A side curtain airbag

Abstract

The embodiment of the present specification provides a side curtain, which comprises a gas bag, a gas generator and a bracket, the gas bag is provided with a connecting port matched with the gas generator, the gas outlet of the gas generator is inserted into the connecting port, and then is installed on the bracket, the side curtain further comprises an elastic member and a snap ring, a plurality of through holes are formed on the bracket, the elastic member passes through the through holes to wrap the gas generator, the gas bag and the bracket together for primary closing fastening, and the snap ring is tightly buckled outside the elastic member for secondary closing fastening. By setting the elastic member and the snap ring, and simultaneously forming the through holes on the bracket for the elastic member to pass through, the elastic member passes through the through holes to wrap the gas generator, the gas bag and the bracket together, and then the snap ring is buckled tightly to perform primary closing fastening and secondary closing fastening, so that the displacement displacement between the gas generator and the bracket can be avoided, and gas leakage can be avoided.

Description

Technical Field

[0001] This specification relates to the field of side curtain air technology, specifically to a side curtain air system. Background Technology

[0002] Side curtain airbags are used to protect the driver and passengers in side collisions. When a collision occurs, the collision signal detonates the gas generator, causing the side curtain airbag to inflate and deploy between the occupant and the door. In addition to protecting occupants in side collisions, side curtain airbags also need to protect them during rollovers. In these cases, the side curtain airbags require a certain pressure holding time, currently specified as 6 seconds. However, this is difficult to meet for side curtain airbags that deploy in tens of milliseconds. This is because after the airbag deploys, gas can easily leak through the needle holes in the seams. Furthermore, when the gas generator detonates, it can shift or loosen relative to the airbag's mounting opening, or widen the opening, causing gas leakage.

[0003] Currently, a strip is usually added at the installation port of the airbag to tie the installation port of the airbag to the bracket or vehicle body to prevent the side curtain airbag from moving around when it is deployed. A clamp is also used at the installation port of the gas generator to prevent the gas generator from leaking. However, the above methods are difficult to eliminate the movement and displacement between the gas generator and the bracket or vehicle body and the gas leakage when the gas generator is ignited. Summary of the Invention

[0004] In view of this, the embodiments of this specification provide a side air curtain, which, by setting an elastic element and a retaining ring, and by opening a through hole on the bracket for the elastic element to pass through, and by winding the gas generator, air bag and bracket together together through the through hole for primary tightening, can prevent the gas generator and bracket from shifting or displacing, thereby preventing gas leakage.

[0005] This specification provides the following technical solution in its embodiments: a side air curtain, the side air curtain including an air bag, a gas generator and a bracket, the air bag having a connection port that mates with the gas generator, the gas outlet of the gas generator being inserted into the connection port and then mounted on the bracket, the side air curtain also including an elastic element and a retaining ring, the bracket having several through holes, the elastic element passing through the through holes to wrap the gas generator, air bag and bracket together for primary tightening, the retaining ring being tightly clamped to the outside of the elastic element for secondary tightening.

[0006] Preferably, the through hole is an elongated through hole, and there are one, two or more through holes. The through holes are opened on the bottom surface, side surface or extension of the bracket corresponding to the position of the elastic element.

[0007] Preferably, when there is one through hole, one end of the elastic element is fixedly connected to the connection port, and the other end is a free end, which passes through the through hole and wraps around the connection port and the outside of the bracket.

[0008] Preferably, when there are two through holes, the elastic element is fixedly connected to the connection port, with two free ends at each end. The two free ends pass through the two through holes and are wrapped around the connection port and the outside of the bracket, with one free end covering the outside of the other free end.

[0009] Preferably, the first length of one of the free ends after passing through one of the through holes is the same as or different from the second length of the other free end after passing through the other through hole.

[0010] Preferably, the elastic element passes through the through hole, and the width from the connection point with the air bag to the through hole is a first width, and the width of the remaining portion of the elastic element after passing through the through hole to the free end of the elastic element is a second width, wherein the second width is not less than the first width.

[0011] Preferably, the first width is not greater than the length of the through hole;

[0012] And / or, the first width is not less than 1.5 times the width of the retaining ring;

[0013] And / or, the second width may gradually widen from the through hole to the free end, and the maximum width of the second width is not greater than twice the length of the through hole.

[0014] Preferably, the thickness of the free end is not greater than half the width of the through hole.

[0015] Preferably, the elastic element is one of the following: a rubber strip, a coated cloth sheet, silicone, a rubber band, a coated fabric, or leather.

