Vehicle seats

Abstract

The present invention provides a vehicle seat that can inflate multiple air bladders into various configurations. [Solution] The vehicle seat 1 has a cushioning material 11 covered with a surface material 12. The vehicle seat 1 includes a plurality of air sacs 20 provided between the cushioning material 11 and the surface material 12, which are first air sacs 20A and second air sacs 20B. The plurality of first air sacs 20A and the plurality of second air sacs 20B are arranged independently on the cushioning material 11 side and the surface material 12 side so that at least a portion of them overlap.

Description

Technical Field

[0001] The present invention relates to a vehicle seat.

Background Art

[0002] In recent years, efforts have been actively made to provide access to a sustainable transportation system that takes into account people in vulnerable positions such as the elderly, disabled, and children among traffic participants. Toward this realization, research and development focusing on further improving traffic safety and convenience through the development of vehicle habitability has been underway.

[0003] For example, as a vehicle seat, one in which a plurality of airbags are provided inside a seat cushion or the like is known. The plurality of airbags are formed in a substantially circular shape in plan view and are arranged in two rows in the front-rear direction along the seat cushion or the like. According to this vehicle seat, by inflating the plurality of airbags and pressing a part of the driver's body, it is possible to relax (refresh) or awaken the driver (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional vehicle seat, the plurality of airbags are formed in a substantially circular shape in plan view and are arranged in two rows in the front-rear direction along the seat cushion or the like. Therefore, the conventional vehicle seat cannot inflate the plurality of airbags into various forms due to the arrangement, shape, etc. of the plurality of airbags.

[0006] This invention aims to solve the above-mentioned problems by enabling the inflation of multiple air bladders into various forms. Ultimately, it contributes to the development of sustainable transportation systems. [Means for solving the problem]

[0007] To solve the aforementioned problems, the present invention proposes the following means. (1) The vehicle seat according to the present invention is a vehicle seat (for example, vehicle seat 1 of the embodiment) in which a cushioning material (for example, cushioning material 11 of the embodiment) is covered with a surface material (for example, surface material 12 of the embodiment), and comprises a plurality of air vents (for example, a plurality of air vents 20, 52 of the embodiment) provided between the cushioning material and the surface material, wherein the plurality of air vents are independently arranged on the cushioning material side and the surface material side such that at least a portion of them overlap.

[0008] Here, multiple air bladders can be provided, for example, in a vehicle seat, in at least one of the seat cushion and the seat back. The multiple air bladders are independently arranged so that at least a portion of them overlap on the cushion material side and the surface material side. Therefore, it is possible to inflate only the air bladders on the cushion material side, or only the air bladders on the surface material side, or even both the cushion material side and the surface material side simultaneously. This allows the multiple air bladders to be inflated into a variety of shapes.

[0009] (2) In the above embodiment, the plurality of air bags include large-diameter air bags (for example, first air bags 20A, 52A in the embodiment) and small-diameter air bags (for example, second air bags 20B, 52B in the embodiment), and the large-diameter air bags and the small-diameter air bags may be arranged independently such that at least a portion of them overlap.

[0010] This configuration allows for the independent placement of large-diameter and small-diameter air bladders, with at least a portion overlapping. Therefore, for example, when multiple air bladders are provided in a seat cushion, inflating only the large-diameter air bladders keeps the seated occupant appropriately elevated from the cushioning material. This helps to strengthen the occupant's core muscles. Furthermore, inflating only the large-diameter air bladders distributes the pressure on the seated occupant. This helps to suppress pain caused by reduced blood flow to the seated occupant.

[0011] Furthermore, by inflating only small-diameter air bladders, localized surface pressure can be generated under the seated occupant's buttocks and thighs. This can suppress drowsiness in the seated occupant. In addition, a massage effect can be obtained by improving blood flow to the seated occupant. In addition, by inflating both large-diameter and small-diameter air bladders, it is possible to raise the seat height in, for example, sports vehicles, thereby improving ease of entry and exit.

[0012] (3) In the above embodiment, the small-diameter air bag may be placed on the surface material side.

[0013] This configuration allows the smaller diameter air bladders to be positioned on the surface material side. Therefore, for example, if multiple air bladders are provided in the seat cushion, the smaller diameter air bladders can be positioned closer to the seated occupant. This allows the seated occupant to feel the stimulation from the smaller diameter air bladders more appropriately.

[0014] (4) In the above embodiment, the plurality of air bags may be formed in a tubular shape with their tip ends (for example, tip ends 20Aa, 20Ba in the embodiment) closed, and have air inlets and outlets (for example, first inlet / outlet 22, second inlet / outlet 25 in the embodiment) at their base ends (for example, base ends 20Ab, 20Bb in the embodiment).

[0015] By configuring it in this way, a plurality of air bags are formed in a tubular shape, and an air inlet / outlet is provided at the base end portion of the air bag. Therefore, when supplying air to the air bag from the inlet / outlet, it can be inflated so that undulations ripple from the base end portion to the tip end portion of the air bag. Further, when discharging the air in the air bag from the inlet / outlet, it can be contracted so that undulations ripple from the base end portion to the tip end portion of the air bag. As a result, when the seated occupant inflates and contracts the air bag, the occupant can more appropriately and strongly feel the stimulation by the air bag.

Effects of the Invention

[0016] According to the present invention, a plurality of air bags can be inflated into various forms.

Brief Description of the Drawings

[0017] [Figure 1] It is a perspective view of a vehicle seat in the first embodiment of the present invention. [Figure 2] It is a schematic side view showing an air bag unit provided in the vehicle seat in the first embodiment. [Figure 3] It is a schematic side view showing a state in which the first air bag and the second air bag of the air bag unit in the first embodiment are inflated. [Figure 4] It is a schematic perspective view showing the air bag unit in the first embodiment. [Figure 5] It is a schematic front view of the first air bag in the first embodiment as viewed from the front of the vehicle. [[ID=二十九]] [Figure 6] It is a schematic front view of the second air bag in the first embodiment as viewed from the front of the vehicle. [Figure 7] It is a schematic side view showing a state in which the first air bag in the first embodiment is inflated. [Figure 8] It is a schematic side view showing a state in which the second air bag in the first embodiment is inflated. [Figure 9] It is a schematic side view showing an air bag unit in the second embodiment of the present invention. [Figure 10] It is a schematic side view showing a state in which the first air bag in the second embodiment is inflated. [Figure 11] It is a schematic side view showing the state in which the second airbag in the second embodiment is inflated.

Mode for Carrying Out the Invention

[0018] Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to the drawings. In the embodiment, an example in which the vehicle seat is arranged facing the vehicle front direction will be described. Further, an example in which the seat cushion of the vehicle seat is raised downward and the seat back is raised upward will be described. In the figure, the front is indicated by an arrow F and the rear is indicated by an arrow R. The upper side is indicated by an arrow U and the lower side is indicated by an arrow D. The direction orthogonal to the vehicle front direction and the vertical direction will be described as the vehicle width direction. The orientation in which the vehicle seat 1 is arranged is not limited to the vehicle front direction and can be arbitrarily selected.

[0019] [First Embodiment] <Vehicle Seat> As shown in FIGS. 1 and 2, the vehicle seat 1 includes, for example, a seat cushion 2, a seat back 3, a headrest 4, and an airbag unit 5. The seat cushion 2 supports the buttocks and thighs of the occupant 8 seated on the vehicle seat 1. The seat cushion 2 has a cushion material 11 covered with a surface material 12. Hereinafter, the occupant 8 seated on the vehicle seat 1 may be referred to as the "seated occupant 8".

