Airbag device

Abstract

The application discloses an air bag device, which comprises an air bag, a gas generator, a shell, a heat insulation sheet and a horn support, the gas generator is installed in the air bag, the bolt of the gas generator is passed through the bolt hole of the air bag and the bolt hole of the shell to be fastened with the shell, the heat insulation sheet is installed in the shell and located between the shell and the gas generator, the heat insulation sheet is provided with a main ring part and a transition section, the transition section extends from the main ring part to the periphery of the shell, a supporting leg is arranged at the end of the transition section, the supporting leg is passed through the supporting leg hole of the shell and is passed from the inner side of the shell to the outer side of the shell to serve as the first contact of the horn, and the end of the supporting leg is used as the contact of the horn.

Description

Technical Field

[0001] This invention relates to the field of automotive passive safety technology, specifically to an airbag device. Background Technology

[0002] Traditionally, the gas generator of a driver's side airbag is installed inside the housing, which is typically made of metal. The structural strength of the metal housing is sufficient to meet the requirements of airbag deployment. However, with the increasing demand for cost reduction and lightweight automotive components, housing materials are gradually being replaced by plastics. Compared to metal, plastic housings have lower structural strength and insufficient heat resistance. Therefore, heat insulation sheets are used between the plastic housing and the gas generator. The horn mechanism installed in the driver's side airbag is structurally complex. Some designs use two horn discs as the first and second contact points, while others use the airbag and steering wheel fasteners or shock absorbers as one of the contact points to activate the horn by contacting the other horn disc. Both designs are complex, costly, and have poor stability.

[0003] In view of the shortcomings of the existing technology, the present invention proposes a new inventive concept. Summary of the Invention

[0004] This invention provides a novel airbag heat insulation sheet. The original metal heat insulation sheet is bent and embedded into a newly designed plastic shell. This improves the overall structural strength of the shell, isolates the high temperature of the gas generator, and reduces the risk of deformation of the plastic shell due to high temperatures. Simultaneously, the heat insulation sheet's support legs can be used as contacts for the horn mechanism. This method is low-cost and effectively solves the problems of complex structures and insufficient stability in existing horn mechanisms. This embodiment provides an airbag device, including: The system comprises an air bag, a gas generator, a housing, a heat insulation sheet, and a horn bracket. The gas generator is installed inside the air bag to supply gas to it. Bolts of the gas generator pass through bolt holes in the air bag and through bolt holes in the housing, and are fastened to the housing. The heat insulation sheet is installed and closely attached to the inner panel of the housing, located between the housing and the two surfaces of the gas generator. The heat insulation sheet has a main ring and a transition section. The transition section extends from the main ring towards the periphery of the housing. A support foot is provided at the end of the transition section. The support foot passes through the support foot hole of the housing, extending from the inside of the housing to the outside of the housing, serving as the first contact point of the horn.

[0005] To save costs, the horn contacts were integrated into the existing heat insulation sheet, and a hole was made on the outer perimeter of the housing to avoid the sleeve. The newly designed heat insulation sheet support legs were then inserted through the newly made hole in the housing to contact the conductive parts of the horn bracket below.

[0006] Preferably, a gas generator mounting opening is provided in the middle of the housing, a gas generator mounting opening is provided in the main ring portion of the heat insulation sheet, the main ring portion of the heat insulation sheet is in through alignment with the two gas generator mounting openings in the middle of the housing, a sleeve is provided on the peripheral portion of the housing, the transition section of the heat insulation sheet is a connecting stroke extending from the main ring portion to the peripheral portion of the housing, the support legs pass through the holes provided on the peripheral portion of the housing while avoiding the sleeve, and the heat insulation sheet is an integrated three-dimensional L-shaped metal conductive component formed by the main ring portion and the transition section which are X+Y direction divergent planes, and a plurality of Z direction crossing type support legs.

[0007] The existing heat insulation sheet only has a main ring portion and an extension section (the transition section of the present solution), which only covers the area where the plastic housing may be deformed by the high temperature of the gas generator for heat insulation and isolation, and the horn mechanism and the heat insulation sheet are completely unrelated components.

