Electric ignition tube and gas generator

Abstract

The invention relates to the technical field of gas generators, in particular to an electric ignition tube and a gas generator. The electric ignition tube comprises a gunpowder cavity group, a tube body and an electrode tube group; a plurality of gunpowder cavities are arranged in the gunpowder cavity group, and each gunpowder cavity contains ignition powder and ignition powder; the tube body is sleeved outside the electrode tube group and the gunpowder cavity group, and the electrode tube group is propped against the ignition powder; wherein the electrode tube group is used for igniting the ignition charge in the plurality of gunpowder chambers at the same time or in stages. The electric ignition tube is applied to the gas generator, is simple in structure and convenient to mount, and can realize simultaneous or hierarchical control during ignition, so that the hierarchical gas production function of the gas generator is realized; and the structural size is small, and the occupied internal space of the gas generator can be reduced, so that the space utilization rate of the gas generator can be improved, and the manufacturing and using cost of the gas generator is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gas generators, in particular to an electric ignition tube and a gas generator. Background Art

[0002] The gas generator is the core module of the airbag. When a car collides, the ignition device will be activated, prompting the gas generator to produce gas and fill the airbag. The ignition device is activated by the electric ignition tube. Nowadays, based on different collision directions, the front and rear positions of seats, and the body shapes of passengers, the application scenarios or working conditions of automobile airbags are different. Specifically, the functional requirements of airbags, that is, the filling degree, filling size, and filling time of airbags need to be adjusted according to the working conditions.

[0003] Based on this, for the gas generator, a two-stage gas generator is needed to control the work of different levels, and its starting point is to use the graded ignition function of the ignition tube, but currently the two-stage gas generator uses two ignition tubes for graded control. The use of two ignition tubes has a great impact on the structural layout design, space utilization and cost of the gas generator. Summary of the invention

[0004] The purpose of the present invention includes providing an electric ignition tube and a gas generator, which have a simple structure, are easy to install, and can achieve simultaneous or staged control of ignition, thereby realizing the staged gas production function of the gas generator; and its structure is small in size, which can reduce the internal space occupied by the gas generator, thereby improving the space utilization of the gas generator and reducing the production and use costs of the gas generator.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides an electric ignition tube, the electric ignition tube comprising a powder chamber group, a tube body and an electrode tube group;

[0007] The gunpowder chamber group is provided with a plurality of gunpowder chambers, and each gunpowder chamber contains ignition powder and ignition powder;

[0008] The tube body is sleeved outside the electrode tube group and the gunpowder chamber group, and the electrode tube group is against the ignition powder;

[0009] The electrode tube group is used to ignite the ignition powder in multiple powder chambers simultaneously or in stages.

[0010] In an optional embodiment, the electrode tube group includes a first heating circuit and a second heating circuit, and the powder chamber group includes a first powder chamber and a second powder chamber;

[0011] The first heating circuit is used to ignite the ignition powder in the first gunpowder chamber, and the second heating circuit is used to ignite the ignition powder in the second gunpowder chamber.

[0012] In an optional embodiment, the powder chamber group includes a main body, and a partition is arranged in the main body, and the partition divides the main body into a first powder chamber and a second powder chamber;

[0013] The electrode tube group extends into the main tube and abuts against the ignition powder in the first powder chamber and the second powder chamber.

[0014] In an optional embodiment, the powder chamber group includes a heat insulating member and two powder placing tubes;

[0015] The two charge tubes are respectively provided with a first gunpowder chamber and a second gunpowder chamber, and the two charge tubes are separated by a heat insulating member;

[0016] The electrode tube group extends into the two powder placing tubes and abuts against the ignition powder in the first powder chamber and the second powder chamber.

[0017] In an optional embodiment, the first heating circuit includes a first electrode and a first heating bridge wire, the second heating circuit includes a second electrode and a second heating bridge wire, and the electrode tube assembly further includes a connecting electrode;

[0018] The first electrode, the connecting electrode and the first heating bridge wire are connected in sequence; the second electrode, the connecting electrode and the second heating bridge wire are connected in sequence;

[0019] The first heating bridge wire is in contact with the ignition powder in the first gunpowder chamber, and the second heating bridge wire is in contact with the ignition powder in the second gunpowder chamber.

[0020] In an optional embodiment, the first electrode and the second electrode are arranged around the connecting electrode, or the first electrode, the second electrode and the connecting electrode are arranged at intervals around the same axis.

[0021] In an optional embodiment, the electrode tube assembly further includes an insulator covering at least one of the first electrode, the second electrode and the connecting electrode to separate the first electrode, the second electrode and the connecting electrode.

[0022] In an optional embodiment, the connecting electrode includes a first connecting electrode and a second connecting electrode; the first electrode, the first connecting electrode and the first heating bridge wire are connected in sequence; the second electrode, the second connecting electrode and the second heating bridge wire are connected in sequence;

[0023] The first heating bridge wire is in contact with the ignition powder in the first gunpowder chamber, and the second heating bridge wire is in contact with the ignition powder in the second gunpowder chamber.

[0024] In an optional embodiment, the first electrode, the second electrode, the first connecting electrode and the second connecting electrode are arranged at intervals around the same axis.

[0025] In a second aspect, the present invention provides a gas generator, the gas generator comprising a main body and the above-mentioned electric ignition tube;

[0026] The main body is provided with at least two combustion chambers for accommodating gas generating agents, and the two gunpowder chambers of the electric ignition tube correspond to one combustion chamber respectively, and the ignition powder in each gunpowder chamber is used to ignite the gas generating agent in the corresponding combustion chamber.

[0027] The beneficial effects of the electric ignition tube and the gas generator provided by the embodiments of the present invention include:

[0028] The electric ignition tube includes a powder cavity group, a tube body and an electrode tube group; the powder cavity group has multiple powder chambers, and each powder chamber contains ignition powder and ignition powder; the tube body is sleeved outside the electrode tube group and the powder cavity group, and the electrode tube group is against the ignition powder; wherein the electrode tube group is used to ignite the ignition powder in multiple powder chambers simultaneously or in stages. The electric ignition tube is applied to the gas generator, and has a simple structure and is easy to install. It can realize simultaneous or staged control of ignition, thereby realizing the staged gas production function of the gas generator; and its structure is small in size, which can reduce the internal space occupied by the gas generator, thereby improving the space utilization rate of the gas generator and reducing the manufacturing and use costs of the gas generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of the electric ignition tube provided in this embodiment;

[0031] Figure 2 A schematic diagram of the structure of the powder chamber assembly and the electrode tube assembly provided in this embodiment;

[0032] Figure 3 A schematic diagram of the structure of the gunpowder chamber group provided in this embodiment;

[0033] Figure 4 A schematic diagram of the structure of the electrode tube group provided in this embodiment, wherein A is a top view and B is a front view;

[0034] Figure 5A schematic diagram of the structure when the first electrode, the second electrode and the connecting electrode provided in this embodiment are arranged around the same axis;

[0035] Figure 6 A schematic diagram of the structure of the first connection electrode and the second connection electrode provided in this embodiment, wherein A is a top view and B is a front view;

[0036] Figure 7 A schematic diagram of the structure of the connecting electrodes and metal parts provided in this embodiment;

[0037] Figure 8 This is a schematic structural diagram of the first connecting electrode, the second connecting electrode and the metal member provided in this embodiment.

[0038] Icons: 100-electric ignition tube; 110-gunpowder chamber group; 120-tube body; 130-electrode tube group; 111-gunpowder chamber; 112-priming powder; 113-ignition powder; 131-first heating circuit; 132-second heating circuit; 114-first gunpowder chamber; 115-second gunpowder chamber; 116-main body; 117-partition; 133-first electrode; 134-first heating bridge wire; 135-second electrode; 136-second heating bridge wire; 137-connecting electrode; 138-insulator; 139-first connecting electrode; 141-second connecting electrode; 142-metal part; 143-metal division. DETAILED DESCRIPTION

[0039] In order to make the advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0045] Please refer to Figure 1-Figure 3 , this embodiment provides an electric ignition tube 100, the electric ignition tube 100 includes a powder chamber group 110, a tube body 120 and an electrode tube group 130;

[0046] The gunpowder chamber group 110 has a plurality of gunpowder chambers 111 therein, and each gunpowder chamber 111 contains an ignition powder 112 and an ignition powder 113;

[0047] The tube body 120 is sleeved outside the electrode tube assembly 130 and the powder chamber assembly 110, and the electrode tube assembly 130 abuts against the ignition powder 112;

[0048] The electrode tube group 130 is used to ignite the ignition powder 112 in a plurality of powder chambers 111 simultaneously or in stages.

[0049] It should be noted that the tube body 120 can be made of nylon or other materials and can be wrapped around the electrode tube group 130 and the powder chamber group 110 by injection molding, so that the powder chamber group 110, the tube body 120 and the electrode tube group 130 form an integral structure.

[0050] Please refer to Figure 1-Figure 3 The working principle of the electric ignition tube 100 is:

[0051] The electric ignition tube 100 is used in a gas generator, and its function is to realize the graded gas production function of the gas generator;

[0052] Specifically, the electric ignition tube 100 includes a powder chamber group 110, a tube body 120 and an electrode tube group 130;

[0053] The gunpowder chamber group 110 has a plurality of gunpowder chambers 111 therein, and each gunpowder chamber 111 contains an ignition powder 112 and an ignition powder 113;

[0054] The tube body 120 is sleeved outside the electrode tube group 130 and the gunpowder chamber group 110, and the electrode tube group 130 abuts against the ignition powder 112; the electrode tube group 130 is used to ignite the ignition powder 112 in multiple gunpowder chambers 111 simultaneously or in stages;

[0055] Therefore, by applying the electric ignition tube 100 to the gas generator, during use, the ignition powder 112 in the multiple powder chambers 111 can be ignited simultaneously or in stages through the electrode tube group 130, and then, when the ignition powder 112 in the multiple powder chambers 111 is ignited simultaneously or in stages, the ignition powder 113 can be ignited simultaneously or in stages, so that the gas generating agents in the multiple combustion chambers of the gas generator can produce gas simultaneously or in stages;

[0056] Therefore, compared with the prior art solution of setting multiple ignition tubes, the present embodiment can realize simultaneous or graded control of ignition through an electric ignition tube 100, thereby realizing the graded gas production function of the gas generator, thereby simplifying its structure for realizing graded gas production; and during the installation process, compared with the installation method of multiple ignition tubes, its installation is more convenient and the structure volume is smaller, thereby reducing the internal space occupied by the gas generator, thereby improving the space utilization of the gas generator and reducing the production and use costs of the gas generator.

[0057] For further information, please refer to Figure 1-Figure 3 In the present embodiment, when configuring the electrode tube group 130, it can be known from the above content that in order to realize staged ignition and then staged gas production, based on this, taking two-stage gas production as an example, the electrode tube group 130 includes a first heating circuit 131 and a second heating circuit 132, and the gunpowder chamber group 110 correspondingly includes a first gunpowder chamber 114 and a second gunpowder chamber 115; wherein, the first heating circuit 131 is used to ignite the ignition powder 112 in the first gunpowder chamber 114, and the second heating circuit 132 is used to ignite the ignition powder 112 in the second gunpowder chamber 115.

[0058] Thus, through the above-mentioned structural setting, two heating circuits can be arranged in the electrode tube group 130, and the two heating circuits are respectively the first heating circuit 131 and the second heating circuit 132; and correspondingly, the gunpowder chamber group 110 is correspondingly provided with the first gunpowder chamber 114 and the second gunpowder chamber 115;

[0059] Furthermore, by making the first heating circuit 131 used to ignite the ignition powder 112 in the first gunpowder chamber 114, and the second heating circuit 132 used to ignite the ignition powder 112 in the second gunpowder chamber 115, the first heating circuit 131 and the second heating circuit 132 can be independently controlled to achieve simultaneous or staged ignition, and then when applied to a gas generator, staged gas production can be achieved.

[0060] It should be noted that in this embodiment, two-stage ignition is taken as an example for explanation, and based on the above-mentioned structural setting, the same setting principle can also be adopted. By increasing the number of heating circuits and adjusting the number of corresponding gunpowder chambers 111 accordingly, other levels of graded gas production can be achieved.

[0061] Please refer to Figure 4 , and combined with Figure 1-Figure 3 When configuring the first heating circuit 131 and the second heating circuit 132, the first heating circuit 131 may include a first electrode 133 and a first heating bridge wire 134, the second heating circuit 132 may include a second electrode 135 and a second heating bridge wire 136, and the electrode tube group 130 also includes a connecting electrode 137; and the first electrode 133, the connecting electrode 137 and the first heating bridge wire 134 are connected in sequence; the second electrode 135, the connecting electrode 137 and the second heating bridge wire 136 are connected in sequence; wherein the first heating bridge wire 134 is in contact with the ignition powder 112 in the first gunpowder chamber 114, and the second heating bridge wire 136 is in contact with the ignition powder 112 in the second gunpowder chamber 115.

[0062] Therefore, through the above-mentioned structural setting, when the power is turned on, when the first heating circuit 131 is turned on, the first heating bridge wire 134 is electrically conductive and generates heat, so that the ignition powder 112 in the first gunpowder chamber 114 in contact with the first heating bridge wire 134 is ignited, and then the ignition powder 113 is ignited on this basis;

[0063] On this basis, the second heating circuit 132 can control its power-on state so that it can be powered on simultaneously or in stages with the first heating circuit 131, and then when the second heating circuit 132 is powered on, the second heating bridge wire 136 is electrically conductive and generates heat, and then the ignition powder 112 in the second gunpowder chamber 115 in contact with the second heating bridge wire 136 is ignited, and then the ignition powder 113 is ignited on this basis;

[0064] Therefore, by controlling the power supply of the first heating circuit 131 and the second heating circuit 132 , staged ignition can be achieved, and the gas generator can then achieve staged gas production.

[0065] When configuring the first electrode 133, the second electrode 135 and the connecting electrode 137, the first electrode 133 and the second electrode 135 may be arranged around the connecting electrode 137 (eg, Figure 4 As shown), or, the first electrode 133, the second electrode 135 and the connecting electrode 137 are arranged in a spaced manner around the same axis (as shown Figure 5That is, the connection electrode 137 may be disposed between the first electrode 133 and the second electrode 135, or the first electrode 133, the second electrode 135 and the connection electrode 137 may be distributed in three sectors of the same circle.

[0066] It should be noted that in the above content, when the connecting electrode 137 is a single electrode, the first heating circuit 131 and the second heating circuit 132 are connected in parallel to the connecting electrode 137. Figure 6 , and combined with Figure 1-Figure 3 , the connecting electrode 137 may also include a first connecting electrode 139 and a second connecting electrode 141; the first electrode 133, the first connecting electrode 139 and the first heating bridge wire 134 are connected in sequence; the second electrode 135, the second connecting electrode 141 and the second heating bridge wire 136 are connected in sequence; wherein the first heating bridge wire 134 contacts the ignition powder 112 in the first gunpowder chamber 114, and the second heating bridge wire 136 contacts the ignition powder 112 in the second gunpowder chamber 115. Thus, by such a setting, the connecting electrode 137 is divided into two independent electrodes, thereby making the first heating circuit 131 and the second heating circuit 132 two independent paths. Moreover, in configuring the first electrode 133, the second electrode 135, the first connecting electrode 139 and the second connecting electrode 141, the first electrode 133, the second electrode 135, the first connecting electrode 139 and the second connecting electrode 141 are arranged at intervals around the same axis.

[0067] Based on the above-mentioned configuration of the electrode tube group 130, in order to avoid a short circuit in the electrode tube group 130 during use and to improve its stability in use, the electrode tube group 130 further includes an insulator 138 covering at least one of the first electrode 133, the second electrode 135 and the connecting electrode 137 to separate the first electrode 133, the second electrode 135 and the connecting electrode 137, so that the first heating circuit 131 and the second heating circuit 132 can form two insulated and separated paths. Specifically, based on the above-mentioned configuration of the insulator 138, this embodiment adopts, as Figure 4 As shown in A in FIG. 1 , the peripheries of the first electrode 133 , the second electrode 135 and the connecting electrode 137 are all covered with an insulator 138 .

[0068] In addition, when the connection electrode 137 includes the first connection electrode 139 and the second connection electrode 141, Figure 6 As shown in A in FIG. 1 , the first electrode 133 , the second electrode 135 , the first connecting electrode 139 and the second connecting electrode 141 may be covered with an insulator 138 on their peripheries.

[0069] In addition, the configuration of the insulator 138 is different from the above-mentioned configuration. Figure 7 As shown, the insulator 138 can also be used to cover the connecting electrode 137, and a metal member 142 is set outside the insulator 138. The metal member 142 can be a metal shell, or other metal punching members or other conductive structures, which are covered outside the insulator 138. In this case, the metal member 142 can play a role in electrically connecting the first electrode 133 and the second electrode 135; specifically, the metal member 142 is divided into two separated metal divisions 143, and the two metal divisions 143 correspond to the first electrode 133 and the second electrode 135 respectively. 5, and the first electrode 133 and the second electrode 135 can be welded and connected with the corresponding metal division 143, and the first heating bridge wire 134 electrically connected to the first electrode 133 can be connected to the metal division 143, thereby, the first heating circuit 131 can be formed by electrically connecting the first electrode 133 and the first heating bridge wire 134 through one of the metal divisions 143; similarly, the second heating circuit 132 can be formed by electrically connecting the second electrode 135 and the second heating bridge wire 136 through another metal division 143;

[0070] In the case where the connection electrode 137 includes the first connection electrode 139 and the second connection electrode 141, Figure 8 As shown, the insulator 138 can also be used to cover the first connection electrode 139 and the second connection electrode 141, and the insulator 138 covered on the first connection electrode 139 and the second connection electrode 141 is in a diagonal fan shape, and on this basis, a metal part 142 can be set, and the metal part 142 can be a metal shell, or other metal punching parts or other conductive structures, which are arranged outside the insulator 138. At this time, the metal part and the aforementioned insulator 138 form four fan-shaped structures; thus, the metal part 142 can be used to electrically connect the first electrode 133 and the second electrode 135; specifically, the metal part 142 is divided into two partitions The two metal divisions 143 correspond to the first electrode 133 and the second electrode 135 respectively, and the first electrode 133 and the second electrode 135 can be welded and connected to the corresponding metal divisions 143, and the first heating bridge wire 134 electrically connected to the first electrode 133 can be connected to the metal division 143. Therefore, the first heating circuit 131 can be formed by electrically connecting the first electrode 133 and the first heating bridge wire 134 through one of the metal divisions 143; similarly, the second heating circuit 132 can be formed by electrically connecting the second electrode 135 and the second heating bridge wire 136 through the other metal division 143.

[0071] It should be noted that the insulator 138 can be made of insulating materials such as sintered glass or nylon, and its purpose is to separate the electrodes and enable the electrodes to form the electrode tube group 130 together.

[0072] For further information, please refer to Figure 1-Figure 3 Based on the structure of the above-mentioned electrode tube group 130, in this embodiment, two-stage control is taken as an example for explanation. Specifically, when configuring the gunpowder chamber group 110, the gunpowder chamber group 110 includes a main body 116, and a partition 117 is arranged in the main body 116. The partition 117 divides the main body 116 into a first gunpowder chamber 114 and a second gunpowder chamber 115; wherein, the electrode tube group 130 extends into the main body 116 and abuts against the ignition powder 112 of the first gunpowder chamber 114 and the second gunpowder chamber 115.

[0073] Therefore, the gunpowder chamber group 110 can adopt a method of configuring a partition 117 in the main body 116, so that the tube body 120 is divided into a first gunpowder chamber 114 and a second gunpowder chamber 115, and the first gunpowder chamber 114 and the second gunpowder chamber 115 both contain ignition powder 112 and ignition powder 113; and in order to facilitate its docking with the electrode tube group 130, the end of the electrode tube group 130 can be extended into the main body 116, so that the first heating bridge wire 134 and the second heating bridge wire 136 of the electrode tube group 130 can respectively abut the ignition powder 112 of the first gunpowder chamber 114 and the ignition powder 112 of the second gunpowder chamber 115.

[0074] In addition, the gunpowder chamber group 110 can also be configured with a heat insulating member and two gunpowder placing tubes, in which the first gunpowder chamber 114 and the second gunpowder chamber 115 are respectively provided, and the two gunpowder placing tubes are separated by a heat insulating member; wherein the electrode tube group 130 extends into the two gunpowder placing tubes and abuts against the ignition powder 112 in the first gunpowder chamber 114 and the second gunpowder chamber 115.

[0075] It should be noted that the above-mentioned partition 117 and thermal insulation can both play the role of heat insulation and insulation, and their structural strength meets the requirements of use.

[0076] Based on the above electric ignition tube 100, please refer to Figure 1-Figure 6 , this embodiment also provides a gas generator, the gas generator includes a main body and the above-mentioned electric ignition tube 100;

[0077] The main body is provided with at least two combustion chambers for accommodating gas generating agents, and the two gunpowder chambers 111 of the electric ignition tube 100 correspond to one combustion chamber respectively, and the ignition powder 113 in each gunpowder chamber 111 is used to ignite the gas generating agent in the corresponding combustion chamber.

[0078] The gas generator is described by taking the realization of dual-stage gas production as an example, therefore, the main body is provided with at least two combustion chambers for accommodating gas-producing agents, and the two gunpowder chambers 111 of the electric ignition tube 100 correspond to one combustion chamber respectively, and the ignition powder 113 in each gunpowder chamber 111 is used to ignite the gas-producing agent in the corresponding combustion chamber;

[0079] Furthermore, during use, by controlling the first heating circuit 131 and the second heating circuit 132 of the electric ignition tube 100, simultaneous or staged start-up can be achieved, thereby achieving staged gas production of the gas generator;

[0080] In addition, when adjusting the gas production level, the number of combustion chambers in the main body can be adaptively adjusted based on the adjustment of the heating circuit of the above-mentioned electric ignition tube 100 and the corresponding gunpowder chamber 111.

[0081] In summary, the gas generator can realize the graded gas production function by adopting the above-mentioned electric ignition tube 100, and such a setting mode, compared with the scheme of setting multiple ignition tubes in the prior art, can realize simultaneous or graded control of ignition through one electric ignition tube 100, thereby realizing the graded gas production function of the gas generator, thereby simplifying its structure for realizing graded gas production;

[0082] Moreover, during the installation process, compared with the prior art, its installation is more convenient and the structure volume is smaller, thereby reducing the internal space occupied by the gas generator, thereby improving the space utilization of the gas generator and reducing the production and use costs of the gas generator.

[0083] Furthermore, the use of the above-mentioned gas generator can realize the intelligent function of the airbag, meet the requirements of multiple application scenarios of the airbag gas generator, and reduce the cost of the gas generator.

[0084] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An electric ignition tube, characterized in that: The electric ignition tube comprises a powder chamber group, a tube body and an electrode tube group; The gunpowder chamber group has a plurality of gunpowder chambers, and each of the gunpowder chambers contains ignition powder and ignition powder; The tube body is sleeved outside the electrode tube group and the powder chamber group, and the electrode tube group abuts against the ignition powder; The electrode tube group is used to ignite the ignition powder in a plurality of the powder chambers simultaneously or in stages.

2. The electric ignition tube according to claim 1, characterized in that: The electrode tube group includes a first heating circuit and a second heating circuit, and the gunpowder chamber group includes a first gunpowder chamber and a second gunpowder chamber; The first heating circuit is used to ignite the ignition powder in the first gunpowder chamber, and the second heating circuit is used to ignite the ignition powder in the second gunpowder chamber.

3. The electric ignition tube according to claim 2, characterized in that: The gunpowder chamber group includes a main body, a partition is arranged in the main body, and the partition divides the main body into the first gunpowder chamber and the second gunpowder chamber; The electrode tube assembly extends into the main tube and abuts against the ignition powder in the first powder chamber and the second powder chamber.

4. The electric ignition tube according to claim 2, characterized in that: The gunpowder chamber group includes a heat insulating member and two gunpowder placing tubes; The two charge placing tubes are respectively provided with the first gunpowder chamber and the second gunpowder chamber, and the two charge placing tubes are separated by the heat insulating member; The electrode tube group extends into the two powder placement tubes and abuts against the ignition powder in the first powder chamber and the second powder chamber.

5. The electric ignition tube according to claim 2, characterized in that: The first heating circuit includes a first electrode and a first heating bridge wire, the second heating circuit includes a second electrode and a second heating bridge wire, and the electrode tube group also includes a connecting electrode; The first electrode, the connecting electrode and the first heating bridge wire are connected in sequence; the second electrode, the connecting electrode and the second heating bridge wire are connected in sequence; Wherein, the first heating bridge wire is in contact with the ignition powder in the first gunpowder chamber, and the second heating bridge wire is in contact with the ignition powder in the second gunpowder chamber.

6. The electric ignition tube according to claim 5, characterized in that: The first electrode and the second electrode are arranged around the connecting electrode, or the first electrode, the second electrode and the connecting electrode are arranged at intervals around the same axis.

7. The electric ignition tube according to claim 5, characterized in that: The electrode tube assembly further includes an insulator covering at least one of the first electrode, the second electrode, and the connecting electrode to separate the first electrode, the second electrode, and the connecting electrode.

8. The electric ignition tube according to claim 5, characterized in that: The connecting electrode comprises a first connecting electrode and a second connecting electrode; the first electrode, the first connecting electrode and the first heating bridge wire are connected in sequence; the second electrode, the second connecting electrode and the second heating bridge wire are connected in sequence; Wherein, the first heating bridge wire is in contact with the ignition powder in the first gunpowder chamber, and the second heating bridge wire is in contact with the ignition powder in the second gunpowder chamber.

9. The electric ignition tube according to claim 8, characterized in that: The first electrode, the second electrode, the first connecting electrode and the second connecting electrode are arranged at intervals around the same axis.

10. A gas generator, characterized in that: The gas generator comprises a main body and an electric ignition tube as claimed in any one of claims 1 to 9; The main body is provided with at least two combustion chambers for accommodating gas-producing agents, and the two gunpowder chambers of the electric ignition tube correspond to one combustion chamber respectively, and the ignition powder in each gunpowder chamber is used to ignite the gas-producing agent in the corresponding combustion chamber.

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