[0020] The seat back 3 is raised upward from the rear end portion of the seat cushion 2. The seat back 3 supports the waist and back of the seated occupant 8. The seat back 3 has a cushion material (not shown) covered with a surface material 14. The headrest 4 is provided at the upper end portion of the seat back 3. The headrest 4 supports the head of the seated occupant 8.

[0021] <Airbag Unit><000As shown in Figures 2 and 3, the air bladder unit 5 is provided, for example, on the seat cushion 2. Here, Figure 2 shows the air bladder unit 5 in a deflated state. Figure 3 shows the air bladder unit 5 in an inflated state. In this embodiment, an example in which the air bladder unit 5 is provided only on the seat cushion 2 is described, but the air bladder unit 5 may be provided on both the seat cushion 2 and the seat back 3. Alternatively, the air bladder unit 5 may be provided only on the seat back 3.

[0022] The air bag unit 5 comprises a plurality of air bags 20. The plurality of air bags 20 are provided in the seat cushion 2 between the cushioning material 11 and the surface material 12. Specifically, the plurality of air bags 20 include a plurality of large-diameter air bags 20A and a plurality of small-diameter air bags 20B. In Figure 3, for convenience, the large-diameter air bags 20A are shown placed inside the cushioning material 11 (both of which will be described later).

[0023] "Large diameter" refers to a state where, when the large-diameter air bag 20A and the small-diameter air bag 20B are inflated to a circular cross-section, the outer diameter of the large-diameter air bag 20A is larger than the outer diameter of the small-diameter air bag 20B. In this state, the large-diameter air bag 20A has a greater inflation height (inflation thickness) when inflated compared to the small-diameter air bag 20B. Furthermore, "large diameter" also includes the state where, when the large-diameter air bag 20A and the small-diameter air bag 20B are inflated to an elongated hole shape such as an elliptical cross-section, the inflation height of the large-diameter air bag 20A is greater than the inflation height (inflation thickness) of the small-diameter air bag 20B. Hereinafter, the inflation height of the large-diameter air bag 20A may be referred to as the "first inflation height," and the inflation height of the small-diameter air bag 20B may be referred to as the "second inflation height."

[0024] "Small diameter" refers to a state where, when both the large-diameter air bag 20A and the small-diameter air bag 20B are inflated to a circular cross-section, the outer diameter of the small-diameter air bag 20B is smaller than the outer diameter of the large-diameter air bag 20A. In this state, the inflation height of the small-diameter air bag 20B is smaller than that of the large-diameter air bag 20A. Furthermore, "small diameter" also includes the state where, when both the large-diameter air bag 20A and the small-diameter air bag 20B are inflated to an elongated hole shape such as an elliptical cross-section, the second inflation height of the small-diameter air bag 20B is smaller than the first inflation height of the large-diameter air bag 20A. Here, "first inflation height" and "second inflation height" refer to the height in the vertical direction from the cushioning material 11 toward the surface material 12. Hereafter, the large-diameter air bag 20A may be referred to as "first air bag 20A," and the small-diameter air bag 20B as "second air bag 20B."

[0025] In the diagram, the inflated state of the first air bag 20A and the second air bag 20B is shown with a circular cross-section. However, the weight of the seated occupant 8 acts on the first air bag 20A and the second air bag 20B from above. Therefore, it is conceivable that the multiple first air bags 20A and the multiple second air bags 20B will inflate into a roughly elliptical shape that is flattened in the vertical direction.

[0026] As shown in Figures 3 and 4, the multiple first air bags 20A are positioned on the cushioning material 11 side between the cushioning material 11 and the surface material 12 (see Figure 2). The first air bags 20A are formed in a tubular shape. Specifically, the first air bags 20A are formed in a tubular shape by sealing the outer circumference of two sheet materials with a fiber layer sandwiched in between. Examples of materials for the first air bags 20A include thermoplastic soft polyvinyl chloride, urethane-based thermoplastic elastomer, olefin-based thermoplastic elastomer, polyester-based thermoplastic elastomer, and rubber. The air bags 20A may also be constructed by laminating thermoplastic soft polyvinyl chloride, urethane-based thermoplastic elastomer, olefin-based thermoplastic elastomer, polyester-based thermoplastic elastomer, and rubber to the inside of a fiber layer.

