JP7332955B2 - vehicle seat - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of protecting the neck of an occupant when an impact such as a collision occurs.

BACKGROUND ART There is a vehicle seat provided with an active headrest for protecting the occupant's neck from impact and suppressing whiplash in the event of a rear-end collision of the vehicle (Patent Document 1).

JP 2009-67247 A

In the event of a rear-end collision (rear collision), when a backward moving load acts on the occupant and the occupant's head is restrained by the headrest and the thorax sinks into the seat back, the phase difference between the neck and thorax ( Anterior-posterior slippage) can occur, leading to whiplash. In particular, smaller occupants were more likely than larger occupants to suffer from whiplash because their bodies were more likely to sink into the seatback.

Conventionally, attempts have been made to appropriately support the occupant's head in order to suppress the occurrence of whiplash. However, in the present invention, it is possible to appropriately restrain both the occupant's head and chest in the event of a rear-end collision. is desirable. In order to reduce the burden on the neck, it is important to prevent the chest from sinking while supporting the head.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its object is to suppress the sinking of the chest in the event of a rear-end collision regardless of the physique of the occupant, thereby reducing the burden on the neck. It is to provide a sheet.

According to the vehicle seat of the present invention, the vehicle seat includes a seat back, and the seat back includes a seat back frame and a cushion pad placed on the seat back frame. The cushion pad is supported by a support member attached to the seat back frame, and the cushion pad reduces reaction force acting on the occupant's chest when a backward movement load acts on the occupant. The seat back includes an outer skin covering the cushion pad, and the seat back frame suppresses sinking of the occupant's chest at a position facing the reaction force lowering portion. a subduction suppressing member for the vehicle seat, and the length of the subduction suppressing member in the vertical direction of the vehicle seat extends longer than the length of the reaction force reduction portion in the vertical direction of the vehicle seat. resolved by

Further, in the above configuration, a skin attachment member for attaching the skin to the cushion pad, the skin attachment member extending in the width direction of the vehicle seat; It is preferable that the lower end is provided above the skin attachment member .

Further, in the above configuration, the lower end of the subduction suppressing member is provided above the upper end of the support member, and the rear end portion of the reaction force lowering portion is the subduction suppressing member in the front-rear direction of the vehicle seat. is preferably arranged behind the front end position of the .

Further, in the above configuration, the sinking suppressing member may be arranged such that the rear end portion of the vehicle seat in the front-rear direction is attached to the rear of the rear end portion of the side frame .

Further, in the above configuration, the sinking suppressing member may be arranged so that the front end portion of the vehicle seat in the front-rear direction is attached forward of the front end portion of the side frame .

Further, in the above configuration, the suspension portion formed in the cushion pad so as to extend along the vertical direction of the vehicle seat may extend toward the end of the reaction force lowering portion in the width direction of the vehicle seat. and the subduction suppressing member .

Further, in the above configuration, the sinking suppressing member may be arranged such that the rear end portion of the vehicle seat in the front-rear direction is located forward of the rear end portion of the cushion pad .

Further, in the above configuration, a recess is disposed at a position behind the reaction force reduction portion in the cushion pad, and the distance from the front end to the rear end of the recess is greater than the thickness of the sinking suppressing member . should be provided.

Further, in the above configuration, a recess is disposed at a position behind the reaction force reduction portion in the cushion pad, and the thickness of the reaction force reduction portion in the front-rear direction of the vehicle seat is greater than that of the sinking suppressing member . It is preferable that it is provided larger than the thickness.

1 is an external view of a vehicle seat according to an embodiment of the invention; FIG. 1 is a perspective view of a seatback frame of a vehicle seat according to one embodiment of the present invention; FIG. 1 is a perspective explanatory view showing the relationship between a seat frame and a seat cushion of a vehicle seat according to one embodiment of the present invention; FIG. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 and is an explanatory diagram showing the structure of the seatback according to one embodiment of the present invention; FIG. 4 is a cross-sectional view taken along line BB of FIG. 3 and is an explanatory view showing the structure of the seatback according to the embodiment of the present invention; FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 and is an explanatory diagram showing the structure of a seatback according to a modification of the embodiment of the present invention; FIG. 5 is a perspective view of a seatback frame according to a modified example of the embodiment of the present invention; FIG. 4 is a cross-sectional view taken along the line BB of FIG. 3 and is an explanatory view showing the structure of the seatback according to the modified example of the embodiment of the present invention;

