Elastic cushion and airbag device

Abstract

The invention provides an elastic cushion piece and an air bag device, and belongs to the field of automobile air bags, the air bag device comprises an air bag, an air generator, a support, an annular piece and the elastic cushion piece, and the air bag device is installed on a frame on the side of an automobile body through the support; the gas generator is arranged in the mounting opening of the gas bag, is at least partially wrapped by the bracket, and is used for providing expansion gas for the gas bag; the annular piece surrounds the support, fastens the air bag to the air generator and allows the expansion air to enter the air bag. The elastic cushion piece comprises at least one cushion piece body, and the cushion piece body is used for eliminating a gap, caused by the fall between the upper surface of the support and the outer surface of the air bag, of the annular piece. According to the processing scheme, the problem of air leakage after the air bag is unfolded is effectively solved, and meanwhile the risk that the air bag is scratched by a sharp edge when the air bag is unfolded can be prevented.

Description

Technical Field

[0001] The invention relates to the field of automobile airbags, and in particular to an elastic cushion and an airbag device. Background Art

[0002] The side airbag of a car is an air curtain installed on both sides of the door canopy. It is a safety airbag that can protect the side and head of the occupants after a collision. Existing car side airbags need to be assembled with multiple parts during installation. Brackets and clamps are usually used to fix the columnar gas generator and the airbag. However, during the deployment of the airbag, the clamp is prone to loosening at the junction of the bracket and the airbag, resulting in insufficient pressure maintenance due to air leakage in the airbag, and thus failing to meet the 6s pressure maintenance requirement of the side airbag required by the regulations. In order to prevent the clamp from loosening, the current common method is to thin the edges of the bracket on both sides to achieve the solution of the clamp fastening the bracket and the airbag plug entrance into one as much as possible. However, there is a risk that the airbag will be scratched when the airbag is deployed at the thinned part of the bracket, and safety cannot be guaranteed in real time. In addition, the thinned part of the bracket is also very easy to deform, further reducing the safety of the airbag device. Summary of the invention

[0003] Therefore, in order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an elastic cushion and an airbag device, which can effectively solve the problem of air leakage after the airbag is deployed, and also prevent the risk of the airbag being cut by sharp edges when it is deployed.

[0004] In order to achieve the above-mentioned purpose, the present invention provides an elastic pad for use in an airbag device, wherein the airbag device includes an airbag, a gas generator, a bracket, a ring, and an elastic pad, wherein the bracket mounts the airbag device on a frame on the side of a vehicle body; the gas generator is loaded into a mounting port of the airbag and is at least partially surrounded by the bracket to provide inflation gas for the airbag; the ring surrounds the bracket and fastens the airbag to the gas generator, and allows the inflation gas to enter the airbag; the elastic pad includes at least one gasket body, which is used to eliminate the gap in the ring caused by the difference between the upper surface of the bracket and the outer surface of the airbag.

[0005] In one embodiment, the contact between the gasket body and the bracket, the air bag, and the annular member is surface contact.

[0006] In one embodiment, the gasket body and the gap are interference fit.

[0007] In one embodiment, the shape of the gasket body is a contoured shape that fits the gap.

[0008] In one embodiment, the elastic gasket includes two gasket bodies, which are respectively arranged on the two end sides of the bracket for fixing the gas generator. The two gasket bodies are connected by at least one connecting bridge, and the length of the connecting bridge is not less than the surface width of the bracket spanned by the two gasket bodies.

[0009] In one embodiment, the two gasket bodies are connected by two connecting bridges, and the two connecting bridges are symmetrically arranged on the sides of the gasket body.

[0010] In one of the embodiments, the gap between the two connecting bridges gradually shrinks upward from the main end of the gasket.

[0011] In one of the embodiments, the connecting bridge further has at least one first end seat capable of contacting a surface of the bracket.

[0012] In one of the embodiments, a clamping portion for limiting the movement of the annular member is further provided on the bottom surface of the first end seat.

[0013] In one of the embodiments, an extension portion is further provided on the upper end surface of the first end seat, and the extension portion extends outwardly in a vertical direction of the connecting bridge.

[0014] In one embodiment, the connecting bridge is made of elastic material.

