Miniaturized high-strength electric ignition tube for automobile side safety air bag

Abstract

The utility model discloses a miniaturized high-strength electric ignition tube for an automobile side safety air bag, which comprises a tube shell in which ignition powder, ignition powder and an electrode plug assembly are arranged, and is characterized in that a plastic sleeve is wrapped outside the tube shell, a nylon wrapping body is wrapped outside the plastic sleeve, and the nylon wrapping body wraps the plastic sleeve and two electrodes of the electrode plug assembly into a whole in an injection molding manner; and the total charge amount of the ignition powder and the ignition powder is greater than or equal to 260mg. The electrode plug assembly is reduced through the design of the ring electrode, the whole ignition tube is ingenious in structural design and high in strength, the requirements for miniaturization and high strength of the electric ignition tube of a columnar generator for the side face air bag are met, and the ignition tube can be successfully applied to products of automobile side air curtains and wind shielding air bags.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile passive safety systems and relates to a miniaturized high-strength electric igniter for automobile side safety airbags. Background Art

[0002] With the rapid development of the automobile industry, automobile safety technology has received much attention. Automobile airbag products are currently a major automobile safety technology. In the automobile airbag system, the gas generator is a very important component. Its function is to generate an appropriate amount of gas at a specified speed and specified gas mass flow rate to fill the airbag. In its internal design structure, the electric ignition tube is its only initial ignition element, which directly affects the main technical indicators of the airbag, such as inflation time and inflation pressure.

[0003] With the vigorous development, promotion and application of automobile airbag products, the types and uses of automobile airbag products are increasing. Traditional airbag products are mainly used to protect the safety of drivers in the car, including main airbags, knee airbags, etc. In recent years, domestic and foreign airbag manufacturers, such as BYD, JSS and other companies, have increased their efforts in the research and development of airbag products, so that the airbag can not only protect the driver in the car, but also protect other people in the car and people outside the car. The main products include side airbags, curtain airbags, and windshield airbags. These airbag products require higher inflation speed, inflation pressure and inflation volume. Electric ignition tubes of conventional size and performance can no longer meet the above requirements. Utility Model Content

[0004] The purpose of the utility model is to provide a miniaturized high-strength electric ignition tube for a side safety airbag of an automobile, thereby solving the problem of insufficient strength performance of conventional electric ignition tubes.

[0005] The technical solution adopted by the utility model is to provide a miniaturized high-strength electric ignition tube for a side airbag of an automobile, comprising a tube shell, wherein an ignition powder, an ignition powder and an electrode plug assembly are contained in the tube shell, the tube shell is wrapped with a plastic sleeve, the plastic sleeve is wrapped with a nylon sheath, and the nylon sheath injection-moldes the plastic sleeve and the two electrodes of the electrode plug assembly into one body, and the total charge amount of the ignition powder and the ignition powder is 100mg to 400mg.

[0006] The utility model is also characterized in that:

[0007] The electrode plug assembly includes a ring electrode, a long electrode and a short electrode. The upper end face of the ring electrode contacts the nylon sheath, and the lower end face of the ring electrode contacts the ignition powder. The ring electrode is ring-shaped, and a cylindrical sintered glass body is arranged along the axis of the center of the ring electrode. The outer wall of the sintered glass body contacts the inner wall of the ring electrode, and one end of the sintered glass body is flush with the lower end face of the ring electrode, and the other end is lower than the upper end face of the ring electrode.

[0008] The long electrode is inserted into the sintered glass body, and one end of the long electrode inserted into the sintered glass body remains flush with the lower end face of the ring electrode. The other end of the long electrode extends out of the sintered glass body and the nylon sheath in sequence. One end of the short electrode is fixed to the upper end face of the ring electrode, and the other end of the short electrode extends out of the nylon sheath.

[0009] The long electrode and the short electrode are metal electrodes, and the surfaces of the long electrode and the short electrode are uniformly plated with a gold layer.

[0010] The tube shell and the ring electrode are fixed by laser welding, and the tube shell and the ring electrode are interference fit.

[0011] A glowing bridge wire is welded to one end of the long electrode that is flush with the ring electrode, and the other end of the glowing bridge wire is welded to the ring electrode to form a conductive path.

[0012] The glowing bridge wire is in direct and close contact with the ignition charge in the tube shell, and the ignition charge is in direct and close contact with the ignition charge.

[0013] The glow bridge wire is a resistance alloy wire with a diameter of 0.015mm to 0.028mm and a resistance of 2.0Ω±0.3Ω.

[0014] The plastic sleeve is an injection molded insulating material.

[0015] The nylon sheath is a PA66 sheath with a glass fiber content of 25% to 50%.

[0016] The beneficial effects of the utility model are:

[0017] The utility model discloses a miniaturized high-strength electric igniter for automobile side airbags. The design of the ring electrode reduces the size of the electrode plug assembly. The structural design of the entire igniter is ingenious and has high strength, which meets the requirements of the columnar generator for side airbags for miniaturization and high strength of the electric igniter. The utility model can be successfully applied to automobile side air curtains and windshield airbags. The utility model has high strength, low cost, good processability, stable quality, reliable output performance and safety performance, good sealing, is non-toxic, pollution-free, and is beneficial to the environment. It is convenient for automated mass production, and the environmental testing, ignition reliability and safety meet the US USCAR-28 standard and the European AK-LV16 standard. It is mainly used for gas generators for airbags. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a miniaturized high-strength electric igniter for a vehicle side airbag according to the utility model;

[0019] Figure 2 This is a schematic structural diagram of the tube shell of the miniaturized high-strength electric ignition tube for automobile side airbags of the utility model;

[0020] Figure 3This is a front view of the electrode plug assembly in the miniaturized high-strength electric ignition tube for the side airbag of an automobile according to the present invention;

[0021] Figure 4 This is a bottom view of the electrode plug assembly in the miniaturized high-strength electric ignition tube for the side airbag of an automobile according to the present invention;

[0022] Figure 5 The utility model is a pressure curve diagram after ignition of a miniaturized high-strength electric igniter for a side safety airbag of an automobile.

[0023] In the figure, 1. electrode plug assembly, 2. long electrode, 3. short electrode, 4. ring electrode, 5. sintered glass body, 6. glowing bridge wire, 7. ignition powder, 8. ignition powder, 9. tube shell, 10. plastic sleeve, 11. nylon sheath. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] Example 1

[0026] The present embodiment provides a miniaturized high-strength electric ignition tube for a side airbag of an automobile, comprising a tube shell 9. The tube shell 9 is in the shape of a thin-walled cylindrical tube, and the opening of the tube shell 9 is turned outward. The tube shell 9 is filled with ignition powder 7, ignition powder 8 and an electrode plug assembly 1. The tube shell 9 is wrapped with a plastic sleeve 10, and the plastic sleeve 10 is wrapped with a nylon coating 11. The nylon coating 11 injection-moldes the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one. The total charge of the ignition powder 7 and the ignition powder 8 is 100 mg. The ignition powder 7 is assembled in one step, and the ignition powder 8 is assembled in one step.

[0027] Example 2

[0028] This embodiment provides a miniaturized high-strength electric ignition tube for a side airbag of an automobile, comprising a tube shell 9, in which ignition powder 7, ignition powder 8 and an electrode plug assembly 1 are contained. The tube shell 9 is wrapped with a plastic sleeve 10, which is injection-molded from a high-temperature resistant and high-strength insulating material, such as nylon. The plastic sleeve 10 is wrapped with a nylon coating 11, which injection-molds the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one. The total charge of the ignition powder 7 and the ignition powder 8 is 400 mg.

[0029] The electrode plug assembly 1 includes a ring electrode 4, a long electrode 2 and a short electrode 3. The upper end face of the ring electrode 4 contacts the nylon sheath 11, and the lower end face of the ring electrode 4 contacts the ignition powder 8. The ring electrode 4 is ring-shaped, and a cylindrical sintered glass body 5 is arranged along the axis of the center of the ring electrode 4. The outer wall of the sintered glass body 5 contacts the inner wall of the ring electrode 4, and one end of the sintered glass body 5 is flush with the lower end face of the ring electrode 4, and the other end is lower than the upper end face of the ring electrode 4.

[0030] Example 3

[0031] This embodiment provides a miniaturized high-strength electric ignition tube for a side airbag of an automobile, comprising a tube shell 9, in which ignition powder 7, ignition powder 8 and an electrode plug assembly 1 are contained. The tube shell 9 is wrapped with a plastic sleeve 10, and the plastic sleeve 10 is wrapped with a nylon sheath 11. The nylon sheath 11 is an insulating material that is resistant to high temperatures, has low water absorption, and has high strength and impact toughness. The nylon sheath 11 injection-moldes the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one. The total charge of the ignition powder 7 and the ignition powder 8 is 260 mg.

[0032] The electrode plug assembly 1 includes a ring electrode 4, a long electrode 2 and a short electrode 3. The upper end face of the ring electrode 4 contacts the nylon sheath 11, and the lower end face of the ring electrode 4 contacts the ignition powder 8. The ring electrode 4 is ring-shaped, and a cylindrical sintered glass body 5 is arranged along the axis of the center of the ring electrode 4. The outer wall of the sintered glass body 5 contacts the inner wall of the ring electrode 4, and one end of the sintered glass body 5 is flush with the lower end face of the ring electrode 4, and the other end is lower than the upper end face of the ring electrode 4.

[0033] The long electrode 2 is inserted into the sintered glass body 5, and one end of the long electrode 2 inserted into the sintered glass body 5 remains flush with the lower end surface of the ring electrode 4. The other end of the long electrode 2 extends out of the sintered glass body 5 and the nylon sheath 11 in sequence. One end of the short electrode 3 is fixed to the upper end surface of the ring electrode 4, and the other end of the short electrode 3 extends out of the nylon sheath 11.

[0034] Example 4

[0035] This embodiment provides a miniaturized high-strength electric ignition tube for a side airbag of an automobile, comprising a tube shell 9, in which ignition powder 7, ignition powder 8 and an electrode plug assembly 1 are contained. The tube shell 9 is wrapped with a plastic sleeve 10, and the plastic sleeve 10 is wrapped with a nylon sheath 11. The nylon sheath 11 injection-moldes the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one. The total charge of the ignition powder 7 and the ignition powder 8 is 260 mg.

[0036] The electrode plug assembly 1 includes a ring electrode 4, a long electrode 2 and a short electrode 3. The upper end face of the ring electrode 4 contacts the plastic sleeve, and the lower end face of the ring electrode 4 contacts the ignition powder 8. The ring electrode 4 is ring-shaped, and a cylindrical sintered glass body 5 is arranged along the axis of the center of the ring electrode 4. The outer wall of the sintered glass body 5 contacts the inner wall of the ring electrode 4, and one end of the sintered glass body 5 is flush with the lower end face of the ring electrode 4, and the other end is lower than the upper end face of the ring electrode 4.

[0037] The long electrode 2 is inserted into the sintered glass body 5. One end of the long electrode 2 inserted into the sintered glass body 5 is flush with the lower end surface of the ring electrode 4. The other end of the long electrode 2 extends out of the sintered glass body 5 and the nylon sheath 11. One end of the short electrode 3 is fixed to the upper end surface of the ring electrode 4, and the other end of the short electrode 3 extends out of the nylon sheath 11. The long electrode 2 and the short electrode 3 are metal electrodes, and their surfaces are evenly plated with a gold layer.

[0038] Example 5

[0039] This embodiment provides a miniaturized high-strength electric ignition tube for a side airbag of an automobile, comprising a tube shell 9, in which ignition powder 7, ignition powder 8 and an electrode plug assembly 1 are contained. The tube shell 9 is wrapped with a plastic sleeve 10, and the plastic sleeve 10 is wrapped with a nylon sheath 11. The nylon sheath 11 injection-moldes the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one. The total charge of the ignition powder 7 and the ignition powder 8 is 265 mg.

[0040] The electrode plug assembly 1 includes a ring electrode 4, a long electrode 2, and a short electrode 3. The upper end of the ring electrode 4 contacts the nylon sheath 11, and the lower end contacts the ignition charge 8. The ring electrode 4 is annular, with a cylindrical sintered glass body 5 disposed along its axis. The outer wall of the sintered glass body 5 contacts the inner wall of the ring electrode 4, and one end of the sintered glass body 5 is flush with the lower end of the ring electrode 4, while the other end is lower than the upper end of the ring electrode 4. The tube shell 9 and the ring electrode 4 are fixed by laser welding, and the tube shell 9 and the ring electrode 4 have an interference fit.

[0041] Example 6

[0042] This embodiment provides a miniaturized high-strength electric ignition tube for a side airbag of an automobile, comprising a tube shell 9, in which an ignition powder 7, an ignition powder 8 and an electrode plug assembly 1 are contained. The tube shell 9 is wrapped with a plastic sleeve 10, and the plastic sleeve 10 is wrapped with a nylon sheath 11. The nylon sheath 11 injection-moldes the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one. The total charge of the ignition powder 7 and the ignition powder 8 is 300 mg.

[0043] The electrode plug assembly 1 includes a ring electrode 4, a long electrode 2 and a short electrode 3. The upper end face of the ring electrode 4 contacts the nylon sheath 11, and the lower end face of the ring electrode 4 contacts the ignition powder 8. The ring electrode 4 is ring-shaped, and a cylindrical sintered glass body 5 is arranged along the axis of the center of the ring electrode 4. The outer wall of the sintered glass body 5 contacts the inner wall of the ring electrode 4, and one end of the sintered glass body 5 is flush with the lower end face of the ring electrode 4, and the other end is lower than the upper end face of the ring electrode 4. A glowing bridge wire 6 is welded to one end of the long electrode 2 flush with the ring electrode 4, and the other end of the glowing bridge wire 6 is welded to the ring electrode 4 to form a conductive path. The glowing bridge wire 6 is a resistance alloy wire with a diameter of 0.015 mm and a resistance of 2.0 Ω. The glowing bridge wire 6 is in direct and close contact with the ignition powder 8 in the tube shell 9, and the ignition powder 8 is in direct and close contact with the ignition powder 7. The sensitivity of the ignition powder 8 is moderate, meeting the ignition current and safety current requirements. The output energy of the ignition powder 7 is sufficient and stable, which is convenient for reliable ignition of the next level of charge.

[0044] Example 7

[0045] The present embodiment provides a miniaturized high-strength electric ignition tube for a side airbag of an automobile, comprising a tube shell 9, in which an ignition powder 7, an ignition powder 8 and an electrode plug assembly 1 are contained. The tube shell 9 is wrapped with a plastic sleeve 10, which is an injection-molded body of an insulating material. The plastic sleeve 10 is wrapped with a nylon sheath 11, which injection-moldes the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one body. The nylon sheath 11 is a PA66 sheath with a glass fiber content of 50%. The total charge of the ignition powder 7 and the ignition powder 8 is 270 mg.

[0046] Example 8

[0047] This embodiment provides a miniaturized high-strength electric igniter for automobile side airbags, such as Figure 1 As shown, it includes a tube shell 9, as Figure 2 As shown, the tube shell 9 is filled with ignition powder 7, ignition powder 8 and electrode plug assembly 1, and the tube shell 9 is wrapped with a plastic sleeve 10. The plastic sleeve 10 is an injection-molded body of insulating material. The plastic sleeve 10 is wrapped with a nylon coating 11. The nylon coating 11 is a PA66 coating with a glass fiber content of 25%. The nylon coating 11 injection-moldes the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one. The total charge of the ignition powder 7 and the ignition powder 8 is 260 mg.

[0048] like Figure 3-4As shown, the electrode plug assembly 1 includes a ring electrode 4, a long electrode 2 and a short electrode 3. The tube shell 9 is fixed to the ring electrode 4 by laser welding, and the tube shell 9 and the ring electrode 4 are interference fit. The upper end face of the ring electrode 4 is in contact with the plastic sleeve, and the lower end face of the ring electrode 4 is in contact with the ignition powder 8. The ring electrode 4 is annular, and a cylindrical sintered glass body 5 is provided in the center of the ring electrode 4 along its axis. The outer wall of the sintered glass body 5 is in contact with the inner wall of the ring electrode 4, and one end of the sintered glass body 5 is flush with the lower end face of the ring electrode 4, and the other end is lower than the upper end face of the ring electrode 4.

[0049] Long electrode 2 is inserted into sintered glass body 5. One end of long electrode 2 inserted into sintered glass body 5 is flush with the lower end of ring electrode 4. The other end of long electrode 2 extends out of sintered glass body 5 and nylon sheath 11, respectively. A glow-wire 6 is welded to the end of long electrode 2 flush with ring electrode 4. The other end of glow-wire 6 is welded to ring electrode 4, forming a conductive path. Glow-wire 6 is in direct and close contact with ignition powder 8 within tube shell 9, which in turn is in direct and close contact with ignition powder 7. Glow-wire 6 is a resistance alloy wire with a diameter of 0.028 mm and a resistance of 2.3 Ω. One end of short electrode 3 is fixed to the upper end of ring electrode 4, the other end of short electrode 3 extending out of nylon sheath 11. Long electrode 2 and short electrode 3 are metal electrodes, and their surfaces are uniformly plated with gold.

[0050] Example 9

[0051] This embodiment provides a miniaturized high-strength electric igniter for automobile side airbags, including a tube shell 9, such as Figure 2 As shown, the tube shell 9 is filled with ignition powder 7, ignition powder 8 and electrode plug assembly 1, and the tube shell 9 is wrapped with a plastic sleeve 10. The plastic sleeve 10 is an injection-molded body of insulating material. The plastic sleeve 10 is wrapped with a nylon sheath 11. The nylon sheath 11 is a PA66 sheath with a glass fiber content of 45%. The nylon sheath 11 injection-moldes the plastic sleeve 10 and the two electrodes of the electrode plug assembly 1 into one. The total charge of the ignition powder 7 (ZPP) and the ignition powder 8 is 270 mg.

[0052] The electrode plug assembly 1 includes a ring electrode 4, a long electrode 2 and a short electrode 3. The tube shell 9 is fixed to the ring electrode 4 by laser welding, and the tube shell 9 and the ring electrode 4 are interference fit. The upper end face of the ring electrode 4 is in contact with the plastic sleeve, and the lower end face of the ring electrode 4 is in contact with the ignition powder 8. The ring electrode 4 is annular, and a cylindrical sintered glass body 5 is arranged in the center of the ring electrode 4 along its axis. The outer wall of the sintered glass body 5 is in contact with the inner wall of the ring electrode 4, and one end of the sintered glass body 5 is flush with the lower end face of the ring electrode 4, and the other end is lower than the upper end face of the ring electrode 4.

[0053] Long electrode 2 is inserted into sintered glass body 5. One end of long electrode 2 inserted into sintered glass body 5 is flush with the lower end of ring electrode 4. The other end of long electrode 2 extends out of sintered glass body 5 and nylon sheath 11, respectively. A glow-wire 6 is welded to the end of long electrode 2 flush with ring electrode 4. The other end of glow-wire 6 is welded to ring electrode 4, forming a conductive path. Glow-wire 6 is in direct and close contact with ignition powder 8 within tube shell 9, which in turn is in direct and close contact with ignition powder 7. Glow-wire 6 is a resistance alloy wire with a diameter of 0.020 mm and a resistance of 1.7 Ω. One end of short electrode 3 is fixed to the upper end of ring electrode 4, the other end of short electrode 3 extending out of nylon sheath 11. Long electrode 2 and short electrode 3 are metal electrodes, and their surfaces are uniformly plated with gold.

[0054] During the manufacturing process of the miniaturized high-strength electric ignition tube for automobile side airbags of the present invention, the ignition powder 7 is first loaded into the tube shell 9, and the assembly of the ignition powder 8 is completed for the second time. The electric ignition tube adopts a two-loading and two-pressing method to meet its powder quantity specifications. Then, the electrode plug assembly 1 is assembled with the tube shell 9 containing the powder, and laser welding is adopted for sealing welding. The welding position is on the side of the tube shell 9.

[0055] The advantages of the miniaturized high-strength electric igniter for automobile side airbags of the utility model are:

[0056] First, the overall size of the electrode plug design is reduced, especially the body ring thickness and outer diameter, which are 10% to 20% smaller than conventional designs. Second, the tube shell is made of stainless steel with a low carbon content, which improves workability and weldability. Furthermore, the tube shell wall thickness is increased, 15% to 25% thicker than conventional electric ignition tubes. Finally, the tube shell mouth adopts a flanged design to increase the contact area with the injection molding material and improve the product's structural strength. Third, the injection molding material is PA66 with a glass fiber content of approximately 25% to 50%. This high glass fiber content enhances the inherent strength of the injection molding body. Fourth, the total charge of ignition powder 8 and ignition powder 7 reaches 100mg to 400mg. Automatic charging equipment is used to complete the charge assembly through a two-loading, two-pressing process (one press-loading for ignition powder 8, and one press-loading for ignition powder 7).

[0057] The functional indicators of the miniaturized high-strength electric igniter for automobile side airbags are as follows: when kept at -40℃, +23℃ and +90℃ for not less than 4 hours, assembled in a 10mL sealed container, and supplied with a DC current of 1.20A, it should ignite reliably, with an ignition time of less than 2.0ms, a rise time of less than 2.0ms, a peak pressure of 6.9MPa~11.2MPa, and a curve as shown in FIG. Figure 5 shown.

[0058] The strength index of the miniaturized high-strength electric ignition tube for automobile side airbags of this utility model is maintained at temperatures of -40℃, +23℃, and +90℃ for no less than 4 hours. It is assembled in a 10mL sealed initiator and passed with a DC current of 1.20A for structural strength testing. When the electric ignition tube withstands a peak pressure of no less than 206MPa, defects such as injection molded body cracks, ablation, tube shell shedding, and electrode needle shedding are not allowed.

Claims

1. A miniaturized high-strength electric igniter for a side airbag of an automobile, comprising a tube shell (9), wherein the tube shell (9) is filled with ignition powder (7), ignition powder (8) and an electrode plug assembly (1), characterized in that: The tube shell (9) is wrapped with a plastic sleeve (10), and the plastic sleeve (10) is wrapped with a nylon coating (11). The nylon coating (11) injection-moldes the plastic sleeve (10) and the two electrodes of the electrode plug assembly (1) into one body. The total charge amount of the ignition powder (7) and the ignition powder (8) is greater than or equal to 260 mg.

2. The miniaturized high-strength electric igniter for automobile side airbags according to claim 1, characterized in that: The electrode plug assembly (1) comprises a ring electrode (4), a long electrode (2) and a short electrode (3), the upper end face of the ring electrode (4) contacts the plastic sleeve, the lower end face of the ring electrode (4) contacts the ignition powder (8), the ring electrode (4) is ring-shaped, and a cylindrical sintered glass body (5) is provided at the center of the ring electrode (4) along its axis, the outer wall of the sintered glass body (5) contacts the inner wall of the ring electrode (4), and one end of the sintered glass body (5) is flush with the lower end face of the ring electrode (4), and the other end is lower than the upper end face of the ring electrode (4).

3. The miniaturized high-strength electric igniter for automobile side airbags according to claim 2, characterized in that: The long electrode (2) is inserted into the sintered glass body (5), and one end of the long electrode (2) inserted into the sintered glass body (5) is kept flush with the lower end surface of the ring electrode (4), and the other end of the long electrode (2) extends out of the sintered glass body (5) and the nylon sheath (11) in sequence. One end of the short electrode (3) is fixed to the upper end surface of the ring electrode (4), and the other end of the short electrode (3) extends out of the nylon sheath (11).

4. The miniaturized high-strength electric igniter for automobile side airbags according to claim 3, characterized in that: The long electrode (2) and the short electrode (3) are metal electrodes, and the surfaces of the long electrode (2) and the short electrode (3) are uniformly plated with a gold layer.

5. The miniaturized high-strength electric igniter for automobile side airbag according to claim 2, characterized in that: The tube shell (9) and the ring electrode (4) are fixed by laser welding, and the tube shell (9) and the ring electrode (4) are interference fit.

6. The miniaturized high-strength electric igniter for automobile side airbags according to claim 2, characterized in that: A glowing bridge wire (6) is welded to one end of the long electrode (2) flush with the ring electrode (4), and the other end of the glowing bridge wire (6) is welded to the ring electrode (4) to form a conductive path.

7. The miniaturized high-strength electric igniter for automobile side airbags according to claim 6, characterized in that: The glowing bridge wire (6) is in direct and close contact with the ignition powder (8) in the tube shell (9), and the ignition powder (8) is in direct and close contact with the ignition powder (7).

8. The miniaturized high-strength electric igniter for automobile side airbags according to claim 6, characterized in that: The glow bridge wire (6) is a resistance alloy wire with a diameter of 0.015 mm to 0.028 mm and a resistance of 2.0 Ω ± 0.3 Ω.

9. The miniaturized high-strength electric igniter for automobile side airbags according to claim 1, characterized in that: The plastic sleeve (10) is an injection-molded body of insulating material.

10. The miniaturized high-strength electric igniter for automobile side airbag according to claim 1, characterized in that: The nylon sheath (11) is a PA66 sheath with a glass fiber content of 25% to 50%.

Images