JP2005306251A - Inflater bag and vehicular seat cushion device using this inflator bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat cushion normally superior in comfortableness to sit on, and sufficiently securing safety by surely restraining a waist part of an occupant in an emergency such as a vehicle collision. <P>SOLUTION: In the disclosed vehicular seat cushion, an inflator bag 2 is composed of a substantially flat bag lower bracket 8, and a bag upper plate 10 for integrally forming tucking-in parts 9a and 9b in the longitudinal direction, and is arranged in a vehicular seat cushion device 1. A retainer 11 is installed in the tucking-in part 9a of a front part. A seat cushion spring 13 is tensioned between its retainer 11 and a horizontal sash bar 5 of a rear end part of the vehicular seat cushion device 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an inflator bag provided in a cushion main body and a vehicle seat cushion for restraining a seated occupant by inflating and deploying the inflator bag provided in a cushion body and restraining a waist.

In general, an occupant seated in a vehicle seat cushion wears a seat belt for safety during traveling of the vehicle, but in an emergency such as a vehicle collision, a large inertial force due to an impact is applied to the occupant and starts to slide out (forward) there's a possibility that.
In view of this, an air bag and restraining means are provided around the seat cushion of the vehicle or the seat cushion itself, and in the event of a collision, the waist and the restraining means are actuated to restrain the waist, thereby ensuring passenger safety. Has been proposed (Patent Documents 1 to 3).
JP-A-8-40177 JP-A-9-123857 Japanese Patent Application No. 2003-029139

In addition, in this type of vehicle seat cushion, high-pressure gas is sent from the inflator to the inflator bag provided in the cushion body in the event of a vehicle collision, and the inflator bag is inflated and deployed by the gas pressure. It has been considered that the inflator bag that is deployed restrains the occupant's lower back and is safe.
The inflator bag is attached to the front part of the cushion body to make the waist restraint effective, and a relatively large one is attached to the inflator bag, and the attached inflator bag strongly restrains the occupant's waist. In addition, safety is ensured by preventing slipping out of the seat.

When a large inflator bag is provided in the front portion of the cushion body, only a small cushion spring can be attached because of space. On the other hand, if you try to install a large cushion spring, there is an inflator bag in the front, so it can only be attached to the back of the cushion body, and it is difficult to obtain an elastic soft cushion that is comfortable to sit on was there.
Therefore, if a large inflator bag for restraining the waist is provided on the vehicle seat cushion, only a small cushion spring can be attached. Accordingly, an object of the present invention is to provide a vehicular seat cushion that is normally comfortable to sit on and that sufficiently secures the occupant's lower back in the event of an emergency such as a vehicle collision.

  In order to solve the above-mentioned problems, an invention according to claim 1 relates to an inflator bag, and is an inflator bag used for a waist restraint device for a vehicle seat, including a bag lower bracket, a bag upper cover, and a bag upper cover lifting device. An inflator bag, wherein the bag upper cover includes a front fold portion and a rear fold portion at a portion corresponding to the front and rear direction of the vehicle seat cushion device, and the front fold portion when the inflator bag is not deployed. And a retainer that holds the front end of the seat cushion spring can be held by the front folding portion.

  A second aspect of the present invention relates to the inflator bag according to the first aspect, wherein the upper cover lifting device is made of a woven fabric and has a bag-like shape.

A third aspect of the present invention relates to a vehicle seat cushion device comprising the inflator bag according to the first or second aspect and a seat cushion spring, wherein the inflator bag is the seat cushion spring of the vehicle seat cushion device. When the inflator bag is not deployed, one end is held by the front folding part, and the other end has a retainer that holds the front end of the seat cushion spring.
Here, the “front” direction indicates the normal traveling direction of the vehicle (direction called the front), and the “rear” direction indicates the opposite direction.

  According to the present invention, since the folded portion is formed in the front and rear direction of the vehicle seat cushion device in the bag upper cover of the inflator bag, the vibration applied from the road surface is normally absorbed by the spring action of the folded portion. Comfort is maintained.