[0015] In one of the embodiments, the middle portion of the gasket body is arranged as a slide groove, and limiting walls are symmetrically arranged on both sides of the slide groove.

[0016] In one of the embodiments, a barb is provided at the upper end of the limiting wall for preventing it from falling off.

[0017] In one embodiment, the upper end surface of the barb is a guide surface, and when the annular member is installed in cooperation with the gasket body, the annular member is introduced into the slide groove from the guide surface, and both sides of the annular member are blocked by the limiting walls.

[0018] In one embodiment, the lower end surface of the barb is parallel to the bottom surface of the slide groove.

[0019] In one of the embodiments, the roots of the limiting walls on both sides of the gasket body can extend outward to form an extension portion, and the extension portion contacts the stopper portion on the bracket that limits the annular member.

[0020] In one of the embodiments, the roots of both sides of the gasket body can extend outward to form extension parts, and the extension parts are in contact with the stopper parts on the bracket that limit the annular member.

[0021] An airbag device comprises an airbag, a gas generator, a bracket, a ring, and an elastic pad, wherein the bracket mounts the airbag device on a frame on the side of a vehicle body; the gas generator is loaded into the mounting opening of the airbag and is at least partially surrounded by the bracket to provide inflation gas for the airbag; the ring surrounds the bracket and secures the airbag to the gas generator and allows the inflation gas to enter the airbag; the elastic pad is used to eliminate the gap in the ring caused by the drop between the upper surface of the bracket and the outer surface of the airbag, wherein the elastic pad is the elastic pad mentioned above.

[0022] Compared with the prior art, the advantages of the present invention are: the gap at the junction of the bracket and the airbag is filled with an elastic cushion to prevent the clamp from loosening at the junction of the bracket and the airbag, which can not only effectively solve the problem of air leakage after the airbag is deployed, but also prevent the risk of being cut by sharp edges when the airbag is deployed, and achieve long-term pressure maintenance. In addition, the elastic cushion can be designed as a platform and mass-produced, with low cost, easy to promote, and applicable to all fastening methods of columnar gas generators and airbags, not limited to airbag devices such as side air curtains and distal airbags. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic structural diagram of an airbag device in one embodiment of the present invention;

[0025] Figure 2 yes Figure 1 AA-plane cross-section of the middle airbag device;

[0026] Figure 3 is a schematic structural diagram of an elastic pad in one embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of an elastic pad in another embodiment of the present invention;

[0028] Figure 5 is a schematic structural diagram of an elastic pad in another embodiment of the present invention;

[0029] Figure 6 is a schematic structural diagram of an elastic pad in another embodiment of the present invention;

[0030] Figure 7 is a partial structural schematic diagram of a bracket in another embodiment of the present invention;

[0031] Figure 8 is a schematic diagram of the positions of various cross sections of an airbag device in another embodiment of the present invention;

[0032] Fig. 9 yes Figure 8 AA-plane cross-section of the middle airbag device;

[0033] Fig.10 yes Figure 8 BB section of the middle elastic pad;

[0034] Fig.11 yes Figure 8 A schematic diagram of the structure of the elastic cushion;

[0035] Fig.12 yes Fig.11 CC section of the middle elastic pad;

[0036] Fig.13 is a partial structural schematic diagram of a bracket in another embodiment of the present invention;

[0037] Fig.14 is a partial structural schematic diagram of a bracket in another embodiment of the present invention;

[0038] Fig.15 is a schematic structural diagram of an elastic pad in another embodiment of the present invention;

[0039] Fig.16 It is a partial structural schematic diagram of an airbag device in another embodiment of the present invention. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0041] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0042] It should be noted that various aspects of the embodiments within the scope of protection of the present invention are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0043] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0044] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0045] like Figure 1 and Figure 3 As shown, an embodiment of the present application provides an airbag device 100 including an airbag 4, a gas generator 3, a bracket 2, a ring member 5 and an elastic pad 1.

[0046] The bracket 2 mounts the airbag device 100 on the frame on the vehicle body side. The bracket 2 can be formed by metal moving processing. The bracket 2 has an arc-shaped curved portion that fits the gas generator 3 and the airbag 4, and a mounting portion that fixes the arc-shaped curved surface on the vehicle body side. The arc-shaped curved portion and the mounting portion can be formed in one piece, or can be connected by a connecting portion. The connecting portion can be a structure such as solder or bolts. The arc-shaped curved portion only partially wraps the gas generator 3 and the airbag 4.

[0047] The gas generator 3 is installed in the installation opening of the airbag 4 and is at least partially surrounded by the bracket 2. The gas generator 3 is used to provide inflation gas for the airbag 4. The gas generator 3 can be fully or partially surrounded by the airbag 4. When the gas generator 3 is fully surrounded by the airbag 4, the gas generator 3 is indirectly surrounded by the arc-shaped curved portion of the bracket 2 through the airbag 4.

[0048] When the vehicle collides, the airbag 4 receives the inflated gas from the gas generator 3 and forms an air cushion at a sufficiently fast speed to absorb energy for occupant protection, thereby achieving the purpose of reducing and alleviating occupant casualties. The airbag can be wrapped around the outside of the gas generator 3 and rolled into a roll for storage; the airbag can also be folded and wrapped around the outside of the gas generator 3.

[0049] The ring 5 surrounds the support 2 and fastens the air bag 4 to the gas generator 3, and allows the inflation gas to enter the air bag 4. The ring 5 can be a circular ring; the ring 5 can also be a Figure 2 The one-piece clamp shown is a front-to-back staggered structure; the ring 5 may also be a split clamp, which can be fixed by snapping. When the ring 5 surrounds the bracket 2 and fastens the airbag 4 to the gas generator 3, in order to ensure the stability of the airbag device 100 when the airbag is inflated, the bracket has a predetermined thickness, so there is a drop between the upper surface of the bracket and the outer surface of the airbag, and the drop cannot be eliminated.

[0050] The elastic pad 1 is used to eliminate the gap between the annular member 5 due to the drop between the upper surface of the bracket and the outer surface of the airbag. The elastic pad 1 includes at least one gasket body 11, which is used to eliminate the gap between the annular member 5 due to the drop between the upper surface of the bracket and the outer surface of the airbag. Figure 2 As shown, the elastic gasket 1 comprises two gasket bodies 11 and a connecting bridge 12. The gasket bodies 11 can be made of materials such as rubber or plastic.

[0051] The contact portion of the inner side of the annular member 5 with the surface of the bracket 2 is the first contact surface, and the contact portion of the inner side of the annular member 5 with the surface of the airbag 4 is the second contact surface. The gasket body 11 is arranged in the space between the first contact surface and the second contact surface, which can eliminate the transition drop between the two contact surfaces. The gasket body 11 can be in surface contact with the first contact surface and the second contact surface, or in point contact. When the gasket body 11 can be in point contact with the first contact surface and the second contact surface, there are multiple contact points between the gasket body 11 and the first contact surface and the second contact surface to ensure that the gasket body 11 does not shift.

[0052] The above device fills the gap at the junction of the bracket and the airbag with an elastic pad to prevent the clamp from loosening at the junction of the bracket and the airbag, which can not only effectively solve the problem of air leakage after the airbag is deployed, but also prevent the risk of being cut by sharp edges when the airbag is deployed and achieve long-term pressure maintenance. In addition, the elastic pad can be designed as a platform and mass-produced, with low cost, easy to promote, and applicable to all fastening methods of columnar gas generators and airbags, not limited to airbag devices such as side air curtains and distal airbags.

[0053] In one embodiment, the contact between the gasket body and the bracket, the air bag, and the ring is surface contact. The surface of the bracket perpendicular to the air bag is the third contact surface, such as Figure 2 As shown, the gasket body 11 can contact the first contact surface, the second contact surface and the third contact surface at the same time, and all of them are surface contacts. At this time, the contact between the gasket body 11 and the bracket 2, the air bag 4, and the ring 5 is all surface contact.

[0054] The above arrangement can effectively prevent the gasket body from shifting.

[0055] In one embodiment, the gasket body and the gap are interference fit, so that the height difference between the upper surface of the bracket and the outer surface of the air bag can be completely eliminated. The thickest part of the gasket body can be no less than the thickness of the bracket itself.

[0056] In one embodiment, the shape of the gasket body is a contoured shape that fits the gap, which can improve the sealing ability of the elastic gasket to the gap while eliminating the drop between the upper surface of the bracket and the outer surface of the airbag.

[0057] like Figure 2 As shown, in one embodiment, the elastic gasket includes two gasket bodies 11, and the gasket bodies 11 are respectively arranged at the two end sides of the bracket 2 fixing the gas generator 3. Figure 3 As shown, the two gasket bodies are connected by at least one connecting bridge 12, and the length of the connecting bridge is not less than the surface width of the bracket spanned by the two gasket bodies. The width of the connecting bridge 12 may be no greater than the width of the gasket body 11. The shape of the connecting bridge may be an arc, a broken line, etc. The material of the connecting bridge 12 may be the same as or different from the material of the gasket body 11.

[0058] The above arrangement can realize the rapid installation of the airbag device.

[0059] like Figure 4 As shown, in one embodiment, the two gasket bodies are connected by two connecting bridges, and the two connecting bridges are symmetrically arranged on the sides of the gasket bodies. Compared with the design of one connecting bridge, this not only reduces the difficulty of installing the elastic gasket, but also prevents the ring member 5 from falling out of the elastic gasket.

[0060] like Figure 4 and Figure 5 As shown, in one embodiment, the gap between the two connecting bridges gradually shrinks from the end of the gasket body upward, which can further limit the annular member 5 from escaping from the elastic gasket. The distance between the two connecting bridges is the largest at the end side close to the gasket body 11, and then gradually tightens, and the distance between the middle sections of the two connecting bridges is smaller than the width of the gasket body 11.

[0061] like Figure 5As shown, in one embodiment, the connecting bridge 12 ′ further has at least one first end seat 121 ′ that can contact the surface of the bracket 2 . Fig. 9 The connecting bridge in it also has at least one first end seat 1c' that can contact the surface of the bracket. The above arrangement can not only realize the vertical limitation of the annular member 5, but also make the length of the connecting bridge redundant and can adapt to gas generators or brackets of different diameters. And with this arrangement, the connecting bridge and the gasket body are integrally formed, and there is no need to re-open the mold or change the design due to the change in the width of the bracket surface. The length of the connecting bridge can include all ranges from the basic bracket surface width to the bracket surface width required by different vehicle models. The number of first end seats can be designed according to needs. The more the number, the longer the redundant length of the connecting bridge and the wider the adaptation range. The shape of the first end seat can be any one of a cube, a cuboid, a prism, a pyramid, etc. As Figure 6 As shown, the first end seat is in the shape of a quadrangular pyramid.

[0062] like Figure 5 As shown, in one embodiment, a clamping portion 122' is also provided on the bottom surface of the first end seat to limit the movement of the annular member. The clamping portion 122' can be inserted into Figure 7 The holes on the bracket and the ring member are pressed against from the side to prevent the ring member from moving or misaligning. The spacing between the two connecting bridge clamping parts 122' is no greater than the width of the ring member. The clamping part 122' can be fully or partially inserted into the bracket. Figure 7 The clamping portion 122' is inserted into the hole on the bracket. Figure 7 The depth of the bracket can be within the range of 0.8 to 1.5 mm. The shape of the clamping portion 122' can be a three-dimensional shape such as a cylinder, a cuboid, or a cube.

[0063] like Figure 5 , Figure 8 , Fig.11 As shown, in one embodiment, an extension portion is further provided on the upper end surface of the first end seat, and the extension portion extends outwardly in a vertical direction of the connecting bridge. Figure 5 The extended portion 123' is used to facilitate the assembly of the airbag device.

[0064] like Figure 8 , Fig. 9 , Fig.11 As shown, the elastic gasket 1' comprises two gasket bodies 1a' and two connecting bridges 1d'. Each connecting bridge 1d' is provided with a first end seat 1c', and the bottom surface of the first end seat 1c' contacts the upper surface of the bracket 2. The gasket body 1a' and the connecting bridge 1d' are made of different materials. Fig. 9In the cross-sectional view, the shape of the connecting bridge 1d' is approximately "M" shaped. Since the connecting bridge is elastic, the peak of the "M" shaped connecting bridge can adapt to the different ranges of bracket surface width required by different models. When the bracket surface width is large, the two ends of the connecting bridge are stretched out and the "M" shape is short and fat; when the bracket surface width is small, the two ends of the connecting bridge have a small curvature and the "M" shape is tall and thin.

