Safety air bag for protecting knees of passenger

Abstract

The invention relates to the technical field of automobile safety equipment, in particular to a passenger knee protection airbag which comprises a mounting shell and an airbag body, the airbag body is arranged in the mounting shell, a cover is mounted on the mounting shell, a gas generator is mounted in the mounting shell, and the gas generator is communicated with the airbag body; the air bag body comprises a forward air bag and a lateral air bag, the lateral air bag is connected to one side of the forward air bag, and the forward air bag and the lateral air bag are of an L-shaped structure; limiting mechanisms are arranged in the forward air bag and the lateral air bags, unfolding of the air bags is controlled through the limiting mechanisms, front protection and side restraint of knees are achieved at the same time through the air bag body integrated structure, side protection blind areas are eliminated, the safety air bag is adaptive to various working conditions such as front collision, offset collision and oblique collision, and the protection performance of the safety air bag is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive safety equipment technology, and in particular to a knee airbag for protecting occupants. Background Technology

[0002] With the development of automotive safety technology, occupant knee airbags have become an important feature for improving the passive safety performance of vehicles. They are mainly used to cushion the impact on the knees and lower limbs of occupants during a vehicle collision, avoid lower limb collisions, and reduce the risk of injuries such as fractures.

[0003] Traditional knee airbags only protect the front of the occupant's knees. However, during a collision, the knees are also prone to shifting to the side and impacting the side of the center console, door trim panels, etc., causing injuries such as lateral ligament damage, lower leg fractures, and crush injuries. Existing knee airbags lack lateral restraint and cushioning structures, cannot effectively limit lateral displacement of the knees, have insufficient protection coverage, and have blind spots, resulting in inadequate safety protection performance of knee airbags. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a knee airbag to protect the occupant's knee, so as to solve the problem of insufficient coverage of existing knee airbags.

[0005] To achieve the above objectives, the present invention provides a knee airbag for occupants, comprising a mounting housing and an airbag body. The airbag body is disposed within the mounting housing, and a cover is mounted on the mounting housing. A gas generator is installed inside the mounting housing and is connected to the airbag body. The airbag body includes a frontal airbag and a side airbag, with the side airbag connected to one side of the frontal airbag. The frontal and side airbags are L-shaped. Limiting mechanisms are provided within both the frontal and side airbags to control the deployment of the airbags.

[0006] A further improvement is that the limiting mechanism includes pull straps disposed within the front airbag and the side airbag, with multiple pull straps arranged in a Y-shaped structure.

[0007] A further improvement is that an air inlet reinforcement plate is provided at the connection between the airbag body and the gas generator.

[0008] A further improvement is that the surface of the cover is provided with a pre-set tear door.

[0009] A further improvement is that the airbag body is provided with a vent hole.

[0010] The beneficial effects of this invention are as follows: By employing a frontal airbag and a lateral airbag assembly to form the airbag body, the frontal and lateral airbags form an L-shaped structure. The frontal airbag deploys forward to buffer and restrain the forward movement of the occupant's knees, while the lateral airbags deploy to the side to form a lateral enclosure structure, limiting the occupant's knees and lower legs from shifting outward. The integrated structure simultaneously achieves frontal protection and lateral restraint of the knees, eliminating blind spots in lateral protection. It is adaptable to various working conditions such as frontal collisions, offset collisions, and oblique collisions. Furthermore, the airbags inflate and deploy synchronously, ensuring consistent protection response without time lag, thus improving the safety performance of the knee airbag. A limiting mechanism is set inside the airbag body, which limits the deployment of the airbag body through a pull strap, controlling the deployment shape of the airbag body and making the airbag body more stable and effective. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this invention 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 invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the housing structure installed according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the housing in an embodiment of the present invention; Figure 3 This is a schematic diagram of the airbag body structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the forward airbag structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the lateral airbag structure according to an embodiment of the present invention.

[0013] The diagram is marked as follows: 1. Housing; 2. Airbag body; 3. Cover; 4. Gas generator; 5. Front airbag; 6. Side airbag; 7. Strap; 8. Inlet reinforcement plate; 9. Pre-set tear door; 10. Vent hole. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0015] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention 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.

[0016] like Figure 1-5 As shown, this embodiment provides a knee airbag for protecting occupants, including a mounting housing 1 and an airbag body 2. The folded airbag body 2 is housed in the mounting housing 1. A gas generator 4 is installed inside the mounting housing 1 and is connected to the airbag body 2, providing an air source for the airbag body 2. The mounting housing 1 is assembled to the lower end of the door panel, and a cover 3 is installed on the mounting housing 1. A preset tear door 9 is provided on the surface of the cover 3. When the airbag body 2 is inflated and deployed, it pops outward along the preset tear door 9.

[0017] The airbag body 2 includes a front airbag 5 and a side airbag 6. The side airbag 6 is connected to one side of the front airbag 5 and the side airbag 6 and the front airbag 5 are connected and form an integrated inflatable structure. The front airbag 5 and the side airbag 6 have an L-shaped structure. The front airbag 5 deploys forward to cushion and restrain the forward movement of the occupant's knees, and the side airbag 6 deploys to the side to form a lateral barrier structure to limit the occupant's knees and lower legs from shifting outward.

[0018] Both the frontal airbag 5 and the side airbag 6 are equipped with limiting mechanisms to control the deployment of the airbags. The limiting mechanisms include pull straps 7 installed in the frontal airbag 5 and the side airbag 6. There are multiple pull straps 7, which are arranged in a Y-shape. One pull strap 7 is connected to the bottom and middle of the airbag at both ends, and the two pull straps 7 are connected to the middle of the airbag from the left and right sides of the upper part of the airbag at an angle. The three pull straps 7 form a Y-shape structure. The frontal airbag 5 controls the deployment thickness and support stiffness of the airbag through the pull straps 7, and the side airbag 6 limits the lateral deployment width and height through the pull straps 7.

[0019] An air inlet reinforcing piece 8 is provided at the connection between the airbag body 2 and the gas generator 4 to increase strength and prevent tearing.

[0020] The airbag body 2 is equipped with a vent 10. When the occupant impacts the airbag body 2, the gas is released in a controlled manner through the vent 10 to achieve linear buffering and avoid secondary injury caused by rigid impact. At the same time, after the protection is completed, the pressure is quickly released, causing the airbag body 2 to collapse and not hinder the occupant from escaping.

[0021] When a vehicle collision occurs, the control system triggers the gas generator 4 to work, and gas is quickly inflated into the airbag body 2; the front airbag 5 deploys forward to cushion and restrain the forward movement of the occupant's knees; the side airbag 6 deploys to the side simultaneously to form a side barrier structure, which restricts the occupant's knees and lower legs from shifting outward, avoiding secondary impact with the vehicle's interior structure, and achieving all-round protection for the knees.

[0022] 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 the invention is limited to these examples; within the framework of the invention, 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 the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A knee airbag for protecting occupants, comprising a mounting housing (1) and an airbag body (2), characterized in that, The airbag body (2) is installed inside the mounting housing (1), and a cover (3) is installed on the mounting housing (1). A gas generator (4) is installed inside the mounting housing (1), and the gas generator (4) is connected to the airbag body (2). The airbag body (2) includes a front airbag (5) and a side airbag (6). The side airbag (6) is connected to one side of the front airbag (5). The front airbag (5) and the side airbag (6) are in an L-shaped structure. A limiting mechanism is provided inside both the front airbag (5) and the side airbag (6) to control the deployment of the airbag.

2. The knee airbag for protecting occupants according to claim 1, characterized in that, The limiting mechanism includes pull straps (7) installed in the front airbag (5) and the side airbag (6). There are multiple pull straps (7), which are distributed in a Y-shaped structure.

3. The knee airbag for protecting occupants according to claim 1, characterized in that, An air inlet reinforcing plate (8) is provided at the connection between the airbag body (2) and the gas generator (4).

4. The knee airbag for protecting occupants according to claim 1, characterized in that, The surface of the cover (3) is provided with a pre-set tear door (9).

5. The knee airbag for protecting occupants according to claim 1, characterized in that, The airbag body (2) is provided with a vent (10).

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