Automobile knee safety air bag

Abstract

The utility model relates to the field of automobile safety air bags, and provides an automobile knee safety air bag which is characterized in that a cover cap covers an air bag assembly, the cover cap is provided with two turned-over edges, a tearing line is arranged at the joint of one turned-over edge and the cover cap, and long-strip-shaped pre-splitting holes are distributed in the tearing line, so that the strength of the cover cap is weakened, tearing in the explosion process is facilitated, and the air bag can be smoothly unfolded; the other turnup is connected with the cover cap through a plurality of hinges, and the joint is arc-shaped and thin, so that the cover cap is turned over smoothly and is prevented from being unhooked due to explosion impact; according to the utility model, the flanging is clamped with the Z-shaped mounting arm of the metal box body through the plurality of mounting grooves, the hinge abuts against the Z-shaped mounting arm, and the abutting block abuts against the Z-shaped mounting arm on the other side, so that the clamping stability of the Z-shaped mounting arms is ensured, and the metal box body and the cover cap are firmly mounted.

Description

A type of car knee airbag Technical Field

[0001] This utility model relates to the field of automotive airbags, and more particularly to an automotive knee airbag. Background Technology

[0002] An airbag system is an auxiliary safety system in automobiles. Its working principle is that when sensors detect a relevant collision signal, the control unit determines whether to deploy the airbag. Upon receiving the deployment signal, the gas generator produces a large amount of gas in a short time to inflate the airbag, forming a cushion to protect passengers from secondary collision injuries. Knee airbags, on the other hand, protect the driver's lower legs and knees from injury.

[0003] The knee airbag is an essential component of the airbag system, consisting mainly of a metal housing, cover, generator, and airbag. The airbag needs to deploy from the bottom of the dashboard upwards (closely against the knee pads) to fully protect the driver's lower legs and knees. Currently, the design of the knee airbag cover lacks functional advantages and is only used as a dust cover. The smooth tearing and flipping guidance of the knee airbag cover plays a crucial role in product performance. Further reducing the tear line thickness will cause shrinkage marks and other appearance defects due to molding issues. During airbag deployment, the cover, subjected to the pressure impact of the generator, can rapidly flip and detach from the metal housing, potentially injuring the occupant. Therefore, solving these problems is extremely important. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a car knee airbag, which solves the problems in the background art.

[0005] To achieve the above objectives, this utility model provides a car knee airbag, comprising a cover, an airbag assembly, and a metal housing. The airbag assembly is disposed within the metal housing, with one side of the airbag assembly protruding from the metal housing. The cover covers the protruding portion of the airbag assembly within the metal housing. The cover is rectangular, with its two longer sides bent towards one side of the metal housing to form flanges, which are attached to both sides of the metal housing. One flange is connected to the cover at a tear line with pre-splitting holes arranged in a dotted line pattern. The other flange is connected to the cover via multiple hinges, and this flange is arc-shaped at its connection to the cover, with a thickness less than that of the flange and the cover. Both flanges have multiple mounting grooves on their surfaces, and the metal housing has Z-shaped mounting arms that match the multiple mounting grooves. The Z-shaped mounting arms are inserted into the mounting grooves for engagement.

[0006] Preferably, the tear line is pointed, and the pre-splitting hole is elongated.

[0007] Preferably, the hinge is disposed at the mounting groove, with one end of the hinge abutting against the Z-shaped mounting arm; a stop block is provided at the mounting groove on one side of the tear line, with one end of the stop block abutting against the Z-shaped mounting arm.

[0008] Preferably, a gas generator is provided inside the air bag assembly.

[0009] Preferably, a generator bracket is provided on one side of the gas generator, and a bolt is provided on one side of the generator bracket. The bolt passes through the gas bag assembly and the metal box and is fixed to the metal box by a nut.

[0010] Preferably, the generator bracket matches the shape of the gas generator, and the generator bracket is provided with clamps to fix the gas generator.

[0011] Preferably, the surface of the metal box is provided with multiple mounting brackets for installation inside the vehicle.

[0012] The beneficial effects of this utility model are as follows: This utility model uses a cover to enclose the gas bag assembly. The cover has two flanges. One flange has a tear line at its connection with the cover, with elongated pre-splitting holes distributed along the tear line. This weakens the cover's strength, making it easier to tear during the detonation process, allowing the gas bag to unfold smoothly. The other flange is connected to the cover by multiple hinges, and the connection point is arc-shaped and thin, ensuring smooth cover flipping and preventing it from disengaging due to the detonation impact. The flange is engaged with the Z-shaped mounting arms of the metal housing through multiple mounting slots. The hinges abut against the Z-shaped mounting arms, and abutment blocks abut against the Z-shaped mounting arms on the other side, ensuring the stability of the Z-shaped mounting arm engagement and thus making the metal housing and cover firmly installed. The gas generator is securely fixed to the generator bracket by clamps. The gas generator is bolted through the generator bracket, passing through the gas bag assembly and the metal housing, and then fixed to the metal housing by nuts. In this way, both the gas generator and the gas bag assembly are well secured within the metal housing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 is an exploded schematic diagram of this utility model;

[0015] Figure 2 is a schematic diagram of the overall invention.

[0016] Figure 3 is a schematic diagram of the cover of this utility model;

[0017] Figure 4 is a schematic diagram of the hinge of this utility model;

[0018] Figure 5 is a schematic diagram of the tear line of this utility model.

