Vehicle seats

Abstract

The present invention provides a vehicle seat in which the load on the fixing member for suspending the upholstery is reduced when the airbag deploys. [Solution] The vehicle seat S comprises a cushion portion 1 and a side airbag device 20 that houses an airbag 21. The cushion portion 1 has a seating portion 1a, a ridge portion 1b, a pad 30, and a surface 40 that covers the pad 30. The pad 30 has a suspension groove 34 formed between the seating portion 1a and the ridge portion 1b. The surface 40 has a suspension member 41. The suspension groove 34 consists of a first wall 34a and a second wall 34b. The suspension groove 34 is provided with a fixing member 35 that fixes the suspension member 41 of the surface 40. A divided portion 7 is formed along a plane perpendicular to the extending direction of the cushion portion 1 in the ridge portion 1b of the cushion portion 1. When the airbag 21 is deployed, the divided ridge portion 1b rotates around the suspension groove 34, causing the first wall 34a and the second wall 34b to come into close proximity and support the fixing member 35.

Description

Technical Field

[0001] The present invention relates to a vehicle seat, and particularly to a vehicle seat provided with a side airbag.

Background Art

[0002] In recent years, vehicle seats have come to be provided with side airbags for protecting passengers from side impacts (see, for example, Patent Document 1). When a side airbag receives an impact, it is deployed to protect the passenger by alleviating and distributing the impact load.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a conventional vehicle seat provided with an airbag, a force cloth for guiding the deployment direction of the airbag was provided on the skin. However, providing the force cloth increases the number of components and also increases the process of attaching the force cloth to the skin during manufacturing, resulting in an increase in manufacturing cost. Therefore, an airbag without a force cloth is desired, but when the force cloth is eliminated, there has been a concern that a large load is applied to a clip (fixing member) that fixes the skin to the pad when the airbag is deployed.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle seat in which the load applied to a fixing member for suspending the skin, for example, when an airbag is deployed, is reduced.

Means for Solving the Problems

[0006] The above problem is solved by a vehicle seat comprising a cushion portion and a side airbag device provided within the cushion portion for storing an airbag, wherein the cushion portion comprises a seat portion having a seating surface, a ridge portion located on the side of the seat portion and bulging toward the seating surface, a pad, and a surface covering the pad, wherein the pad has a suspension groove formed between the seat portion and the ridge portion for suspending the surface covering, the surface covering has a suspension member, the suspension groove consists of a first wall and a second wall opposite the first wall, and the suspension The groove is provided with a fixing member for fixing the suspension member of the surface, and a divided portion is formed in the embankment portion of the cushion portion on the seating surface side, along a plane perpendicular to the extending direction of the cushion portion, so that when the airbag is deployed, the embankment portion separated by the divided portion rotates around the suspension groove, so that the first wall and the second wall come close together to support the fixing member, and the cushion portion is not provided with a reinforcing fabric for guiding the deployment direction of the airbag, thus solving the problem. If no reinforcing fabric is provided, a large load is placed on the fixing member when the airbag deploys. However, by forming a divided section in the embankment, the embankment rotates around the suspension groove when the airbag deploys, and the first and second walls of the suspension groove come into close proximity to support the fixing member, thereby reducing the load on the fixing member. As a result, it is possible to provide a vehicle seat in which the load on the fixing member for suspending the upholstery is reduced when the side airbag deploys. Furthermore, in vehicle seats equipped with side airbag systems, the absence of reinforcing fabric reduces the number of parts and manufacturing steps, thereby lowering manufacturing costs.

[0007] In the above configuration, the dividing portion consists of a first dividing portion and a second dividing portion that are separated in the extending direction of the cushion portion, wherein the first dividing portion is located outside the outer end of the airbag device in the extending direction of the cushion portion, and the second dividing portion is located inside the inner end of the airbag device in the extending direction of the cushion portion. By constructing the divided section with a first and second separated section, the dam section becomes easier to separate when the airbag deploys, allowing the dam section to rotate efficiently.

[0008] In the above configuration, the dividing portion may have a third dividing portion that connects the first dividing portion and the second dividing portion and extends along the direction of extension of the cushion portion. The presence of a third dividing section makes it easier for the dam to separate when the airbag deploys, allowing the dam to rotate more efficiently.

[0009] In the above configuration, the suspension member of the skin is preferably configured to be extendable when the airbag is deployed. As the suspension member extends, the energy generated during airbag deployment is absorbed, reducing the load on the fixing member.

