CN112896088B - Bag and adopt its air bag device - Google Patents

Abstract

The invention discloses a pouch and an airbag device using the same, and relates to the technical field of passive safety of automobiles. A specific embodiment of the pouch includes: a pouch body and a first vent hole arranged on the pouch body, the pouch body is further provided with an exhaust adjustment device, and the pouch body drives the exhaust adjustment during the expansion process of the pouch body The device gradually closes the first exhaust hole, and the exhaust adjustment device completely closes the first exhaust hole and then locks itself to prevent the closed first exhaust hole from being opened again. This embodiment has the advantages of low design cost, simple structure, and easy implementation. After the first exhaust hole is closed, it can be guaranteed to be stably locked, and will not be repeatedly opened.

Description

A bag and an airbag device using the same

technical field

The invention relates to the technical field of passive safety of automobiles, in particular to a bag and an airbag device using the same.

Background technique

For the protection of occupants in an out-of-position sitting position, two-stage gas generators or complex exhaust auxiliary hole mechanisms are generally used in technology to achieve this goal. This solution has high cost and complex structure, which not only affects the stability of the deployment posture of the airbag device, but also has disadvantages such as re-opening of the secondary exhaust hole when the airbag is compressed by the occupant during a collision.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present invention provide a bladder bag and an airbag device using the same, which have low design cost, simple structure, and easy implementation.

In order to achieve the above object, according to one aspect of the embodiments of the present invention, there is provided a bag for an airbag device, comprising a bag body and a first air vent provided on the bag body, the bag body being There is also an exhaust adjustment device, which drives the exhaust adjustment device to gradually close the first exhaust hole during the unfolding process of the bag body, and the exhaust adjustment device completely closes the first exhaust hole and then automatically It is locked to prevent the closed first vent hole from being opened again.

Optionally, the exhaust adjustment device includes a baffle and a pull strap; the baffle includes a fixed end and a pulling end, the baffle fixed end is fixed on the bladder body by a fixing member, and the baffle The pulling end is connected to the bag body through the pulling strap, and the pulling end of the baffle is pulled by the pulling strap during the unfolding process of the bag body to gradually close the first air vent until it is finally completely closed After the first exhaust hole, the pull strap is self-locking to prevent the pull end of the blocking piece from moving again.

Optionally, when the bag body is not unfolded, the pulling end of the baffle is located on one side of the first air vent, and the other side of the first air vent is further provided with a drawstring fixing member, and the One end of the drawstring fixing member is fixedly arranged on the bag body, and the other end is the drawstring locking end. The baffle pulling end and the drawstring locking end are respectively provided with a first locking hole and a second locking hole. A locking hole, the drawstring is folded in half to form a half-folded end and a bifurcated end, and the forked end of the drawstring passes through the second locking hole and the first locking hole in sequence, and is folded in half through the drawstring The inside of the end is passed through and then fixedly connected to the bag body.

Optionally, the fixing end of the baffle is fixed around the first air vent, and the pulling end of the baffle extends in a direction away from the first air vent; during the unfolding of the bag body, the The pulling end of the blocking piece at the distal end of the pulling strap is folded toward the first air vent until it completely covers the first air vent and then self-locking.

Optionally, the blocking piece and the drawstring fixing member are an integral piece of cloth covering the first air vent, and the integral piece of cloth is provided with a through hole matching the first air vent. , the one-piece cloth sheet is fixed on the pouch body along the circumferential direction of the through hole to form a blocking piece fixed end, and one side of the one-piece cloth sheet extends in a direction away from the first exhaust hole to form At the pulling end of the blocking piece, the other side of the one-piece cloth piece extends in the other direction away from the first exhaust hole to form the locking end of the pulling belt.

Optionally, the fixing end of the baffle is fixed on one side of the first exhaust hole, and the pulling end of the baffle is located between the fixing end of the baffle and the first exhaust hole; the bag During the unfolding process of the bag body, the pulling strap can pull the pulling end of the blocking piece to extend toward the first air vent until it completely covers the first air vent and then locks itself.

Optionally, the bag body is further provided with a guide cloth covering the first air vent, and the guide cloth is provided with a through hole matching the first air vent; the During the unfolding process of the bag body, the pulling strap can pull the pulling end of the blocking piece to expand in the guiding cloth piece.

Optionally, the pulling end of the baffle is pre-fixed on the pouch body by means of suture or adhesive.

Optionally, the bag body is provided with a normally open second vent hole.

An embodiment of the present invention also provides an airbag device, comprising: a casing, a gas generator and the pouch provided in the first aspect of the embodiment of the present invention; the pouch is folded and arranged in the casing, and the gas generator is used for the pouch Inflate to deploy the bladder.

One embodiment of the above invention has the following advantages or beneficial effects: during the unfolding process of the bag body, the exhaust adjustment device is used to gradually close the first exhaust hole, and after the first exhaust hole is completely closed, it is self-locking, so that it can be The closed first exhaust hole is prevented from being opened again, the design cost is low, the structure is simple, and the realization is easy.

Further effects of the above non-conventional alternatives will be described below in conjunction with specific embodiments.

Description of drawings

The accompanying drawings are used for better understanding of the present invention and do not constitute an improper limitation of the present invention. in:

1 is a schematic diagram of an exhaust gas regulating device not closing a first exhaust hole according to some embodiments of the present invention;

Fig. 2 is a sectional view along the A-A direction in Fig. 1;

3 is a schematic diagram of the exhaust gas regulating device closing the first exhaust hole in the embodiment shown in FIG. 1;

Fig. 4 is the sectional view along the B-B direction in Fig. 3;

5 is a schematic diagram of the exhaust gas adjusting device not closing the first exhaust hole according to other embodiments of the present invention;

6 is a schematic diagram of the exhaust gas regulating device closing the first exhaust hole in the embodiment shown in FIG. 5;

Fig. 7 is the schematic diagram of the initial stage of the expansion of the pouch body under the normal sitting posture;

8 is a schematic diagram of the contact between the bag body and the occupant under the normal sitting posture;

Figure 9 is a schematic diagram of the bag body being compressed by the occupant under the normal sitting posture;

Fig. 10 is a schematic diagram of the initial stage of the deployment of the bag body in the case of an off-position sitting posture;

FIG. 11 is a partial enlarged schematic view of C in FIG. 10 .

Detailed ways

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, which include various details of the embodiments of the present invention to facilitate understanding and should be considered as exemplary only. 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 from the following description for clarity and conciseness.

The pouch used for the airbag device of the present invention includes a pouch body 10 , a first exhaust hole 30 and an exhaust adjustment device 40 provided on the pouch body 10 . The bag body 10 is used for inflow of inflation gas, and is deployed from the folded state to the passenger area. The exhaust adjustment device 40 may be provided on the outside or inside of the bag body 10 . Optionally, the exhaust adjustment device 40 is disposed inside the bag body 10 to avoid possible damage to the occupant caused by the combination of the exhaust adjustment device 40 and the bag body 10 .

The first vent hole 30 is a closable vent hole, which is used to discharge part of the gas flowing into the bag body 10 during the unfolding process of the bag body 10 , and drives the exhaust adjusting device 40 to gradually increase during the unfolding process of the bag body 10 . The degree of closing of the first exhaust hole 30 is until the first exhaust hole 30 is completely closed. By using the exhaust adjusting device 40 to adjust the closing degree of the first exhaust hole 30, the discharge amount of the inflation gas can be controlled under different working conditions. The exhaust adjusting device 40 completely closes the first exhaust hole 30 and then locks itself to prevent the closed first exhaust hole 30 from being opened again, thereby improving the safety of the bag. The bladder bag of the invention has low design cost, simple structure and easy realization.

The exhaust adjustment device 40 includes a baffle 41 and a pull strap 42 . The baffle 41 includes a fixed end and a pulling end. The fixed end of the blocking piece 41 is fixed on the bag body 10 by a fixing member, for example, it is sewn on the bag body 10 by means of adhesive or suture. The pulling end of the blocking piece 41 is connected to the bag body 10 through the pulling belt 42. During the unfolding of the bag body 10, the pulling end of the blocking piece 41 is pulled by the pulling belt 42 to gradually close the first exhaust hole 30 until the first exhaust hole 30 is finally completely closed. An exhaust hole 30 locks itself to prevent the pulling end of the blocking piece 41 from moving again. In the actual application process, the pulling end of the baffle 41 can be pre-fixed on the bag body 10, and the pulling end of the baffle 41 can be fixed on the bag body 10 when it is not inflated. After the bag body 10 is inflated, the pre-fixed structure In failure, the pull end of the flap 41 can be stretched. The pulling end of the blocking piece 41 can be sewn on the pouch body 10 by stitching, or pre-fixed on the pouch body 10 by means of adhesive. The closing degree of the first exhaust hole 30 is adjusted by the baffle and the pull strap, and the first exhaust hole 30 is locked when the first exhaust hole 30 is completely closed, the structure is simple and the cost is low.

When the bag body 10 is not unfolded, the pulling end of the blocking piece 41 is located on one side of the first air vent 30 , and the other side of the first air vent 30 is provided with a drawstring fixing member 44 . The one side and the other side mentioned here can be, for example, the left and right sides, the upper and lower sides, and the like. One end of the drawstring fixing member 44 is fixedly arranged on the bag body 10 (as shown in FIGS. 1 and 5 ), and the other end is the drawstring locking end. The pulling end of the baffle 41 and the drawstring fixing member 44 are respectively provided with a first The locking hole 411 and the second locking hole 441, the drawstring 42 is folded in half to form a half-folded end (421) and a bifurcated end 422, and the fork end 422 of the drawstring 42 passes through the second locking hole and the first locking hole in turn, It is fixedly connected to the bag body 10 after passing through the inside of the folded ends 421 of the drawstring 42 .

The first locking hole 411 on the blocking piece 41 can be a hole opened on the blocking piece, or a hole structure sewn on the blocking piece. A locking hole. The form of the drawstring fixing member 44 can be selectively set according to the actual situation. In some optional embodiments, the drawstring fixing member 44 is a sheet-like structure, such as a cloth sheet, and the second locking hole 441 can also be a hole opened on the blocking piece, or a hole structure sewn on the blocking piece, . In other optional embodiments, the drawstring fixing member 44 is a belt-like structure, such as a knotted rope, and the hole formed by the knot on the rope is the second locking hole. By providing the drawstring fixing member 44 , the structure of the exhaust adjustment device 40 can be simplified while the closed first exhaust hole 30 can be prevented from being opened again, and the quality of the entire pouch can be reduced.

In practical application, the fixed end of the blocking piece 41 can be fixed around the first exhaust hole 30 , and the pulling end of the blocking piece 41 extends away from the first exhaust hole 30 , as shown in FIGS. 1 and 2 . During the unfolding process of the bag body 10 , the pulling end of the blocking piece 41 at the distal end is pulled by the pulling strap 42 and folded to the first air vent 30 until it completely covers the first air vent 30 and then self-locking, as shown in FIGS. 3 and 4 . Show.

The blocking piece 41 and the drawstring fixing member 44 may be a separate structure, or may be an integrated structure, such as an integrated cloth piece. The one-piece cloth sheet covers the first air vent 30 and is provided with a through hole 43 that matches the first air vent 30 . The one-piece cloth sheet is circumferentially fixed on the pouch body 10 along the through hole 43 to form a blocking piece 41 For the fixed end, one side of the integrated cloth sheet extends in one direction away from the first exhaust hole 30 to form the pulling end of the blocking piece 41 , and the other side of the integrated cloth sheet extends in the other direction away from the first exhaust hole 30 to form a pull end. With locking end. Providing the through hole 43 can partially or completely expose the first vent hole 30 when the bag body 10 is not deployed. The self-locking locking knot structure has the advantages of simple structure, good stability and low cost.

As shown in FIG. 1 , the drawstring fixing member 44 is integrally formed with the blocking piece 41 . The pulling end of the blocking piece 41 is respectively provided with a first locking hole 411 , and the pulling strap fixing member 44 is respectively provided with a second locking hole 441 . The bifurcated end 422 of the drawstring 42 passes through the second locking hole 441 and the first locking hole 411 in turn, and then passes through the inside of the folded end 421 of the drawstring 42 and is fixedly connected to the bag body 10 . Optionally, the bifurcated end of the drawstring 42 is fixedly connected inside the bag body 10 to avoid possible injury to the occupant due to the exposed joint of the drawstring 42 and the bag body 10 to the outside.

In the actual application process, the fixed end of the baffle 4 and the pulling end of the baffle 41 can be fixed on the same side of the first exhaust hole 30 , and the pulling end of the baffle 41 is located between the fixed end of the baffle 41 and the first row. Between the air holes 30 ; during the unfolding of the bag body 10 , the pulling strap 42 can pull the pulling end of the blocking piece 41 to extend toward the first vent hole 30 until it completely covers the first vent hole 30 and then locks itself. 5 and 6 , the pulling end of the baffle 41 is folded and disposed on the left side of the first air vent 30 , and the pulling end of the pull strap 42 is gradually stretched during the unfolding process of the bag body 10 , and the pulling end of the baffle 41 is gradually pulled It extends to the right side of the first exhaust hole 30, thereby gradually increasing the closing degree of the first exhaust hole 30 until the second exhaust hole 30 is completely closed and then locked. In other embodiments, the pulling end of the blocking piece 41 may also be an elastic structure. The exhaust gas regulating device of this structure has the advantages of simple structure and low design cost.

Further, a guide cloth 50 may be provided on the bag body 10 to cover the first air vent 30 , and a through hole 43 matching the first air vent 30 may be provided on the guide cloth. During the unfolding process of the bag body 10 , the pulling end of the baffle 41 can be pulled by the pulling strap 42 to expand in the guide cloth 50 . By providing the guide cloth piece 50 , the sealing efficiency and stability of the first exhaust hole 30 can be improved.

In order to avoid collision when the bag is in contact with the occupant due to the large amount of inflation of the bag during the deployment of the bag, a normally open second air vent 20 may be provided on the bag body 10, as shown in FIGS. 7, 8 and 7. 11 shown.

The aforementioned blocking piece 41 may be a cloth piece or a sheet-like structure of other materials, for example, a sheet-like structure of the same material as the pouch body. The number and shape of the first exhaust hole 20 , the second exhaust hole 30 and the through hole 43 can be selectively set according to the actual situation, for example: the number is one, two or more, and the shape is any one of the following : circle, polygon. When the shapes of the second exhaust hole 30 and the through hole 43 are circular, the centers of the two can be made to coincide.

An embodiment of the present invention also provides an airbag device, comprising: a casing, a gas generator and the pouch provided in the first aspect of the embodiment of the present invention; the pouch is folded and arranged in the casing, and the gas generator is used for the pouch Inflate to deploy the bladder.

The bag and the airbag device of the embodiments of the present invention can be used for the protection of the occupant in the case of an off-position sitting position, and can also be used for the protection of the occupant in the case of a normal sitting position. The so-called normal sitting posture means that the occupant sits on the seat with a relatively standard sitting posture, for example, the back is close to the seat back. The off-position sitting posture refers to the fact that the occupant is sitting on the seat, and the sitting posture is relatively non-standard, for example, the seat is not fully seated, and the back is not close to the seat back. In the optional embodiment shown in FIGS. 7-9 , it is a schematic diagram of the airbag according to the embodiment of the present invention used for occupant protection in a normal sitting position, the first air vent 30 is closed by the air vent adjusting device 40 and After locking, the second exhaust hole 20 is normally open. In the optional embodiment shown in FIGS. 10-11 , it is a schematic diagram showing that the airbag according to the embodiment of the present invention is used for occupant protection in the case of an out-of-position sitting position, because the airbag is not fully expanded, so that the exhaust adjustment device is not activated , the first air vent 30 and the second air vent 20 are opened at the same time to increase the air volume, thereby reducing the excessive impact of the inflated bag body 10 on the passengers.

The above-mentioned specific embodiments do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A bag for an airbag device comprises a bag body (10) and a first exhaust hole (30) arranged on the bag body (10), wherein an exhaust adjusting device (40) is further arranged on the bag body (10), and the exhaust adjusting device (40) comprises a blocking sheet (41) and a pull belt (42); the baffle (41) comprises a fixed end and a pulling end, the fixed end of the baffle (41) is fixed on the bag body (10) through a fixing part, and the pulling end of the baffle (41) is connected to the bag body (10) through the pulling belt (42); the self-locking bag is characterized in that a draw belt fixing piece (44) is further arranged on the bag body (10), the draw belt (42) is fixed on the bag body (10) after the draw belt fixing piece (44) and the separation blade (41) are pulled to form a self-locking structure, the draw belt (42) is pulled in the unfolding process of the bag body (10), the self-locking structure is gradually contracted to drive the separation blade (41) to pull the end to move towards the draw belt fixing piece (44), and the separation blade (41) is covered on the first vent hole (30).

2. The pouch of claim 1, wherein when said pouch body (10) is not unfolded, said pull tab (41) is located at one side of said first venting hole (30), said pull strap fastener (44) is located at the other side of said first venting hole (30), one end of said pull strap fastener (44) is fixedly disposed on said pouch body (10) and the other end is a pull strap locking end, said pull tab (41) pull end and said pull strap locking end are respectively provided with a first locking hole and a second locking hole, said pull strap (42) is folded to form a folded end and a bifurcated end, said bifurcated end of said pull strap (42) sequentially passes through said second locking hole and said first locking hole and is fixedly connected to said pouch body (10) after passing through the interior of said folded end of said pull strap (42).

3. A pouch according to claim 2, wherein said fixed end of said flap (41) is secured around said first venting aperture (30), said pulled end of said flap (41) extending away from said first venting aperture (30); in the unfolding process of the bag body (10), the pull strip (42) pulls the pull end of the separation blade (41) at the far end to turn over towards the first vent hole (30), and the self-locking structure is locked by itself until the first vent hole (30) is completely covered.

4. The pouch of claim 3, wherein the blocking piece (41) and the drawstring fixing member (44) are a single-piece cloth piece covering the first venting hole (30), the single-piece cloth piece is provided with a through hole (43) matching with the first venting hole (30), the single-piece cloth piece is fixed on the pouch body (10) along the circumferential direction of the through hole (43) to form a blocking piece fixing end, one side of the single-piece cloth piece extends in one direction away from the first venting hole (30) to form a blocking piece (41) pulling end, and the other side of the single-piece cloth piece extends in the other direction away from the first venting hole (30) to form a drawstring locking end.

5. The pouch of claim 2, wherein the fixed end of said flap (41) is fixed to one side of said first venting hole (30), and the pulling end of said flap (41) is located between the fixed end of said flap (41) and said first venting hole (30); in the unfolding process of the bag body (10), the pull belt (42) can pull the pull end of the baffle plate (41) to extend towards the first vent hole (30), and the self-locking structure is locked by itself after the self-locking structure completely covers the first vent hole (30).

6. A sachet according to claim 5, wherein the sachet body (10) is further provided with a guide cloth (50) covering the first vent (30), the guide cloth being provided with a through hole (43) matching the first vent (30); in the unfolding process of the bag body (10), the pull belt (42) can pull the pull end of the baffle plate (41) to stretch in the guide cloth piece (50).

7. A sachet according to any of claims 1 to 6, wherein the pull end of the flap (41) is pre-secured to the sachet body (10) by stitching or adhesive.

8. A sachet according to any of claims 1 to 6, wherein the sachet body (10) is provided with a second vent (20) which is normally open.

9. An airbag device, characterized by comprising: a housing, a gas generator and a pouch according to any of claims 1 to 8; the bag is arranged in the shell after being folded, and the gas generator is used for inflating the bag so as to unfold the bag.

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