CN215752300U - Pyrotechnic composition type gas generator for side airbag - Google Patents
Pyrotechnic composition type gas generator for side airbag Download PDFInfo
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- CN215752300U CN215752300U CN202121799885.8U CN202121799885U CN215752300U CN 215752300 U CN215752300 U CN 215752300U CN 202121799885 U CN202121799885 U CN 202121799885U CN 215752300 U CN215752300 U CN 215752300U
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Abstract
The utility model discloses a pyrotechnic gas generator for a side airbag, which comprises an igniter seat, an igniter, a gas generating agent, a gas guide cover, a shell and an end cover, wherein the igniter is arranged on the igniter seat; the ignition tool seat is connected to the rear end of the interior of the shell, and the ignition tool is arranged at the front end of the ignition tool seat; the air guide cover is in a cylindrical shape with an opening at the front end and is inserted into and fixedly connected with the inner front end of the shell; the air guide cover is provided with a plurality of air guide holes; the end cover covers the front end opening of the shell and is fixedly connected with the shell; the end cover is provided with a plurality of exhaust holes; the gas producing medicine is filled in the shell between the igniter and the gas guide cover. The gas generator can be beneficial to cooling gas and can fix residues generated by gas production medicines through the arrangement of the gas guide holes of the gas guide cover and the gas discharge holes on the end cover, thereby reducing the damage of the gas to the air bag due to high temperature and residues; the side airbag has the characteristics of simple structure, small diameter, low material cost and the like, and can effectively prolong the service life of the side airbag and improve the protection effect.
Description
Technical Field
The utility model relates to a vehicle safety device, in particular to a pyrotechnic gas generator for a side airbag.
Background
The automobile safety airbag mainly comprises a controller (ECU), an airbag module, a gas generator, a wire harness and other parts. An automobile side impact air bag (SAB), referred to as a side air bag, is mounted on the outside of a seat to mitigate injury caused by a side impact. When the automobile collides, the ECU judges the collision degree, transmits and sends signals; the SAB gas generator generates an ignition action according to the signal indication, ignites the solid fuel and generates gas to inflate the side air bag, so that the side air bag is rapidly expanded, and the safety of a driver and a passenger in a copilot is protected. When the automobile is seriously impacted in the lateral direction, the side air bag can relieve the direct hard collision between the arms and the ribs of the bodies of the driver and the copilot passengers close to the automobile door, and the door plate, so that the serious body injuries such as fracture and the like are avoided. The existing gas generator for the side air bag in the market has the defects of complex structure, large volume, high cost and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pyrotechnic gas generator for a side airbag, which has a simple structure and a good effect.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: it comprises an igniter base, an igniter, a gas producing medicine, a gas guide cover, a shell and an end cover; the ignition tool seat is connected to the rear end of the interior of the shell, and the ignition tool is arranged at the front end of the ignition tool seat; the air guide cover is in a cylindrical shape with an opening at the front end and is inserted into and fixedly connected with the inner front end of the shell; the air guide cover is provided with a plurality of air guide holes; the end cover covers the front end opening of the shell and is fixedly connected with the shell; the end cover is provided with a plurality of exhaust holes; the gas producing medicine is filled in the shell between the igniter and the gas guide cover.
The air guide cover is provided with an aluminum foil covering the air guide hole.
The outer ring of the igniter base is provided with a circle of groove; the shell is provided with a circle of inward-contracting bulges matched with the grooves. A first sealing ring is arranged between the groove and the inward-contracting bulge.
The gas production medicine comprises a gas production medicine A and a gas production medicine B, and a partition plate is arranged between the gas production medicine A and the gas production medicine B; the clapboard is provided with a vent hole.
