A side air curtain device

Abstract

The present application provides a side airbag device, which is applied to the technical field of airbags. The side airbag device includes an airbag, a gas generator, a bracket, and a barrier member. The airbag includes a main chamber and an air inlet portion. An uninflated area is provided on the main chamber. The barrier member is disposed on the outer periphery of the uninflated area, and a barrier is provided on the barrier member. During the deployment process of the airbag, the barrier on the barrier member breaks, tears, or forms a diversion channel to prevent the gas generated by the gas generator from directly impacting the easily torn portion of the uninflated area when entering the airbag from the air inlet portion. By providing the barrier member, excessive tearing of the uninflated area during ignition is avoided, which can cause air leakage, and it can ensure meeting the requirement of maintaining pressure for 6 seconds for use.

Description

Technical Field

[0001] This application relates to the technical field of airbag, and particularly to a side curtain airbag device. Background Art

[0002] Generally, a side curtain airbag device is used to protect the driver and passengers in a vehicle side collision. After receiving a collision signal, a gas generator is ignited, and the gas generated by the gas generator causes the side curtain airbag to expand and deploy. In fact, in addition to protecting the driver and passengers during a side collision, the side curtain airbag also needs to protect the occupants when the vehicle rolls over. At this time, a certain pressure needs to be maintained in the side curtain airbag cavity to avoid protection failure. Regulations stipulate that the side curtain airbag should maintain pressure continuously within 6 seconds after being fully deployed. In the prior art, the airbag is mostly manufactured by the method of fabric cutting - coating with sealing silicone - sewing. The cavity of the airbag is separated by the sealing silicone combined with sewing threads. However, in actual use, the sealing silicone is prone to tearing and extending to the sewing thread, resulting in the exposure of sewing needle holes, and the gas is likely to leak from the needle holes of the sewing thread, ultimately failing to meet the requirement of 6 - second pressure maintenance. Summary of the Invention

[0003] In view of this, the embodiments of this specification provide a side curtain airbag device. By providing a barrier member, it is possible to prevent the gas from directly blowing to the non - inflatable area during ignition, resulting in excessive tearing, so as to avoid gas leakage from the sewing needle holes and achieve the effect of 6 - second pressure maintenance.

[0004] The embodiments of this specification provide the following technical solutions:

[0005] The embodiments of this specification provide a side curtain airbag device, including an airbag, a gas generator, and a bracket. The airbag includes a main chamber and an air inlet portion. There is a non - inflatable area on the main chamber. The side curtain airbag device further includes a barrier member. Among them, the barrier member is arranged on the outer periphery of the non - inflatable area, and there is a barrier on the barrier member. During the deployment process of the airbag, the barrier on the barrier member breaks, tears, or forms a diversion channel to prevent the gas generated by the gas generator from directly impacting the easily - torn part of the non - inflatable area when entering the airbag from the air inlet portion.

[0006] Preferably, two coated fabrics are respectively used as two main fabric pieces to form the airbag. Among them, glue is applied at a preset position on the glue surface of the coated fabric, and the two coated surfaces are stacked opposite to each other, pressed, and sewn to form the non - inflatable area.

[0007] Preferably, the barrier member is composed of two single - sided coated fabric pieces. Among them, the non - coated surfaces of the two single - sided coated fabric pieces are stacked opposite to each other, and a hollow is formed in the middle to accommodate the non - inflatable area.

[0008] Preferably, a bursting line is sewn through the two single-sided coated fabric pieces, wherein the two coated surfaces of the two single-sided coated fabric pieces are respectively arranged opposite to the coated surfaces of the two coated fabrics, so that after the two single-sided coated fabric pieces and the two coated fabrics are pressed, the non-inflatable area is closely attached to the barrier, so that the bursting line is impacted and breaks first after the gas generator is detonated.

[0009] Preferably, after the outer coated surfaces of the two single-sided coated fabric pieces are coated with sealing silicone, they are opposite to the coated surfaces of the two main fabric pieces and adhered. After the two single-sided coated fabric pieces and the two coated fabrics are pressed, the non-inflatable area is closely attached to the barrier, so that the sealing silicone is torn by the gas impact after the gas generator is detonated.

[0010] Preferably, intermittent stitches are provided on the two fabric pieces of the barrier, and openings are formed at the transition positions between the stitches. The openings are impacted and opened to form channels after the gas generator is detonated, so that gas passes through the channels and circulates in the main chamber; wherein, the sewing range of the stitches limits the size of the openings and the thickness of the channels.

[0011] Preferably, the two single-sided coated fabric pieces are provided with multiple protruding parts, reinforcing stitches are penetrated through the positions of the protruding parts, and a concave area is formed between adjacent protruding parts to form a transition area, and there is no barrier in the transition area.

[0012] Preferably, the two outer coated surfaces of the barrier are coated with sealing silicone, are opposite to the coated surfaces of the two coated fabrics and adhered. After pressing the two coated fabrics to make them closely attached to the barrier, the transition area is washed open to form a channel after the gas generator is detonated, and the size of the channel is limited by the edges between the protruding parts on both sides of the transition area.

[0013] Preferably, stitches are penetrated through the two single-sided coated fabric pieces or elastic members are provided between the two non-coated surfaces of the two single-sided coated fabric pieces.

[0014] Preferably, after the lower coated surface of the barrier is coated with sealing silicone, it is adhered to the outer periphery of the non-inflatable area on the coated surface of a main fabric piece, and sealing silicone is coated on the upper coated surface of the barrier and glue is coated at the preset position of the main fabric piece. Then, the coated surfaces of the two main fabric pieces are opposite to each other, so that after being pressed, the two main fabric pieces are closely attached to each other and the main fabric piece is closely attached to the barrier, and then the stitches are sewn at the designated positions.

[0015] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of this specification at least include:

[0016] By adding a barrier component around the non-inflated area of the side airbag curtain, it is used to prevent the barrier component from improving the tearing degree of the sealing silicone in the non-inflated area by breaking, tearing or forming a channel during the airbag explosion, avoid gas leakage from the suture needle holes, achieve the effect of maintaining pressure for 6 seconds, and protect the occupants during side collisions and rollovers of the vehicle. Brief Description of the Drawings

[0017] 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 in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of an existing CSS airbag curtain;

[0019] Figure 2 is a schematic structural diagram of the non-inflated area of an existing CSS airbag curtain;

[0020] Figure 3 is a partial structural schematic diagram of the A-A section of the non-inflated area of an existing CSS airbag curtain;

[0021] Figure 4 is a partial structural schematic diagram of the silicone tearing state in the non-inflated area of an existing CSS airbag curtain;

[0022] Figure 5 is a schematic structural diagram of the non-inflated area of a side airbag curtain in the present application with a barrier sheet provided;

[0023] Figure 6 is a partial structural schematic diagram of the B-B section in the present application;

[0024] Figure 7 is a partial structural schematic diagram of the C-C section in the present application;

[0025] Figure 8 is a schematic structural diagram of the non-inflated area of another side airbag curtain in the present application with a barrier sheet provided;

[0026] Figure 9 is a partial structural schematic diagram of the E-E section in the present application;

[0027] Figure 10 is a schematic structural diagram of the non-inflated area of another side airbag curtain in the present application with a barrier sheet provided;

[0028] Figure 11 is a partial structural schematic diagram of the F-F section in the present application;

[0029] Figure 12It is a schematic structural diagram of another structure in which a barrier sheet is arranged in the non-inflated area of the side air curtain in this application;

[0030] Figure 13 It is a partial structural schematic diagram of the D-D section in this application;

[0031] Figure 14 It is a schematic structural diagram of another structure in which a barrier sheet is arranged in the non-inflated area of the side air curtain in this application;

[0032] Figure 15 It is a partial structural schematic diagram of the G-G section in this application;

[0033] Figure 16 It is a partial structural schematic diagram of the non-inflated area filled with silica gel in a torn state in this application;

[0034] Figure 17 It is a partial structural schematic diagram of the non-inflated area filled with silica gel in a torn state in this application;

[0035] Figure 18 It is a schematic structural diagram of the convex part provided with stitches. Detailed implementation manners

[0036] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0037] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content 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 manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0038] It should be noted that the following describes various aspects of embodiments within the scope of the appended claims. It will 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 illustrative only. Based on this application, those skilled in the art should 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 a device and / or practice a method. Additionally, this device and / or method can be implemented using other structures and / or functionality in addition to one or more of the aspects set forth herein.

[0039] It should also be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0040] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0041] As Figures 1 to 4 shown, in the existing side airbag (CSS airbag), the airbag is usually manufactured by the method of fabric cutting - coating with sealing silicone - sewing. The cavity of the airbag is separated by the sealing silicone combined with the sewing thread. In actual use, although to a certain extent, it can effectively prevent gas from leaking from the needle holes and meet the requirement of 6 - second pressure retention, in most cases, the sealing silicone in the non - inflated area of the airbag is easily torn and extended to the sewing thread due to strong air flow impact, resulting in the exposure of the sewing needle holes, and the gas is likely to leak from the needle holes of the sewing thread, ultimately unable to meet the requirement of 6 - second pressure retention.

[0042] Based on this, in the improvement of the side airbag, considering that the side airbag device usually includes a bladder, a gas generator, a bracket, and the bladder includes a main chamber and an air inlet part, and there is a non - inflated area on the main chamber, thus this specification provides a side airbag pressure retention structure on this basis: that is, a barrier is added on the outer periphery of the non - inflated area of the side airbag (airbag bladder). During the airbag explosion process, the barrier blocks the gas generated by the gas generator from directly impacting the easily torn part of the non - inflated area by means of breaking, tearing, or forming a channel, thereby improving the tearing degree of the sealing silicone in the non - inflated area, avoiding gas leakage from the sewing needle holes, achieving the effect of 6 - second pressure retention, and further protecting the occupants during side collisions and rollovers of the vehicle.

[0043] During implementation, the side airbag device further includes a barrier member; wherein, the barrier member is disposed on the outer periphery of the non-inflatable region, and a barrier is provided on the barrier member. During the deployment process of the airbag, the barrier on the barrier member breaks, tears, or forms a diversion channel to prevent the gas generated by the gas generator from directly impacting the easily torn part of the non-inflatable region when entering the airbag from the air inlet portion, thereby preventing the gas from leaking out through the needle holes of the stitches after the non-inflatable region is broken through.

[0044] The following is an example illustration according to the attached Figure 5 - attached Figure 18 for example:

[0045] In one example, the main fabric pieces of the airbag can be composed of two coated fabrics to form a non-inflatable region: the two coated fabrics serve as the two main fabric pieces to form the airbag respectively. Glue is applied at a preset position on the glue surfaces of the coated fabrics, and then the two glue surfaces are stacked, pressed, and sewn together to form a non-inflatable region, that is, the non-inflatable region is formed by applying glue at a specified position on the glue surfaces of the coated fabrics, and then stacking, pressing, and sewing the two glue surfaces together.

[0046] In one example, when a barrier member is disposed on the outer periphery of the non-inflatable region of the airbag and a barrier is provided on the barrier member, the barrier can be a bursting line, an elastic member, or a reinforcing stitch at this time.

[0047] In one example, the barrier member is composed of two single-sided coated fabric pieces, and their non-coated surfaces are stacked relative to each other and hollowed out in the middle to accommodate the non-inflatable region.

[0048] In one example, a bursting line is sewn through the two single-sided coated fabric pieces. The two coated surfaces of the two single-sided coated fabric pieces are respectively arranged opposite to the coated surfaces of the two coated fabrics, so that after the two single-sided coated fabric pieces and the two coated fabrics are pressed, the non-inflatable region is in close contact with the barrier member, and the bursting line is impacted and breaks first after the gas generator is detonated.

[0049] Specifically, a bursting line is sewn through the two fabric pieces of the barrier member. The two coated surfaces of the barrier member are respectively arranged opposite to the coated surfaces of the two main fabric pieces of the airbag. The outer sides of the two fabric pieces of the barrier member are coated with glue, and the main fabric pieces are pressed to make them in close contact with the barrier member. The bursting line is impacted and breaks after the gas generator is detonated. It should be noted that the bursting line has a relatively low strength and the breaking force is lower than the tearing force after silicone bonding, so as to play a stable buffering effect during the detonation process.

[0050] In one example, the barrier is composed of two single-sided coated cloth sheets, the non-coated surfaces of the two cloth sheets are coated with sealing silicone and are stacked relative to each other, with a hollow in the middle to accommodate the non-inflated area. The two outer coated surfaces of the barrier are coated with sealing silicone, which are opposite to and bonded to the coated surfaces of the two main cloth sheets, and the two main cloth sheets are pressed to make them tightly attached to the barrier. The adhesive silicone on the two non-coated surfaces of the barrier is torn by the impact of the gas after the gas generator is ignited.

[0051] Specifically, after the outer coating surfaces of the two single-sided coated cloth pieces are coated with sealing silicone, they are opposite to and bonded to the coating surfaces of the two main cloth pieces, wherein after the two single-sided coated cloth pieces and the two coated cloth pieces are pressed, the non-inflated area is tightly attached to the barrier piece, so that the sealing silicone is torn by the impact of the gas after the gas generator is ignited.

[0052] Because the main cloth is coated cloth, the barrier is also coated cloth, the coated surfaces of the two cloths are opposite to each other, and the sealing silicone is applied to make the two cloths have a high degree of adhesion, while the uncoated surfaces of the two cloths of the barrier are opposite to each other, and only the two uncoated surfaces are bonded with silicone, and the adhesion and tearing force are relatively small. Therefore, when the gas generator is inflated, the sealing silicone part in the middle of the barrier is torn first, achieving a buffering effect.

[0053] The airbag is provided with cloth and silicone, so that the thickness, weight and elasticity of this area are thicker and heavier than the rest of the airbag, and the impact force it can withstand is greater.

[0054] In one example, the barrier is composed of two single-sided coated cloth sheets, the non-coated surfaces of the two cloth sheets are stacked relative to each other, and the middle is hollowed out to accommodate the non-inflated area. Intermittent stitches are provided on the two cloth sheets running through the barrier, and the transition positions of the stitches form openings. The two outer coatings of the barrier are

[0055] The surface is coated with sealing silicone, facing and adhering to the coated surface of the two main fabric pieces, and the two main fabric pieces are pressed to make them close to the barrier. The opening is opened by impact after the gas generator is detonated to form a channel, and the suture cannot be broken. The sewing range of the suture limits the size of the opening and the thickness of the channel to prevent the non-inflated area from being torn. The gas can flow in the main chamber through the channel without affecting the volume of the airbag.

[0056] Intermittent stitches are provided on the two cloth pieces that pass through the barrier, and an opening is formed at the transition position between the stitches. After the gas generator is ignited, the opening is opened by the impact to form a channel, allowing the gas to pass through the channel and flow in the main chamber; wherein the stitching range limits the size of the opening and the thickness of the channel.

[0057] At this time, the general gas will directly impact the non-inflated area. At the same time, as the airbag bulges, the non-inflated area will also be subject to the tearing force. After the size of the channel is set, the tearing force of the non-inflated area in the thickness direction of the airbag is avoided.

[0058] In one example, the barrier is composed of two single-sided coated fabric pieces. The non-coated sides of the two fabric pieces are stacked facing each other, and a hollow is formed in the middle to accommodate the non-inflated area. Multiple protrusions are provided on the two fabric pieces.

[0059] Reinforcing stitches are provided through the protrusions. An intermediate area is formed between the protrusions, and there is no barrier in the intermediate area. The coated surfaces on the two outer sides of the barrier are coated with sealing silicone, which faces and adheres to the coated surfaces of the two main fabric pieces. Press the two main fabric pieces to make them close to the barrier.

[0060] By providing multiple protrusions on the two single-sided coated fabric pieces, providing reinforcing stitches through the positions of the protrusions, and forming an intermediate area with a concave area between adjacent protrusions, and there is no barrier in the intermediate area. At this time, after the barrier bulges, the protrusions can form the shape of a pulling belt. On the one hand, it can prevent the gas from directly impacting the non-inflated area. On the other hand, it can limit the thickness of the barrier area when the airbag expands and prevent the non-inflated area from being overly torn.

[0061] In one example, the coated surfaces on the two outer sides of the barrier are coated with sealing silicone, which faces and adheres to the coated surfaces of the two coated fabric pieces. Press the two coated fabric pieces to make them close to the barrier. After the gas generator explodes, the intermediate area is flushed open to form a channel, and the size of the channel is defined by the edges between the protrusions on both sides of the intermediate area. Therefore, after the gas generator explodes, the intermediate area is flushed open to form a channel, and the size of the channel is defined by the edges of the protrusions.

[0062] In one example, the barrier is composed of two coated fabric pieces. The non-coated sides of the two fabric pieces are stacked facing each other, and a hollow is formed in the middle to accommodate the non-inflated area. Stitches are provided through the two fabric pieces or an elastic member is provided between the two non-coated sides, so as to press the barrier to form a part.

[0063] In one example, the lower coated surface of the barrier is coated with sealing silicone and adhered to the outer periphery of the non-inflated area on the coated surface of a main fabric piece. Then, the upper coated surface of the barrier is coated with sealing silicone, and after applying glue at the specified position on the main fabric piece, the coated surfaces of the two main fabric pieces are faced each other, press the main fabric pieces to make the main fabric pieces close to each other and the barrier, and sew stitches at the specified position.

[0064] Specifically, after applying sealing silicone on the lower coating surface of the barrier member, it is adhered to the outer periphery of the non-inflated area on the coating surface of a main fabric piece. And after applying sealing silicone on the upper coating surface of the barrier member and applying glue at a preset position on the main fabric piece, the coating surfaces of the two main fabric pieces face each other. After being pressed, when the two main fabric pieces and the barrier member are in close contact with each other, stitches are sewn at the designated positions.

[0065] In this specification, for the same or similar parts among the various embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the methods, the descriptions are relatively simple, and for the relevant parts, reference can be made to the partial descriptions of the system embodiments.

[0066] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A side airbag device, comprising an airbag, a gas generator, and a bracket, wherein the airbag includes a main chamber and an air inlet portion, and a non-inflatable area is provided on the main chamber, and it is characterized in that, The side curtain airbag device further includes a barrier member; wherein, the barrier member is disposed on the outer periphery of the non-inflatable area and is hollowed out in the middle to accommodate the non-inflatable area, and a barrier is provided on the barrier member. During the deployment process of the airbag, the barrier on the barrier member breaks, tears or forms a diversion channel to prevent the gas generated by the gas generator from directly impacting the easily torn part of the non-inflatable area when entering the airbag from the air inlet portion.

2. The side air curtain device according to claim 1, characterized in that, Two coated fabrics respectively serve as two main fabric pieces to form the airbag; wherein, glue is applied at a preset position on the glue surface of the coated fabric, and the two coated surfaces are stacked, pressed and sewn relatively to form the non-inflatable area.

3. The side air curtain device according to claim 2, wherein The barrier member is composed of two single-sided coated fabric pieces, wherein the non-coated surfaces of the two single-sided coated fabric pieces are stacked relatively and are hollowed out in the middle to accommodate the non-inflatable area.

4. The side air curtain device according to claim 3, characterized in that, A bursting line is sewn through the two single-sided coated fabric pieces, wherein the two coated surfaces of the two single-sided coated fabric pieces are respectively arranged opposite to the coated surfaces of the two coated fabrics, so that after the two single-sided coated fabric pieces and the two coated fabrics are pressed, the non-inflatable area is closely attached to the barrier member, and the bursting line is broken first under the impact after the gas generator is detonated.

5. The side air curtain device according to claim 3, characterized in that, After the outer coated surfaces of the two single-sided coated fabric pieces are coated with sealing silicone, they are arranged opposite to and adhered to the coated surfaces of the two main fabric pieces. After the two single-sided coated fabric pieces and the two coated fabrics are pressed, the non-inflatable area is closely attached to the barrier member, and the sealing silicone is torn by the gas impact after the gas generator is detonated.

6. The side air curtain device according to claim 3, characterized in that, Intermittent stitches are provided on the two fabric pieces of the barrier member, and an opening is formed at the transition position between the stitches. The opening is opened under the impact after the gas generator is detonated to form a channel for the gas to flow through the channel in the main chamber; wherein, the sewing range of the stitches limits the size of the opening and the thickness of the channel.

7. The side air curtain device according to claim 3, characterized in that Multiple protruding portions are provided on the two single-sided coated fabric pieces, reinforcing stitches are provided through at the positions of the protruding portions, and a concave area is formed between adjacent protruding portions to form a transition area, and there is no barrier in the transition area.

8. The side air curtain device according to claim 7, characterized in that, The two outer coated surfaces of the barrier member are coated with sealing silicone, are arranged opposite to and adhered to the coated surfaces of the two coated fabrics, and the two coated fabrics are pressed to be closely attached to the barrier member. After the gas generator is detonated, the transition area is washed open to form a channel, and the size and diameter of the channel are defined by the edges between the protruding portions on both sides of the transition area.

9. The side air curtain device according to claim 3, characterized in that, Stitches are provided through the two single-sided coated fabric pieces or an elastic member is provided between the two non-coated surfaces of the two single-sided coated fabric pieces.

10. The side air curtain device according to claim 9, wherein, After the lower coated surface of the barrier member is coated with sealing silicone, it is adhered to the outer periphery of the non-inflatable area on the coated surface of a main fabric piece, and sealing silicone is coated on the upper coated surface of the barrier member. After glue is applied at the preset position of the main fabric piece, the coated surfaces of the two main fabric pieces are arranged opposite to each other, so that after being pressed, the two main fabric pieces are closely attached to each other and the main fabric piece is closely attached to the barrier member, and then the stitches are sewn at the designated positions.

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