Vehicle seat

Abstract

To provide a vehicle seat which inhibits enlargement of a seat cushion while being able to properly absorb an impact caused to a seated person when an impact, such as a collision, occurs.SOLUTION: A vehicle seat S includes a seat cushion S1, and the seat cushion S1 includes: a seat cushion frame F1; a seat cushion pad S1 placed on the seat cushion frame F1; an impact absorption member 20 provided below a seat cushion pad S11; and an air bag 30 housed in a storage recessed part 21 formed at the impact absorption member 20. The impact absorption member 20 is supported from below by a pan frame 12 serving as a support member. The impact absorption member 20 is configured to deform more easily than the pan frame 12.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of absorbing shock applied to a seated occupant when an impact such as a collision occurs. [Background technology]

[0002] When a moving vehicle crashes head-on, the submarine phenomenon may 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. As a measure to suppress the submarine phenomenon, for example, as described in Patent Document 1, a vehicle seat equipped with an occupant protection device in which an airbag is provided between a seat cushion and a base plate, and a shock absorbing member is interposed between the airbag and the seat cushion is known.

[0003] In the vehicle seat of Patent Document 1, in the event of a vehicle collision, the airbag inflates and pushes up the seat cushion, compressing and hardening the seat cushion and 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. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-239872 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the vehicle seat described in Patent Document 1, the airbag and the impact absorbing member are arranged to overlap each other in the vertical direction, which increases the size of the seat cushion in the vertical direction.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a vehicle seat that appropriately absorbs the impact exerted on the seat occupant when an impact such as a collision occurs, while preventing the seat cushion from becoming larger. [Means for solving the problem]

[0007] The above problem is solved by the vehicle seat of the present invention, which provides a vehicle seat equipped with a seat cushion, the seat cushion having 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 housed in a storage recess formed in the impact absorbing member, the impact absorbing member being supported from below by a support member, and the impact absorbing member being configured to be more easily deformed than the support member.

[0008] 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, which prevents the seat cushion from becoming large 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.

[0009] In the above configuration, the storage recess of the impact absorbing member may include a front wall extending in the vertical and width directions of the vehicle seat, and the front wall may regulate the deployment direction of the airbag. In the above-described configuration, the front wall makes it possible to easily control the forward deployment of the airbag.

[0010] In the above configuration, the storage recess of the impact absorbing member may include a rear wall extending in the vertical and width directions of the vehicle seat, and the rear wall may regulate the deployment direction of the airbag. In the above-described configuration, the rear wall makes it possible to easily control the rearward deployment of the airbag.

[0011] In the above configuration, the storage recess of the impact absorbing member may have a side wall in a width direction of the vehicle seat, and the side wall may regulate a deployment direction of the airbag. In the above-described configuration, the side walls make it possible to easily control the lateral deployment of the airbag.

[0012] 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 is input. The above-described configuration improves the shock absorbing performance while suppressing the influence on the deployment of the airbag.

[0013] In the above configuration, the seat cushion pad may be covered with a cover member, and the impact absorbing member may include a cover fixing portion for fixing the cover member. In the above-described configuration, since the skin member is fixed to the skin fixing portion of the impact absorbing member, the degree of freedom in design is improved and the ease of assembly is improved.

[0014] 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 deploys. In the above configuration, when the airbag is deployed, the skin attachment portion detaches from the skin fixing portion of the impact absorbing member, thereby reducing the effect on the deployment of the airbag and improving the freedom of design in deploying the airbag.

[0015] In the above configuration, the impact absorbing member may be provided adjacent to a sinking suppression member that suppresses sinking of the seated occupant. In the above-described configuration, since the impact absorbing member is provided adjacent to the sinking suppression member, the impact absorbing member can be easily positioned, and the ease of assembly can be improved.

[0016] The seat cushion pad has a pad recess formed on its lower surface, and a part of the upper surface of the impact absorbing member is housed in the pad recess. In the above-described configuration, since the impact absorbing member is housed in the recess of the seat cushion pad, the application of a compressive load to the seat cushion pad is suppressed, and the ease of assembling the impact absorbing member to the seat cushion pad is improved.

[0017] 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, since the impact absorbing member is fixed to the seat cushion frame, the impact absorbing member can be easily positioned, and the ease of assembly can be improved. Effect of the Invention

[0018] According to the vehicle seat of the present invention, the airbag is stored in the storage recess of the impact absorbing member, so that the size of the seat cushion in the vertical direction is prevented from increasing. 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 assembling 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 rearward deployment of the airbag can be easily controlled by the rear wall. Furthermore, according to the vehicle seat of the present invention, the lateral deployment of the airbag can be easily controlled by the side walls. Furthermore, with the vehicle seat of the present invention, the above-mentioned configuration improves impact absorption while suppressing the effect on the deployment of the airbag. Furthermore, according to the vehicle seat of the present invention, since the cover member is fixed to the cover fixing portion of the impact absorbing member, the degree of freedom in design is improved and the ease of assembly is improved. 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 reducing the effect on the deployment of the airbag and improving the freedom of design for the deployment of the airbag. Furthermore, according to the vehicle seat of the present invention, the impact absorbing member is provided adjacent to the sinking suppression member, so that the impact absorbing member can be easily positioned, improving the ease of assembly. In addition, according to the vehicle seat of the present invention, the impact absorbing member is stored in the recess of the seat cushion pad, thereby suppressing the application of compressive load to the seat cushion pad and improving the assembling ability of the impact absorbing member to the seat cushion pad. Furthermore, according to the vehicle seat of the present invention, since the impact absorbing member is fixed to the seat cushion frame, the impact absorbing member can be easily positioned, improving the ease of assembly. [Brief description of the drawings]

[0019] [Figure 1] 1 is an external view of a vehicle seat according to a first embodiment of the present invention; [Diagram 2] 1 is an external view of a seat frame included in a vehicle seat according to a first embodiment of the present invention. [Diagram 3] 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. [Figure 4] 2 is a cross-sectional view taken along the line AA in FIG. 1, illustrating a structure around an impact absorbing member provided in the vehicle seat according to the first embodiment of the present invention. FIG. [Diagram 5] FIG. 2 is a cross-sectional view taken along the line BB in FIG. 1, illustrating a structure around an impact absorbing member provided in the vehicle seat according to the first embodiment of the present invention. [Figure 6] FIG. 2 is a schematic diagram corresponding to the cross-sectional view taken along the line BB in FIG. 1, illustrating deformation of the impact absorbing member when the airbag is deployed. [Figure 7] 2 is a cross-sectional view taken along the line AA in FIG. 1, illustrating a structure around an impact absorbing member provided in the vehicle seat according to the first embodiment of the present invention. FIG. [Figure 8] FIG. 4 is an external view of a vehicle seat according to a second embodiment of the present invention. [Figure 9] 6 is a schematic diagram showing a seat cushion frame and an impact absorbing member in a vehicle seat according to a second embodiment of the present invention. FIG. [Figure 10] 11 is an external view of an impact absorbing member provided in a vehicle seat according to a second embodiment of the present invention. FIG. [Figure 11] 11 is an external view of an impact absorbing member provided in a vehicle seat according to a second embodiment of the present invention. FIG. [Figure 12] 13 is a schematic cross-sectional view of a shock absorbing member according to a modified example. FIG. [Figure 13] 13 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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, a vehicle seat according to a first and second embodiment of the present invention (hereinafter, the present embodiment) will be described with reference to Fig. 1 to Fig. 13. As the 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 mounted on a ground-traveling vehicle having wheels such as an automobile or a train, and may be a seat mounted on an aircraft, a ship, or the like that moves other than on the ground.

[0021] The embodiment described below is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. In other words, the shapes, dimensions, arrangements, and other aspects 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.

[0022] In this specification, the terms indicating directions are defined as shown in FIG. 1. Specifically, in the following description, the "front-rear direction" means the front-rear direction as seen by a person sitting in the vehicle seat, and is the direction that coincides with the vehicle's traveling direction. The "seat width direction" means the width direction of the vehicle seat, and coincides with the left-right direction as seen by a person sitting in the vehicle seat. Additionally, the "up-down direction" means the height direction of the vehicle seat, and coincides with the up-down direction as seen by the vehicle seat from the front.

[0023] [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 portion of the seat cushion S1) is shown with the trim cover S12 removed for convenience of illustration.

[0024] The vehicle seat S has as its main components a seat cushion S1 that serves as a seating portion that supports the buttocks of a seated person, a seat back S2 that serves as a backrest that supports the back of the seated person, and a headrest S3 that is disposed on the upper portion of the seat back S2 and supports the head of the seated person. As shown in Fig. 2, the vehicle seat S has as its skeleton a seat frame F that has as its main components a seat cushion frame F1 and a seat back frame F2.

[0025] The seat cushion S1 is constructed by placing a seat cushion pad S11 on a seat cushion frame F1, which serves as a framework, and further 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 the trim cover S12. The headrest S3 is formed by disposing a pad material (not shown) on a core material (not shown) and covering it with the trim cover S12. The seat cushion pad S11 of the seat cushion S1 and the seat back pad of the seat back S2 are urethane base materials molded by foam molding using a urethane foam material.

[0026] (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 front ends of the pair of side frames 11, and a connecting pipe 13 connecting rear ends of the pair of side frames 11, 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 a metal plate, and the connecting pipe 13 is formed from a metal pipe.

[0027] 2, the seat cushion frame F1 of this embodiment is provided with a submarine pipe 14 for suppressing the submarine phenomenon in which the body of a person seated in the vehicle seat S slides forward and downward when the vehicle crashes head-on. The submarine pipe 14 is provided between the left and right side frames 11.

[0028] Furthermore, a plurality of 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 springs 15 are installed in the seat front-rear direction (in other words, in the direction perpendicular to the seat width direction).

[0029] [2. Seat cushion of the 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 has 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.

[0030] (shock 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 upper surface. An inflator 31 and an airbag 32 of an airbag module 30, which will be described later, are stored in the storage recess 21 and the support recess 22.

[0031] The storage recess 21 has a front wall 21a and a rear wall 21b extending in the up-down direction and the seat width direction. The storage recess 21 also has a bottom wall 21c extending in the front-rear direction and the seat width direction. The storage recess 21 also has a pair of side walls 21d spaced apart in the seat width direction, and the side walls 21d extend in the front-rear direction and the up-down direction.

[0032] The shock absorbing member 20 has an engagement recess 23a recessed upward at its front end 23, and a latch member F attached to the trim front end S12a of the trim cover S12 engages with the engagement recess 23a (FIG. 4). The shock absorbing member 20 also has a side end recess 24a recessed upward at its side end 24 forming a side surface, and a latch member F attached to the trim side end S12b of the trim cover S12 engages with the side end recess 24a (FIG. 5).

[0033] (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.

[0034] The inflator 31 has a cylindrical shape, 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.

[0035] More specifically, the bolt 31a penetrates the bottom wall 21c of the storage recess 21 formed in the impact absorbing member 20 and the pan frame 12 which is a part of the seat cushion frame F1, and a nut 31b is attached to the tip of the bolt 31a for fixing (FIGS. 4 and 5). The inflator 31 may be fixed to the impact absorbing member 20 and the seat cushion frame F1 by an inflator mounting member other than a bolt.

[0036] 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, and injects the generated gas into the airbag 32 to inflate the airbag 32 so as to deploy it. Note that, although the airbag module 30 is configured as a caseless one in this embodiment, it is not limited to this and may be configured as one that includes a module case.

[0037] The shock absorbing member 20 is supported from below by the seat cushion frame F1. More specifically, the shock absorbing member 20 is supported from below by the pan frame 12 below the seat cushion pad S11. The shock absorbing member 20 is configured to be more easily deformed than the pan frame 12, which is a supporting member.

[0038] The shock absorbing member 20 may be configured to absorb shock by collapsing when a certain load value is exceeded, and may be, for example, a resin blow molded product having a hollow portion inside. Note that the shock absorbing member 20 is not limited to a blow molded product, and may be a urethane molded product having a higher hardness than the seat cushion pad S11, which is a urethane pad, and having a hollow portion so as to absorb shock by collapsing when a certain load value is exceeded.

[0039] As shown in Fig. 4, in the seat front-rear direction, the frame front end 12a of the pan frame 12 is received and disposed in a receiving recess 23b formed in front of the impact absorbing member 20. Also, as shown in Fig. 5, in the seat width direction, the frame side end 12b of the pan frame 12 is received and disposed in a side end recess 24a formed in a side end 24 of the impact absorbing member 20.

[0040] The inflator 31 and the 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 a portion of the airbag 32 arranged rearward of the inflator 31 is placed on the support recess 22 (FIG. 4).

[0041] As shown in FIG. 4, in the vertical direction, the airbag module 30 is disposed between the recesses (storage recess 21 and support recess 22) of the impact absorbing member 20 provided below and the lower surface S11a of the seat cushion pad S11 provided above.

[0042] When the vehicle crashes head-on, the airbag 32 inflated by the gas ejected from the inflator 31 pushes up the seat cushion pad S11 from its front end side to a predetermined area toward the center, preventing the occupant seated on the seat cushion S1 from moving forward. At this time, the occupant's buttocks or thighs are strongly pressed against the seat cushion pad S11 pushed up by the inflation of the airbag 32, and when a pressure of a predetermined value or more is applied to the shock absorbing member 20 arranged below the seat cushion pad S11 and the airbag 32, the shock absorbing member 20 is plastically deformed so as to be crushed, absorbing the shock. In this way, the load applied to the occupant during a head-on collision is reduced.

[0043] In the vehicle seat S of this embodiment, the airbag module 30 is stored in the storage recess 21 and the 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, the airbag module 30 is stored in the recess of the impact absorbing member 20, thereby preventing the size of the seat cushion S1 in the vertical direction from increasing. In addition, since the impact absorbing member 20 is more easily deformed than the pan frame 12 serving as a support member, the impact absorbing effect is stably exhibited. Furthermore, the airbag module 30 is protected by being stored in the recess, and the ease of assembly of the airbag module 30 to the impact absorbing member 20 is also improved.

[0044] The storage recess 21 includes a front wall 21a, which restricts the deployment direction of the airbag 32, thereby making it possible to easily control the forward deployment of the airbag 32. In addition, the storage recess 21 includes a rear wall 21b, which restricts the deployment direction of the airbag 32, thereby making it possible to easily control the rearward deployment of the airbag 32. In addition, the storage recess 21 includes a side wall 21d, which restricts the deployment direction of the airbag 32, thereby making it possible to easily control the lateral deployment of the airbag 32.

[0045] As shown in FIG. 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 the impact absorption properties while suppressing the effect on the deployment of the airbag 32.

[0046] The seat cushion pad S11 is covered with a trim cover S12, and the impact absorbing member 20 has an engagement recess 23a and a side end recess 24a (skin fixing portion) for fixing the ends (trim front end S12a and trim side end S12b) of the trim cover S12. In this configuration, the ends of the trim cover S12 are fixed to the skin fixing portion of the impact absorbing member 20, improving the degree of freedom in setting and the ease of assembly.

[0047] Further, a hook member F (skin mounting portion) attached to the engagement recess 23a is provided at the trim front end S12a of the trim cover S12, and a hook member F (skin mounting portion) attached to the side end recess 24a is provided at the trim side end S12b of the trim cover S12. The hook member F is adapted to come off the engagement recess 23a and the side end recess 24a when the airbag 32 is deployed (FIG. 6). More specifically, when the airbag 32 is deployed, the impact absorbing member 20 is bent and crushed, so that the trim cover S12 rotates in a direction to come off (specifically, outward in the seat width direction and upward in the seat vertical direction). In this configuration, the influence on the deployment of the airbag 32 is suppressed, and the degree of freedom in setting the deployment of the airbag 32 is improved.

