JP2022044704A - Seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat enabling a user to barely feel tired even when sitting thereon for a long period of time.

SOLUTION: A seat comprises a cushion pad 40 with which a cushion frame having a right and left side frames 21 is covered. The cushion pad 40 includes: a first pad layer 100; and a second pad layer 200 disposed under the first pad layer 100 on both right and left sides of a hip point HP of a seated person, the second pad layer being harder than the first pad layer 100. The second pad layer 200 has a boundary surface 211 with the first pad layer 100, the boundary surface positioned more internally on the right and left sides as it goes downward and having a shape depressed downward, and is disposed between the right and left side frames 21. The side frames 21 support the first pad layer 100's parts on the right and left outsides of the second pad layer 200 from below. On both right and left sides of the hip point HP, the cushion pad 40 has grooves 43 for hanging in a skin material 50. The second pad layer 200's vertical position overlaps with the grooves 43.

SELECTED DRAWING: Figure 4

COPYRIGHT: (C)2022,JPO&INPIT

Description

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

Conventionally, cushion pads made of foam materials having different hardness have been 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 of the side portions such as an outer region of the side portion. A seat cushion is disclosed in which the left and right portions including the portion are made of a hard foam material and the inner portion thereof is made of a soft foam material.

Japanese Unexamined Patent Publication No. 63-172614

By the way, it is desirable that the seat does not cause fatigue even when sitting for a long time, but this point has not been taken into consideration in the prior art.

Therefore, an object of the present invention is to provide a seat that can reduce fatigue even when sitting for a long time.
The purpose is to make the cushion pad thinner.
In addition, the purpose is to stably support the seated person while ensuring a comfortable seating.
In addition, the purpose is to realize a comfortable sitting comfort.

The seat for achieving the above-mentioned object is a seat provided with a cushion pad, and the cushion pad is arranged under the first pad layer and the left and right sides of the hip point of the occupant under the first pad layer. Further, in a cross section having left and right second pad layers harder than the first pad layer and orthogonal to the front-rear direction passing through the hip point, the second pad layer is a boundary surface with the first pad layer. However, it is characterized in that it is located inside the cushion pad in the left-right direction toward the bottom and has a shape of being recessed downward.

According to such a configuration, the boundary surface between the second pad layer and the first pad layer is located inward in the left-right direction as it goes down, and has a shape that is recessed downward, so that the second pad is formed. The boundary surface of the layer can be made to follow the shape of the human body. Then, when a person sits on the seat, the second pad layer can support the buttocks and the sides of the thighs of the seated person, so that the pressure around the ischium is relatively reduced, and the pressure around the ischia and the buttocks and the large The entire thigh can support the seated person in a well-balanced manner. As a result, blood circulation around the ischium of the seated person is less likely to deteriorate, so that the feeling of fatigue can be reduced even when sitting for a long time.

In the above-mentioned sheet, the cushion pad has left and right grooves for suspending the skin material on both the 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 configured to be located in.

According to this, as compared with the case where the second pad layer is arranged only on the inner side in the left-right direction of the groove, the width in the left-right direction of the second pad layer can be secured. In particular, it can follow the shape of the side of the buttocks and thighs in a wide range to the left and right. As a result, when a person sits on the seat, the second pad layer can firmly support the buttocks and the sides of the thighs of the seated person, so that the feeling of fatigue can be further reduced even if the person sits 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 away from the seated person and the function of the second pad layer may not be fully 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 fully exerted, so that the feeling of fatigue is further reduced even when sitting for a long time. be able to.

In the above-mentioned sheet, the second pad layer may be configured such that the portion inside the groove in the left-right direction becomes thinner toward the inside in the left-right direction.

According to this, the cushion pad can be made thinner as compared with the case where the thickness of the second pad layer is constant.

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

According to this, the cushion pad can be made thinner as compared with the case where the thickness of the first pad layer is constant.

In the above-mentioned sheet, the second pad layer can be configured to have an extending portion extending inward in the left-right direction behind the hip point.

According to this, since the posterior portion 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 above-mentioned sheet, 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 entire rear portion 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 above-mentioned sheet, the connecting portion may be arranged below the first pad layer, and the boundary surface with the first pad layer may be positioned in front as it goes down.

According to this, the boundary surface of the connecting portion with the first pad layer forms a shape along the shape from the buttocks to the waist of the human body, so that when a person sits on the seat, he / she feels a sudden change in hardness. Since there is no such thing, it is possible to realize a comfortable sitting comfort.

