Vehicle airbag door connecting structure

Abstract

The utility model provides a vehicle air bag door connecting structure which comprises a supporting frame body, an air bag door and a flexible piece, wherein the supporting frame body is used for containing an air bag component and is in a concave shape, the air bag door covers an opening of the supporting frame body, and the flexible piece is connected between the air bag door and the supporting frame body. The flexible part comprises a first connecting section, a second connecting section, a free section and a transition section, wherein the free section extends from the first connecting section to the top plate and is kept in a gap between the air bag door and the top plate, and the transition section is embedded in the top plate of the supporting frame body so as to connect the free section and the second connecting section. The transition section has a first transition section that engages the free section and extends toward the airbag member. According to the vehicle air bag door connecting structure, due to the arrangement of the first transition section, the second transition section and the included angle between the first transition section and the free section, the flexible part is not prone to being torn when the air bag door is opened, the connecting strength of the air bag door and the supporting frame body is further improved, and therefore the use quality of a vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle safety airbags, in particular to a vehicle airbag door connection structure. Background Art

[0002] With the continuous development of the automobile and new energy vehicle industries, consumers are paying more and more attention to vehicle safety. As a passive safety protection system for vehicles, airbags are used in conjunction with seat belts to cushion the driver or passenger's body when the vehicle collides, preventing the driver or passenger from directly hitting the various components in the car, thereby protecting the people in the car and improving the safety of the vehicle.

[0003] Among them, the airbag at the co-pilot position is usually arranged in the instrument panel facing the co-pilot, and an airbag component frame and a support frame are arranged. The airbag is arranged in the support frame, and an airbag door is also arranged on the support frame. One side of the airbag door is softly connected to the support frame through a mesh. When the airbag pops out, the airbag door is pushed open by the airbag, so that the airbag pops out. Since the airbag needs to pop out quickly when a car collision occurs, the airbag has a large pop-up force, which can easily cause the mesh connected to the airbag door to tear when it pops out, causing the airbag door to fly into the car, endangering the health and safety of people in the car.

[0004] In the prior art, there are two ways to arrange the mesh: vertically and horizontally. One is to arrange the mesh vertically on the support frame. This arrangement method of the mesh can ensure that the mesh has good tear resistance, but it will occupy more vertical space of the instrument panel and is difficult to use on vehicles with limited space. The other arrangement method is to arrange the mesh horizontally on the top plate of the support frame. In this arrangement method, the requirements for the vertical space of the instrument panel can be reduced, but when the airbag door is opened, the mesh is easily torn due to the shear force, resulting in a poor connection between the airbag frame and the support frame. Utility Model Content

[0005] In view of this, the utility model aims to propose a vehicle airbag door connection structure, which can improve the connection strength between the airbag door and the supporting frame when the vertical space of the instrument panel is limited, thereby improving the use quality of the vehicle.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A vehicle airbag door connection structure includes a support frame that accommodates an airbag component and is in a "concave" shape, an airbag door that covers the open part of the support frame, and a flexible member connected between the airbag door and the support frame, the flexible member including: a first connection section fixedly connected to the airbag door; a second connection section fixedly connected to a top plate of the support frame; a free section extending from the first connection section toward the top plate and being tautly maintained in a gap between the airbag door and the top plate; a transition section embedded in the top plate of the support frame to connect the free section and the second connection section; the transition section includes a first transition section that connects to the free section and extends to the airbag component, and a second transition section that connects between the first transition section and the second connection section; the angle between the first transition section and the taut free section is an obtuse angle.

[0008] Furthermore, the second transition section includes a first connecting segment arranged at an obtuse angle to the second connecting segment.

[0009] Furthermore, the angle between the first connecting segment and the second connecting segment is greater than the angle between the first transition segment and the taut free segment.

[0010] Furthermore, the angle between the first connecting segment and the upper surface of the airbag component is 10° to 20°.