[0008] Preferably, the support legs are distributed over the outer peripheral portion of the heat insulation sheet, the end of each support leg is provided with a reinforcing portion, and the reinforcing portion is a contact point formed by bending, flanging or melting the end of the support leg to be thicker than the conventional thickness of the support leg.

[0009] Since the contact points will come into contact with each other multiple times, the original thin support legs may be deformed. In order to ensure their strength to prevent deformation and ensure a certain contact area, the end of the contact point is reinforced and thickened.

[0010] Preferably, there are a plurality of the support legs, and the spacing L1 between the plurality of support legs at the 6 o'clock position is smaller than the spacing L2 between the plurality of support legs at the 12 o'clock position.

[0011] This is only an embodiment. Most housing shapes are narrower toward the occupant side than toward the windshield side, and the reversed situation is relatively rare and may not be very aesthetically pleasing. Therefore, in order to conform to the shape preferred by the public, the feature of L1<L2 is added in this solution. When the cover plate and the housing are designed to have equal widths, L1=L2 is also acceptable.

[0012] Preferably, the housing and the heat insulation sheet are integrally injection-molded. After molding, the main ring portion and the transition section of the heat insulation sheet closely cover the opposite surface of the housing facing the gas generator, and the support legs are located in the support leg holes of the housing.

[0013] Since the heat insulation sheet is relatively thin, it is not impossible to adopt a split type installation later, but on the one hand, uneven force is likely to cause deformation during installation, and on the other hand, a certain gap needs to be reserved during installation. Although the gap is convenient for installation, it is prone to abnormal noise during the driving process of the automobile. In addition, the contact points need to bear force, and the installation gap also easily makes the position of the contact points unstable. After repeated forces, the support legs are also easily deformed due to the gap. Therefore, the integral injection molding of the heat insulation sheet and the housing can solve all the above problems at one time.

[0014] Preferably, the horn bracket has multiple bracket portions, which are connected in series by integral injection molding with steel wire. Each bracket portion has a connecting hole for fasteners connecting the steering wheel and the housing to pass through.

[0015] Preferably, the steel wire of the horn bracket is plastic-coated inside the bracket portion of the horn bracket. A small through hole is provided on the bracket portion of the horn bracket. After the horn bracket is installed on the housing, the through hole of the horn bracket is aligned with the sleeve of the housing. One side of the small through hole of the horn bracket is open to allow the first contact point to contact the steel wire, and the other side of the small through hole is open to observe whether the first contact point and the steel wire are aligned. The steel wire of the horn bracket is the second contact point of the horn. After the first contact point and the second contact point contact, the horn mechanism is activated and the horn is sounded.

[0016] The bracket and steel wire are integrally injection molded, which is an existing technology. Originally, there was no need to open the small through hole. However, because the end of the heat insulation sheet's support foot needs to contact the steel wire of the speaker bracket, the steel wire must be exposed. Opening the small through hole allows the two to contact each other and also allows the overlap of the two to be observed from the other side.

[0017] Preferably, there are multiple second contacts, distributed around the periphery of the speaker bracket support portion, and are aligned with the first contacts.

[0018] The multiple contacts are distributed on the outer periphery to avoid the multiple wire harnesses and multiple wire harness interfaces arranged in the middle area of ​​the bottom of the housing. With the contacts located on the outer periphery of the cover / housing, the force required to press the horn is less, and the horn is easier to press and play.

[0019] Compared with the prior art, the present invention has at least the following technical effects: This solution uses outward-extending bends at the four corners of a sheet metal bending sheet, resulting in a simple structure and process. This eliminates the need for multiple complex horn brackets as the horn's conductive contacts. After the sheet metal bending sheet is assembled into the housing, the conductive contacts are located at the bottom of the housing and on the sides of the four uprights, without occupying the mounting space for the gas generator bolts at the bottom of the airbag housing or for various wiring harnesses. The four uprights at the bottom of the housing are connected to the horn assembly via springs, and the horn assembly has a ring-shaped steel wire. The horn's working principle is as follows: When the driver presses the airbag module, the spring contracts, and the ring-shaped steel wire on the horn assembly contacts the bent conductive contacts of the sheet metal bending sheet, thus completing the circuit. The arrangement of the four conductive contacts can adapt to various pressing conditions, ensuring that at least one ring-shaped steel wire can contact a conductive contact when the driver's airbag is pressed from any direction. Contact at any point forms a complete conductive circuit, enabling the horn to sound. 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 embodiment is a schematic diagram of the heat insulation sheet of an airbag device; Figure 2 This embodiment is a schematic diagram of a horn bracket for an airbag device; Figure 3 This embodiment presents a schematic diagram of the housing of an airbag device; Figure 4 This embodiment is a schematic diagram of the assembly of an airbag device.

[0022] The reference numerals in the drawings of this invention are as follows: 1. Insulation sheet; 2. Main body ring; 3. Transition section; 4. Gas generator bolt hole; 5. Gas generator mounting hole; 6. Support leg; 7. Support leg end; 8. Horn bracket; 9. Support part; 10. Steel wire; 11. Connecting hole; 12. Small through hole; 14. Spring; 15. Housing; 16. Support leg hole; 17. Housing bolt hole; 18. Sleeve; 19. Gas generator mounting port. Detailed Implementation

[0023] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Additionally, 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.

[0028] The present invention will now be described in detail with reference to the accompanying drawings. like Figure 1-4 As shown, this embodiment provides an airbag device, including: The system comprises an air bag, a gas generator, a housing, a heat insulation sheet 1, and a horn bracket 8. The gas generator is installed inside the air bag to supply gas to it. The bolts of the gas generator pass through the bolt holes of the air bag and through the bolt holes of the housing, and are fastened to the housing 15. The heat insulation sheet 1 is installed and closely attached to the inner panel of the housing 15, located between the two surfaces of the housing 15 and the gas generator. The heat insulation sheet 1 has a main ring portion 2 and a transition section 3. The transition section 3 extends from the main ring portion 2 to the periphery of the housing 15. A support leg 6 is provided at the end of the transition section 3. The support leg 6 passes through the support leg hole 16 of the housing 15, from the inside of the housing 15 to the outside of the housing 15, serving as the first contact point 7 of the horn.

[0029] The housing 15 has a gas generator mounting port 19 in the middle, and the main ring 2 of the heat insulation sheet 1 has a gas generator mounting port 5. The main ring 2 of the heat insulation sheet 1 is aligned with the two gas generator mounting ports 5 and 19 in the middle of the housing 15. The housing 15 has a sleeve 18 around its periphery. The transition section 3 of the heat insulation sheet 1 is the connecting stroke of the main ring 2 extending to the periphery of the housing 15. The support leg 6 passes through the hole 16 in the periphery of the housing 15 to avoid the sleeve 18. The heat insulation sheet 1 is an integrated three-dimensional L-shaped metal conductive component formed by the main ring 2 and transition section 3 of the X+Y directional divergent plane and multiple Z-directional through-type support legs 6.

[0030] The support legs 6 are distributed around the outer periphery of the heat insulation sheet 1. The ends of the support legs 6 are provided with reinforcing parts. The reinforcing parts are formed by bending, flanging or melting the ends of the support legs 6 to form contact points 7 that are thicker than the conventional thickness of the support legs.

[0031] There are multiple legs 6, and the distance L1 between the multiple legs 6 at the 6 o'clock position is smaller than the distance L2 between the multiple legs at the 12 o'clock position.

[0032] The housing 15 and the heat insulation sheet 1 are integrally injection molded. After molding, the main body ring 2 and the transition section 3 of the heat insulation sheet 1 are tightly attached to the opposite side of the housing 15 facing the gas generator. The support leg 6 is located in the support leg hole 16 of the housing 15.

[0033] The horn bracket 8 is provided with multiple bracket parts 9, which are connected in series by integral injection molding with steel wire. Each bracket part 9 is provided with a connecting hole 11 for the fasteners connecting the steering wheel and the housing to pass through.

[0034] The steel wire 10 of the speaker bracket 8 is plastic-coated inside the bracket portion 9 of the speaker bracket 8. A small through hole 12 is provided on the bracket portion 9 of the speaker bracket 8. After the speaker bracket 8 is installed on the housing 15, the connecting hole 11 of the speaker bracket 8 is aligned with the sleeve 18 of the housing 15. One side of the small through hole 12 of the speaker bracket 8 is open so that the first contact 7 contacts the steel wire 10. The other side of the small through hole 12 is open so that the first contact 7 and the steel wire 10 can be observed to see whether the first contact 7 and the steel wire 10 are aligned. The steel wire 10 of the speaker bracket 8 is the second contact of the speaker. After the first contact 7 contacts the second contact 10, the speaker mechanism is turned on and the speaker is sounded.

[0035] The second contact point is multiple and is distributed around the periphery of the bracket portion 9 of the speaker bracket 8, and is aligned with the first contact point 7.

[0036] In this specification, similar or identical parts between the various embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the product embodiments described later are relatively simple in description since they correspond to the methods, and relevant parts can be referred to the descriptions in the system embodiments.

[0037] 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. An airbag device, comprising: The device comprises an air bag, a gas generator, a housing, a heat insulation sheet, and a horn bracket. The gas generator is installed inside the air bag to supply gas to the air bag. The bolts of the gas generator pass through bolt holes in the air bag and through bolt holes in the housing, and are fastened to the housing. The heat insulation sheet is installed and closely attached to the inner panel of the housing, located between the two surfaces of the housing and the gas generator. The heat insulation sheet is characterized by having a main ring portion and a transition section. The transition section extends from the main ring portion to the periphery of the housing. A support foot is provided at the end of the transition section. The support foot passes through a support foot hole in the housing and extends from the inside of the housing to the outside of the housing, serving as the first contact point of the horn.

2. The airbag device according to claim 1, characterized in that, The housing has a gas generator mounting port in the middle, and the main ring of the heat insulation sheet has a gas generator mounting port. The main ring of the heat insulation sheet is aligned with the two gas generator mounting ports in the middle of the housing. The housing has a sleeve around its periphery. The transition section of the heat insulation sheet is the connecting stroke of the main ring extending to the periphery of the housing. The support legs pass through the holes in the periphery of the housing to avoid the sleeve. The heat insulation sheet is an integrated three-dimensional L-shaped metal conductive component formed by a main ring with an X+Y radiating plane, a transition section, and multiple Z-direction through-type support legs.

3. The airbag device according to claim 1, characterized in that, The legs are distributed around the outer periphery of the heat insulation sheet, and the ends of the legs are provided with reinforcing parts. The reinforcing parts are formed by bending, flanging or melting the ends of the legs to create contacts that are thicker than the conventional thickness of the legs.

4. The airbag device according to claim 1, characterized in that, The support has multiple legs, and the distance L1 between the multiple legs at the 6 o'clock position is smaller than the distance L2 between the multiple legs at the 12 o'clock position.

5. An airbag device according to claim 1, characterized in that, The housing and the heat insulation sheet are integrally injection molded. After molding, the main ring and transition section of the heat insulation sheet are tightly attached to the opposite side of the housing facing the gas generator, and the support feet are located in the support foot holes of the housing.

6. An airbag device according to claim 1, characterized in that, The horn bracket has multiple bracket sections, which are connected in series by integral injection molding with steel wire. Each bracket section has a connecting hole for the fasteners connecting the steering wheel and the housing to pass through.

7. An airbag device according to claim 6, characterized in that, The steel wire of the horn bracket is plastic-coated inside the bracket portion of the horn bracket. A small through hole is provided on the bracket portion of the horn bracket. After the horn bracket is installed on the housing, the through hole of the horn bracket is aligned with the sleeve of the housing. One side of the small through hole of the horn bracket is open so that the first contact point contacts the steel wire. The other side of the small through hole is open so that the alignment of the first contact point and the steel wire can be observed. The steel wire of the horn bracket is the second contact point of the horn. After the first contact point contacts the second contact point, the horn mechanism is activated and the horn is sounded.

8. An airbag device according to claim 7, characterized in that, The second contact is multiple and distributed around the periphery of the speaker bracket support, and is aligned with the first contact.

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