In the above-mentioned sheet, the second pad layer is a range from the hip point to the outside in the left-right direction up to a first distance, a range from the hip point to a second distance backward, and a third from the hip point to the front. The configuration may not be arranged within the range up to the distance.

According to this, if there is a hard second pad layer near the hip point, pressure is likely to be applied around the ischium and the degree of reduction of fatigue may decrease, but the second pad layer near the hip point. By not arranging, the pressure around the ischium can be reduced. As a result, the blood circulation around the ischium of the seated person is less likely to deteriorate, so that the feeling of fatigue can be further reduced even when sitting for a long time.

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

According to this, the hard second pad layer is arranged so as to gradually move away from the thigh of the seated person as it goes forward, so that when a person sits on the seat, he / she feels a sudden change in hardness. Since there is no such thing, it is possible to realize a comfortable sitting comfort.

The above-mentioned seat includes a plurality of support members extending back and forth to support the cushion pad from below, and the plurality of support members include a first support member arranged in the center in the left-right direction and the first support member. The second pad layer is arranged on the second support member at least at the position of the hip point in the front-rear direction, and includes the left and right second support members arranged on the left and right sides of the first support member. It can be configured not to be placed on the member.

According to this, the left and right second pad layers of the hip point can be supported from below by the left and right second support members, so that when a person sits on the seat, the second pad layer sinks down. It can be suppressed. As a result, the function of the second pad layer can be fully exerted, so that the feeling of fatigue can be further 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 prevent the soft first pad layer from sinking too much when a person sits on the seat. It is possible to realize a comfortable sitting comfort.

According to the present invention, it is possible to reduce the feeling of fatigue even when sitting for a long time.

Further, 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, the cushion pad can be made thinner by making the portion inside the second pad layer in the left-right direction inward toward the inside in the left-right direction.

Further, the cushion pad can be made thinner by making the portion inside the first pad layer in the left-right direction toward the outside in the left-right direction.

Further, by providing the extending portion behind the hip point of the second pad layer, it is possible to stably support the seated person while ensuring a comfortable seating.

Further, by connecting the left and right second pad layers at the connecting portion behind the hip point, it is possible to stably support the seated person while ensuring a comfortable seating.

Further, by configuring the connecting portion arranged under the first pad layer so as to be positioned in front of the boundary surface with the first pad layer toward the lower side, a comfortable sitting comfort can be realized.

Further, by not arranging the second pad layer near the hip point, it is possible to reduce the feeling of fatigue even when sitting for a long time.

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

Further, by arranging the second pad layer on the second support member at least at the position of the hip point in the front-rear direction and not on the first support member, the feeling of fatigue is further reduced even when sitting for a long time. At the same time, it is possible to realize a comfortable sitting comfort.

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

Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings. In this specification, front / rear, left / right, and up / down are referred to as front / back, left / right, and up / down as seen from a person sitting on the seat (seated person).
As shown in FIG. 1, the seat of 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.

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 constituting the skeleton of the seat cushion S1, a back frame F2 constituting the skeleton of the seat back S2, and a headrest frame (not shown) constituting the skeleton of the headrest S3. The vehicle seat S is composed of a seat frame F covered with a pad material made of urethane foam or the like and a skin material made of cloth or leather.

The cushion frame F1 is arranged so as to be separated from each other to the left and right, the left and right side frames 21 extending in the front-rear direction, the front frame 22 connecting the front ends of the left and right side frames 21, and the rear ends of the left and right side frames 21. It is equipped with a rear frame 23 that connects them to each other.

Each side frame 21 includes a side wall portion 21A facing in the left-right direction, an upper flange 21B extending inward from the upper end of the side wall portion 21A, and a lower flange 21C extending inward from the lower end of the side wall portion 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 22A arranged side by side on the upper surface so as to be separated from each other on the left and right sides by cutting up the sheet metal constituting the front frame 22.
The rear frame 23 is a frame made of pipes. The rear frame 23 is provided with four hooks 23A arranged side by side so as to be separated from each other on the left and right sides.

In the cushion frame F1, four S springs 30 as an example of a plurality of support members are erected 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 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 the first support member and a second S spring 32 as an example of the second support member.