[0011] Furthermore, the second transition section includes a second connecting section connected between the first connecting section and the first transition section, and the second connecting section is arranged parallel to the upper surface of the airbag component.

[0012] Furthermore, the length of the second connecting segment is 3.5 mm to 4.5 mm.

[0013] Furthermore, the length of the first transition section is 10 mm to 20 mm.

[0014] Furthermore, the angle between the first transition section and the upper surface of the airbag component is 65° to 75°.

[0015] Furthermore, a mounting groove following the transition section is formed in the top plate, and the transition section is embedded in the mounting groove; and a plurality of reinforcing ribs spaced apart along the extension direction of the gap are provided on the top plate above the mounting groove.

[0016] Furthermore, the thickness of the reinforcing ribs at both ends of the gap extending direction is greater than the thickness of the reinforcing ribs located in the middle.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The vehicle airbag door connection structure described in the utility model reduces the occupation of the vertical space of the instrument panel by setting the angle between the first transition section and the free section, and at the same time makes it difficult for the flexible part to be torn due to the opening of the airbag door, further improves the connection strength between the airbag door and the supporting frame, thereby improving the use quality of the vehicle.

[0019] The second transition section includes a first connecting section that is arranged at an obtuse angle to the second connecting section. By setting the angle between the first connecting section and the second connecting section to be an obtuse angle, the portion of the top plate that follows the second transition section smoothly transitions with the top plate body, thereby reducing local stress concentration at that location and improving the structural strength of the top plate at that location.

[0020] The angle between the first connecting segment and the second connecting segment is greater than the angle between the first transition segment and the taut free segment, so that the first transition segment can be tilted upward, thereby improving the tensile and tear resistance of the flexible component when the airbag door pops out, thereby preventing the airbag door from falling off the support frame.

[0021] The angle between the first connecting segment and the upper surface of the airbag component is 10° to 20°, which can ensure the structural strength of the top plate portion of the conformal second transition segment and reduce the stress concentration of the flexible member and the top portion.

[0022] The second transition section includes a second connection section connected between the first connection section and the first transition section, and the second connection section is arranged parallel to the upper surface of the airbag component. Through the arrangement of the second connection section, the connection between the first transition section and the second transition section is smoothly transitioned, and the flexible member is prevented from being torn due to stress at the connection.

[0023] The length of the second connecting segment is 3.5 mm to 4.5 mm. The length setting allows a smooth transition between the top plate structure of the first transition segment and the second transition segment to ensure that the top plate at this location is unlikely to deform due to stress, thereby improving the structural strength of the top plate.

[0024] The length of the first transition section is 10 mm to 20 mm to ensure that there is sufficient connection length between the flexible member and the top plate, thereby improving the connection strength between the airbag door and the top plate.

[0025] The angle between the first transition section and the upper surface of the airbag component is 65° to 75°. When the airbag door is opened, the first transition section and the top plate structure of the first transition section can help disperse the force of the airbag door on the flexible part, thereby improving the tear resistance of the flexible part and ensuring the connection strength between the airbag door, the top plate and the support frame.

[0026] A mounting groove of the conformal transition section is formed in the top plate, and the transition section is embedded in the mounting groove. A plurality of reinforcing ribs are arranged at intervals along the extending direction of the gap on the top plate above the mounting groove. The arrangement of the mounting groove is conducive to reducing the material usage of the top structure constituting the conformal transition section, and the arrangement of the reinforcing ribs improves the structural strength of the mounting groove, thereby improving the structural strength of the top plate and the supporting frame.

[0027] The thickness of the reinforcing ribs at the two ends of the gap extending direction is greater than the thickness of the reinforcing ribs located in the middle, so as to strengthen the two ends of the installation groove, thereby improving the structural strength of the installation groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0029] Figure 1 It is a schematic diagram of the overall structure of the vehicle airbag door connection structure according to an embodiment of the utility model;

[0030] Figure 2 A top view of the vehicle airbag door connection structure according to an embodiment of the utility model;

[0031] Figure 3 For the utility model embodiment Figure 2 A cross-sectional view at the position indicated by AA;

[0032] Figure 4 For the utility model embodiment Figure 3 A magnified view of the position shown in A;

[0033] Figure 5 A bottom view of the vehicle airbag door connection structure according to an embodiment of the utility model;

[0034] Description of reference numerals:

[0035] 1. Support frame;

[0036] 101, top plate; 102, mounting groove; 103, reinforcing rib; 104, auxiliary reinforcing rib;

[0037] 2. Airbag door;

[0038] 3. Clearance;

[0039] 4. Flexible parts;

[0040] 401, first connecting section; 402, second connecting section; 403, free section; 404, first transition section; 405, second transition section;

[0041] 4051, first connection segment; 4052, second connection segment;

[0042] 5. Airbag components;

[0043] a. The length of the second connecting segment; b. The length of the first transition segment;

[0044] α, the angle between the first connecting segment and the upper surface of the airbag component; β, the angle between the first transition segment and the upper surface of the airbag component. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0046] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0048] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0049] This embodiment relates to a vehicle airbag door connection structure, such as Figure 1 , Figure 2 and Figure 3 As shown, the overall structure includes a support frame 1 that accommodates an airbag component 5 and is in a "concave" shape, an airbag door 2 that covers the open portion of the support frame 1, and a flexible member 4 connected between the airbag door 2 and the support frame 1. Specifically, the airbag door 2 is clamped in the open portion of the support frame 1, and the airbag door 2 and the top plate 101 of the support frame 1 form a curved surface, which is arranged inclined to one side.

[0050] Among them, the flexible member 4 includes: a first connecting section 401 fixedly connected to the airbag door 2, a second connecting section 402 fixedly connected to the top plate 101 of the support frame 1, a free section 403 extending from the first connecting section 401 toward the top plate 101 and tautly maintained in the gap 3 between the airbag door 2 and the top plate 101, and a transition section embedded in the top plate 101 of the support frame 1 to connect the free section 403 and the second connecting section 402.

[0051] The transition section comprises a first transition section 404 connected to the free section 403 and extending toward the airbag component 5, and a second transition section 405 connected between the first transition section 404 and the second connecting section 402; the angle between the first transition section 404 and the taut free section 403 is an obtuse angle, thereby forming an arrangement form in which the first transition section 404 is inclined upward.

[0052] The airbag component 5 is arranged below the support frame 1 and includes an airbag that can be ejected. It is understandable that when the vehicle collides, the airbag is rapidly inflated due to the activation of the gas generator, and the airbag pushes the airbag door 2 to open it, and rapidly ejects through the open portion of the support frame 1. Since the airbag is ejected rapidly, the airbag exerts a large force on the airbag door 2, and one side of the airbag door 2 is softly connected to the top plate 101 of the support frame 1 through the flexible member 4. Due to the opening of the airbag door 2, the free section 403 of the flexible member 4, especially the connection between the free section 403 and the first transition section 404, is subjected to an oblique upward pulling force, which is composed of two forces, the vertical force and the horizontal force.

[0053] Since the angle between the first transition section 404 and the taut free section 403 is an obtuse angle, the first transition section 404 is arranged to be inclined upward, so that the first transition section 404 is arranged along the direction of action of the above-mentioned tension to a certain extent, thereby facilitating the tension received by the free section 403 to be evenly dispersed to the first transition section 404, thereby effectively dispersing the tension received by the flexible member 4 to a certain extent, and preventing the flexible member 4 from being torn due to excessive stress in a specific direction.

[0054] At the same time, since the second connecting section 402 is fixedly connected to the top plate 101 of the supporting frame 1 , the vertical dimension of the supporting frame 1 is reduced, thereby reducing the requirement for the vertical installation space of the supporting frame 1 .

