CN218505810U

CN218505810U - Safety air bag

Info

Publication number: CN218505810U
Application number: CN202222888150.3U
Authority: CN
Inventors: 陈吴健; 张登阳; 徐丹
Original assignee: Autoliv Development AB
Current assignee: Autoliv Development AB
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-02-21
Anticipated expiration: 2032-10-31

Abstract

The utility model provides an air bag. The airbag includes: an air bag having a deployed state and a stowed state, and an outer pull strap located at least partially outside the air bag and configured to limit deployment of the air bag, wherein the outer pull strap includes a first end, a second end, and a protrusion located between the first end and the second end, the first end and the protrusion both being located inside the air bag when the air bag is in the stowed state, the second end being located outside the air bag, the air bag including a slot for the outer pull strap to pass through, the protrusion passing through the slot to be located from inside the air bag to outside the air bag when the air bag transitions from the stowed state to the deployed state such that an increasing portion of the outer pull strap passes through the slot before being located outside the air bag.

Description

Safety air bag

Technical Field

The present invention relates to a safety device in a vehicle, and in particular, to an airbag in a vehicle.

Background

Existing automotive airbags include an airbag disposed in a steering wheel and an airbag disposed in an instrument panel for protecting a front passenger. Further, as another form of airbag, a curtain airbag is generally mounted above a side door at an edge of a vehicle structure below an inner roof panel, and is inflated when the vehicle is impacted, so that it is expanded and deployed in an inflated state along a vehicle side structure in the vehicle such as a side window, and thereby prevents an occupant from suffering serious injury by directly hitting an inner side structure of the vehicle or being thrown out of the window. In addition, a seat side airbag may be provided in the vehicle, which functions to provide protection also to the side of the occupant.

Meanwhile, the airbag is generally provided with a drawstring to restrict the deployment (e.g., a deployed shape or a deployed size) of the airbag during the deployment of the airbag. The draw tape comprises an outer draw tape and an inner draw tape, at least a portion of the outer draw tape is disposed outside the air bag, and the inner draw tape is disposed entirely inside the air bag. For the pull-out tape, it is desirable that, when the air bag is mounted to a predetermined position of the vehicle in a stored state, a portion of the pull-out tape located outside the air bag is as short as possible in order to facilitate quick completion of the mounting; and, when the air bag is inflated and deployed, the portion of the draw-out tape located outside the air bag is as long as possible to ensure that the air bag in the deployed state has a predetermined shape and/or size.

However, the outer tension band provided in the conventional airbag increases the number of manufacturing steps of the airbag and increases the cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an air bag with less manufacturing steps and lower cost.

The utility model provides an air bag, it includes:

an airbag having a deployed state and a stowed state, and,

an outer draw tape located at least partially outside the air bag and for limiting deployment of the air bag,

wherein the content of the first and second substances,

the draw-out tape comprises a first end, a second end and a protrusion therebetween, the first end and the protrusion both being positioned inside the air bag when the air bag is in the stowed condition, the second end being positioned outside the air bag,

the air bag includes a slot for the pull-out strap to pass through, the protrusion passing through the slot to be positioned from an inner side of the air bag to an outer side of the air bag when the air bag is transitioned from the stowed state to the deployed state such that more and more portions of the pull-out strap are positioned on the outer side of the air bag after passing through the slot.

According to an embodiment of the invention, the air pocket the edge of the groove is provided with a force area of weakness.

According to an embodiment of the present invention, the outer draw tape is composed of one piece of fabric, and includes a strip-shaped main body portion, two of the protruding portions are configured to protrude in the width direction from one side of the main body portion, respectively.

According to an embodiment of the present invention, the draw-out tape includes a first fabric configured as a strip-shaped main body portion and a second fabric configured to be connected to a side of the first fabric to form a protrusion portion protruding from a thickness direction of the main body portion.

According to an embodiment of the invention, the airbag further comprises a mounting located outside the air bag, the second end of the outer pull strap being fixed to a predetermined position of the vehicle via the mounting.

According to the utility model discloses an embodiment, the installed part is the metalwork to have annular link, the second end of outer stretching strap is walked around the installed part the hole of link and is fixed the link.