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

Two second S springs 32 are arranged inside the cushion frame F1, one on each of the left and right sides of the first S spring 31, for a total of two. In other words, the left and right second S springs 32 are arranged apart from each other on the left and right, and two first S springs 31 are arranged between them. The second S spring 32 is generally arranged on the left and right lateral sides of the seated person's ischial bone, which protrudes to the lowermost position. Specifically, the second S spring 32 is arranged so that the center position in the left-right direction is on the left-right outer side of the portion of the seated person's ischium that protrudes to the lowermost position. 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 to the 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. It is hooked on the hook 23A. As a result, the first S spring 31 and the second S spring 32 are provided so as to bridge 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 the left and right sides of the central portion 41 and projecting above 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 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 the present 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 vicinity of the central portion 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.

In the cushion pad 40, a suspension wire 44 for suspending the skin material 50 into the suspension groove 43 is embedded 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 suspension wire 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 portion forming a lower layer of the cushion pad 40, and is arranged below 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, respectively. .. The extending portions 220 of the left and right second pad layers 200 are connected to each other and integrated to form the connecting portion 230. Therefore, the left and right second pad layers 200 have a substantially U-shape connected by connecting portions 230 extending to the left and right. 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 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.

In the left and right second pad layers 200, the main body 210 is arranged at positions on both the left and right sides of the seated person's hip point HP so as to be separated from each other on the left and right. In each second pad layer 200, the main body 210 is arranged so as to extend from the vicinity of the second groove 43B to the vicinity of the rear end portion of the first groove 43A in the front-rear direction.

Further, in each second pad layer 200, the main body portion 210 is arranged 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 arranged 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 straddles the first groove 43A on the right. It is arranged so as 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. The left and right outer edges of the main body 210 are arranged on the left and right outer sides of the corresponding first groove 43A, and the left and right inner edges are arranged on the left and right inner sides of the corresponding first groove 43A.

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

The second pad layer 200 has a range from the hip point HP to the outside in the left-right direction up to the first distance D11, a range from the hip point HP to the rear to the second distance D12, and a range from the hip point HP to the front 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 arranged in a predetermined range around the hip point HP when viewed from the vertical direction. In this embodiment, the second pad layer 200 is not arranged before the second groove 43B.

Further, when viewed from the vertical direction, the second pad layer 200 is arranged on the second S spring 32 at the position of the hip point HP in the front-rear direction, and is not arranged on the first S spring 31. Specifically, in the left second pad layer 200, the main body 210 is arranged on the rear portion of the left second S spring 32, and in the right second pad layer 200, the main body 210 is the right second S spring. It is located above the rear of the 32. On the other hand, the main body 210 of the left and right second pad layers 200 is not arranged on the first S spring 31 in the center of the left and right. 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, each extending portion 220 (connecting portion 230) is arranged on the rear end portion 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 main body 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 inside in the left-right direction of, and has a shape that dents downward. Specifically, the boundary surface 211 is formed as an inclined surface that inclines downward toward the left and right inward, and further has a concave curved surface shape such that the angle formed with the horizontal plane gradually decreases toward the left and right inward. ..

Further, 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 210 of the second pad layer 200 is an inclined surface in which the boundary surface 211 is inclined downward toward the left and right inward, and the lower surface 212 is a plane substantially parallel to the horizontal plane, so that the left and right sides are particularly left and right. The thickness (vertical length) of the portion inside the first groove 43A (see the one-point chain line) in the left-right direction is substantially triangular, which becomes thinner toward the inside in the left-right direction.

On the other hand, in the first pad layer 100, a portion arranged on the inner portion in the left-right direction from the left and right first grooves 43A, specifically, a portion arranged on the inner portion in the left-right direction than the first groove 43A of the main body portion 210. It becomes thinner toward the outside in the left-right direction. Therefore, the central portion 41, which is a portion inside the first groove 43A of the cushion pad 40 in the left-right direction, has a relatively thin shape in which the thickness thereof 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 connecting portion 230 of the second pad layer 200 is positioned in front of the boundary surface 231 with the first pad layer 100 as it goes down. At the same time, it has a shape that dents downward. Specifically, the boundary surface 231 is formed as an inclined surface that inclines downward toward the front, and further has a concave curved surface shape such that the angle formed with the horizontal plane gradually decreases toward the front.

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

Next, the action 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 is a boundary surface between the main body 210 and the first pad layer 100 of the second pad layer 200 arranged under the first pad layer 100 on both the left and right sides. Since the 211 is an inclined surface that inclines downward toward the left and right inward and has a concave curved surface shape, the boundary surface 211 can follow the shape of the human body.

Then, when a person (seat P) sits on the vehicle seat S, the second pad layer 200 can support the buttock and thigh sides of the seat P so as to sandwich them from the left and right outside. Compared with the case where the second pad layer 200 is not arranged, the side portions of the buttocks and thighs of the seated person P can be firmly supported. As a result, the pressure around the ischium P1 (to be exact, the portion protruding to the bottom of the ischium P1; the same applies hereinafter) is relatively reduced, so that the seated person is located around the ischium P1 and the entire buttocks and thighs. P can be supported in a well-balanced manner. As a result, the blood circulation around the ischium P1 of the seated person P is less likely to deteriorate, so that the tiredness of the seated person P can be reduced even if the seated person P sits for a long time.

Further, since each second pad layer 200 is arranged so as to straddle the corresponding first groove 43A in the left-right direction, the second pad layer 200 may be arranged only on the left and right inside of the first groove 43A. In comparison, the width of the second pad layer 200 (main body 210) in the left-right direction can be secured. As a result, the boundary surface 211 between the main body portion 210 and the first pad layer 100 can be aligned with the shape of the human body, particularly the sides of the buttocks and thighs, in a wide range to the left and right, so that the seated person P can use the vehicle. When sitting on the seat S, the second pad layer 200 can more firmly support the buttocks and the sides of the thighs of the seated person P, and can reduce the feeling of fatigue even when sitting for a long time.

Further, when the second pad layer is arranged only on the left and right outer sides of the first groove 43A, the second pad layer is arranged at a position away from the seated person P, so that the feeling of fatigue is reduced. Although there is a risk that the function of the second pad layer cannot be fully exerted, by arranging the second pad layer 200 so as to straddle the first groove 43A, the function of the second pad layer 200 can be fully exerted. It will be possible. This makes it possible to reduce the feeling of 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 inside than the first groove 43A, the user sits for a long time as compared with the case where the thickness of the second pad layer is constant. The cushion pad 40, which has the function of less fatigue, can be made thinner.

Further, since the left and right inner portions of the first pad layer 100 are thinner toward the outside than the first groove 43A, the user sits for a long time as compared with the case where the thickness of the first pad layer is constant. The cushion pad 40, which has the function of less fatigue, can be made thinner.

Further, since the second pad layer 200 has the extending portion 220, the posterior portion of the buttocks of the seater P can be supported by the hard second pad layer 200 via the soft first pad layer 100, so that the sitting comfort is ensured. However, 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 portion of the buttocks of the seated person P is 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 ensuring a comfortable seating.

Further, since the boundary surface 231 between the connecting portion 230 and the first pad layer 100 is a concave curved curved surface that inclines downward toward the front, the shape along the shape from the buttocks to the waist of the human body by the boundary surface 231. Will be formed. As a result, when the seated person P sits on the vehicle seat S, he / she does not feel a sudden change in hardness, 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 is likely to be applied around the ischium P1 and the degree of reduction of the feeling of fatigue may decrease. Since the second pad layer 200 is not arranged in a predetermined range around the hip point HP, the pressure around the ischium P1 can be more reliably reduced as compared with the case where the second pad layer is arranged near the hip point HP. can. As a result, the blood circulation around the ischium P1 is less likely to deteriorate, 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 arranged 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 seated person P sits on the vehicle seat S, it is possible to prevent the second pad layer 200 from sinking downward. As a result, the function of the second pad layer 200 can be fully exerted, so that the feeling of fatigue can be further reduced even when sitting for a long time.

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

Although one embodiment of the invention has been described above, the present invention is not limited to the above embodiment. The specific configuration can be appropriately changed as described below without departing from the spirit of the invention.
For example, in the above 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 shown in FIG. 7, the left and right second pad layers 200 may have a configuration in which the extension portions 220 are not connected.

Further, in the above 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. Specifically, in the form shown in FIG. 8, the main body 210 of each second pad layer 200 is arranged along the first groove 43A over the range from the front end to the rear end of the cushion pad 40 in the front-rear direction. ing.

