Knee airbag module and vehicle
By designing the rectangular airbag bag and the pull piece in the knee airbag module to form a U-shaped structure, the problem of the knee airbag being unable to protect the areas on both sides of the occupant's legs is solved, all-round protection for the occupant's legs is achieved, the risk of injury is reduced and the manufacturing process is simplified.
Patent Information
- Application Number
- CN202422834033.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-18
AI Technical Summary
Existing knee airbags cannot effectively protect the areas on both sides of the occupant's legs, and have complex structures and high manufacturing costs.
A knee airbag module is designed, including a rectangular airbag bag and a pull member. When inflated, the airbag bag forms a U-shaped structure through the action of the pull member, wrapping the front and left and right sides of the occupant's legs. The airbag bag is deployed using a shell and a gas generator.
It effectively prevents the passenger's legs from colliding with hard points inside the vehicle, reduces injuries to the calves and knees, has a simple structure, is suitable for different vehicle models, and reduces manufacturing costs.
Smart Images
Figure CN223314974U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of vehicles, and in particular, to a knee airbag module and a vehicle. Background Art
[0002] In a side collision, the deformation and intrusion of the vehicle's side panels can cause injury to occupants. While common airbag systems, such as side airbags and seat-mounted side airbags, effectively protect the occupants' heads, chests, abdomens, and hips, they neglect to protect the occupants' legs, thighs, and knees. In actual side collisions, the collision of the occupants' legs, thighs, and knees with themselves, or with the interior panels, dashboard, and other components, can cause serious injury.
[0003] Knee airbags are a key component of frontal passive safety systems. Conventional knee airbags deploy flat upon deployment, focusing on protecting the occupant from forward motion in frontal collisions. However, they cannot prevent collisions between the occupant's legs and side areas (such as door trim and the passenger instrument panel). A few specially designed knee airbags utilize a bag-shaped airbag to provide frontal and side leg protection, resulting in a complex airbag structure and high manufacturing costs. Utility Model Content
[0004] The present disclosure aims to provide a knee airbag module and a vehicle to solve the technical problems that the knee airbag cannot protect the areas on both sides of the occupant's legs and that the knee airbag has a complex structure and high manufacturing cost.
[0005] In order to achieve the above-mentioned objectives, the present disclosure provides a knee airbag module, comprising: a shell, fixedly connected to the interior of a vehicle compartment and arranged in front of the passenger's knees, and an airbag assembly, comprising: an airbag bag, which is constructed in a rectangular shape, and the airbag bag is folded and stored in the shell in an initial state, and can extend from the rear side of the shell to expand and unfold when in an inflated state; and a pulling member, which is arranged on the rear surface of the airbag bag, and the two opposite ends of the airbag bag in a horizontal direction are respectively provided with the pulling members, a first end of the pulling member is fixedly connected to the end of the airbag bag, a second end of the pulling member is horizontally offset relative to the first end toward the middle of the airbag bag, and is fixedly connected to the airbag bag, and the offset distance of the second end relative to the first end on the airbag bag is greater than the length of the pulling member, so as to pull and bend the end of the airbag bag backward and toward the middle of the airbag bag.
[0006] Optionally, the pulling member includes: a first pull rope fixedly connected to the upper edge of the airbag bag, and a second pull rope fixedly connected to the lower edge of the airbag bag.
[0007] Optionally, the first pull rope and the second pull rope are both belt-shaped structures with rectangular cross-sections.
[0008] Optionally, the width of the first draw rope and the second draw rope is 50 mm to 100 mm.
[0009] Optionally, both the first pull rope and the second pull rope are round rope structures with a circular cross-section.
[0010] Optionally, the pulling member is made of PA66 material or PET material.
[0011] Optionally, the housing is disposed below the instrument panel.
[0012] Optionally, in the initial state of the airbag bag, edges of two opposite ends of the airbag bag in the horizontal direction are tucked inwardly between the front side and the rear side of the airbag bag.
[0013] Optionally, the knee airbag module further includes a gas generator capable of inflating the airbag bag.
[0014] On the basis of the above technical solution, the present disclosure further provides a vehicle, comprising the knee airbag module in the above technical solution.
[0015] Through the above technical solution, in the knee airbag module provided by the present disclosure, the airbag is constructed in a rectangular shape, and a pulling member is respectively provided at two ends opposite to each other in the horizontal direction on the rear side of the airbag. The first end of the pulling member is fixedly connected to the first connecting position of the end of the airbag, and the second end is horizontally offset relative to the first end toward the middle of the airbag and fixedly connected to the second connecting position of the airbag. Since the distance between the first connecting position and the second connecting position is greater than the length of the pulling member, the first connecting position of the airbag is pulled by the pulling member. The portion between the first and second joint positions can be bent so that the end of the airbag is bent backward relative to the middle of the airbag, thereby forming a U-shaped structure in the inflated state to evenly wrap the front and left and right sides of the occupant's legs. This not only avoids impact from the front of the occupant's legs, but also stabilizes the posture of the legs during an impact, reduces the tendency to move to the sides, avoids collision hard points in the areas between the legs and the vehicle door and the legs and the auxiliary instrument panel, and effectively reduces calf and knee injuries caused by collision hard points. The knee airbag module provided by the present disclosure has a simple structure and is easy to manufacture and assemble. It only requires the combination of a flat rectangular single-chamber airbag and a pull member to form an airbag with a U-shaped structure in the inflated state, thereby protecting the front and left and right sides of the occupant's legs. In addition, the knee airbag module provided by the present disclosure is suitable for different vehicle models. By adjusting the horizontal offset distance of the second end of the pull member relative to the first end toward the middle of the airbag bag, the length of the bent portion of the airbag bag can be adjusted, thereby making the knee airbag module adaptable to different vehicle models.
[0016] Through the above technical solution, the vehicle provided by the present disclosure has the same technical effect as the knee airbag module in the above technical solution. In order to avoid unnecessary repetition, it will not be described here.
[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0019] Figure 1 is a schematic structural diagram of a knee airbag module in an inflated state according to a specific embodiment of the present disclosure;
[0020] Figure 2 is a schematic structural diagram of an airbag bag in a specific embodiment of the present disclosure;
[0021] Figure 3 yes Figure 2A schematic diagram of the structure of the air bag and the pulling member assembly;
[0022] Figure 4 is a schematic diagram of a knee airbag module installed in front of the main driver's seat in a vehicle compartment according to a specific embodiment of the present disclosure, wherein the airbag is in an initial state;
[0023] Figure 5 is a schematic diagram of a knee airbag module installed in front of the main driver's seat in a vehicle compartment according to a specific embodiment of the present disclosure, wherein the airbag is switching from an initial state to a deployed state;
[0024] Figure 6 yes Figure 5 Schematic top view of
[0025] Figure 7 is a schematic diagram of a knee airbag module installed in front of the main driver's seat in a vehicle compartment in a specific embodiment of the present disclosure, wherein the airbag is in a deployed state;
[0026] Figure 8 yes Figure 7 Schematic top view of .
[0027] Description of Reference Numerals
[0028] 100-Dashboard, 200-Sub-Dashboard, 300-Door,
[0029] 1- Shell,
[0030] 2- Gas generator,
[0031] 3-airbag assembly, 30-airbag bag, 301-first joining position, 302-second joining position, 31-pull member, 311-first end, 312-second end, 313-first pull rope, 314-second pull rope. DETAILED DESCRIPTION
[0032] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.
[0033] In this disclosure, unless otherwise specified, directional words such as "up, down, left, and right" generally refer to the up, down, left, and right of the knee airbag module when it is installed in the vehicle compartment in normal use. "Inside and outside" refer to the inside and outside relative to the contour of the corresponding component itself. "Front and back" refer to the front and back of the knee airbag module when it is installed in the vehicle compartment in normal use, that is, the side of the knee airbag module facing the front of the vehicle is the front, and the side facing the rear of the vehicle is the back. The terms "first", "second", etc. used in this disclosure are to distinguish one element from another and do not have order or importance. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.
[0034] According to a specific embodiment of the present disclosure, a knee airbag module is provided, referring to Figures 1 to 8 As shown, the knee airbag module includes a housing 1 and an airbag assembly 3 .
[0035] Among them, the shell 1 can be fixedly connected to the interior of the vehicle and can be arranged in front of the passenger's knees. The rear side of the shell 1 can be provided with an opening, or a structure with relatively weak strength, so that the following airbag bag 30 can rush out from the rear side of the shell 1 when inflated.
[0036] refer to Figures 1 to 3As shown, the airbag assembly 3 may include an airbag bag 30 and a pull member 31. The airbag bag 30 may be configured in a rectangular shape. For example, the airbag bag 30 itself may be a flat structure in the shape of a rectangle or square. When the airbag bag 30 is rectangular, its length direction may be parallel to the horizontal direction. The airbag bag 30 may be folded and stored in the housing 1 in an initial state, and may be extended from the rear side of the housing 1 to expand and deploy when inflated. The pulling member 31 can be arranged on the rear surface of the airbag bag 30, and the two ends of the airbag bag 30 opposite to each other in the horizontal direction can be respectively provided with pulling members 31, that is, the two ends of the rear side surface of the airbag bag 30 facing the rear of the vehicle opposite to each other in the horizontal direction can be respectively provided with pulling members 31, the first end 311 of the pulling member 31 can be fixedly connected to the one end connection position 301 of the end of the airbag bag 30, the second end 312 of the pulling member 31 can be horizontally offset toward the middle of the airbag bag 30 relative to the first end 311, and fixedly connected to the second connection position 302 of the airbag bag 30, the offset distance of the second end 312 relative to the first end 311 on the airbag bag 30 can be greater than the length of the pulling member 31, so as to pull and bend the end of the airbag bag 30 backward and toward the middle of the airbag bag 30. That is, when the airbag 30 is flat, the distance between the first and second engagement locations 301, 302 is greater than the length of the pull member 31. Consequently, when the first and second ends 311, 312 of the pull member 31 are fixedly connected to the first and second engagement locations 301, 302, respectively, the portion between the first and second engagement locations 301, 302 can bend under the action of the pull member 31, thereby forming a U-shaped structure when the airbag 30 is inflated. The bent portion of the airbag 30 forms a buffer layer between the passenger's legs and the auxiliary instrument panel 200 and the door 300, thereby shielding the passenger's legs from impact from the auxiliary instrument panel 200 and the door 300.
[0037] Through the above technical solution, in the knee airbag module provided by the present disclosure, the airbag 30 is constructed in a rectangular shape. Pulling members 31 are respectively provided at two horizontally opposite ends of the rear side surface of the airbag 30. The first end 311 of the pulling member 31 is fixedly connected to the first connecting position 301 at the end of the airbag 30. The second end 312 is horizontally offset relative to the first end 311 toward the middle of the airbag 30 and fixedly connected to the second connecting position 302 of the airbag 30. Since the distance between the first connecting position 301 and the second connecting position 302 is greater than the length of the pulling member 31, under the pulling action of the pulling member 31, The portion between the first and second joint locations 301 and 302 of the airbag bag 30 can be bent, causing the end of the airbag bag 30 to bend backward relative to the middle of the airbag bag 30 . This allows the airbag bag 30 to form a U-shaped structure when inflated, evenly wrapping the front and left and right sides of the occupant's legs. This not only protects against impact from the front of the occupant's legs, but also stabilizes the legs during an impact, reducing their tendency to move to the sides. This avoids hard points of impact between the legs and the door 300 and the front instrument panel 200 , effectively reducing calf and knee injuries caused by these hard points. The knee airbag module provided by the present disclosure has a simple structure and is easy to manufacture and assemble. Simply by combining a flat, rectangular single-chamber airbag bag with a pull member 31 , the airbag bag 30 can be formed into a U-shaped structure when inflated, thereby protecting the front and left and right sides of the occupant's legs. In addition, the knee airbag module provided by the present disclosure is suitable for different vehicle models. By adjusting the horizontal offset distance of the second end 312 of the pull member 31 relative to the first end 311 toward the middle of the airbag bag 30, the length of the bent portion of the airbag bag 30 can be adjusted, thereby making the knee airbag module adaptable to different vehicle models.
[0038] In order to improve the degree of wrapping of the occupant's legs by the airbag 30 in the inflated state, refer to Figures 1 to 3 As shown, the pulling member 31 may include a first pull rope 313 and a second pull rope 314. The first pull rope 313 can be fixedly connected to the upper edge of the airbag bag 30, and the second pull rope 314 can be fixedly connected to the lower edge of the airbag bag 30. In this way, the first pull rope 313 and the second pull rope 314 can respectively apply pulling force to the upper edge and the lower edge of the airbag bag 30, so that the bent part of the airbag bag 30 is evenly attached to the side of the occupant's legs from top to bottom, thereby improving the protection of the occupant's legs.
[0039] As a preferred embodiment of the present disclosure, the first pull rope 313 and the second pull rope 314 can both be a belt-like structure with a rectangular cross-section. Such a belt-like structure can not only save the space occupied by the airbag assembly 3, but also has sufficient strength to avoid the failure of the protection of the airbag bag 30 caused by the breakage of the first pull rope 313 and the second pull rope 314 when the airbag bag 30 is inflated.
[0040] Preferably, the width of the first and second drawstrings 313, 314 can be between 50 mm and 100 mm. If the width of the first and second drawstrings 313, 314 is less than 50 mm, the strength of the first and second drawstrings 313, 314 may be insufficient, leading to breakage and failure. If the width of the first and second drawstrings 313, 314 is greater than 100 mm, the airbag assembly 3 may occupy too much space, thereby increasing the volume of the housing 1.
[0041] As another embodiment of the present disclosure that is not shown, the first pull rope 313 and the second pull rope 314 may both be round rope structures with a circular cross-section.
[0042] In a specific embodiment of the present disclosure, the pulling member 31 can be made of PA66 material or PET material to ensure that the pulling member 31 has sufficient strength.
[0043] In addition, reference Figures 4 to 8 As shown, the shell 1 can be set under the instrument panel 100. When the airbag bag 30 is in the initial state, the entire knee airbag module is hidden on the inner side of the instrument panel 100. When the airbag bag 30 switches from the initial state to the inflated state, the airbag bag 30 can rush out from the rear side of the shell 1, then break through the instrument panel 100, and finally fill between the occupant's legs and the instrument panel 100, the door 300 and the auxiliary instrument panel 200, so as to protect the front and left and right sides of the occupant's legs.
[0044] In order to avoid incorrect deployment of the airbag bag 30, in the initial state of the airbag bag 30, the edges of the two opposite ends of the airbag bag 30 in the horizontal direction are tucked inward between the front side and the rear side of the airbag bag 30. This ensures that the airbag bag 30 will not bend between the legs of the occupant during deployment, thereby avoiding the occurrence of incorrect deployment.
[0045] In order to facilitate the inflation of the airbag 30, refer to Figure 1 as well as Figures 4 to 8As shown, the knee airbag module may further include a gas generator 2 disposed on the housing 1 , which is capable of inflating the airbag 30 . Specifically, the gas generator 2 may be communicatively connected to the vehicle ECU. When a collision occurs, the vehicle ECU issues a collision signal, thereby igniting the gas generator 2 . After ignition, the gas generator 2 generates gas to inflate the airbag 30 . The airbag 30 then transitions from an initial state to an inflated state, ultimately filling the space between the occupant's legs and the instrument panel 100 , the door 300 , and the passenger panel 200 .
[0046] On the basis of the above technical solution, the present disclosure further provides a vehicle, comprising the knee airbag module in the above technical solution.
[0047] Through the above technical solution, the vehicle provided by the present disclosure has the same technical effect as the knee airbag module in the above technical solution. In order to avoid unnecessary repetition, it will not be described here.
[0048] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.
[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0050] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A knee airbag module, characterized in that: include: The housing is fixedly connected to the interior of the vehicle compartment and is arranged in front of the passenger's knees, and Airbag assembly, including: an airbag bag having a rectangular structure, the airbag bag being folded and stored in the shell in an initial state, and being able to extend from the rear side of the shell and expand and unfold when inflated, and A pulling member is provided on the rear surface of the airbag bag, and the pulling members are respectively provided at the two ends of the airbag bag that are opposite to each other in the horizontal direction. The first end of the pulling member is fixedly connected to the end of the airbag bag, and the second end of the pulling member is horizontally offset toward the middle of the airbag bag relative to the first end and fixedly connected to the airbag bag. The offset distance of the second end on the airbag bag relative to the first end is greater than the length of the pulling member, so as to pull and bend the end of the airbag bag backward and toward the middle of the airbag bag.
2. The knee airbag module according to claim 1, characterized in that: The pulling member comprises: a first drawstring fixedly connected to the upper edge of the airbag, and The second drawstring is fixedly connected to the lower edge of the airbag.
3. The knee airbag module according to claim 2, characterized in that: The first drawstring and the second drawstring are both belt-shaped structures with rectangular cross-sections.
4. The knee airbag module according to claim 3, characterized in that: The width of the first drawstring and the second drawstring is 50 mm to 100 mm.
5. The knee airbag module according to claim 2, characterized in that: The first pull rope and the second pull rope are both round rope structures with a circular cross-section.
6. The knee airbag module according to claim 1, characterized in that: The pulling piece is made of PA66 material or PET material.
7. The knee airbag module according to claim 1, characterized in that: The housing is arranged below the instrument panel.
8. The knee airbag module according to claim 1, characterized in that: In the initial state of the airbag bag, edges of two opposite ends of the airbag bag in a horizontal direction are tucked inwardly between the front side and the rear side of the airbag bag.
9. The knee airbag module according to claim 1, characterized in that: The knee airbag module also includes a gas generator capable of inflating the airbag bag.
10. A vehicle, characterized in that: A knee airbag module comprising the knee airbag module according to any one of claims 1 to 9.