JP7614529B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat equipped with an airbag module.

Vehicle seats equipped with a side airbag device (airbag module) in the seat back are known (see, for example, Patent Document 1). In the vehicle seat described in Patent Document 1, the side airbag includes a bag portion (upper bag portion) that inflates toward the head of the seated occupant, and a bag portion (lower bag portion) that inflates toward the waist. The vehicle seat is provided with webbing that is sewn at positions corresponding to the upper bag portion and the lower bag portion.

When the airbag deploys, it breaks at the positions corresponding to the upper and lower bag parts. This allows the upper and lower bag parts to inflate and deploy separately, ensuring that the direction of inflation and deployment of each bag part is stably determined.

JP 2008-114637 A

In vehicle seats, the lower part of the seat back is configured to have a greater thickness in the front-rear direction than other parts. Therefore, in the vehicle seat of Patent Document 1, the time it takes for the lower bag part to reach the surface of the seat back after deployment begins is longer than that for the upper bag part, resulting in a problem of delayed deployment of the lower bag part.

In view of the above background, the present invention aims to enable an airbag to reach the surface of a seat back more quickly when deployed in a vehicle seat.

In order to solve the above problem, the vehicle seat (1, 201) has a seat cushion (5) including a seat cushion frame (12), a seat back including a seat back frame (22) connected to the rear of the seat cushion frame and an airbag module (60) connected to the side of the seat back frame on the vehicle exterior side, and a side cover (55) provided on the vehicle exterior side of the seat cushion frame, and is characterized in that an airbag (71) to be deployed from the airbag module includes a lumbar protection section (76) that reaches the side of the seat cushion on the vehicle exterior side when deployed, and a guide surface (96) that guides the lumbar protection section forward when the airbag is deployed is provided on the side cover.

According to this configuration, when the seat back inflates due to the deployment of the airbag and reaches the guide surface, the lumbar protection section is guided to inflate forward. This allows the lumbar protection section to inflate more quickly toward the front edge of the seat back. This allows the lumbar protection section to reach the surface of the seat back more quickly, and the airbag to be deployed at a higher speed in a position corresponding to the occupant's lumbar region.

In the above embodiment, the guide surface may be inclined downward toward the front.

This configuration allows the lumbar protection section to be guided to deploy forward when the airbag is deployed.

In the above embodiment, the guide surface may be curved upwardly and convexly.

This configuration makes it difficult for the side covers to deform when subjected to a load from above. This prevents deformation of the side covers when deployed, and allows the deployment of the lumbar protection section to be properly guided.

In the above embodiment, it is also preferable that the guide surface is connected to a high step (98) on the outside of the vehicle.

This configuration prevents the lumbar protection section from expanding toward the outside of the vehicle due to the step when the airbag deploys. This allows the lumbar protection section to be deployed more toward the front.

In addition, in the above embodiment, a support member (202) fixed to the seat back frame may be provided to support from below the portion of the side cover that corresponds to the guide surface.

With this configuration, when the lumbar protection section reaches the guide surface during airbag deployment, the side cover is supported from below by the support member. This prevents the side cover from deforming, and allows the guide surface to guide the lumbar protection section in the correct direction.

In order to solve the above problem, a vehicle seat (101) is provided, which comprises a seat cushion (5) including a seat cushion frame (12), a seat back frame (22) connected to the rear of the seat cushion frame, and a seat back (6) including an airbag module (60) connected to the vehicle exterior side of the seat back frame, and is characterized in that an airbag (71) to be deployed from the airbag module includes a lumbar protection section (76) that should reach the lower end portion of the seat back frame when deployed, and the lower end portion of the seat back frame is provided with a support member (102) having a guide surface (104A) that guides the lumbar protection section when the airbag is deployed.

According to this configuration, when the lumbar protection section reaches the lower end of the seat back as a result of the airbag deployment, the lumbar protection section is guided by the guide surface of the support member to inflate forward. This allows the lumbar protection section to inflate more quickly toward the front edge of the seat back. This allows the lumbar protection section to reach the surface of the seat back more quickly, and the airbag to be deployed at a higher speed in a position corresponding to the occupant's lumbar region.

In the above embodiment, the guide surface may be inclined downward toward the front.

This configuration allows the lumbar protection section to be guided to deploy forward when the airbag is deployed.

In the above embodiment, the guide surface may be curved upwardly and convexly.

This configuration makes it less likely that the airbag will come into contact with the edge of the support part when it is deployed. This allows the airbag to be deployed properly.

In the above embodiment, the support member may have an exterior joint (103A) that is connected to the side surface of the seat back frame on the exterior side of the vehicle, a rear joint (103B) that is connected to the rear surface of the seat back frame, and a support portion (104) that extends from the exterior joint to the exterior side of the vehicle, and the guide surface may be formed on the upper surface of the support portion.

With this configuration, the support member can form a guide surface and reinforce the seat back frame.

In the above embodiment, the seat back frame includes a pair of left and right back side frames (25), the seat cushion frame includes a pair of left and right cushion side frames (15) facing each other at the rear with the lower parts of the two back side frames in between, a tilt shaft (29) that penetrates the left and right back side frames to connect the left and right cushion side frames and rotatably connects the seat back frame and the seat cushion frame to each other, a receiving hole (105) that passes through the tilt shaft is provided in the vehicle exterior joint, and a welded portion (106) that is welded to the back side frame located on the vehicle exterior is provided on the edge of the vehicle exterior joint and the edge of the rear joint, and the welded portion surrounds the receiving hole at the vehicle exterior joint.

With this configuration, the support member is welded to the vehicle exterior side and rear surface of the back side frame, which increases the rigidity of the back side frame. Also, by providing a receiving hole in the vehicle exterior joint, the support member can be joined to the seat cushion frame without interfering with the tilt axis. Also, multiple welds are provided to surround the receiving hole, which increases the rigidity of the support member.

In order to solve the above problem, a vehicle seat has a seat cushion including a seat cushion frame, a seat back including a seat back frame connected to the rear of the seat cushion frame and an airbag module coupled to the vehicle exterior side of the seat back frame, and a side cover provided on the vehicle exterior side of the seat cushion frame, and an airbag to be deployed from the airbag module includes a lumbar protection section that reaches the vehicle exterior side of the seat cushion when deployed, and a guide surface that guides the lumbar protection section forward when the airbag is deployed is provided on the side cover. When the seat back expands due to the deployment of the airbag and reaches the guide surface, the lumbar protection section is guided to expand forward. Therefore, the lumbar protection section can be expanded more quickly toward the front edge of the seat back. This allows the lumbar protection section to reach the surface of the seat back more quickly, and the airbag can be deployed at a higher speed to a position corresponding to the occupant's waist.

