JP2024110826A - Seat cushion and vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat cushion and a vehicle seat which enable inhibition of bottoming even when a pad material is further made thinner.

SOLUTION: On a seat lower side of the buttocks P1 of a seated occupant P, an opening 26 is formed on a seat cushion pad 16. Also a bottoming inhibition member 28 is disposed in the opening 26, a cavity part 30 is disposed between the bottoming inhibition member 28 and the seat cushion pad 16, and an impact on the seated occupant P is cushioned by the cavity part 30. In other words, an impact force is inputted to the seat cushion pad 16 via the seated occupant P, and when the seat cushion pad 16 bends toward a seat lower side, the impact on the seated occupant P is cushioned by the cavity part 30, the impact on the seated occupant P is absorbed by the bottoming inhibition member 28, and bottoming of the seat cushion 12 is inhibited.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a seat cushion and a vehicle seat.

For example, Patent Document 1 discloses a technology for seat cushions for vehicle seats that can eliminate the feeling of bottoming out even when the seat cushion pad is made thinner. In this prior art, the rebound elasticity is increased by including polyol as a raw material for the seat cushion pad, resulting in a sufficient rebound feeling and reducing the feeling of bottoming out.

JP 2006-166987 A

However, in today's automobiles, the floor position is higher in electric vehicles (EVs) and other vehicles due to the installation of batteries, but the interior space must be maintained, so there is a demand for even thinner seat cushion pads (padding materials).

The present invention takes the above into consideration and aims to provide a seat cushion and a vehicle seat that can prevent bottoming out even when the padding is made thinner.

The seat cushion according to the first aspect includes a padding material constituting at least the upper seat side of the seat cushion main body that supports the buttocks and thighs of a seated occupant, a bottoming-out suppression member that is provided on the seat below the buttocks of the seated occupant and spaced from the seat below the padding material and that suppresses bottoming out of the seat cushion main body, and a buffer section that is provided on the seat below the buttocks of the seated occupant and between the padding material and the bottoming-out suppression member and that can reduce impacts on the seated occupant.

The seat cushion according to the first aspect includes a padding material, a bottoming out prevention member, and a cushioning portion, and the padding material constitutes at least the upper seat side of the seat cushion body (seat cushion) that supports the buttocks and thighs of a seated occupant.

The bottoming-out suppression member is provided on the seat below the buttocks of the seated occupant and on the seat below the padding material, and the bottoming-out suppression member prevents the seat cushion from bottoming out. The shock-absorbing portion is provided on the seat below the buttocks of the seated occupant and between the padding material and the bottoming-out suppression member, and the shock-absorbing portion can reduce the impact on the seated occupant.

For example, when an impact load is applied to a seated occupant due to a frontal collision of the vehicle, stress may be concentrated on the buttocks (particularly the ischial bones) of the seated occupant. For this reason, in this embodiment, the seat cushion on the lower side of the seat for the seated occupant's buttocks has a three-layer structure consisting of a padding material, a shock-absorbing part, and a bottoming-out prevention member.

The padding absorbs the impact on the seated occupant. In addition, a bottoming-out prevention member is provided on the seat underside of the padding and on the seat underside of the seated occupant's buttocks, and the bottoming-out prevention member makes it possible to prevent the seat cushion from bottoming out.

Here, a buffer section is provided between the padding and the bottoming out prevention member, which can cushion the impact on the seated occupant. This makes it possible to further prevent the seat cushion from bottoming out in this embodiment. As a result, it becomes possible to further thin the padding.

The seat cushion according to the second aspect is the seat cushion according to the first aspect, in which a support member is provided on the seat cushion main body and supports the padding from the seat underside, an opening is formed in the support member on the seat underside of the buttocks of the seated occupant, and the buffer portion and the bottoming out prevention member are provided inside the opening.

In the seat cushion according to the second aspect, a support member is provided on the seat cushion body, and the padding material is supported from the underside of the seat by the support member. In addition, an opening is formed on the underside of the seat of the seated occupant's buttocks in the support member, and a buffer portion and a bottoming out prevention member are provided inside the opening.

Here, since the padding is supported by the support member, when an impact force is input to the padding through the seated occupant, the padding receives a reaction force from the support member and deforms in the compression direction, thereby absorbing the impact on the seated occupant.

Meanwhile, an opening is formed in the support member on the seat below the buttocks of the seated occupant. Therefore, when an impact force is input to the padding material through the seated occupant, the padding material is able to deform (bend) further toward the seat below within the opening. A buffer part and a bottoming out prevention member are provided inside the opening.

As a result, when an impact force is input to the padding through a seated occupant, the padding bends toward the lower side of the seat, and the shock absorber reduces the impact on the seated occupant, while the bottoming-out prevention member absorbs the impact on the seated occupant, preventing the seat cushion from bottoming out.

The seat cushion according to the third aspect is the seat cushion according to the first or second aspect, in which the resilience modulus of the pad material, the buffer section, and the bottoming out prevention member is set so that the buffer section is lower than that of the pad material and the bottoming out prevention member.

In the seat cushion according to the third aspect, the resilience modulus of the pad material, the shock-absorbing portion, and the bottoming-out suppression member is set so that the shock-absorbing portion has a lower resilience modulus than the pad material and the bottoming-out suppression member, and among the pad material, the shock-absorbing portion, and the bottoming-out suppression member, the shock-absorbing portion has the lowest resilience modulus.

In other words, the hardness of the padding and bottoming out prevention member is higher than that of the cushioning portion. By increasing the hardness of the padding, in this embodiment, the seated occupant feels more supported by the padding than when the padding has a lower hardness, preventing the body from wobbling and ensuring a comfortable sitting experience.

The seat cushion according to the fourth aspect is the seat cushion according to any one of the first to third aspects, in which the buffer portion is a hollow portion formed between the pad material and the bottoming out prevention member.

In the seat cushion according to the fourth aspect, the cavity formed between the pad material and the bottoming out prevention member serves as a shock absorbing part. When an impact force is input to the pad material through the seated occupant, the pad material can bend toward the lower side of the seat through the cavity. In other words, the cavity allows the pad material to obtain a deformation stroke, which in turn absorbs the impact on the seated occupant.

The seat cushion according to the fifth aspect is the seat cushion according to any one of the first to fourth aspects, further including a spring member within the hollow portion that can absorb impacts on the seated occupant.

In the seat cushion according to the fifth aspect, a spring member is provided within the cavity, which can further absorb the impact on the seated occupant.

The seat cushion according to the sixth aspect is the seat cushion according to any one of the first to fifth aspects, in which the buffer portion is formed of a soft material having a smaller resilience modulus than the bottoming out suppression member.

In the seat cushion according to the sixth aspect, the cushioning portion is formed of a soft member that has a smaller resilience modulus than the bottoming out suppression member. When an impact force is input to the padding material through the seated occupant and the padding material bends toward the lower side of the seat, the impact is absorbed by the padding material and the soft member deforms in the compression direction, which also absorbs the impact on the seated occupant.

The seat cushion according to the seventh aspect is the seat cushion according to any one of the first to sixth aspects, in which the padding is supported from the underside of the seat by a cushion pan attached to a cushion frame that is a framework member of the front seat.

In the seat cushion according to the seventh aspect, the support member is a cushion pan. The cushion pan is attached to a cushion frame that is a framework member of the front seat, so that good body pressure distribution is always achieved, improving seating comfort.

The vehicle seat according to the eighth aspect includes a seat cushion according to any one of the first to seventh aspects and a seat back that supports the back of the seated occupant from the rear side of the seat.

The vehicle seat described in claim 8 makes it possible to enjoy the effects obtained by using the seat cushion according to any one of the first to seventh aspects.

As described above, the present invention provides a seat cushion and a vehicle seat that can prevent bottoming out even when the padding is made thinner.

1 is a plan view showing a rear seat to which a seat cushion of a vehicle seat according to an embodiment of the present invention is applied. 2 is a schematic cross-sectional view showing a state cut along line A-A' shown in FIG. 1A is a cross-sectional view showing a main part for explaining a comparative example, and FIG. 1B is a cross-sectional view showing a main part for explaining the function of the seat cushion of the vehicle seat according to the present embodiment. 3 is a cross-sectional view corresponding to FIG. 2 and showing a first modified example of a seat cushion of the vehicle seat according to the embodiment. FIG. FIG. 11 is a perspective view of a front seat showing a third modified example of the seat cushion of the vehicle seat according to the embodiment. 6 is a schematic cross-sectional view showing the state cut along line B-B' shown in Figure 5.

Below, a vehicle seat to which a seat cushion according to an embodiment of the present invention is applied will be described with reference to the drawings. Note that the arrow FR, as shown appropriately in these drawings, indicates the forward direction of the vehicle seat (the direction in which the seated person faces), the arrow UP indicates the upward direction of the vehicle seat, the arrow RH indicates the rightward direction of the vehicle seat, and the arrow LH indicates the leftward direction of the vehicle seat. Hereinafter, when the directions of front/rear, up/down, and left/right are simply used, they refer to the front/rear of the vehicle seat, the up/down of the vehicle seat, and the left/right of the vehicle seat when facing the direction of travel, unless otherwise specified.

<Configuration of Vehicle Seat>
First, the configuration of the vehicle seat according to this embodiment will be described.

For example, the vehicle seat 10 according to this embodiment shown in FIG. 1 is applied to a rear seat that is located rearward of the front seat (not shown) in the vehicle longitudinal direction, and FIG. 1 shows a plan view of the seat cushion (seat cushion body) 12.

The vehicle seat 10 includes a seat cushion (seat cushion body) 12 that supports the buttocks P1 (see FIG. 2) and thighs P2 (see FIG. 2) of a seated occupant P from the lower side of the seat, a seat back (not shown) that supports the back of the seated occupant from the rear side of the seat, and a headrest that supports the head of the seated occupant from the rear side of the seat.

The headrest may be applied to a left/right separate type vehicle seat, or to a bench seat type vehicle seat. Therefore, the shape of the headrest can be changed as appropriate depending on the seat to which it is applied. Of course, a headrest is not necessarily required.

As shown in FIG. 2, the seat cushion 12 in this embodiment is composed of a seat cushion frame (not shown) which is a skeletal member, a seat cushion pad (pad material) 16 provided on the upper seat side of the seat cushion 12, and a seat cushion skin 18 which covers the seat cushion pad 16.

The seat cushion frame is formed of a metal such as a steel plate or an aluminum alloy, and the seat cushion pad 16 is formed of a foam material such as urethane foam, and elastically supports the buttocks P1 and thighs P2 of the seated occupant P. On the other hand, the seat cushion skin 18 is formed of a cloth material, leather, synthetic leather, PVC, or the like, and the seat cushion pad 16 is covered with the seat cushion skin 18.

As shown in Figs. 1 and 2, the seat cushion 12 includes a main portion 20 that is located in the center of the seat width direction and supports the buttocks P1 and thighs P2 of the seated occupant P from below, and side portions 22 that are located on both sides of the seat width direction around the main portion 20 and enable support for the buttocks P1 and thighs P2 of the seated occupant P from the sides.

In the main portion 20, a structural member (support member) 24 is provided on the seat lower side of the seat cushion pad 16, which is formed along the shape of the lower surface of the seat cushion pad 16 and constitutes the lower end of the seat cushion 12. In other words, the structural member 24 is provided up to the seat lower side of the buttocks P1 of the seated occupant P. The structural member 24 is formed, for example, from EPP (expanded polypropylene) or other resins.

An opening 26 is formed in the structural member 24 at a position corresponding to the seat underside of the buttocks P1 of the seated occupant P, and a bottoming out prevention member 28 formed thinner than the thickness of the structural member 24 is disposed within the opening 26. This bottoming out prevention member 28 is a cushioning member, and is, for example, a sheet-like member formed from a gel body (such as alpha gel), urethane foam, soft rubber, or the like. Such a bottoming out prevention member 28 can absorb impacts on the seated occupant P and can also prevent the seat cushion 12 from bottoming out.

The seat cushion pad 16 and the structural member 24 can be integrated, for example, by integral molding, or by post-installation using welding, adhesives, etc. Therefore, the bottoming out prevention member 28 is attached to the structural member 24 when the seat cushion pad 16 and the structural member 24 are integrated.

For example, although not shown, the bottoming out prevention member 28 may have fins around its back surface that extend beyond the outer shape of the bottoming out prevention member 28, and the fins may be tacked to the structural member 24, thereby integrating the bottoming out prevention member 28 with the structural member 24. In this manner, when the seat cushion pad 16 and the structural member 24 are integrated and the structural member 24 and the bottoming out prevention member 28 are integrated, a hollow portion (buffer portion) 30 is formed between the seat cushion pad 16 and the structural member 24.

In other words, in this embodiment, the seat cushion 12 has a three-layer structure consisting of the seat cushion pad 16, the cavity 30, and the bottoming out suppression member 28 on the seat underside of the buttocks P1 of the seated occupant P. The resilience modulus of the seat cushion pad 16, the cavity 30, and the bottoming out suppression member 28 is lower in the cavity 30 than in the seat cushion pad 16 and the bottoming out suppression member 28. Strictly speaking, the resilience modulus of the seat cushion pad 16 ≧ the bottoming out suppression member 28 > the cavity 30, and the hardness of the cavity 30 is lower than the other members.

Here, the rebound resilience is the rebound resilience in the input load direction, and is an index of rebound resilience, rigidity, or strength, and indicates the degree of elasticity and restorability. In other words, the lower the rebound resilience, the better the absorption of shock and vibration. Note that this rebound resilience is a value measured using a method that complies with Japanese Industrial Standard JIS K 6400-3.

<Functions and Effects of Vehicle Seat>
Next, the operation and effects of the vehicle seat according to this embodiment will be described.

In this embodiment, as shown in FIG. 2, a structural member 24 is provided on the seat underside of the seat cushion pad 16, and an opening 26 is formed in the structural member 24 at a location corresponding to the seat underside of the buttocks P1 of the seated occupant P, and a hollow portion 30 and a bottoming out prevention member 28 are provided within the opening 26.

The seat cushion pad 16 constitutes the upper side of the seat cushion 12 that supports the buttocks P1 and thighs P2 of the seated occupant P, and the bottoming out prevention member 28 is provided on the seat lower side of the seat cushion pad 16 and on the seat lower side of the buttocks P1 of the seated occupant P to prevent the seat cushion 12 from bottoming out.

In this embodiment, as described above, an opening 26 is formed in the seat cushion pad 16 below the seat of the buttocks P1 of the seated occupant P, a bottoming out prevention member 28 is provided within the opening 26, and a cavity 30 is provided between the bottoming out prevention member 28 and the seat cushion pad 16, and this cavity 30 cushions the impact on the seated occupant P.

For example, when an impact load is applied to a seated occupant P due to a frontal collision of the vehicle, stress may be concentrated on the buttocks P1 (particularly the ischial bones) of the seated occupant P directly below the so-called hip point HP. For this reason, in this embodiment, the seat cushion 12 on the seat lower side of the buttocks P1 of the seated occupant P has a three-layer structure consisting of a seat cushion pad 16, a hollow portion 30, and a bottoming out prevention member 28.

That is, as described above, the seat cushion pad 16 is made of a material capable of absorbing shock, such as urethane foam, so that when an impact force is input to the seat cushion pad 16 through the seated occupant P, the impact on the seated occupant P is absorbed (mitigated) by the seat cushion pad 16.

The bottoming out prevention member 28 is made of EPP, resin, etc., and is provided on the seat underside of the seat cushion pad 16 and on the seat underside of the buttocks P1 of the seated occupant P. Therefore, when an impact force is input to the seat cushion pad 16 via the seated occupant P, the seat cushion pad 16 receives a reaction force from the bottoming out prevention member 28 and deforms in the compression direction, thereby absorbing the impact on the seated occupant P and preventing stress concentration on the buttocks P1 of the seated occupant P.

On the other hand, an opening 26 is formed in the bottoming out prevention member 28 on the seat below the buttocks P1 of the seated occupant P. When an impact force is input to the seat cushion pad 16 through the seated occupant P, the seat cushion pad 16 receives a reaction force from the bottoming out prevention member 28 on the seat below the seat around the buttocks P1 of the seated occupant P and deforms in the compression direction, but on the seat below the buttocks P1 of the seated occupant P, the seat cushion pad 16 bends toward the seat below.

A hollow portion 30 and a bottoming out prevention member 28 are provided inside the opening 26. Therefore, when an impact force is input to the seat cushion pad 16 via the seated occupant P and the seat cushion pad 16 bends toward the lower side of the seat, the hollow portion 30 reduces the impact on the seated occupant P, and the bottoming out prevention member 28 absorbs the impact on the seated occupant P, thereby preventing the seat cushion 12 from bottoming out.