  Further, according to the present invention, the inflator bag is a double bag in which an internal bag made of a bag-like woven material is built in an external bag having a bag lower bracket and a bag upper cover as a bag upper cover lifting device. Therefore, it becomes a device with higher reliability and sufficiently restrains the occupant's lower back in an emergency, and reliably prevents forward sliding (advance).

  Further, according to the present invention, the retainer main part has an S-shaped cross-sectional shape that conforms to the shape of the folded part, and therefore the retainer is attached to the folded part by simple operation (simply plugged in). be able to.

  Here, it is preferable that the retainer is made of plastic or synthetic resin because predetermined elasticity can be easily obtained from the properties of the material itself and it can be manufactured at a relatively low cost.

This invention is usually comfortable to sit on, and in the event of an emergency such as a vehicle collision, the folds of the inflator bag are integrally molded in the front and rear directions so that the occupant's waist is securely restrained to ensure sufficient safety. To do.
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

  FIG. 1 is a perspective view of a vehicle seat cushion device 1 according to an embodiment of the present invention, and FIG. 2A is an enlarged cross-sectional view taken along line AA before the inflator bag of the vehicle seat cushion device 1 is deployed. B) is an AA enlarged sectional view after the inflator bag of the vehicle seat cushion device 1 is deployed, and FIG. 3 is a front portion of the vehicle seat cushion device 1, and a retainer 12 and a seat cushion spring 13 are attached thereto. 3 is an enlarged perspective view of a front end portion of the inflator bag 2. FIG.

  In the vehicle seat cushion device 1 of this embodiment, a seat is attached to the upper portion and a passenger can be seated. The vehicular seat cushion device 1 is provided with an inflator bag 2 provided in a front portion thereof, frame portions 4a and 4b on the left and right sides, and a horizontal rail 5 at a rear end portion thereof.

  The inflator bag 2 plays a role of restraining the occupant's lower back in an emergency such as a vehicle collision, and is provided in a front portion of the vehicle seat cushion device 1 and below a seat cushion spring 13 described later. It is attached. The inflator bag 2 includes an outer bag 6 having an opening in the direction of the frame portions 4a and 4b and an upper cover lifting device built in the outer bag 6. In this example, the inner bag 7 is used as the upper cover lifting device. However, the inner bag 7 is not particularly limited to this, and any configuration may be used as long as the upper cover can be lifted. The outer bag 6 is a metal (metal) bag composed of a substantially flat bag lower bracket 8 and a bag upper cover 10 in which folded portions 9a and 9b are integrally formed in the front and rear directions. The front and rear folded portions 9a and 9b have a substantially U-shaped cross section folded inside the bag, and are provided integrally with the bag upper cover 10. Since the upper cover 10 is made of metal, the folded portions 9a and 9b have a slight spring action, and can be expected to absorb vibrations. Moreover, in this folding part 9a, 9b, it becomes a shape which can hold | maintain a retainer as mentioned later. The inner bag 7 is a relatively soft bag made of a woven fabric having a shape similar to that of the outer bag 6 after deployment, and is built in the outer bag 6. The inflator bag 2 is tough and reliable due to the outer bag 6 and the inner bag 7. The external bag 6 is fixed with bolts / nuts M or the like. Further, a gas supply unit 14 that houses an inflator for supplying an inflator gas to the internal bag 7 in an emergency is provided at the center of the lower surface of the inflator bag 2.

A retainer 11 is attached to the folding portion 9a at the front portion of the outer bag 6, and the retainer 11 (one end thereof) is held while the inflator bag 2 is secured with a certain cushioning property (spring property). The other end of the front end locks a front end portion of a seat cushion spring 13 described later. The retainer 11 is a holder whose cross section made of plastic (for example, hard rubber or synthetic resin) has a substantially S-shaped main portion along the shape of the front folding portion of the inflator bag 2. A plurality of U-shaped flanges 12 are provided at a predetermined interval at the tip.
A substantially rectangular wave-like shape for holding the inflator bag 2 is formed between the U-shaped collar portion 12 provided on the retainer 11 and the horizontal rail 5 provided at the rear end portion of the vehicle seat cushion device 1. A seat cushion spring 13 is stretched.
The vehicle seat cushion is configured such that an upper seat or the like is stretched on the vehicle seat cushion device 1 and a backrest or the like is attached so that a passenger can be seated.

