Gas generator and vehicle

Abstract

The application discloses a gas generator and a vehicle, relates to the technical field of vehicle manufacturing, and is used for inflating a safety airbag, and the gas generator comprises a shell, an ignition cavity and a gas production cavity are formed in the shell, an ignition structure is arranged in the ignition cavity, and a gas production structure is arranged in the gas production cavity; wherein the gas production cavity is at least two, the at least two gas production cavities are communicated with the ignition cavity respectively, the ignition structure is used for igniting the gas production structures in the at least two gas production cavities, so that the at least two gas production cavities produce gas together, and each gas production cavity is provided with a gas outlet hole used for being communicated with the safety airbag. According to the gas generator, the combustion efficiency of the gas production structure can be improved, the gas production efficiency and the gas production amount can be improved, the combustion is more stable, the deployment efficiency of the safety airbag can be improved, the safety airbag deployment delay can be avoided, and the protection effect on passengers can be improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle manufacturing technology, and more particularly to a gas generator and a vehicle having the gas generator. Background Technology

[0002] A gas generator is a device that converts raw materials into a specific gas through physical or chemical methods. It is used to provide gas stably and safely. In a vehicle's airbag system, when a collision occurs, the gas generator can quickly generate gas to fill the airbag and protect the occupants from injury.

[0003] In related technologies, tubular gas generators are usually long and thin, which makes them prone to ignition delay. The ignition position and the gas outlet are located at opposite ends of the gas generator, meaning that the gas-generating agent and the ignition propellant burn from one end to the other, which can easily lead to unstable combustion and PT output fluctuations. In addition, the long airflow channel results in low combustion efficiency and turbulent airflow, which can also cause PT output fluctuations. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a gas generator that can improve the combustion efficiency of the gas-producing structure, increase the gas generation efficiency and quantity, and make combustion more stable. This, in turn, can improve the deployment efficiency of the airbag, avoid airbag deployment delay, and thus enhance the protection effect for occupants.

[0005] According to an embodiment of the present invention, a gas generator is used to inflate an airbag, and the gas generator includes: a housing, an ignition chamber and a gas generation chamber formed therein, an ignition structure provided in the ignition chamber, and a gas generation structure provided in the gas generation chamber; wherein, there are at least two gas generation chambers, and the at least two gas generation chambers are respectively connected to the ignition chamber, and the ignition structure is used to ignite the gas generation structures in the at least two gas generation chambers so that the at least two gas generation chambers produce gas together, and each gas generation chamber is correspondingly provided with an air outlet for communicating with the airbag.

[0006] According to the gas generator of the present invention, by setting at least two gas-generating chambers, each of which is connected to an ignition chamber, the high-temperature flame and shock wave generated after the ignition structure in the ignition chamber is ignited can enter the at least two gas-generating chambers, simultaneously igniting the at least two gas-generating structures. This allows the at least two gas-generating chambers to jointly generate high-temperature and high-pressure gas, thereby improving combustion efficiency, increasing gas generation efficiency and quantity, shortening the airflow path, and enabling more rapid and uniform ignition of the gas-generating structures in the at least two gas-generating chambers, further improving combustion efficiency and making combustion more stable. Furthermore, the gas generated in each gas-generating chamber can be simultaneously released to the airbag through the vent, thereby improving the airbag deployment efficiency, avoiding airbag deployment delay, and thus enhancing the protection effect for occupants.

[0007] According to some embodiments of the gas generator of the present invention, at least two gas generating chambers are distributed around the ignition chamber, and at least two gas generating chambers are respectively connected to the radial outer side of the ignition chamber.

[0008] According to some embodiments of the gas generator of the present invention, there are two gas generating chambers, which are directly opposite each other and connected to the radial sides of the ignition chamber.

[0009] According to some embodiments of the gas generator of the present invention, the ignition structure includes an ignition element and a ignition shell, the ignition shell contains a ignition propellant, the ignition element is connected to the ignition shell, and the ignition element is used to ignite the ignition propellant, the ignition propellant being adapted to diffuse into the gas generation chamber after ignition to ignite the gas generation structure.

[0010] According to some embodiments of the gas generator of the present invention, one end of the ignition shell is provided with a first mounting port, and the ignition element is installed at the first mounting port; And / or, the peripheral wall of the ignition shell is provided with a first gas transmission hole, and the ignition propellant is adapted to diffuse from the first gas transmission hole toward the gas generation chamber after ignition; And / or, the ignition shell is composed of two layers, an inner and an outer layer, and the ignition propellant is disposed inside the inner layer of the ignition shell.

[0011] According to some embodiments of the present invention, the gas generator further includes a mounting base, the housing is provided with a second mounting port, the mounting base is respectively installed and cooperated with the first mounting port and the second mounting port, the ignition element is mounted on the mounting base, and a sealing element is provided between the ignition element and the mounting base; And / or, there are multiple first air transmission holes, which are spaced apart and distributed on the peripheral wall of the fire transmission shell, so that the multiple first air transmission holes are respectively connected to at least two of the gas generation chambers. And / or, the outer and / or inner sides of the ignition shell are provided with a first sealing layer, the first sealing layer is used to seal the first gas transmission hole, and the ignition propellant is adapted to break through the first sealing layer after ignition.

[0012] According to some embodiments of the present invention, a gas generator is provided in the gas generation chamber, the gas generation structure is disposed in the filter, one end of the filter is connected to the ignition chamber, the peripheral wall of the filter is provided with filter holes, and the gas generated in the gas generation structure is adapted to flow outward from the filter holes to the gas outlet.

[0013] According to some embodiments of the gas generator of the present invention, the filter is provided with a sealing end cap at the end away from the ignition chamber, and the sealing end cap is press-fitted into the filter; And / or, the filter holes are multiple, and the multiple filter holes are spaced apart and distributed in the filter.

[0014] According to some embodiments of the present invention, the housing includes a central tube and at least two outer shells, the ignition chamber is formed inside the central tube, the central tube includes at least two connecting pipe portions, and at least two outer shells are connected to at least two connecting pipe portions in a one-to-one correspondence to form at least two gas generating chambers; And / or, the inner side of the housing is provided with a second sealing layer, the second sealing layer is used to seal the vent, and the gas generated by the gas generating structure is suitable for breaking through the second sealing layer.

[0015] The present invention also proposes a vehicle.

[0016] A vehicle according to an embodiment of the present invention includes an airbag, the airbag comprising a gas generator and an air bag as described in any of the above embodiments, the air bag being in communication with the air outlet.