Further, in the form shown in FIG. 8, the left and right second pad layers 200 are at least a part 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 narrows toward the front. Specifically, in the main body 210, the left and right outer edges of the portion in front of the second groove 43B extend substantially straight along the front-rear direction, whereas the left and right of the portion in front of the second groove 43B. The inner edge of the direction is located on the outer side in the left-right direction as it goes forward. According to such a configuration, the hard second pad layer 200 is arranged so as to gradually move away from the thighs of the occupant as it goes forward, so that when the occupant sits on the vehicle seat S. In addition, since you do not feel a sudden change in hardness, you can achieve a comfortable sitting comfort.

Further, in the above embodiment, the second pad layer 200 has a main body portion 210 extending back and forth on both the left and right sides of the hip point HP, and an extending portion 220 extending left and right inward behind 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 have an extension portion. In addition, in order to obtain the effect of firmly supporting the buttocks and the sides of the thighs of the seated person by the second pad layer 200 and relatively lowering the pressure around the ischium P1, the second pad layer 200 is used. It suffices if it is placed on both the left and right sides of the hip point HP.

Further, in the form shown in FIG. 9, the second pad layer 200 is arranged on the second S spring 32 in the front-rear direction, but is not arranged 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 arranged on the first S spring 31.

Further, in the above-described embodiment, the boundary surface 211 of the second pad layer 200 and the first pad layer 100 is an inclined surface that inclines downward toward the left and right inward, 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 surface of the left and right second pad layers with the first pad layer follows the shape of the human body as much as possible.

Further, in the above embodiment, two first S springs 31 as the first support member are arranged in the center in the left-right direction, but the present invention is not limited to this, and for example, only one may be arranged. One or more may be arranged. Further, in the above-described embodiment, the second S spring 32 as the second support member is arranged one on each of the left and right sides of the first S spring 31, but the present invention is not limited to this, and a plurality of second S springs 32 are arranged on each of the left and right sides. May be good. Further, in the above embodiment, the S spring 30 is exemplified as the support member, but the present invention is not limited to this, and for example, a wire-shaped member other than the S spring may be used, or a plate-shaped member may be used. .. Further, in the above-described embodiment, both the first support member and the second support member are support members (S springs 30) having the same configuration, but the present invention is not limited to this, and for example, one is a wire-shaped member. Support members having different configurations may be used, such that the other is a plate-shaped member.

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

Further, in the above embodiment, the second pad layer 200 is arranged under the first pad layer 100 so as to be exposed under the cushion pad 40, but the present invention 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 under the cushion pad.

Further, in the above embodiment, the cushion pad 40 has a configuration having two layers, a first pad layer 100 and a second pad layer 200, but the present invention is not limited to this, and for example, the first pad layer and the second pad are used. It may be configured to have one or more layers in addition to the layers. 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 composed of a single pad material (part), but the present invention is not limited to this, and each is composed of a plurality of parts. 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 parts. 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 an automobile is exemplified as a seat, but the present invention is not limited to this, and the vehicle seat mounted on a vehicle other than an automobile, for example, a railroad vehicle, a ship, an aircraft, or the like. May be. Further, the seat is not limited to a seat for vehicles, and may be a seat used at home, for example.

Further, each element described in the above-described embodiment and modification may be arbitrarily combined and carried out.

30 S spring 31 1st S spring 32 2nd S spring 40 Cushion pad 43A 1st groove 50 Cover material 100 1st pad layer 200 2nd pad layer 211 Boundary surface 220 Extension part 230 Connecting part 231 Boundary surface D11 1st distance D12 1st 2 distance D13 3rd distance HP hip point S vehicle seat

Claims (1)

A seat including a cushion frame having left and right side frames arranged apart from each other on the left and right, and a cushion pad and a skin material to be put on the cushion frame.
The cushion pad has a first pad layer and left and right second pad layers that are arranged under the first pad layer on both the left and right sides of the seated person's hip point and are harder than the first pad layer. ,
In the cross section orthogonal to the front-rear direction passing through the hip point, the boundary surface of the second pad layer with the first pad layer is located inward in the left-right direction of the cushion pad as it goes down, and faces downward. It has a dented shape and is placed between the left and right side frames.
The left and right side frames support the portion of the first pad layer on the lateral side in the left-right direction from the second pad layer from below.
The cushion pad has left and right grooves for suspending the skin material on both the left and right sides of the hip point.
The second pad layer is a sheet characterized in that its position in the vertical direction overlaps with the groove.

Images