In addition, in the above embodiment, if the guide surface is configured to slope downward toward the front, the lumbar protection section can be guided to deploy forward when the airbag deploys.

In addition, in the above embodiment, if the guide surface is curved convexly upward, the airbag is less likely to come into contact with the edge of the support portion when deployed. This allows the airbag to be deployed properly.

In addition, in the above-mentioned embodiment, if the guide surface is connected to a high step on the vehicle exterior side, the step prevents the lumbar protection section from expanding toward the vehicle exterior when the airbag deploys. This allows the deployment direction of the lumbar protection section to be concentrated more toward the front.

In addition, in the above embodiment, if a support member is provided that is fixed to the seat back frame to support from below the portion of the side cover that corresponds to the guide surface, when the lumbar protection section reaches the guide surface during airbag deployment, the side cover is supported from below by the support member. This prevents deformation of the side cover, and allows the guide surface to guide the lumbar protection section in the appropriate direction.

In order to solve the above problem, a vehicle seat is provided, which includes a seat cushion including a seat cushion frame, a seat back frame connected to the rear of the seat cushion frame, and a seat back including an airbag module connected to the vehicle exterior side of the seat back frame, and an airbag to be deployed from the airbag module includes a lumbar protection section that should reach the lower end portion of the seat back frame when deployed, and the lower end portion of the seat back frame is provided with a support member having a guide surface that guides the lumbar protection section when the airbag is deployed. When the lumbar protection section reaches the lower end portion of the seat back due to the deployment of the airbag, the guide surface of the support member guides the lumbar protection section to inflate forward. This allows the lumbar protection section to inflate more quickly toward the front edge of the seat back. This allows the lumbar protection section to reach the surface of the seat back more quickly, and the airbag to be deployed at a higher speed to a position corresponding to the occupant's lumbar region.

In addition, in the above embodiment, if the guide surface is configured to slope downward toward the front, the lumbar protection section can be guided to deploy forward when the airbag deploys.

In addition, in the above embodiment, if the guide surface is curved convexly upward, the airbag is less likely to come into contact with the edge of the support portion when deployed. This allows the airbag to be deployed properly.

In addition, in the above-mentioned aspect, the support member has an exterior joint portion that is joined to the exterior side of the seatback frame, a rear joint portion that is joined to the rear surface of the seatback frame, and a support portion that extends from the exterior joint portion to the exterior side of the vehicle, and a guide surface is formed on the upper surface of the support portion, so that the support member can form a guide surface and reinforce the seatback frame.

In the above embodiment, the seat back frame includes a pair of left and right back side frames, the seat cushion frame includes a pair of left and right cushion side frames facing each other on the left and right sides with the lower parts of the two back side frames in between, the left and right back side frames are connected to each other through the left and right back side frames, the seat back frame and the seat cushion frame have a tilting shaft that rotatably connects each other, the outer joint portion has a receiving hole through which the tilting shaft passes, the edge of the outer joint portion and the edge of the rear joint portion have welded parts that are welded to the back side frame located on the outer side of the vehicle, and the welded parts surround the receiving hole at the outer joint portion. Since the support member is welded to the outer side and rear surface of the back side frame, the rigidity of the back side frame can be increased. Also, by providing a receiving hole at the outer joint portion, the support member can be connected to the seat cushion frame without interfering with the tilting shaft. Also, since a plurality of welded parts are provided to surround the receiving hole, the rigidity of the support member can be increased.

FIG. 1 is a perspective view of a vehicle seat according to a first embodiment; FIG. 1 is an exploded perspective view of a vehicle seat according to a first embodiment; 1A and 1B are a rear view and a side view of a vehicle seat according to a first embodiment when a pad member and a cover material are removed; IV-IV cross-sectional view of FIG. 1 and an enlarged view of a portion surrounded by a dashed line in the cross-sectional view. FIG. 1 is an explanatory diagram for explaining the connection of a clip and a hook; Schematic diagrams showing the state of the airbag (A) immediately after the start of deployment, (B) when the left bolster portion abuts against the guide surface, (C) after a predetermined time has elapsed since (B), and (D) when deployment is completed. FIG. 13 is an exploded perspective view of a vehicle seat according to a second embodiment; 1A is a rear view of a vehicle seat according to a second embodiment when a pad member and a cover material are removed, and FIG. 1B is a side view of the vehicle seat according to the second embodiment. FIG. 11 is a side view of a vehicle seat according to a third embodiment when a pad member and a cover material are removed; FIG. 13 is an explanatory diagram for explaining a modified example of the clip; FIG. 13 is an explanatory diagram illustrating a modified example in which an airbag module is connected to a side frame via a bracket. FIG. 13 is an explanatory diagram for explaining a modified example in which a clip is provided in front of the slit; FIG. 13 is an explanatory diagram for explaining a modified example in which the clip is connected to the side frame. FIG. 13 is an explanatory diagram for explaining a modified example of a side cover;

Below, an embodiment in which the vehicle seat according to the present invention is applied to a vehicle seat installed in an automobile will be described with reference to the drawings.

First Embodiment
As shown in Fig. 1, a vehicle seat 1 according to the first embodiment is placed on a floor 3 that defines the bottom of a passenger compartment 2, facing the front of the vehicle (more specifically, so that a seated occupant faces the front of the vehicle). The vehicle seat 1 is supported on the floor 3 so as to be slidable forward and backward. In this embodiment, the vehicle seat 1 constitutes a passenger seat disposed next to the driver's seat. In the following description, the front-rear, left-right, and up-down directions are defined based on the directions as seen by an occupant seated in the vehicle seat 1.

The vehicle seat 1 is equipped with a seat cushion 5 that supports the buttocks of a seated person, a seat back 6 that is provided at the rear of the seat cushion 5 and functions as a backrest, and a headrest 7 provided at the top of each seat back 6.

The seat cushion 5 is a generally rectangular parallelepiped with a surface facing generally in the vertical direction. The upper surface of the seat cushion 5 forms a seating surface 9 for one occupant. The seating surface 9 is concave downwards at approximately the center in the left-right direction and is inclined slightly downwards towards the rear. This gives the seating surface 9 a shape that corresponds to the buttocks and thighs of the occupant. When the occupant sits down, the buttocks and thighs of the occupant are placed on the seating surface 9.

The seat back 6 includes a seat back central portion 6A extending in the up-down direction, and bolster portions 6B provided on the left and right sides of the seat back central portion 6A. The seat back central portion 6A is substantially rectangular parallelepiped with a surface facing substantially in the front-to-rear direction. The front surface of the seat back central portion 6A forms a backrest surface 10 that supports the back of the occupant. The backrest surface 10 is recessed rearward approximately in the center in the left-to-right direction, and is inclined slightly rearward toward the upper side. As a result, the backrest surface 10 has a shape that corresponds to the back of the occupant, and the occupant's back is supported by the backrest surface 10.

The bolster portion 6B is connected to the upper left and right side surfaces of the seatback central portion 6A. The bolster portion 6B supports the upper body of the seated occupant from the side. The bolster portion 6B protrudes further forward as it extends downward. In other words, the length of the bolster portion 6B in the front-to-rear direction increases as it extends downward. The length of the bolster portion 6B in the up-down direction is smaller than the length of the seatback central portion 6A in the up-down direction. Hereinafter, the bolster portion 6B connected to the left side of the seatback central portion 6A will be referred to as the left bolster portion 6C for convenience.

The headrest 7 is connected to the upper end of the seat back 6 via two pillars 11 (see Figure 2). The headrest 7 is positioned behind the head of a seated occupant.

As shown in FIG. 2, the seat cushion 5 includes a metal frame (seat cushion frame 12, see FIG. 7) that forms a skeleton, a pad member 13 (see FIG. 1) supported by the seat cushion frame 12, and a skin material 14 (see FIG. 1) that covers the pad member 13. As shown in FIG. 6, the seat cushion frame 12 of the seat cushion 5 has a pair of left and right side frames 15 (cushion side frames) that extend forward and backward, a front frame 16 (cross frame) that is hung between the front parts of the side frames 15, and a rear frame 17 (cross frame) that is hung between the rear parts of the side frames 15, forming a substantially rectangular frame shape. In this embodiment, the left and right side frames 15 of the seat cushion 5 are each plate-shaped with a surface facing the left and right direction. The seat cushion frame 12 may further include a plate-shaped pan frame (not shown) that extends left and right between the pair of left and right side frames 15, and a wire member (not shown) that is hung between the front frame 16 and the rear frame 17. The pad member 13 of the seat cushion 5 is disposed on the upper side of the seat cushion frame 12. As shown in FIG. 1, the upper surface of the pad member 13 is covered with a cover material 14.

The seat back 6 includes a metal frame (hereinafter, referred to as the seat back frame 22; see FIG. 7) that forms a skeleton in the same manner as the seat cushion 5, a pad member 23 (see FIG. 1) supported by the seat back frame 22, and a skin material 24 (see FIG. 1) that covers the pad member 23. The seat back frame 22 has a pair of left and right side frames 25 (back side frames) that extend vertically, an upper frame 26 that is suspended between the upper parts of the side frames 25, and a lower frame 27 that is suspended between the lower parts of the side frames 25, forming a substantially rectangular frame shape. A pressure receiving member 28 formed of a wire-like member is suspended between the left and right side frames 25. The pressure receiving member 28 is deflected by receiving a load from the occupant toward the rear, and supports the occupant's back from behind. The pad member 23 is arranged so as to cover the front surface and the left and right side surfaces of the seat back frame 22 from the front side of the seat back frame 22. The front surface and the left and right side surfaces of the pad member 23 are covered with the skin material 24.

The rear parts of the side frames 15 (cushion side frames) of the seat cushion 5 face each other on the left and right, sandwiching the lower parts of the two side frames 25 (back side frames) of the seat back 6. A tilt shaft 29 extending in the left-right direction (vehicle width direction) penetrates the lower parts of the left and right side frames 25 of the seat back 6 and the rear parts of the left and right side frames 15 of the seat cushion 5. The lower parts of the left and right side frames 25 of the seat back 6 are respectively connected to the rear parts of the corresponding side frames 15 of the seat cushion 5 so as to be rotatable around the tilt shaft 29 (see FIG. 1). More specifically, the seat back frame 22 and the seat cushion frame 12 are rotatably connected to each other by the tilt shaft 29, and the seat back frame 22 can be tilted (rotated) around the tilt shaft 29 relative to the seat cushion frame 12.

As shown in FIG. 2, the rear of the left side frame 15 of the seat cushion 5 (hereinafter, left cushion side frame 15A) and the lower part of the left side frame 25 of the seat back 6 (hereinafter, left back side frame 25A) are connected to each other via a reclining mechanism 31. The reclining mechanism 31 is located at the outer end (left end) of the tilting shaft 29 and maintains the tilt (rotation) angle of each side frame 15 of the seat back 6 relative to each side frame 25 of the seat cushion 5 at an arbitrary position. In this embodiment, the reclining mechanism 31 includes a torsion coil spring 31A provided on the left side surface of the rear part of the left side frame 15 of the seat back 6. One end of the torsion coil spring 31A is connected to the left cushion side frame 15A and the other end is connected to the left back side frame 25A. The torsion coil spring 31A biases the seat back frame 22 in a direction to tilt (rotate) forward relative to the seat cushion frame 12.

When the backrest surface 10 is in its most upright position, i.e., when the backrest surface 10 is closest to being vertical (see FIG. 1), the side frames 25 of the seat cushion 5 extend generally in the up-down direction. The following description will be given based on the state when the backrest surface 10 is in its most upright position.

The reclining mechanism 31 includes an operating lever 32. The operating lever 32 is formed from a metal plate-shaped member and is disposed so as to extend in the front-rear direction along the left side surface of the left cushion side frame 15A. As shown in FIG. 1, a grip member 33 is provided at the front end of the operating lever 32.

When an occupant grasps the grip member 33 of the operating lever 32 and pushes it down, the vehicle seat 1 switches from a restricted state in which the rotation of the seat back 6 relative to the seat cushion 5 is restricted to a released state in which rotation is possible. When the occupant releases the operating lever 32, the operating lever 32 returns to the position before it was pushed down, and the vehicle seat 1 switches from the released state to the restricted state. This allows the occupant to adjust the reclining angle of the seat back 6 relative to the seat cushion 5 by operating the operating lever 32.

