JP7769255B2 - Vehicle seats - Google Patents

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat that can absorb the impact exerted on the seated occupant in the event of an impact such as a collision.

When a moving vehicle is involved in a frontal collision, the submarine phenomenon can occur, in which the body of a seated occupant (passenger) restrained by a seat belt slides forward and downward on the surface of the seat. One known measure to prevent the submarine phenomenon is a vehicle seat equipped with an occupant protection device, as described in Patent Document 1, in which an airbag is provided between the seat cushion and a base plate, with an impact-absorbing member interposed between the airbag and the seat cushion.

In the vehicle seat disclosed in Patent Document 1, in the event of a vehicle collision, the airbag inflates, pushing up the seat cushion, compressing and hardening it, preventing the occupant from submarining. Even if the occupant is pressed hard against the front of the seat cushion, the impact absorbing material undergoes plastic deformation to absorb the impact.

Japanese Patent Application Laid-Open No. 2001-239872

In the vehicle seat described in Patent Document 1, the airbag and impact absorbing member are arranged so as to overlap in the vertical direction, which increases the vertical size of the seat cushion.

The present invention was made in consideration of the above-mentioned problems, and its purpose is to provide a vehicle seat that appropriately absorbs the impact on the seated occupant in the event of a collision or other impact, while preventing the seat cushion from becoming too large.

The above-mentioned problem is solved by a vehicle seat according to the present invention, which provides a vehicle seat including a seat cushion, the seat cushion including a seat cushion frame, a seat cushion pad placed on the seat cushion frame, an impact absorbing member provided below the seat cushion pad, and an airbag module accommodated in an accommodating recess formed in the impact absorbing member, the impact absorbing member being supported from below by a support member, the impact absorbing member being configured to be more easily deformed than the support member , and the impact The storage recess of the absorption member has a front wall and a rear wall extending in the up-and-down direction and the seat width direction of the vehicle seat, a bottom wall extending in the front-and-rear direction and the seat width direction of the vehicle seat and connecting the front wall and the rear wall, and a pair of side walls extending in the up-and-down direction and the front-and-rear direction and spaced apart in the seat width direction, the inflator of the airbag module is attached to the bottom wall, the rear wall extends upward from the rear end of the bottom wall to cover the inflator from behind, and the support member supports the bottom wall from below .

In the vehicle seat of the present invention configured as described above, the airbag is stored in the storage recess of the impact absorbing member, thereby preventing the seat cushion from becoming larger in size in the vertical direction. Furthermore, since the impact absorbing member is more easily deformed than the support member, the impact absorbing effect is stably exhibited. Furthermore, the airbag is protected by being stored in the storage recess, and the ease of assembly to the impact absorbing member is improved. Furthermore, the front wall makes it possible to easily control the forward deployment of the airbag. Furthermore, the rear wall makes it possible to easily control the rearward deployment of the airbag. Furthermore, the side walls make it possible to easily control the lateral deployment of the airbag.

In the above configuration, the support member may have a support surface that supports the bottom wall and the inflator from below .

In the above configuration, the impact absorbing member may be plastically deformed when a load equal to or greater than the deployment load of the airbag of the airbag module is input.
In the above configuration, the impact absorption performance is improved while suppressing the influence on the deployment of the airbag.

In the above configuration, the seat cushion pad may be covered with a skin member, and the impact absorbing member may include a skin fixing portion for fixing the skin member.
In the above-described configuration, the skin member is fixed to the skin fixing portion of the impact absorbing member, so that the degree of freedom in design is improved and the ease of assembly is improved.
In the above configuration, the skin fixing portion may be formed at the front end of the impact absorbing member and have an engagement recess recessed upward, and a hook member attached to the front end of the skin of the skin member may be engaged with the engagement recess.
In the above configuration, the skin fixing portion may be formed on a side end of the impact absorbing member and have a side end recess recessed upward, and a side hook member attached to the skin side end of the skin member may be engaged with the side end recess.

In the above configuration, a skin attachment portion that is attached to the skin fixing portion may be provided at an end of the skin member, and the skin attachment portion may be detached from the skin fixing portion when the airbag of the airbag module is deployed.
In the above configuration, the skin attachment portion detaches from the skin fixing portion of the impact absorbing member when the airbag is deployed, thereby reducing the impact on the deployment of the airbag and improving the degree of freedom in setting the deployment of the airbag.