A seat frame according to an embodiment of the present invention (hereinafter referred to as the present embodiment) will be described below with reference to FIGS. 1 to 8. FIG. As a vehicle seat according to the present embodiment, a vehicle seat mounted on a vehicle will be described as an example, but the vehicle seat is not limited to a vehicle seat, and a seat mounted on a vehicle other than a vehicle. may be

The embodiments described below are merely examples for facilitating understanding of the present invention, and do not limit the present invention. That is, the shape, size, arrangement, etc. of the members described below can be changed and improved without departing from the scope of the present invention, and the present invention naturally includes equivalents thereof.

Regarding terms indicating directions in this specification, each direction is defined as in FIG. Specifically, in the following description, the term "front-rear direction" means the front-rear direction when viewed from the person seated in the vehicle seat, and is the direction that coincides with the running direction of the vehicle. The "seat width direction" means the width direction of the vehicle seat, and coincides with the left-right direction when viewed from the person seated in the vehicle seat. Further, the "vertical direction" means the height direction of the vehicle seat, and corresponds to the vertical direction when the vehicle seat is viewed from the front.

[1. Configuration of vehicle seat S]
A vehicle seat S according to this embodiment has an appearance shown in FIG. FIG. 1 is a diagram showing the appearance of a vehicle seat S. As shown in FIG. In FIG. 1, a portion of the vehicle seat S (specifically, a portion of the seat back S2) is shown without a trim cover for convenience of illustration.

The vehicle seat S includes a seat cushion S1 that serves as a sitting portion that supports the buttocks of the seated person, a seat back S2 that serves as a backrest portion that supports the back of the seated person, and a seat back S2 that is disposed above the seated person's head. It has a headrest S3 that supports the as a main component. The seat cushion S1 is configured by placing a cushion pad on a seat cushion frame (not shown) and covering the cushion pad with a trim cover. The seat back S2 is constructed by placing a cushion pad 2 on a seat back frame 1 as a skeleton shown in FIG. The headrest S3 is formed by arranging a pad material (not shown) on a core material (not shown) and covering it with a trim cover.

The cushion pad of the seat cushion S1 and the seat back S2 is a urethane base material formed by foam molding using a urethane foam material. The trim cover T of the seatback S2 has a first hanging portion Ta (right hanging portion) provided on the right side of the seatback and extending in the vertical direction, and a second hanging portion Ta (right side hanging portion) provided on the left side of the seatback and extending in the vertical direction. A suspension portion Tb (left suspension portion), a third suspension portion Tc (upper suspension portion) provided on the upper side of the seat cushion and extending in the seat width direction, and a third suspension portion Tc (upper side suspension portion) provided on the lower side of the seat cushion and extending in the seat width direction An extending fourth suspension portion Td (lower suspension portion) is provided. Further, as will be described later, thin portions are provided at positions corresponding to the hanging portions of the cushion pad 2 so as to be thinner than the surrounding portions.

[2. seat back frame]
The configuration of the seatback frame 1 will be described with reference to FIG. The seatback frame 1 includes a pair of side frames 10 that are spaced apart from each other in the left and right direction and extend in the vertical direction, an upper frame 11 that connects the upper ends of the side frames 10, and the lower ends of the side frames 10. It is configured in a frame shape with the lower frame 12 .

A pillar support portion 13 is provided on the upper frame 11 , and a headrest frame (not shown) is provided on the pillar support portion 13 . A headrest S3 is configured by providing a cushion pad on the outside of the headrest frame.

The side frame 10 is formed by press-working a sheet metal, and is composed of a substantially plate curved so that the width at the bottom is wider than the width at the top. As shown in FIG. 2, a substantially flat side plate 14, a front edge portion 15 formed by folding the front end portion of the side plate 14 inward in a U-shape, and a rear end portion bent inward in an L-shape. and a trailing edge 16 . The side frame 10 is provided with a locking portion 18 having a locking hole into which both ends of a pair of bridging members 17 as support members made of S springs for supporting the cushion pad 2 from behind are locked. As for the bridging members, two upper bridging members 17a and a lower bridging member 17b are provided in the vertical direction.

A chest support member 3, which will be described in detail below, is installed at a position above the seatback frame 1. As shown in FIG.

[3. Configuration of seat back]
Each configuration of the seat back S2 of the vehicle seat S according to this embodiment will be described below. Specifically, a sinking suppressing member (chest support member 3) for suppressing sinking of the occupant's chest when a backward movement load acts on the occupant in a rear-end collision, etc. The reaction force reducing portion (flexible portion 22) for reducing force and the side support member (side pad 4) for laterally supporting the occupant's chest will be described with reference to FIGS.

(3.1. Chest support member)
As shown in FIG. 2, the seat back S2 of the vehicle seat S according to the present embodiment is designed to prevent the chest of the occupant from sinking when a backward movement load acts on the occupant such as in the event of a rear-end collision. A chest support member 3 is provided as a restraining member. The chest support member 3 is a plate member made of resin or the like, and has a substantially rectangular shape with ribs on its surface when viewed from the front. Left and right ends (right end 3 a and left end 3 b ) of the chest support member 3 in the seat width direction are attached to left and right side frames 10 of the seatback frame 1 . Specifically, the right end 3a of the chest support member 3 is attached to the right side frame 10, and the left end 3b is attached to the left side frame 10. As shown in FIG.

The chest support member 3 is arranged such that the lower end portion 3d is located above the upper end of the upper bridge member 17, that is, the upper bridge member 17a. According to the chest support member 3 arranged at such a position in the seat back frame 1, it is possible to prevent the occupant's chest from sinking at an appropriate position. Further, the upper end portion 3c of the chest support member 3 is arranged at a position where it does not interfere with other members such as the pillar support portion 13. As shown in FIG.

Further, since the chest support member 3 is provided so as to be positioned only above the upper end of the upper bridging member 17a, it is possible to appropriately prevent the chest of the occupant from sinking. Furthermore, the chest support member 3 can be arranged without interfering with other members provided on the seat back S2.

(3.2. Reaction Force Decrease Part)
As shown in FIGS. 3 and 4, the seat back S2 of the vehicle seat S according to this embodiment reduces the reaction force acting on the occupant's chest when a backward moving load acts on the occupant such as in the event of a rear-end collision. It has a flexible portion 22 which is a reaction force lowering portion for. FIG. 3 is a perspective explanatory view showing a state in which a part of the seatback S2 is cut away, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. As shown in FIGS. 3 and 4, a recess 21 is provided by core removal at a position facing the chest support member 3 of the cushion pad 2 that constitutes the seat back S2. A flexible portion 22 is formed.

The easily flexible portion 22 is configured to be more flexible than the periphery of the easily flexible portion 22 by providing a recess 21 at the rear in the seat front-rear direction. When the occupant's chest sinks, the reaction force generated in the occupant's chest can be reduced. If the chest support member 3 is provided, it is expected that the reaction force generated in the chest of the occupant will increase when the chest of the occupant sinks in the event of a rear-end collision. , it is possible to suppress the reaction force generated in the occupant's chest.

In particular, a passenger with a small physique experiences a large acceleration at the time of a rear collision, and the reaction force generated in the chest becomes large. It is possible to reduce the reaction force.

As shown in FIG. 4, the cushion pad 2 is provided with thin portions 23 and 24 at positions corresponding to hanging portions formed to extend along the vertical direction of the seat back S2. Specifically, a thin portion 23 is provided at a position corresponding to the first hanging portion Ta of the cushion pad 2, and a thin portion 24 is provided at a position corresponding to the second hanging portion Tb. The recessed portion 21 and the flexible portion 22 are provided inside the right thin portion 23 and the left thin portion 24 in the seat width direction. That is, the recessed portion 21 and the flexible portion 22 are provided inside the first hanging portion Ta and the second hanging portion Tb in the seat width direction. In other words, the flexible portion 22 is arranged near the center of the seat back S2 in the seat width direction. Therefore, when the occupant's chest sinks, the center of the seat back S2 tends to sink, so that the backward moving load can be received in the vicinity of the center in the seat width direction.

(3.3. Side support member)
As shown in FIGS. 3 and 4, the seat back S2 of the vehicle seat S according to the present embodiment supports the occupant's chest from the sides when a backward moving load acts on the occupant such as in the event of a rear-end collision. It has a side pad 4 which is a side support member. The side pads 4 are made of resin or the like, and are provided on the left and right sides in the seat width direction. Specifically, the side pad 4 is arranged between the side frame 10 and the cushion pad 2 in the seat width direction. Specifically, the side pad 4 is arranged between the side plate 14 of the side frame 10 and the cushion pad 2 in the seat width direction.