More specifically, in this embodiment, a cavity 30 is provided between the seat cushion pad 16 and the bottoming out prevention member 28. When an impact force is input to the seat cushion pad 16 via the seated occupant P, the seat cushion pad 16 can bend toward the lower side of the seat via the cavity 30. In other words, the cavity 30 makes it possible to obtain a deformation stroke of the seat cushion pad 16, and the impact on the seated occupant P is absorbed accordingly.

In addition, when an impact force is input to the seat cushion pad 16 through the seated occupant P and the seat cushion pad 16 bends downward, the air in the cavity 30 is compressed, and the impact on the seated occupant P is absorbed (attenuated) accordingly.

With the above-described configuration, this embodiment can further suppress bottoming out of the seat cushion 12. As a result, this embodiment can further reduce the thickness of the seat cushion pad 16. In other words, in this embodiment, even if the seat cushion pad 16 is made thinner, the hollow portion 30 allows for a deformation stroke of the seat cushion pad 16, thereby suppressing bottoming out of the seat cushion 12.

In addition, in this embodiment, the resilience modulus of the seat cushion pad 16, the cavity 30, and the bottoming out suppression member 28 is lower in the cavity 30 than in the seat cushion pad 16 and the bottoming out suppression member 28 (strictly speaking, the seat cushion pad 16 ≧ the bottoming out suppression member 28 > the cavity 30). In other words, the hardness of the cavity 30 is lower than that of the seat cushion pad 16 and the bottoming out suppression member 28, and the cavity 30 is the softest layer compared to the others.

Therefore, even if a material with a high resilience (hardness) is used as the seat cushion pad 16, it is possible to ensure a sufficient amount of deflection through the cavity 30. Note that instead of EPP, so-called soft shock absorbing materials such as resin silicone rubber, soft rubber sheets such as low-resilience chloroprene rubber, urethane foam, and foamed resin sheets (polyethylene foam, etc.) may be used as the bottoming out suppression member 28. In this case, the hardness of the seat cushion pad 16 can be further increased.

Here, by increasing the hardness of the seat cushion pad 16, in this embodiment, the seated occupant P feels held by the seat cushion pad 16, preventing the body from shaking and ensuring a comfortable sitting experience, compared to when the hardness of the seat cushion pad 16 is low. On the other hand, when an impact load is input (so-called a large input), the impact is absorbed by the seat cushion pad 16 abutting against the bottoming out suppression member 28, which has a low resilience modulus (low hardness), and the seated occupant P can be gently received.

For example, as a comparative example (not shown), if shock is to be absorbed only by the seat cushion pad 16, it becomes necessary to ensure a deformation stroke of the seat cushion pad 16. In this case, the hardness of the seat cushion pad 16 is reduced to make the seat cushion pad 16 softer. However, in this case, the seat cushion pad 16 becomes less comfortable to sit on. Note that if the hardness of the seat cushion pad 16 is too high, the seat cushion pad 16 also becomes less comfortable to sit on.

In contrast, in this embodiment, a cavity 30 is provided below the seat cushion pad 16. The cavity 30 has a lower resilience modulus than the seat cushion pad 16, so the cavity 30 makes it possible to ensure the deformation stroke of the seat cushion pad 16. In addition, when the seat cushion pad 16 bends toward the cavity 30, the air inside the cavity 30 is compressed, which cushions (damps) the impact on the seated occupant P.

In other words, in this embodiment, it is possible to shorten the deformation stroke of the seat cushion pad 16 compared to a case in which the hollow portion 30 is not provided. In other words, in this embodiment, it is possible to realize the use of a hard seat cushion pad 16 with cushioning properties while ensuring the deformation stroke.

In this embodiment, the impact on the seated occupant P is absorbed and bottoming out of the seat cushion pad 16 is suppressed by the flexural deformation of the seat cushion pad 16, the compression of the air in the cavity 30, the compressive deformation of the bottoming out suppression member 28, etc. Therefore, in this embodiment, bottoming out can be suppressed even if the seat cushion pad 16 is made thinner.

As a comparative example, as shown in FIG. 3(A), for example, when the hollow portion 30 (see FIG. 3(B)) does not exist, that is, when the seat cushion pad 100 and the bottoming out suppression member 102 are in contact, when a large input is applied, a sliding direction (direction of arrow A) along the contact surface where the seat cushion pad 100 and the bottoming out suppression member 102 are in contact due to the load F, a so-called phase shift occurs due to the frictional force generated between the seat cushion pad 100 and the bottoming out suppression member 102, and a force is generated to lift the bottoming out suppression member 102, and there is a possibility of unexpected deformation occurring. In such a case, the occupant feels uncomfortable and the ride comfort is deteriorated.

In contrast, in this embodiment, as shown in FIG. 3B, a hollow portion 30 is provided between the seat cushion pad 16 and the bottoming out prevention member 28, so that when a large input is applied, only the input portion 20A that is deformed by the load F comes into contact with the bottoming out prevention member 28, and the load can be moved smoothly in the direction of the arrow A. This makes it possible to ensure a comfortable ride without causing discomfort to the occupants.

<Modifications of this embodiment>
2, in this embodiment, the seat cushion 12 has a three-layer structure including the seat cushion pad 16, a hollow portion 30, and a bottoming-out suppression member 28 on the seat lower side of the buttocks P1 of the seated occupant P, and the hollow portion 30 is set to have a lower rebound elasticity than the seat cushion pad 16 and the bottoming-out suppression member 28, but is not limited to this structure. In the following description of the modified example, the same reference numerals are used for members that are substantially the same as those in this embodiment, and description thereof will be omitted.

(Variation 1)
For example, in the first modification, as shown in Fig. 4, a soft member (buffer) 38 is provided in the cavity 30 (see Fig. 2) in the opening 26 formed in the structural member 24 of the seat cushion 36. For example, urethane foam, soft rubber, cotton material, cloth material, etc. are used as the soft member 38, and the resilience modulus of the soft member 38 is set to be lower than that of the seat cushion pad 16 and the bottoming out suppression member 28 (strictly speaking, seat cushion pad 16 ≥ bottoming out suppression member 28 > soft member 38).

In other words, a soft member 38 may be used in the hollow portion 30 (see FIG. 2) as long as it has a lower resilience modulus than the bottoming out prevention member 28. In the first modification, the buffer portion is formed by a soft member 38 having a lower resilience modulus than the bottoming out prevention member.

In this way, by providing the soft member 38 inside the cavity 30, when an impact force is input to the seat cushion pad 16 through the seated occupant P and the seat cushion pad 16 bends downward, the impact is absorbed by the seat cushion pad 16 and the soft member 38 deforms in the compression direction, thereby also absorbing the impact on the seated occupant P.

The soft member 38 has a higher resilience than the hollow portion 30, and is therefore harder than the hollow portion 30. However, the soft member 38 itself can absorb shock, so the amount of deformation of the seat cushion pad 16 when seated can be adjusted, allowing for more precise posture and seating comfort adjustments.

(Variation 2)
In addition, in the present embodiment shown in FIG. 2, the resilience modulus of the seat cushion pad 16, the hollow portion 30, and the bottoming out prevention member 28 is set so that the seat cushion pad 16 ≧ the bottoming out prevention member 28 > the hollow portion 30, but this is not limited to this.

For example, as a second modification, the bottoming out prevention member 28 may be set to be greater than the seat cushion pad 16 and greater than the hollow portion 30. For example, the seat cushion pad 16 may be set to have a lower resilience modulus than the bottoming out prevention member 28, thereby making the seat cushion pad 16 softer than the bottoming out prevention member 28.

In other words, the seat cushion 12 can be made soft on the seating surface side to improve vibration absorption. This improves the distribution of body pressure and the soft feel of the surface, and the seat cushion pad 16 can bend softly even in high load areas to prevent bottoming out.

In the second modification, the bottoming out prevention member 28 has a higher hardness than the seat cushion pad 16, so that the hip point HP of the seated occupant P can be secured. In addition, by making the bottoming out prevention member 28 higher in resilience (stronger in resilience) than the seat cushion pad 16, the phase shift that occurs between the seat cushion pad 16 and the bottoming out prevention member 28 during a large input is reduced, and the discomfort transmitted to the seat cushion 12 when the vehicle goes over a step or the like is reduced.

(Variation 3)
Although the vehicle seat 10 in this embodiment is applied to a rear seat, it may be applied to a front seat 40 as shown in Fig. 5. In the case of the front seat 40, a cushion pan 46 may be attached to a cushion frame 44 at the lower end of the seat cushion 42 as shown in Fig. 6.

The cushion pan 46 is made of a metal such as steel plate or aluminum alloy, and is shaped like a shallow rectangular dish overall. By providing the cushion pan 46 in this way, good body pressure distribution is always achieved in the front seat 40, improving seating comfort. However, the cushion pan 46 is not necessarily required in the front seat 40.

In the third modification, a bottoming out prevention member 28 is provided on the cushion pan 46. In this case, the cushion pan 46 is provided with a protrusion 46C or the like that protrudes inward on the bottom surface 46B side of the side wall 46A of the cushion pan 46, and the bottoming out prevention member 28 is set to fit between the protrusion 46C and the bottom surface 46B, thereby making it possible to prevent the bottoming out prevention member 28 from shifting.

A hollow portion 30 is provided between the bottoming out prevention member 28 and the seat cushion pad 16 on the upper side of the seat. This makes it possible to obtain a deformation stroke of the seat cushion pad 16 in the hollow portion 30 even if the seat cushion pad 16 becomes thin, and allows the hip point to be aligned while the repulsive force of the seat cushion pad 16 is set as desired. In addition, bottoming out can be suppressed during large inputs.

A spring member (not shown) capable of absorbing impacts on the seated occupant P may be provided within the hollow portion 30. This spring member can further absorb the impacts on the seated occupant P. Here, the spring member may be a rubber-coated metal spring, a mesh spring, or the like, and suppresses the generation of abnormal noises due to contact between metals.

Although not shown, felt or the like may be provided on the back surface of the seat cushion pad 16. By providing a felt material in this way, friction with the seat cushion pad 16 can be reduced and the rigidity of the seat cushion pad 16 can be improved.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and can be implemented in various other modified forms without departing from the spirit of the invention. It goes without saying that the scope of the rights of the present invention is not limited to the above embodiment.

10 Vehicle seat 12 Seat cushion (seat cushion body)
16 Seat cushion pad (padding material)
24 Structural member (support member)
26 Opening 28 Bottoming out prevention member 30 Hollow portion (buffer portion)
36 Seat cushion 38 Soft member (buffer part)
40 Front seat 42 Seat cushion 44 Cushion frame 46 Cushion pan P Seated occupant P1 Buttocks P2 Thighs

Claims (8)

a padding material constituting at least the upper seat side of a seat cushion main body that supports the buttocks and thighs of a seated occupant;
a bottoming-out suppression member that is provided at a distance from the seat below the buttocks of the seated occupant and at a seat below the pad material and that suppresses bottoming out of the seat cushion body;
a cushioning portion provided below the seat bottom of the seated occupant's buttocks and between the padding and the bottoming out suppression member, the cushioning portion being capable of cushioning an impact on the seated occupant;
A seat cushion equipped with A support member is provided on the seat cushion body and supports the pad material from a lower side of the seat.
2. The seat cushion according to claim 1, wherein an opening is formed in the support member below the seat of the seated occupant's buttocks, and the buffer portion and the bottoming out prevention member are provided inside the opening. The seat cushion according to claim 1, wherein the resilience modulus of the pad material, the buffer part, and the bottoming out prevention member is set so that the buffer part is lower than that of the pad material and the bottoming out prevention member. The seat cushion according to claim 1, wherein the buffer portion is a hollow portion formed between the pad material and the bottoming out prevention member. The seat cushion according to claim 4, further comprising a spring member provided within the cavity that can absorb impacts on the seated occupant. The seat cushion according to claim 1, wherein the buffer portion is formed of a soft material having a smaller resilience than the bottoming out prevention member. The seat cushion according to claim 1, in which the padding is supported from the underside of the seat by a cushion pan attached to a cushion frame that is a framework member of the front seat. A seat cushion according to any one of claims 1 to 7,
a seat back that supports the back of the seated occupant from a rear side of the seat;
A vehicle seat comprising: