JP2018134345A - Seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat which can reduce fatigue feeling even when sitting for a long time.SOLUTION: The seat comprises a cushion pad 40, the cushion pad 40 having a first pad layer 100, right and left second pad layers 200 which are arranged under the first pad layer 100 on both right and left sides of a hip point HP of a seated person and which are harder than the first pad layer 100. In the cross section orthogonal to the front-to-rear direction passing through the hip point HP, the second pad layer 200 has a boundary surface 211 with respect to the first pad layer 100 positioned on the inner side in the right-left direction of the cushion pad 40 as going downward and has a shape which is recessed downward.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a seat provided with a cushion pad.

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

JP-A-63-172614

  By the way, it is desirable that the seat does not feel tired even when sitting for a long time, but this point has not been considered in the prior art.

Then, an object of this invention is to provide the sheet | seat which can reduce a feeling of fatigue even if it sits for a long time.
Moreover, an object of this invention is to make a cushion pad thin.
Another object of the present invention is to stably support a seated person while ensuring sitting comfort.
Another object of the present invention is to realize a comfortable sitting comfort.

  In order to achieve the above-described object, the seat of the present invention is a seat including a cushion pad, and the cushion pad is below the first pad layer on both the left and right sides of the hip point of the seated person. The left and right second pad layers that are harder than the first pad layer, and in the cross-section orthogonal to the front-rear direction passing through the hip point, the second pad layer includes: The boundary surface 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 on the inner side in the left-right direction as it goes down, and has a shape that is recessed downward, so that the second pad The boundary surface of the layer can follow the shape of the human body. When a person sits on the seat, the second pad layer can support the side of the occupant's buttocks and thighs, so that the pressure around the sciatica is relatively lowered, and the sciatic area and the buttocks The seated person can be supported in a well-balanced manner by the entire thigh. As a result, blood circulation around the sciatic bone of the seated person is unlikely to deteriorate, 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 suspending the skin material on both left and right sides of the hip point, and the second pad layer straddles the corresponding groove in the left-right direction. It can be set as the structure arrange | positioned.

  According to this, compared with the case where the second pad layer is disposed only in the left and right direction inside of the groove, the width of the second pad layer in the left and right direction can be secured, so that the boundary surface of the second pad layer is the human body, In particular, the shape of the side part of the buttocks and thighs can be adjusted in a wide range from side to side. As a result, when a person sits on the seat, the side of the buttocks and thighs of the seated person can be firmly supported by the second pad layer, so that a feeling of fatigue can be reduced even when sitting for a long time. . In addition, when the second pad layer is disposed only on the outer side in the left-right direction of the groove, the second pad layer may be disposed at a position away from the seated person and may not fully perform the function of the second pad layer. 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 fully exerted, so that the feeling of fatigue is reduced even when sitting for a long time. be able to.

  In the sheet described above, 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 becomes thinner toward the inner side in the left-right direction.

  According to this, compared with the case where the thickness of the 2nd pad layer is constant, a cushion pad can be made thin.

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

  According to this, compared with the case where the thickness of the 1st pad layer is constant, a cushion pad can be made thin.

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

  According to this, since the rear side part of the buttocks of the seated person can be supported by the hard second pad layer through the soft first pad layer, the seated person can be stably supported while ensuring the sitting comfort. .

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

  According to this, since 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, the seated person can be stably supported while ensuring the sitting comfort.

  In the sheet described above, the connecting portion may be disposed below the first pad layer, and a boundary surface with the first pad layer may be positioned forward as it goes down.

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

  In the above-described seat, the second pad layer has a third distance range from the hip point to the first distance outward in the left-right direction, a range from the hip point to the second distance backward, and the hip point to the front. It can be set as the structure which is not arrange | positioned in the range to a distance.

  According to this, if there is a hard second pad layer in the vicinity of the hip point, pressure is likely to be applied around the sciatic bone, which may reduce the degree of fatigue reduction. Since the is not disposed, the pressure around the sciatica can be lowered. As a result, blood circulation around the sciatic bone of the seated person is less likely to deteriorate, so that a feeling of fatigue can be reduced even when sitting for a long time.

  In the above-described seat, the left and right second pad layers may be configured such that at least a part of the width in the left-right direction before the hip point becomes narrower toward the front.

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

  The above-described seat includes a plurality of support members that extend in the front-rear direction and support the cushion pad from below, and the plurality of support members include a first support member that is 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, and 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 the first support It can be set as the structure which is not arrange | positioned on the member.

  According to this, since the left and right second pad layers of the hip point can be supported from below by the left and right second support members, the second pad layer can sink 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 a feeling of fatigue can be reduced even when sitting for a long time. Further, since the first pad layer near the hip point can be supported from below by the first support member, it is possible to suppress the soft first pad layer from sinking too much when a person sits on the seat, A comfortable sitting comfort can be realized.

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

  Further, according to the present invention, the second pad layer is disposed so as to straddle the cushion pad groove in the left-right direction, so that a feeling of fatigue can be reduced even when sitting for a long time.

  Moreover, according to this invention, a cushion pad can be made thin by making the part inside the left-right direction rather than the groove | channel of a 2nd pad layer so thin that it goes to the left-right direction inner side.

  In addition, according to the present invention, the cushion pad can be thinned by making the portion on the inner side in the left-right direction from the groove of the first pad layer thinner toward the outer side in the left-right direction.

  Moreover, according to this invention, a seated person can be supported stably, ensuring sitting comfort by providing an extension part back rather than the hip point of a 2nd pad layer.

  Moreover, according to this invention, a seated person can be supported stably, ensuring seating comfort by connecting the 2nd pad layer on either side with the connection part of back rather than a hip point.

  In addition, according to the present invention, a comfortable sitting comfort is realized by adopting a configuration in which the interface with the first pad layer of the connecting portion disposed below the first pad layer is positioned forward as it goes down. can do.

  Moreover, according to this invention, a feeling of fatigue can be decreased even if it sits for a long time by not arrange | positioning a 2nd pad layer to hip point vicinity.

  Further, according to the present invention, it is possible to realize a comfortable sitting comfort by narrowing at least a part of the width in the left-right direction ahead of the hip points of the left and right second pad layers.

  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 not disposed on the first support member, so that even when sitting for a long time. A feeling of fatigue can be reduced, and a comfortable sitting comfort can be realized.

It is a perspective view of the vehicle seat as a seat concerning 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 which concerns on embodiment from the top. FIG. 4 is a cross-sectional view of a seat cushion corresponding to the IV-IV cross section of FIG. 3. FIG. 5 is a cross-sectional view of a seat cushion corresponding to the VV cross section of FIG. 3. It is sectional drawing of a seat cushion in the state where the person sat down. It is the figure which looked at the cushion pad which concerns on a 1st modification from the top. It is the figure which looked at the cushion pad which concerns on a 2nd modification from the top. It is the figure which looked at the cushion pad which concerns on a 3rd modification from the top.

Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings. In this specification, front and rear, left and right, and top and bottom are based on front and rear, left and right, and top and bottom as viewed from a person sitting on the seat (sitting person).
As shown in FIG. 1, the seat of this embodiment is comprised as the vehicle seat S mounted in a motor vehicle, and is provided with the seat cushion S1, the seat back S2, and the headrest S3.

  A seat frame F as shown in FIG. 2 is built in the vehicle seat S. The seat frame F includes a cushion frame F1 that forms the skeleton of the seat cushion S1, a back frame F2 that forms the skeleton of the seat back S2, and a headrest frame (not shown) that forms the skeleton of the headrest S3. The vehicle seat S is configured by covering the seat frame F with a pad material made of urethane foam or the like and a skin material made of fabric or leather.

  The cushion frame F <b> 1 is separated from the left and right, and extends in the front-rear direction, the left and right side frames 21, the front frame 22 that connects the front ends of the left and right side frames 21, and the rear ends of the left and right side frames 21. And a rear frame 23 connecting the two.

Each side frame 21 includes a side wall portion 21A facing in the left-right direction, an upper flange 21B extending from the upper end of the side wall portion 21A to the left and right inner sides, and a lower flange 21C extending from the lower end of the side wall portion 21A to the left and right inner sides. ing.
The front frame 22 is a so-called pan frame made of a metal plate. The front frame 22 is provided with four hooks 22 </ b> A arranged on the upper surface so as to be separated from each other on the left and right sides by cutting up a sheet metal constituting 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 at a distance from each other.

