Igniter, gas generating device, safety airbag system and vehicle

Abstract

The utility model provides an igniter, a gas generating device, a safety airbag system and a vehicle. The electric fire device comprises an ignition chamber and at least two adjusting pieces, the ignition chamber is provided with a first combustion space used for igniting fuel, one side of each adjusting piece is connected with the ignition chamber, the other side of each adjusting piece is used for being connected with a combustion chamber, and the combustion chambers connected with the adjusting pieces are different. The combustion chamber is provided with a second combustion space for fuel combustion. The adjusting part is arranged, one side of the adjusting part is connected with the ignition chamber, the other side of the adjusting part is used for being connected with the combustion chamber, the space in each combustion chamber is separated from the space in the fire chamber, and therefore ignition fuel in the ignition chamber and gas production fuel in the combustion chamber are separated; the risk that gas production fuel in the combustion chamber is triggered by mistake is reduced, so that the ignition reliability is improved, and the use hidden danger of the gas generation device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an igniter, a gas generating device, an airbag system and a vehicle. BACKGROUND

[0002] A vehicle is usually provided with a gas generating device to generate gas for inflating an airbag when the vehicle collides. At present, the gas generating fuel in the combustion chamber has a risk of being triggered by mistake, which causes the gas generating device to have a hidden danger in use. CONTENT

[0003] Embodiments of the present application provide an igniter, a gas generating device, an airbag system and a vehicle to improve the ignition reliability and reduce the hidden danger in use of the gas generating device.

[0004] In order to achieve the above-mentioned purpose, according to a first aspect of the present application, an igniter is provided, comprising an ignition chamber and at least two adjusting members, the ignition chamber has a first combustion space for igniting fuel, one side of each of the adjusting members is connected with the ignition chamber, the other side of each of the adjusting members is used for connecting with a combustion chamber, and the combustion chamber connected with each of the adjusting members is different, and the combustion chamber has a second combustion space for fuel combustion.

[0005] In a possible implementation manner, the first combustion space comprises a first space and a second space, the first space is communicated with the second space, and one side of each of the adjusting members is connected with the first space.

[0006] In a possible implementation manner, the ignition chamber comprises a first shell and a second shell connected with each other, the first space is located in the first shell, and the second space is located between the first shell and the second shell.

[0007] In a possible implementation manner, the first shell is in a cylindrical shape.

[0008] In a possible implementation manner, the second shell is sleeved on the first shell.

[0009] In a possible implementation manner, the first shell is provided with an ignition passage, and the first space and the second space are communicated through the ignition passage.

[0010] In a possible implementation manner, a plurality of ignition passages are provided, the plurality of ignition passages are arranged at intervals along the axial direction of the first shell, and at least one of the plurality of ignition passages is configured to communicate the first space with the second space.

[0011] In a possible implementation, the plurality of ignition channels are arranged at intervals around the circumference of the first shell, and the second shell is configured to rotate relative to the first shell so as to connect one of the plurality of ignition channels to the first space and the second space.

[0012] In a possible implementation, the ignition channel comprises a plurality of sub-channels, and each of the plurality of sub-channels connects the first space and the second space.

[0013] In a possible implementation, at least one of the two adjustment members is movably connected to the ignition chamber.

[0014] In a possible implementation, the at least two adjustment members comprise a first adjustment member and a second adjustment member, and the first adjustment member and the second adjustment member are arranged at intervals in the first shell.

[0015] In a possible implementation, the first adjustment member and the second adjustment member are arranged on opposite sides of the ignition chamber.

[0016] In a possible implementation, the adjustment member comprises an on-off part for adjusting the on-off between the first combustion space and the second combustion space.

[0017] In a possible implementation, the igniter further comprises an ignition member connected to the ignition chamber for igniting the fuel in the ignition chamber.

[0018] According to a second aspect of the present application, a gas generating device is provided, comprising the igniter of any one of the embodiments of the first aspect.

[0019] In a possible implementation, the gas generating device further comprises a first combustion chamber and a second combustion chamber, and the igniter is located between the first combustion chamber and the second combustion chamber.

[0020] In a possible implementation, the first combustion chamber has a third space, the second combustion chamber has a fourth space, one of the two adjustment members is located between the third space and the first combustion space, and the other of the two adjustment members is located between the fourth space and the first combustion space.

[0021] In a possible implementation, the igniter is sleeved on the first combustion chamber and / or the second combustion chamber.

[0022] In a possible implementation, the gas generating device has a first gas outlet and a second gas outlet, the first gas outlet is located on a side of the first combustion chamber away from the igniter, and the second gas outlet is located on a side of the second combustion chamber away from the igniter.

[0023] In a possible implementation, the gas generating device further comprises a first filter arranged between the first gas outlet and the first adjusting member; and / or, the gas generating device further comprises a second filter arranged between the second gas outlet and the second adjusting member.