[0010] In the above configuration, the suspension member has an extension portion extending from the outer skin and an engagement portion at the tip of the extension portion that engages with the fixing member, and the extension portion is normally folded to a predetermined length by sewing a portion of it, and when the airbag is deployed, the sewing breaks and it extends. By folding the extended portion and sewing a part of it, the energy generated when the airbag deploys can break the stitching and extend the suspension member.

[0011] In the above configuration, the surface may have a sewn portion provided near the top of the embankment portion along the extending direction of the cushion portion, and a fragile portion formed along the sewn portion. By creating a weak point in the outer layer along the seams, the outer layer will tear along the weak point when the airbag deploys, allowing the airbag to deploy prematurely at the intended location. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a vehicle seat in which the load on the fixing member for suspending the upholstery is reduced when the airbag is deployed. Furthermore, by composing the divided section with a first divided section and a second divided section separated by a gap, the dam section becomes easier to separate when the airbag deploys, allowing the dam section to rotate efficiently. Furthermore, the presence of a third separation point makes it easier for the dam to separate when the airbag deploys, allowing the dam to rotate more efficiently. Furthermore, as the suspension member extends, the energy generated during airbag deployment is absorbed, reducing the load on the fixing member. Furthermore, by folding and sewing the extended portion, the energy generated during airbag deployment causes the stitching to break, thereby extending the suspension member. Furthermore, by creating a weak point in the outer layer along the seam, when the airbag deploys, the outer layer will tear along the weak point, allowing the airbag to be deployed earlier in the intended area. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view of the vehicle seat according to this embodiment, taken from a diagonal front view. [Figure 2] This is a perspective view of the seat back frame from a diagonal front angle. [Figure 3] This is a view of the seatback from the front with the upholstery removed. [Figure 4] This is a cross-sectional view along line AA in Figure 3. [Figure 5] Figure 3 is a cross-sectional view along line BB, showing the area where the first slit was formed. [Figure 6] This diagram shows the side airbag system in its deployed state. [Figure 7] This diagram shows a magnified view of the area around the suspension groove, illustrating the state before and after the airbag deployment. [Modes for carrying out the invention]

[0014] Hereinafter, the configuration of the vehicle seat according to the present embodiment will be described with reference to the drawings. However, the embodiment described below is an example for facilitating the understanding of the present invention and does not limit the present invention. That is, the present invention can be changed and improved without departing from its gist, and it is needless to say that the equivalents of the present invention are included therein.

[0015] In the following, a vehicle seat will be cited as an example of the vehicle seat, and its configuration example will be described. In the following description, the "front-rear direction" is the front-rear direction of the vehicle seat and coincides with the traveling direction of the vehicle when it is running. The "seat width direction" is the width direction of the vehicle seat and coincides with the left-right direction as seen from the occupant sitting on the vehicle seat. The "vertical direction" is the vertical direction of the vehicle seat and coincides with the vertical direction when the vehicle is running on a horizontal plane.

[0016] In the following description, when various directions are described with "seat" attached thereto, such as the "seat width direction" and the "seat height direction", the direction with respect to the vehicle seat is indicated. When "vehicle" is attached thereto, such as "inside the vehicle" and "outside the vehicle", the direction with respect to the vehicle is indicated. In addition, regarding the shape, position, posture, etc. of each part of the vehicle seat described below, unless otherwise specified, the case where the vehicle seat is in a state where it can be seated will be assumed for the description.

[0017] <Basic Configuration of Vehicle Seat S> The configuration of the vehicle seat S according to an embodiment of the present invention will be described with reference to Figures 1 to 7. Figure 1 is a perspective view of the vehicle seat S according to the first embodiment, seen from the front at an angle. In Figure 1, for illustrative purposes, a part of the vehicle seat S is shown with the upholstery 2d, 40 (also called the trim cover) removed. Figure 2 is a perspective view of the seat back frame 10, seen from the front at an angle. Figure 3 is a front view of the seat back 1, showing the seat back 1 with the upholstery 40 removed. Figure 4 is a cross-sectional view along line AA in Figure 3, and Figure 5 is a cross-sectional view along line BB in Figure 3. Figure 6 shows the side airbag device in a deployed state. Figure 7 is an enlarged view of the area around the suspension groove, showing the state before and after the airbag is deployed.

