CN113428106B

CN113428106B - Frame type hollow air bag and air bag device

Info

Publication number: CN113428106B
Application number: CN202010143936.5A
Authority: CN
Inventors: 夏允权
Original assignee: Ningbo Junsheng Automobile Safety System Co ltd
Current assignee: Ningbo Junsheng Automobile Safety System Co ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2023-05-05
Anticipated expiration: 2040-03-04
Also published as: CN113428106A

Abstract

The invention discloses a frame type hollow air bag and an air bag device, and relates to the technical field of automobile safety. One embodiment of the frame type hollow airbag includes: an inner cloth piece and an outer cloth piece; the inner layer cloth pieces are connected end to form an inner layer cylindrical surface, the outer layer cloth pieces are connected end to form an outer layer cylindrical surface, the edges of the inner layer cloth pieces and the edges of the outer layer cloth pieces are sewed to form an air bag, and the air bag is of a frame type hollow structure after being inflated and expanded. The air bag has the advantages of simple structure and small volume, and can greatly reduce the usage amount of the air bag fabric and the gas generator gunpowder, thereby reducing the manufacturing cost of the air bag.

Description

Frame type hollow air bag and air bag device

Technical Field

The invention relates to the technical field of automobile safety, in particular to a frame type hollow safety airbag and an safety airbag device.

Background

The airbag in the prior art is generally of an air bag type structure, and has the following defects:

(1) The use amount of the airbag fabric is large;

(2) The volume of the inflated air bag is large, so that the usage amount of the gunpowder of the gas generator is large.

Disclosure of Invention

In view of the above, the embodiment of the invention provides a frame type hollow air bag and an air bag device, which have simple structure and small volume, can greatly reduce the usage amount of air bag fabrics and the usage amount of gas generator gunpowder, and reduce the manufacturing cost of the air bag.

To achieve the above object, according to one aspect of the embodiments of the present invention, there is provided a frame type hollow airbag comprising: an inner cloth piece and an outer cloth piece; the inner layer cloth pieces are connected end to form an inner layer cylindrical surface, the outer layer cloth pieces are connected end to form an outer layer cylindrical surface, the edges of the inner layer cloth pieces and the edges of the outer layer cloth pieces are sewed to form an air bag, and the air bag is of a frame type hollow structure after being inflated and expanded.

Optionally, a non-through region is disposed in the air bag, and a through region between two adjacent non-through regions in the circumferential direction of the air bag forms a beam of the air bag.

Optionally, the non-through region comprises a missing region; the inner cylindrical surface is provided with a first inner layer missing region, the outer cylindrical surface is provided with a first outer layer missing region corresponding to the first inner layer missing region, and the edge of the first inner layer missing region is sewed with the edge of the first outer layer missing region to form the missing region.

Optionally, the non-through region comprises a single layer of cloth sheet region; the inner layer cylindrical surface is provided with a second inner layer missing region, and the edge of the second inner layer missing region is sewn with the corresponding position of the outer layer cylindrical surface to form the single-layer cloth piece region; or the outer cylindrical surface is provided with a second outer missing area, and the edge of the second outer missing area is stitched with the corresponding position of the inner cylindrical surface to form the single-layer cloth area.

Optionally, the single panel region faces the occupant after inflation of the airbag.

Optionally, the length of the inner cloth piece at the end part of the beam is longer than that of the outer cloth piece.

Optionally, in one beam of the air bag, the outer layer cloth piece protrudes outwards to form a containing space for containing an inflation inlet of the gas generator.

Optionally, the airbag comprises a plurality of beams, and a drawstring is arranged between at least one pair of adjacent beams in the plurality of beams, and is used for adjusting the thickness of the airbag after the airbag is inflated and expanded.

Optionally, an exhaust hole is arranged on the air bag.

According to a second aspect of the embodiment of the present invention, there is provided an airbag device comprising an airbag housing, a gas generator for inflating the frame type hollow airbag, and the frame type hollow airbag according to the first aspect of the embodiment of the present invention, wherein the frame type hollow airbag is stored in the airbag housing after being folded.