[0027] The first air bag 20A has a closed tip 20Aa and a first air inlet / outlet (inlet / outlet) 22 at its base end 20Ab. Multiple first air bags 20A extend along the surface of the cushioning material 11 in the vehicle width direction. Multiple first air bags 20A are arranged in parallel in the front-rear direction along the surface of the cushioning material 11 between the front end 2a and the rear end 2b of the seat cushion 2.

[0028] As shown in Figures 4 and 5, the multiple first air bags 20A are, for example, connected to a first flow path 23, each having a first inlet / outlet 22. The first flow path 23 is connected to an air pump (not shown). The multiple first air bags 20A are filled with air supplied from the air pump through the first flow path 23, as indicated by arrow A. Thus, the multiple first air bags 20A inflate continuously. The air from each of the multiple first air bags 20A is discharged through the first channel 23 via the first inlet / outlet 22 as shown by arrow B. Therefore, the multiple first air bags 20A deflate in succession.

[0029] As shown in Figures 3 and 4, the multiple second air bags 20B are arranged along the surface material 12 (see Figure 2) between the cushioning material 11 and the surface material 12. That is, the multiple second air bags 20B are arranged between the multiple first air bags 20A and the surface material 12. The second air bags 20B are formed in a tubular shape. Specifically, the second air bags 20B are formed in a tubular shape by sealing the outer periphery of two sheet materials with a fiber layer sandwiched in between. Examples of materials for the second air bags 20B include thermoplastic soft polyvinyl chloride, urethane-based thermoplastic elastomer, olefin-based thermoplastic elastomer, polyester-based thermoplastic elastomer, and rubber. The air bag 20B may also be composed of a fiber layer with thermoplastic soft polyvinyl chloride, urethane-based thermoplastic elastomer, olefin-based thermoplastic elastomer, polyester-based thermoplastic elastomer, rubber, etc., laminated to the inside.

[0030] The second air bag 20B has a closed tip 20Ba and a second air inlet / outlet (inlet / outlet) 25 at its base end 20Bb. Multiple second air bags 20B extend in the vehicle width direction along the lower surface of the surface material 12 and the multiple first air bags 20A. Multiple second air bags 20B are arranged in parallel in the front-rear direction along the lower surface of the surface material 12 between the front end 2a and rear end 2b of the seat cushion 2.

[0031] As shown in Figures 4 and 6, multiple second air bags 20B are connected, for example, to a second flow path 26, each second inlet 25 of which is connected in a continuous manner. The second flow path 26 is connected to an air pump (not shown). Multiple second air bags 20B are filled with air supplied from the air pump through each second inlet 25 as indicated by arrow C. Therefore, multiple second air bags 20B inflate in a continuous manner. Furthermore, the air from each of the multiple second air bags 20B is discharged through the second flow path 26 via the second inlet / outlet 25 as indicated by arrow D. Therefore, the multiple second air bags 20B deflate in succession.

[0032] Here, as shown in Figure 4, the multiple first air bags 20A and the multiple second air bags 20B are provided independently. That is, the multiple first inlets 22 and the multiple second inlets 25 are provided independently. Therefore, the multiple first air bags 20A and the multiple second air bags 20B can be inflated and deflated independently.

[0033] As shown in Figures 2 and 3, the multiple first air bags 20A are arranged along the upper surface of the cushioning material 11. The multiple second air bags 20B are arranged above the multiple first air bags 20A, along the lower surface of the surface material 12. The multiple second air bags 20B are arranged so that at least a portion of them overlap the multiple first air bags 20A from above.

[0034] In other words, the multiple second air bags 20B may be arranged entirely on top of the multiple first air bags 20A, or partially on top of each other. When some of the multiple second air bags 20B are arranged on top of the multiple first air bags 20A, the front second air bag 20B may be placed in front of the multiple first air bags 20A, and the remaining second air bags 20B may be placed on top of the multiple first air bags 20A. Alternatively, the rear second air bag 20B may be placed behind the multiple first air bags 20A, and the remaining second air bags 20B may be placed on top of the multiple first air bags 20A.

[0035] <Example of air bag unit operation> As shown in Figure 7, the air bag unit 5 maintains a state in which multiple first air bags 20A are inflated and multiple second air bags 20B are deflated. Note that in Figure 7, the large-diameter air bag 20A is shown placed inside the cushioning material 11 (both of which will be described later) for convenience. The multiple first air bags 20A are inflated to a first inflation height of 30 mm to 50 mm in a range of 20 cm to 25 cm behind the front end 2a of the seat cushion 2. Therefore, the seated occupant 8 can be appropriately lifted above the cushioning material 11. This allows the seated occupant 8's core muscles to be strengthened. In addition, by inflating only the first air bladder 20A, the body pressure on the seated occupant 8 can be distributed. Therefore, pain caused by reduced blood flow to the seated occupant 8 can be suppressed.

[0036] As shown in Figure 8, the air bladder unit 5 maintains a state in which multiple first air bladder bags 20A are deflated and multiple second air bladder bags 20B are inflated. In Figure 8, for convenience, the large-diameter air bladder bag 20A is shown placed inside the cushion material 11 (both of which will be described later). The multiple second air bladder bags 20B are inflated, for example, within a range of 20 cm behind the front end 2a of the seat cushion 2, within a range of 5 minutes or less. Therefore, localized surface pressure can be generated under the buttocks and thighs of the seated occupant 8. This can suppress drowsiness in the seated occupant 8. Furthermore, multiple second air bladders 20B can, for example, inflate and deflate repeatedly for 5 minutes or more at intervals of 2 seconds or more and 3 seconds or less, within a range of 20 cm behind the front end 2a of the seat cushion 2. Thus, a massage effect can be obtained by improving blood flow to the seated occupant 8.

[0037] As shown in Figure 3, the air bag unit 5 maintains a state in which multiple first air bags 20A are inflated and multiple second air bags 20B are inflated. The multiple first air bags 20A are inflated to a first inflation height of, for example, 30 mm or more and 50 mm or less. The multiple second air bags 20B are inflated to a second inflation height of, for example, 20 mm or less. Therefore, the total inflation height, which is the sum of the first and second inflation heights, is, for example, 30 mm or more and 70 mm or less. This allows the seat surface of the seat cushion 2 to be raised, which can improve ease of entry and exit in, for example, sports vehicles.

[0038] As shown in Figures 2 and 4, the vehicle seat 1 according to the first embodiment described above has multiple first air bags 20A and multiple second air bags 20B arranged independently such that at least a portion of them overlap on the cushioning material 11 side and the surface material 12 side. Therefore, it is possible to inflate only the first air bags 20A on the cushioning material 11 side, or to inflate only the second air bags 20B on the surface material 12 side. Furthermore, it is possible to inflate both the first air bags 20A and the second air bags 20B. This makes it possible to inflate the multiple air bags 20 into various shapes.

[0039] As shown in Figure 7, the first air bladder 20A and the second air bladder 20B are arranged independently so that at least a portion of them overlap. Therefore, for example, by inflating only the first air bladder 20A, the seated occupant 8 can be kept appropriately elevated from the cushioning material 11. This allows the occupant's core muscles to be strengthened. In addition, by inflating only the first air bladder 20A, the body pressure on the seated occupant 8 can be distributed. Therefore, pain caused by reduced blood flow to the seated occupant 8 can be suppressed.

[0040] As shown in Figure 8, by inflating only the second air bladder 20B, localized surface pressure can be generated under the buttocks and thighs of the seated occupant 8. Therefore, the seated occupant 8 can appropriately feel the stimulation from the second air bladder 20B. This can suppress drowsiness in the seated occupant 8. Furthermore, a massage effect can be obtained by improving blood flow under the seated occupant 8's buttocks.

[0041] In addition, as shown in Figure 3, by inflating both the first air bag 20A and the second air bag 20B, the seat surface of the seat cushion 2 can be raised, which can improve ease of entry and exit in, for example, sports vehicles.

[0042] As shown in Figure 8, the second air bladder 20B is positioned on the surface material 12 side. Therefore, for example, the second air bladder 20B can be positioned closer to the seated occupant 8. As a result, the seated occupant 8 can feel the stimulation from the inflated second air bladder 20B more appropriately.

[0043] As shown in Figures 2, 4, and 5, the first air bag 20A is formed in a tubular shape, and a first air inlet / outlet 22 is provided at the base end 20Ab of the first air bag 20A. Therefore, when supplying air to the first air bag 20A from the first inlet / outlet 22, the first air bag 20A can be inflated in a wave-like manner from the base end 20Ab to the tip end 20Aa. When discharging air from the first air bag 20A from the first inlet / outlet 22, the first air bag 20A can be contracted in a wave-like manner from the base end 20Ab to the tip end 20Aa. As a result, the seated occupant 8 can feel the stimulation from the first air bag 20A more appropriately and strongly when the first air bag 20A is inflated and deflated.

[0044] As shown in Figures 2, 4, and 6, the second air bag 20B is formed in a tubular shape, and a second air inlet / outlet 25 is provided at the base end 20Bb of the second air bag 20B. Therefore, when supplying air to the second air bag 20B from the second inlet / outlet 25, the second air bag 20B can be inflated in a wave-like manner from the base end 20Bb to the tip end 20Ba. When discharging air from the second air bag 20B from the second inlet / outlet 25, the second air bag 20B can be contracted in a wave-like manner from the base end 20Bb to the tip end 20Ba. As a result, the seated occupant 8 can feel the stimulation from the second air bag 20B more appropriately and strongly when the second air bag 20B is inflated and deflated.

[0045] [Second Embodiment] Next, the air bag unit of the second embodiment will be described with reference to Figures 9 to 11. In the second embodiment, the same or similar components as those in the air bag unit 5 of the first embodiment are denoted by the same reference numerals, and detailed explanations are omitted.

[0046] As shown in Figure 9, the air bag unit 50 comprises a plurality of air bags 52. The plurality of air bags 52 are provided between the cushioning material 11 and the surface material 12 in the seat cushion 2. Specifically, the plurality of air bags 52 include a large-diameter air bag 52A and a plurality of small-diameter air bags 52B. One large-diameter air bag 52A is included in the plurality of air bags 52. Hereinafter, the large-diameter air bag 52A may be referred to as the "first air bag 52A," and the small-diameter air bag 52B may be referred to as the "second air bag 52B."

[0047] The first air bag 52A is positioned between the cushioning material 11 and the surface material 12 (see Figure 2), with one air bag on the cushioning material 11 side. The first air bag 52A is formed to expand into, for example, a long-slot cross-section (see Figure 11). The expansion height of the first air bag 52A is set to be greater than that of the second air bag 20B. The other components of the first air bag 52A are the same as those of the first air bag 20A. The first air bladder 52A extends in the vehicle width direction along the surface of the cushioning material 11. The first air bladder 52A is positioned along the surface of the cushioning material 11 between the front end 2a and the rear end 2b of the seat cushion 2.