[0065] like Fig.10 As shown, the two first end seats 1c' are respectively in contact with the surface of the bracket 2. The gap between the two connecting bridges gradually shrinks upward from the upper surface of the ring member 5, further limiting the ring member 5 from escaping from the elastic cushion. The first end seat 1c' may not be in contact with the surface of the ring member 5. The ring member 5 is limited in movement by the two connecting bridges.

[0066] like Fig.11 As shown, in one embodiment, the first end seat 1c' is also provided with an extension portion, which extends outward in the vertical direction of the connecting bridge. The extension portion can be used for installation between the elastic pad and other components. The distance between the farthest points of the extension portions of the two connecting bridges is not greater than the width of the gasket body 1a'.

[0067] In one embodiment, the connecting bridge is made of elastic material. The connecting bridge 12 can be made of metal material with elastic deformation, or rubber or plastic material, or can be integrally formed with the gasket body 11. In some embodiments, the thickness of the connecting bridge 1d' (except the first end seat 1c') can be no greater than the thickness of the annular member.

[0068] like Fig.12 As shown, in one embodiment, the middle of the gasket body 1a' is set as a slide slot, and limit walls 1e are symmetrically set on both sides of the slide slot. The limit walls 1e are used to limit the left and right movement of the ring member 5 in the slide slot to prevent the ring member 5 from slipping out from the side.

[0069] like Fig.12 As shown, in one embodiment, the upper end of the limiting wall 1e is provided with a barb 1b' for preventing the ring 5 from falling out. The barb 1b' is used to limit the up and down movement of the ring 5 in the slide groove to prevent the ring 5 from falling out from the top.

[0070] like Fig.12 As shown, in one embodiment, the upper end surface of the barb 1b' is a guide surface. When the ring member and the gasket body are installed in cooperation, the ring member is guided into the chute from the guide surface, and the two sides of the ring member are blocked by the limiting walls. The guide surface helps to assemble the ring member and the elastic gasket. The lower end surface of the barb 1b' can be perpendicular to the side wall of the chute or form an acute angle with the side wall of the chute.

[0071] In one embodiment, the lower end surface of the barb 1b' is parallel to the bottom surface of the slide groove, further limiting the annular member 5 from slipping out from above.

[0072] like Fig.13 As shown, the bracket 2' is provided with a stopper 21' at the position where the annular member 5 is installed. The stopper 21' is used to limit the annular member and realize rapid positioning and assembly during installation.

[0073] like Fig.14 As shown, the bracket 2" is provided with a stopper 21" at the position where the ring member 5 is installed. The stopper 21" is used to limit the ring member and realize rapid positioning and assembly during installation. Fig.14 The stopper 21" and Fig.13 The difference between the stopper 21' and the stopper 21' is whether the stopper is arranged around the bracket. The stopper 21' cooperates with the annular member to realize the positioning of the annular member. Fig.13 The stopper 21' is formed as a concave surface, and the thickness of the annular member is not greater than the depth of the concave surface, which not only realizes the positioning of the annular member, but also prevents the annular member from vibrating left and right.

[0074] like Fig.15 As shown, in one embodiment, the elastic gasket 1" may include a gasket body, the middle portion of the gasket body is set as a slide groove, and limiting walls 1e' are symmetrically arranged on both sides of the slide groove. The upper end of the limiting wall 1e' is provided with a barb 1b" for preventing slippage. The roots of the limiting walls on both sides of a gasket body can extend outward to form an extension portion 1f', and the extension portion 1f' contacts the stop portion 21' of the limiting ring member on the bracket. The extension portion 1f' and the stop portion 21' may be an interference fit or only in contact. In some embodiments, the extension length of the extension portion 1f' may be in contact with and completely cover the stop portion 21'. The extension portion 1f' is used to assist installation.

[0075] like Fig.16 As shown, the bracket has a stopper. The elastic gasket includes two gasket bodies and two connecting bridges. In one embodiment, the roots of both sides of the gasket body can extend outward to form an extension part, and the extension part contacts the stopper of the limiting ring member on the bracket. The extension part can partially cover the stopper of the bracket.

[0076] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. An elastic cushion, used in an airbag device, characterized in that: The airbag device comprises an airbag, a gas generator, a bracket, a ring, and an elastic cushion. The bracket mounts the airbag device on a frame on the vehicle body side; The gas generator is installed in the installation opening of the air bag and is at least partially surrounded by the bracket to provide inflation gas for the air bag; The annular member surrounds the bracket and secures the air bag to the gas generator and allows the inflation gas to enter the air bag; The elastic pad includes at least one pad body, and the pad body is used to eliminate the gap of the annular member caused by the height difference between the upper surface of the bracket and the outer surface of the air bag.

2. The elastic pad according to claim 1, characterized in that: The contact between the gasket body and the bracket, the air bag and the annular member is surface contact.

3. The elastic pad according to claim 1, characterized in that: The gasket body and the gap are in interference fit.

4. The elastic pad according to claim 1, characterized in that: The shape of the gasket body is a contoured shape that fits the gap.

5. The elastic pad according to claim 1, characterized in that: The elastic pad includes two pad bodies, which are respectively arranged at two end sides of the bracket for fixing the gas generator. The two gasket bodies are connected by at least one connecting bridge, and the length of the connecting bridge is not less than the surface width of the bracket spanned by the two gasket bodies.

6. The elastic pad according to claim 5, characterized in that: The two gasket bodies are connected by two connecting bridges, and the two connecting bridges are symmetrically arranged on the sides of the gasket body.

7. The elastic pad according to claim 6, characterized in that: The gap between the two connecting bridges gradually shrinks upward from the main end of the gasket.

8. The elastic pad according to claim 6, characterized in that: The connecting bridge also has at least one first end seat that can contact the surface of the bracket.

9. The elastic pad according to claim 8, characterized in that: A clamping portion for limiting the movement of the annular member is also provided on the bottom surface of the first end seat.

10. The elastic pad according to claim 8, characterized in that: An extension portion is also provided on the upper end surface of the first end seat, and the extension portion extends outwardly along the vertical direction of the connecting bridge.

11. The elastic pad according to claim 5, characterized in that: The connecting bridge is made of elastic material.

12. The elastic pad according to any one of claims 1 to 11, characterized in that: The middle part of the gasket body is arranged as a slide groove, and limiting walls are symmetrically arranged on both sides of the slide groove.

13. The elastic pad according to claim 12, characterized in that: The upper end of the limiting wall is provided with a barb for preventing falling off.

14. The elastic pad according to claim 13, characterized in that: The upper end surface of the barb is a guide surface. When the annular member is installed in cooperation with the gasket body, the annular member is introduced into the slide groove from the guide surface, and two sides of the annular member are blocked by the limiting walls.

15. The elastic pad according to claim 13, characterized in that: The lower end surface of the barb is parallel to the bottom surface of the slide groove.

16. The elastic pad according to any one of claims 12 to 15, characterized in that: The roots of the limiting walls on both sides of the gasket body can extend outward to form an extension portion, and the extension portion contacts the stopper portion on the bracket that limits the annular member.

17. The elastic pad according to any one of claims 1 to 11, characterized in that: The roots on both sides of the gasket body can extend outward to form an extension portion, and the extension portion contacts the stopper portion on the bracket that limits the annular member.

18. An airbag device, characterized in that: Including airbags, gas generators, brackets, rings, elastic pads, The bracket mounts the airbag device on a frame on the vehicle body side; The gas generator is installed in the installation opening of the air bag and is at least partially surrounded by the bracket to provide inflation gas for the air bag; The annular member surrounds the bracket and secures the air bag to the gas generator and allows the inflation gas to enter the air bag; The elastic pad is used to eliminate the gap between the annular member and the outer surface of the air bag due to the height difference between the upper surface of the bracket and the outer surface of the air bag. Wherein, the elastic pad is the elastic pad according to any one of claims 1 to 17.

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