[0024] In a possible implementation, the gas generating device further comprises a first diffuser arranged at an end of the first combustion chamber away from the igniter; and / or, a second diffuser arranged at an end of the second combustion chamber away from the igniter.

[0025] According to a third aspect of the present application, there is provided a safety airbag system comprising the gas generating device of any of the third aspect.

[0026] According to a fourth aspect of the present application, there is provided a vehicle comprising the safety airbag system of any of the third aspect.

[0027] In the igniter of the embodiments of the present application, by arranging the adjusting member, and connecting one side of the adjusting member with the ignition chamber, and connecting the other side of the adjusting member with a combustion chamber, the space in each combustion chamber is separated from the space in the ignition chamber, so that the ignition fuel in the ignition chamber and the gas generating fuel in the combustion chamber are separated, which helps to reduce the risk of the gas generating fuel in the combustion chamber being triggered by mistake, thereby improving the ignition reliability and reducing the hidden danger of the gas generating device.

[0028] Other features and advantages of the present application will be described in detail in the following detailed description of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort.

[0030] Figure 1 FIG. 1 is a structural schematic diagram of a gas generating device according to an embodiment of the present application;

[0031] Figure 2 FIG. 2 is an explosion schematic diagram of the gas generating device according to the embodiment of the present application;

[0032] Figure 3 FIG. 3 is an internal structural schematic diagram of the gas generating device according to the embodiment of the present application;

[0033] Figure 4 FIG. 4 is a structural schematic diagram of an igniter according to an embodiment of the present application;

[0034] Figure 5 Fig. 1 is a structural schematic view of a first housing of an embodiment of the present application;

[0035] Figure 6 Fig. 2 is a structural schematic view of an adjusting member of an embodiment of the present application;

[0036] Figure 7 Fig. 3 is a front view of the adjusting member of an embodiment of the present application.

[0037] Legend of reference signs:

[0038] 100 - gas generating device; 10 - igniter; 1 - ignition chamber; 11 - first housing; 111 - ignition passage; 112 - sub-passage; 12 - second housing; 121 - mounting hole; 13a - first space; 13b - second space; 2 - adjusting member; 21 - on-off part; 2a - first adjusting member; 2b - second adjusting member; 3 - ignition member; 4 - ignition fuel; 20 - combustion chamber; 20a - first combustion chamber; 20a1 - first gas outlet; 20a2 - third space; 20b - second combustion chamber; 20b1 - second gas outlet; 20b2 - fourth space; 30 - first filter member; 40 - second filter member; 50 - first diffuser; 51 - first gas hole; 60 - second diffuser; 52 - second gas hole; 70 - gas generating fuel. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0040] According to a first aspect of the present application, an igniter 10 is provided, which is suitable for a gas generating device 100. Referring to Figures 1 to 3 The igniter 10 provided by the embodiments of the present application is suitable for the gas generating device 100 related structure. Exemplarily, the gas generating device 100 includes two combustion chambers 20 and the igniter 10, the igniter 10 is located between the two combustion chambers 20, the combustion chamber 20 has a space for fuel combustion, and the combustion space is used to accommodate the gas generating fuel 70. The igniter 10 is used to ignite the gas generating fuel 70. The igniter 10 can be connected to an ignition wire harness (not shown in the figure), and the ignition wire harness controls the igniter 10 to ignite the gas generating fuel 70 in the combustion chamber 20 in response to a collision signal of the vehicle, so as to inflate the airbag.

[0041] The igniter 10 of the embodiments of the present application will be described in detail below with reference to the drawings.

[0042] Referring toFigure 4 and with reference to Figure 2 and Figure 3 The igniter 10 comprises an ignition chamber 1 having a space for igniting a fuel, and at least two regulating members 2, one side of each regulating member 2 being connected with the ignition chamber 1, and the other side of each regulating member 2 being used for connecting with a combustion chamber 20, and each regulating member 2 being connected with different combustion chambers 20, the combustion chamber 20 having a space for burning the fuel.

[0043] It can be understood that the ignition chamber 1 has a first combustion space for containing and burning an ignition fuel 4. The ignition fuel 4 can include, but is not limited to, one or more of titanium hydride, guanidine nitrate, nitro guanidine, or triaminoguanidine nitrate, and pentaamino tetrazole or sodium salt of pentaamino tetrazole. In some embodiments, the ignition fuel 4 is gunpowder.

[0044] It can be understood that the combustion chamber 20 has a second combustion space for containing and burning a gas generating fuel 70. The gas generating fuel 70 can include, but is not limited to, one or more of sodium azide, various metal oxides, and sulfides.

[0045] The regulating member 2 is used to regulate the on-off between the ignition chamber 1 and the combustion chamber, in other words, the regulating member 2 regulates the on-off between the first combustion space and the second combustion space. When the vehicle is in a collision and needs to generate gas, the regulating member 2 communicates the space in the ignition chamber 1 with the space in the combustion chamber 20 to ignite the gas generating fuel 70. When the vehicle is not in a collision or other abnormal situation, the regulating member 2 separates the space in the ignition chamber 1 from the space in the combustion chamber 20 to avoid the gas generating fuel 70 being triggered by mistake.

[0046] The regulating member 2 can be directly connected with the combustion chamber 20, or indirectly connected with the combustion chamber 20.

[0047] The number of regulating members 2 corresponds to the number of combustion chambers 20.

[0048] Exemplarily, the regulating member 2 is provided with two, which are a first regulating member 2a and a second regulating member 2b, and correspondingly, the combustion chamber 20 is provided with two, which are a first combustion chamber 20a and a second combustion chamber 20b. The gas generating device 100 using the igniter 10 can be understood as a double-head gas generating device 100. The double-head gas generating device 100 can inflate the airbag in two directions. The single-head gas generating device 100 has low inflation efficiency, resulting in a large airbag, for example, a side curtain airbag, a far-end airbag, etc., the end far from the inflation port of which is inflated and lags behind, which causes the airbag to not inflate uniformly to protect the passenger when the vehicle is in a collision. Compared with the single-head gas generating device 100, the double-head gas generating device 100 can inflate the airbag in two directions, improve the inflation efficiency, and make the airbag inflate uniformly at both ends to protect the passenger.

[0049] In the embodiments of the present application, the adjusting member 2 is arranged, one side of the adjusting member 2 is connected with the ignition chamber 1, and the other side of the adjusting member 2 is arranged to be connected with a combustion chamber 20, so that the space in each combustion chamber 20 is separated from the space in the ignition chamber 1. In this way, the ignition fuel 4 in the ignition chamber 1 and the gas generating fuel 70 in the combustion chamber 20 are separated, which helps to reduce the risk of the gas generating fuel 70 in the combustion chamber 20 being triggered by mistake, thereby improving the ignition reliability and reducing the hidden danger of the gas generating device 100.

[0050] With reference to Figure 6 and Figure 7 In some embodiments, the first combustion chamber 20a has a third space 20a2, and the second combustion chamber 20b has a fourth space 20b2, the third space 20a2 and the fourth space 20b2 are used to provide combustion space for the gas generating fuel 70, and the third space 20a2 and the fourth space 20b2 can be understood as the second combustion space introduced above. The adjusting member 2 includes an on-off part 21, and the adjusting member 2 is used to adjust the on-off between the first combustion space and the second combustion space. The on-off part 21 on the first adjusting member 2 is used to adjust the on-off between the first combustion space and the third space 20a2, and the on-off part 21 on the second adjusting member 2 is used to adjust the on-off between the first combustion space and the fourth space 20b2.

[0051] The adjusting member 2 is arranged between the first combustion space and the second combustion space, one side of the adjusting member 2 is in contact with the first combustion space, and the other side of the adjusting member 2 is in contact with the second combustion space.

[0052] It can be understood that the first combustion space contains the ignition fuel 4, and the second combustion space contains the gas generating fuel 70.

[0053] The adjusting member 2 can be provided with a plurality of on-off parts 21, or can be provided with one on-off part 21. Exemplarily, as shown in Figure 6 and Figure 7 The adjusting member 2 is provided with a plurality of on-off parts 21, at least one of which is arranged at the center of the adjusting member 2, and the rest of which is arranged in a circular array around the center of the adjusting member 2.

[0054] The on-off part 21 can be a weak part or a notch structure arranged on the adjusting member 2.

[0055] The on-off part 21 can be configured to connect the two sides of the adjusting member 2 when the temperature or pressure reaches a threshold value, so as to connect the third space and / or the fourth space with the first combustion space.

[0056] In some embodiments, the on-off part 21 is configured to connect the two sides of the adjusting member 2 when the pressure in the ignition chamber 1 reaches a threshold value, so as to release the high-temperature substances generated by the combustion of the gas generating fuel 70 to the second combustion space, thereby igniting the gas generating fuel 70.

[0057] When the igniter 10 does not receive the ignition signal, the on-off part 21 is closed, the two sides of the adjusting member 2 are disconnected, and the ignition fuel 4 and the gas generating fuel 70 are isolated. When the igniter 10 receives the ignition signal, the ignition fuel 4 burns in the first combustion space to generate high-temperature and high-pressure gas, the pressure in the first combustion space rapidly rises to reach a threshold, the on-off part 21 is opened, the two sides of the adjusting member 2 are connected, the high-temperature substances generated by the combustion of the ignition fuel 4 diffuse into the second combustion space, and a large amount of the gas generating fuel 70 is ignited in a short time.

[0058] In some embodiments, a burst diaphragm can be arranged in the on-off part 21, at this time, the pressure threshold at which the on-off part 21 connects the two sides of the adjusting member 2 is the burst pressure of the burst diaphragm. It can be understood that the pressure threshold can be set by controlling the burst pressure of the selected burst diaphragm. Specifically, when the igniter 10 works, the ignition fuel 4 burns, the pressure in the ignition chamber 1 increases to cause the central dome of the burst diaphragm in the on-off part 21 to generate tensile stress, and the burst diaphragm in the on-off part 21 bursts when the pressure it bears exceeds the burst pressure, and the first combustion space and the second combustion space are connected.

[0059] In some embodiments, the material of the burst diaphragm is a nickel-based alloy.

[0060] In the embodiments of the present application, by arranging the on-off part 21 on the adjusting member 2, not only the adjusting member 2 can isolate the first combustion space in the ignition chamber 1 and the second combustion space in the combustion chamber 20 when the igniter 10 does not work, thereby reducing the risk of accidental triggering of the gas generating fuel 70. The adjusting member 2 also releases the high-temperature substances generated by the combustion of the ignition fuel 4 when the pressure in the ignition chamber 1 reaches a corresponding threshold, so as to improve the diffusion ability of the high-temperature substances in the combustion chamber 20, and then make the high-temperature substances uniformly contact with the gas generating fuel 70. Therefore, a large amount of the gas generating fuel 70 is ignited in a short time, which helps to improve the inflation efficiency of the gas generating device 100 and protect the passengers.

[0061] Of course, the on-off part 21 can also not be arranged on the adjusting member 2. For example, in other embodiments, the adjusting member 2 can be configured to break when the pressure in the first combustion space reaches a threshold, or to melt when the temperature in the first combustion space reaches a threshold.

[0062] In some embodiments, the igniter 10 further comprises an ignition member 3, the ignition member 3 is connected with the ignition chamber 1, and the ignition member 3 is used to ignite the fuel in the ignition chamber 1.

[0063] The ignition member 3 is connected with an ignition wire harness, and the ignition wire harness controls the ignition member 3 to generate sparks in response to a collision signal of the vehicle, so as to ignite the ignition fuel 4 in the ignition chamber 1.

[0064] Referring toFigure 4 In some embodiments, the first combustion space comprises a first space 13a for igniting the first fuel, and a second space 13b for igniting the second fuel, the first space 13a being in communication with the second space 13b, and one side of each of the adjusting members 2 being connected to the first space 13a.

[0065] The first space 13a and the second space 13b can be understood as the first combustion space introduced above. The first space 13a and the second space 13b are both used for accommodating the ignition fuel 4. The ignition fuel 4 in the first space 13a and the second space 13b can be the same or different.

[0066] The igniter 10 is configured to ignite the ignition fuel 4 in the second space 13b.

[0067] Since the igniting member 3 is connected to the ignition wire harness, its position is limited by the installation space, and the position of the first space 13a is limited by the positions of the two end combustion chambers 20, resulting in the need to set the igniting member 3 and the first space 13a at different positions. In the embodiments of the present application, the second space 13b is in communication with the first space 13a, so that the setting position of the igniting member 3 can not be limited by the first space 13a, which helps to improve the assembly flexibility of the gas generating device 100.

[0068] Reference Figure 4 In some embodiments, the ignition chamber 1 comprises a first housing 11 and a second housing 12 connected to each other, the first space 13a is located in the first housing 11, and the second space 13b is located between the first housing 11 and the second housing 12. The first adjusting member 2a and the second adjusting member 2b are arranged in the first housing 11.

[0069] The first space 13a can be enclosed and defined by each wall portion of the first housing 11, or the first space 13a can be defined by the first housing 11, the first adjusting member 2a and the second adjusting member 2b.

[0070] In some embodiments, the first housing 11 is in a cylindrical shape. This helps to reduce the difficulty of preparing the first space 13a.

[0071] It can be understood that the first housing 11 is a hollow housing. Exemplarily, the first housing 11 is in a cylindrical shape, and the first housing 11 is open at both axial ends.

[0072] In some embodiments, the first housing 11 is open at both axial ends, the first adjusting member 2a and the second adjusting member 2b are arranged in the first housing 11 at intervals, and the first adjusting member 2a, the second adjusting member 2b and the first housing 11 define the first space 13a.

[0073] In some embodiments, the second housing 12 is sleeved on the first housing 11. In this way, the structure of the igniter 10 is more compact, which helps to reduce the volume of the igniter 10, thereby reducing the space occupation.

[0074] In some embodiments, the second housing 12 can be provided with a mounting hole 121, the mounting hole 121 being in communication with the second space 13b, and the ignition member 3 being arranged in the mounting hole 121, wherein the ignition end of the ignition member 3 faces the second space 13b.

[0075] Referring to Figure 7 In some embodiments, the first housing 11 and the second housing 12 define a second space 13b, and the first housing 11 is provided with an ignition passage 111, the first space 13a and the second space 13b being in communication through the ignition passage 111.

[0076] It can be understood that the ignition passage 111 penetrates the wall of the first housing 11, the ignition passage 111 being in communication between the inside and the outside of the first housing 11, and the first space 13a and the second space 13b being in communication through the ignition passage 111.

[0077] When the ignition member 3 receives the ignition signal to generate a spark, the ignition fuel 4 in the second space 13b is ignited, the high-temperature substance generated by the combustion of the ignition fuel 4 in the second space 13b is discharged to the first space 13a through the ignition passage 111, and the ignition fuel 4 in the first space 13a is ignited, and then the ignition fuel 4 in the first space 13a is discharged to the combustion chamber 20 through the on-off part 21, and then the gas generating fuel 70 in the combustion chamber 20 is ignited.

[0078] In some embodiments, the adjustment member 2 is arranged separately from the first housing 11, and the adjustment member 2 abuts against the inner surface of the first housing 11. The adjustment member 2 is indirectly connected with the combustion chamber 20 through the first housing 11.

[0079] In some embodiments, at least one of the two adjustment members 2 is movably connected to the ignition chamber 1. Specifically, the first adjustment member 2a and the second adjustment member 2b are movably arranged in the first housing 11 along the axial direction of the first housing 11. In some embodiments, the first housing 11 can be provided with internal threads, so as to facilitate adjustment of the position of the adjustment member 2 on the first housing 11 by rotating the adjustment member 2 when the igniter 10 is assembled.

[0080] In some embodiments, the first housing 11 can be provided with a sliding rail, and the adjustment member 2 is slidably arranged on the sliding rail.

[0081] Generally, different vehicle models have different structures, different installation spaces, and different airbag lengths, which result in different positions of the gas generating device 100 relative to the airbag, and thus result in the airbag being offset relative to the gas generating device 100. If the sizes of the first combustion chamber 20a and the second combustion chamber 20b are constant and the gas production amount is constant, the inflation rates of the two ends of the airbag are different, and the end of the airbag that is farther away inflates with a delay and cannot timely protect the passengers in the vehicle.

[0082] In the embodiments of the present application, when the operator assembles the igniter 10, the distance between the adjusting member 2 and the combustion chamber 20 can be controlled by adjusting the position of the adjusting member 2, the size of the space in the combustion chamber 20 is controlled, the assembly amount of the gas production fuel 70 is controlled, and the gas production amount is controlled to adapt to the airbags of different vehicle models. This helps to improve the assembly flexibility of the gas generating device 100 and helps to standardize the production of each component of the gas generating device 100.

[0083] In some embodiments, the adjusting member 2 is separately arranged from the first shell 11. In this way, when the operator assembles the igniter 10, the sizes of the combustion spaces in the first combustion chamber 20a and the second combustion chamber 20b can be controlled by adjusting the position of the adjusting member 2, the assembly amount of the gas production fuel 70 is controlled, and the gas production amounts of different combustion chambers 20 are controlled to adapt to the airbags of different vehicle models. This helps to improve the assembly flexibility of the gas generating device 100 and helps to standardize the production of each component of the gas generating device 100.

[0084] Referring to Figure 7 In some embodiments, a plurality of ignition channels 111 are arranged, the plurality of ignition channels 111 are arranged at intervals along the axial direction of the first shell 11, and at least one of the plurality of ignition channels 111 is configured to communicate the first space 13a and the second space 13b. The second shell 12 is configured to be axially movable relative to the first shell 11. When the second shell 12 moves axially relative to the first shell 11, at least one of the plurality of ignition channels 111 is configured to communicate the first space 13a and the second space 13b.

[0085] In the embodiments of the present application, when the adjusting member 2 is movable, by arranging a plurality of ignition channels 111, the first space 13a can still be in communication with the second space 13b when the position of the airbag relative to the gas generating device 100 is set according to different vehicle models. Thus, the same components can be used to assemble the gas generating device 100 that adapts to different vehicle models, which helps to improve the compatibility of the gas generating device 100 and helps to standardize the production of the gas generating device 100 and reduce production costs.

[0086] Referring to Figure 7In some embodiments, the plurality of ignition channels 111 are arranged at intervals around the circumference of the first housing 11, and the second housing 12 is configured to be rotatable relative to the first housing 11 so as to make at least one of the plurality of ignition channels 111 communicate the first space 13a with the second space 13b.

[0087] Referring to Figure 7 In some embodiments, the ignition channel 111 comprises a plurality of sub-channels 112, each of which communicates the first space 13a with the second space 13b. Exemplarily, the plurality of sub-channels 112 are arranged at intervals around the circumference of the first housing 11.

[0088] Exemplarily, the ignition channel 111 is provided with three sub-channels 112.

[0089] Exemplarily, the ignition channel 111 is provided with three sub-channels 112, one of which is arranged along the axial direction of the first housing 11, one of which is arranged close to one end of the first housing 11, and one of which is arranged close to the other end of the first housing 11. The three sub-channels 112 are staggered around the circumference of the first housing 11.

[0090] In some embodiments, the first adjusting member 2a and the second adjusting member 2b are respectively arranged on the side away from each other for contacting a combustion chamber 20.

[0091] Referring to Figure 3 and 4 Exemplarily, the first combustion chamber 20a has a third space 20a2 therein for containing the gasified fuel 70, and the second combustion chamber 20b has a fourth space 20b2 therein for containing the gasified fuel 70, and the third space 20a2 and the fourth space 20b2 are the second combustion spaces mentioned above. The first adjusting member 2a is arranged between the first space 13a and the third space 20a2, and contacts the first space 13a on one side and contacts the third space 20a2 on the other side. The second adjusting member 2b is arranged between the first space 13a and the fourth space 20b2, and contacts the first space 13a on one side and contacts the fourth space 20b2 on the other side.

[0092] According to a second aspect of the present application, there is provided a gas generating device 100 comprising the igniter 10 of any of the embodiments of the first aspect. Since the gas generating device 100 comprises the igniter 10 of any of the embodiments of the first aspect, the gas generating device 100 has all the beneficial effects of the igniter 10, which will not be repeated here.

[0093] In some embodiments, the gas generating device 100 further comprises a first combustion chamber 20a and a second combustion chamber 20b, and the igniter 10 is arranged between the first combustion chamber 20a and the second combustion chamber 20b.

[0094] Exemplarily, the first combustion chamber 20a, the igniter 10 and the second combustion chamber 20b are arranged in sequence along the axial direction.

[0095] In the embodiments of the present application, the igniter 10 is arranged between the first combustion chamber 20a and the second combustion chamber 20b, so that the igniter 10 does not occupy the radial space of the gas generating device 100, which helps to reduce the cross-sectional area of the gas generating device 100, for example, to reduce the radial dimension of the cylindrical gas generating device 100, thereby the gas generating device 100 is suitable for narrower installation environment, for example, the roof and the side wing of the seat of the vehicle.

[0096] With reference to Figure 3 In some embodiments, the first combustion chamber 20a has a third space 20a2, the second combustion chamber 20b has a fourth space 20b2, the first adjusting member 2a is located between the third space 20a2 and the first combustion space, and the second adjusting member 2b is located between the fourth space 20b2 and the first combustion space.

[0097] Specifically, the first adjusting member 2a is located between the third space 20a2 and the first space 13a of the ignition chamber 1, and the second adjusting member 2b is located between the fourth space 20b2 and the first space 13a of the ignition chamber 1.

[0098] With reference to Figures 1 to 5 In some embodiments, the igniter 10 is sleeved on the first combustion chamber 20a and / or the second combustion chamber 20b.

[0099] Exemplarily, the first shell 11 is sleeved on the first combustion chamber 20a, the second shell 12 is sleeved on the second combustion chamber 20b, or it can be various sleeving modes between the first shell 11, the second shell 12, the first combustion chamber 20a and the second combustion chamber 20b. The sleeving connection facilitates the disassembly between the first shell 11, the second shell 12, the first combustion chamber 20a and the second combustion chamber 20b, and at the same time, facilitates the position adjustment of the adjusting member.

[0100] With reference to Figure 3 In some embodiments, the gas generating device 100 has a first gas outlet 20a1 and a second gas outlet 20b1, the first gas outlet 20a1 is located on the side of the first combustion chamber 20a away from the igniter 10, and the second gas outlet 20b1 is located on the side of the second combustion chamber 20b away from the igniter 10.

[0101] Exemplarily, the end of the first combustion chamber 20a away from the igniter 10 can be tapered, and the first gas outlet 20a1 is arranged at the small end of the taper to pressurize the gas generated by the gas generating combustion, increase the gas flow rate, and accelerate the charging efficiency of the first gas outlet 20a1.

[0102] Similarly, the end of the second combustion chamber 20b away from the igniter 10 can also be tapered, and the second gas outlet 20b1 is arranged at the small end of the taper to pressurize the gas generated by the gas generating fuel 70, increase the gas flow rate, and speed up the charging efficiency of the second gas outlet 20b1.

[0103] In the embodiments of the present application, the first gas outlet 20a1 is arranged on the side of the first combustion chamber 20a away from the igniter 10, and the second gas outlet 20b1 is arranged on the side of the second combustion chamber 20b away from the igniter 10, so that the first gas outlet 20a1 and the second gas outlet 20b1 are away from the igniter 10. Thus, the first gas outlet 20a1 and the second gas outlet 20b1 are away from the ignition wire harness connected to the igniter 10, which helps to reduce the risk of misfire caused by the high-temperature spatter of the first gas outlet 20a1 or the second gas outlet 20b1 igniting the ignition wire harness.

[0104] In some embodiments, the gas generating device 100 further comprises a first filter 30 arranged between the first gas outlet 20a1 and the first adjusting member (2a). It can be understood that the first filter 30 is located inside the first gas outlet.

[0105] In some embodiments, the gas generating device 100 further comprises a second filter 40 arranged between the second gas outlet 20b1 and the second adjusting member (2b). It can be understood that the second filter 40 is located inside the second gas outlet 20b1.

[0106] The first filter 30 and the second filter 40 can be understood as a filter screen for filtering high-temperature residues in the combustion chamber 20 to avoid burning the airbag, while allowing gas to pass through to charge the airbag, which helps to reduce the hidden dangers of the gas generating device 100.

[0107] The airbag deployment force is too large and easy to impact the passenger, causing the passenger to be injured. Therefore, a diffuser can be arranged at the gas outlet to uniformly diffuse the gas and relieve the airbag deployment force. In some embodiments, the gas generating device 100 further comprises a first diffuser 50 arranged at the end of the first combustion chamber 20a away from the igniter 10, and the first diffuser 50 is provided with a plurality of first gas holes 51 in communication with the first gas outlet 20a1. The first gas holes 51 are used for communication between the internal space and the external space of the gas generating device 100.

[0108] In some embodiments, the gas generating device 100 further comprises a second diffuser 60, which is arranged at an end of the second combustion chamber 20b away from the igniter 10, and the second diffuser 60 is provided with a plurality of second gas holes 52, which are in communication with the second gas outlet 20b1. The second gas holes 52 are used for the communication between the internal space of the gas generating device 100 and the external space.

[0109] The first diffuser 50 can be arranged on the conical end of the first combustion chamber 20a, and a second diffusion cavity is defined between the first diffuser 50 and the first combustion chamber 20a. The gas generated by the gas generating fuel 70 enters the first diffusion cavity through the first gas outlet 20a1 and is uniformly diffused to the gas bag through the plurality of first gas holes 51.

[0110] The second diffuser 60 can be arranged on the conical end of the second combustion chamber 20b, and a second diffusion cavity is defined between the second diffuser 60 and the second combustion chamber 20b. The gas generated by the gas generating fuel 70 enters the second diffusion cavity through the second gas outlet 20b1 and is uniformly diffused to the gas bag through the plurality of second gas holes 52.

[0111] Referring to Figures 1 to 7 The embodiments of the present application provide a gas generating device 100, which comprises an igniter 10, a first combustion chamber 20a, a second combustion chamber 20b, a first diffuser 50, a second diffuser 60, a first filter 30 and a second filter 40.

[0112] The igniter 10 comprises an ignition element 3, a first shell 11, a second shell 12, a first adjusting element 2a and a second adjusting element 2b.

[0113] The first shell 11 is in a cylindrical shape, the second shell 12 is sleeved on the first shell 11, and the first adjusting member 2a and the second adjusting member 2b are arranged in the first shell 11 at intervals. The first adjusting member 2a abuts against the inner surface of the first shell 11, and the second adjusting member 2b abuts against the inner surface of the first shell 11. The first adjusting member 2a, the first shell 11 and the second adjusting member 2b define a first space 13a. The first shell 11 and the second shell 12 define a second space 13b. The second shell 12 is provided with a mounting hole 121, the igniter 3 is arranged in the mounting hole 121, the mounting hole 121 is connected with the second space 13b, and the end surface of the igniter 3 faces the second space 13b. The first shell 11 is provided with an ignition passage 111, and the first space 13a and the second space 13b are communicated through the ignition passage 111. The ignition passage 111 is provided with a plurality of ignition passages 111, the plurality of ignition passages 111 are arranged at intervals along the axial direction of the first shell 11, and one of the plurality of ignition passages 111 is configured to communicate the first space 13a and the second space 13b. The plurality of ignition passages 111 are arranged at intervals in the circumferential direction of the first shell 11, and the second shell 12 is configured to rotate relative to the first shell 11 to make one of the plurality of ignition passages 111 communicate the first space 13a and the second space 13b. The ignition passage 111 includes a plurality of sub-passages 112, and the plurality of sub-passages 112 are arranged at intervals in the circumferential direction of the first shell 11.

[0114] The first combustion chamber 20a, the second combustion chamber 20b and the igniter 10 are arranged in sequence along the axial direction. The first shell 11 is sleeved on the first combustion chamber 20a, and the second shell 12 is sleeved on the second combustion chamber 20b. The first combustion chamber 20a is provided with a first gas outlet 20a1 on the side away from the igniter 10, and the second combustion chamber 20b is provided with a second gas outlet 20b1 on the side away from the igniter 10. The first filter 30 is arranged on the inner side of the first gas outlet 20a1, and the second filter 40 is arranged on the inner side of the second gas outlet 20b1. The first diffuser 50 is arranged on the end of the first combustion chamber 20a away from the igniter 10, and the first diffuser 50 is provided with a plurality of first gas holes 51, and the plurality of first gas holes 51 are communicated with the first gas outlet 20a1. The second diffuser 60 is arranged on the end of the second combustion chamber 20b away from the igniter 10, and the second diffuser 60 is provided with a plurality of second gas holes 52, and the plurality of second gas holes 52 are communicated with the second gas outlet 20b1.

[0115] According to the third aspect of the present application, a safety airbag system is provided, which comprises the gas generating device 100 of any one of the third aspect. Since the safety airbag system comprises the above-mentioned gas generating device 100, the safety airbag system has all the beneficial effects of the gas generating device 100, which will not be repeated here.

[0116] According to a fourth aspect of the present application, a vehicle is provided, comprising the airbag system of any of the third aspect. Since the vehicle comprises the airbag system as described above, the vehicle has all the beneficial effects of the airbag system, which will not be repeated here.

[0117] The vehicle can be a fuel automobile, a plug-in hybrid electric vehicle or a new energy vehicle, etc., which is not limited in the present application.

[0118] In the description of the present application, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0119] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0120] The embodiments, implementation manners and related technical features of the present application can be combined, replaced with each other without conflict.

[0121] The above is only the preferred embodiments of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solution of the present application still falls within the scope of the technical solution of the present application.

Claims

1. An igniter (10) characterized by, The ignition device comprises: an ignition chamber having a first combustion space for igniting fuel, at least two adjusting members, one side of each of the adjusting members being connected to the ignition chamber, the other side of each of the adjusting members being used for connecting to a combustion chamber, and each of the adjusting members being connected to different combustion chambers, the combustion chambers having second combustion spaces for burning fuel.

2. The igniter of claim 1 wherein, The first combustion space comprises a first space and a second space, the first space being in communication with the second space, and one side of each of the adjusting members being connected to the first space.

3. The igniter of claim 2 wherein, The ignition chamber comprises a first casing and a second casing connected to each other, the first space being located in the first casing, and the second space being located between the first casing and the second casing.

4. The igniter of claim 3 wherein, The first casing is in a cylindrical shape.

5. The igniter of claim 4 wherein, The second casing is sleeved on the first casing.

6. The igniter of claim 5 wherein, The first casing is provided with ignition passages, and the first space and the second space are in communication through the ignition passages.

7. The igniter of claim 6 wherein, The ignition passages are provided in plurality, and the plurality of ignition passages are arranged in an axial direction of the first casing, at least one of the plurality of ignition passages being configured to connect the first space and the second space.

8. The igniter of claim 7 wherein, The plurality of ignition passages are arranged in a circumferential direction of the first casing, and the second casing is configured to rotate relative to the first casing to connect the first space and the second space through at least one of the plurality of ignition passages.

9. The igniter of claim 7 or 8, wherein The ignition passages comprise a plurality of sub-passages, and each of the plurality of sub-passages connects the first space and the second space.

10. The igniter of claim 3 wherein, At least one of the two adjusting members is movably connected to the ignition chamber.

11. The igniter of claim 3 wherein, The at least two adjusting members comprise a first adjusting member and a second adjusting member, and the first adjusting member and the second adjusting member are arranged in the first casing in a spaced manner.

12. The igniter of claim 11 wherein, The first adjusting member and the second adjusting member are respectively used for connecting to a combustion chamber on a side away from each other.

13. The igniter of any one of claims 1-8, wherein, The adjusting member comprises an on-off part for adjusting the on-off between the first combustion space and the second combustion space.

14. The igniter of any one of claims 1-8, wherein, The ignition device further comprises: an ignition member connected to the ignition chamber for igniting fuel in the ignition chamber.

15. A gas generating device characterized by comprising: The gas generating device comprises the ignition device according to any one of claims 1-14.

16. The gas generating device according to claim 15, wherein The gas generating device further comprises a first combustion chamber and a second combustion chamber, and the ignition device is located between the first combustion chamber and the second combustion chamber.

17. The gas generating device according to claim 16, wherein The first combustion chamber has a third space, the second combustion chamber has a fourth space, one of the two adjusting members is located between the third space and the first combustion space, and the other of the two adjusting members is located between the fourth space and the first combustion space.

18. The gas generating device according to claim 17, wherein The ignition device is sleeved on the first combustion chamber and / or the second combustion chamber.

19. The gas generating device according to claim 17, wherein The gas generating device has a first gas outlet and a second gas outlet, the first gas outlet is located on a side of the first combustion chamber away from the ignition device, and the second gas outlet is located on a side of the second combustion chamber away from the ignition device.

20. The gas generating device according to claim 19, wherein The gas generating device further comprises a first filter provided between the first gas outlet and the first adjusting member; and / or, The gas generating device further comprises a second filter, which is arranged between the second gas outlet and the second adjusting member.

21. The gas generating device according to claim 19, wherein The gas generating device further comprises: a first diffuser, which is arranged at an end of the first combustion chamber away from the igniter; and / or, a second diffuser, which is arranged at an end of the second combustion chamber away from the igniter.

22. An airbag system characterized by comprising: A gas generating device according to any one of claims 15-21.

23. A vehicle characterized by comprising: An airbag system according to claim 22.

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