According to an embodiment of the invention, the force weakening area is configured as one or more tear lines.

According to an embodiment of the invention, the groove of the air bag is configured as a rectangular groove.

According to an embodiment of the invention, the main body portion and the protruding portion of the outer draw tape are formed from one piece of fabric via a cutting process.

According to an embodiment of the invention, the protrusion is configured to extend from the main body portion in a width direction thereof and then in a length direction thereof towards the second end.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, like numbering represents like elements between the drawings, and wherein:

fig. 1, 2 (a) and 2 (b) schematically show part of an airbag according to a first embodiment of the present invention.

Fig. 3 schematically shows part of an airbag according to a second embodiment of the invention.

Fig. 4 and 5 schematically show overall views of the first and second embodiments described above, respectively.

Detailed Description

Hereinafter, a specific embodiment of an airbag according to the present invention will be described with reference to the accompanying drawings. The following detailed description and drawings are included to illustrate the principles of the invention, and the invention is not limited to the preferred embodiments described, but rather, the various embodiments described may be used alone or in any combination, and the scope of the invention is defined by the claims.

In addition, spatially relative terms (such as "upper," "lower," "left," and "right," etc.) are used to describe one element's relative positional relationship with another element as illustrated in the figures. Spatially relative terms may therefore apply in other orientations than those illustrated in the figures, when used. It will be apparent that although for ease of illustration all of these spatially relative terms refer to the orientation shown in the drawings, those skilled in the art will appreciate that orientations other than those shown in the drawings may be used.

The safety air bag of the utility model is particularly suitable for being used as a side air bag and an air curtain of a seat.

Fig. 1, 2 (a) and 2 (b) schematically show part of an airbag according to a first embodiment of the present invention, and fig. 4 shows an overall view thereof. Hereinafter, an airbag according to a first embodiment of the present invention will be described with reference to fig. 1, 2 (a), 2 (b) and 4.

The airbag in the first embodiment of the present invention takes a seat side airbag as an example.

As shown in fig. 1 and 4, the airbag 10 of the present invention includes an airbag 100, an outer draw tape 200, and a gas generator (not shown). The airbag 100 has a deployed state and a stored state, and the gas generator generates gas to bring the airbag 100 from the stored state into the deployed state. It should be noted that fig. 1 shows only a portion of the airbag 100, and the airbag of fig. 1 is shown in a partially cut-away view in order to clearly illustrate the structure of the airbag of the present invention.

As shown in fig. 1 and 2 (a), the draw-out tape 200 includes a first end 201 and a second end 202, wherein the first end 201 is fixed to the inside of the air bag 100 via a seam 300 and the second end 202 is located at the outside of the air bag. It can be appreciated that in fig. 1, the first end 201 of the draw-out tape 200 and the air bag 100 are sewn together by a seam 300, and the air bag 100 defines a substantially closed space, i.e., the inside of the air bag 100. In an alternative embodiment, the airbag 10 further includes a mounting member (not shown) located outside the airbag 100, via which the second end 202 of the draw-out tape 200 is fixed to a predetermined position of the vehicle. As one example, the mount may be a piece of metal in the form of a key buckle, i.e., the mount has a looped connecting end, and the second end 202 of the outer draw strap 200 is passed around the hole of the connecting end of the mount and secured (e.g., via stitching) at the connecting end.

Furthermore, in the airbag 10 according to the first embodiment of the present invention, as shown in fig. 2 (a), the outer draw tape 200 further includes two protrusions 203, and the protrusions 203 are located between the first end 201 and the second end 202 of the outer draw tape 200. When the airbag 100 is in the stowed state, both the first end 201 and the protrusion 203 are positioned on the inside of the airbag 100, and the second end 202 is positioned on the outside of the airbag. In other words, the left end of the outer draw tape 200 in fig. 1 is disposed outside the airbag 100, for example, fixed at a predetermined position above the side door of the vehicle. As described previously, for the draw-out tape, it is desirable that its portion located outside the air bag is as short as possible when the air bag is mounted to a predetermined position of the vehicle in a stored state; and, when the air bag is inflated and deployed, the portion of the outer pulling strip located outside the air bag is as long as possible to ensure that the air bag in the deployed state is restrained by the outer pulling strip to have a predetermined shape and/or size.

In order to solve the above technical problem, in the airbag 10 of the present invention, as shown in fig. 2 (b), the airbag 100 further includes a groove 101 for the outer pulling strap 200 to pass through, the groove 101 is used for combining with the protrusion 203, and the two determine the length of the outer pulling strap 200 located outside the airbag 100, and the principle is as follows: when the airbag 100 is converted from the storage state to the deployment state, the volume thereof becomes large, thereby making the distance from the groove 101 of the airbag 100 to the second end 202 of the draw-out tape 200 long, and at the same time, the distance from the second end 202 of the draw-out tape 200 to the protrusion 203 as a part of the draw-out tape 200 remains constant, so that relative movement occurs between the groove 101 and the protrusion 203 of the airbag 100, resulting in the protrusion 203 finally passing through the groove 101.

Therefore, in the airbag 10 of the present invention, when the airbag 100 is changed from the stored state to the deployed state, the protrusion 203 passes through the groove 101 to be positioned from the inner side of the airbag 100 to the outer side of the airbag 100, so that more and more portions of the outer pulling tape 200 are positioned at the outer side of the airbag 100 after passing through the groove 101, thereby achieving that the length of the outer pulling tape 200 located at the outer side of the airbag 100 is shorter when the airbag 100 is in the stored state and longer when the airbag 100 is in the deployed state.

In the first embodiment of the present invention, as shown in fig. 2 (a), the outer draw tape 200 is made of one piece of fabric, and the outer draw tape 200 includes a strip-shaped main body portion which is substantially rectangular in shape and extends in the left-right direction, that is, the length direction of the main body portion is along the left-right direction of fig. 2 (a), and the two protrusions 203 are configured to protrude from the upper and lower sides of the main body portion along the width direction of the main body portion, respectively, further, the protrusions 203 may be configured to extend from the main body portion along the width direction thereof and then extend toward the second end 202 along the length direction thereof, which has the following advantages: since the protrusion 203 has a portion extending toward the groove 101 when the airbag 100 is in the stored state, the protrusion 203 maintains a certain gap with respect to the groove 101, and the protrusion 203 of the pull tape 200 is less likely to be pulled by mistake and fall out of the airbag 100. Alternatively, the main body portion and the protruding portion 203 of the outer draw tape 200 are formed from a piece of fabric via a cutting process to cost-effectively and efficiently manufacture the outer draw tape.

As an embodiment of the present invention, a force weakening region is provided at an edge of the groove 101 of the air bag 100, and the force weakening region is provided to result in an opening area of the groove 101 being easily enlarged, thereby enabling the protrusion 203 of the outer draw tape 200 to be easily positioned to the outside of the air bag 100 through the groove 101 when the air bag 100 is changed from the storage state to the deployment state.

Fig. 3 schematically shows an airbag according to a second embodiment of the present invention, and fig. 5 shows an overall view thereof. Hereinafter, another airbag according to a second embodiment of the present invention will be described with reference to fig. 3 and 5.

The airbag in the second embodiment of the present invention uses an air curtain as an example.

It should be noted that the airbag according to the second embodiment of the present invention shown in fig. 3 is substantially the same as the airbag according to the first embodiment of the present invention which has been described above with reference to fig. 1, fig. 2 (a) and fig. 2 (b), and therefore, the difference between them will be mainly described below, and the same points will not be described again to avoid redundancy.

As shown in fig. 3 and 5, the draw-out tape 200 includes a first cloth configured as a strip-shaped body portion and a second cloth configured to be attached to a side of the first cloth to form a protrusion portion 203 protruding from a thickness direction of the body portion. Alternatively, the first and second fabrics are woven fabrics, and the second fabric is in the shape of a rectangle, and the second fabric is fixed to the thickness-direction surface of the first fabric via stitches.

As an embodiment of the invention, the force weakening zone is configured as one or more tear lines. As an embodiment of the present invention, the groove of the air bag is configured as a rectangular groove. Of course, these embodiments are merely examples and the force weakening zone comprises other forms, for example the edges of the slot are formed by a thinner thickness of fabric than other parts of the air bag, and/or the shape of the slot may be designed to be other shapes depending on the circumstances.

The following schemes have existed: in order to ensure that the length of the part of the outer pull belt positioned outside the air bag is short, the outer pull belt is pre-sewn, namely, a part of the outer pull belt is folded and then sewn together, so that a station and an operator are required to be arranged for the pre-sewing operation, and the manufacturing cost of the air bag is high; in addition, for the design with more folding layers, the operation difficulty of operators in sewing is higher, and the outer pull belt is folded manually, so that the size of the part of the outer pull belt positioned at the outer side of the air bag is not accurately controlled; meanwhile, the pre-sewing thread for the outer draw tape is a relatively weak sewing thread, so that there is a large risk of thread separation.

Therefore, compare in above-mentioned current scheme the utility model discloses an among the air bag, mutually support between the groove through the jut of outer stretching strap and air pocket, can accurately design outer stretching strap when the air pocket is in the state of accomodating the size of the part that is located the air pocket outside, and the jut is difficult for coming off from the air pocket inboard, and has left out the operation of sewing in advance, consequently, the utility model discloses an air bag has the less beneficial effect of manufacturing step and manufacturing cost is lower.

Although the airbag of the present invention has been described with reference to the first and second embodiments described above, both of them are merely examples, and the airbag of the present invention also includes an embodiment in which the first and second embodiments are combined, or the number, shape, and arrangement position of the protrusions may be modified according to actual circumstances.

As described above, although the exemplary embodiments of the present invention have been described in the description with reference to the drawings, the present invention is not limited to the above-described embodiments, and the scope of the present invention should be defined by the claims and their equivalents.

Claims

1. An airbag (10) comprising:

an airbag (100) having an expanded state and a stored state, and,

an outer draw tape (200) which is located at least partially outside the gas bag (100) and is used to limit the deployment of the gas bag (100),

it is characterized in that the preparation method is characterized in that,

the draw-out tape (200) comprising a first end (201), a second end (202) and a protrusion (203) located between the first end (201) and the second end (202), the first end (201) and the protrusion (203) both being positioned inside the air bag (100) when the air bag (100) is in the stowed state, the second end (202) being positioned outside the air bag (100),

the gas bag (100) comprises a slot (101) for the passage of the outer pulling strap (200), the protrusion (203) passing through the slot (101) to be positioned from the inside of the gas bag (100) to the outside of the gas bag (100) when the gas bag (100) is transferred from the stowed state to the deployed state, such that more and more parts of the outer pulling strap (200) are positioned outside the gas bag (100) after passing through the slot (101).

2. The airbag (10) of claim 1 wherein a region of force weakness is provided at an edge of the trough (101) of the bag (100).

3. The airbag (10) according to claim 2, wherein the draw-out tape (200) is formed of a piece of fabric, and wherein the draw-out tape (200) includes a strip-shaped main body portion, and two of the protruding portions (203) are configured to protrude in a width direction from one side of the main body portion, respectively.

4. The airbag (10) of claim 2 wherein the pull-out strap (200) comprises a first fabric configured as a strip-like body portion and a second fabric configured to be attached to a side of the first fabric to form a protrusion (203) protruding from the body portion in a thickness direction.

5. The airbag (10) of claim 4 wherein the airbag (10) further comprises a mounting located outside the bag (100) via which the second end (202) of the draw-out strap (200) is secured to a vehicle at a predetermined location.

6. The airbag (10) of claim 5 wherein the mounting is a metal piece and has a looped attachment end, the second end (202) of the pull-out strap (200) passing around a hole in the attachment end of the mounting and being secured at the attachment end.

7. The airbag (10) of claim 2 wherein the force weakened area is configured as one or more tear lines.

8. The airbag (10) of claim 1, wherein the groove (101) of the airbag (100) is configured as a rectangular groove.

9. The airbag (10) of claim 3 wherein the body portion and the protrusion (203) of the drawout tape (200) are formed from a piece of fabric via a cutting process.

10. The airbag (10) of claim 9 wherein the protrusion (203) is configured to extend from the body portion in a width direction thereof and then in a length direction thereof toward the second end (202).