[0055] As described above, by setting the angle between the first transition section 404 and the free section 403, the vertical space occupied by the dashboard is reduced, and at the same time, the flexible part 4 is not easily torn due to the opening of the airbag door 2, further improving the connection strength between the airbag door 2 and the support frame 1, thereby improving the quality of vehicle use.

[0056] Based on the above overall introduction, specifically, the airbag door 2 and the support frame 1 of this embodiment are both made of plastic injection molding, and the flexible member 4 is embedded in the airbag door 2 and the support frame 1. The flexible member 4 is a fabric with mesh holes, that is, a mesh cloth. The mesh holes on the mesh cloth can allow parts of the airbag door 2 and the support frame 1 to penetrate into the mesh holes to fully connect the mesh cloth and the two, thereby improving the connection strength between the flexible member 4 and the airbag door 2 and the support frame 1. In specific implementation, the airbag component 5 is located below the support frame 1, and a connector for connecting to the vehicle dashboard is provided at the bottom of the support frame 1.

[0057] Since the first transition section 404 is arranged obliquely and extends toward the airbag component 5, in order to ensure that the airbag door 2 and the top plate 101 can form a smooth curved surface and ensure the strength of the part of the top plate 101 structure that follows the first transition section 404, the second transition section 405 of this embodiment includes a first connecting segment 4051 that is set at an obtuse angle with the second connecting segment 402, so that the first transition section 404 and the second transition section 405, as well as the part of the top plate 101 structure that follows the first transition section 404 and the second transition section 405, that is, the installation groove 102 described below, form a V-shaped angle structure. By setting the obtuse angle between the first connecting segment 4051 and the second connecting segment 402, the part of the top plate 101 that follows the first connecting segment 4051 and the second connecting segment 402 can be smoothly transitioned, reducing the local stress concentration at the part, preventing the structure of the installation groove 102 from being damaged due to the action of tension when the airbag door 2 is opened, thereby ensuring the structural strength of the top plate 101.

[0058] When the airbag door 2 is opened and the flexible member 4 is subjected to force, the above-mentioned V-shaped angle structure, that is, the mounting groove 102 described below, has a tendency to fold upward due to the action of the flexible member 4. If the angle between the first connecting segment 4051 and the second connecting segment 402 is smaller than the angle between the first transition segment 404 and the taut free segment 403, the stress is easily concentrated on the top plate 101 structure at the angle between the first connecting segment 4051 and the second connecting segment 4052, which can easily cause the above-mentioned V-shaped angle structure to fold upward and break, thereby causing the top plate 101 structure to be destroyed, and the airbag door 2 and the supporting frame 1 to fall off, causing injuries to the passengers in the vehicle. Therefore, in this embodiment, the angle between the first connecting segment 4051 and the second connecting segment 402 is greater than the angle between the first transition segment 404 and the taut free segment 403, so that the area of ​​the portion of the top plate 101 following the first connecting segment 4051 is larger, and the structure of the portion of the top plate 101 at the first connecting segment 4051 and the second connecting segment 4052 is relatively flat, which can prevent the top plate 101 from breaking due to stress concentration.

[0059] Specifically, Figure 3 , Figure 4As shown, the angle α between the first connecting segment 4051 and the upper surface of the airbag component 5 of this embodiment is 10°~20°, which can further facilitate the smooth transition of the part of the top plate 101 structure at the connection between the first connecting segment 4051 and the second connecting segment 4052, and reduce the stress concentration of the flexible member 4 and the top plate 101 at this location.

[0060] In order to prevent the stress from being concentrated at the connection between the first transition section 404 and the second transition section 405 due to the arrangement of the angle between the first transition section 404 and the second transition section 405, the second transition section 405 of the present embodiment further includes a second connection section 4052 connected between the first connection section 4051 and the first transition section 404. The second connection section 4052 is arranged parallel to the upper surface of the airbag component 5 so that the connection between the first transition section 404 and the second transition section 405 can be smoothly transitioned, so as to prevent the flexible member 4 from being torn due to stress at the connection, thereby improving the connection strength between the airbag door 2 and the support frame 1.

[0061] Furthermore, the length a of the second connecting segment 4052 of the present embodiment is 3.5 mm to 4.5 mm, and the length setting can make the structure of the top plate 101 of the first transition segment 404 and the second transition segment 405 transition smoothly, reduce stress concentration, and ensure that the top plate 101 at this location is not easily deformed due to force, thereby improving the structural strength of the top plate 101.

[0062] Since the first transition section 404 is attached to the top plate 101, the first transition section 404 can disperse the force it receives to the top plate 101, thereby preventing the first transition section 404, i.e., the flexible member 4 from being torn. It is understandable that when the length of the first transition section 404 is too short, the connection strength between the first transition section 404 and the top plate 101 is poor, and the first transition section 404 is easily separated from the top plate 101 when subjected to force. After the first transition section 404 is separated from the top plate 101, the first transition section 404 cannot separate the force it receives to the top plate 101, which easily causes the flexible member 4 to break. When the length of the first transition section 404 is too long, when the first transition section 404 extends toward the airbag component 5, it occupies additional accommodation space. Therefore, in order to ensure the connection strength between the first transition section 404 and the top plate 101 and avoid tearing of the flexible member 4, the length b of the first transition section 404 of the present embodiment is 10 mm to 20 mm, so that the first transition section 404 should have a suitable length, and there is a suitable fitting area between the first transition section 404 and the top plate 101 to avoid the first transition section 404 from being separated from the top plate 101, thereby improving the connection strength between the airbag door 2 and the support frame 1.

[0063] In order to further prevent the flexible member 4, especially the connection between the free section 403 and the first transition section 404, from being torn, the angle β between the first transition section 404 and the upper surface of the airbag member 5 in this embodiment is 65° to 75°. It can be understood that when the angle β is too large, the first transition section 404 is more inclined to the vertical arrangement form, so that when the first transition section 404 is subjected to a lateral force, it is easy for the top plate 101 to detach, and it is easy for the flexible member 4 to break at the intersection of the second connecting segment 4052 and the first transition section 404. When the angle β is too small, the first transition section 404 is more inclined to a horizontal arrangement. At this time, the free section 403 of the flexible member 4 is subjected to a vertical force and is easily broken due to shearing at the junction of the first transition section 404 and the free section 403. Therefore, by setting the angle β between the first transition section 404 and the upper surface of the airbag component 5 to 65°~75°, the first transition section 404 is inclined, thereby improving the tear resistance of the flexible member 4 and ensuring the connection strength between the airbag door 2 and the top plate 101 and the support frame 1.

[0064] In order to reduce the weight of the top plate 101, the structure of the top plate 101 is optimized, such as Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, a mounting groove 102 with a transition section is formed in the top plate 101, and the transition section is embedded in the mounting groove 102. The mounting groove 102 is formed into a V-shaped angle structure as described above. In a specific implementation, the thickness of the mounting groove 102 is 4 mm. At the same time, a plurality of reinforcing ribs 103 are arranged at intervals along the extension direction of the gap 3 on the top plate 101 above the mounting groove 102, thereby improving the structural strength of the mounting groove 102.

[0065] In order to further strengthen the structure of the installation groove 102 and prevent it from breaking, in this embodiment, the thickness of the reinforcing ribs 103 located at both ends of the gap 3 in the extension direction is greater than the thickness of the reinforcing ribs 103 located in the middle, so that the two ends of the installation groove 102 can be reinforced, thereby improving the structural strength of the installation groove 102, preventing the top plate 101 structure from being damaged due to force, and further improving the connection strength between the airbag door 2 and the top plate 101 and the support frame 1. In the specific implementation, the thickness of the reinforcing ribs 103 located at both ends of the gap 3 in the extension direction is 3.5mm, and three reinforcing ribs 103 are respectively provided at both ends of the gap 3 in the extension direction, and the thickness of the remaining reinforcing ribs 103 located in the middle is 3mm. At the same time, the inner side of the support frame 1 near the installation groove 102 is provided with auxiliary reinforcing ribs 104 arranged at intervals along the extension direction of the gap 3, the thickness of the auxiliary reinforcing ribs 104 is 4mm, and the interval between each auxiliary reinforcing rib 104 is 12mm, so as to further strengthen the structural strength of the installation groove 102.

[0066] In summary, the vehicle airbag door connection structure of the present embodiment reduces the occupation of the vertical space of the dashboard by setting the angle between the first transition section 404 and the free section 403, and at the same time makes the flexible part 4 less likely to be torn due to the opening of the airbag door 2, further improves the connection strength between the airbag door 2 and the support frame 1, thereby improving the use quality of the vehicle and having good practicality.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle airbag door connection structure, comprising a support frame (1) accommodating an airbag component (5) and forming a "concave" shape, an airbag door (2) covering the open portion of the support frame (1), and a flexible member (4) connected between the airbag door (2) and the support frame (1), characterized in that: The flexible member (4) comprises: A first connecting section (401) fixedly connected to the airbag door (2); A second connecting section (402) is fixedly connected to the top plate (101) of the supporting frame (1); A free section (403) extending from the first connecting section (401) toward the top plate (101) and being tautly maintained in a gap (3) between the airbag door (2) and the top plate (101); A transition section is embedded in the top plate (101) of the support frame (1) to connect the free section (403) and the second connecting section (402); the transition section comprises a first transition section (404) connected to the free section (403) and extending toward the airbag component (5), and a second transition section (405) connected between the first transition section (404) and the second connecting section (402); the angle between the first transition section (404) and the taut free section (403) is an obtuse angle.

2. The vehicle airbag door connection structure according to claim 1, characterized in that: The second transition section (405) includes a first connecting segment (4051) disposed at an obtuse angle to the second connecting section (402).

3. The vehicle airbag door connection structure according to claim 2, characterized in that: The angle between the first connecting segment (4051) and the second connecting segment (402) is greater than the angle between the first transition segment (404) and the taut free segment (403).

4. The vehicle airbag door connection structure according to claim 2, characterized in that: The angle (α) between the first connecting segment (4051) and the upper surface of the airbag component (5) is 10° to 20°.

5. The vehicle airbag door connection structure according to claim 2, characterized in that: The second transition section (405) includes a second connecting section (4052) connected between the first connecting section (4051) and the first transition section (404), and the second connecting section (4052) is arranged parallel to the upper surface of the airbag component (5).

6. The vehicle airbag door connection structure according to claim 5, characterized in that: The length (a) of the second connecting segment (4052) is 3.5 mm to 4.5 mm.

7. The vehicle airbag door connection structure according to claim 1, characterized in that: The length (b) of the first transition section (404) is 10 mm to 20 mm.

8. The vehicle airbag door connection structure according to claim 1, characterized in that: The included angle (β) between the first transition section (404) and the upper surface of the airbag component (5) is 65° to 75°.

9. The vehicle airbag door connection structure according to any one of claims 1 to 8, characterized in that: A mounting groove (102) conforming to the transition section is formed in the top plate (101), and the transition section is embedded in the mounting groove (102); and a plurality of reinforcing ribs (103) arranged at intervals along the extension direction of the gap (3) are provided on the top plate (101) above the mounting groove (102).

10. The vehicle airbag door connection structure according to claim 9, characterized in that: The thickness of the reinforcing ribs (103) located at both ends of the gap (3) in the extending direction is greater than the thickness of the reinforcing ribs (103) located in the middle.

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