As shown in FIG. 7, a rail device 34 is provided between the vehicle seat 1 and the floor 3, which allows the vehicle seat 1 to slide in the front-rear direction relative to the floor 3. The rail device 34 includes a pair of left and right lower rails 36 that are fixed to the floor 3 and extend forward and backward, and a pair of left and right upper rails 37 that are supported on the lower rails 36 so as to be slidable in the extension direction. The slide bar 38 is rod-shaped and extends left and right on the front lower side of the seat cushion 5. The seat cushion frame 12 of the seat cushion 5 is provided above the left and right upper rails 37, and the left and right upper rails 37 are connected to the seat cushion frame 12 of the seat cushion 5. The rail device 34 includes a locking mechanism that switches between a restricted state in which the upper rails 37 are restricted from sliding relative to the lower rails 36 and a released state in which the upper rails 37 are allowed to slide relative to the lower rails 36, depending on an operation input to the slide bar 38. The occupant can operate the slide bar 38 to switch between a state in which the seat cushion 5, seat back 6, and headrest 7 can be slid back and forth together relative to the floor 3, and a restricted state in which sliding movement is restricted.

As shown in FIG. 1, a side cover 55 is provided on the vehicle exterior side of the seat cushion 5. The side cover 55 is connected to the vehicle exterior side of the left cushion side frame 15A. The side cover 55 may be connected to the seat cushion frame 12, for example, by being hooked onto a wire member (not shown) welded to the left cushion side frame 15A.

The side cover 55 is a resin member and has a plate-shaped main body 56 with a surface facing the vehicle width direction, and a cylindrical portion 57 that extends from the outer periphery of the main body 56 toward the inside of the vehicle. The main body 56 has a shape that generally matches the side of the seat cushion 5.

In this embodiment, the main body 56 is formed with a cover recess 58 that is recessed toward the vehicle interior at approximately the center. A through hole 59 is provided in the wall that defines the rear edge of the cover recess 58 of the main body 56 and faces forward, allowing the operation lever 32 to pass through. The side cover 55 is connected to the side frame 15 with the operation lever 32 inserted through the through hole 59. The operation lever 32 passes through the through hole 59 and extends forward, and the grip member 33 is located on the vehicle exterior side of the side cover 55.

As shown in FIG. 1, an airbag module 60 is provided on the side frame 15 on the vehicle exterior side of the seat back 6. The airbag module 60 is attached to the left side surface (the vehicle exterior side surface) of the left side frame 15 on the vehicle exterior side, approximately in the center in the vertical direction.

As shown in FIG. 4, the airbag module 60 is a module for deploying an airbag 71 (so-called side airbag) on the vehicle exterior side of an occupant seated in the vehicle seat 1. The airbag module 60 includes an airbag 71 that deploys on the vehicle exterior side of the occupant, an inflator 72 that generates gas within the airbag 71 to inflate (deploy) the airbag 71, and a case 73 that houses the airbag 71 and the inflator 72.

The airbag 71 is a bag-shaped member that is divided into multiple compartments. The divided compartments include compartment 75A that forms shoulder protection section 74 that deploys on the outside (left side) of the occupant's shoulders and chest protection section 75 that deploys on the outside (left side) of the occupant's chest by gas generated by inflator 72, and compartment 76A that forms waist protection section 76 that deploys on the outside (left side) of the occupant's waist (see FIG. 6B). In this embodiment, the shoulder protection section 74 and chest protection section 75 are formed by a single compartment 75A.

As shown in FIG. 4, the inflator 72 has a cylindrical main body 72A and a plurality of male threads 72B protruding radially outward from the main body 72A. As shown in FIG. 6(B), one end of the inflator 72 in the extending direction communicates with a chamber 75A forming the shoulder protection section 74 and chest protection section 75 of the airbag 71, and the other end communicates directly with a chamber 76A forming the waist protection section 76 of the airbag 71 without going through another chamber.

As shown in FIG. 4, the case 73 is a box body having a substantially rectangular parallelepiped shape. The case 73 includes a bottomed rectangular cylindrical case body 73B having an opening 73A, and a resin lid member 73C that covers the opening 73A of the case body 73B. A plurality of through holes 73D are formed in the bottom wall of the case body 73B to allow the male threads 72B of the inflator 72 to pass through. The lid member 73C is a substantially rectangular plate-like member, and is formed with a cleavage portion 73E that cleaves when the airbag 71 inflates. In this embodiment, the cleavage portion 73E is formed along the outer edge of one side of the lid member 73C as a portion having a smaller thickness than the other portions. A locking hole 73F is formed in the opening edge of the case body 73B, which penetrates in the thickness direction, and the lid member 73C is provided with a locking claw 73G that is hooked to the locking hole 73F. The airbag 71 is folded, and the inflator 72 is arranged so that the male screw 72B passes through the through hole 73D and protrudes from the case body 73B, and is stored inside the case body 73B. Furthermore, the locking claw 73G is hooked into the locking hole 73F, and the lid member 73C is connected to the case body 73B. The lid member 73C seals the opening 73A of the case body 73B.

The airbag module 60 is arranged along the outer side of the left side frame 15 of the seat back 6, with one end of the inflator 72 (the end communicating with the compartment 75A forming the shoulder protection section 74 and chest protection section 75) on the upper side and the other end (the end communicating with the compartment 76A forming the waist protection section 76) on the lower side. The male screw 72B of the inflator 72 is fastened to the side frame 15, so that the airbag module 60 is attached to the left side of the side frame 15. At this time, the cleavage section 73E of the cover member 73C is located near the left front edge of the case 73.

When the airbag 71 is deployed, as shown by the arrows in Figures 6(A) to (D), the inflator 72 releases gas from each of its ends (upper and lower ends) in the extension direction in opposite directions along the extension direction of the main body 72A. More specifically, the inflator 72 releases gas upward from the upper end. The gas released upward from the inflator 72 flows into the individual chambers 75A that form the shoulder protection section 74 and chest protection section 75. Furthermore, the inflator 72 releases gas downward from the lower end. The gas released downward from the inflator 72 flows directly into the individual chamber 76A that forms the waist protection section 76 without passing through other individual chambers.

As shown in FIG. 4, the pad member 23 covers the front, left and right outer sides, and upper side of the seat back frame 22. The pad member 23 is provided on the front side of the seat back frame 22 and includes a front central portion 81A provided at a position corresponding to the backrest surface 10, and a left side portion 81B and a right side portion (not shown) located on the left and right sides of the front central portion 81A and bulging forward. The front central portion 81A constitutes the seat back central portion 6A, and the left side portion 81B and the right side portion constitute the bolster portion 6B. Between the front central portion 81A and the left side portion 81B and between the front central portion 81A and the right side portion, there are provided thin-walled portions 83 that are thinner than the front central portion 81A, the left side portion 81B, and the right side, respectively. That is, the front center portion 81A and the left side portion 81B are connected to the front center portion 81A and the right side portion by thin portions 83, and the pad member 23 is easily bent and deformed at the thin portions 83 (see the dashed lines in FIG. 4).