[0048] The second air bag 52B is the same air bag as the second air bag 20B. The multiple second air bags 52B extend in the direction of the vehicle width. The multiple second air bags 52B are arranged along the surface material 12 between the cushion material 11 and the surface material 12, similar to the multiple second air bags 20B. That is, the multiple second air bags 52B are arranged between the multiple first air bags 52A and the surface material 12. The multiple second air bags 52B are arranged in parallel in the front-rear direction along the lower surface of the surface material 12 between the front end 2a and the rear end 2b of the seat cushion 2.

[0049] Here, one first air bag 20A and multiple second air bags 20B are arranged so that at least a portion of them overlap in the vertical direction. The first air bag 52A and multiple second air bags 52B are provided independently. Therefore, the first air bag 52A and the multiple second air bags 52B can be inflated and deflated independently.

[0050] <Example of air bag unit operation> As shown in Figure 10, the air bladder unit 50 is kept in a state where one first air bladder 52A is inflated and multiple second air bladder 52B are deflated. One first air bladder 52A is inflated to, for example, a first inflation height. This allows the seated occupant 8 (see Figure 2) to be appropriately lifted above the cushioning material 11. This helps to strengthen the core muscles of the seated occupant 8. Furthermore, by inflating only the first air bladder 52A, the body pressure on the seated occupant 8 can be distributed. This helps to suppress pain caused by reduced blood flow to the seated occupant 8.

[0051] As shown in Figure 11, the air bladder unit 50 maintains a state in which one first air bladder 52A is deflated and multiple second air bladder bags 52B are inflated. The multiple second air bladder bags 52B are inflated, for example, within a range of 5 minutes. This makes it possible to generate localized surface pressure under the buttocks and thighs of the seated occupant 8 (see Figure 2). This helps to suppress drowsiness in the seated occupant 8. Furthermore, multiple second air bladders 52B can, for example, repeatedly inflate and deflate at intervals of 2 seconds or more and 3 seconds or less for 5 minutes or more. Therefore, a massage effect can be obtained by improving blood flow to the seated occupant 8.

[0052] Furthermore, the air bag unit 50 maintains a state in which one first air bag 52A is inflated and multiple second air bags 52B are inflated. The one first air bag 52A is inflated to, for example, a first inflation height. The multiple second air bags 52B are inflated to, for example, a second inflation height. Therefore, the inflation height of the air bag unit 50 becomes the sum of the first inflation height and the second inflation height. This allows the seat surface of the seat cushion 2 to be raised, which can improve ease of entry and exit in, for example, sports vehicles.

[0053] According to the air bag unit 50 of the second embodiment described above, the same functions and effects as those of the vehicle seat 1 (specifically, the air bag unit 5) of the first embodiment can be obtained.

[0054] The technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0055] Furthermore, without departing from the spirit of the present invention, the components in the above embodiments may be replaced with well-known components as appropriate, and the above-described modifications may be combined as appropriate. [Explanation of Symbols]

[0056] 1... Vehicle seats 5.50...Air bag unit 11…Cushioning material 12…Surface material 20,52…Multiple air bladders 20A, 52A... First air bag (large diameter air bag) 20B, 52B... Second air bladder (small diameter air bladder) 20Aa,20Ba...Tip 20Ab,20Bb…Proximal end 22...1st entrance / exit (entrance) 25…Second entrance / exit (entrance)

Claims

1. In a vehicle seat in which cushioning material is covered with a surface material, The cushioning material and the surface material are provided with a plurality of air pockets, The plurality of air bladders are arranged independently on the cushioning material side and the surface material side such that at least a portion of them overlap. A vehicle seat characterized by the following features.

2. The aforementioned plurality of air bags include large-diameter air bags and small-diameter air bags. The large-diameter air bag and the small-diameter air bag are arranged independently such that at least a portion of them overlap. The vehicle seat according to feature 1.

3. The small-diameter air bag is positioned on the surface material side. The vehicle seat according to feature 2.

4. The aforementioned plurality of air bags are formed in a tubular shape with a closed tip and have an air inlet / outlet at the base end. A vehicle seat according to any one of claims 1 to 3.

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