  Four S springs 30 as an example of a plurality of support members are installed on the front frame 22 and the rear frame 23 in the cushion frame F1. Each S spring 30 is an elastically deformable member extending in the front-rear direction while being alternately bent in the left-right direction, and supports a cushion pad 40 described later from below (see FIG. 4). The four S springs 30 are arranged side by side 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 1st S spring 31 is arranged so that it may pass just under the seated person's sciatic bone.

  A total of two second S springs 32 are arranged 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 spaced apart from each other on the left and right, and the two first S springs 31 are disposed therebetween. The second S spring 32 is disposed on the outer side of the left and right as a whole with respect to the portion of the sciatic bone of the seated person that protrudes in the lowest direction. Specifically, the second S spring 32 is disposed at the left and right outer sides of the portion of the center position in the left-right direction that protrudes to the lowermost side of the seated person's ischi. 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 respectively hooked on hooks 22A provided on the front frame 22, and the rear ends of the first S spring 31 and the second S spring 32 are provided on the rear frame 23, respectively. It is hooked on the 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 and a skin material 50 as shown in FIGS.
The cushion pad 40 includes a central portion 41 and left and right side portions 42 provided on both the left and right sides of the central portion 41 and projecting upward from the central portion 41. Further, the cushion pad 40 has a hanging groove 43 for hanging the skin material 50.

The suspension groove 43 includes left and right first grooves 43A extending in the front-rear direction, and second and third grooves 43B and 43C extending in the left-right direction.
The left and right first grooves 43A are an example of grooves, and are formed so as to extend along the boundaries between the central portion 41 and the side portions 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 a 3D mannequin based on SAE J-826 is seated on a seat.
The second groove 43B is formed on the front side of the hip point HP so as to connect the vicinity of the center part in the front-rear direction of the left and right first grooves 43A.
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 in the bottom of the suspension groove 43. The skin material 50 is fastened to the cushion pad 40 by engaging the hook member 55 with the exposed portion of the hanging wire 44.

In the present embodiment, the cushion pad 40 includes 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 portion that forms a lower layer of the cushion pad 40, and is disposed under the first pad layer 100. As shown in FIG. 3, the left and right second pad layers 200 each have a main body portion 210 extending in the front-rear direction and an extending portion 220 extending inward in the left-right direction from the rear end portion of the main body portion 210. . The extending portions 220 of the left and right second pad layers 200 are connected to each other and constitute 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 in the left and right direction. In the present embodiment, in the left and right second pad layers 200, both the main body portion 210 and the extending portion 220 (connecting portion 230) are disposed 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 from the left and right at the left and right positions of the hip point HP of the seated person. Each of the second pad layers 200 is disposed 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.

  Each of the second pad layers 200 is disposed such that the main body 210 straddles the corresponding first groove 43A in the left-right direction. Specifically, the main body portion 210 of the left second pad layer 200 is disposed so as to straddle the left first groove 43A, and the main body portion 210 of the right second pad layer 200 is disposed on the right first groove 43A. It is arranged to straddle. Specifically, each main body 210 has a predetermined width in the left-right direction, and is disposed below the corresponding first groove 43A. And each main-body part 210 is arrange | positioned in the left-right outer side rather than the 1st groove | channel 43A to which the left-right outer edge respond | corresponds, and the left-right inner edge is arrange | positioned in the left-right inner side from the corresponding 1st groove | channel 43A.

  In the left and right second pad layers 200, the extending portions 220 (connecting portions 230) are located behind the hip point HP. Specifically, each extending portion 220 (connecting portion 230) is disposed on the rear side of the third groove 43C.

  The second pad layer 200 is a range from the hip point HP to the first distance D11, the range from the hip point HP to the second distance D12, and the front from the hip point HP when viewed from the vertical direction. It is not arranged in the range up to the third distance D13. That is, the second pad layer 200 is not disposed in a predetermined range around the hip point HP when viewed from the top and bottom directions. In the present embodiment, the second pad layer 200 is not disposed before the second groove 43B.