[0018] The vehicle seat S is a seat placed on the vehicle floor in which the vehicle's occupants sit. In this embodiment, the vehicle seat S is a front seat positioned at the front of the vehicle as a passenger seat. However, it is not limited to this, and the vehicle seat S may also be a driver's seat, or a rear seat positioned at the rear of the vehicle. Furthermore, in a vehicle equipped with three rows of seats in the front-to-back direction, it can be used as a second-row middle seat or a third-row rear seat.

[0019] As shown in Figure 1, the vehicle seat S comprises a seat back 1, a seat cushion 2, and a headrest 3. The seat back 1, seat cushion 2, and headrest 3 are sometimes collectively referred to as the seat body Sh. The seat back 1 and seat cushion 2 are connected by a reclining device 5. The vehicle seat S may also be equipped with a slide rail device (not shown) for moving the seat body Sh in the front-rear direction, and a rotation device (not shown) for rotating the seat body Sh around a vertical axis of rotation.

[0020] <Seat back 1> The seat back 1 is a backrest that supports the back of the seated person. The seat back 1 is a member that extends in a predetermined direction, for example, in a slightly rearward diagonal direction (direction of arrow E in Figure 1), and corresponds to the cushion portion of the vehicle seat S. In the direction of extension of the seat back 1, the side that connects to the seat cushion 2 is sometimes referred to as the inside, and the side that moves away from the seat cushion 2 is sometimes referred to as the outside. The seat back 1 has a seating portion 1a that directly supports the occupant, and a raised portion 1b positioned on the left and right sides of the seating portion 1a, which has a shape that bulges forward. The surface of the seating portion 1a that comes into contact with the occupant is referred to as the seating surface 1aa.

[0021] The seat back 1 mainly consists of a seat back frame 10 (see Figure 2) that forms the skeleton of the seat back 1, a back pad 30 that covers the seat back frame 10, and a surface covering 40 that covers the back pad 30. In addition, a side airbag device 20 is provided inside the seat back 1 of this embodiment. More specifically, the side airbag device 20 is located in the left side ridge portion 1b of the seat back 1 that is close to the vehicle door. The side airbag device 20 that is close to the vehicle door is called a near side airbag device. However, the location of the side airbag device 20 is not limited to this, and the side airbag device 20 may also be located in the right side ridge portion 1b of the seat back 1 that is closer to the center of the vehicle. The side airbag device 20 that is closer to the center of the vehicle is also called a center airbag device or a far side airbag device.

[0022] Furthermore, as shown in Figures 1 and 3, the seat back 1 is equipped with multiple vibration generating members 51 and air cells 52. The vibration generating members 51 are used, for example, to notify the occupant of the presence of a nearby vehicle by vibrating. The air cells 52 are devices that primarily knead the occupant's back.

[0023] Furthermore, as shown in Figure 3, the back pad 30 has a suspension groove 34 for suspending the outer skin 40. The outer skin 40 has a suspension member 41, and the suspension groove 34 is provided with a clip 35 for fixing the suspension member 41. The clip 35 corresponds to a fixing member.

[0024] The seat cushion 2 is a seating portion that supports the occupant's buttocks from below. The seat cushion 2 is a member provided to extend in a predetermined extending direction, specifically in the forward direction of the seat (direction of arrow D in Figure 1), and corresponds to the cushion portion of the vehicle seat S. In the extending direction of the seat cushion 2, the side that connects to the seat back 1 is sometimes referred to as the inside, and the side that moves away from the seat back 1 is sometimes referred to as the outside. The seat cushion 2 also has a seating portion 2a having a seating surface 2a that directly supports the occupant, and a raised portion 2b that is positioned on the left and right sides of the seating portion 2a and has an upwardly bulging shape.

[0025] The seat cushion 2 mainly consists of a seat cushion frame (not shown) which forms the skeleton of the seat cushion 2, a cushion pad 2c which covers the seat cushion frame, and a surface layer 2d which covers the cushion pad 2c.

[0026] The headrest 3 is positioned at the top of the seatback 1 and supports the occupant's head. The headrest 3 consists of a headrest pillar (not shown), a headrest pad, and a surface covering. The headrest pillar of the headrest 3 protrudes downward and extends downward. The protruding headrest pillar is held by a headrest holding part 15 (see Figure 2) provided on the seatback frame 10, thereby attaching the headrest 3 to the seatback 1.

[0027] The seat back 1 and the seat cushion 2 are connected by a reclining device 5. The reclining device 5 connects the seat back 1 to the seat cushion 2 so that it can rotate around a pivot axis 5a, and can lock the seat back 1 in a tilted position relative to the seat cushion 2 at a predetermined angle. By releasing the lock of the reclining device 5, the seat back 1 can be tilted forward or backward.

[0028] <Seat back frame 10> The seat body Sh of the vehicle seat S is supported by a frame F. In the frame F, the seat back frame 10, which forms the skeleton of the seat back 1, is formed in a frame shape as a whole, as shown in Figure 2, and comprises a pair of back side frames 11 arranged on the left and right, an upper frame 12, and a lower frame 13. The upper frame 12 connects the upper ends of the pair of back side frames 11. The upper frame 12 is provided with a pair of headrest holding parts 15 through which the headrest pillars (not shown) of the headrest 3 are inserted, as described above. In addition, a connecting frame 14 is provided separately from the upper frame 12, which connects the upper ends of the pair of back side frames 11. A wire 16 is provided that bridges the gap between the connecting frame 14 and the lower frame 13.

[0029] <Side airbag device 20> Furthermore, a side airbag device 20 is provided on the left side of the seat back frame 10. The position of this side airbag device 20 is just an example; depending on the position of the vehicle seat S inside the vehicle, the side airbag device 20 may be provided on the right side of the seat back frame 10.

[0030] The side airbag device 20 has a known configuration, which is schematically illustrated in Figures 4 to 6. The side airbag device 20 includes an airbag 21 that inflates when activated to protect the occupant, an inflator 22 that supplies gas to the airbag 21, and a case 23 that covers the airbag 21 and the inflator 22.

[0031] <Eidermis 40> The outer covering 40 is made of cloth, film, leather, etc., and is attached to cover the back pad 30 while being stretched to a predetermined tension. The detailed structure of the outer covering 40 that covers the back pad 30 of the seat back 1 will be explained with reference to Figure 4.

[0032] As shown in Figure 4, the outer covering 40 consists of a seat surface covering portion 40a, a ridge covering portion 40b, a side covering portion 40c, and a back covering portion 40d. The seat surface covering portion 40a is the part of the seat back 1 that covers the seat surface 1aa of the seat portion 1a that directly supports the back of the sitter. The ridge covering portion 40b is the part that mainly covers the surface of the ridge portion 1b of the seat back 1 that is on the sitter's side. The side covering portion 40c is the part that mainly covers the sides of the seat back 1, and the back covering portion 40d is the part that covers the back of the seat back 1.

[0033] <Suture section 44> The seat surface covering portion 40a and the ridge portion covering portion 40b are connected by a stitching portion 44 that is suspended in a suspension groove 34 formed between the seating portion 1a and the ridge portion 1b of the seat back 1. The stitching portion 44 forms a suspension line.

[0034] <Sewing section 42> The ridge covering portion 40b and the side covering portion 40c are connected by sewing near the front end of the ridge portion 1b, in other words, near the top of the ridge portion 1b. The portion connected by sewing (hereinafter referred to as the sewn portion 42) is the portion that ruptures when the airbag 21 deploys. The sewn portion 42 is provided along the extending direction of the seat back 1 (direction of arrow E in Figure 1). In other words, the sewn portion 42 is provided to extend along the vertical direction. The sewn portion 42 is also called a tear line.

[0035] <Vulnerable part 45> Furthermore, in the vehicle seat S of this embodiment, a weak point 45 is provided along the sewn portion 42. The weak point 45 is realized by perforations formed along the sewn portion 42. By forming a weak point 45 along the seam 42, the outer layer 40 tears along the weak point 45 when the airbag 21 deploys. Because the intended area tears early, the side airbag can be deployed properly.

[0036] The side covering portion 40c and the rear covering portion 40d are connected by a wire fastener 43 on the back of the seat back 1. That is, as shown in Figure 4, the rear covering portion 40d connects the right side covering portion 40c and the left side covering portion 40c of the seat back 1.

[0037] Furthermore, the surface material 2d of the seat cushion 2 is made of fabric, film, leather, etc., similar to the surface material 40, and is attached to cover the cushion pad 2c while being stretched to a predetermined tension.

[0038] <Suspension member 41> A suspension member 41 is attached to the seam 44 (suspension line) between the seat covering portion 40a and the embankment covering portion 40b. As shown in Figure 4, the suspension member 41 has a bulging tip, and its base is connected to the sutured portion 44 of the skin 40 by sewing. The suspension member 41 can be fixed to the clip 35 by inserting the tip of the suspension member 41 into the clip 35 located in the suspension groove 34. The portion extending from the skin 40 is referred to as the extension portion 41a, and the tip portion is referred to as the engagement portion 41b.

[0039] As shown in the left diagram of Figure 7, the extension portion 41a of the suspension member 41 is folded in its normal state and partially sewn to a predetermined length. The sewn portion of the extension portion 41a is referred to as the sutured portion 41c. This sutured portion 41c is configured to break when the airbag 21 of the side airbag device 20 is deployed, and as shown in the right diagram of Figure 7, the length of the entire extension portion 41a is extended. In other words, when the airbag 21 is deployed, the suspension member 41 becomes longer, which allows it to absorb the energy applied to the clip 35 that secures the suspension member 41 when the airbag is deployed. Because the energy applied when the airbag is deployed is absorbed, the load on the clip 35 is reduced.

[0040] The suspension member 41 is made of resin. This is just one example; the extension portion 41a of the suspension member 41 may be made of cloth, nonwoven fabric, or the like to make it foldable. Alternatively, the extension portion 41a of the suspension member 41 may be made of a rubber-like elastic material to allow it to extend.

[0041] <Backpad 30> The back pad 30 has a cushioning portion formed by foam and is entirely covered by the outer skin 40. The back pad 30 corresponds to the pad of the present invention. The back pad 30 is made of a urethane pad that has been foam-molded using, for example, polyurethane foam.

[0042] The back pad 30 has a dividing section 7 formed in the ridge portion 1b that divides the back pad 30. The dividing section 7 is formed in the ridge portion 1b of the back pad 30 by a slit extending in the front-rear direction. In other words, the dividing section 7 is formed along a plane perpendicular to the extending direction of the back pad 30 on the seating surface 1aa side of the ridge portion 1b of the back pad 30. Specifically, in Figure 5, the area of ​​the back pad 30 shown by the diagonal lines is separated by the dividing section 7. By forming the dividing section 7 in the back pad 30, when the airbag deploys, as shown in Figure 6, the back pad 30 of the ridge portion 1b can be easily moved by the airbag 21 clockwise in Figure 6 (direction of arrow G in Figure 6) with the suspension groove 34, which will be described later, as the central axis.

[0043] In this embodiment, the dividing portion 7 has a first slit 31 and a second slit 32 that are spaced apart vertically. The first slit 31 is located above the upper end of the side airbag device 20. The second slit 32 is located below the lower end of the side airbag device 20. In other words, the first slit 31 and the second slit 32 are spaced apart in the extending direction of the seat back 1. The first slit 31 is located outside the outer end of the side airbag device 20 in the extending direction of the seat back 1 (direction of arrow E in Figure 1), and the second slit 32 is located inside the inner end of the side airbag device 20 in the extending direction of the seat back 1. The first slit 31 corresponds to the first dividing portion, and the second slit 32 corresponds to the second dividing portion.

[0044] By providing a first slit 31 and a second slit 32 in the back pad 30, the dam portion 1b can be rotated efficiently when the airbag deploys. Furthermore, intermittent cuts may be formed in the skin 40 along the first slit 31 and the second slit 32.

[0045] Furthermore, as shown in Figures 1 and 4, the dividing section 7 has a third slit 33 that connects the first slit 31 and the second slit 32 and extends in the vertical direction. In other words, the third slit 33 is formed to extend in the direction of extension of the seat back 1. The third slit 33 corresponds to the third dividing section. The third slit 33 is also a vulnerable part of the back pad 30. The presence of the third slit 33 makes it easier for the dam to separate when the airbag deploys, allowing the dam to rotate more efficiently.

[0046] <Suspension groove 34> As shown in Figures 3 and 4, the back pad 30 has a suspension groove 34 for suspending the upholstery 40. The suspension groove 34 is positioned at the boundary between the seating portion 1a and the ridge portion 1b so as to extend in the vertical direction of the seat (longitudinal direction, the direction in which the seat back 1 extends). The suspension groove 34 may also be formed to extend in the width direction of the seat, not just in the vertical direction. Furthermore, the suspension groove 34 has a first wall 34a and a second wall 34b facing the first wall 34a. Within the suspension groove 34, the first wall 34a is on the side of the embankment 1b, and the second wall 34b is on the side of the seating area 1a.