  When the vehicle seat cushion is not normally deployed, the vehicle seat cushion is disposed between the retainer 11 attached to the folding portion 9a of the front portion of the inflator bag 2 and the crosspiece 5 as shown in FIG. Since the stretched seat cushion spring 13 is held, the vibration applied from the road surface is absorbed by the spring action of the folding portions 9a and 9b of the inflator bag 2 and the spring action of the seat cushion spring 13 within a limited range. Good sitting comfort is ensured.

  In an emergency such as a vehicle collision, as shown in FIG. 2 (B), high pressure gas is sent from the inflator provided at the lower part of the inflator bag to the inner bag 7 of the double bag. The inflator bag 2 is inflated and deployed. When the inflator bag 2 is deployed, the retainer 11 attached to the folding part 9a in the front part is detached from the folding part 9a, and at the same time, the seat cushion spring 13 hung on the collar part 12 of the retainer 11 is detached from the collar part 12. As a result, the cushion spring that has made it difficult to expand the inflator bag upward is also removed. And the passenger | crew's waist | hip | lumbar part is restrained strongly by this inflator bag 2 expanded widely. As a result, the occupant is prevented from slipping forward (advancing), and safety is ensured.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change or the like without departing from the gist of the present invention. include.
For example, in the above-described embodiment, the inflator bag is composed of a double bag composed of a bag lower bracket and a bag upper cover, but an inflator bag may be integrally formed with a single plate. .

  Further, in the embodiment, a folded portion that is folded in a substantially U-shaped cross section is provided in the front / rear direction of the inflator bag, but the folded portion does not need to have a substantially U-shaped cross section, Many folded bellows shapes can be obtained. In short, the inflator bag usually has a predetermined cushioning property, and in an emergency, the inflator bag may have a multi-stage bellows shape that can sufficiently restrain the passenger's waist by the inflator bag that is deployed with the retainer and the cushion spring removed. The shape is not particularly limited. In addition, the cross-sectional shape of the retainer attached to the folded portion according to the shape of the folded portion in the front / rear direction is not limited to a substantially S-shape, and retainers having various shapes according to the shape of the folded portion at the front portion. Is used.

  The vehicle seat cushion of the present invention is used for a vehicle seat cushion such as an automobile or a train, but can also be used for a vehicle seat cushion such as an aircraft or a ship other than the vehicle, and the same effect is exhibited. .

1 is a perspective view of a vehicle seat cushion device according to an embodiment of the present invention. (A) is an AA enlarged sectional view before deployment of the inflator bag of the vehicle seat cushion device. (B) is an AA enlarged cross-sectional view after deployment of the inflator bag of the vehicle seat cushion device. FIG. 2 is an enlarged perspective view of a front end portion of an inflator bag to which a retainer and a seat cushion spring of the vehicle seat cushion device are attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat cushion apparatus 2 Inflator bag 5 Horizontal crosspiece 8 Bag lower bracket 9a, 9b Folding part 10 Bag upper cover 11 Retainer 13 Seat cushion spring

Claims (3)

An inflator bag used for a vehicle seat waist restraint device,
An inflator bag including a bag lower bracket, a bag upper cover, and a bag upper cover lifting device,
The bag upper cover includes a front fold portion and a rear fold portion in a front-rear direction of the vehicle seat cushion device,
An inflator bag characterized in that when the inflator bag is not deployed, a retainer that holds the front end of the seat cushion spring in a shape that follows the front fold portion can be held by the front fold portion. .   The inflator bag according to claim 1, wherein the upper cover lifting device is made of woven fabric and has a bag shape. A vehicle seat cushion device comprising the inflator bag according to claim 1 or 2 and a seat cushion spring,
The inflator bag is attached to a lower side of the seat cushion spring of the vehicle seat cushion device;
A vehicle seat cushion device comprising: a retainer that holds one end of the front cushion portion and the other end of the seat cushion spring when the inflator bag is not deployed.

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