[0019] The diagram is marked as follows:

[0020] 1-Cover, 2-Airbag assembly, 3-Metal box, 4-Flanged edge, 5-Tear line, 6-Pre-slit hole, 7-Hinge, 8-Mounting groove, 9-Z-shaped mounting arm, 10-Block, 11-Generator bracket, 12-Gas generator, 13-Mounting bracket. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] As shown in Figures 1 to 5, this embodiment provides a car knee airbag, including a cover 1, an airbag assembly 2, and a metal housing 3. The surface of the metal housing 3 is provided with multiple mounting brackets 13 for installation inside the vehicle. The airbag assembly 2 is disposed inside the metal housing 3, with one side of the airbag assembly 2 protruding outside the metal housing 3. The cover 1 covers the protruding part of the airbag assembly 2 within the metal housing 3. The cover 1 is rectangular, with its two long sides bent towards one side of the metal housing 3 to form flanges 4, which are attached to both sides of the metal housing 3. One of the flanges 4 connects to the cover 1 at a tear line 5, with pre-splitting holes 6 arranged in a dotted line shape. The tear line 5 is pointed, and the pre-splitting holes 6 are elongated. Another flange 4 is connected to the cover 1 via multiple hinges 7. This flange 4 connects to the cover 1 at an arc shape, and its thickness at this point is thinner than the thickness of the flange 4 and the cover 1. By setting a cover 1 to cover the gas bag assembly 2, the cover 1 is provided with two flanges 4. One flange 4 is connected to the cover 1 with a tear line 5. The tear line 5 is distributed with long strip-shaped pre-splitting holes 6. This weakens the strength of the cover 1 and makes it easier to tear during the ignition process, so that the gas bag can be deployed smoothly. The other flange 4 is connected to the cover 1 by multiple hinges 7, and the connection is arc-shaped and thin. This makes the cover 1 flip smoothly and avoids being disengaged by the impact of ignition.

[0024] Both flanges 4 have multiple mounting slots 8 on their surfaces. The metal housing 3 has Z-shaped mounting arms 9 that match the mounting slots 8, and these arms are inserted into the slots 8 for engagement. A hinge 7 is located at one of the mounting slots 8, with one end abutting against the Z-shaped mounting arm 9. A stop block 10 is located at the mounting slot 8 on one side of the flange 4 along the tear line 5, with one end abutting against the Z-shaped mounting arm 9. The flanges 4 engage with the Z-shaped mounting arms 9 of the metal housing 3 through the multiple mounting slots 8, and the hinge 7 abuts against the Z-shaped mounting arms 9. The stop block 10 also abuts against the Z-shaped mounting arms 9 on the other side, ensuring the stability of the engagement and thus securing the metal housing 3 to the cover 1.

[0025] A gas generator 12 is installed inside the gas bag assembly 2. A generator bracket 11 is provided on one side of the gas generator 12, and a bolt is provided on one side of the generator bracket 11. The bolt passes through the gas bag assembly 2 and the metal housing 3, and is fixed to the metal housing 3 by a nut. The generator bracket 11 is shaped to match the gas generator 12, and a clamp is provided on the generator bracket 11 to fix the gas generator 12. The gas generator 12 is securely fixed to the generator bracket 11 by the clamp, and the gas generator 12 is fixed to the metal housing 3 by the bolt passing through the gas bag assembly 2 and the metal housing 3 by the nut. In this way, both the gas generator 11 and the gas bag assembly 2 are well fixed inside the metal housing 3; and a sealing ring is provided at the bolt passage point on the gas bag assembly 3 for sealing.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this utility model is limited to these examples; within the framework of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above, which are not provided in the details for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A car knee airbag, comprising a cover (1), an airbag assembly (2), and a metal housing (3), wherein the airbag assembly (2) is disposed within the metal housing (3), one side of the airbag assembly (2) protrudes from the metal housing (3), and the cover (1) covers the portion of the airbag assembly (2) protruding from the metal housing (3), characterized in that, The cover (1) is rectangular. The two long sides of the cover (1) are bent towards the metal box (3) to form flanges (4). The flanges (4) are attached to the two sides of the metal box (3). One of the flanges (4) is connected to the cover (1) by a tear line (5). The tear line (5) is distributed with pre-cracked holes (6) in the shape of dashed lines. The other flange (4) is connected to the cover (1) by multiple hinges (7). The flange (4) is connected to the cover (1) by an arc shape. The thickness of this flange (4) is thinner than the thickness of the flange (4) and the cover (1). Multiple mounting grooves (8) are opened on the surface of both flanges (4). Z-shaped mounting arms (9) matching multiple mounting grooves (8) are provided on the metal box (3). The Z-shaped mounting arms (9) are inserted into the mounting grooves (8) and snapped in place.

2. The automotive knee airbag according to claim 1, wherein The tear line (5) is pointed, and the pre-crack hole (6) is elongated.

3. The automotive knee airbag according to claim 2, characterized in that, The hinge (7) is located at the mounting groove (8), and one end of the hinge (7) abuts against the Z-shaped mounting arm (9); a stop block (10) is provided at the mounting groove (8) of the flange (4) on one side of the tear line (5), and one end of the stop block (10) abuts against the Z-shaped mounting arm (9).

4. The automotive knee airbag according to claim 1, wherein A gas generator (12) is installed inside the air bag assembly (2).

5. The automotive knee airbag according to claim 4, wherein A generator bracket (11) is provided on one side of the gas generator (12), and a bolt is provided on one side of the generator bracket (11). The bolt passes through the gas bag assembly (2) and the metal box (3) and is fixed together with the metal box (3) by a nut.

6. The automotive knee airbag according to claim 5, wherein The generator bracket (11) matches the shape of the gas generator (12), and the generator bracket (11) is provided with a clamp to fix the gas generator (12).

7. The automotive knee airbag according to claim 1, characterized in that, The surface of the metal box (3) is provided with multiple mounting brackets (13) for installation inside the vehicle.

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