A quick inflation device for an automobile airbag

Abstract

The utility model provides a kind of automobile safety air bag quick inflation device, belong to safety air bag technical field. Including jar body, the outside of jar body is fixedly connected with mounting seat, the inside center of jar body is fixedly connected with fixed cylinder, fixed cylinder inside is equipped with igniter, and powder barrel is inserted in the outside of fixed cylinder in jar body inside. The utility model discloses that the release hole is set in the top of sealing cover, so that the gas generated by gas generating agent can flow upwards from the bottom of the jar, and is discharged to the top of the sealing cover. In this gas discharge process, it will be filtered by filter cartridge, effectively prolonging the filtering time of the gas, and thus more fully filtering out harmful substances in the gas. In addition, by optimizing the design of the structure of the powder barrel, the booster tank and the sealing cover, they can be sequentially inserted and installed on the jar before the welding process. Only the connection between the jar and the sealing cover needs to be welded to complete the overall fixation.

Description

Technical Field

[0001] This utility model relates to the field of airbag technology, and in particular to a rapid inflation device for automotive airbags. Background Technology

[0002] As a core component of the automotive airbag system, the airbag gas generator plays a crucial role. In the instant of a collision, it can rapidly generate a large amount of gas to quickly inflate the airbag, thereby buffering the impact force between the occupant and objects inside the vehicle and effectively reducing the risk of injury to the occupant. Since the gas generator needs to be filled with initiators and gas-generating agents, it produces gas to fill the airbag when it explodes. However, the generated gas contains solid particles and harmful substances, so it is essential to filter the gas.

[0003] Currently, gas generators use side exhaust to inflate airbags. However, due to the limited space inside the gas generator, the filter is relatively thin, and the time for the gas to pass through the filter laterally is short, making it difficult to ensure sufficient filtration of harmful substances. In addition, the production process requires welding the gunpowder barrel, pressurizing tank, and sealing cap onto the tank body, making the manufacturing process quite complex. Therefore, this application provides a rapid inflation device for automotive airbags to meet the requirements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a rapid inflation device for automotive airbags. By setting the release hole at the top of the sealing cap, the gas generated by the gas-generating agent flows upward from the bottom of the tank to the top and is discharged. During the process, the gas is filtered by a filter cartridge, extending the filtration time to fully filter out harmful substances. At the same time, the structure of the gunpowder barrel, pressurizing tank and sealing cap is optimized. During welding, only the connection between the tank and the sealing cap needs to be welded, and the processing technology is optimized. Through the above settings, the problems of poor gas filtration and complex assembly process of existing gas generators can be solved.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A rapid inflation device for automotive airbags includes a canister, a mounting base fixedly connected to the outer side of the canister, a fixing cylinder fixedly connected to the center of the canister, an igniter installed inside the fixing cylinder, a gunpowder barrel inserted inside the canister and outside the fixing cylinder, an ignition tube of the igniter extending into the gunpowder barrel, and a pressurization canister inserted outside the gunpowder barrel; a clamping assembly for positioning and sealing the gunpowder barrel and the pressurization canister, and for inflating the airbag with gas generated by releasing the gas-producing agent in the pressurization canister, the clamping assembly being connected to the canister, the gunpowder barrel, and the pressurization canister.

[0007] Optionally, the clamping assembly includes a sealing cap fixed to the top of the tank. The sealing cap has a first protrusion at its center and a second protrusion on the top of the sealing cap and outside the first protrusion. The first and second protrusions are respectively clamped onto the top outer sides of the gunpowder barrel and the pressurizing tank. The sealing cap has a concave portion on the top of the sealing cap and outside the second protrusion. The concave portion has release holes that penetrate the sealing cap at equal intervals inside.

[0008] Optionally, the top of the second protrusion is higher than the outer edge of the sealing cover, and a plurality of openings are provided at equal intervals on the outer edge of the sealing cover.

[0009] Optionally, the bottom of the sealing cover is provided with an insertion part, and one side of the insertion part is provided with a retaining tooth part.

[0010] Optionally, an annular groove is provided on the inner wall of the tank, and the locking teeth are inserted into the annular groove.

[0011] Optionally, a filter cartridge is installed inside the tank and on the outside of the pressurization tank.

[0012] Optionally, the bottom of the insertion part is provided with an abutting part, and the bottom of the abutting part abuts against the top wall of the filter cartridge.

[0013] Optionally, the pressure tank has multiple vent holes equidistantly spaced at the bottom, and the bottom of the inner wall of the pressure tank is provided with a diaphragm for sealing the vent holes.

[0014] Optionally, the bottom of the pressurizing tank is provided with a vertical part, and the side of the filter cartridge away from the contact part abuts against the protrusion.

[0015] Optionally, the gunpowder barrel has an outward expansion portion on its bottom wall, and the pressurizing tank has an expansion portion at its bottom, with the inner wall of the expansion portion fitting against the outer wall of the outward expansion portion.

[0016] Compared with the prior art, this utility model has at least the following beneficial effects:

[0017] In the above-mentioned solution, the rapid inflation device for automotive airbags provided in this application allows the gas generated by the gas-generating agent to flow upward from the bottom of the tank and be discharged from the top of the sealing cap by opening the release hole at the top of the sealing cap. During this gas discharge process, the gas is filtered by the filter cartridge, which effectively extends the filtration time and thus more thoroughly removes harmful substances from the gas. In addition, by optimizing the structure of the gunpowder barrel, pressurized tank, and sealing cap, they can be sequentially inserted and installed onto the tank before the welding process. Only the connection between the tank and the sealing cap needs to be welded to complete the overall fixation, thereby optimizing the gas generator processing technology.

[0018] The top of the gunpowder barrel and the pressurizing tank adopts an open structure. This design facilitates the filling of the gunpowder barrel and the pressurizing tank with initiators and gas-generating agents. The first and second protrusions on the sealing cap can be precisely fitted to the top openings of the gunpowder barrel and the pressurizing tank. This not only achieves the positioning of the gunpowder barrel and the pressurizing tank, but also plays a sealing role, effectively ensuring the structural strength and sealing effect of the gas generator after assembly.

[0019] The plug-in part on the sealing cap can be inserted into the tank. The locking teeth on the plug-in part can tightly engage with the annular groove, which can enhance the lateral and vertical stability of the tank and sealing cap after assembly, and improve the impact resistance of the gas generator when triggered. At the same time, the abutment part at the bottom of the plug-in part can limit the filter cartridge and ensure the stability of the filter cartridge after installation. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0021] Figure 1 A three-dimensional structural diagram of a rapid inflation device;

[0022] Figure 2 A sectional view of the disassembled tank body and sealing cap;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a cross-sectional view of the tank body and sealing cap assembly;

[0025] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0026] Figure 6 This is a schematic diagram showing the disassembled contents of the gunpowder barrel and the pressurization tank.

[0027] Figure label:

[0028] 1. Tank body; 101. Mounting base; 102. Fixing cylinder; 103. Ignition device; 104. Explosive barrel; 105. Pressurization tank; 106. Exhaust port; 107. Filter cartridge; 108. Annular groove; 2. Sealing cover; 201. First protrusion; 202. Recess; 203. Release hole; 204. Opening part; 205. Insertion part; 206. Locking tooth part; 207. Contact part; 208. Second protrusion.

[0029] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0030] The following is a detailed description of a rapid airbag inflation device for automobiles provided by this utility model, in conjunction with the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0031] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0032] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0033] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0034] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0035] like Figure 1 , Figure 2 and Figure 6 As shown, this embodiment of the present invention provides a rapid airbag inflation device for automobiles, including a tank 1. A mounting base 101 is fixedly connected to the outer side of the tank 1. The mounting base 101 is an annular connecting flange, which is fixed to the tank 1 by welding for easy connection to the airbag bracket. A fixing cylinder 102 is fixedly connected to the center of the tank 1. An igniter 103 is installed inside the fixing cylinder 102. A gunpowder barrel 104 is inserted inside the tank 1 and outside the fixing cylinder 102. The ignition tube of the igniter 103 extends into the gunpowder barrel 104. A pressurization tank 105 is inserted outside the gunpowder barrel 104, so that when the igniter 103 is activated, it can quickly ignite the gunpowder inside the gunpowder barrel 104, achieving the effect of rapid detonation and ignition of the initiator in the pressurization tank 105. The pressurization tank 105 is filled with a gas-generating agent, which can quickly ignite after the initiator is ignited and generate a large amount of gas, thereby inflating the airbag. The gunpowder barrel 104 has an outward expansion section on its bottom wall, and the pressurizing tank 105 has an expansion section at its bottom. The inner wall of the expansion section fits into the outer wall of the outward expansion section. This design allows for the plug-in installation of the gunpowder barrel 104 and the pressurizing tank 105 without the need for subsequent welding, thus optimizing the manufacturing process of the gas generator. The pressurizing tank 105 has multiple vent holes 106 evenly spaced at its bottom, and the bottom of the inner wall of the pressurizing tank 105 has a diaphragm for sealing the vent holes 106. The diaphragm not only seals the pressurizing tank 105 to prevent leakage of the gas-generating agent inside, but also ruptures quickly after the gas expands, without affecting the gas discharge. The clamping assembly is used to position and seal the gunpowder barrel 104 and the pressurizing tank 105, and also to fill the safety airbag with the gas generated by releasing the gas-generating agent in the pressurizing tank 105. The clamping assembly is connected to the tank body 1, the gunpowder barrel 104, and the pressurizing tank 105.

[0036] In this embodiment, as Figures 2 to 5As shown, the clamping assembly includes a sealing cap 2 fixed to the top of the tank 1. A first protrusion 201 is provided at the center of the sealing cap 2, and a second protrusion 208 is provided on the top of the sealing cap 2, outside the first protrusion 201. The first protrusion 201 and the second protrusion 208 respectively clamp onto the outer top of the gunpowder barrel 104 and the pressurizing tank 105. The first protrusion 201 and the second protrusion 208 on the sealing cap 2 can precisely fit and conform to the top openings of the gunpowder barrel 104 and the pressurizing tank 105. Furthermore, the gunpowder barrel 104 and the pressurizing tank 105 are pre-fixed before welding the sealing cover 2, and the sealing cover 2 can also seal and fix the gunpowder barrel 104 and the pressurizing tank 105 after welding. The manufacturing process is optimized while ensuring the overall structural strength of the gas generator. A recessed portion 202 is provided on the top of the sealing cover 2, outside the second protrusion 208. Release holes 203 penetrating the sealing cover 2 are equidistantly opened inside the recessed portion 202. The top of the second protrusion 208 is higher than the outer edge of the sealing cover 2. Multiple openings 204 are evenly spaced on the outer edge. This design separates the release hole 203 from the inner wall of the airbag, preventing the release hole 203 from being blocked by the folded airbag. Simultaneously, the openings 204 ensure that the generated gas quickly inflates into the airbag, enabling rapid airbag deployment and ensuring the safety of occupants. The bottom of the sealing cap 2 has an insertion part 205, and one side of the insertion part 205 has a retaining tooth 206. An annular groove 108 is formed on the inner wall of the tank body 1, and the retaining tooth 206 inserts into the annular groove. Inside the slot 108, this design allows the sealing cap 2 to be installed on the tank body 1 before welding, thereby improving the stability during the welding process and ensuring the uniformity of the weld. At the same time, through the overlapping part of the insertion part 205 and the tank body 1, and the biting part of the locking tooth part 206 and the annular slot 108, the resistance to lateral and vertical separation between the sealing cap 2 and the tank body 1 can be increased, thereby improving the overall impact resistance of the gas generator and preventing the overall breakage caused by a sudden increase in internal pressure, further improving the safety of the airbag deployment.

[0037] In this embodiment, as Figures 2 to 5 As shown, a filter cartridge 107 is installed inside the tank 1 and outside the pressurization tank 105. The bottom of the insertion part 205 is provided with an abutment part 207, and the bottom of the abutment part 207 abuts against the top wall of the filter cartridge 107. The bottom of the pressurization tank 105 is provided with a vertical part, and the side of the filter cartridge 107 away from the abutment part 207 abuts against the protrusion. By using the abutment part 207 in conjunction with the vertical part on the pressurization tank 105, the filter cartridge 107 can be limited to ensure its stability after installation. This allows the generated gas to enter through the bottom of the filter cartridge 107 and exit from its top, thereby improving the sufficiency of gas filtration and reducing the leakage of harmful substances and particulate matter in the gas.

[0038] The working principle of this utility model:

[0039] When assembling the device, first insert the gunpowder barrel 104 outside the fixed cylinder 102, and place the filter cartridge 107 inside the tank body 1. Then, insert the pressurizing tank 105, so that the expansion part at the bottom of the pressurizing tank 105 fits against the expansion part on the gunpowder barrel 104. At this time, the filter cartridge 107 is squeezed by the pressurizing tank 105 and fits against the inner wall of the tank body 1. Then, fill the initiator and gas-generating agent into the gunpowder barrel 104 and the pressurizing tank 105 respectively. Cover the top of the tank body 1 with the sealing cap 2 and press it down. At this time, the insertion part 205 at the bottom of the sealing cap 2 is deformed by pressure. When the sealing cap 2 is completely fitted with the tank body 1, the shape of the insertion part 205 is restored and drives the locking part 206 to engage in the annular locking groove 108. At the same time, the contact part 207 contacts the top of the filter cartridge 107, thereby fixing the filter cartridge 107. After the sealing cap 2 is installed, its top... The first protrusion 201 and the second protrusion 208 are respectively attached to the outer edges of the gunpowder barrel 104 and the pressurization tank 105, thereby fixing and sealing the gunpowder barrel 104 and the pressurization tank 105. Then, the sealing cover 2 and the tank body 1 are welded together. The sealing cover 2 and a part of the tank body 1 are inserted into the airbag and connected to the bracket on the airbag through the mounting base 101 to complete the installation. When the car collides, the igniter 103 receives the start command. At this time, the igniter 103 ignites the initiator in the gunpowder barrel 104. The flame generated by the initiator ignites the gas-generating agent in the pressurization tank 105. The rapidly generated gas breaks through the diaphragm and enters the tank body 1 through the exhaust port 106. Then, it enters the airbag through the filter cartridge 107 and the release port 203, thereby realizing the rapid deployment of the airbag.

[0040] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A quick inflation device for automobile safety air bag, comprising a tank, an installation seat is fixedly connected to the outside of the tank, a fixed cylinder is fixedly connected to the inside center of the tank, and an igniter is installed in the inside of the fixed cylinder, characterized in that, A gunpowder barrel is inserted inside the canister and outside the fixed cylinder. The ignition tube of the igniter extends into the gunpowder barrel. A pressurizing canister is inserted outside the gunpowder barrel. A clamping assembly is used to position and seal the gunpowder barrel and the pressurizing tank, and also to fill the airbag with gas generated by the gas-producing agent in the pressurizing tank. The clamping assembly is connected to the tank body, the gunpowder barrel and the pressurizing tank.

2. The automobile airbag rapid inflation device according to claim 1, characterized in that, The clamping assembly includes a sealing cap fixed to the top of the tank. A first protrusion is provided at the center of the sealing cap, and a second protrusion is provided on the top of the sealing cap and outside the first protrusion. The first and second protrusions are respectively clamped onto the top outer sides of the gunpowder barrel and the pressurizing tank. A concave portion is provided on the top of the sealing cap and outside the second protrusion. Release holes penetrating the sealing cap are equidistantly opened inside the concave portion.

3. The rapid inflation device for automotive airbags according to claim 2, characterized in that, The top of the second protrusion is higher than the outer edge of the sealing cover, and multiple openings are equidistantly provided on the outer edge of the sealing cover.

4. The rapid inflation device for automotive airbags according to claim 2, characterized in that, The bottom of the sealing cap is provided with an insertion part, and one side of the insertion part is provided with a retaining tooth part.

5. The rapid inflation device for automotive airbags according to claim 4, characterized in that, The inner wall of the tank is provided with an annular groove, and the locking teeth are inserted into the annular groove.

6. The rapid inflation device for automotive airbags according to claim 5, characterized in that, A filter cartridge is installed inside the tank and on the outside of the pressurization tank.

7. The rapid inflation device for automotive airbags according to claim 6, characterized in that, The bottom of the insertion part is provided with an abutting part, and the bottom of the abutting part abuts against the top wall of the filter cartridge.

8. The rapid inflation device for automotive airbags according to claim 1, characterized in that, The pressure tank has multiple vent holes at equal intervals at the bottom, and the bottom of the inner wall of the pressure tank is provided with a diaphragm for sealing the vent holes.

9. The rapid inflation device for automotive airbags according to claim 7, characterized in that, The bottom of the booster tank is provided with a vertical part, and the side of the filter cartridge away from the contact part abuts against the protrusion.

10. The rapid inflation device for automotive airbags according to claim 1, characterized in that, The gunpowder barrel has an outward expansion section at its bottom wall, and the pressure tank has an expansion section at its bottom, with the inner wall of the expansion section fitting against the outer wall of the outward expansion section.

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