One embodiment of the above invention has the following advantages or benefits: the air bag with the frame type hollow structure is formed by sewing the inner layer cloth piece and the outer layer cloth piece, the structure is simple, the volume is small, the use amount of the air bag fabric and the use amount of the gas generator gunpowder can be greatly reduced, and the manufacturing cost of the air bag is reduced.

Further effects of the above-described non-conventional alternatives are described below in connection with the embodiments.

Drawings

The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:

FIG. 1 is a schematic illustration of an inner sheet and an outer sheet in an embodiment of the present invention;

FIG. 2 is a schematic illustration of a framed hollow airbag in accordance with an embodiment of the invention;

FIG. 3 is another schematic view of a framed hollow airbag in accordance with an embodiment of the invention;

FIG. 4 is a schematic cross-sectional view of a framed hollow airbag in accordance with an embodiment of the invention;

FIG. 5 is a schematic view of a drawstring in an embodiment of the invention;

FIG. 6 is a schematic view of an undeployed state of an airbag device in an embodiment of the invention;

FIG. 7 is a schematic view showing a deployed state of an airbag device in an embodiment of the invention;

FIG. 8 is a schematic view showing an airbag being deployed in a scene in which an airbag device of an embodiment of the present invention is applied;

FIG. 9 is a schematic view of the airbag in a scenario in which the airbag device of the embodiment of the present invention is applied;

fig. 10 is a schematic view of an airbag covering the head of an occupant in a scene where the airbag device of the embodiment of the present invention is applied.

Detailed Description

Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which various details of the embodiments of the present invention are included to facilitate understanding, and are to be considered merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

According to one aspect of an embodiment of the present invention, a framed hollow airbag is provided. As shown in fig. 1 to 5, the frame type hollow airbag 100 includes: an inner cloth piece 10 and an outer cloth piece 20.

The inner cloth pieces 10 are connected end to form an inner cylindrical surface, the outer cloth pieces 20 are connected end to form an outer cylindrical surface, the edges of the inner cloth pieces 10 and the edges of the outer cloth pieces 20 are sewed to form an air bag, and the air bag is of a frame type hollow structure after being inflated and expanded. One suture or a plurality of sutures can be adopted in the sewing process.

Compared with the air bag type air bag in the prior art, the air bag with the frame type hollow structure is formed by sewing the inner layer cloth piece 10 and the outer layer cloth piece 20, has a simple structure and small volume, can greatly reduce the use amount of air bag fabrics and the use amount of gas generator gunpowder, and reduces the manufacturing cost of the air bag. In the inflation process of the air bag, the air flow moves along the circumferential direction of the air bag to orderly fill the air bag, so that the inflation speed is high, and the inflation efficiency is high. During a collision, the head of the occupant acts on the airbag to deform the frame-like hollow structure of the airbag, which absorbs and dampens the energy of the head movement of the occupant.

The airbag is provided with non-penetrating regions therein, and penetrating regions between two adjacent non-penetrating regions in the circumferential direction of the airbag form a cross member 30 of the airbag. The non-through region refers to a non-inflatable region. The non-through area is arranged, so that the volume of the air bag can be further reduced, the use amount of air bag fabrics and the use amount of gas generator gunpowder are further reduced, the manufacturing cost of the air bag is reduced, and the inflation efficiency is improved.

During a collision, the head of an occupant acts on the airbag to deform the frame-like hollow structure of the airbag, which can cause the frame to wrap the head of the occupant and limit the left-right movement of the head. Particularly for offset collisions (ODB (Offset Deformable Barrier, offset deformation disorder), small offset (Small Offset Barrier)), the airbag can wrap and capture the head of an occupant, limit the left-right movement of the head, and prevent the head from sliding off the sides of the airbag and striking the hardware structure.

