JP2002079863A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat easy in installing work of an air bag device at manufacturing time and capable of reducing manufacturing manhours and a cost. SOLUTION: This vehicle seat prevents a forward slip of a seated occupant at required time, and is provided with an air bag 18 arranged on the upper surface side of a seat cushion 5 of a seat part 3 and an inflator 30 arranged under the seat cushion 5. The air bag 18 and the inflator 30 are communicated, and a gas passage 28 capable of supplying inflating gas delivered from the inflator 30 to the air bag 18 is arranged on the outer peripheral edge of the seat cushion 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat for preventing a occupant from slipping forward when required.

Here, the front slip is a phenomenon in which a lower body of an occupant moves forward when an impact or the like acts on a vehicle, and is usually called a submarine phenomenon.

[0003]

2. Description of the Related Art Conventionally, as a vehicle seat for preventing front slip of a seated occupant when required, there has been one disclosed in Japanese Utility Model Laid-Open Publication No. Sho 61-158543.

This vehicle seat has a configuration in which an airbag device is stored in a seat portion of the seat. The seat portion includes a seat cushion, and a support plate disposed below the seat cushion and supporting the seat cushion.The airbag device includes an airbag disposed on the upper surface side of the seat cushion, and a seat. An inflator arranged between the cushion and the support plate to supply an inflation gas to the airbag, a gas flow path arranged to penetrate the seat cushion by communicating the airbag and the inflator, It was configured with.

[0005] In this conventional vehicle seat, the gas flow path in the airbag device is arranged so as to penetrate the seat cushion. Therefore, during the operation of assembling the airbag device, it is arranged on the upper surface side of the seat cushion. In order to connect the airbag and the inflator disposed below the seat cushion, it is necessary to pass a gas flow path from one side to a through hole formed in the seat cushion. However, since the seat cushion is formed from a soft foam such as urethane foam, it is not easy to pass the gas cushion through the through hole of the gas flow path. For this reason, the work of assembling the airbag device to the seat is complicated, and the number of man-hours for assembling the airbag device is increased. As a result, the man-hour and cost for manufacturing the vehicle seat are increased.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a vehicle seat in which an assembling operation of an airbag device at the time of manufacturing is easy, and the number of manufacturing steps and costs can be reduced.

[0007]

A vehicle seat according to the present invention prevents a seated occupant from slipping forward when required.
A vehicle seat including an airbag disposed on a seat cushion upper surface side of a seat portion and an inflator disposed below the seat cushion, wherein the airbag communicates with the inflator and is discharged from the inflator. A gas passage capable of supplying an inflation gas to the airbag is arranged on an outer peripheral edge of the seat cushion.

It is desirable that the airbag and the gas flow path are formed integrally.

Further, it is desirable that the gas flow path be arranged vertically in the vicinity of the center in the vehicle left-right direction on the front side of the seat cushion.

[0010] Furthermore, a left and right raised portion is provided on both sides of the vehicle so as to extend in the front-rear direction, and a front seat is disposed on the vehicle front side between the left and right raised portions. And a rear seating surface portion disposed on the rear side of the vehicle between the left and right ridges, and the airbag is disposed so as to cover at least substantially the entire upper surface side of the front seating surface portion. It is desirable that the configuration be such that:

Furthermore, it is desirable that the airbag is arranged so as to cover substantially the entire area on the upper surface side of the seat cushion.

[0012] Further, the seat cushion includes a cushion body and a skin covering an upper surface of the cushion body, and the airbag is arranged between the cushion body and the skin. Is desirable.

[0013] Furthermore, it is desirable that the airbag is formed by a weave.

Further, the airbag may be formed by welding a sheet material at a predetermined position.

[0015]

In the vehicle seat according to the present invention,
The gas flow path connecting the airbag and the inflator is
It is a configuration that is arranged on the outer peripheral edge of the seat cushion, and it is possible to arrange the gas flow path outside the seat cushion without disposing the gas flow path through a through hole formed in the seat cushion as in the related art. Thereby, the airbag and the inflator can be connected from the outside. Therefore, the workability of assembling the airbag and the inflator at the time of manufacturing the vehicle seat is improved, and as a result, the number of manufacturing steps and cost of the vehicle seat can be reduced.

In addition, since it is not necessary to provide a through hole for penetrating the gas flow path, which has been conventionally required, in the seat cushion, the seat cushion can be arranged over the entire area of the seat, and the cushioning property of the seat can be improved. Is also good.

Furthermore, if the air bag and the gas flow path are integrally formed, there is no need to provide a separate gas flow path, and it is sufficient to simply connect the gas flow path to the inflator. The number of manufacturing steps and cost of the bag can be reduced. As a result, the number of manufacturing steps and cost of the vehicle seat can be further reduced.

Further, if the gas flow path is arranged vertically in the vicinity of the center in the vehicle left-right direction on the front side of the seat cushion, the gas flow path is disposed between the feet of the occupant seated on the gas flow path. Therefore, even if the gas flow path is inflated with the inflation of the airbag, the inflated gas flow path is unlikely to come into contact with the occupant, and it is unlikely to cause a sense of incongruity. Further, with such a configuration, the inflation gas flows into the airbag from the front side to the rear side of the seat when required. As a result, the airbag inflates from the front side to the rear side of the seat, restraining the front of the occupant's buttocks, that is, the back of the seated occupant's thighs, and Can be directly restricted from moving forward.

Still further, a left and right raised portion is provided on both sides of the vehicle so as to extend in the front-rear direction, and a front seat disposed on a vehicle front side between the left and right raised portions. And a rear seating surface portion disposed on the rear side of the vehicle between the left and right ridges, and the airbag is disposed so as to cover at least substantially the entire upper surface side of the front seating surface portion. With such a configuration, when the occupant is seated, a sense of incongruity due to the presence or absence of the airbag is unlikely to occur, and the seating feeling is good.

Further, if the airbag is arranged so as to cover substantially the entire area on the upper surface side of the seat cushion, a step is less likely to occur than when the airbag is partially arranged. The seating feeling when the occupant sits is further improved, and the design of the seat is also improved.

Still further, the seat cushion may include a cushion main body and a skin covering an upper surface of the cushion main body, and the airbag may be arranged between the cushion main body and the skin. Since the airbag is covered with the skin, the design of the sheet is further improved.

Furthermore, if the airbag is formed of a bag weave, the thickness of the airbag can be made uniform, so that the seating feeling when the occupant is seated is good.

Further, even when the airbag is formed by welding a sheet-like material at a predetermined location, the seating feeling when an occupant sits down can be made uniform in thickness of the airbag. At the same time, the airbag can be manufactured at a lower cost than in the case where the airbag is formed by bag weaving, so that the manufacturing cost of the vehicle seat can be reduced.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

A vehicle seat (hereinafter, abbreviated as “seat”) 1 according to an embodiment of the present invention is shown in FIGS. In the present embodiment, a front seat will be described as an example of the seat 1.

The seat 1 includes a backrest 2 and a seat 3. The seat 3 includes a seat cushion 5 and a support plate 13 (which is disposed below the seat cushion 5 and supports the seat cushion 5). Seat frame),
It has. The support plate 13 is disposed substantially along the horizontal direction. A plurality of mounting holes 13 a are formed near the front end of the support plate 13. Each mounting hole 13a is provided with a mounting bracket 3 for mounting an inflator 30 to be described later to the support plate 13.
4 is inserted through the mounting bolt 35. Further, below the support plate 13, a seat track 14 capable of adjusting the position of the seat 1 in the front-rear direction is provided. The seat cushion 5 includes a cushion body 6 formed of polyurethane or the like, and a skin 12 arranged so as to cover the surface including the upper surface side of the cushion body 6. The outer skin 12 is formed from fabric, leather, or the like. The seat 3 has an airbag device 16.
Is assembled.