The seat back S2 of the present embodiment has a flexible portion 22, and can reduce the reaction force generated in the chest of the occupant in the event of a rear-end collision. Subduction may increase. The seat back S2 of the present embodiment is provided with side pads 4 to prevent the chest of a large occupant from sinking from the left side and right side in the seat width direction in the event of a rear collision, thereby allowing the passenger to move backward. It is possible to distribute the moving load. Therefore, even if the occupant has a large physique, it is possible to prevent the chest from sinking.

5 shows a cross-sectional view along the line BB of FIG. It extends longer than the length (l) of the recess 21 in the vertical direction of the seat (L>l in FIG. 5). With such a configuration, the chest support member 3 is arranged in the vertical direction of the seat on the back surface of the flexible portion 22, which is the area where the reaction force is reduced. It is possible to reduce the generated reaction force and appropriately suppress the chest of the occupant from sinking.

As shown in FIG. 5, the cushion pad 2 of the seat back S2 is embedded with an insert wire 26, which is a skin attachment member for attaching the skin covering the cushion pad 2 to the cushion pad 2. extending in the direction The lower end of the chest support member 3 is provided above the insert wire 26 . The position of the insert wire 26 is the height position of the third hanging portion Tc (upper hanging portion), which is the hanging portion near the chest and extends in the seat width direction, in other words, the third hanging portion Tc. , and the chest support member 3 is arranged at an appropriate height position in the seat back S2. It is possible to appropriately suppress the occupant's chest from sinking when the backward movement load is applied.

[4. Sinking suppression effect of the chest at the time of rear impact (when backward movement load acts)]
In the vehicle seat S of this embodiment, when a backward moving load is applied to the occupant in the event of a rear-end collision or the like, both the occupant's head and chest are appropriately restrained, and the occupant's neck and thorax are positioned forward and backward of the seat. It is possible to suppress the occurrence of whiplash by suppressing the deviation of the direction and reducing the burden on the neck of the occupant.

Specifically, as shown in FIGS. 1 and 2, a headrest S3 is arranged at a position corresponding to the occupant's head, and a chest support member 3 is arranged at a position corresponding to the occupant's chest on the seat back S2. It is Therefore, when a backward movement load is applied to the occupant in the event of a rear-end collision, the occupant's head is prevented from being displaced rearward by the headrest S3, and the occupant's chest is prevented from being displaced rearward by the chest support member 3. Displacement is blocked.

At this time, there is a possibility that a large reaction force will be applied to the occupant due to the existence of the chest support member 3 . In this embodiment, since the cushion pad 2 of the seat back S2 is provided with the flexible portion 22, it is possible to suppress the reaction force generated in the occupant's chest. In particular, an occupant with a small physique (an occupant with a light weight) may experience a large acceleration in the event of a rear-end collision, and may receive a large reaction force. Thus, it is possible to suppress the reaction force generated in the chest.

In addition, since the seat back S2 is provided with side pads 4 in the seat width direction, in the event of a rear-end collision, the chest of a large-bodied occupant is prevented from sinking from the left and right sides in the seat width direction, and the occupant moves backward. It is possible to distribute the moving load. Therefore, even if the occupant has a large physique, it is possible to prevent the chest from sinking.

As described above, according to the vehicle seat S of the present embodiment, when a backward movement load acts on the occupant such as in the event of a rear-end collision, the chest of the occupant is prevented from sinking, and the reaction force generated on the chest of the occupant is suppressed. is properly suppressed. Therefore, by restraining the occupant's head and chest in the event of a rear-end collision, displacement of the occupant's neck and chest in the seat longitudinal direction is suppressed. Therefore, the burden on the neck of the occupant is reduced, and it is possible to suppress the onset of whiplash. In addition, the vehicle seat S of the present embodiment can appropriately prevent the chest from sinking, regardless of whether the occupant has a small physique or has a large physique.

[5. Modification]
The invention is not limited to the embodiments described above. Modifications of the present embodiment will be described below with reference to FIGS.

In the above-described embodiment, an example in which the chest support member 3 and the side pads 4 are separated is shown, but as shown in FIG. 6, the chest support member 3X and the left and right side pads 4X may be integrated. By integrating the chest support member 3X and the side pads 4X, it is possible to prevent the occupant's chest from sinking from the rear (rear) and side (side), so that the backward movement load can be appropriately distributed. Dispersion is possible. In addition, since it is not necessary to separately attach a side pad to the seat back frame 1, workability is improved.

In the above embodiment, the chest support member 3 is provided separately from the pillar support section 13, but as shown in FIG. 7, the chest support member 3Y and the pillar support section 13 may be integrated. Since the chest support member 3Y and the pillar support part 13 are integrated, the chest support member 3Y is stably attached to the seat back frame 1, so that when the chest of the occupant sinks, it moves backward. It becomes possible to receive the load firmly.

Although the chest support member 3 is provided separately from the seatback frame 1 in the above embodiment, the chest support member and the seatback frame 1 may be integrated. Specifically, the chest support member may be integrated with the upper frame 11 or the chest support member may be integrated with the left and right side frames 10 . Since the chest support member and the upper frame 11 are integrated with each other, the chest support member is stably arranged, so that when the chest of the occupant sinks, the backward movement load is firmly received from the rear. becomes possible.

In the above-described embodiment, an example in which the insert wire 26 is provided at a height position below the recess 21 provided in the cushion pad 2 is shown, but as shown in FIG. may be provided at a position overlapping with the recessed portion 21 provided in the cushion pad 2X. At this time, the protruding portion 27 protrudes rearward from the concave portion 21 . Therefore, the length (d1) of the recess 21 in the seat front-rear direction is longer than the length (d2) of the recess 21 in the seat front-rear direction at the portion where the projecting portion 27 is provided (d1>d2). Further, the length (d3) in the seat front-rear direction of the recess 21 at a position below the protrusion 27 of the recess 21 is also the length (d2) in the seat front-rear direction of the recess 21 at the portion where the protrusion 27 is provided. (d3>d2).

In the above embodiment, the cushion pad 2 constituting the seat back S2 is cored to form the concave portion 21 to provide the flexible portion 22 which is the reaction force lowering portion. , but not limited to core removal of cushion pads. For example, a material with a lower density than the urethane base material (urethane foam) or a material with a lower hardness is placed at the rear position of the cushion pad where the reaction force is reduced. By doing so, it is also possible to provide an area that is more flexible than the surrounding area. When forming a flexible region by such a method, it is possible to set a desired reaction force reduction characteristic by selecting an appropriate material.

Although the side pads 4 are provided separately from the seat back frame 1 in the above embodiment, the side pads and the seat back frame 1 may be integrated. Specifically, the side pads may be integrated with the upper frame 11 or the side pads may be integrated with the left and right side frames 10 . Since the side pads are stably arranged by integrating the side pads and the upper frame 11, when the occupant's chest sinks, the backward moving load can be firmly received from the side. becomes possible.

In addition, the side pads can be made harder than the surrounding area by injecting or infiltrating hardening resin into the area corresponding to the chest of the occupant in the cushion pad 2 of the seat back S2. be. By substituting the side pads in this manner, there is no need to prepare additional side pads, and workability is improved.

Furthermore, in the above-described embodiment, an example in which one side pad 4 is provided on each side in the seat width direction has been shown, but the number of side pads is not limited to this, and a plurality of side pads can be It is also possible to provide them on the left and right sides in the seat width direction. At this time, it is also possible to stack and provide a plurality of side pads.

In the above-described embodiment, an example in which the chest support member 3 and the side pads 4 are made of resin is shown, but the material forming the chest support member 3 and the side pads 4 is not limited to resin. It is preferable to use resin from the viewpoint of weight reduction, but instead of resin, for example, metal may be used. When metal is used as a material for forming the chest support member 3 and the side pads 4, it is possible to secure necessary rigidity even if the chest support member 3 and the side pads 4 are made thin.

Furthermore, as the material for the chest support member 3 and the side pads 4, it is possible to use a material exhibiting a dilatant physical property that is normally soft and becomes hard when receiving an impact. When a material that exhibits dilatant physical properties is used, it does not give discomfort to the occupants who are normally seated softly. becomes possible.