The seat cushion pad has a pad recess formed in its lower surface, and a part of the upper surface of the impact absorbing member is housed in the pad recess.
In the above configuration, the impact absorbing member is housed in the recess of the seat cushion pad, which reduces the compressive load on the seat cushion pad and improves the ease of assembling the impact absorbing member to the seat cushion pad.

In the above configuration, the impact absorbing member may be provided with a frame attachment portion for attachment to the seat cushion frame.
In the above-described configuration, the impact absorbing member is fixed to the seat cushion frame, so that the impact absorbing member can be easily positioned, improving the ease of assembly.
Furthermore, in the above configuration, it is preferable that the vehicle seat includes the seat cushion, a seat back, and a headrest disposed on an upper portion of the seat back, the seat cushion being configured by placing the seat cushion pad on the seat cushion frame and covering the seat cushion pad with a skin member, the seat back being configured by placing a cushion pad on the seat back frame and covering the cushion pad with the skin member, and the headrest being configured by placing a pad material on a core material and covering the pad material with the skin member.

According to the vehicle seat of the present invention, the airbag is stored in the storage recess of the impact absorbing member, which prevents the seat cushion from becoming larger in the vertical direction. Also, since the impact absorbing member is more easily deformed than the support member, the impact absorbing effect is stably exhibited. Furthermore, the airbag is protected by being stored in the storage recess, and the assembly to the impact absorbing member is also improved.
Furthermore, according to the vehicle seat of the present invention, the forward deployment of the airbag can be easily controlled by the front wall.
Furthermore, according to the vehicle seat of the present invention, the rear wall makes it possible to easily control the rearward deployment of the airbag.
Furthermore, according to the vehicle seat of the present invention, the sidewalls can easily control the lateral deployment of the airbag.
Furthermore, with the vehicle seat of the present invention, the above-described configuration improves impact absorption while suppressing the influence on the deployment of the airbag.
Furthermore, according to the vehicle seat of the present invention, the cover member is fixed to the cover fixing portion of the impact absorbing member, which improves the degree of freedom in design and improves the ease of assembly.
Furthermore, according to the vehicle seat of the present invention, when the airbag is deployed, the skin attachment portion detaches from the skin fixing portion of the impact absorbing member, thereby suppressing the influence on the deployment of the airbag and improving the degree of freedom in setting the deployment of the airbag .
In addition , according to the vehicle seat of the present invention, the impact absorbing member is stored in a recess in the seat cushion pad, which suppresses the application of compressive load to the seat cushion pad and improves the ease of assembling the impact absorbing member to the seat cushion pad.
Furthermore, according to the vehicle seat of the present invention, the impact absorbing member is fixed to the seat cushion frame, so that the impact absorbing member can be easily positioned, improving the ease of assembly.

1 is an external view of a vehicle seat according to a first embodiment of the present invention; 1 is an external view of a seat frame included in a vehicle seat according to a first embodiment of the present invention. 1 is an external view of an impact absorbing member and an airbag module provided in a vehicle seat according to a first embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, illustrating the structure around an impact absorbing member provided in the vehicle seat according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line BB in FIG. 1, and is an explanatory diagram showing the structure around the impact absorbing member provided in the vehicle seat according to the first embodiment of the present invention. FIG. 2 is a schematic diagram corresponding to the cross-sectional view taken along line BB in FIG. 1, illustrating the deformation of the impact absorbing member when the airbag is deployed. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, illustrating the structure around an impact absorbing member provided in the vehicle seat according to the first embodiment of the present invention. FIG. FIG. 4 is an external view of a vehicle seat according to a second embodiment of the present invention. 6A and 6B are schematic diagrams showing a seat cushion frame and an impact absorbing member in a vehicle seat according to a second embodiment of the present invention. FIG. 10 is an external view of an impact absorbing member provided in a vehicle seat according to a second embodiment of the present invention. FIG. 10 is an external view of an impact absorbing member provided in a vehicle seat according to a second embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of a shock absorbing member according to a modified example. 10 is a schematic cross-sectional view showing the positional relationship between an impact absorbing member and a seat cushion pad according to a modified example. FIG.

Vehicle seats according to first and second embodiments of the present invention (hereinafter referred to as the present embodiments) will be described below with reference to Figures 1 to 13. The vehicle seat according to the present embodiments will be described using a vehicle seat mounted on a vehicle as an example. However, the present invention is not limited to vehicle seats mounted on wheeled ground vehicles such as automobiles and trains, and may also be seats mounted on aircraft, ships, and other vehicles that travel other than on land.

The embodiment described below is merely an example intended to facilitate understanding of the present invention and is not intended to limit the scope of the present invention. In other words, the shape, dimensions, arrangement, etc. of the components described below may be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

In this specification, terms indicating directions are defined as shown in Figure 1. Specifically, in the following description, the "front-rear direction" refers to the front-rear direction as seen from the perspective of a person sitting in the vehicle seat, and is the direction that coincides with the direction in which the vehicle is traveling. The "seat width direction" refers to the width direction of the vehicle seat, and coincides with the left-right direction as seen from the perspective of a person sitting in the vehicle seat. Furthermore, the "up-down direction" refers to the height direction of the vehicle seat, and coincides with the up-down direction when the vehicle seat is viewed from the front.

[1. Configuration of the vehicle seat S]
The vehicle seat S according to this embodiment has the appearance shown in Fig. 1. In Fig. 1, a part of the vehicle seat S (specifically, a front corner of the seat cushion S1) is shown with the trim cover S12 removed for convenience of illustration.

The vehicle seat S has as its main components a seat cushion S1, which serves as the seating portion that supports the buttocks of the seated occupant; a seat back S2, which serves as the backrest that supports the back of the seated occupant; and a headrest S3, which is disposed above the seat back S2 and supports the head of the seated occupant. As shown in Figure 2, the vehicle seat S has a seat frame F, whose main components are a seat cushion frame F1 and a seat back frame F2, as its skeleton.

The seat cushion S1 is constructed by placing a seat cushion pad S11 on a seat cushion frame F1, which serves as the skeleton, and then covering the seat cushion pad S11 with a trim cover S12. The seat back S2 is constructed by placing a cushion pad (not shown) on the seat back frame F2 and covering it with a trim cover S12. The headrest S3 is formed by placing a pad material (not shown) on a core material (not shown) and covering it with a trim cover S12. The seat cushion pad S11 of the seat cushion S1 and the seat back pad of the seat back S2 are made of a urethane base material formed by foam molding using urethane foam material.

(Seat cushion frame F1)
2, the seat cushion frame F1 has a pair of side frames 11 arranged spaced apart on the left and right, a pan frame 12 connecting the front ends of the pair of side frames 11, and a connecting pipe 13 connecting the rear ends of the pair of side frames 11, all of which are joined together by welding or the like to form a frame. The side frames 11 and the pan frame 12 are formed by pressing metal plate or the like, and the connecting pipe 13 is formed from a metal pipe.

As shown in FIG. 2, the seat cushion frame F1 of this embodiment is provided with a submarine pipe 14 to prevent the submarine phenomenon, in which the body of an occupant seated in the vehicle seat S slides forward and downward in the event of a frontal vehicle collision. The submarine pipe 14 is provided between the left and right side frames 11.

Furthermore, multiple seat springs 15 serving as pressure-receiving members are installed between the connecting pipe 13 of the seat cushion frame F1 and the submarine pipe 14. Specifically, three seat springs 15 are arranged side by side in the seat width direction, and the front end of each seat spring 15 is hooked to the submarine pipe 14 and the rear end is hooked to the connecting pipe 13, so that the seat is installed in the fore-and-aft direction (in other words, the direction perpendicular to the seat width direction).

[2. Seat cushion of first embodiment]
2 to 7, the configuration of the seat cushion S1 of the vehicle seat S according to the first embodiment of the present invention will be described in detail. The seat cushion S1 according to this embodiment includes a seat cushion frame F1, a seat cushion pad S11 placed on the seat cushion frame F1, an impact absorbing member 20 provided below the seat cushion pad S11, and an airbag module 30.

(Impact absorbing member 20)
3 to 5, the impact absorbing member 20 is provided below the seat cushion pad S11. The impact absorbing member 20 is provided with a storage recess 21 and a support recess 22 that are recessed downward from the top surface. The storage recess 21 and the support recess 22 store an inflator 31 and an airbag 32 of an airbag module 30, which will be described later.

The storage recess 21 has a front wall 21a and a rear wall 21b that extend in the up-down direction and the seat width direction. The storage recess 21 also has a bottom wall 21c that extends in the front-to-rear direction and the seat width direction. Furthermore, the storage recess 21 has a pair of side walls 21d that are spaced apart in the seat width direction, and the side walls 21d extend in the front-to-rear and up-down directions.

The impact absorbing member 20 has an upwardly recessed engagement recess 23a formed in the front end 23, which engages with a latch member F attached to the trim front end S12a of the trim cover S12 (Figure 4). The impact absorbing member 20 also has an upwardly recessed side end recess 24a formed in the side end 24 that forms the side surface, which engages with a latch member F attached to the trim side end S12b of the trim cover S12 (Figure 5).

(Airbag module 30)
3 to 5, an airbag module 30 serving as an airbag device is disposed in the storage recess 21 and the support recess 22 of the impact absorbing member 20. The airbag module 30 is a caseless airbag module that does not have a module case. The airbag module 30 includes an inflator 31 and an airbag 32.

The inflator 31 is cylindrical and is fixed to the impact absorbing member 20 and the seat cushion frame F1 by bolts 31a extending downward from the outer periphery of the inflator 31 and nuts 31b corresponding to the bolts 31a.

More specifically, the bolt 31a passes through the bottom wall 21c of the storage recess 21 formed in the impact absorbing member 20 and the pan frame 12, which is part of the seat cushion frame F1, and is fixed by attaching a nut 31b to the end of the bolt (Figures 4 and 5). Note that the inflator 31 may also be fixed to the impact absorbing member 20 and the seat cushion frame F1 using an inflator mounting member other than a bolt.

The inflator 31 is a device that generates gas when it receives an activation signal from a sensor (not shown) that detects a vehicle collision. The generated gas is injected into the airbag 32, causing the airbag 32 to expand and deploy. In this embodiment, the airbag module 30 is configured as a caseless module, but this is not limited to this and the module may also be configured with a module case.

The impact absorbing member 20 is supported from below by the seat cushion frame F1. More specifically, the impact absorbing member 20 is supported from below by the pan frame 12, below the seat cushion pad S11. The impact absorbing member 20 is configured to be more easily deformed than the pan frame 12, which is its supporting member.

The impact absorbing member 20 may be configured to collapse and absorb impact when a certain load is exceeded, and may be, for example, a blow-molded resin product with an internal cavity. Note that the impact absorbing member 20 is not limited to blow-molded products, and may also be a urethane molded product that is harder than the urethane seat cushion pad S11 and has an internal cavity that collapses and absorbs impact when a certain load is exceeded.

As shown in Figure 4, in the seat longitudinal direction, the frame front end 12a of the pan frame 12 is received and positioned in a receiving recess 23b formed in front of the impact absorbing member 20. Also, as shown in Figure 5, in the seat width direction, the frame side end 12b of the pan frame 12 is received and positioned in a side end recess 24a formed in the side end 24 of the impact absorbing member 20.

The inflator 31 and airbag 32 of the airbag module 30 are housed in a storage recess 21 and a support recess 22, which are recesses formed in the impact absorbing member 20. The inflator 31 is housed in the storage recess 21, and the portion of the airbag 32 located rearward of the inflator 31 rests on the support recess 22 (Figure 4).

As shown in Figure 4, in the vertical direction, the airbag module 30 is positioned between the recesses (storage recess 21 and support recess 22) of the impact absorbing member 20 provided below and the underside S11a of the seat cushion pad S11 provided above.

When the vehicle crashes head-on, the airbag 32 expands due to gas ejected from the inflator 31 and pushes up the seat cushion pad S11 from its front end to a specified area toward the center, preventing the occupant seated on the seat cushion S1 from moving forward. When this happens, the occupant's buttocks or thighs are pressed firmly against the seat cushion pad S11, which has been pushed up by the inflation of the airbag 32. If a pressure greater than a specified value is applied to the impact absorbing member 20 located below the seat cushion pad S11 and the airbag 32, the impact absorbing member 20 undergoes plastic deformation and collapses, absorbing the impact. In this way, the load on the occupant during a head-on collision is reduced.

In the vehicle seat S of this embodiment, the airbag module 30 is stored in a storage recess 21 and a support recess 22 formed in the impact absorbing member 20, and the impact absorbing member 20 is configured to be more easily deformed than the pan frame 12 serving as a support member. In the vehicle seat S configured in this manner, storing the airbag module 30 in the recess of the impact absorbing member 20 prevents the seat cushion S1 from becoming larger in size in the vertical direction. Furthermore, because the impact absorbing member 20 is more easily deformed than the pan frame 12 serving as a support member, the impact absorption effect is stably exerted. Furthermore, storing the airbag module 30 in the recess protects it, improving the ease of assembly of the airbag module 30 to the impact absorbing member 20.

The storage recess 21 has a front wall 21a that restricts the deployment direction of the airbag 32, making it possible to easily control the forward deployment of the airbag 32. Furthermore, the storage recess 21 has a rear wall 21b that restricts the deployment direction of the airbag 32, making it possible to easily control the rearward deployment of the airbag 32. Furthermore, the storage recess 21 has a side wall 21d that restricts the deployment direction of the airbag 32, making it possible to easily control the lateral deployment of the airbag 32.

As shown in Figure 6, the impact absorbing member 20 is configured to undergo plastic deformation when a load equal to or greater than the deployment load of the airbag 32 is input, thereby improving impact absorption while minimizing the impact on the deployment of the airbag 32.

The seat cushion pad S11 is covered by a trim cover S12, and the impact absorbing member 20 has engagement recesses 23a and side end recesses 24a (skin fixing portions) for fixing the ends of the trim cover S12 (trim front end S12a and trim side end S12b). With this configuration, the ends of the trim cover S12 are fixed to the skin fixing portions of the impact absorbing member 20, improving design flexibility and ease of assembly.

Furthermore, the trim front end S12a of the trim cover S12 is provided with a latch member F (skin mounting portion) that attaches to the engagement recess 23a, and the trim side end S12b of the trim cover S12 is provided with a latch member F (skin mounting portion) that attaches to the side end recess 24a. The latch member F is designed to disengage from the engagement recess 23a and the side end recess 24a when the airbag 32 deploys (Figure 6). More specifically, when the airbag 32 deploys, the impact absorbing member 20 flexes and collapses, causing the trim cover S12 to rotate in a direction that disengages (specifically, outward in the seat width direction and upward in the seat vertical direction). This configuration reduces the impact on the deployment of the airbag 32 and improves the flexibility of the airbag 32 deployment settings.

The impact absorbing member 20 has a receiving recess 23b at its front end and a side end recess 24a at its side end as frame mounting portions for attaching it to the pan frame 12 that constitutes the seat cushion frame F1. With this configuration, the impact absorbing member 20 is fixed in a predetermined positional relationship with respect to the seat cushion frame F1, making it easier to position the impact absorbing member 20 on the seat cushion S1 and improving assembly.

The shape and position of the impact absorbing member 20 are not limited. For example, as shown in FIG. 7, the support recess 22 may be inclined rearward, and a portion of the upper surface of the impact absorbing member 20 may be housed in a pad recess S11b formed in the underside S11a of the seat cushion pad S11. In this configuration, the impact absorbing member 20 is housed in the pad recess S11b, which reduces the compressive load on the seat cushion pad S11 and improves the assembly of the impact absorbing member 20 to the seat cushion pad S11. Furthermore, by arranging the airbag 32 on the inclined surface of the impact absorbing member 20, it is possible to prevent the occupant from moving forward in the event of a frontal collision.

The impact absorbing member 20 is also located adjacent to the submarine pipe 14, which acts as a sinking prevention member to prevent the seated occupant from sinking (Figure 7), making it easier to position the impact absorbing member 20 and improving assembly. Because the impact absorbing member 20 is positioned directly above the submarine pipe 14, which extends in the seat width direction, the load generated when absorbing an impact is appropriately transmitted from the impact absorbing member 20 to the submarine pipe 14.

[3. Vehicle seat of second embodiment]
The configuration of a vehicle seat S according to a second embodiment of the present invention will be described with reference to Figures 8 to 11. In the following description, the points in common with the first embodiment will be omitted and differences will be mainly described. As the vehicle seat according to the second embodiment, a rear seat mounted on a vehicle will be described as an example. However, the vehicle seat is not limited to a rear seat mounted on a ground vehicle having wheels such as an automobile or train, and may also be a front seat for a vehicle, a second-row seat in a three-row seat system, or a seat mounted on an aircraft or ship that moves other than on land.

As shown in Figures 8 and 9, the impact absorbing member 20 is positioned between the pair of side frames 11 in the seat width direction, avoiding the hanging portions T1 to T3 of the trim cover S12. Specifically, in a top view of the seat cushion S1, the impact absorbing member 20 is positioned between the first hanging portion T1 (right side hanging portion) and the second hanging portion T2 (left side hanging portion) in the seat width direction, and is positioned forward of the third hanging portion T3 (rear side hanging portion) in the seat fore-and-aft direction. With this configuration, the influence of the hanging portions T1 to T3 is reduced when a load is transmitted to the impact absorbing member 20 during impact absorption.

The lower surface 122 of the impact absorbing member 120 is supported from below by the seat cushion frame F1 and the vehicle floor (supporting member). The supporting member that supports the impact absorbing member 120 is not particularly limited, and examples include a frame member such as the pan frame 12, and a pressure-receiving member such as the seat spring 15.

As shown in FIG. 10, the impact absorbing member 120 has a first recess 123 between its upper surface 121 and lower surface 122 as a storage recess. The upper surface 121 of the impact absorbing member 120 has an inclined surface 121a that slopes downward toward the rear. The inclined surface 121a has a second recess 124 that is recessed downward. In the example shown in FIG. 10, the second recess 124 is provided as two cylindrical recesses spaced apart in the seat width direction.

The first recess 123 is recessed downward from the upper surface 121 and includes a front wall 123a and a rear wall 123b extending in the up-down direction and the seat width direction, a bottom wall 123c extending in the front-to-rear direction and the seat width direction, and a pair of side walls 123d spaced apart in the seat width direction. The side walls 123d extend in the front-to-rear and up-down directions.

The number and shape of the second recesses 124 are not limited to the example shown in Figure 10. For example, as shown in Figure 11, the second recesses 124 may be recesses with oval bottom surfaces extending in the seat width direction.

The airbag module 30 is housed in the first recess 123, with the inflator 31 extending in the seat width direction. A portion of the upper surface 121 of the impact absorbing member 120 is housed in a pad recess S11b formed in the lower surface S11a of the seat cushion pad S11. In this case, it is preferable to position the airbag 32 on the inclined surface 121a of the impact absorbing member 120, as this makes it possible to suppress forward movement of the occupant in the event of a frontal collision.

4. Modifications
The present invention is not limited to the above-described embodiment. Modifications of the impact absorbing member and seat cushion according to this embodiment will be described below with reference to Figures 12 and 13. In the following description, the points in common with the above-described embodiment will be omitted, and the differences will be mainly described.

Figure 12 is a schematic cross-sectional view of a modified impact absorbing member 220, and Figure 13 is a schematic cross-sectional view showing the positional relationship between the impact absorbing member 220, the seat cushion pad S11, and the seat cushion frame F1.

The shock absorbing member 220 is a blow-molded resin product, and by appropriately setting its outer shape and the number and arrangement of recesses (cavities), it is possible to adjust the load value when it collapses and absorbs shock.

As shown in FIG. 12, the impact absorbing member 220 has a first recess 223a and a second recess 223b that are open on the upper surface 221, and a third recess 224a and a fourth recess 224b that are open on the lower surface 222. Here, the first recess 223a, the second recess 223b, the third recess 224a, and the fourth recess 224b have rounded corners.

The impact absorbing member 220 is disposed between a pair of side frames 11 in the seat width direction, similar to the impact absorbing member 120 in Figure 10. In other words, the first recess 223a and the third recess 224a are located in front of the occupant's seating area.

As shown in FIG. 13, the lower surface 222 of the impact absorbing member 220 is supported from below by the seat cushion frame F1 and the vehicle floor (support member). The airbag module 30 is housed in the first recess 223a and the third recess 224a, with the inflator 31 extending in the seat width direction. A portion of the upper surface 221 of the impact absorbing member 220 is housed in a pad recess S11b formed in the lower surface S11a of the seat cushion pad S11.

The vehicle seat according to this embodiment has been described above using a vehicle seat as an example. The seat cushion according to this embodiment is not particularly limited in its application, as long as it is a seat cushion for a seat in which an impact may be applied to the seated occupant, particularly a seat cushion for a seat in which the lumbar region of the seated occupant may sink in upon impact. For example, the seat cushion of the present invention can also be used as a seat cushion for a vehicle seat used in a vehicle other than a car.