The cushion body 6 is disposed on the vehicle front side between the left and right protruding portions 7.8, which are disposed so as to extend in the front-rear direction on both sides in the vehicle left-right direction. And a rear seat portion 10 disposed on the rear side of the vehicle between the left and right ridges 7 and 8.

The epidermis 12 has left and right raised portions 7.8.
Skins 12a and 1 for the left and right ridges respectively covering the upper surface side of
2b, a front seat surface skin 12c that covers the upper surface of the front seat surface portion 9, and a rear seat surface skin 12d that covers the upper surface of the rear seat surface portion 10. It is arranged so as to cover the upper surface side of the cushion main body 6 by sewing around the portion.

The airbag device 16 includes the cushion body 6.
Covers the upper surface of the front seating surface portion 9 over substantially the entire area,
In addition, an airbag 18 is disposed between the front seat portion skin 12c and the cushion body 6 in a flatly deployed state.
The inflator 30 supplies an inflation gas to the airbag 18, and communicates the inflator 30 attached and fixed to the support plate 13 with the airbag 18 and the inflator 30 so that the inflation gas discharged from the inflator 30 is supplied to the airbag 18. 1
And a gas flow path 28 that can be supplied to the fuel cell 8. The gas passage 28 is formed integrally with the airbag 18, and is disposed between the skin 12 and the cushion body 6 along the outer peripheral edge 6 a of the cushion body 6 on the vehicle front side. I have. Further, the gas flow path 28 is disposed vertically in the vicinity of the center in the vehicle left-right direction. As shown in FIGS. 4 and 6, the vicinity of the end of the gas flow path 28 is connected to a diffuser 33 described later of the inflator 30 using a clamp 37.

The airbag 18 is formed by bag weaving using polyester yarn, polyamide yarn or the like, and is communicated with a gas flow passage 28 as shown in FIGS. And an inflatable portion 18B that does not allow inflation gas to flow.
The inflation portion 18A is configured to be separated into the peripheral wall portion 25 and the peripheral wall portion 26 when the inflation gas flows. The non-expandable portion 18B includes a peripheral wall portion 25 and a peripheral wall portion 26 in the expandable portion 18A.
And a rear edge 21 serving as a rear edge of the vehicle, two side edges 22 and 23 extending forward from each end of the rear edge 21 in parallel with each other, and two side edges 22 and 23. 2
3 are connected to each other at the leading edge 24 facing the trailing edge 21.
And four edges. A tubular gas flow path 28 extends near the center of the front edge 17 in the vehicle left-right direction, and is formed integrally with the airbag 18 by a weave. The airbag 18 is formed so as to cover substantially the entire upper surface side of the front seating surface portion 9 of the cushion body 6, allows inflation gas to flow from the gas flow passage 28, and moves from the front side to the rear side of the seat 1. It is configured to expand toward the front. The airbag 18 is manufactured such that the number of threads to be driven in the non-inflated portion 18B is twice the number of driven threads of the inflated portion 18A. As shown in FIG. 6, the inflated portion 18A is equivalent to two non-inflated portions 18B. Is formed to have a thickness substantially the same as the thickness of.

As shown in FIG. 7, the inflator 30 is of a cylinder type and has a substantially cylindrical inflator main body 31 and is externally mounted on the inflator main body 31. A substantially cylindrical diffuser 33 connected so as to contact the
It is provided with. The inflator body 31 is connected to a gas discharge port 31a for discharging the inflation gas toward the front side of the vehicle, and a lead wire 32 for inputting a gas generation signal. The lead wire 32 is connected to a connector (not shown) that is electrically connected to the airbag operation circuit. In the diffuser 33, mounting brackets 34 for mounting and fixing the inflator 30 to the support plate 13 are provided at two locations along the axial direction. The mounting bracket 34 has a mounting bolt 35.
Are welded and arranged.

Then, each mounting bolt 35 provided on the mounting bracket 34 is inserted through a mounting hole 13 a formed in the support plate 13, and is fixed to a nut 39 on the lower surface side of the support plate 13, thereby forming the inflator 30.
Are fixed to the support plate 13 together with the airbag 18.

Next, the production of the sheet 1 of the embodiment will be described. First, the diffuser 33 is externally attached to the inflator body 31 to assemble the inflator 30, and the clamp 3 is attached to the gas flow path 28 in the airbag 18.
7 is exteriorized. Then, the vicinity of the end of the gas flow path 28 in the airbag 18 is externally covered with the diffuser 33, the clamp 37 is externally provided on the gas flow path 28 to reduce the diameter, and the gas flow path 28 is connected to the diffuser 33,
The airbag device 16 is assembled. Next, each mounting bolt 35 is inserted into the mounting hole 13 a of the support plate 13, and a nut 39 is fixed on the lower surface side of the support plate 13,
The airbag device 16 is mounted on the support plate 13.
Then, the cushion body 6 is placed on the support plate 13, and the airbag 18 is placed flat on the front side in a state where the airbag 18 is spread flat so as to cover substantially the entire upper surface of the front seating surface portion 9 of the cushion body 6. It is arranged above the seat surface 9. At this time, the gas flow passage 28 is disposed vertically along the outer peripheral edge 6a of the cushion body 6 on the vehicle front side and near the center of the seat 1 in the vehicle left-right direction. Next, the cushion body 6 and the airbag 18 are covered with the skin 12 to form the seat 3. The seat 1 of the embodiment is manufactured by attaching the backrest 2 to the seat 3 thus formed. Then, the completed seat 1 is mounted on a vehicle, and the terminals of the lead wires 32 are connected to a control circuit (not shown).

In the seat 1 of the embodiment, when a predetermined electric signal is input to the inflator 30 via the lead wire 32, the inflation gas G is supplied from the gas discharge port 31a of the inflator body 31 toward the front side of the vehicle. It is discharged and flows into the airbag 18 through the gas flow path 28. Then, the airbag 18 is inflated from the front side to the rear side of the vehicle so as to push up the front seat surface skin 12c upward.

That is, in the sheet 1 of the embodiment, FIG.
As shown in FIG.
The airbag 18 arranged to cover the upper surface of the cushion body 6 is inflated and seated by the inflation gas flowing from the gas flow passage 28 arranged along the outer peripheral edge 6a of the cushion main body 6 on the vehicle front side end. The buttock H of the occupant P is restrained, and the occupant P can be restrained from moving forward.

In the seat 1 of the embodiment, the gas passage 28 is arranged on the outer peripheral edge 6a of the cushion body 6 on the vehicle front side. Therefore, by disposing the gas flow path 28 outside the cushion main body 6 without arranging the gas flow path 28 through the through hole formed in the cushion main body 6 as in the related art, the airbag 18 and the inflator 30 can be connected from the outside. Therefore, the workability of assembling the airbag device 16 at the time of manufacturing the vehicle seat is improved, and as a result, the number of manufacturing steps and cost of the seat 1 can be reduced. In addition, since it is not necessary to provide a through hole for penetrating the gas flow path 28, which has been conventionally required, in the cushion body 6, the cushion body 6 can be arranged over the entire area of the seat 3, and Cushioning properties are also good.

In the embodiment, since the airbag 18 and the gas passage 28 are formed integrally, the gas passage 2
It is not necessary to separately provide the gas flow path 8, and it is sufficient to simply connect the gas flow path 28 to the inflator 30, so that the number of manufacturing steps and cost of the airbag device 16 can be reduced. However, if this point is not considered, the airbag 1
8 and the gas passage 28 may be formed separately.

In the embodiment, the gas passage 28 is arranged vertically in the vicinity of the center in the vehicle left-right direction on the front side of the cushion body 6. Therefore, the gas flow path 28 is disposed between the feet of the seated occupant, and even if the gas flow path 28 is inflated with the inflation of the airbag 18, the expanded gas flow path 28 contacts the occupant. It is difficult to give a feeling of strangeness. Furthermore, in the above configuration, the inflation gas flows into the airbag 18 from the front side to the rear side of the seat 1 when necessary. as a result,
The airbag 18 is inflated from the front side to the rear side of the seat 1 and restrains the front surface of the buttock H of the occupant P, that is, the back surface of the thigh T of the seated occupant P, The forward movement of the buttock H of the occupant P can be directly restricted. If the above effects are not considered, the gas flow path 2
8 may be arranged at any location as long as it is the outer peripheral edge of the cushion body 6.

As shown in FIGS. 9 and 10, the airbag 18 may be arranged so as to cover substantially the entire upper surface side of the front seat surface 9 and the rear seat surface 10 of the cushion body 6. Further, as shown by a two-dot chain line in FIG. 10, the airbag 18 may be arranged so as to cover substantially the entire upper surface side of the cushion body 6 including the left ridge 7 and the right ridge 8. . With such a configuration, a step is less likely to occur than in the case where the airbag 18 is partially disposed, and the seating feeling when the occupant P sits is further improved, and at the same time, the design of the seat 1 is improved. Is also good. Conversely, the airbag 18 is connected to the front seat surface 9.
The configuration in which only the upper surface side of the front part of the vehicle is disposed is also pushed up by the knee of the occupant P on which the inflated airbag 18 is seated, so that the back surface of the thigh T of the occupant P is restrained, Since the front slip of the occupant P can be prevented, such a configuration may be adopted unless the occupant's seating feeling and the design of the seat are taken into consideration.

Further, as shown in FIGS. 11 and 12, the outer skin 12 may be partially arranged, and the outer skin 12 may not be arranged at the position where the airbag 18 is arranged. That is, in the illustrated example, the front side seat surface portion skin 12c is not arranged, and the airbag 18 made of woven fabric is exposed. However, since the design of the seat 1 is improved by covering the airbag 18 with the skin 12,
It is desirable to adopt a configuration in which the entire surface of the seat portion 3 is covered with a cover. Of course,
The airbag 18 made of a woven bag may cover substantially the entire upper surface of the seat portion 3. In this case, the inflatable portion 18A is arranged on the upper surface side of the front seat surface portion 9 or the upper surface side of the front / rear seat surface portions 9 and 10 so that the non-inflatable portion 18B is replaced with the inflatable portion 18A.
May be arranged from the periphery to the upper surface side of the left and right raised portions 7 and 8.

Further, as shown in FIG. 13, an airbag device 16 may be arranged below the support plate 13 (seat frame). With such a configuration, only the cushion main body 6 is disposed on the support plate 13, so that the occupant's seating feeling is further improved.

In the embodiment, the front seat is used as the seat 1 as an example. However, the present invention is not limited to the seat 1 shown in FIG. The present invention is also applicable to a bench seat 41 for a person). As shown in FIG. 15, the airbag 43 used for such a bench seat 41 is arranged so as to cover substantially the entire upper surface side of the front seating surface portion 42 in the seat portion. And an inflatable portion 43A that is in communication with the inflating gas and inflates by inflow of the inflating gas, and a non-inflatable portion 43B that does not allow the inflating gas to flow. Has the same configuration as the airbag 18 of FIG. In addition, the airbag 43 partially divides the inflatable portion 43A when inflated, and partially restricts the airbag 43 so that a portion near the center in the left-right direction of the vehicle is first inflated and then a portion near both left and right ends is inflated. The configuration includes a portion 46. In addition, the regulation part 46 is a non-expandable part 43.
Similar to B, the peripheral wall portion 44 and the peripheral wall portion 45 in the expansion portion 43A are configured to be connected.

In the present invention, the airbag 18 is formed by weaving, but the manufacturing method of the airbag 18 is not limited to this. As shown in FIG. 16, a woven fabric, a sheet, a film, or the like made of polyester, polyamide, or the like is welded to each other in the vicinity of the end portions of the peripheral wall portions 49 and 50 and at predetermined locations. Is also good. If the airbag is formed by weaving or welding, the thickness of the airbags 18 and 48 can be made uniform, and the seating sensation when the occupant is seated is improved. If this point is not considered, the airbag may be formed by suturing.

