Automobile safety air bag device

Abstract

The utility model provides an automobile safety air bag device which comprises a retainer used for being installed below an instrument board, an inflator fixed to the retainer and an air bag body fixed to the retainer, the inflator is used for inflating the air bag body, the air bag body is of a polyhedral structure after being inflated and unfolded, and the air bag body is provided with an air inlet and an air outlet. The front area of the air bag body is provided with a guide cavity communicated with the air bag body, the guide cavity is used for abutting against a front windshield after being inflated and unfolded, the guide cavity is provided with a surface at least partially matched with the front windshield after being inflated and unfolded, and the surface forms a supporting face used for adjusting the unfolding direction of the air bag body. Directional unfolding of the air bag body is achieved, and the situation that the air bag deviates from a preset protection position due to the fact that the air bag is affected by the inclined face of the front windshield in the unfolding process is avoided.

Description

Technical Field

[0001] The utility model relates to an airbag device, in particular to an automobile safety airbag device, and belongs to the technical field of automobile passive safety. Background Art

[0002] Currently, with the development of automobile design, the inclination angles of windshields of different models vary. For models with a smaller windshield inclination angle (i.e., the angle between the bottom of the windshield and the front of the instrument panel), the airbag located below the vehicle instrument panel is guided by the windshield during deployment and tilted toward the occupant's head, thereby providing protection for the occupant's head. However, for models with a larger windshield inclination angle, the airbag of a traditional airbag system is guided by the windshield during deployment and deflected upward, rather than tilted toward the occupant's head. As a result, the airbag cannot effectively cover the impact area of the occupant's head, reducing the protective effect on the occupant's head. Utility Model Content

[0003] Based on the above background, the purpose of the present utility model is to provide an automobile airbag device to achieve directional deployment of the airbag body and prevent the airbag from deviating from the predetermined protection position due to the influence of the inclined surface of the front windshield during deployment.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions:

[0005] An automobile airbag device includes a retainer for installation under an instrument panel, an inflator fixed to the retainer, and an airbag body fixed to the retainer, the inflator being used to inflate the airbag body, the airbag body having a polyhedral structure after inflation and deployment, a guide cavity being provided in a front region of the airbag body connected thereto, the guide cavity being used to abut against the front windshield after inflation and deployment, the guide cavity having a surface at least partially adapted to the front windshield after inflation and deployment, the surface forming a support surface for adjusting the deployment direction of the airbag body.

[0006] Preferably, the airbag body comprises a front wall, a rear wall, a top wall, a bottom wall and at least two side walls, and the guide cavity is arranged at a position of the top wall adjacent to the front wall.

[0007] Preferably, after the airbag body is inflated and unfolded, the front wall is tilted relative to the bottom wall.

[0008] Preferably, the angle formed by the extended surface of the front wall body and the extended surface of the bottom wall body is not greater than the angle formed by the bottom end of the front windshield and the front end of the instrument panel.

[0009] Preferably, each of the two side walls is provided with at least one exhaust hole.

[0010] Preferably, the surface of the guide cavity is provided with an anti-skid layer, which can increase the friction between the guide cavity and the front windshield, prevent the guide cavity from slipping relative to the front windshield during deployment, and better support the airbag body.

[0011] Preferably, the anti-slip layer is provided on the surface of the guide cavity in a coating manner.

[0012] Preferably, the guide cavity has an arc-shaped cross-section after being inflated and expanded.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The utility model provides an automobile airbag device, which, through a guide cavity provided in the front area of the airbag body, abuts against the front windshield after inflation and deployment, thereby forming a stable support structure for the airbag body, so that the airbag body and the front windshield are kept at an appropriate distance, avoiding the airbag body from drifting upward, ensuring that the deployed position of the airbag body effectively covers the collision area of the occupant's head, and improving the protection effect on the occupant's head. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0016] Figure 1 This is a structural diagram of an automobile airbag device of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the guide cavity in the present utility model;

[0018] In the figure: 1. instrument panel; 2. front windshield; 3. retainer; 4. inflator; 5. airbag body; 6. guide cavity; 501. front wall; 502. rear wall; 503. top wall; 504. bottom wall; 505. side wall; 506. exhaust hole; 601. anti-slip layer. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the technical solution of the present invention through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any form of modification and / or change made to the present invention will fall within the scope of protection of the present invention.

[0020] In this utility model, unless otherwise specified, all parts and percentages are by weight. The equipment and raw materials used are commercially available or commonly used in the art. The methods in the following embodiments, unless otherwise specified, are conventional methods in the art. The components or equipment in the following embodiments, unless otherwise specified, are all common standard parts or components known to those skilled in the art. Their structures and principles are known to those skilled in the art through technical manuals or routine experimental methods.

[0021] The following detailed description of the embodiments of the present invention is made in conjunction with the accompanying drawings. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments can also be implemented by those skilled in the art without these specific details.

[0022] An embodiment of the present utility model discloses an automobile airbag device, comprising a retainer 3 for mounting below an instrument panel 1, an inflator 4 secured to the retainer 3, and an airbag body 5 secured to the retainer 3. The inflator 4 is used to inflate the airbag body 5, which, when inflated and deployed, assumes a polyhedral structure. A guide cavity 6 is provided in communication with the front region of the airbag body 5. The guide cavity 6 is configured to abut against the front windshield 2 after inflation and deployment. The guide cavity 6, when inflated and deployed, has a surface that at least partially conforms to the front windshield 2, forming a support surface for adjusting the deployment direction of the airbag body 5.

[0023] Specifically, the airbag body 5 includes a front wall 501, a rear wall 502, a top wall 503, a bottom wall 504, and at least two side walls 505. The guide cavity 6 is disposed on the top wall 503 adjacent to the front wall 501. By designing the airbag body 5 as a polyhedron, combined with the aforementioned guide cavity 6, the airbag body 5 can maintain a stable geometric shape during deployment.

[0024] Specifically, after the airbag body 5 is inflated and deployed, the front wall 501 is tilted relative to the bottom wall 504. The tilted arrangement of the front wall 501 and the bottom wall 504 enables the airbag body to better adapt to the spatial configuration of the vehicle's front cabin, which is beneficial to the protection effect on the occupants.

[0025] Specifically, the angle formed by the extended surface of the front wall 501 and the extended surface of the bottom wall 504 is no greater than the angle formed by the bottom end of the front windshield 2 and the front end of the instrument panel 1. By limiting the angle between the front wall 501 and the bottom wall 504, the airbag body is ensured not to be subjected to excessive force during deployment, thereby preventing deployment from being hindered.

[0026] Specifically, each of the two side walls 505 is provided with an exhaust hole 506. The exhaust holes 506 are used to promptly exhaust excess gas from the airbag body 5 after the airbag body 5 is inflated and deployed to protect the occupant's head from a collision, thereby preventing secondary damage to the occupant's head. Of course, the number of exhaust holes 506 can be adjusted according to actual needs.

[0027] Specifically, the surface of the guide cavity 6 is provided with an anti-slip layer 601. This layer increases friction between the guide cavity 6 and the front windshield 2, preventing the guide cavity 6 from slipping relative to the front windshield 2 during deployment and providing better support for the airbag body 5. The anti-slip layer 601 is applied to the surface of the guide cavity 6 by coating. Applying the anti-slip layer 601 by coating is simple, provides a secure bond, and does not affect the overall structural strength of the airbag.

[0028] Specifically, the guide cavity 6 has an arcuate cross-sectional shape after being inflated and expanded. The arcuate cross-sectional shape enables the guide cavity 6 to better adapt to the curved surface of the front windshield 2, thereby improving the stability and reliability of the support.

[0029] The working principle of the automobile airbag device is that when the car collides, the sensor trigger signal is transmitted to the airbag control unit, which then issues a command to activate the inflator 4 of the automobile airbag device. The high-pressure gas generated by the inflator 4 enters the airbag body 5 and the guide cavity 6 almost simultaneously, causing it to deploy rapidly. The guide cavity 6 with an anti-slip layer 601 abuts against the inner surface of the front windshield 2 to form a stable support surface and prevent slipping, so that the airbag body 5 maintains an appropriate distance from the front windshield 2 and is tilted toward the occupant's head, thereby effectively covering the collision area of the occupant's head.

[0030] The automobile airbag device, through the guide cavity 6 provided in the front area of the airbag body 5, abuts against the front windshield 2 after inflation and deployment, thereby forming a stable support structure for the airbag body 5, so that the airbag body 5 and the front windshield 2 maintain an appropriate distance, preventing the airbag body 5 from drifting upward, ensuring that the deployed position of the airbag body 5 effectively covers the collision area of the occupant's head, and improving the protection effect on the occupant's head.

[0031] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An automobile airbag device, characterized in that: The automobile airbag device comprises a retainer (3) for being installed below an instrument panel (1), an inflator (4) fixed on the retainer (3), and an airbag body (5) fixed on the retainer (3); the inflator (4) is used to inflate the airbag body (5); the airbag body (5) has a polyhedral structure after being inflated and deployed; a guide cavity (6) in communication with the airbag body (5) is provided in a front region of the airbag body (5); the guide cavity (6) is used to abut against a front windshield (2) after being inflated and deployed; the guide cavity (6) has a surface at least partially adapted to the front windshield (2) after being inflated and deployed, and the surface forms a support surface for adjusting the deployment direction of the airbag body (5).

2. The automobile airbag device according to claim 1, characterized in that: The air bag body (5) comprises a front wall (501), a rear wall (502), a top wall (503), a bottom wall (504) and at least two side walls (505), and the guide cavity (6) is arranged at a position on the top wall (503) adjacent to the front wall (501).

3. The automobile airbag device according to claim 2, characterized in that: After the air bag body (5) is inflated and unfolded, the front wall (501) is arranged tilted relative to the bottom wall (504).

4. The automobile airbag device according to claim 3, characterized in that: The angle formed by the extended surface of the front wall body (501) and the extended surface of the bottom wall body (504) is not greater than the angle formed by the bottom end of the front windshield (2) and the front end of the instrument panel (1).

5. The automobile airbag device according to claim 2, characterized in that: The two side walls (505) are respectively provided with at least one exhaust hole (506).

6. The automobile airbag device according to claim 1, characterized in that: The surface of the guide cavity (6) is provided with an anti-slip layer (601).

7. The automobile airbag device according to claim 6, characterized in that: The anti-slip layer (601) is provided on the surface of the guide cavity (6) in a coating manner.

8. The automobile airbag device according to claim 1, characterized in that: The guide cavity (6) has an arc-shaped cross-section after being inflated and expanded.

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