In some alternative embodiments, the non-through regions include a missing region 40, as shown in fig. 2 and 3. As shown in fig. 1, the inner cylindrical surface has a first inner missing region 11, the outer cylindrical surface has a first outer missing region 21 corresponding to the first inner missing region 11, and the edge of the first inner missing region 11 and the edge of the first outer missing region 21 are stitched to form a missing region 40. The shape of the missing region 40 may be selectively set according to the actual situation, for example, a circle, a rectangle, or the like. The missing area is arranged, so that the use amount of the airbag fabric can be further reduced on the basis of reducing the volume of the airbag, and further the cost is reduced.

In other alternative embodiments, the non-through regions comprise single layer panel regions 50, as shown in fig. 2 and 3. The single-layer panel region means that only the region contains only the outer-layer panel. As shown in fig. 1, the inner cylindrical surface is provided with a second inner missing region 12, and a single-layer cloth sheet region 50 is formed after the edge of the second inner missing region 12 is stitched with the corresponding position of the outer cylindrical surface. It should be noted that the single cloth layer region 50 may be formed as follows: the outer cylindrical surface is provided with a second outer missing area, and the edge of the second outer missing area is stitched with the corresponding position of the inner cylindrical surface to form a single-layer cloth area. The single cloth layer area is arranged, so that the wrapping effect of the air bag on the head of an occupant can be improved on the basis of reducing the volume of the air bag, and the safety is further improved. Further, as shown in fig. 8-10, upon inflation of the airbag, the single panel region 50 faces the occupant, thereby better wrapping and capturing the occupant's head in the event of a collision, limiting head movement, and preventing the head from striking the hardware structure.

In an alternative embodiment, the length of the inner panel at the end of the beam 30 is greater than the length of the outer panel. The length refers to a dimension along the circumferential direction of the airbag. As shown in fig. 1, the bent portions of the inner cloth piece 10 and the outer cloth piece 20 correspond to both ends of the cross member 30. As can be seen from fig. 1, the length of the outer sheet 20 at the fold is greater than the length of the inner sheet 10. By making the length of the inner cloth piece at the end of the cross beam 30 longer than that of the outer cloth piece, natural bending can be formed at the cross beam 30 after the airbag is inflated (as shown in fig. 2-5, natural bending is formed at the cross beam 30) so as to cling to the inner contour of the vehicle, and the safety of the airbag is improved.

Although the air bag shown in the drawings includes three cross members 30, the cross members 30 may not be included in the practical application process, or 1, 2, or more than 3 cross members 30 may be included.

Optionally, in one of the cross members 30 of the airbag, the outer cloth piece 20 is protruded outwardly to form a receiving space for receiving the inflation port of the inflator. As shown in fig. 1, a portion 22 of the outer sheet 20 is outwardly convex to form a receiving space 60, see fig. 2 and 3. Through setting up the gas generator inflation inlet in the gasbag, improve the direction of expanding of being convenient for accurate control gasbag, and then improve the guard action of gasbag to the passenger.

Optionally, the airbag comprises a plurality of cross beams, and a pull belt is arranged between at least one pair of adjacent cross beams in the plurality of cross beams and used for adjusting the thickness of the airbag after the airbag is inflated. In an alternative embodiment shown in fig. 5, the balloon comprises three beams, wherein a drawstring 80 is provided between two adjacent beams for adjusting the thickness of the balloon after inflation of the balloon. In general, the longer the pull strap 80, the greater the thickness of the balloon after inflation.

In the embodiment of the invention, the air bag is arranged to be attached to and adapt to the specific shape of the surrounding environment of the vehicle body by optimizing the structures of the inner cloth piece and the outer cloth piece and the number and the positions of the pull belts. This can enhance the wrapping and protecting effect of the airbag on the occupant.

In an alternative embodiment shown in fig. 2 and 3, an air vent 90 is provided on the air bag. In the practical application process, one or more exhaust holes can be arranged on two sides or an inner cloth piece and an outer cloth piece of the air bag. The damping force of the exhaust hole can greatly absorb collision energy, convert the collision kinetic energy into the heat energy of the exhaust damping force, and dissipate the heat energy into the air.