  Further, when viewed from the vertical direction, the second pad layer 200 is disposed on the second S spring 32 and not 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 a body portion 210 disposed on the rear portion of the left second S spring 32, and the right second pad layer 200 has a body portion 210 having a right second S spring. 32 is arranged on the rear part. On the other hand, the main body portion 210 of the left and right second pad layers 200 is not disposed on the first S spring 31 at the center of the left and right. In other words, the main body portion 210 is disposed at a position shifted outward in the left-right direction with respect to the first S spring 31. In the present embodiment, each of the left and right second pad layers 200 has each extending portion 220 (connecting portion 230) disposed on the rear end portion of the first S spring 31.

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

  In the main body 210 of the second pad layer 200, the lower surface 212 which is the lower surface is a plane substantially parallel to the horizontal plane. The main body portion 210 of the second pad layer 200 has an inclined surface in which the boundary surface 211 is 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 (vertical length) of the portion on the inner side in the left-right direction with respect to the first groove 43A (see the alternate long and short dash 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 disposed on the inner side in the left-right direction with respect to the left and right first grooves 43A, specifically, a portion disposed on a portion on the inner side in the left-right direction with respect to the first groove 43A of the main body 210. The thinner it goes to the outside in the left-right direction. For this reason, the central portion 41, which is the 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 the cross section orthogonal to the left-right direction passing through the hip point HP, the connecting portion 230 of the second pad layer 200 is positioned forward as the boundary surface 231 with the first pad layer 100 goes downward. In addition, the shape is recessed downward. 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 such that an angle with the horizontal plane gradually decreases toward the front.

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

Next, the effect of the vehicle seat S configured as described above will be described.
As shown in FIG. 6, the seat cushion S <b> 1 of the vehicle seat S is 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 the left and right sides. Since 211 is an inclined surface that inclines downward toward the left and right inner sides and has a concave curved surface shape, the boundary surface 211 can be adapted to the shape of the human body.

  And when a person (sitting person P) sits down on the vehicle seat S, the second pad layer 200 can support the side of the buttocks and thighs of the sitting person P from the left and right outsides, Compared to the case where the second pad layer 200 is not disposed, the side of the buttocks and thighs of the seated person P can be firmly supported. As a result, the pressure around the sciatic bone P1 (exactly where it protrudes to the bottom of the sciatic bone P1; the same applies hereinafter) is relatively reduced, so that the seated person can sit around the sciatic bone P1 and the entire buttocks and thighs. P can be supported in a well-balanced manner. As a result, blood circulation around the sciatic bone P1 of the seated person P is unlikely to deteriorate, so that the fatigue of the seated person P can be reduced even when sitting for a long time.

  Moreover, since each 2nd pad layer 200 is arrange | positioned so that the corresponding 1st groove | channel 43A may be straddled in the left-right direction, the case where the 2nd pad layer 200 is arrange | positioned only in the left-right inner side of the 1st groove | channel 43A, In comparison, the width in the left-right direction of the second pad layer 200 (main body part 210) can be ensured. As a result, the boundary surface 211 between the main body portion 210 and the first pad layer 100 can be made to conform to the shape of the human body, in particular, the side portions of the buttocks and thighs, in a wide range from side to side. When the user sits on the seat S, the second pad layer 200 can more firmly support the buttocks and thighs of the seated person P, and the fatigue can be reduced even when sitting for a long time.

  In addition, 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 seat occupant P, thereby reducing fatigue. 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 arranging the second pad layer 200 so as to straddle the first groove 43A. It becomes possible. Thereby, even if it sits for a long time, a feeling of fatigue can be decreased more.

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

  In addition, since the left and right inner portions of the first pad layer 100 are thinner toward the outer side than the first groove 43A, the first pad layer 100 sits for a long time compared to the case where the thickness of the first pad layer is constant. Further, the cushion pad 40 having a function of less feeling of fatigue can be made thinner.

  Moreover, since the 2nd pad layer 200 has the extension part 220, since the back side part of the buttocks of the seated person P can be supported by the hard 2nd pad layer 200 via the soft 1st pad layer 100, a seating comfort is ensured. However, the seated person P can be supported stably.