[0048] The shock absorbing member 20 is provided with a receiving recess 23b at its front end and a side end recess 24a at its side end as frame mounting portions for mounting the shock absorbing member 20 to the pan frame 12 constituting the seat cushion frame F1. In this configuration, the shock absorbing member 20 is fixed to the seat cushion frame F1 in a predetermined positional relationship, which facilitates positioning of the shock absorbing member 20 in the seat cushion S1 and improves assembly.

[0049] The shape and positional relationship of the impact absorbing member 20 are not limited, and for example, as shown in Fig. 7, the support recess 22 may be inclined toward the rear, and a part of the upper surface of the impact absorbing member 20 may be stored in a pad recess S11b formed in the lower surface S11a of the seat cushion pad S11. In such a configuration, since the impact absorbing member 20 is stored in the pad recess S11b, the application of a compressive load to the seat cushion pad S11 is suppressed, and the assembly of the impact absorbing member 20 to the seat cushion pad S11 is improved. Furthermore, by arranging the airbag 32 on the inclined surface of the impact absorbing member 20, it is possible to suppress the forward movement of the occupant in the event of a frontal collision.

[0050] The shock absorbing member 20 is provided adjacent to the submarine pipe 14, which acts as a sinking suppression member that suppresses sinking of the seated occupant (FIG. 7), making it easy to position the shock absorbing member 20 and improving assembly. At this time, since the shock absorbing member 20 is disposed directly above the submarine pipe 14 that extends in the seat width direction, the load during shock absorption is appropriately transmitted from the shock absorbing member 20 to the submarine pipe 14.

[0051] [3. Vehicle seat according to second embodiment] The configuration of a vehicle seat S according to a second embodiment of the present invention will be described with reference to Figs. 8 to 11. In the following description, the points in common with the first embodiment will be omitted, and the differences will be mainly described. As the vehicle seat according to the second embodiment, a rear seat for a vehicle mounted on a vehicle will be described as an example, but the vehicle seat is not limited to a rear seat for a vehicle mounted on a ground-traveling vehicle having wheels such as an automobile or a train, and may be a front seat for a vehicle, a second-row seat of a three-row seat, or a seat mounted on an aircraft or a ship that moves other than on the ground.

[0052] 8 and 9, the shock absorbing member 20 is disposed between the pair of side frames 11 in the seat width direction, at a position avoiding the hanging portions T1 to T3 of the trim cover S12. Specifically, in a top view of the seat cushion S1, the shock absorbing member 20 is disposed 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 disposed forward of the third hanging portion T3 (rear side hanging portion) in the seat front-rear direction. With this configuration, the influence of the hanging portions T1 to T3 is suppressed when a load is transmitted to the shock absorbing member 20 during shock absorption.

[0053] The lower surface 122 of the impact absorbing member 120 is supported by the seat cushion frame F1 and the vehicle body floor (supporting member) from below. The supporting member that supports the impact absorbing member 120 is not particularly limited, and examples thereof include a frame member such as the pan frame 12, and a pressure-receiving member such as the seat spring 15.

[0054] As shown in Fig. 10, the impact absorbing member 120 is provided with a first recess 123 as a storage recess between an upper surface 121 and a lower surface 122. An inclined surface 121a that slopes downward toward the rear is formed on the upper surface 121 of the impact absorbing member 120. A second recess 124 that is recessed downward is formed on the inclined surface 121a. In the example shown in Fig. 10, the second recess 124 is provided as two cylindrical recesses spaced apart in the seat width direction.

[0055] 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-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-rear direction and the up-down direction.

[0056] The number and shape of the second recesses 124 are not limited to the example shown in Fig. 10. For example, as shown in Fig. 11, the second recesses 124 may be provided as recesses whose bottom surfaces extend in the sheet width direction and have an oval shape.

[0057] The airbag module 30 is housed in the first recess 123 such that the inflator 31 extends in the seat width direction. A part 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 dispose the airbag 32 on the inclined surface 121a of the impact absorbing member 120, since this makes it possible to suppress forward movement of the occupant in the event of a frontal collision.

[0058] [4. Modifications] The present invention is not limited to the above embodiment. Below, modified examples of the impact absorbing member and seat cushion according to this embodiment will be described with reference to Fig. 12 and Fig. 13. In the following description, the points in common with the above embodiment will be omitted, and the differences will be mainly described.

[0059] FIG. 12 is a schematic cross-sectional view of an impact absorbing member 220 according to a modified example, and FIG. 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.

[0060] 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 (hollow portions), it is possible to adjust the load value when it collapses and absorbs shock.

[0061] 12, the impact absorbing member 220 includes a first recess 223a and a second recess 223b that are provided so as to open on the upper surface 221, and a third recess 224a and a fourth recess 224b that are provided so as to 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 shapes with rounded corners.

[0062] 10, the impact absorbing member 220 is disposed between a pair of side frames 11 in the seat width direction. In other words, the first recess 223a and the third recess 224a are provided in front of the seating position of the occupant.

[0063] 13, the lower surface 222 of the impact absorbing member 220 is supported by the surfaces of the seat cushion frame F1 and the vehicle body floor (supporting member) from below. The airbag module 30 is housed in the first recess 223a and the third recess 224a such that the inflator 31 extends in the seat width direction. A part 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.

[0064] The vehicle seat according to the present embodiment has been described above by taking a vehicle seat as an example. The seat cushion according to the present embodiment is not particularly limited in its use as long as it is a seat cushion for a seat on which an impact may be applied to a seat occupant, particularly a seat cushion for a seat on which a seat occupant may sink into the lumbar region when an impact occurs. 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 vehicle. [Explanation of symbols]

[0065] S Vehicle seats (vehicle seats) S1 Seat Cushion S11 seat cushion pad S11a bottom side S11b Pad recess S12 Trim cover (skin material) S12a trim front end S12b Trim side end F Hook-fastening 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 Seat frame, front F1 seat cushion frame F2 seat back frame 11 Side frame 12 Pan frame (support member) 12a Front end of frame 12b Frame side end 13 Connecting pipe 14 Submarine pipe (submersion prevention material) 15 Seat spring (pressure receiving member, wire member) 20. Shock absorbing materials 21 Storage recess 21a Front wall 21b Back wall 21c bottom 21d side wall 22 Support recess 23 Front end 23a Engagement recess (skin fixing part) 23b Receiving recess (frame mounting portion) 24 Side edge 24a Side end recess (skin fixing part, frame mounting part) 30 Airbag Module 31 Inflator 31a Bolt 31b Nut 32 Airbag 120 Shock absorbing material 121 Top surface 121a Slope 122 Bottom surface 123 First recess 123a Front 123b Rear 123c bottom 123d side 124 Second recess 220 Shock absorbing materials 221 Top surface 222 Bottom surface 223a First recess 223b Second recess 224a Third recess 224b 4th recess

Claims

1. 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 shock absorbing member is supported from below by a support member, The shock absorbing member is configured to be more deformable than the support member, The storage recess of the shock 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 a 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. A vehicle seat as described in claim 1, characterized in that the support member has a support surface that supports the bottom wall and the inflator from below.

3. 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.

4. 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.

5. The skin fixing portion is formed at a front end portion of the shock 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 portion of the cover member is engaged with the engaging recess.

6. The skin fixing portion is formed on a side end portion of the shock absorbing member and has a side end recess that is 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.

7. a skin attachment portion that is attached to the skin fixing portion is provided at an end portion 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.

8. The seat cushion pad has a pad recess formed on a lower surface thereof, 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. 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.

10. The vehicle seat comprises 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 cover 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.

Images