The airbag module 60 is covered from the front, rear, top and bottom, and from the outside of the vehicle (left side) by the left side section 81B. The left side section 81B has a slit 80 that penetrates in the thickness direction at a position corresponding to the right end of the front edge of the airbag module 60. The slit 80 is provided so as to extend vertically on the left side surface of the left side section 81B.

The surface of the pad member 23 is covered with a bag-shaped skin material 24. The skin material 24 includes a front skin material 85 that covers the front surface of the pad member 23, a left skin material 86 (outer skin material) that covers the left side surface of the pad member 23, a right skin material (not shown) that covers the right side surface of the pad member 23, and an upper skin material (not shown) that covers the upper surface of the pad member 23. In this embodiment, the skin material 24 includes a rear skin material 87 that connects the right skin material and the left skin material 86 on the left and right sides and covers the rear side of the seat back frame 22. The left side portion 81B is covered from above by the upper skin material, and from the front and rear, the outer side (left side), and the lower side by the left skin material 86.

The front skin material 85 and the left skin material 86 are sewn together to form a seam 88. The seam 88 functions as a weak part that tears when a predetermined load or more is applied from the inside of the seat back 6 by the inflated airbag 71. As shown in FIG. 1, the seam 88 extends vertically on the exterior side surface of the left side portion 81B. In this embodiment, the seam 88 reaches from the upper end to the lower end of the exterior side surface of the left side portion 81B. The seam 88 is located in front of the slit 80, near the front edge of the exterior side surface of the left side portion 81B.

A receiving recess 90 that is recessed toward the vehicle interior (right side) is formed on the vehicle exterior side (left side) of the left side portion 81B. In this embodiment, the receiving recess 90 is located in front of the slit 80. The receiving recess 90 extends vertically in a stripe shape at approximately the vertical center of the left side portion 81B. A clip 91 is provided in the receiving recess 90 (vehicle interior end). In this embodiment, the clip 91 is a resin member, and multiple clips 91 are accommodated in the receiving recess 90 so that they are arranged at equal intervals.

As shown in FIG. 5, the clip 91 has a flat bottom plate portion 91A, a protrusion portion 91B that protrudes from the bottom plate portion 91A toward the outside of the vehicle, a pair of extension portions 91C that extend toward the outside of the vehicle in pairs at the front and rear of the protrusion portion 91B, and a pair of locking claws 91D that protrude in opposing directions at each of the extension ends of the extension portion 91C.

A hook 92 is connected to the clip 91. In this embodiment, the hook 92 is made of resin. The hook 92 has a flat plate portion 92A inserted between two locking claws 91D, and a pair of locking pieces 92B protruding in opposite directions from the (inner end) of the flat plate portion 92A. The bottom plate portion 91A abuts against a wall surface that defines the receiving recess 90 of the pad member 23, and is pressed against it from the front and rear. As a result, the clip 91 is received in the receiving recess 90 and locked to the pad member 23. The hook 92 is locked to the clip 91 by the engagement between the locking pieces 92B and the locking claws 91D, restricting movement of the hook 92 toward the outside of the vehicle.

A sheet-like member, the webbing 93, is connected to the hook 92. One end of the webbing 93 is sewn to the flat portion 92A of the hook 92, and the other end is sewn to the approximate center in the vertical direction of the stitching portion 88 (see FIG. 6A).

As shown in FIG. 1, the rear of the side cover 55 is located below the bolster portion 6B on the vehicle exterior side (left side). An upwardly facing guide surface 96 is formed on the vehicle interior side edge (right edge) of the rear upper surface of the side cover 55. As shown in FIG. 1 and FIG. 3(B), the guide surface 96 is located below the bolster portion 6B on the vehicle exterior side (left side), below the airbag module 60, and is inclined downward toward the front. In other words, the guide surface 96 is inclined upward from a point located below the lower front edge of the airbag module 60 to a point located below the lower rear edge of the lower end.

In this embodiment, as shown in FIG. 3(A), a guide wall 97 extending upward is provided on the outer edge (left edge) of the guide surface 96. As a result, a step 98 that is higher on the outer side of the vehicle than on the inner side of the vehicle is connected to the guide surface 96. The guide wall 97 is positioned so that the airbag module 60 does not come into contact with it when the seat back 6 is tilted. In this embodiment, the airbag module 60 is located farther from the tilt axis 29 than the upper edge of the guide wall 97. Furthermore, the guide surface 96 is gently curved upwardly convexly in side view.

Next, the operation of the vehicle seat 1 thus configured will be described. When the airbag 71 is deployed, gas is introduced from the inflator 72 into the compartments 75A constituting the shoulder protection section 74 and chest protection section 75, and into the compartments 76A constituting the waist protection section 76. This causes the airbag 71 to inflate, and the case 73 to rupture at the rupture section 73E.

As shown in FIG. 6(A), after the case 73 is ruptured, gas is further introduced into the private chamber 76A that constitutes the lumbar protection part 76, causing the lumbar protection part 76 to expand downward. As shown in FIG. 6(B), the expansion of the lumbar protection part 76 causes the left bolster part 6C to expand downward, and the underside of the left bolster part 6C comes into contact with the guide surface 96. Because the guide surface 96 is inclined downward toward the front, the downward expansion of the lumbar protection part 76 is restricted by the guide surface 96, and the expansion (deployment) of the lumbar protection part 76 is guided forward. This causes the lumbar protection part 76 to expand forward.

When the lumbar protection part 76 inflates forward, it passes through the slit 80 and reaches the skin 24. The lumbar protection part 76 then inflates forward along the gap between the pad member 23 and the skin 24. As a result, as shown in Figures 6(C) and (D), a load is applied to the lower part of the stitching 88 of the lumbar protection part 76, which tears the lower part of the stitching 88 and forms an opening in the skin 24 covering the lower part of the left side part 81B. As a result, the lumbar protection part 76 passes through the formed opening and inflates diagonally forward and left through the surface of the seat back 6, deploying to the outside of the vehicle around the occupant's waist.

After the case 73 is torn open, gas is introduced into the compartment 75A that constitutes the shoulder protection section 74 and chest protection section 75, as well as the waist protection section 76. This causes the shoulder protection section 74 to expand upward, as shown in FIG. 6(A). Furthermore, when gas is introduced, the gas is guided forward by the edge that defines the shoulder protection section 74 of the compartment 75A, causing the shoulder protection section 74 to expand forward. The gas introduced into the compartment 75A may be configured to be guided forward by the skin material 24 that covers the left side section 81B.

When the shoulder protection part 74 inflates forward, it passes through the slit 80 and reaches the upholstery material 24. The shoulder protection part 74 then inflates forward along the gap between the pad member 23 and the upholstery material 24. As a result, as shown in FIG. 6(B), a load is applied to the upper part of the stitching part 88 of the shoulder protection part 74, and the upper part of the stitching part 88 is torn, forming an opening in the upholstery material 24 covering the upper part of the left side part 81B. As a result, as shown in FIG. 6(C) and (D), the shoulder protection part 74 passes through the formed opening and inflates diagonally forward and left through the surface of the seat back 6, deploying to the outside of the vehicle on the occupant's shoulder.

As shown in FIG. 6C, when the shoulder protection part 74 inflates forward and the stitching part 88 starts to tear, gas also flows into the part of the compartment 75A that corresponds to the chest protection part 75. This causes the chest protection part 75 to inflate to the left, passing through the slit 80 and inflating forward along the space between the skin 24 and the left side part 81B.

As can be seen from FIG. 4, when chest protection part 75 inflates forward along the gap between skin 24 and left side 81B, chest protection part 75 comes into contact with webbing 93. When chest protection part 75 further inflates, a forward load is applied to webbing 93, and stitching 88 ruptures. This forms an opening in the vertical center of the front left end of skin 24 covering left side 81B. Chest protection part 75 passes through the formed opening in skin 24 and inflates diagonally forward and left of seat back 6, deploying to the outside of the vehicle against the occupant's chest.

At this time, an opening is formed in the skin material 24 covering the vertical center portion of the left side portion 81B, and when the chest protection portion 75 passes through the opening, the left side portion 81B is pushed forward, and the pad member 23 is folded at the thin portion 83. The folding deformation of the pad member 23 increases the width of the slit 80 in the front-to-rear direction, making it easier for the airbag 71 to pass through the slit 80, and the airbag 71 is deployed more quickly.

Next, the effects of the vehicle seat 1 configured in this manner will be described. When gas released from the inflator 72 is introduced into the compartment 75A that constitutes the shoulder protection section 74 and the chest protection section 75, the shoulder protection section 74 inflates upward and then inflates forward. When gas released from the inflator 72 is introduced into the compartment 76A that constitutes the lumbar protection section 76, the lumbar protection section 76 inflates downward and then inflates forward.

As shown in FIG. 1, in the vehicle seat 1, the left side portion 81B is formed so that the front-rear width increases downward. Therefore, the lumbar protection portion 76 is farther forward and rearward from the stitching portion 88 than the shoulder protection portion 74. Therefore, even if the lumbar protection portion 76 and the shoulder protection portion 74 each inflate forward at roughly the same rate, the deployment of the lumbar protection portion 76 out of the seat back 6 may be delayed relative to the shoulder protection portion 74.

In this embodiment, the side cover 55 is provided with a guide surface 96 that slopes downward toward the front. This allows the left bolster portion 6C to abut against the guide surface 96, guiding the lumbar protection portion 76 to inflate forward. This allows the lumbar protection portion 76 to inflate forward more quickly than when the guide surface 96 is not provided. This allows the airbag 71 to be deployed more quickly toward the outer side of the occupant's lumbar region outside the seat back 6 than when the guide surface 96 is not provided.

In this embodiment, a guide wall 97 is provided on the outer edge of the guide surface 96, and a step 98 that raises the outer side of the vehicle is connected to it. By providing the step 98, when the lumbar protection part 76 abuts against the guide surface 96, the step 98 prevents the lumbar protection part 76 from expanding toward the outer side of the vehicle. As a result, the deployment direction of the lumbar protection part 76 is more likely to be concentrated forward than when the step 98 is not provided, so that the lumbar protection part 76 can be deployed toward the outer side of the vehicle more quickly than when the step 98 is not provided.

In addition, the guide surface 96 is gently curved upwardly and convexly in side view. This allows the guide surface 96 to withstand a larger load from above. This makes it difficult for the side cover 55 to deform when deployed, and allows the deployment of the lumbar protection section 76 to be more appropriately guided.

In this embodiment, a thin portion 83 is provided between the front center portion 81A and the left side portion 81B. By providing the thin portion 83, when the airbag 71 deploys outside the seat back 6, the pad member 23 is bent and deformed at the thin portion 83, and the width of the slit 80 is expanded. This makes it easier for the airbag 71 to pass through the slit 80, allowing the airbag 71 to deploy more quickly.

<<Second embodiment>>
The vehicle seat 101 according to the second embodiment is different in that a support member 102 is provided on the side frame 15 on the vehicle exterior side (left side) of the seat back 6 and that a guide wall 97 is not provided on the side cover 55. Since the other configurations are the same as those of the first embodiment, a description thereof will be omitted. In the following description, the state when the backrest surface 10 is in the most upright state is used as a reference.

The support member 102 is a bent sheet metal member. The support member 102 is below the airbag module 60 and is connected to the lower end portion of the left backside frame 25A. The support member 102 includes an exterior joint 103A connected to the exterior side (left side) of the left backside frame 25A, a rear joint 103B connected to the rear side of the left backside frame 25A, and a support portion 104 connected to the upper edge of the exterior joint 103A.

The vehicle exterior joint 103A is flat. It is shaped to fit the vehicle exterior side surface of the lower end of the left back side frame 25A. A receiving hole 105 is formed in the approximate center of the vehicle exterior joint 103A, penetrating it in the thickness direction.

The rear joint 103B is a plate extending from the rear edge of the outer joint 103A toward the inner side (right side) of the vehicle. The rear joint 103B has a surface facing the front-rear direction. The left-right width of the rear joint 103B is shorter than the left-right width of the left back side frame 25A.

The vehicle exterior joint 103A is positioned so that the tilt axis 29 passes through the receiving hole 105 and is aligned along the vehicle exterior side surface of the left rear side frame 25A. The rear joint 103B is positioned so that it is aligned along the rear surface of the left rear side frame 25A. The front and bottom edges of the vehicle exterior joint 103A and the vehicle interior edge (right edge) of the rear joint 103B are spot welded to the left rear side frame 25A at multiple locations (hereinafter, welds 106). In this embodiment, the welds 106 are provided so as to surround the receiving hole 105 at the vehicle exterior joint 103A.

The support portion 104 is plate-shaped and extends from the upper edge of the outer joint portion 103A to the outside of the vehicle. A guide surface 104A that slopes downward toward the front is formed on the upper surface of the support portion 104. More specifically, the guide surface 104A slopes downward toward the front when the backrest surface 10 is in its most upright state. In this embodiment, the guide surface 104A is gently curved upwardly and convexly in a side view.

The side cover 55 is arranged to cover the lower half of the vehicle exterior joint 103A from the vehicle exterior. As in the first embodiment, the side cover 55 is joined to the left side surface (vehicle exterior side surface) of the left cushion side frame 15A. The upper half of the support member 102, including the support portion 104, is located above the side cover 55. The upper half of the support member 102, together with the airbag module 60, is stored inside the seat back 6, covered from the front, rear, and vehicle exterior sides by the pad member 23 and the skin material 24.

Next, the effect of the vehicle seat 101 according to the second embodiment will be described. When the airbag 71 deploys, the lumbar protection section 76 inflates downward, similar to the first embodiment. As a result, the lumbar protection section 76 reaches the support member 102 located at the lower end of the side frame 15.

At this time, the lumbar protection section 76 abuts against the guide surface 104A from above. Because the guide surface 104A is inclined downward toward the front, the lumbar protection section 76 is guided by the guide surface 104A to inflate forward. This allows the lumbar protection section 76 to inflate toward the front edge of the seat back 6 more quickly than in the case where the guide surface 104A is not provided. This allows the airbag 71 to reach the surface of the seat back 6 more quickly, and the airbag 71 to be deployed at a higher speed to a position corresponding to the occupant's lumbar region.

Furthermore, because the guide surface 104A is curved convexly upward, the airbag 71 is less likely to come into contact with the edge of the support portion 104 when deployed. This prevents the airbag 71 from coming into contact with the leading edge or trailing edge of the support portion 104 during deployment. In this way, by preventing contact between the airbag 71 and the leading edge or trailing edge of the support portion 104, the airbag 71 can be deployed more appropriately.

In addition, because the guide surface 104A can be formed using the support member 102, which is a sheet metal member, the guide surface 104A can be formed using a simple structure.

Furthermore, a receiving hole 105 is provided in the vehicle exterior connecting portion 103A of the support member 102, and the tilt axis 29 is received in the receiving hole 105. This allows the support member 102 to be connected to the side frame 15 of the seat back 6 without interfering with the tilt axis 29. Furthermore, the vehicle exterior connecting portion 103A is welded to the side frame 15 at a welding portion 106 that is provided to surround the receiving hole 105. This increases the rigidity and reinforces the vicinity of the tilt axis 29, which is a movable portion of the seat back frame 22 that is likely to be subjected to load during a collision.

When a load is applied to the vehicle seat 1 from the back due to a collision or the like, the load is likely to be applied to the joint between the side frame 15 and the lower frame 27 and the joint between the side frame 15 and the upper frame 26. In this embodiment, the rear joint 103B is welded near the lower edge of the rear surface of the side frame 15, thereby increasing the rigidity near the joint between the side frame 15 and the lower frame 27. This makes it possible to reinforce the area that is likely to be subjected to a load in the event of a collision. In addition, by arranging the vehicle exterior joint 103A and the rear joint 103B so that they are perpendicular to each other, the rigidity of the support member 102 itself can be increased.

<<Third embodiment>>
The vehicle seat 201 according to the third embodiment differs from the vehicle seat 1 according to the first embodiment in that a support member 202 is provided. The support member 202 provided in the vehicle seat 201 according to the third embodiment is different from the support member 102 of the vehicle seat 101 according to the second embodiment. Other configurations are similar to those of the vehicle seat 1 according to the first embodiment, and therefore descriptions thereof will be omitted. Also, as in the first and second embodiments, the description will be given based on the state when the backrest surface 10 is in the most upright state.

The support member 202 of the vehicle seat 201 according to the third embodiment is a bent sheet metal member. The support member 202 is below the airbag module 60 and is connected to the lower end portion of the side frame 15 on the vehicle exterior side. The support member 102 includes an exterior joint 203A connected to the exterior side surface of the side frame 15, a rear joint 203B connected to the rear side surface of the side frame 15, and a support portion 204 connected to the upper edge of the exterior joint 203A.

The vehicle exterior joint 203A is flat. The vehicle exterior joint 203A is shaped to fit the vehicle exterior side surface of the lower end of the left back side frame 25A. A receiving hole 205 is formed in the approximate center of the vehicle exterior joint 203A, penetrating it in the thickness direction.

The rear joint 203B is a plate extending from the rear edge of the outer joint 203A toward the inside of the vehicle. The rear joint 203B has a surface facing the front-rear direction. The left-right width of the rear joint 203B is shorter than the left-right width of the left back side frame 25A.

The vehicle exterior joint 203A is positioned so that the tilt axis 29 passes through the receiving hole 205 and is aligned along the vehicle exterior side surface of the left rear side frame 25A. The rear joint 203B is positioned so as to be aligned along the rear surface of the left rear side frame 25A. The vehicle exterior edge of the vehicle exterior joint 203A and the vehicle interior edge of the rear joint 203B are each spot welded to the left rear side frame 25A at multiple locations (hereinafter, welds 206). In this embodiment, the welds 206 are provided so as to surround the receiving hole 205 at the vehicle exterior joint 203A.

The support portion 204 is plate-shaped and extends from the upper edge of the outer joint portion 203A to the outside of the vehicle. A support surface 207 that slopes downward toward the front is formed on the upper surface of the support portion 204. More specifically, the support surface 207 slopes downward toward the front when the backrest surface 10 is in its most upright state. In this embodiment, the support surface 207 is gently curved upwardly and convexly in a side view, and has a shape that corresponds to the guide surface 96 of the side cover 55.

As shown in FIG. 9, the side cover 55 is disposed so as to cover the entire support member 202 from the outside of the vehicle, and is connected to the side frame 15 of the seat cushion 5. The support surface 207 abuts from below against the portion of the side cover 55 that corresponds to the guide surface 96, and supports the guide surface 96 from below.

Next, the effects of the vehicle seat 201 according to the third embodiment will be described. When the airbag 71 deploys, the lumbar protection section 76 inflates downward in the same manner as in the first embodiment, and the left bolster section 6C inflates downward due to the inflation of the lumbar protection section 76, and the lower surface of the left bolster section 6C abuts against the guide surface 96. At this time, a downward load is applied to the guide surface 96 from the left bolster section 6C.