In the present invention, the inflator 30 of the airbag device 11 is connected to a support plate (seat frame).
13, but is not limited thereto, and may be configured so that the inflator 30 of the airbag device 11 is attached and fixed to a floor panel.

Further, in the present invention, the cushion body 6 of the seat portion 3 is formed of a single body of a foam such as polyurethane, but a seat body or the like is incorporated in the foam as the cushion body. A configuration may be used. As the seat frame, in addition to the plate-shaped support plate 13 made of sheet metal, a sheet frame or a resin plate may be used.

[Brief description of the drawings]

FIG. 1 is a side view of a seat according to an embodiment of the present invention.

FIG. 2 is a plan view of the sheet of FIG.

FIG. 3 is a cross-sectional view of a seat portion taken along a line III-III in FIG. 2;

4 is a partially enlarged view showing the vicinity of the airbag device in FIG.

FIG. 5 is a plan view of an airbag used for the seat of FIG. 1;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a sectional view of an inflator used for the sheet of FIG. 1;

FIG. 8 is a cross-sectional view showing a state in which an airbag is inflated in the seat of FIG.

FIG. 9 is a plan view of a seat according to another embodiment of the present invention.

FIG. 10 is an enlarged cross-sectional view of a seat at a portion XX in FIG. 9;

FIG. 11 is a plan view of a seat according to still another embodiment of the present invention.

FIG. 12 is an enlarged cross-sectional view of a seat portion taken along a line XII-XII in FIG. 11;

FIG. 13 is a cross-sectional view of a seat in a seat according to still another embodiment of the present invention.

FIG. 14 is a plan view of a seat according to still another embodiment of the present invention.

FIG. 15 is a plan view of an airbag used for the seat of FIG.

FIG. 16 is a cross-sectional view showing another embodiment of an airbag usable in the present invention.

[Explanation of symbols]

 1.41 Seat 3 Seat 5 Seat cushion 6 Cushion body 9 Front seating surface 12 Skin 13 Support plate 16 Airbag device 18.43.48 Airbag 28 Gas flow path 30 Inflator 31 Inflator body 33 Diffuser

Claims (8)

[Claims] 1. A vehicle for a vehicle comprising: an airbag disposed on a seat cushion upper surface side of a seat portion to prevent a seated occupant from sliding forward when required; and an inflator disposed below the seat cushion. A gas passage which communicates the airbag with the inflator and is capable of supplying an inflation gas discharged from the inflator to the airbag is arranged on an outer peripheral edge of the seat cushion. A vehicle seat characterized in that: 2. The vehicle seat according to claim 1, wherein the airbag and the gas flow path are formed integrally. 3. The vehicle seat according to claim 1, wherein the gas flow path is provided in a vertical direction near a center of the front surface of the seat cushion in a vehicle left-right direction. 4. A left and right raised portion extending in the front-rear direction on both sides of the vehicle in the left-right direction, and a front side disposed on the vehicle front side between the left and right raised portions. A seat surface portion, and a rear seat surface portion disposed on the rear side of the vehicle between the left and right ridge portions, wherein the airbag covers at least substantially the entire upper surface side of the front seat surface portion. The vehicle seat according to any one of claims 1 to 3, wherein the vehicle seat is arranged as follows. 5. The vehicle seat according to claim 1, wherein the airbag is disposed so as to cover substantially the entire upper surface side of the seat cushion. 6. The seat cushion includes a cushion main body and a skin covering an upper surface side of the cushion main body, and the airbag is disposed between the cushion main body and the skin. The vehicle seat according to claim 4 or 5, wherein: 7. The vehicle seat according to claim 1, wherein the airbag is formed by a weave. 8. The vehicle seat according to claim 1, wherein the airbag is formed by welding a sheet material at a predetermined location.