  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 portion of the buttocks of the seated person P is made of the hard second pad layer 200 via the soft first pad layer 100. Since it can support, the seated person P can be supported more stably, ensuring a seating comfort.

  Further, since the boundary surface 231 between the connecting portion 230 and the first pad layer 100 is a concave curved inclined surface that is inclined downward toward the front, the shape along the shape from the buttocks of the human body to the waist by the boundary surface 231. Will be formed. As a result, when the seated person P sits on the vehicle seat S, a sudden change in hardness is not felt, so that a comfortable sitting comfort can be realized.

  Further, if there is a hard second pad layer in the vicinity of the hip point HP, pressure may easily be applied to the periphery of the sciatic bone P1, and the degree of reduction in fatigue may be reduced. In this embodiment, the hip point HP is reduced. Since the second pad layer 200 is not disposed in the predetermined range around the periphery, the pressure around the sciatic bone P1 can be more reliably lowered as compared with the case where the second pad layer is disposed near the hip point HP. it can. As a result, the blood circulation around the sciatic bone P1 is less likely to deteriorate, so that the feeling of fatigue can be 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, the second pad layer 200 can be prevented from sinking downward when the seated person P sits on the vehicle seat S. As a result, the function of the second pad layer 200 can be sufficiently exerted, so that a feeling of fatigue can be reduced even when sitting for a long time.

  Further, 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 from below by the first S spring 31. Thereby, when the seated person P sits on the vehicle seat S, it is possible to suppress the soft first pad layer 100 from sinking too much, so that a comfortable sitting comfort can be realized.

As mentioned above, although one Embodiment of invention was described, this invention is not limited to the said embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of invention as follows.
For example, in the embodiment, the left and right second pad layers 200 are connected by the connecting portion 230, but the present invention is not limited to this. For example, as illustrated in FIG. 7, the left and right second pad layers 200 may have a configuration in which the extension part 220 is not connected.

  In the embodiment, the second pad layer 200 is not disposed before the second groove 43B. However, 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 disposed before the second groove 43B. Specifically, in the form shown in FIG. 8, the main body portion 210 of each second pad layer 200 is disposed along the first groove 43 </ b> A over the range from the front end portion to the rear end portion of the cushion pad 40 in the front-rear direction. ing.

  In the form 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 parts of the main body 210 in front of the second groove 43B. The width of the direction gradually becomes narrower toward the front. Specifically, in the main body 210, the left and right outer edges of the front part of the second groove 43B extend substantially straight along the front-rear direction, whereas the left and right parts of the front part of the second groove 43B. The inner edge in the direction is located on the outer side in the left-right direction as it goes forward. According to such a configuration, since the hard second pad layer 200 is arranged so as to gradually move away from the thigh of the seated person as it goes forward, 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.

  Moreover, in the said embodiment, the 2nd pad layer 200 had the main-body part 210 extended to the front and back in the left-right both sides of the hip point HP, and the extension part 220 extended in the left-right inner side back from the hip point HP. However, it is not limited to this. For example, as shown in FIG. 9, the second pad layer 200 may be configured not to include an extension portion. In order to firmly support the side of the occupant's buttocks and thighs by the second pad layer 200 and to obtain the effect of relatively reducing the pressure around the sciatic bone P1, the second pad layer 200 is: It is sufficient that it is arranged at least on both the left and right sides of the hip point HP.

  In the form 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 form shown in FIG. 9, the left and right second pad layers 200 do not have a portion disposed on the first S spring 31.

  In the embodiment, the boundary surface 211 between the second pad layer 200 and the first pad layer 100 is an inclined surface that is 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 along with the shape of the human body. That is, it is desirable that the boundary surface between the left and right second pad layers with the first pad layer is as close as possible to the shape of the human body.

  Moreover, in the said embodiment, although the 1st S spring 31 as a 1st support member was arrange | positioned in the center of the left-right direction, it is not limited to this, For example, only one may be arrange | positioned. Two or more may be arranged. Moreover, in the said embodiment, although the 2nd S spring 32 as a 2nd support member was arrange | positioned 1 each on the right and left sides of the 1st S spring 31, it is not limited to this, and it has arrange | positioned two or more on both the left and right sides, respectively. 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-like member other than the S spring or a plate-like member may be used. . Moreover, in the said embodiment, although both the 1st support member and the 2nd support member were the support members (S spring 30) of the same structure, it is not limited to this, For example, one is a wire-shaped member, Support members having different configurations may be used such that the other is a plate-like member.

  In the above embodiment, the S spring 30 as the support member is attached to the cushion frame F1 by being hooked to the hooks 22A and 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 or welding, or may be attached using attachment parts other than the hooks 22A and 23A.

  Moreover, in the said embodiment, although the 2nd pad layer 200 was arrange | positioned under the 1st pad layer 100 so that it might be exposed under the cushion pad 40, it is not limited to this. For example, the second pad layer may be arranged in a state of being embedded in the first pad layer so as not to be exposed to the lower side of the cushion pad.

  Moreover, in the said embodiment, although the cushion pad 40 was the structure which has two layers, the 1st pad layer 100 and the 2nd pad layer 200, it is not limited to this, For example, a 1st pad layer and a 2nd pad The structure which has one or more layers other than a layer may be sufficient. In this case, layers other than the first pad layer and the second pad layer may be disposed between the first pad layer and the second pad layer in the vertical direction.

  In the embodiment, the first pad layer 100 and the second pad layer 200 are each composed of a single pad material (component). However, the present invention is not limited to this, and each is composed of 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.

  Moreover, in the said embodiment, although the vehicle seat S mounted in a motor vehicle was illustrated as a sheet | seat, it is not limited to this, The vehicle seat mounted in vehicles other than a motor vehicle, for example, a rail vehicle, a ship, an aircraft, etc. It may be. The seat is not limited to a vehicle seat, and may be a seat used at home, for example.

  Moreover, you may implement combining each element demonstrated by above-described embodiment and modification arbitrarily.

30 S spring 31 1st S spring 32 2nd S spring 40 cushion pad 43A 1st groove 50 skin material 100 1st pad layer 200 2nd pad layer 211 boundary surface 220 extension part 230 connection part 231 boundary surface D11 1st distance D12 1st 2 distance D13 3rd distance HP Hip point S Vehicle seat

Claims (10)

A seat with a cushion pad,
The cushion pad includes a first pad layer, and left and right second pad layers harder than the first pad layer and disposed below the first pad layer on both left and right sides of a hip point of the seated person. ,
In a cross-section orthogonal to the front-rear direction passing through the hip point, the second pad layer is located on the inner side in the left-right direction of the cushion pad as it goes down and toward the lower side. A sheet characterized by a concave shape. The cushion pad has left and right grooves for hanging a skin material on both left and right sides of the hip point,
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.   The sheet according to claim 2, wherein the second pad layer is such that a portion on the inner side in the left-right direction with respect to the groove becomes thinner toward the inner side in the left-right direction.   4. The sheet according to claim 2, wherein the first pad layer is thinner in a portion on the inner side in the left-right direction than the groove toward the outer side in the left-right direction.   The seat according to any one of claims 1 to 4, wherein the second pad layer has an extending portion extending inward in the left-right direction behind the hip point.   The seat according to any one of claims 1 to 5, wherein the second pad layers on the left and right are connected by a connecting portion that extends to the left and right behind the hip point.   The sheet according to claim 6, wherein the connecting portion is disposed below the first pad layer, and a boundary surface with the first pad layer is positioned forward as it goes down.   The second pad layer is within a range from the hip point to the first distance in the left-right direction, a range from the hip point to the second distance backward, and a range from the hip point to the third distance forward. The sheet according to claim 1, wherein the sheet is not disposed.   The left and right second pad layers have at least a part of the width in the left-right direction in front of the hip point narrowing toward the front. The sheet according to 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 disposed in the center in the left-right direction, and left and right second support members disposed on both the left and right sides of the first support member,
The said 2nd pad layer is arrange | positioned on the said 2nd supporting member at the position of the said hip point in the front-back direction at least, It is not arrange | positioned on the said 1st supporting member. The sheet according to any one of claims 9 to 9.

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