[0016] Preferably, when the adhesive-coated cloth is wrapped around the connection port and the bracket of the air bag, one side of the adhesive-coated cloth is in close contact with the outside of the connection port and the bracket of the air bag, and the other side is in close contact with the inner ring surface of the retaining ring.

[0017] The coated fabric sheet is a single-layer fabric sheet coated with adhesive on both sides, or it is formed by pressing together multiple layers of fabric sheets coated with adhesive on both sides.

[0018] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0019] By incorporating elastic elements and retaining rings, and simultaneously creating through holes on the bracket for the elastic elements to pass through, the gas generator, gas bag, and bracket are wound together together for primary tightening by passing the elastic elements through the through holes. This ensures that the gas generator outlet, the gas bag connection, and the bracket are securely connected. Due to the presence of the through holes, the elastic elements will not separate from the bracket, thus preventing any shifting or displacement between the gas generator and the bracket. At the same time, the retaining rings provide secondary tightening to the outside of the elastic elements, preventing them from loosening and ensuring the effective fixation of the elastic elements between the bracket and the gas bag. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional view of one embodiment of the side curtain airbag provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the structure when the elastic element passes through the two through holes in the support of the side air curtain provided by the present invention;

[0023] Figure 3 This is a cross-sectional view of another embodiment of the side curtain airbag provided by the present invention. Detailed Implementation

[0024] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0025] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one 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 aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0029] In existing technologies, when side curtain airbags are inflated and deployed, the impact force when the gas generator ignites is relatively large, which often causes the gas generator to shift and loosen relative to the airbag connection port, or to widen the connection port of the airbag, resulting in gas leakage inside the airbag. Common solutions include adding a strip at the airbag installation port to bind the airbag installation port to the bracket or vehicle body to prevent the side curtain airbag from shifting during deployment. Clamps are also installed at the gas generator installation port to prevent gas leakage. However, these methods are insufficient to eliminate shifting and gas leakage between the gas generator and the bracket / vehicle body when the gas generator ignites.

[0030] After extensive and in-depth experiments, the inventors designed a side air curtain that can prevent displacement between the gas generator and the support, thereby preventing gas leakage.

[0031] The technical problem solved by this invention is to eliminate the displacement and gas leakage between the gas generator and the bracket and the vehicle body when the gas generator is ignited.

[0032] More specifically, the solution adopted in this invention includes: by setting an elastic element and a retaining ring, and simultaneously opening a through hole on the bracket for the elastic element to pass through, the gas generator, air bag and bracket are wound together together for primary tightening by passing the elastic element through the through hole, so that the gas outlet of the gas generator, the connection port of the air bag and the bracket are tightly fastened together. Due to the existence of the through hole, it can be ensured that the elastic element will not separate from the bracket, thereby avoiding the displacement between the gas generator and the bracket. At the same time, the retaining ring is used to perform secondary tightening on the outside of the elastic element, which can prevent the elastic element from loosening and ensure the fixing effect of the elastic element on the bracket and the air bag.

[0033] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0034] like Figures 1-3 As shown, a side curtain airbag includes an air bag 2, a gas generator 1, and a support 3. The air bag 2 has a connection port that mates with the gas generator 1. The outlet of the gas generator 1 is inserted into the connection port and then mounted on the support 3. By inserting the outlet of the gas generator 1 into the connection port of the air bag 2, the gas generated when the gas generator 1 is working enters the air bag 2 through the connection port, causing the air bag 2 to inflate and expand. The side curtain airbag also includes an elastic element 4 and a retaining ring 5. The support 3 has several through holes 7. 4. The gas generator 1, gas bag 2, and support 3 are wound together through the through hole 7 for primary tightening, so that the gas outlet of the gas generator 1, the connection port of the gas bag 2, and the support 3 are tightly fastened together. Due to the presence of the through hole 7, the elastic element 4 will not separate from the support 3, thereby preventing the gas generator 1 from shifting or displacing between the support 3 and the support 3. The retaining ring 5 is tightly clamped to the outside of the elastic element 4 for secondary tightening, which can prevent the elastic element 4 from loosening and ensure the fixing effect of the elastic element 4 on the support 3 and the gas bag 2.

[0035] It should be noted that the retaining ring 5 is fitted at the connection position between the connection port of the air bag 2 and the air outlet of the gas generator 1. The retaining ring 5 can tightly clamp the elastic element 4 to the connection port and the bracket 3. The retaining ring 5 is an elastic retaining ring 5 to ensure that the retaining ring 5 can fit tightly with the elastic element 4, ensuring the fixing effect and preventing the connection port from separating from the air outlet of the gas generator 1.

[0036] It should also be noted that the elastic element 4 is made of a wound elastic material to ensure that the elastic element 4 can be wound between the connection port and the bracket 3.

[0037] like Figure 2As shown, in some embodiments, the through hole 7 is an elongated through hole. There are one, two, or more through holes 7. The through holes 7 are opened on the bottom surface, side surface, or extension of the support 3 corresponding to the position of the elastic element 4. The number of through holes 7 can be set according to the actual situation. There can be one, two, or more, as long as the elastic element 4 can pass through the through hole 7 and be wrapped around the connection port and the support 3. At the same time, the position of the through hole 7 can also be set according to the actual situation. It is preferred to set the position of the through hole 7 in a position that is convenient for the elastic element 4 to pass through and to be wrapped around the connection port and the support 3. For example, the position of the through hole 7 can be set near the gas outlet of the gas generator 1 and the connection port of the gas bag 2.

[0038] It should be noted that in this embodiment, the through hole 7 is an elongated through hole 7, which facilitates the elastic element 4 to pass through the through hole 7 and ensures the contact area between the elastic element 4 and the through hole 7. In other embodiments, the through hole 7 can also be a circular hole or a through hole 7 of other shapes, which can be set according to the actual situation.

[0039] It should also be noted that the through hole 7 can be set on the extension of the bracket 3, which facilitates processing.

[0040] like Figure 3 As shown, in a preferred embodiment, when there is only one through hole 7, one end of the elastic element 4 is fixedly connected to the connection port, and the other end is a free end 6. The free end 6 passes through the through hole 7 and wraps around the connection port and the outside of the bracket 3. By opening a through hole 7 on the bracket 3, the free end 6 of the elastic element 4 passes through the through hole 7 and wraps around the connection port and the outside of the bracket 3, thereby making the gas outlet of the gas generator 1, the connection port of the gas bag 2 and the bracket 3 fastened together. The through hole 7 can limit the elastic element 4 and prevent the elastic element 4 from sliding too much along the height direction of the bracket 3, thereby preventing the elastic element 4 from separating from the bracket 3 and ensuring the fastening effect between the gas outlet, the connection port and the bracket 3.

[0041] It should be noted that the elastic element 4 can be fixed to the connection joint by sewing, by gluing, or by other methods. The choice can be made according to the actual situation, as long as the fixing effect between the elastic element 4 and the connection joint is guaranteed. This will not be elaborated in detail here.

[0042] It should also be noted that the length of the elastic element 4 can be set according to the actual situation. By changing the length of the elastic element 4, the number of turns of the elastic element 4 can be changed to ensure that the retaining ring 5 and the elastic element 4 are in close contact.

[0043] like Figures 1-2 As shown, in another preferred embodiment, when there are two through holes 7, the elastic element 4 is fixedly connected to the connection port, with two free ends 6 at each end. The two free ends 6 pass through the two through holes 7 and are wrapped around the connection port and the outside of the bracket 3, with one free end 6 covering the outside of the other free end 6. By setting two through holes 7, the two free ends 6 of the elastic element 4 pass through the two through holes 7 and are wrapped around the bracket 3 in clockwise and counterclockwise directions, respectively. This arrangement can increase the contact area between the elastic element 4 and the connection port, ensuring the fastening effect between the connection port and the air outlet. At the same time, due to the presence of two through holes 7, the fastening between the elastic element 4 and the bracket 3 can be further increased.

[0044] It should be noted that after the two free ends 6 of the elastic element 4 pass through the two through holes 7 respectively, they are wound in opposite directions. Finally, one free end 6 covers the outside of the other free end 6, so that the elastic element 4 is wound around the outer periphery of the bracket 3 at least once, ensuring that the elastic element 4 can fully contact the inner ring surface of the retaining ring 5, thereby ensuring the fixing effect of the retaining ring 5 on the elastic element 4, the bracket 3 and the connection port.

[0045] It should also be noted that in other preferred embodiments, the number of through holes 7 can also be set to three, four or other numbers depending on the actual situation, as long as the elastic element 4 can pass through the through hole 7 to fasten the connection port, the air outlet and the bracket 3 together. This will not be elaborated in detail here.

[0046] Furthermore, the first length of one of the free ends 6 after passing through one of the through holes 7 may be the same as or different from the second length of the other free end 6 after passing through another through hole 7. By connecting the different positions of the elastic element 4 between the air bags 2, the lengths of the two free ends 6 of the elastic element 4 can be changed. The lengths of the two free ends 6 of the elastic element 4 can be set according to the actual situation.

[0047] like Figure 2 As shown, in some embodiments, the elastic element 4 passes through the through hole 7, and the width from the connection point with the air bag 2 to the through hole 7 is a first width ( Figure 2 The width of the remaining portion of the elastic element 4 after passing through the through hole 7 to the free end 6 of the elastic element 4 is the second width (b). Figure 2 The width of the elastic element 4 (a) is not less than the width of the first width. By setting the width of the elastic element 4 wrapped around the outside of the connection port and the width of the elastic element 4 after passing through the through hole 7, since the elastic element 4 after passing through the through hole 7 is in contact with the retaining ring 5 after being wrapped, the width of this part of the elastic element 4 can be set to be larger, so as to avoid the retaining ring 5 from separating from the elastic element 4 when it slides.

[0048] like Figure 2 As shown, in some embodiments, the first width is not greater than the length of the through hole 7. By setting the first width to be no greater than the length of the through hole 7, it is ensured that the elastic element 4 inside the through hole 7 will not fold when the elastic element 4 is wound, so that the elastic element 4 can pass through the through hole 7 normally.

[0049] In some preferred embodiments, the first width is not less than 1.5 times the width of the retaining ring 5, and the width at the narrowest position of the elastic member 4 is not less than 1.5 times the width of the retaining ring 5, so as to ensure that the retaining ring 5 is within the effective range of the elastic member 4 and to avoid separation between the retaining ring 5 and the elastic member 4 due to slippage of the retaining ring 5 or the elastic member 4.

[0050] In other embodiments, the first width can also be between 1 and 1.5 times the width of the retaining ring 5, as long as the retaining ring 5 can be within the effective range of the elastic element 4, and can be set according to the actual situation.

[0051] like Figure 2 As shown, in some preferred embodiments, the second width can gradually widen from the through hole 7 to the free end 6, and the elastic member 4 gradually widens from the through hole 7 to the free end 6, which can ensure that the effective area of ​​the elastic member 4 after winding is large, and ensure that the retaining ring 5 and the elastic member 4 will not separate when the retaining ring 5 or the elastic member 4 slides slightly. The maximum width of the second width is not greater than twice the length of the through hole 7, ensuring that the elastic member 4 can pass through the through hole 7 after being folded once.

[0052] In other embodiments, the width of the second width may also be greater than twice the length of the through hole 7. In this case, it is only necessary to ensure that the elastic member 4 can pass through the through hole 7 after being folded. It can be set according to the actual situation. Since the elastic member 4 can pass through the through hole 7 after being folded once when the maximum width of the second width is not greater than twice the length of the through hole 7, the operation is more convenient. Therefore, in the preferred embodiment of this application, the maximum width of the elastic member 4 can be set to be no greater than twice the length of the through hole 7.

[0053] In some preferred embodiments, the thickness of the free end 6 is not greater than half the width of the through hole 7. By setting the thickness of the free end 6, when the thickness of the free end 6 is not greater than half the width of the through hole 7, it is ensured that the thickness of the elastic member 4 after being folded once can pass through the through hole 7. This allows the elastic member 4 to pass through the through hole 7 by folding when the width of the elastic member 4 is greater than the length of the through hole 7 (i.e., when the elastic member 4 needs to be folded to pass through the through hole 7).

[0054] In other embodiments, the thickness of the elastic element 4 may be slightly greater than half the width of the through hole 7. Since the elastic element 4 has a certain deformation capacity, when the thickness of the folded elastic element 4 is greater than the width of the through hole 7, the elastic element 4 is compressed when passing through the through hole 7, so that the elastic element 4 can still pass through the through hole 7.

[0055] In some embodiments, the elastic element 4 is one of the following: rubber strip, coated cloth sheet, silicone, rubber belt, coated fabric or leather. The material of the elastic element 4 can be selected according to the actual situation to ensure that the elastic element 4 has elasticity and high friction.

[0056] like Figure 1 and Figure 3 As shown, in some preferred embodiments, the elastic element 4 is an adhesive-coated cloth sheet. When the adhesive-coated cloth sheet is wrapped around the connection port of the air bag 2 and the bracket 3, one side of the adhesive-coated cloth sheet is tightly attached to the outside of the connection port of the air bag 2 and the bracket 3, and the other side is tightly attached to the inner ring surface of the retaining ring 5. When the adhesive-coated cloth sheet is used, since the adhesive-coated cloth sheet has a certain degree of adhesiveness, when the adhesive-coated cloth sheet is wrapped around the connection port and the bracket 3, the side of the adhesive-coated cloth sheet close to the connection port and the bracket 3 is tightly attached to the outside of the connection port and the bracket 3, which can further increase the tightness between the adhesive-coated cloth sheet and the connection port and the bracket 3. At the same time, when the retaining ring 5 is tightly clamped to the outside of the adhesive-coated cloth sheet, the other side of the adhesive-coated cloth sheet is tightly attached to the inner ring surface of the retaining ring 5, which can further increase the stability between the adhesive-coated cloth sheet and the retaining ring 5.

[0057] The coated fabric sheet is a single-layer fabric sheet coated with adhesive on both sides, or it can be formed by pressing together multiple layers of fabric sheets coated with adhesive on both sides. The coating fabric sheet can be selected based on the thickness of the single-layer coated fabric sheet, the size of the bracket 3, and the size of the retaining ring 5. When the thickness of the single-layer coated fabric sheet is sufficient, a single-layer coated fabric sheet can be used. When the single-layer coated fabric sheet is relatively thin, multiple single-layer fabric sheets can be coated with adhesive and pressed together to form a multi-layer coated fabric sheet for use to ensure the tightness between the retaining ring 5 and the coated fabric sheet.

[0058] The various embodiments in this specification can be referred to interchangeably for the same or similar parts. Each embodiment focuses on describing the differences from other embodiments. In particular, the method embodiments described later are relatively simple in description since they correspond to the system, and relevant parts can be referred to the descriptions in the system embodiments.

[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A side curtain air vent, the side curtain air vent comprising an air bag, a gas generator, and a support, wherein the air bag has a connection port that mates with the gas generator, the outlet of the gas generator is inserted into the connection port, and then mounted on the support, characterized in that, The side air curtain also includes an elastic element and a retaining ring, and the bracket has several through holes; The elastic element is at least partially clamped between the air bag and the bracket. The elastic element has a free end, which passes through the through hole and wraps around the connection port and the outside of the bracket to wrap the gas generator, air bag and bracket together for a first-stage tightening to prevent displacement between the gas generator and the bracket. The retaining ring is fastened to the outside of the elastic element for a secondary tightening.

2. The side curtain air vent according to claim 1, characterized in that, The through hole is an elongated through hole, and there may be one, two or more through holes. The through hole is opened on the bottom surface, side surface or extension of the bracket corresponding to the position of the elastic element.

3. The side curtain air vent according to claim 2, characterized in that, When there is one through hole, one end of the elastic element is fixedly connected to the connection port, and the other end is a free end. The free end passes through the through hole and wraps around the connection port and the outside of the bracket.

4. The side curtain air vent according to claim 2, characterized in that, When there are two through holes, the elastic element is fixedly connected to the connection port, with two free ends at each end. The two free ends pass through the two through holes and are wrapped around the connection port and the outside of the bracket, with one free end covering the outside of the other free end.

5. The side curtain air vent according to claim 4, characterized in that, The first length of one of the free ends after passing through one of the through holes is the same as or different from the second length of the other free end after passing through another through hole.

6. The side curtain air vent according to claim 3 or 4, characterized in that, The elastic element passes through the through hole, and the width from the connection point with the air bag to the through hole is the first width. The width of the remaining part of the elastic element after passing through the through hole to the free end of the elastic element is the second width, and the second width is not less than the first width.

7. The side curtain air vent according to claim 6, characterized in that, The first width is not greater than the length of the through hole; And / or, the first width is not less than 1.5 times the width of the retaining ring; And / or, the second width may gradually widen from the through hole to the free end, and the maximum width of the second width is not greater than twice the length of the through hole.

8. The side curtain air vent according to claim 7, characterized in that, The thickness of the free end is no greater than half the width of the through hole.

9. The side curtain airbag according to any one of claims 1-8, characterized in that, The elastic element is one of the following: rubber strip, coated cloth sheet, silicone, rubber belt, coated fabric or leather.

10. The side curtain air vent according to claim 9, characterized in that, When the adhesive-coated cloth is wrapped around the connection port and the bracket of the air bag, one side of the adhesive-coated cloth is in close contact with the outside of the connection port and the bracket of the air bag, and the other side is in close contact with the inner ring surface of the retaining ring. The coated fabric sheet is a single-layer fabric sheet coated with adhesive on both sides, or it is formed by pressing together multiple layers of fabric sheets coated with adhesive on both sides.

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