Because the support surface 207 abuts from below against the portion of the side cover 55 that corresponds to the guide surface 96, the support surface 207 is supported from below by the support member 202. This prevents deformation of the portion of the side cover 55 that corresponds to the guide surface 96. This allows the lumbar protection section 76 to be guided in a more appropriate deployment direction, allowing the lumbar protection section 76 to be deployed outside the seat back 6 more quickly and more reliably protecting the occupant.

Although the description of the specific embodiment is finished above, the present invention is not limited to the above embodiment and can be modified in a wide range of ways. As shown in FIG. 10, the protruding amount of the front-positioned locking claw 91D may be smaller than the protruding amount of the rear-positioned locking claw 91D. When the airbag 71 is inflated, a load is applied to the webbing 93 in the forward direction, so that the rear-positioned locking claw 91D and the locking piece 92B mainly engage with each other, preventing the hook 92 from coming off the clip 91. In addition, by making the protruding amount of the front-positioned locking claw 91D smaller than the rear-positioned locking claw 91D, the worker can easily connect the hook 92 to the clip 91 when assembling the vehicle seat 1, 101, 201, compared to when the protruding amount of the front-positioned locking claw 91D is the same as that of the rear-positioned locking claw 91D.

In the first to third embodiments, the airbag module 60 is fastened to the side frame 25 of the seat back 6, but this is not limited to the above. As shown in FIG. 11, the airbag module 60 may be connected to the side frame 25 of the seat back 6 via a bracket 210. For example, the bracket 210 may be a sheet metal member bent to form a U-shape that opens forward when viewed from above, and the airbag module 60 may be inserted from the front into the opening of the bracket 210, so that the airbag module 60 is sandwiched by the bracket 210 and connected to the side frame 25. The bracket 210 may also be formed with a notch 211 of a predetermined shape, and the airbag module 60 may have a hook 212 that is hooked to the notch 211.

In the first to third embodiments, the clip 91 is accommodated in the receiving recess 90 provided on the outer side of the pad member 23, but this is not limited to the above. The recess 222 in which the clip 91 is accommodated may be formed in the front surface of the left side portion 81B on the outer side (right side) of the pad member 23 so as to be recessed rearward, as shown in FIG. 12. In this case as well, the chest protection portion 75 passes through the slit 80 and inflates forward through the gap between the pad member 23 and the left side skin material 86 and between the pad member 23 and the front side skin material 85. As a result, the chest protection portion 75 comes into contact with the webbing 93, and a load is applied to the webbing 93 in the forward direction, causing the stitching portion 88 to rupture. As a result, an opening is formed in the vertical center portion of the front left end of the skin material 24 covering the left side portion 81B, and the chest protection portion 75 deploys outside the seat back 6.

As shown in FIG. 13, a clip 291 for hooking a hook 92 connected to a webbing 93 may be directly connected to the seat back frame 22. The clip 291 may have an opening toward the outside or front of the vehicle and a receiving hole 292 for receiving the hook 92.

In the first embodiment, the step 98 is connected to the guide surface 96, but this is not limited to the embodiment. For example, as shown in FIG. 14, the guide surface 296 may be a slope that is inclined so that the outer side of the vehicle is higher. By raising the outer side of the guide surface 296, the lumbar protection part 76 is guided to the inner side of the vehicle (right side), so that the lumbar protection part 76 deploys forward more quickly.

In addition, in the third embodiment, one end of the torsion coil spring 31A may be configured to be hooked to the support portion 204 of the support member 202.

In the above embodiment, the vehicle seat 1, 101, 201 constitutes a passenger seat, but is not limited to this aspect. For example, the vehicle seat 1, 101, 201 may constitute a rear seat arranged in the second row or later.

1: Vehicle seat according to the first embodiment 5: Seat cushion 6: Seat back 12: Seat cushion frame 15: Side frame (cushion side frame)
22: Seat back frame 28: Tilt axis 15: Side frame (back side frame)
55: Side cover 60: Airbag module 71: Airbag 76: Lumbar protection section 96: Guide surface 98: Step 101: Vehicle seat according to second embodiment 102: Support member 103A: Vehicle exterior joint section 103B: Rear joint section 104: Support section 104A: Guide surface 105: Receiving hole 106: Welded section 201: Vehicle seat according to third embodiment 202: Support member

Claims (9)

a seat cushion including a seat cushion frame;
a seat back including a seat back frame connected to a rear portion of the seat cushion frame , an airbag module coupled to a side surface of the seat back frame facing an exterior side of the vehicle , a pad member supported by the seat back frame, and a skin material covering a front surface of the pad member ,
a webbing having one end to which the skin is sewn is provided between the skin and the pad member;
A first recess is provided on the front surface of the pad member, the first recess being a thin portion for facilitating deformation, and a second recess is provided on the seat outer side in the left-right direction of the first recess, the second recess being recessed rearward and accommodating a clip for engaging the other end of the webbing.
A vehicle seat , wherein a front-rear thickness of the pad member at a portion where the first recess is provided is smaller than a front-rear thickness of the pad member at a portion where the second recess is provided . The vehicle seat according to claim 1 , wherein a depth of the second recess from the front surface of the pad member is smaller than a depth of the first recess from the front surface of the pad member. The vehicle seat according to claim 1 , wherein the second recess is located on an outer side of the seat in a left-right direction of the airbag module. 2. The vehicle seat according to claim 1, wherein the second recess is located in front of the airbag module. The vehicle seat according to claim 1 , wherein a front end of the airbag module is located between a bottom surface of the first recess and a bottom surface of the second recess in the front-rear direction. The airbag module includes an inflator for deploying an airbag,
The vehicle seat according to claim 1 , wherein the second recess is located on an outer side of the seat in a left-right direction of the inflator. The airbag module includes an inflator for deploying an airbag,
The vehicle seat according to claim 1 , wherein the second recess is located in front of the inflator. The seat back frame has a pair of left and right side frames each extending vertically,
The vehicle seat according to claim 1 , wherein a front end of the side frame located on an outer side of the vehicle is located between a bottom surface of the first recess and a bottom surface of the second recess in the front-rear direction. The other end of the webbing is provided with a hook,
The vehicle seat according to any one of claims 1 to 8, wherein the clip is provided with a receiving portion that opens toward an opening direction of the second recess and receives the hook.

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