[0047] <Clip 35> Inside the suspension groove 34, multiple clips 35 are arranged at predetermined intervals along the suspension groove 34 to suspend the suture portion 44 of the epidermis 40. As shown in Figure 4, the clips 35 have a roughly V-shaped cross-section and are configured to hold the suspension member 41 provided at the tip of the suture portion 44. The clips 35 may also have a U-shaped or C-shaped cross-section.

[0048] Furthermore, the clip 35 is made of resin, and is formed from, for example, polyacetal (POM) resin, polypropylene (PP) resin, polyamide (PA) resin, polycarbonate (PC) resin, etc. The clip 35 may also be formed from polyacetal (POM) resin, which has relatively high strength.

[0049] As shown in Figures 4 and 5, the clip 35 is sandwiched between the first wall 34a and the second wall 34b of the suspension groove 34 and is fixed to the suspension groove 34 by partially embedding it in the bottom of the suspension groove 34. As shown in the right-hand diagram of Figure 7, when the airbag 21 deploys, the embankment portion 1b rotates inward towards the seat around the suspension groove 34, pushed by the airbag 21. At that time, the front portions of the first wall 34a and the second wall 34b move closer together. As the first wall 34a and the second wall 34b move closer together, the clip 35 is clamped. In this way, the clip 35 can be supported when the airbag deploys, thus reducing the load on the clip 35.

[0050] The rear end of the back surface of the back pad 30 in the embankment section 1b is located behind the bottom of the suspension groove 34. Furthermore, the side airbag device 20 is positioned within the ridge portion 1b, slightly to the outside of the center in the seat width direction of the ridge portion 1b, and the suspension member 41 of the upholstery 40 is positioned closer to the inside. This configuration makes it easier for the ridge portion 1b of the seatback 1 to rotate around the suspension groove 34 when the airbag deploys.

[0051] Although the vehicle seat S of this embodiment is equipped with a side airbag device 20, it is not provided with a reinforcing fabric to guide the airbag 21. If no reinforcing fabric is provided, a large load may be placed on the clip 35 when the airbag 21 is deployed. However, by forming a divided section 7 in the embankment 1b, the embankment 1b rotates around the suspension groove 34 when the airbag 21 is deployed, and the first wall 34a and the second wall 34b of the suspension groove 34 come into close proximity to support the clip 35. As a result, the load on the clip 35 is reduced. Furthermore, in a vehicle seat S equipped with a side airbag device 20, since no reinforcing fabric is provided, the number of parts and manufacturing processes are reduced, thereby lowering manufacturing costs.

[0052] <Vibration generating member 51> As described above, the vehicle seat S is provided with multiple vibration generating members 51. More specifically, as shown in Figures 1 and 3, two vibration generating members 51 are arranged on the seating portion 1a, and one vibration generating member 51 is arranged on each of the embankment portions 1b provided on the left and right sides of the seating portion 1a. Each of the vibration generating members 51 is positioned at the same height.

[0053] The vibration generating member 51 consists of an eccentric motor and functions as a notification means for the seated person by generating vibrations that the seated person can perceive. For example, when the vibration generating member 51 detects that danger is approaching the moving vehicle, it generates vibrations to notify the seated person of the impending danger. The vibration generating member 51 has multiple vibration patterns with parameters such as vibration intensity, frequency, or vibration duration, and can provide various notifications to the seated person.

[0054] <AirCell 52> Furthermore, the seat portion 1a of the seatback 1 is provided with multiple air cells 52, specifically seven air cells 52. The air cells 52 are fluid cells provided, for example, to knead the back of the sitter. As shown in Figures 1 and 3, two air cells 52 are arranged on the seat portion 1a of the seatback 1, two air cells 52 are arranged on the right-side ridge portion 1b, and three air cells 52 are arranged on the left-side ridge portion 1b.

[0055] The air cell 52 is a device that presses against the back of the seated person by inflating it with compressed air (an example of a fluid) sealed inside, thereby pushing out the back pad 30 or skin 40 located in front of it. This kneads the seated person's back, for example, promoting blood circulation. Each air cell 52 is connected to an actuator (not shown) and a tube that blows air. The number and arrangement of the air cells 52 are examples only and are not limited thereto. That is, eight or more or six or fewer air cells 52 may be arranged.