The shape of the chest support member 3 is not limited to a flat shape, and may have a curved shape that curves in the left-right direction (seat width direction). Specifically, the right end 3 a and the left end 3 b of the chest support member 3 may be curved so as to be located forward of the central portion of the chest support member 3 . Also, the chest support member 3 may have a curved shape that curves in the front-rear direction. Specifically, the upper end portion 3c and the lower end portion 3d of the chest support member 3 may be curved so as to be positioned behind the central portion of the chest support member 3. As shown in FIG. Furthermore, it is possible to thicken the left and right side portions (the right end portion 3a and the left end portion 3b) of the chest support member 3, or to thicken the central portion.

As described above, the seat back according to the present embodiment has been described as an example of the seat back of a vehicle seat mounted on a vehicle. The seat back according to the present embodiment is not limited to the seat back of a vehicle seat, and is a seat that may cause an impact to the occupant, particularly the chest of the occupant when the impact occurs. There is no particular limitation on the application as long as it is the seat back of the obtained seat. For example, the seat back of the present invention may be a seat mounted on a vehicle such as an aircraft or a ship other than a ground vehicle having wheels such as an automobile or a railway.

S Vehicle seat (vehicle seat)
S1 seat cushion S2 seat back S3 headrest T trim cover Ta first hanging portion (right side hanging portion)
Tb second hanging part (left hanging part)
Tc third hanging part (upper hanging part)
Td Fourth suspension part (lower suspension part)
Reference Signs List 1 seatback frame 10 side frame 11 upper frame 12 lower frame 13 pillar support 14 side plate 15 front edge 16 rear edge 17 installation member 17a upper installation member (support member)
17b Lower installation member (support member)
18 Locking portion 2, 2X Cushion pad 21 Recessed portion 22 Flexible portion (reaction force lowering portion)
23 thin portion 24 thin portion 25 thin portion 26 insert wire (skin attachment member)
27 Protrusions 3, 3X, 3Y Chest support member (subduction suppression member)
3a right end 3b left end 3c upper end 3d lower end 4 side pad (side support member)

Claims (9)

A vehicle seat having a seat back,
The seat back is
a seat back frame;
a cushion pad placed on the seat back frame;
The cushion pad is supported by a support member attached to the seat back frame,
The cushion pad is formed with a reaction force reducing portion for reducing a reaction force acting on the chest of the occupant when a backward movement load acts on the occupant,
The seat back includes a skin that covers the cushion pad,
The seatback frame includes a sinking suppressing member for suppressing sinking of the occupant's chest at a position facing the reaction force lowering portion,
The vehicle seat, wherein the vertical length of the subduction restraint member extends longer than the vertical length of the reaction force reducing portion of the vehicle seat. a skin attachment member for attaching the skin to the cushion pad, the skin attachment member extending in the width direction of the vehicle seat;
2. The vehicle seat according to claim 1 , wherein a lower end of said reaction force lowering portion is provided above said skin attachment member . a lower end of the subduction suppressing member is provided above an upper end of the supporting member;
3. The vehicle seat according to claim 2, wherein a rear end portion of said reaction force lowering portion is arranged rearward of a front end position of said sinking suppressing member in the longitudinal direction of said vehicle seat. 4. The apparatus according to any one of claims 1 to 3, wherein the sinking suppressing member is arranged such that a rear end portion of the vehicle seat in the front-rear direction is attached rearward of a rear end portion of the side frame. Vehicle seat as described. The subduction suppressing member is
The vehicle seat according to any one of claims 1 to 4, wherein a front end portion of the vehicle seat in the front-rear direction is attached and arranged forward of front end portions of the side frames. The hanging portion formed in the cushion pad so as to extend along the up-down direction of the vehicle seat has an end portion of the reaction force lowering portion and the sinking suppressing portion in the width direction of the vehicle seat. 6. A vehicle seat according to any one of claims 1 to 5, characterized in that it is provided between members . 7. The sinking suppression member according to any one of claims 1 to 6, wherein a rear end portion of the vehicle seat in a front-rear direction is disposed forward of a rear end portion of the cushion pad. The vehicle seat described in . A concave portion is arranged at a position behind the reaction force lowering portion in the cushion pad,
8. The vehicle seat according to any one of claims 1 to 7, wherein a distance from a front end to a rear end of the recess is set to be greater than a thickness of the subduction suppressing member . A concave portion is arranged at a position behind the reaction force lowering portion in the cushion pad,
9. The vehicle according to any one of claims 1 to 8, wherein the thickness of the reaction force reduction portion is larger than the thickness of the subduction suppressing member in the front-rear direction of the vehicle seat. sheet for.