 100 and the second pad layer 200. However, the present invention is not limited to this. For example, the first pad layer and the second pad layer A structure having one or more layers in addition to the layers may be employed. In this case, layers other than the first pad layer and the second pad layer may be arranged between the first pad layer and the second pad layer in the vertical direction.

  Further, in the above-described embodiment, the first pad layer 100 and the second pad layer 200 are each configured by a single pad material (component). However, the configuration is not limited to this, and the configuration is configured by a plurality of components. It may be. That is, at least one of the first pad layer 100 and the second pad layer 200 may be configured by assembling a plurality of components. Further, at least one of the first pad layer 100 and the second pad layer 200 may have a plurality of layers. In this case, the hardness of each layer may be the same or different.

  Further, in the above-described embodiment, the vehicle seat S mounted on the automobile is exemplified as the seat, but the seat is not limited to this. It may be. Further, the seat is not limited to a vehicle seat, and may be, for example, a seat used at home or the like.

  Further, the components described in the above-described embodiment and modified examples may be arbitrarily combined and implemented.

Reference Signs List 30 S spring 31 First S spring 32 Second S spring 40 Cushion pad 43A First groove 50 Skin material 100 First pad layer 200 Second pad layer 211 Boundary surface 220 Extension 230 Connection part 231 Boundary surface D11 First distance D12 First 2 distance D13 3rd distance HP Hip point S Vehicle seat

Claims (10)

A cushion frame having left and right side frames arranged to be separated from each other left and right, and a seat including a cushion pad and a skin material put on the cushion frame,
The cushion pad includes a first pad layer, and left and right second pad layers disposed below the first pad layer on both left and right sides of a hip point of a seated person and harder than the first pad layer. ,
In a cross section orthogonal to the front-rear direction passing through the hip point, the second pad layer is located more inward in the left-right direction of the cushion pad as the boundary surface with the first pad layer is lower, and is directed downward. Has a concave shape, and is disposed between the left and right side frames,
The left and right side frames support, from below, a portion of the first pad layer that is laterally outer than the second pad layer ,
The sheet, wherein the second pad layer is disposed between an upper end and a lower end of the side frame in a vertical direction . A cushion frame having left and right side frames arranged to be separated from each other left and right, and a seat including a cushion pad and a skin material put on the cushion frame,
The cushion pad includes a first pad layer, and left and right second pad layers disposed below the first pad layer on both left and right sides of a hip point of a seated person and harder than the first pad layer. ,
In a cross section orthogonal to the front-rear direction passing through the hip point, the second pad layer is located more inward in the left-right direction of the cushion pad as the boundary surface with the first pad layer is lower, and is directed downward. Has a concave shape, and is disposed between the left and right side frames,
The left and right side frames support, from below, a portion of the first pad layer that is laterally outer than the second pad layer,
The left and right of the second pad layer than said hip point Ri connected by connecting portions extending in the lateral located behind, it features and be Resid over preparative that front has a substantially U-shape that is open. The sheet according to claim 2 , wherein the connection portion is disposed below the first pad layer, and a boundary surface between the connection portion and the first pad layer is located further forward as it goes down. The cushion pad has left and right grooves for hanging a skin material on both left and right sides of the hip point,
4. The sheet according to claim 1, wherein the second pad layer is disposed so as to straddle the corresponding groove in the left-right direction. 5. 5. The sheet according to claim 4 , wherein a portion of the second pad layer on the inner side in the left-right direction with respect to the groove is thinner toward the inner side in the left-right direction. 6. The first pad layer sheet according to claim 4 or claim 5 than the groove lateral direction inside part, characterized in that it becomes thinner toward outward in the left-right direction. 2. The seat according to claim 1 , wherein the second pad layer has an extension extending inward in the left-right direction behind the hip point. 3.   The second pad layer has a range from the hip point to a first distance outward in the left-right direction, a range from the hip point to a second distance rearward, and a range from the hip point to a third distance forward. The sheet according to any one of claims 1 to 7, wherein is not arranged.   9. The left and right second pad layers, wherein at least a part of the width in the left-right direction before the hip point becomes narrower toward the front. The sheet according to the item. A plurality of support members extending back and forth to support the cushion pad from below,
The plurality of support members include a first support member arranged in the center in the left-right direction, and left and right second support members arranged on both left and right sides of the first support member,
The said 2nd pad layer is arrange | positioned on the said 2nd support member at the position of the said hip point in the front-back direction, and is not arrange | positioned on the said 1st support member, The said from the Claim 1 characterized by the above-mentioned. The sheet according to claim 9.

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