[0056] The vehicle seat S according to this embodiment has been described above with reference to the figures. An example of application to the seat back 1 of the vehicle seat S has been shown, but the present invention may also be applied to a seat cushion 2 equipped with a cushion side airbag device 60. That is, a dividing section 7 may be provided in the ridge portion 2b of the seat cushion 2, and rotated around the suspension groove when the airbag is deployed. In this case, the dividing section 7 may be composed of a first slit 61 and a second slit 62 spaced apart in the front-rear direction of the seat (the extending direction of the seat cushion 2), and a third slit 63 connecting the first slit 61 and the second slit 62.

[0057] Furthermore, although the vehicle seat S of this embodiment is mounted on a vehicle, the present invention is not limited to seats mounted on ground-running vehicles with wheels, such as automobiles and trains, but can also be applied to seats mounted on aircraft, ships, and other vehicles that move on surfaces other than the ground. [Explanation of Symbols]

[0058] S Vehicle Seat Sh Seat Body 1. Seat back (cushion part) 1a Seating area 1aa Seat surface 1b Embankment 2. Seat cushion (cushion part) 2a Seating area 2aa seating surface 2b Embankment 2c Cushion Pad 2d epidermis 3 Headrests 5. Reclining device 5a Rotating shaft 7. Divided section F Frame 10 Seat back frame 11. Backside frame 12 Upper Frame 13 Lower Frame 14 connecting frames 15 Headrest retaining part 16 wires 20 Side airbag system 21 Airbags 22 Inflators 23 cases 30 Backpad 31 First slit (first division point) 32 Second slit (second division point) 33 Third slit (third division point) 34 Hanging groove 34a First wall 34b Second wall 35 Clips (fixing components) 40 Epidermis 40a Seat cover part 40b Bank covering part 40c Side covering 40d Rear cover part 41 Suspension member 41a Extension 41b Engagement part 41c Suture section 42 Sewing section 43-line fastener 44 Suture section 45 Vulnerable parts 51 Vibration generating member 52 Air Cells 60 Side airbag system for cushioning 61 First slit (first division point) 62 Second slit (second division point) 63 Third slit (third division point)

Claims

1. The cushion part, The cushion portion includes a side airbag device that houses the airbag, The aforementioned cushion part is A seating area having a seating surface, A raised portion located on the side of the seating portion and bulging out toward the seating surface, pads and, The pad has an outer layer that covers it, The pad has a suspension groove formed between the seating portion and the embankment portion for suspending the surface material. The aforementioned skin has a suspension member, The aforementioned suspension groove consists of a first wall and a second wall opposite the first wall. The suspension groove is provided with a fixing member for fixing the suspension member of the skin, Of the embankment portion of the cushion portion, on the seating surface side, a divided portion is formed along a plane perpendicular to the extending direction of the cushion portion. When the airbag deploys, the embankment portion separated by the dividing portion rotates around the suspension groove, causing the first wall and the second wall to come into close proximity to support the fixing member. A vehicle seat characterized in that the cushion portion is not provided with a reinforcing fabric for guiding the deployment direction of the airbag.

2. The dividing portion consists of a first dividing portion and a second dividing portion that are separated in the direction of extension of the cushion portion. The first dividing portion is positioned outside the outer end of the side airbag device in the extending direction of the cushion portion. The vehicle seat according to claim 1, characterized in that the second dividing portion is positioned inward from the inner end of the side airbag device in the extending direction of the cushion portion.

3. The vehicle seat according to claim 2, characterized in that the dividing portion has a third dividing portion that connects the first dividing portion and the second dividing portion and extends along the extending direction of the cushion portion.

4. The vehicle seat according to claim 1, characterized in that the suspension member of the surface is configured to be extendable when the airbag is deployed.

5. The suspension member has an extension portion extending from the skin and an engagement portion at the tip of the extension portion that engages with the fixing member. The extended portion is sewn in part so that it is folded to a predetermined length under normal circumstances. The vehicle seat according to claim 4, characterized in that the stitching ruptures and stretches when the airbag is deployed.

6. The vehicle seat according to claim 1, characterized in that the surface has a sewn portion provided along the extending direction of the cushion portion near the top of the embankment portion and a weak portion formed along the sewn portion.

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