Curtain airbag
By designing a combination of guides and pull straps in the curtain airbag, the ideal trajectory control of the airbag during the deployment process is achieved, and the problem of inability to effectively face the vehicle in the middle of the deployment in the prior art is solved, and safety performance is improved.
Patent Information
- Application Number
- CN202422252260.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The existing curtain airbags are difficult to achieve the ideal deployment trajectory during the deployment process, especially when they cannot be effectively deployed toward the vehicle during the deployment period, which may cause the airbag to hit the human head and cause damage.
A curtain-type airbag including an air bag, a pull belt and a guide member is designed. One end of the air bag is fixed to the body, and the pull belt and the middle of the outer side of the air bag are fixed. The guide guides the air bag to be unfolded towards the vehicle in the early stage of deployment, and the pull belt pulls the air bag to be unfolded towards the vehicle in the middle stage of deployment.
Through the cooperation of the guide and the pull belt, the air bag first faces inside the car and then outside the car during the deployment process, ensuring that the air bag is deployed to the narrow space between the passenger and the car window, avoiding impact on the human head, and improving safety performance.
Smart Images
Figure CN223030939U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of airbags, in particular to a curtain airbag. Background Art
[0002] The curtain airbag of an automobile, also known as a side curtain airbag or a curtain airbag (CAB), is an important passive safety device for automobiles, mainly used to protect the head safety of vehicle occupants during a side collision of the vehicle. The curtain airbag is installed on the top of the vehicle. When a side collision occurs to the vehicle, it will quickly inflate and deploy, covering the window, thereby preventing the occupants' heads from directly hitting hard objects inside the vehicle or flying debris outside the vehicle, effectively reducing head injuries.
[0003] During the deployment process of the existing curtain airbags, it is necessary to control the deployment trajectory of the airbag. The ideal deployment trajectory is that the airbag first deploys towards the inside of the vehicle and then towards the outside of the vehicle. However, it is very difficult for traditional curtain airbags to achieve the ideal deployment trajectory. The existing method is to control the deployment trajectory by designing different folding methods of the airbag. However, this method is effective in the early stage of deployment (0ms - 5ms), but the key to controlling the deployment trajectory is to further control it in the middle stage of deployment (15ms - 30ms). If the airbag cannot deploy towards the outside of the vehicle in the middle stage of the deployment trajectory, it will cause the airbag to hit the heads of the occupants, causing harm to the human body.
[0004] Therefore, it is necessary to design a curtain airbag with a more ideal deployment trajectory. Summary of the Utility Model
[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a curtain airbag with a more ideal deployment trajectory.
[0006] The technical solution of the utility model provides a curtain airbag, including an airbag. One end of the airbag is fixedly connected to the vehicle body. It also includes a pull belt and a guide member. One end of the guide member is fixedly connected to the vehicle body. One end of the pull belt is fixed on the guide member, and the other end is fixedly connected to the middle part of the outer side of the airbag.
[0007] Before the airbag deploys, the airbag and the pull belt are folded together.
[0008] After the airbag is inflated, in the early stage of deployment, the guide member guides the airbag to deploy towards the inside of the vehicle.
[0009] In the middle stage of deployment, the pull belt pulls the airbag to deploy towards the outside of the vehicle.
[0010] Furthermore, both the guide member and the airbag are fixedly connected to the vehicle body at the same position.
[0011] Further, the drawstring is an elastic band. In the early stage of deployment, the drawstring moves towards the interior of the vehicle together with the airbag and is stretched.
[0012] Further, the guiding member is a plate member with an L-shaped cross-section. The guiding member includes a fixing plate and a guiding plate. The fixing plate is fixedly connected to the vehicle body, and the guiding plate extends towards the interior of the vehicle after being bent relative to the fixing plate.
[0013] Further, the drawstring is fixedly connected to the guiding plate.
[0014] Further, mounting holes are formed in the guiding plate, and the drawstring is connected to the mounting holes through second connectors and gaskets.
[0015] Further, the mounting holes include through holes and clamping holes. The diameter of the through holes is larger than that of the clamping holes. The through holes communicate with the clamping holes. A clamping opening is provided between the through holes and the clamping holes. The width of the clamping opening is smaller than the diameter of the clamping holes. The diameter of the second connectors is equal to the diameter of the clamping holes.
[0016] Further, before the airbag is deployed, the airbag and the drawstring are wound and folded from the outside towards the inside.
[0017] Further, the drawstring is connected to the dead zone of the airbag.
[0018] Further, the guiding member is made of metal.
[0019] After adopting the above technical solution, the following beneficial effects are achieved:
[0020] By providing the guiding member and the drawstring, the present utility model guides the airbag to first deploy towards the interior of the vehicle and then towards the exterior of the vehicle during the deployment process. Finally, the airbag is deployed into the narrow space between the passenger and the window to protect the head and upper body of the passenger. Since the drawstring pulls the airbag towards the exterior of the vehicle in the middle stage of the airbag deployment, the impact on the human head during the airbag deployment is avoided, and the safety performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Referring to the accompanying drawings, the disclosure of the present utility model will become more understandable. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings:
[0022] Figure 1 is a schematic diagram of the curtain airbag after deployment in an embodiment of the present utility model;
[0023] Figure 2 is a schematic diagram of the curtain airbag before deployment in an embodiment of the present utility model;
[0024] Figure 3 is Figure 1 a partial schematic view of
[0025] Figure 4 is Figure 3 a side view of
[0026] Figure 5 is a view showing the usage state in the middle stage of the deployment of a curtain airbag in an embodiment of the present utility model;
[0027] Figure 6 is a schematic structural view of a guide member in an embodiment of the present utility model;
[0028] Figure 7 is a schematic view after the installation of the guide member and the pull belt in an embodiment of the present utility model;
[0029] Figure 8 is a partial structural schematic view of a pull belt in an embodiment of the present utility model.
[0030] List of reference numerals:
[0031] Airbag 1: connecting ear 11;
[0032] Pull belt 2;
[0033] Guide member 3: fixing plate 31, guide plate 32, mounting hole 33, connecting hole 34, through hole 331, clamping hole 332, bayonet 333;
[0034] First connecting member 4, second connecting member 5, gasket 6;
[0035] Vehicle body 10, interior trim panel 20. Detailed implementation manners
[0036] The following further illustrates the detailed implementation manners of the present utility model with reference to the accompanying drawings.
[0037] It is easy to understand that according to the technical solution of the present utility model, under the condition of not changing the essence of the present utility model, there are various structural ways and implementation ways that can be mutually replaced by those of ordinary skill in the art. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as all of the present utility model or as a limitation or restriction on the technical solution of the utility model.
[0038] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts, and therefore may change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.
[0039] In some embodiments of the present utility model, such as Figure 1 - Figure 2 shown, the curtain airbag includes an airbag 1, one end of the airbag 1 is fixedly connected to the vehicle body 10, and further includes a pull belt 2 and a guide member 3. One end of the guide member 3 is fixedly connected to the vehicle body, one end of the pull belt 2 is fixed on the guide member 3, and the other end is fixedly connected to the middle of the outer side surface of the airbag 1;
[0040] Before the airbag 1 is deployed, the airbag 1 and the pull belt 2 are folded together;
[0041] After the airbag 1 is inflated and in the early stage of deployment, the guide member 3 guides the airbag 1 to deploy towards the interior of the vehicle;
[0042] In the middle stage of deployment, the pull belt 2 pulls the airbag 1 to deploy towards the outside of the vehicle.
[0043] Specifically, as Figure 1 shown, the airbag 1 is a curtain airbag, and the airbag 1 is installed along the length direction of the roof of the vehicle body 10 or the side surface of the vehicle body along the window. When the airbag 1 is deployed, the airbag 1 extends between the window and the passenger, and is used to protect the head and upper body of the passenger and reduce the harm caused by side collisions to the human body.
[0044] Among them, as Figure 1 shown, a plurality of connecting ears 11 are provided on the upper side edge of the airbag 1, and connecting holes are provided on the connecting ears 11. As Figure 2 shown, the first connecting member 4 passes through the connecting ears 11 to fixedly connect the airbag 1 to the vehicle body 10.
[0045] As Figure 1 - Figure 2 shown, one end of the pull belt 2 is fixedly connected to the middle of the outer side surface of the airbag 1, and the other end is fixedly connected to the guide member 3 through a second connecting member 5. The length of the pull belt 2 is less than the length of the airbag 1.
[0046] As Figure 2 shown, the upper end of the guide member 3 is fixedly connected to the connecting ears 11 and the vehicle body 10 through the first connecting member 4, and the lower end of the guide member 3 extends towards the interior of the vehicle.
[0047] Among them Figure 2 is a state diagram of the airbag 1 and the pull belt 2 folded together, Figure 3 - Figure 4 is a state diagram after the airbag 1 and the pull belt 2 are deployed.
[0048] As Figure 2 shown, when the airbag 1 and the webbing 2 are folded, they are hidden behind the interior trim panel 20 and are located in the space between the vehicle body 10 and the interior trim panel 20.
[0049] As Figure 5 shown, when the vehicle is subjected to a side collision, the gas generator (not shown in the figure) is detonated, the airbag 1 is inflated and deployed, and the interior trim panel 20 is pushed open during the deployment process of the airbag 1.
[0050] Since the drawstring 2 is fixedly connected to the middle of the outer side of the airbag 1. In the early stage of the deployment of the airbag 1, the drawstring 2 does not restrict the deployment of the airbag 1, and the airbag 1 is deployed towards the vehicle interior under the action of the guiding member 3. As Figure 5 shown, when the drawstring 2 is tightened after the airbag 1 is deployed, the drawstring 2 begins to restrict the deployment direction of the airbag 1 and pulls the airbag 1 towards the vehicle exterior, so that the airbag 1 can extend into the space between the passenger and the window during the middle stage of deployment, preventing the airbag 1 from always deploying towards the vehicle interior during the deployment process and hitting the passenger's head, thereby increasing the safety performance.
[0051] Furthermore, as Figure 2 shown, both the guiding member 3 and the airbag 1 are fixedly connected to the vehicle body 10 at the same position. The upper end of the guiding member 3 and the upper side edge of the airbag 1 are both fixedly connected to the vehicle body 10 through the first connecting member 4. The first connecting member 4 can be a bolt or a screw.
[0052] Preferably, the drawstring 2 is an elastic band. In the early stage of deployment, the drawstring 2 moves towards the vehicle interior together with the airbag 1 and is stretched. When the drawstring 2 is tightened, the elastic force of the drawstring 2 pulls the airbag 1 to deploy towards the vehicle exterior.
[0053] Furthermore, as Figure 6 - Figure 7 shown, the guiding member 3 is a plate member with an L-shaped cross-section. The guiding member 3 includes a fixing plate 31 and a guiding plate 32. The fixing plate 31 is fixedly connected to the vehicle body 10, and the guiding plate 32 extends towards the vehicle interior after being bent relative to the fixing plate 31.
[0054] Specifically, a connection hole 34 is formed on the fixing plate 31, and the first connecting member 4 passes through the connection hole 34 to be connected to the fixing cover plate 31. The fixing plate 31 is generally arranged along the Z-direction of the vehicle body.
[0055] The guiding plate 32 is bent towards the vehicle interior relative to the fixing plate 31 to form a slope surface, and this slope surface can guide the airbag 1 to deploy towards the vehicle interior.
[0056] Furthermore, as Figure 7 shown, the drawstring 2 is fixedly connected to the guiding plate 32, and the guiding plate 32 also serves to connect the drawstring 2.
[0057] Furthermore, as Figure 6 shown, an installation hole 33 is formed on the guiding plate 32, and the drawstring 2 is connected to the installation hole 33 through the second connecting member 5 and the gasket 6.
[0058] Furthermore, as Figure 6As shown, the mounting hole 33 includes a through hole 331 and a clamping hole 332. The diameter of the through hole 331 is greater than that of the clamping hole 332. The through hole 331 communicates with the clamping hole 332. A clamping opening 333 is provided between the through hole 331 and the clamping hole 332. The width of the clamping opening 333 is less than the diameter of the clamping hole 332. The diameter of the second connecting member 5 is equal to the diameter of the clamping hole 332.
[0059] During installation, as Figure 8 shown, the second connecting member 5 is first fixedly connected to the gasket 6 and the pull belt 2. Since the diameter of the through hole 331 is greater than the diameter of the second connecting member 5, the second connecting member 5 can penetrate into the through hole 331. Then, the pull belt 2 is pulled, so that the second connecting member 5 squeezes through the clamping opening 333 and enters the clamping hole 332. Since the diameter of the second connecting member 5 is equal to the diameter of the clamping hole 332, the second connecting member 5 is in interference fit with the clamping hole 332, realizing the fixed connection between the pull belt 2 and the guide member 3.
[0060] Preferably, the second connecting member 5 can be a rivet.
[0061] Furthermore, as Figure 2 shown, before the airbag 1 is deployed, the airbag 1 and the pull belt 2 are wound and folded from the outside to the inside.
[0062] Optionally, the airbag 1 and the pull belt 2 can also be wound and folded from the inside to the outside, or folded in a Z shape.
[0063] Preferably, the pull belt 2 is connected to the dead zone of the airbag 1. Here, the "dead zone" refers to the non-inflatable area on the airbag 1. When the pull belt 2 is connected to the non-inflatable area, air leakage of the airbag 1 is avoided. If the pull belt 2 is connected to the inflatable area of the airbag 1, during the process of pulling the airbag 1, pinholes may cause air leakage or tearing of the airbag 1.
[0064] Preferably, the pull belt 2 is made of the same material as the airbag 1, such as PET or PA66. The pull belt 2 does not require a coating and can withstand a certain pulling force, playing a role in tensioning the airbag 1.
[0065] Preferably, the guide member 3 is made of metal. Optionally, the guide member 3 can also be made of other materials with a certain structural strength.
[0066] By providing the guide member and the pull belt, the present utility model guides the airbag to first deploy towards the interior of the vehicle and then towards the exterior of the vehicle during the deployment process. Finally, the airbag is deployed into the narrow space between the passenger and the window, for protecting the head and upper body of the passenger. Since the pull belt pulls the airbag towards the exterior of the vehicle during the middle stage of the airbag deployment, impact on the human head during the airbag deployment process is avoided, increasing the safety performance.
[0067] The above are only the principles and preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, based on the principles of the present utility model, several other variations can also be made, which should also be regarded as the protection scope of the present utility model.
Claims
1. A curtain airbag, comprising an airbag, one end of which is fixedly connected to a vehicle body, characterized in that: It also includes a drawstring and a guide member, one end of the guide member is fixedly connected to the vehicle body, one end of the drawstring is fixed to the guide member, and the other end is fixedly connected to the middle part of the outer side surface of the airbag; Before the air bag is deployed, the air bag and the drawstring are folded together; After the airbag is inflated, in the early stage of deployment, the guide member guides the airbag to deploy toward the inside of the vehicle; In the middle stage of deployment, the drawstring pulls the airbag to deploy toward the outside of the vehicle.
2. The curtain airbag according to claim 1, characterized in that: The guide member and the air bag are both fixed at the same position with the vehicle body.
3. The curtain airbag according to claim 1, characterized in that: The drawstring is an elastic belt. In the early stage of deployment, the drawstring moves toward the inside of the vehicle together with the airbag and is stretched.
4. The curtain airbag according to claim 1, characterized in that: The guide member is a plate member with an L-shaped cross section, and comprises a fixed plate and a guide plate. The fixed plate is fixedly connected to the vehicle body, and the guide plate is bent relative to the fixed plate and extends toward the inside of the vehicle.
5. The curtain airbag according to claim 4, characterized in that: The drawstring is fixedly connected to the guide plate.
6. The curtain airbag according to claim 5, characterized in that: The guide plate is provided with a mounting hole, and the drawstring is connected to the mounting hole via a second connecting member and a gasket.
7. The curtain airbag according to claim 6, characterized in that: The mounting hole includes a through hole and a clamping hole, the diameter of the through hole is larger than the diameter of the clamping hole, the through hole is connected to the clamping hole, a clamping mouth is provided between the through hole and the clamping hole, the width of the clamping mouth is smaller than the diameter of the clamping hole, and the diameter of the second connecting piece is equal to the diameter of the clamping hole.
8. The curtain airbag according to claim 1, characterized in that: Before the air bag is deployed, the air bag and the drawstring are rolled and folded from the outside to the inside.
9. The curtain airbag according to claim 1, characterized in that: The drawstring is connected to the dead zone of the air bag.
10. The curtain airbag according to claim 1, characterized in that: The guide member is made of metal.