Airbag device and method of manufacturing the same
By using a multi-layered fabric structure with staggered openings, the problem of poor sealing of the airbag was solved, resulting in better overall sealing of the airbag and optimizing the performance of the airbag system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JUNSHENG AUTOMOBILE SAFETY SYST (ANHUI) CO LTD
- Filing Date
- 2023-03-15
- Publication Date
- 2026-07-10
AI Technical Summary
The airbag's sealing performance is affected by the exposure of the gas generator, leading to air leakage, which affects inflation time and internal pressure, and consequently impacts the performance of the SAB system.
The structure adopts a multi-layered fabric with staggered openings. The gas generator has staggered openings and an oblique cut design. The openings are tightly closed after being covered by the fabric to prevent air leakage. The staggered coverage of each opening by multiple layers of fabric ensures the overall airtightness of the airbag.
It improves the overall sealing performance of the airbag, optimizes the performance of the airbag system, prevents air leakage, and ensures the stability of inflation time and internal pressure.
Smart Images
Figure CN116176482B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of airbag technology, specifically to an airbag device and its manufacturing method. Background Technology
[0002] The side airbag (SAB) consists of a generator and an airbag. The generator enters the airbag through a generator inlet, and the rear of the generator usually protrudes from the airbag to facilitate wiring harness connection. However, a problem arises because the generator protrudes from the airbag, which can affect the airbag's sealing performance. Furthermore, some inlets are longer than the generator's diameter, leading to air leakage at the inlet. Severe leakage can result in low internal pressure in the airbag, and even slow inflation and deflation times, impacting the SAB system's performance. Summary of the Invention
[0003] In view of this, the embodiments of this specification provide an airbag device and its manufacturing method, which solves the technical problem of poor airtightness at the gas generator installation position, resulting in better overall sealing of the airbag and optimizing the performance of the airbag system.
[0004] The embodiments in this specification provide the following technical solutions:
[0005] On one hand, an airbag device is provided, comprising a main fabric piece, a first reinforcing piece, and a gas generator. The first reinforcing piece is stacked on the inner panel of the main fabric piece corresponding to the gas generator mounting range. A first passage for mounting the gas generator is provided on the main fabric piece corresponding to the gas generator mounting range. A second passage for the gas generator is provided on the first reinforcing piece. The projection of the second passage on the main fabric piece does not overlap with the position of the first passage.
[0006] In some embodiments, at least a portion of the second passage is an oblique cut.
[0007] In some embodiments, the main fabric piece is further provided with a first wire harness hole and two first bolt holes. The first passage is located on the main fabric piece at a relative position that is collinear with the first wire harness hole and the two first bolt holes when the gas generator is inserted. The length L of the first passage is not less than the sum of the diameter of the gas generator and the length of the bolt.
[0008] In some embodiments, the first reinforcing plate is further provided with a second wire harness hole and two second bolt holes. The second passage is a non-linear cut. The second passage includes a first oblique cut portion and a first remaining cut portion. The second passage is located between the two second bolt holes. The direction of the first oblique cut portion is at an angle α with the installation direction of the gas generator, and the first remaining cut portion is at an angle α' with the installation direction of the gas generator.
[0009] In some embodiments, 25°≤α≤75°, 30°≤α'≤120°.
[0010] In some embodiments, the length x of the first oblique cut portion is not less than the length of the gas generator from the outlet bolt near the outlet to the top of the outlet.
[0011] In some embodiments, a second reinforcing sheet is further stacked on the inner panel of the first reinforcing sheet. The second reinforcing sheet is provided with a third passage for the gas generator to pass through, a third wiring harness hole, and two third bolt holes. The third passage is a non-linear cut, comprising a second oblique cut portion and a second remaining cut portion. The third passage is located between the two third bolt holes. The direction of the second oblique cut portion forms an angle β with the installation direction of the gas generator, and the direction of the second remaining cut portion forms the same angle β with the installation direction of the gas generator. ’ Where β>α, and anti-misalignment pre-stitching lines are provided at corresponding positions of the first reinforcing piece and the second reinforcing piece.
[0012] In some embodiments, the two first bolt holes, the two second bolt holes, and the two third bolt holes are respectively provided through each other, and the corresponding first wire harness hole, the second wire harness hole, and the third wire harness hole are provided through each other.
[0013] In some embodiments, the first wire harness hole, the second wire harness hole, and the third wire harness hole are all configured to conform to the tail end of the gas generator.
[0014] On the other hand, a method for manufacturing an airbag device is provided, in which a main fabric piece is laid flat, a first reinforcing sheet is stacked within the range of the corresponding gas generator installation position on the inner panel of the main fabric piece, the first reinforcing sheet is sewn to the main fabric piece, the main fabric piece is folded in half and sewn to form an airbag, the wire harness end of the gas generator is passed laterally through the first through-hole of the main fabric piece and the second through-hole of the first reinforcing sheet until it is pushed out of the second wire harness hole, the gas generator body is completely inserted into the first through-hole, and with the fixed gas generator wire harness end as the center, the body of the gas generator located in the layer between the main fabric piece and the first reinforcing sheet is rotated so that the entire gas generator enters the airbag through the second through-hole of the first reinforcing sheet, the bolt of the gas generator is adjusted until it passes through the bolt hole and tightened, and then the airbag is folded.
[0015] 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:
[0016] By employing a structure involving multiple layers of fabric with staggered openings, after the gas generator is installed, the staggered openings are covered by fabric pieces. Specifically, the lower part of the second passage is pressed and sealed after the gas generator is bolted onto the sheet metal parts (such as the airbag frame). The upper part is also blocked by different fabric pieces during inflation due to the staggered openings. The first passage on the outermost main fabric piece is blocked by the unopened area of the inner first reinforcing piece. This achieves the purpose of preventing air leakage when the airbag is inflated, thus solving the technical problem of poor airtightness at the gas generator installation location, resulting in better overall sealing of the airbag and thus optimizing the performance of the airbag system. Attached Figure Description
[0017] 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.
[0018] Figure 1 This is a perspective view of the airbag device in the deployed state provided in the embodiments of this application;
[0019] Figure 2 This is a perspective view of the airbag device in the deployed state provided in the embodiments of this application;
[0020] Figure 3 This is a perspective view of the airbag device in the deployed state provided in the embodiments of this application. Detailed Implementation
[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0022] 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.
[0023] 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.
[0024] It should also be noted that the illustrations provided in the following embodiments are merely schematic representations of the basic concept of this application. The drawings only show components relevant to this application and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex. 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 practice can be carried out without these specific details.
[0025] In view of the technical defects described in the background art, the inventors, through in-depth analysis and improvement of the airbag itself and the assembly technology with the generator, designed a structure with multiple layers of fabric stacked and staggered openings. After the gas generator is installed, the staggered openings are covered by fabric pieces. When the gas generator is activated, it is inserted laterally through the first through-hole of the main fabric piece, and the tail end is fixed in the wire harness hole. The remaining part, which is in the layer between the first reinforcing piece and the main fabric piece, rotates around the tail end and directly enters the airbag through the second through-hole (and the third through-hole). The second through-hole (especially its oblique cut) allows the remaining part of the gas generator to rotate smoothly through. The upper part of the third through-hole, corresponding to the second through-hole (especially its oblique cut), should be set on the rotation trajectory of the gas generator. In order to prevent mis-insertion, pre-stitched lines can be sewn through the multiple layers of fabric pieces. This finally solves the technical problem of poor airtightness at the gas generator installation position, making the overall sealing of the airbag better, thereby optimizing the performance of the airbag system.
[0026] like Figures 1 to 2As shown, the airbag device provided in this embodiment includes a main fabric piece 1, a gas generator 2, and a first reinforcing piece 7. Specifically, the first reinforcing piece 7 is stacked and covers the inner panel of the main fabric piece 1 corresponding to the mounting area of the gas generator 2. A first passage 3 for mounting the gas generator 2 is provided on the main fabric piece 1 corresponding to the mounting area of the gas generator 2, and a second passage for the gas generator 2 is provided on the first reinforcing piece 7. The projection of the second passage on the main fabric piece 1 does not overlap with the position of the first passage 3, i.e., the two passages are staggered between different layers of the main fabric piece 1 and the first reinforcing piece 7. In some embodiments, the second passage (e.g., Figure 2 The second passage shown, consisting of a first oblique cut portion 11 and a first remaining cut portion 12, has at least a portion that is an oblique cut, for example, as shown in the example. Figure 2 The oblique cut or first oblique cut portion 11 shown is inclined relative to the lateral mounting direction of the gas generator 2, that is, the oblique cut has a certain angle relative to the mounting direction of the gas generator, and the angle is preferably not equal to 90° or 180°. In some embodiments, both the first through port 3 and the second through port can be through port structures with a straight cut shape from the start point to the end point of the cut. In some embodiments, both the first through port 3 and the second through port can be non-straight cut shapes.
[0027] In some embodiments, such as Figure 1 As shown, the main fabric piece 1 is also provided with a first wire harness hole 6 and two first bolt holes 4 and 5. The first passage 3 is located on the main fabric piece 1 at a relative position that is collinear with the first wire harness hole 6 and the two first bolt holes 4 and 5 when the gas generator 2 is inserted. The length L of the first passage 3 is not less than the sum of the diameter of the gas generator 2 and the bolt length, so as to facilitate the smooth passage of the gas generator 2 and the bolt.
[0028] In some embodiments, such as Figure 2As shown, the first reinforcing plate 3 is also provided with a second wire harness hole 10 and two second bolt holes 8 and 9. The second passage is a non-linear cut, including a first oblique cut portion 11 and a first remaining cut portion 12. The second passage is located between the two second bolt holes 9 and 8. The direction of the first oblique cut portion 11 forms an angle α with the installation direction of the gas generator 2 (as shown by the extension of the center dotted line in the figure), forming a partial oblique cut. The first remaining cut portion 12 forms an angle α' with the installation direction of the gas generator 2. Furthermore, preferably, the length x of the first oblique cut portion 11 is not less than the length of the gas generator 2 from the bolt near the outlet to the top of the outlet. This arrangement ensures that the gas generator 2 can pass through easily without interfering with other components. In some embodiments, 25°≤α≤75°, preferably 30°≤α≤60°, and more preferably α≥45°. In some embodiments, 30°≤α'≤120°, preferably, 80°≤α'≤100°, and more preferably α=90°.
[0029] In some embodiments, to further improve the airtightness of the airbag by staggered layering of reinforcing sheets, a second reinforcing sheet 13 is also stacked on the inner panel of the first reinforcing sheet 7. The second reinforcing sheet 13 is provided with a third passage for the gas generator 2 to pass through (such as a third passage formed by the second oblique cut portion 17 and the second remaining cut portion 18), a third wiring harness hole 16, and two third bolt holes 14 and 15. Figure 3 As shown. Additionally, the third passage is a non-linear cut, comprising a second oblique cut portion 17 and a second remaining cut portion 18. The third passage is located between the two third bolt holes 14 and 15. The direction of the second oblique cut portion 17 forms an angle β with the installation direction of the gas generator 2, and the direction of the second remaining cut portion 18 also forms an angle β with the installation direction of the gas generator 2. ’ Where β>α. In some embodiments, the projections of the second remaining cut portion 18 and the first remaining cut portion 12 on the main fabric piece 1 overlap, that is, the positions of the remaining cut portions of the second reinforcing piece 13 and the first reinforcing piece 7 correspond to each other. In addition, anti-misalignment pre-stitching lines are provided at corresponding positions of the first reinforcing piece 7 and the second reinforcing piece 18 to avoid misalignment when the gas generator 2 is inserted.
[0030] In addition, in some embodiments, the corresponding two first bolt holes 4 and 5, two second bolt holes 8 and 9, and two third bolt holes 14 and 15 are respectively provided through each other, that is... Figures 1 to 3The first bolt hole 4, the second bolt hole 8, and the third bolt hole 14, located on the left side, correspond to the interlayer positions between the main fabric piece 1, the first reinforcing piece 7, and the second reinforcing piece 13. Furthermore, they are interconnected with the corresponding first wire harness hole 6, second wire harness hole 10, and third wire harness hole 16 located between the layers. In some embodiments, the first wire harness hole 6, the second wire harness hole 10, and the third wire harness hole 16 are all contoured to the tail end of the gas generator 2, allowing the gas generator 2 to effectively fit and fill the wire harness holes, further improving airtightness.
[0031] In addition, this application embodiment also provides a method for manufacturing an airbag device, wherein a main fabric piece 1 is laid flat, a first reinforcing sheet 7 is stacked within the installation range of the gas generator 2 on the inner panel of the main fabric piece 1, the first reinforcing sheet 7 is sewn to the main fabric piece 1, the main fabric piece 1 is folded in half and sewn to form an airbag, and the wire harness end of the gas generator 2 is passed laterally through the first through-hole 3 of the main fabric piece 1 and the second through-hole of the first reinforcing sheet 7 (e.g., ...). Figure 2 The first oblique cut portion 11 and the first remaining cut portion 12 shown are shown until the second wire harness hole 10 is pushed out. For example, it can be fixed with the left hand, and the body of the gas generator 2 is completely inserted into the first through port 3. With the fixed end of the gas generator 2 wire harness as the center, rotate the body of the gas generator 2 in the part between the main fabric piece 1 and the first reinforcing piece 7, so that the entire gas generator 2 enters the air bag through the second through port of the first reinforcing piece 7. Adjust the bolt of the gas generator 2 until it passes through the bolt hole, tighten it and then fold the air bag.
[0032] In summary, the airbag device and its manufacturing method provided in this application have at least the following advantages compared to the prior art:
[0033] By employing a structure involving multiple layers of fabric with staggered openings, after the gas generator is installed, the staggered openings are covered by fabric pieces. Specifically, the lower part of the second access port is pressed and sealed after the gas generator is bolted onto the sheet metal parts (such as the airbag frame). The upper part is also blocked by different fabric pieces during inflation due to the staggered openings. The first access port on the outermost main fabric piece is blocked by the unopened area of the inner first reinforcing piece. In particular, the oblique cuts on all or part of the access ports solve the problem of the long columnar gas generator being difficult to insert into the airbag and blindly bolt it. At the same time, because the access ports of each layer of fabric are staggered, after the airbag is folded, each fabric piece covers each opening in a staggered manner, thereby preventing air leakage when the airbag is inflated. This solves the technical problem of poor airtightness at the gas generator installation position, resulting in better overall sealing of the airbag and thus optimizing the performance of the airbag system.
[0034] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing 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 the relevant parts can be referred to the descriptions in the system embodiments.
[0035] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.
[0036] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although various examples have been discussed in the foregoing disclosure of some embodiments of the invention that are currently considered useful, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the spirit and scope of the embodiments described herein. For example, while the system components described above can be implemented by hardware devices, they can also be implemented solely by software solutions, such as installing the described system on existing processing devices or mobile devices.
[0037] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.
Claims
1. An airbag device, comprising a main fabric piece, a first reinforcing sheet, and a gas generator, wherein the first reinforcing sheet is stacked on the inner panel of the main fabric piece corresponding to the mounting range of the gas generator, characterized in that, A first passage for installing the gas generator is provided on the main fabric piece within the corresponding gas generator installation range. The first reinforcing plate has a second passage for a gas generator. This second passage is a non-linear cut, comprising a first oblique cut and a first remaining cut. The direction of the first oblique cut forms an angle α with the mounting direction of the gas generator, and the direction of the first remaining cut also forms an angle α with the mounting direction of the gas generator. ’ Where 25°≤α≤75°, 30°≤α ’ ≤120°, the length x of the first oblique cut portion is not less than the length from the gas generator near the outlet bolt to the top of the outlet; The projection of the second passage on the main fabric piece does not overlap with the position of the first passage; The gas generator enters between the main fabric piece and the first reinforcing piece through the first through-hole, and rotates in the second through-hole to allow the entire gas generator body to enter the airbag. At this time, the orthographic projections of the two ends of the gas generator are located on both sides of the second through-hole.
2. The airbag device according to claim 1, characterized in that, The main fabric piece is also provided with a first wire harness hole and two first bolt holes. The first passage is located on the main fabric piece at a position collinear with the first wire harness hole and the two first bolt holes when the gas generator is inserted. The length L of the first through-hole is not less than the sum of the diameter of the gas generator and the length of the bolt.
3. The airbag device according to claim 2, characterized in that, The first reinforcing plate is also provided with a second wire harness hole and two second bolt holes, and the second passage is located between the two second bolt holes.
4. The airbag device according to claim 3, characterized in that, A second reinforcing sheet is also stacked on the inner panel of the first reinforcing sheet. The second reinforcing sheet is provided with a third passage for the gas generator to pass through, a third wiring harness hole, and two third bolt holes. The third access port is a non-linear cut, comprising a second oblique cut portion and a second remaining cut portion. The third access port is located between the two third bolt holes. The direction of the second oblique cut portion forms an angle β with the installation direction of the gas generator, and the direction of the second remaining cut portion also forms the angle β with the installation direction of the gas generator. ’ Where β>α, and anti-misalignment pre-stitching lines are provided at corresponding positions of the first reinforcing piece and the second reinforcing piece.
5. The airbag device according to claim 4, characterized in that, The two first bolt holes, the two second bolt holes, and the two third bolt holes are respectively connected through each other, and the corresponding first wire harness hole, second wire harness hole, and third wire harness hole are also connected through each other.
6. The airbag device according to claim 4, characterized in that, The first wire harness hole, the second wire harness hole, and the third wire harness hole are all configured to mimic the shape of the tail end of the gas generator.
7. A method for manufacturing an airbag device, comprising: laying a main fabric piece flat; layering a first reinforcing sheet within the corresponding gas generator mounting position range on the inner panel of the main fabric piece; sewing the first reinforcing sheet to the main fabric piece; and folding the main fabric piece in half and sewing the outer perimeter to form an airbag. Pass the gas generator's wiring harness end laterally through the first through-hole of the main fabric piece and the second through-hole of the first reinforcing piece until it is pushed out of the second wiring harness hole. Insert the gas generator body completely into the first through-hole. With the fixed gas generator wiring harness end as the center, rotate the gas generator body located in the partition between the main fabric piece and the first reinforcing piece so that the entire gas generator enters the gas bag through the second through-hole of the first reinforcing piece. Adjust the bolts of the gas generator until they pass through the bolt holes, tighten them, and then fold the gas bag.