[0017] The gas generator and the aforementioned vehicle have the same advantages over existing technologies, which will not be repeated here.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a gas generator according to some embodiments of the present invention. Figure 1 ; Figure 2 This is a cross-sectional view of a gas generator according to some embodiments of the present invention; Figure 3 yes Figure 2 Enlarged view at point A; Figure 4 This is a schematic diagram of the structure of a gas generator according to some embodiments of the invention. Figure 2 ; Figure 5 This is a structural schematic diagram of the center tube, mounting base, and ignition structure according to some embodiments of the invention; Figure 6 This is a structural schematic diagram of the mounting base and ignition structure according to some embodiments of the invention; Figure 7 This is a schematic diagram of the structure of the sealing end cap according to some embodiments of the invention. Figure 1 ; Figure 8 This is a schematic diagram of the structure of the sealing end cap according to some embodiments of the invention. Figure 2 ; Figure 9 This is a structural schematic diagram of the central tube according to some embodiments of the invention; Figure 10 This is a cross-sectional view of the central tube according to some embodiments of the invention; Figure 11 This is step one of the assembly steps of the gas generator according to some embodiments of the invention; Figure 12 This is step two of the assembly process for the gas generator according to some embodiments of the invention; Figure 13 This is step three of the assembly process for the gas generator according to some embodiments of the invention; Figure 14 This is assembly step four of the gas generator according to some embodiments of the invention; Figure 15 This is step five of the assembly process for the gas generator according to some embodiments of the invention; Figure 16 This is step six of the assembly process for a gas generator according to some embodiments of the invention; Figure 17 This is assembly step seven of the gas generator according to some embodiments of the invention; Figure 18 This is assembly step eight of the gas generator according to some embodiments of the invention; Figure 19 This is assembly step nine of the gas generator according to some embodiments of the invention; Figure 20 This is a cross-sectional view of a gas generator according to other embodiments of the invention; Figure 21 This is a structural schematic diagram of the center tube, mounting base, and ignition structure according to other embodiments of the invention; Figure 22This is a schematic diagram of the structure of the fire-transfer shell according to other embodiments of the invention; Figure 23 This is a schematic diagram of the structure of a gas generator according to some embodiments of the invention; Figure 24 This is a cross-sectional view of a gas generator according to some embodiments of the invention; Figure 25 This is a schematic diagram of the structure of the fire-transfer shell according to some embodiments of the invention; Figure 26 This is a cross-sectional view of the fire-transfer shell according to some embodiments of the invention; Figure 27 This is a schematic diagram of the structure of the central tube according to some embodiments of the invention; Figure 28 This is a cross-sectional view of the central tube according to some embodiments of the invention; Figure 29 This is a schematic diagram of the structure of the casing according to some embodiments of the invention. Figure 1 ; Figure 30 This is a schematic diagram of the structure of the casing according to some embodiments of the invention. Figure 2 ; Figure 31 This is a cross-sectional view of the casing according to some embodiments of the invention; Figure 32 This is step one of the assembly steps of the gas generator according to some embodiments of the invention; Figure 33 This is step two of the assembly of the gas generator according to some embodiments of the invention; Figure 34 This is step three of the assembly of the gas generator according to some embodiments of the invention; Figure 35 This is step four of the assembly process for the gas generator according to some embodiments of the invention; Figure 36 This is step five of the assembly process for the gas generator according to some embodiments of the invention; Figure 37 This is step six of the assembly process for the gas generator according to some embodiments of the invention; Figure 38 This is step seven of the assembly process for the gas generator according to some embodiments of the invention; Figure 39 This is step eight of the assembly process for a gas generator according to some embodiments of the invention.

[0020] Figure label: Gas generator 100, Housing 1, ignition chamber 11, gas generation chamber 12, gas outlet 121, second mounting port 122, central tube 13, connecting pipe section 131, outer shell 14. Ignition structure 2, ignition element 21, flame transmission shell 22, first mounting port 221, first gas transmission port 222, ignition charge 223 Inner fire-transmitting shell 224, inner fire-transmitting shell 2241, inner fire-transmitting cover 2242, outer fire-transmitting shell 225. Gas-generating structure 3, mounting base 4, filter 5, sealing end cap 6, press-fit flange 61, connector 7. Seal 51, first sealing layer 52, second sealing layer 53, airflow gap 54. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Unless otherwise specified, the front-back direction in this application refers to the longitudinal direction of the vehicle, i.e., the Y-direction; the left-right direction refers to the lateral direction of the vehicle, i.e., the X-direction; and the up-down direction refers to the vertical direction of the vehicle, i.e., the Z-direction.

[0024] The following is for reference. Figures 1-39A gas generator 100 according to an embodiment of the present invention is described. The gas generator 100 can improve the combustion efficiency of the gas generating structure 3, increase the gas generation efficiency and generation amount, and make the combustion more stable, thereby improving the deployment efficiency of the airbag, avoiding airbag deployment delay, and thus improving the protection effect for the occupants.

[0025] like Figures 1-39 As shown, a gas generator 100 according to an embodiment of the present invention is used to inflate an airbag, and the gas generator 100 includes a housing.

[0026] The gas generator 100 can generate gas, which can be discharged into the airbag to inflate it, thereby protecting the occupants. The gas generator 100 of this application can be a top-mounted type, meaning it can be installed on or near the top of the vehicle to inflate the top-mounted airbag. In the event of a collision, the top-mounted gas generator 100 can rapidly release gas, allowing the airbag to deploy quickly downwards from the roof, forming a safety barrier to prevent direct collision between the occupants' heads and chests and the vehicle structure (such as the dashboard and steering wheel), thus reducing the risk of upper body injury.

[0027] The gas generator 100 includes a housing 1, which is the external structure of the gas generator 100. The housing 1 provides support and fixation for the internal components (ignition structure 2, gas generation structure 3, etc.), allowing the internal components to be installed in fixed, preset positions to prevent positional displacement and damage during gas release due to vibration or impact. The housing 1 also isolates the internal components from the external environment, effectively protecting them from external corrosion and damage. Simultaneously, the housing 1 provides a sealed cavity environment for gas generation, preventing gas leakage in non-triggered states and ensuring the reliability and safety of the gas generator 100.

[0028] The shell 1 contains an ignition chamber 11 and a gas-generating chamber 12. The ignition chamber 11 contains an ignition structure 2, and the gas-generating chamber 12 contains a gas-generating structure 3. In other words, the shell 1 is hollow, forming a cavity. The cavity includes the ignition chamber 11 and the gas-generating chamber 12. The ignition chamber 11 is used for ignition, and the gas-generating chamber 12 is used for gas generation. The ignition structure 2, which can be an electric igniter, is located inside the ignition chamber 11. The gas-generating structure 3, which can be a gas-generating agent, is located inside the gas-generating chamber 12. Upon receiving an electrical signal, the ignition structure 2 ignites the gas-generating structure 3, which then produces a large amount of gas.

[0029] Furthermore, there are at least two gas-generating chambers 12, which are respectively connected to the ignition chamber 11. The ignition structure 2 is used to ignite the gas-generating structures 3 in the at least two gas-generating chambers 12 so that the at least two gas-generating chambers 12 produce gas together. Each gas-generating chamber 12 is provided with an air outlet 121 for communicating with the airbag.

[0030] Specifically, the gas-generating chambers 12 can be configured as two, three, four, or more, with at least two gas-generating chambers 12 respectively connected to the ignition chamber 11. That is, each gas-generating chamber 12 is connected to the ignition chamber 11 in a one-to-one correspondence. In this way, when the ignition structure 2 is triggered, the high-temperature flame and shock wave generated after the ignition structure 2 is ignited can enter at least two gas-generating chambers 12, and at least two gas-generating structures 3 can be ignited simultaneously, so that high-temperature and high-pressure gas is generated in at least two gas-generating chambers 12, thereby improving combustion efficiency and increasing the gas generation efficiency and quantity. Since the ignition chamber 11 can be set between at least two gas-generating chambers 12, the airflow can diffuse from the ignition chamber 11 to the surrounding gas-generating chambers 12 at the same time, so that at least two surrounding gas-generating structures 3 burn outwards, thereby shortening the airflow path and enabling more rapid and uniform ignition of the gas-generating structures 3 in at least two gas-generating chambers 12, further improving combustion efficiency and making combustion more stable.

[0031] Each gas-generating chamber 12 is provided with a corresponding air outlet 121 for communicating with the airbag. In this way, the high-temperature and high-pressure gas generated in each gas-generating chamber 12 can be discharged into the airbag through the air outlet 121, so that the airbag expands and deploys, thereby protecting the occupants. Since the gas generated in at least two gas-generating chambers 12 is released into the airbag through the air outlet 121 at the same time, the deployment efficiency of the airbag can be improved, the airbag deployment delay can be avoided, and the protection effect on the occupants can be improved.

[0032] According to the gas generator 100 of the present invention, by setting at least two gas-generating chambers 12, each of which is connected to an ignition chamber 11, the high-temperature flame and shock wave generated after the ignition structure 2 in the ignition chamber 11 is ignited can enter the at least two gas-generating chambers 12, simultaneously igniting the at least two gas-generating structures 3, so that high-temperature and high-pressure gas is generated in the at least two gas-generating chambers 12. This can improve combustion efficiency, increase gas generation efficiency and quantity, and shorten the airflow path, enabling more rapid and uniform ignition of the gas-generating structures 3 in the at least two gas-generating chambers 12, further improving combustion efficiency and making combustion more stable. In addition, the gas generated in each gas-generating chamber 12 can be simultaneously released to the airbag through the air outlet 121, thereby improving the deployment efficiency of the airbag, avoiding airbag deployment delay, and thus improving the protection effect for the occupants.

[0033] In some embodiments, at least two gas-generating chambers 12 are distributed around the ignition chamber 11, and at least two gas-generating chambers 12 are respectively connected to the radial outer side of the ignition chamber 11.

[0034] Specifically, two, three, or more gas-generating chambers 12 can be arranged around the ignition chamber 11, that is, arranged on the outer periphery of the ignition chamber 11, and at least two gas-generating chambers 12 are respectively connected to the radial outer side of the ignition chamber 11. That is, each gas-generating chamber 12 is connected to the ignition chamber 11 along the radial outer side of the ignition chamber 11, so that the high-temperature flame and shock wave generated by the ignition chamber 11 can be transmitted radially simultaneously and rapidly to each gas-generating chamber 12 to ignite the gas-generating structure 3 in each gas-generating chamber 12 and improve combustion efficiency.

[0035] like Figures 1-4 As shown, the ignition chamber 11 can be configured as a cylindrical cavity, and the gas generation chamber 12 can also be configured as a cylindrical cavity, so that the ignition chamber 11 and at least two gas generation chambers 12 can be formed into a multi-port structure similar to a three-way pipe, a four-way pipe, etc., to improve gas flow efficiency.

[0036] Therefore, by setting at least two gas-generating chambers 12 to be distributed around the ignition chamber 11, and at least two gas-generating chambers 12 to be respectively connected to the radial outer side of the ignition chamber 11, the flame can be rapidly transmitted along the circumference of the ignition chamber 11 to the surrounding gas-generating chambers 12, so as to quickly ignite multiple gas-generating structures 3, improve combustion efficiency, make combustion more stable, generate more sufficient gas, and make the airflow transmission channel shorter, so that the gas can be discharged to the airbag more quickly.

[0037] In some embodiments, there are two gas-generating chambers 12, which are directly opposite each other on the radial sides of the ignition chamber 11.

[0038] Specifically, such as Figure 2 , Figure 20 and Figure 24 As shown, two gas generating chambers 12 are provided, and the ignition chamber 11 is located between the two gas generating chambers 12. The two gas generating chambers 12 are directly opposite each other and connected to the radial sides of the ignition chamber 11, that is, the two gas generating chambers 12 are located on the same axis, and the two gas generating chambers 12 are respectively connected to the radial sides of the ignition chamber 11. In this way, it is not only beneficial to manufacture the gas generator 100, but also makes the gas generator 100 more adaptable to the deployment mode of the top-mounted airbag. That is, the two gas generating chambers 12 can be set along the width direction of the airbag, that is, the lateral extension of the vehicle, so that the airbag can be quickly deployed from top to bottom.

[0039] In some embodiments, the ignition structure 2 includes an ignition element 21 and a ignition shell 22. The ignition shell 22 contains a ignition propellant 223. The ignition element 21 is connected to the ignition shell 22 and is used to ignite the ignition propellant 223. The ignition propellant 223 is adapted to diffuse into the gas-generating chamber 12 after ignition to ignite the gas-generating structure 3.

[0040] Specifically, such as Figure 2 , Figure 20 and Figure 24 As shown, the ignition structure 2 includes an ignition element 21 and a ignition shell 22. The ignition shell 22 is hollow to form a receiving cavity, in which a ignition propellant 223 can be placed. The ignition element 21 can be an electric igniter, which generates a high-voltage spark through a circuit to ignite the ignition propellant 223. That is, the ignition element 21 ignites the ignition propellant 223. The ignition element 21 is connected to the ignition shell 22 to facilitate the rapid ignition of the ignition propellant 223. After the ignition element 21 is triggered and detonates, igniting the ignition propellant 223, the high-temperature and high-pressure flame and solid products generated by the combustion of the ignition propellant 223 will pass through the ignition shell 22, be sprayed circumferentially and diffuse into the gas-generating chamber 12 to ignite the gas-generating structure 3, causing the gas-generating structure 3 to generate a large amount of high-temperature and high-pressure gas.

[0041] Furthermore, by igniting multiple gas-generating structures 3 simultaneously through one ignition structure 2, the amount of ignition propellant 223 can be greatly reduced, thus lowering the cost of using ignition propellant 223.

[0042] In some embodiments, one end of the ignition housing 22 is provided with a first mounting port 221, and the ignition element 21 is installed at the first mounting port 221.

[0043] Specifically, such as Figure 6 As shown, one end of the ignition housing 22 is open to form a first mounting port 221. The ignition element 21 is installed at the first mounting port 221. Thus, the ignition element 21 is integrated with the ignition housing 22 for placing the ignition charge 223, making the ignition structure 2 modular as a whole. This can improve the ignition rate, facilitate the assembly of the ignition charge 223, and enhance safety.

[0044] In other embodiments, the peripheral wall of the ignition shell 22 is provided with a first gas transmission hole 222, and the ignition propellant 223 is adapted to diffuse from the first gas transmission hole 222 toward the gas generation chamber 12 after ignition.

[0045] Specifically, such as Figure 6 As shown, the peripheral wall of the flame transfer shell 22 is provided with a first air transfer hole 222 that penetrates radially, such as... Figure 2 and Figure 5As shown, the first gas transmission hole 222 connects the inner cavity of the ignition shell 22 with the gas generation chamber 12. In this way, after the ignition charge 223 is ignited, the generated high-temperature flame and shock wave will diffuse into the gas generation chamber 12 through the first gas transmission hole 222 to ignite the gas generation structure 3 in the gas generation chamber 12, thereby realizing the generation of gas.

[0046] Therefore, after the ignition charge 223 is ignited, it diffuses into the gas-generating chamber 12 through the first gas-transmitting hole 222. That is, the flame diffuses directly outward along the radial direction of the ignition shell 22 into the gas-generating chamber 12, which can improve the flame diffusion efficiency and the ignition efficiency of the gas-generating structure 3.

[0047] The shape of the first air passage 222 is not limited. For example, the first air passage 222 can be set as a circle, ellipse, rectangle or other shapes, and can be flexibly set according to actual needs.

[0048] In other embodiments, the ignition shell 22 consists of two layers, an inner and an outer layer, and the ignition propellant 223 is disposed inside the inner ignition shell.

[0049] In other words, the ignition shell 22 can be configured as two layers, namely an inner ignition shell and an outer ignition shell. The two ignition shells can be nested sequentially from the inside out, that is, the outer ignition shell can be nested outside the inner ignition shell. The ignition propellant 223 can be placed inside the inner ignition shell. The inner cavity of the inner ignition shell can be configured as a closed cavity to maintain pressure, that is, to maintain the internal pressure of the ignition shell 22 is stable. The outer ignition shell is used to realize the propagation of flame and shock wave after ignition. In other words, the inner ignition shell can be configured as a closed cavity, and the outer ignition shell can be provided with a first gas transmission hole 222.

[0050] After the ignition charge 223 is ignited, the pressure-holding effect of the inner ignition shell allows the ignition charge 223 to concentrate its combustion energy, resulting in more complete combustion and a longer flame. The flame and shock wave generated by the combustion then break through the inner ignition shell and diffuse through the outer ignition shell into the gas-generating chamber 12, quickly igniting the gas-generating structure 3, reducing energy loss, and thus accelerating the response speed of the airbag. At the same time, the sealed chamber can also reduce the interference of other chambers on the combustion process of the ignition charge 223, making the combustion of the ignition charge 223 more uniform and stable, and improving the ignition reliability.

[0051] In a specific embodiment, such as Figure 21As shown, the flame-transfer shell 22 consists of two nested layers: an inner flame-transfer shell 224 and an outer flame-transfer shell 225. The inner flame-transfer shell 224 can be made of aluminum, which improves the pressure-holding effect and allows the flame to be released from the first vent 222 of the outer flame-transfer shell 225 with relatively stable pressure. The outer flame-transfer shell 225 can be made of steel. Steel has good mechanical properties and can withstand the high-temperature and high-pressure impact generated by the combustion of the propellant 223, preventing damage to the outer flame-transfer shell 225. By loading the propellant 223 into the inner flame-transfer shell 224, it is easy to assemble the inner flame-transfer shell 224 into the outer flame-transfer shell 225, saving costs.

[0052] The inner ignition housing 224 may include an inner ignition housing 2241 and an inner ignition cover 2242. The inner ignition housing 2241 is connected to the ignition element 21. The inner ignition cover 2242 covers the open end of the inner ignition housing 2241 to form a closed cavity. The propellant 223 is placed inside the inner ignition housing 224. The outer ignition housing 225 is fitted over the inner ignition housing 224, and the peripheral and bottom walls of the outer ignition housing 225 are provided with first gas transmission holes 222. The top of the inner ignition housing 224 is fitted with the bottom of the ignition element 21. After the ignition element 21 is ignited, the spark will break through the opening at the installation joint between the inner flame-transfer shell 224 and the ignition element 21, and then the spark of the ignition element 21 will enter the inner flame-transfer shell 224 to ignite the propellant 223. After the propellant 223 is ignited, a certain pressure will accumulate in the inner flame-transfer shell 244. Since the inner flame-transfer shell 224 is restricted by the outer flame-transfer shell 255, the weaker aluminum inner flame-transfer shell 244 will only break through from the first gas transmission hole 222, and high-temperature flames and shock waves will be ejected from the break and diffuse into the gas-generating chamber 12.

[0053] In addition, such as Figure 20 As shown, due to the pressure-holding effect of the inner ignition shell 22, there is no need to set a sealing layer on the peripheral wall of the inner ignition shell 22, thereby reducing material costs. While ensuring sufficient charge of the ignition propellant 223, it is beneficial to reduce the volume of the ignition shell 22, thus reducing the volume occupied by the ignition shell 22 within the ignition chamber 11. This allows at least a portion of the ignition chamber 11 to be constructed as a gas-generating chamber 12, enabling at least a portion of the ignition chamber 11 to be equipped with a gas-generating structure 3, increasing the volume of the gas-generating structure 3, and thereby increasing the amount of gas generated. Figure 20 As shown, the high-temperature flame and shock wave can diffuse radially along the outer flame shell 225 to the two gas-generating chambers 12 on both sides of the radial direction to ignite the gas-generating structures 3 on both sides of the radial direction. They can also diffuse axially from the bottom of the outer flame shell 22 to the bottom ignition chamber 11 to ignite the bottom gas-generating structure 3.

[0054] In some embodiments, the gas generator 100 further includes a mounting base 4, the housing is provided with a second mounting port 122, the mounting base 4 is installed and cooperates with the first mounting port 221 and the second mounting port 122 respectively, the ignition element 21 is installed on the mounting base 4, and a sealing element 51 is provided between the ignition element 21 and the mounting base 4.

[0055] Specifically, such as Figure 2 , Figure 20 and Figure 24 As shown, the gas generator 100 also includes a mounting base 4, which is used to fix and mount the ignition element 21, such as... Figure 9 As shown, the housing 1 is provided with a second mounting port 122 that opens axially. The shape and size of the second mounting port 122 are adapted to the shape and size of the first mounting port 221 and the second mounting port 122. The mounting base 4 can be configured as a flange mount, such as... Figure 6 As shown, at least a portion of the mounting base 4 can extend into the first mounting port 221, and the flange face of the mounting base 4 can be pressed against and welded or screwed to the end face of the first mounting port 221. The outer peripheral wall of the mounting base 4 can be pressed against and welded or screwed to the inner peripheral wall of the first mounting port 221 to achieve the installation fit between the mounting base 4 and the first mounting port 221, thereby fixing the mounting base 4 at the first mounting port 221. At the same time, the portion of the mounting base 4 extending into the first mounting port 221 also extends into the first mounting port 221, so that at least a portion of the outer peripheral wall of the mounting base 4 is tightly pressed against the inner peripheral wall of the second mounting port 122, and the outer peripheral wall of the second mounting port 122 can also be tightly pressed against the inner peripheral wall of the first mounting port 221, thereby achieving the installation fit between the mounting base 4 and the second mounting port 122.

[0056] The ignition element 21 is mounted on the mounting base 4 to achieve a fixed installation of the ignition element 21. During actual installation, the mounting base 4 and the ignition element 21 can be matched in a limiting fit to restrict the movement or displacement of the ignition element 21, preventing the ignition propellant 223 from igniting. Then, the ignition element 21 and the mounting base 4 can be riveted together to achieve a fixed connection. Furthermore, a sealing element 51 can be provided between the outer peripheral wall of the ignition element 21 and the inner peripheral wall of the mounting base 4. The sealing element 51 is tightly pressed against the outer peripheral wall of the ignition element 21 and the inner peripheral wall of the mounting base 4 to achieve a seal between the ignition element 21 and the mounting base 4, preventing gas leakage due to gaps between the ignition element 21 and the mounting base 4. The sealing element 51 can be constructed as a sealing ring.

[0057] In other embodiments, such as Figure 6 As shown, the inner diameter of the second mounting port 122 is larger than the inner diameter of the flame transfer housing 22. Therefore, the second mounting port 122 can be adapted to the size of the mounting base 4 for stable assembly with the mounting base 4, and as... Figure 21As shown, the second mounting port 122 can also be adapted to the size of the first mounting port 221, and can be stably assembled with the mounting base 4 and the first mounting port 221 at the same time, making the installation of the ignition shell 22 more stable and preventing the ignition shell 22 from detaching from the mounting base 4 due to excessive pressure when the ignition powder 223 is ignited.

[0058] In other embodiments, there are multiple first air transmission holes 222, which are spaced apart and distributed on the peripheral wall of the flame transmission shell 22, so that the multiple first air transmission holes 222 are respectively connected to at least two gas generation chambers 12.

[0059] Specifically, the first air transmission hole 222 can be set to two, three, four or even more. Multiple first air transmission holes 222 can be distributed at a certain distance on the peripheral wall of the fire transmission shell 22. Multiple first air transmission holes 222 are respectively connected to at least two gas generating chambers 12, that is, each gas generating chamber 12 is connected to a portion of the first air transmission holes 222.

[0060] Therefore, the high-temperature flame and shock wave generated when the propellant 223 is ignited can be rapidly diffused simultaneously at multiple locations through multiple first gas transmission holes 222 into at least two gas-generating chambers 12 to ignite the gas-generating structure 3 in at least two gas-generating chambers 12, thereby increasing the flame diffusion rate and improving the ignition efficiency of the gas-generating structure 3.

[0061] In a specific embodiment, such as Figure 2 , Figure 20 and Figure 24 As shown, when two gas-generating chambers 12 are provided, multiple first gas transmission holes 222 can be arranged symmetrically in the radial direction. The multiple first gas transmission holes 222 on both radial sides are respectively connected to the two gas-generating chambers 12, and as shown... Figure 25 As shown, the multiple first air passages 222 on the radial side can be configured in a long plum blossom shape to improve flame diffusion efficiency.

[0062] In other embodiments, the outer and / or inner sides of the ignition shell 22 are provided with a first sealing layer 52, which is used to seal the first gas transmission hole 222, and the ignition propellant 223 is adapted to break through the first sealing layer 52 after ignition.

[0063] In other words, a first sealing layer 52 can be provided on the outside of the flame transfer shell 22, or a first sealing layer 52 can be provided on the inside of the flame transfer shell 22, or a first sealing layer 52 can be provided on both the inside and outside of the flame transfer shell 22. The first sealing layer 52 can be provided in contact with the inner or outer peripheral wall of the flame transfer shell 22 to seal the first air transmission hole 222, so that the first air transmission hole 222 is not connected to the gas generation chamber 12.

[0064] Therefore, when the ignition element 21 is not triggered, the first vent 222 is closed, making the interior of the ignition shell 22 a sealed cavity. When the ignition element 21 is triggered and the ignition propellant 223 is ignited, the sealed cavity can provide pressure for the combustion of the ignition propellant 223, thereby making the ignition propellant 223 burn more completely and produce a longer flame, accelerating the response rate of the airbag. After the pressure in the sealed cavity reaches a certain value, the flame and shock wave will break through the first sealing layer 52, so that the first vent 222 is connected to the gas generation chamber 12, and the flame can spread into the gas generation chamber 12.

[0065] In actual design, the first sealing layer 52 can be set as aluminum foil.

[0066] In other embodiments, such as Figure 2 and Figure 24 As shown, there is a gap between the bottom wall of the ignition shell 22 and the inner wall of the ignition chamber 11. This prevents the impact of the ignition propellant 223 during ignition from knocking the ignition shell 22 off, thereby causing unstable combustion of the gas-generating structure 3.

[0067] In some embodiments, a filter 5 is provided in the gas generating chamber 12, and a gas generating structure 3 is provided in the filter 5. One end of the filter 5 is connected to the ignition chamber 11. The peripheral wall of the filter 5 is provided with filter holes, and the gas generated in the gas generating structure 3 is suitable for flowing outward from the filter holes to the gas outlet 121.

[0068] Specifically, such as Figure 2 , Figure 20 and Figure 24 As shown, a filter 5 is installed inside the gas-generating chamber 12. The filter 5 is used to filter the solid residue generated during the combustion of the gas-generating structure 3. The gas-generating structure 3 is installed inside the filter 5. The filter 5 is adapted to the shape of the gas-generating chamber 12 and can be set as a cylinder and fitted inside the gas-generating chamber 12. One end of the filter 5 can be connected to the ignition chamber 11. In this way, the high-temperature flame and shock wave generated after the ignition chamber 11 is ignited can diffuse into the filter 5 and ignite the gas-generating structure 3 inside the filter 5 to generate a large amount of gas. The peripheral wall of the filter 5 is provided with filter holes. The gas can pass through the filter holes to filter the residue and then flow outward to the gas outlet 121, and is discharged to the airbag through the gas outlet 121.

[0069] Therefore, by effectively filtering the solid residue in the gas generation process through the filter 5 inside the gas generation chamber 12, it is possible to effectively prevent the gas outlet 121 from being blocked by solid residue, thereby ensuring that the gas is quickly discharged to the safety airbag through the gas outlet 121, and improving the working reliability of the gas generator 100.

[0070] It should be noted that the gas generating chamber 12 of the gas generator 100 of the present invention has a large radial dimension. It only installs the filter 5, which can reserve more space for the gas generating structure 3 to install more gas generating structures 3 and increase the amount of chemical charge in the gas generating structure 3. At the same time, in conjunction with the circumferential filtration effect of the filter 5, the filter residue effect is improved.

[0071] In actual design, the filter 5 can be press-fitted into the gas generation chamber 12, that is, the outer peripheral wall of the filter 5 can be tightly pressed against the inner peripheral wall of the gas generation chamber 12 to fix the filter 5 and prevent the filter 5 from shaking. The filter 5 can be press-fitted to one end to contact the ignition shell 22.

[0072] In some embodiments, the filter 5 is provided with a sealing end cap 6 at the end away from the ignition chamber 11, and the sealing end cap 6 is press-fitted into the filter 5.

[0073] Specifically, such as Figure 2 and Figure 4 As shown, the filter 5 is open at both ends along its axis. A sealing end cap 6 is provided at the end of the filter 5 away from the ignition chamber 11. The sealing end cap 6 is adapted to the end face shape and size of the filter 5, and a press-fit flange 61 is provided on the outer periphery of the sealing end cap 6. The outer diameter of the press-fit flange 61 of the sealing end cap 6 can be set to be larger than the inner diameter of the inner peripheral wall of the filter 5, so that the sealing end cap 6 is pressed into the filter 5 by external force, so that the press-fit flange 61 is tightly pressed against the inner peripheral wall of the filter 5, generating radial pressure, thereby fixing the relative position of the filter 5 and the sealing end cap 6. Thus, the sealing end cap 6 is press-fitted into the filter 5, preventing the sealing end cap 6 from shifting or shaking.

[0074] Among them, by providing a press-fit flange 61 on the outer periphery of the sealing end cover 6 and tightly connecting it with the filter 5, the press-fit flange 61 can withstand a larger interference and can better hook the filter 5, thereby improving the connection stability and reliability between the sealing end cover 6 and the filter 5.

[0075] Furthermore, the amount of gas-generating structure 3 that can be installed can be adjusted by changing the depth to which the sealing end cap 6 is pressed into the filter 5. This changes the size of the drug chamber volume defined by the filter 5, sealing end cap 6, and ignition shell 22. For example, when the demand for gas-generating structure 3 is small, the depth to which the sealing end cap 6 is pressed into the filter 5 can be set deeper; when the demand for gas-generating structure 3 is large, the depth can be set shallower. This effectively fixes the gas-generating structure 3, preventing it from shaking or breaking and affecting gas output. It can also be used to match safety airbags with different gas volumes. Simultaneously, when the gas-generating structure 3 is ignited and produces gas, the sealing end cap 6 also acts as a barrier, blocking gas and residue. This guides the gas, allowing it to flow through the filter holes on the peripheral wall of the filter 5 to the outlet 121, and prevents residue from being discharged into the outlet 121, thus affecting gas output.

[0076] It should be noted that the length of the outer shell 14 and the length of the filter 5 can be flexibly adjusted according to the actual situation to increase the installation space of the gas production structure 3, thereby matching airbags with different gas volumes.

[0077] In other embodiments, there are multiple filter holes, and the multiple filter holes are spaced apart and distributed in the filter 5.

[0078] Specifically, the filter holes can be set to two, three, four or even more. Multiple filter holes can be distributed at a certain distance on the periphery of the filter 5. Thus, the residue can be filtered through the combined filtration effect of multiple filter holes, improving the filtration effect and preventing the air outlet 121 from being blocked by residue.

[0079] In other embodiments, an airflow gap 54 is formed between the outer peripheral wall of the filter 5 and the inner peripheral wall of the gas generation chamber 12.

[0080] Specifically, such as Figure 2 , Figure 20 and Figure 24 As shown, the outer peripheral wall of the filter 5 and the inner peripheral wall of the gas generation chamber 12 are spaced apart by a certain distance to form an annular airflow gap 54. In this way, the gas generated by the gas generation structure 3 can flow into the airflow gap 54 after passing through the filter hole. The airflow gap 54 is connected to the air outlet 121. Then the gas can flow from the airflow gap 54 to the air outlet 121 and be discharged from the air outlet 121 to the airbag. In this way, the gas is discharged in a directional manner, which allows the airbag to inflate in a specified direction.

[0081] In some embodiments, the housing includes a central tube 13 and at least two outer shells 14. An ignition chamber 11 is formed inside the central tube 13. The central tube 13 includes at least two connecting pipe portions 131. At least two outer shells 14 are connected to at least two connecting pipe portions 131 in a one-to-one correspondence to form at least two gas-generating chambers 12.

[0082] In other words, the housing may include a central tube 13 and two, three or more outer shells 14. An ignition chamber 11 is formed inside the central tube 13. The number of outer shells 14 corresponds to the number of gas-generating chambers 12. The central tube 13 includes two, three or more connecting pipe sections 131. The connecting pipe sections 131 are used to connect the outer shells 14. That is, the number of connecting pipe sections 131 corresponds to the number of gas-generating chambers 12. One outer shell 14 is connected to one connecting pipe section 131 to form one gas-generating chamber 12. The vent 121 may be opened on the central tube 13 or the outer shell 14.

[0083] Therefore, during assembly, the ignition structure 2 and mounting base 4 can be assembled to the central tube 13 first, then the filter 5 can be assembled and the gas generating structure 3 can be installed, so that the gas generating agent is installed in multiple gas generating chambers 12, and the gas generating agent can be assembled. After that, the outer shell 14 can be connected to the connecting pipe 131 to achieve the sealed assembly of the entire gas generator 100. The entire assembly process is easy and efficient, which can improve production efficiency.

[0084] In actual design, at least two connecting pipe sections 131 can be welded to the outer casing 14 to improve the reliability and stability of the connection between the central pipe 13 and the outer casing 14.

[0085] In some specific embodiments, such as Figure 2 As shown, when two outer shells 14 are provided, the radial dimension of the connecting pipe 131 can be set to be the same as the radial dimension of the outer shell 14, so that the end face of the connecting pipe 131 is connected to the end face of the outer shell 14. The radial dimension of the connecting pipe 131 is larger than that of the central pipe 13, thereby increasing the diameter of the connecting pipe 131. This increases the size of the airflow gap 54, improves the gas flow efficiency, enhances the exhaust performance of the gas generator 100, effectively prevents the problem of gas flow failure caused by residue blockage, and avoids excessive flames. In this embodiment, the air outlet 121 is opened on the connecting pipe 131, and the filter 5 is interference-fitted with the central pipe 13.

[0086] like Figures 11-19As shown, during assembly, the ignition structure 2 and mounting base 4 can be assembled to the central tube 13 first. Then, the filter 5 is installed at the end of the central tube 13. A sealing end cap 6 is installed at the end of one filter 5, while the other filter 5 is not fitted with a sealing end cap 6. At this time, the gas generating structure 3, i.e., the gas generating agent, can be inserted into the filter 5 from the open end of the filter 5 without the sealing end cap 6. When the gas generating agent enters the interior of each filter 5, it needs to pass through the ignition shell 22. The slender ignition shell 22 can collide with the gas generating agent with a small volume, so that the gas generating agent can enter the interior of each filter 5, avoiding the gas generating agent from being stuck during loading. This achieves the installation of gas generating agent in multiple gas generating chambers 12. After that, the sealing end cap 6 can be installed on the other filter 5. Then, the outer shell 14 can be connected to the connecting pipe 131 to achieve the sealed assembly of the entire gas generator 100. The entire assembly process is simple, efficient, and can improve production efficiency.

[0087] In other specific embodiments, such as Figure 20 As shown, when two outer shells 14 are provided, the radial dimension of the connecting pipe 131 can be set to be smaller than the radial dimension of the outer shell 14, so that at least part of the outer peripheral wall of the connecting pipe 131 is in close contact with the inner peripheral wall of the outer shell 14. This helps to reduce material costs, improve the dimensional accuracy of the connecting pipe 131, improve assembly accuracy, and the width of the airflow gap 54 is the wall thickness of the connecting pipe 131, which can increase the airflow gap 54 and improve the exhaust effect.

[0088] like Figures 32-39 As shown, during assembly, the ignition structure 2 and mounting base 4 can be assembled to the central tube 13 first. Then, a filter 5 is installed at the end of the central tube 13. The connecting pipe 131 on one side is connected to a housing 14 to seal one filter 5. At this time, the gas generating structure 3, i.e., the gas generating agent, can be inserted into the filter 5 from the opening end of the other filter 5. Then, the other housing 14 can be connected to the connecting pipe 131 on the other side to achieve a sealed assembly of the entire gas generator 100. The entire assembly process is simple and efficient, which can improve production efficiency. In this embodiment, the gas outlet 121 is opened on the housing 14, and the filter 5 is press-fitted with both the housing 14 and the central tube 13.

[0089] In other specific embodiments, such as Figure 24As shown, when two outer shells 14 are provided, the radial dimension of the connecting pipe portion 131 can be set to be larger than the radial dimension of the outer shell 14, so that at least part of the inner peripheral wall of the connecting pipe portion 131 is in close contact with the outer peripheral wall of the outer shell 14. The radial dimension of the connecting pipe portion 131 is larger than that of the central pipe 13, so as to expand the diameter of the connecting pipe portion 131. In this way, the size of the central pipe 13 can be reduced, which is beneficial to the manufacture of the central pipe 13 and reduces the cost. In this embodiment, the air outlet 121 is opened on the outer shell 14 to further reduce the manufacturing difficulty of the central pipe 13. The filter 5 is interference-fitted with the central pipe 13. The assembly method of this embodiment is the same as that of the above embodiment, and will not be described again here.

[0090] In some other embodiments, a second sealing layer 53 is provided on the inner side of the housing 1. The second sealing layer 53 is used to seal the vent 121, and the gas generated by the gas generating structure 3 is suitable for breaking through the second sealing layer 53.

[0091] In other words, a second sealing layer 53 can be provided on the inner side of the housing 1 to seal the vent 121, so that the vent 121 is not connected to the airbag. Thus, when the gas generating structure 3 is not burning, the vent 121 is sealed by the second sealing layer 53, making the gas generating chamber 12 a sealed chamber that is not connected to the airbag. When the gas generating structure 3 is ignited and burned, the large amount of gas generated by the gas generating structure 3 will break through the second sealing layer 53, so that the vent 121 is connected to the airbag, and the gas can be discharged into the airbag to fill it.

[0092] In actual design, the second sealing layer 53 can be set as aluminum foil.

[0093] In other embodiments, such as Figure 1 As shown, the outer casing 14 is connected to a connector 7. The connector 7 can be constructed as a stud, which can be welded to the outer casing 14 to improve the reliability and stability of the connection between the stud and the outer casing 14. Of course, the connector 7 can also be constructed as a buckle, a slot, a protrusion, a screw, etc. The connector 7 can be connected to the airbag, thereby realizing a reliable connection between the gas generator 100 and the airbag.

[0094] The working principle of the gas generator 100 of the present invention is as follows: the ignition element 21 is triggered, the ignition element 21 ignites the ignition propellant 223, the shock wave generated by the combustion of the ignition propellant 223 breaks through the first sealing layer 52 on the ignition shell 22, and sprays high-energy flames in all directions. It diffuses into the gas generation chamber 12 through the first gas transmission hole 222, igniting the gas generation structure 3. The gas generation structure 3 burns from one end near the ignition chamber 11 to the other end away from the ignition chamber 11, that is, the gas generation structure 3 burns from the middle to both ends, generating a large amount of gas. The gas passes through the filter 5 through the filter hole and moves towards the gas outlet 121. At the same time, a large amount of residue generated by the combustion of the gas generation structure 3 and the ignition propellant 223 is filtered in the filter 5. When the pressure in the gas generation chamber 12 reaches a certain value, the gas breaks through the second sealing layer and enters the airbag to fill the airbag.

[0095] The present invention also proposes a vehicle.

[0096] The vehicle according to an embodiment of the present invention includes an airbag, the airbag including a gas generator 100 and an air bag according to any embodiment, the air bag being in communication with an air outlet 121.

[0097] Specifically, when a vehicle collision occurs, the collision sensor is triggered, and the gas generator 100 is activated, rapidly generating a large amount of gas. The gas is discharged from the vent 121 into the air bag, causing the air bag to inflate rapidly and form a soft cushioning structure to absorb the impact energy between the occupant and hard objects inside the vehicle, reducing the risk of upper body injury.

[0098] The gas generator 100 described above can increase the inflation speed of the airbag, improve the response speed of the airbag, provide timely and effective protection for the occupants, and enhance the protection effect for the occupants.

[0099] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0100] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gas generator, characterized in that, The gas generator is used to inflate the airbag, and the gas generator includes: The housing (1) has an ignition chamber (11) and a gas generation chamber (12) formed inside it. The ignition chamber (11) is provided with an ignition structure (2), and the gas generation chamber (12) is provided with a gas generation structure (3). There are at least two gas-generating chambers (12), and the at least two gas-generating chambers (12) are respectively connected to the ignition chamber (11). The ignition structure (2) is used to ignite the gas-generating structure (3) in the at least two gas-generating chambers (12) so that the at least two gas-generating chambers (12) produce gas together. Each gas-generating chamber (12) is provided with an air outlet (121) for communicating with the airbag.

2. The gas generator according to claim 1, characterized in that, At least two of the gas-generating chambers (12) are distributed around the ignition chamber (11), and at least two of the gas-generating chambers (12) are respectively connected to the radial outer side of the ignition chamber (11).

3. The gas generator according to claim 2, characterized in that, There are two gas-generating chambers (12), which are directly opposite each other on the radial sides of the ignition chamber (11).

4. The gas generator according to any one of claims 1-3, characterized in that, The ignition structure (2) includes an ignition element (21) and a ignition shell (22). The ignition shell (22) contains a ignition propellant (223). The ignition element (21) is connected to the ignition shell (22) and is used to ignite the ignition propellant (223). The ignition propellant (223) is adapted to diffuse into the gas-generating chamber (12) after ignition to ignite the gas-generating structure (3).

5. The gas generator according to claim 4, characterized in that, The ignition housing (22) has a first mounting port (221) at one end, and the ignition element (21) is installed at the first mounting port (221); And / or, the peripheral wall of the ignition shell (22) is provided with a first gas transmission hole (222), and the ignition propellant (223) is adapted to diffuse from the first gas transmission hole (222) toward the gas generation chamber (12) after ignition; And / or, the ignition shell (22) is composed of two layers, an inner and an outer layer, and the ignition propellant (223) is disposed in the inner layer of the ignition shell.

6. The gas generator according to claim 5, characterized in that, It also includes a mounting base (4), the housing is provided with a second mounting port (122), the mounting base (4) is installed and cooperated with the first mounting port (221) and the second mounting port (122) respectively, the ignition element (21) is installed on the mounting base (4), and a sealing element (51) is provided between the ignition element (21) and the mounting base (4). And / or, there are multiple first air transmission holes (222), and the multiple first air transmission holes (222) are spaced apart and distributed on the peripheral wall of the fire transmission shell (22), so that the multiple first air transmission holes (222) are respectively connected to at least two of the gas generation chambers (12); And / or, the outer and / or inner sides of the ignition shell (22) are provided with a first sealing layer (52), the first sealing layer (52) is used to seal the first gas transmission hole (222), and the ignition propellant (223) is adapted to break through the first sealing layer (52) after ignition.

7. The gas generator according to any one of claims 1-3, characterized in that, The gas generating chamber (12) is provided with a filter (5), and the gas generating structure (3) is provided in the filter (5). One end of the filter (5) is connected to the ignition chamber (11). The peripheral wall of the filter (5) is provided with filter holes. The gas generated by the gas generating structure (3) is suitable to flow outward from the filter holes to the gas outlet (121).

8. The gas generator according to claim 7, characterized in that, The filter (5) has a sealing end cap (6) at one end away from the ignition chamber (11), and the sealing end cap (6) is press-fitted into the filter (5); And / or, there are multiple filter holes, and the multiple filter holes are spaced apart and distributed in the filter (5).

9. The gas generator according to any one of claims 1-3, characterized in that, The housing (1) includes a central tube (13) and at least two outer shells (14). The ignition chamber (11) is formed inside the central tube (13). The central tube (13) includes at least two connecting pipe sections (131). At least two outer shells (14) are connected to at least two connecting pipe sections (131) in a one-to-one correspondence to form at least two gas-generating chambers (12). And / or, the inner side of the housing (1) is provided with a second sealing layer (53), the second sealing layer (53) is used to seal the air outlet (121), and the gas generated by the gas generating structure (3) is suitable to break through the second sealing layer (53).

10. A vehicle, characterized in that, Includes an airbag, the airbag comprising a gas generator and an air bag as described in any one of claims 1-9, the air bag being in communication with the air outlet (121).

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