According to a second aspect of an embodiment of the present invention, there is provided an airbag device.

As shown in fig. 6, the airbag device 200 includes an airbag housing 70, a gas generator for inflating the frame type hollow airbag 100, and the frame type hollow airbag 100 provided in the first aspect of the present invention, the frame type hollow airbag 100 is stored in the airbag housing 70 after being folded. Fig. 7 shows a schematic view of the frame type hollow airbag 100 after deployment.

The air bag housing 70 may be configured to conform to and conform to a particular shape of the surrounding environment of the vehicle body, such as a spatially curved air bag housing, which may provide space savings and a more compact mounting of the air bag housing to the vehicle body.

The airbag device of the embodiment of the invention can be arranged on the side of a secondary driver PA (controller), and local plastic tearing lines of the airbag are designed at an IP (instrument panel) unfolding position, so that the internal appearance of an automobile and the work of other parts are not influenced. After the air bag is exploded, the plastic tearing line is torn, so that the air bag can be ejected from the IP deployment. The air bag device of the embodiment of the invention can be popularized and applied to front collision (FRB) and offset collision (ODB, small offset) of all passenger vehicles such as any saloon car, SUV, MPV and the like and part of small commercial vehicles in mass production.

The air bag with the frame type hollow structure is formed by sewing the inner layer cloth piece and the outer layer cloth piece, has a simple structure and a small volume, can greatly reduce the use amount of air bag fabrics and the use amount of gas generator gunpowder, and reduces the manufacturing cost of the air bag.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives can occur depending upon design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A framed hollow airbag comprising: an inner cloth piece and an outer cloth piece; the inner layer cloth pieces are connected end to form an inner layer cylindrical surface, the outer layer cloth pieces are connected end to form an outer layer cylindrical surface, the edges of the inner layer cloth pieces and the edges of the outer layer cloth pieces are sewed to form an air bag, and the air bag is provided with a frame type hollow structure after being inflated and expanded;

the air bag comprises three cross beams and three non-through areas; wherein, a cross beam of the air bag is formed along a through region between two adjacent non-through regions in the circumferential direction of the air bag, and a region between two adjacent cross beams forms the non-through region; after the airbag is inflated, the three cross beams and the three non-through areas form the frame type hollow structure, and the non-through area facing the passenger is a single-layer cloth area.

2. The framed hollow airbag of claim 1 wherein said non-pass-through region comprises a missing region; the inner cylindrical surface is provided with a first inner layer missing region, the outer cylindrical surface is provided with a first outer layer missing region corresponding to the first inner layer missing region, and the edge of the first inner layer missing region is sewed with the edge of the first outer layer missing region to form the missing region.

3. The frame type hollow airbag according to claim 1, wherein the inner cylindrical surface is provided with a second inner layer missing region, and the edge of the second inner layer missing region is sewn with the corresponding position of the outer cylindrical surface to form the single-layer cloth piece region; or the outer cylindrical surface is provided with a second outer missing area, and the edge of the second outer missing area is stitched with the corresponding position of the inner cylindrical surface to form the single-layer cloth area.

4. The framed hollow airbag of claim 1 wherein the length of the inner panel at the end of the beam is greater than the length of the outer panel.

5. The framed hollow airbag of claim 1 wherein the outer panel is outwardly convex in one of the beams of the airbag to form a receiving space for receiving an inflator opening of a inflator.

6. The framed hollow airbag of claim 1 wherein a drawstring is disposed between at least one pair of adjacent ones of the three beams, the drawstring being used to adjust the thickness of the inflated airbag.

7. A framed hollow airbag according to any of claims 1 to 6 wherein said airbag is provided with a vent.

8. An airbag apparatus comprising an airbag housing, a gas generator for inflating a framed hollow airbag as claimed in any of claims 1-7, wherein the framed hollow airbag is folded for storage with the airbag housing.