S Vehicle seat (vehicle seat)
S1 Seat cushion S11 Seat cushion pad S11a Underside S11b Pad recess S12 Trim cover (skin member)
S12a: Front end of trim S12b: Side end of trim F: Hook member (skin attachment part)
T1 First hanging part (right hanging part)
T2 Second hanging part (left hanging part)
T3 Third hanging part (rear hanging part)
S2 Seat back S3 Headrest F Seat frame F1 Seat cushion frame F2 Seat back frame 11 Side frame 12 Pan frame (support member)
12a Frame front end 12b Frame side end 13 Connecting pipe 14 Submarine pipe (sinking prevention member)
15 Seat spring (pressure receiving member, wire member)
20 Impact absorbing member 21 Storage recess 21a Front wall 21b Rear wall 21c Bottom surface 21d Side wall 22 Support recess 23 Front end 23a Engagement recess (skin fixing portion)
23b Receiving recess (frame mounting portion)
24 Side end portion 24a Side end recess portion (skin fixing portion, frame mounting portion)
30 Airbag module 31 Inflator 31a Bolt 31b Nut 32 Airbag 120 Impact absorbing member 121 Upper surface 121a Inclined surface 122 Lower surface 123 First recess 123a Front surface 123b Rear surface 123c Bottom surface 123d Side surface 124 Second recess 220 Impact absorbing member 221 Upper surface 222 Lower surface 223a First recess 223b Second recess 224a Third recess 224b Fourth recess

Claims (10)

A vehicle seat having a seat cushion,
The seat cushion includes a seat cushion frame and
a seat cushion pad placed on the seat cushion frame;
an impact absorbing member provided below the seat cushion pad;
an airbag module accommodated in an accommodation recess formed in the impact absorbing member,
The impact absorbing member is supported from below by a support member,
The impact absorbing member is configured to be more easily deformed than the support member ,
The storage recess of the impact absorbing member is
a front wall and a rear wall extending in a vertical direction and a seat width direction of the vehicle seat;
a bottom wall extending in a front-rear direction and a seat width direction of the vehicle seat and connecting the front wall and the rear wall;
a pair of side walls extending in the up-down direction and the front-rear direction and spaced apart in the seat width direction;
An inflator of the airbag module is attached to the bottom wall,
the rear wall extends upward from the rear end of the bottom wall to cover the inflator from behind;
The vehicle seat , wherein the support member supports the bottom wall from below . 2. The vehicle seat according to claim 1, wherein the support member has a support surface that supports the bottom wall and the inflator from below. 3. The vehicle seat according to claim 1, wherein the impact absorbing member undergoes plastic deformation when a load equal to or greater than the deployment load of the airbag of the airbag module is input. The seat cushion pad is covered with a cover member,
4. The vehicle seat according to claim 1, wherein the impact absorbing member includes a skin fixing portion for fixing the skin member. the skin fixing portion is formed at a front end portion of the impact absorbing member and has an engagement recess recessed upward,
5. The vehicle seat according to claim 4, wherein a hook member attached to a front end of the cover member is engaged with the engaging recess. the skin fixing portion has a side end recess formed at a side end of the impact absorbing member and recessed upward;
6. The vehicle seat according to claim 4, wherein a side hook member attached to a skin-side end of the skin member is engaged with the side end recess. a skin attachment portion that is attached to the skin fixing portion is provided at an end of the skin member,
7. The vehicle seat according to claim 4, wherein the skin attachment portion is detached from the skin fixing portion when the airbag of the airbag module is deployed. The seat cushion pad has a pad recess formed on its underside,
8. The vehicle seat according to claim 1, wherein a part of an upper surface of the impact absorbing member is housed in the pad recess. 9. The vehicle seat according to claim 1, wherein the impact absorbing member is provided with a frame attachment portion for attachment to the seat cushion frame. The vehicle seat includes the seat cushion, a seat back, and a headrest disposed on an upper portion of the seat back,
The seat cushion is configured by placing the seat cushion pad on the seat cushion frame and covering the seat cushion pad with a cover member,
the seat back is configured by placing a cushion pad on a seat back frame and covering the cushion pad with the skin member,
4. The vehicle seat according to claim 1, wherein the headrest is configured by disposing a padding material on a core material and covering the padding material with the cover member.