The inner rear end of the igniter base is provided with a short circuit ring.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the utility model receives the ignition electric pulse sent by the ECU and then detonates the ignition tool, the high-temperature and high-pressure energetic substance generated by the ignition tool quickly ignites the gas production medicine, and the gas production medicine is quickly combusted to generate non-toxic and harmless gas to open the air bag and fully inflate the air bag. According to the utility model, through the arrangement of the air guide hole of the air guide cover and the air exhaust hole on the end cover, the cooling of the gas can be facilitated, and the residue generated by the gas production medicine can be fixed, so that the damage of the gas to the air bag due to high temperature and the residue contained in the gas is reduced, and the service life of the side air bag is effectively prolonged. The utility model has the characteristics of simple structure, small diameter, low material cost and the like, and can effectively prolong the service life of the side airbag and improve the protection effect.
According to the utility model, the gas production medicine is sealed from the outside through the arrangement of the sealing ring and the aluminum foil, so that the gas production medicine is effectively prevented from being affected with damp in the service life cycle of the product.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
In the figure: a short circuit ring 1; an igniter base 2; an igniter 3; a partition plate 4; a housing 5; a gas guide hood 6; an air-guide hole 7; an aluminum foil 8; an exhaust hole 9; an end cap 10; gas generant composition B11; gas generant composition a 12; a second seal ring 13; a groove 14; a retraction boss 15; a first seal ring 16.
Detailed Description
As shown in fig. 1, the pyrotechnic gas generator for a side airbag includes an igniter base 2, an igniter 3, a gas generating agent, a gas leading cover 6, a housing 5, and an end cap 10. The shell 5 is of a cylindrical structure, and the igniter base 2 is positioned at the rear end inside the shell 5; as shown in fig. 2, a circle of groove 14 is formed on the outer ring of the igniter base 2, and a circle of inward-contracting protrusion 15 which is inwardly contracted is formed on the shell 5 at a position corresponding to the groove 14; the groove 14 and the inward-contracting bulge 15 are matched to clamp the ignition tool seat 2 in the shell 5. A first sealing ring 16, preferably an O-ring, is provided between the recess 14 and the inwardly extending protrusion 15 to seal the clamping connection between the igniter base 2 and the housing 5. The igniter 3 is arranged at the front end of the igniter base 2, and a second sealing ring 13, preferably an O-shaped sealing ring, is arranged between the igniter 3 and the igniter base 2; the inner rear end of the ignition tool seat 2 is provided with a short circuit ring 1; the lead of the igniter 3 passes through and extends out of the igniter base 2 and the short circuit ring 1; the short circuit ring 1 can avoid mistaken explosion, so that the safety of the generator before transportation and assembly is ensured.
As shown in fig. 1, in the gas generator for a pyrotechnic side airbag, the gas guide cover 6 is a cylinder with an open front end, and a plurality of gas guide holes 7 penetrating the cylinder wall are formed in the side cylinder wall of the gas guide cover 6; a layer of aluminum foil 8 is adhered on the side cylinder wall of the air guide cover 6 to cover the air guide hole 7; the scoop 6 is inserted into the inner front end of the housing 5. The end cap 10 covers the front opening of the housing 5. The outer diameter of the opening end of the end cover 10 is matched with the inner diameter of the shell 5, and the outer diameter of the air guide cover 6 is matched with the inner diameter of the opening end of the end cover 10; the open end of the end cover 10 is inserted backwards into the front end opening of the shell 5 and is welded together by laser; the open end of the air guide cover 6 extends forwards into the opening of the end cover 10 and is welded together by laser; thus, the housing 5, the scoop 6 and the end cap 10 are fixedly connected to form an integral structure. The side wall of the end cover 10 positioned at the outer part of the shell 5 is provided with a plurality of exhaust holes 9, and the exhaust holes 9 penetrate through the end cover 10.
As shown in fig. 1, the gas generant of the pyrotechnic gas generator for a side airbag comprises a gas generant a12 and a gas generant B11; wherein, the gas production medicine A12 is inflammable gas production medicine, and the gas production medicine B11 is nonflammable gas production medicine with large gas production amount and less residue; the gas production medicine A12 and the gas production medicine B11 are filled in the shell 5 between the igniter 3 and the gas guide sleeve 6 from front to back; a partition plate 4 is arranged between the gas producing medicine A12 and the gas producing medicine B11, and the partition plate 4 is provided with a vent hole penetrating through the plate body.
As shown in fig. 1, the gas generating process of the pyrotechnic side air bag gas generator is as follows: after receiving an ignition electric pulse sent by the ECU, the ignition electric pulse detonates the ignition tool 3 through a lead wire, the high-temperature high-pressure energetic substance generated by the ignition tool 3 quickly ignites the gas production medicine A12, and the gas production medicine B11 is ignited after the gas production medicine A12 is ignited; the gas producing medicine is quickly combusted to produce nontoxic and harmless high-temperature gas; the high-temperature gas breaks through the aluminum foil 8, then rushes out from the gas guide hole 7 of the gas guide cover 6, and then rushes out from the exhaust hole 9 of the end cover 10 and enters the airbag bag, so that the airbag bag is quickly opened and fully filled; the high-temperature gas can generate the change of the flow direction when flowing through the gas guide hole 7 and the exhaust hole 9, a certain cooling effect can be generated on the high-temperature gas in the process, and residues generated by combustion of gas producing medicaments in the high-temperature gas can be intercepted, so that the impact and damage of the high temperature and the residues on the airbag are effectively avoided.
Claims (6)
1. A pyrotechnic gas generator for a side airbag, characterized in that: which comprises an igniter base (2), an igniter (3), a gas producing medicine, a gas guide cover (6), a shell (5) and an end cover (10); the ignition tool seat (2) is connected to the rear end of the interior of the shell (5), and the ignition tool (3) is arranged at the front end of the ignition tool seat (2); the air guide cover (6) is in a cylindrical shape with an opening at the front end and is inserted into and fixedly connected with the inner front end of the shell (5); the air guide cover (6) is provided with a plurality of air guide holes (7); the end cover (10) covers the front end opening of the shell (5) and is fixedly connected with the shell (5); the end cover (10) is provided with a plurality of exhaust holes (9); the gas producing medicine is filled in the shell (5) between the igniter (3) and the gas guide cover (6).
2. The pyrotechnic side air bag gas generator as claimed in claim 1, wherein: and the air guide cover (6) is provided with an aluminum foil (8) which covers the air guide hole (7).
3. The pyrotechnic side air bag gas generator as claimed in claim 1, wherein: the outer ring of the ignition tool seat (2) is provided with a circle of groove (14); the shell (5) is provided with a circle of inward-contracting bulges (15) matched with the grooves.
4. A pyrotechnic side air bag gas generator as claimed in claim 3, wherein: a first sealing ring (16) is arranged between the groove and the inward-contracting bulge.
5. The pyrotechnic side air bag gas generator as claimed in claim 1, wherein: the gas production medicine comprises a gas production medicine A (12) and a gas production medicine B (11), and a partition plate (4) is arranged between the gas production medicine A (12) and the gas production medicine B (11); the clapboard (4) is provided with a vent hole.
6. A pyrotechnic side air bag gas generator as claimed in any one of claims 1 to 5 wherein: the inner rear end of the igniter base (2) is provided with a short circuit ring (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121799885.8U CN215752300U (en) | 2021-08-03 | 2021-08-03 | Pyrotechnic composition type gas generator for side airbag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121799885.8U CN215752300U (en) | 2021-08-03 | 2021-08-03 | Pyrotechnic composition type gas generator for side airbag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215752300U true CN215752300U (en) | 2022-02-08 |
Family
ID=80109569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121799885.8U Active CN215752300U (en) | 2021-08-03 | 2021-08-03 | Pyrotechnic composition type gas generator for side airbag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215752300U (en) |
-
2021
- 2021-08-03 CN CN202121799885.8U patent/CN215752300U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A gas generator for pyrotechnic side airbags Effective date of registration: 20230524 Granted publication date: 20220208 Pledgee: Bank of Handan Limited by Share Ltd. Shijiazhuang branch Pledgor: Hebei Dongfang Ruifeng automobile safety component Co.,Ltd. Registration number: Y2023980041599 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |