CN101121396B - Electric ignition pipe for gas generator and its ignition method - Google Patents
Electric ignition pipe for gas generator and its ignition method Download PDFInfo
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- CN101121396B CN101121396B CN200610062058A CN200610062058A CN101121396B CN 101121396 B CN101121396 B CN 101121396B CN 200610062058 A CN200610062058 A CN 200610062058A CN 200610062058 A CN200610062058 A CN 200610062058A CN 101121396 B CN101121396 B CN 101121396B
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- gas generator
- ignition
- medicament
- housing
- electric
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Abstract
The invention discloses an electric ignition pipe of a gas generator and an ignition way of the electric ignition pipe. An ignition powder in the electric ignition pipe is an electric powder in whichan electric substance is mixed. The replacement of an ignition charge by the electric powder cancels a traditional bridging fibril or a bridging belt between two electrodes and does not need a complexbridging fibril welding technics in addition to improving the resistance between the two electrodes and reducing the ratio of the wrong burst of ignition for an air bag, besides the security of the maintenance and servicing is increased. The control of the ignition sensitivity can be realized by changing the distance of the electrodes and the proportion of the electric substance in the electric powder and adjusting the resistance between the electrodes.
Description
[technical field]
The present invention relates to the gas generator ignition device of a kind of vehicle airbag or safety belt pretensioner.
[background technology]
At present, the gas generator of widely used vehicle airbag or safety belt pretensioner on the market, its effect is the aerogenesis apparatus that can produce a large amount of gases after switching on to it in moment.Use at present most often pyrotechnic gas generator, as shown in Figure 1, comprise upper casing 40, lower casing 41, igniter 42, squib 43, gas producing medicinal 44.Gas producing medicinal 44 is generally firework medicament for producing the chemical material of a large amount of gases after burning.Igniter 42, squib 43, gas producing medicinal 44 are sealed between upper casing 40, the lower casing 41, and squib 43 2 sides are igniter 42, are provided with flash hole 45 between igniter 42 and the gas producing medicinal 44.When squib was lighted a fire, the flame that igniter 42 burning backs produce was lighted gas producing medicinal 44 by flash hole 45.
At present, the ignition element of above-mentioned squib generally is bridge silk or bridge band, and bridge silk or bridge band heating power reach the burning point of medicament, and ignition tube is got angry.Please refer to structure shown in Figure 2, insulating base 431 and first core electrode 432, second core electrode 433 constitute electrode plug, and housing 434 is covered on the insulating base 431, and bridge silk or bridge strip resistance 435 connect first core electrode 432, second core electrode 433.Because bridge silk or bridge strip resistance 435 are generally 1～4 ohm, when 12 volts automobile power sources were added on this resistance, electric current was easy to just to have surpassed 400 milliamperes of the maximum safe currents of medicament, so that excited medicament to get angry to cause that mistake is quick-fried.And the bridge silk itself is exactly very thin resistor wire, in the fitting process of electric ignition device or in the vibration of travelling of automobile, fracture causes the inefficacy of whole safety air bag or safety belt pretensioner easily.Therefore, safety of existing gas generator electric ignition device and reliability all are difficult to be guaranteed, and manufacturing process is also relatively complicated.
[summary of the invention]
The objective of the invention is to overcome above weak point of the prior art, provide a kind of safety, reliability higher, and the simple gas generator of manufacturing process is with squib and ignition method thereof.
For achieving the above object, the present invention proposes a kind of gas generator squib, comprises electrode plug, housing, ignition powder, and described housing and described electrode plug join, and described ignition powder is filled in the described housing; Described ignition powder is the conduction medicament, wherein mixes and is mixed with conducting material; Described electrode plug comprises first core electrode, insulating base, and described first core electrode is fixed on the described insulating base, and is arranged in described housing inner chamber; Be full of described conduction medicament between the described housing and first core electrode; Described housing is a conductive shell, constitutes second core electrode.
Above-mentioned gas generator squib, described conducting material are powdery graphite.The mass ratio of the shared conduction medicament of described conducting material is 3-8%.
Described electrode plug comprises first core electrode, insulating base, and described first core electrode is fixed on the described insulating base, and is arranged in described housing inner chamber; Be full of described conduction medicament between the described housing and first core electrode; Described housing is a conductive shell, constitutes second core electrode.The mass ratio of the shared conduction medicament of described conducting material is preferably 4.5-5.5%.Distance between the described conductive shell and first core electrode is 2.2-2.8mm, is preferably 2.4-2.6mm.
Above-mentioned gas generator squib also comprises a upper cover plate, and the top of described housing is provided with opening, and described upper cover plate is covered on this opening.Described upper cover plate adopts soft insulation inert material.
Owing to adopted above scheme, brought following beneficial effect:
Because squib of the present invention replaces ignition charge with the conduction medicament, two traditional interelectrode bridge silk or bridge bands have been cancelled, do not need complicated weldering bridge silk technology, two interelectrode resistance have been improved, reduce the quick-fried probability of safety air bag igniting mistake, and increased the safety in maintenance and servicing operations; And the distance that can be by changing electrode and the ratio of the shared conduction medicament of conducting material are adjusted the resistance between conductive electrode, are easy to realize the control to ignition sensitivity.
When squib of the present invention is applied to gas generator, because resistance is generally more than 30 ohm, 12 volts automobile power source is added on the squib of the present invention can not get angry, and has reduced the quick-fried probability of safety air bag igniting mistake, and has increased the safety in maintenance and servicing operations; In electric power loop, need only during application a simple increasing apparatus is installed, can reliable ignition.
Squib of the present invention does not need complicated weldering electric bridge, only the conduction medicament need be pressed between the electrode and get final product, in the fitting process of electric ignition device or in the vibration of travelling of automobile, fundamentally avoided the whole safety air bag or the safety belt pretensioner failure phenomenon that produce because of bridge silk fracture, therefore squib reliability of the present invention is very high, and production technology is also fairly simple.
[description of drawings]
Fig. 1 is the gas generator structural representation.
Fig. 2 is the squib structural representation of widely used bridge silk structure in the prior art.
Fig. 3 is the structural representation of the embodiment of the invention one gas generator with squib.
Fig. 4 is the structural representations of the embodiment of the invention two gas generators with squib.
Fig. 5 is the structural representations of the embodiment of the invention three gas generators with squib.
Fig. 6 is the left view of Fig. 5.
Fig. 7 is the local structure scheme drawings of the embodiment of the invention three gas generators with squib.
Fig. 8 is the structural representation of the left and right sides cover plate in the embodiment of the invention three.
[specific embodiment]
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Embodiment one
See also Fig. 3, squib of the present invention, comprise an electrode plug 11, electrode plug 11 is made up of with insulating base 111 first core electrode 112, second core electrode 113. also comprise housing 12, housing 12 is provided with opening, and housing 12 opening parts are provided with a upper cover plate 14, and coat pyroxyline lacquer in the sealing place surface of housing 12 openings and upper cover plate 14; Housing 12 is sheathed on the insulating base 111 of electrode plug 11, first core electrode 112, second core electrode 113 of electrode plug 11 are placed housing 12 inner inner chambers, and sealing with shellac varnish in housing 12 contact position with electrode plug 11. upper cover plate 14 is soft insulation inert material, is preferably the phenol resin thin slice. housing 12 internal cavities closely have been pressed into conduction medicament 13; Conduction medicament 13 in common igniter uniformly doping hybrid conductive material make. the distance by controlling first core electrode 112, second core electrode 113 and the ratio of the shared conduction medicament 13 of conducting material, just can adjust the resistance between core electrode. the preferred powdery graphite of conducting material, the ratio of the shared conduction medicament 13 of conducting material is 3-8%, is preferably 4.5-5.5%; First core electrode 112 of electrode plug 11, distance between second core electrode 113 is 1.6-2.4mm, be preferably 1.8-2.2mm. then the resistance value between its final two core electrodes be 28-34 ohm. first core electrode 112, after 113 energisings of second core electrode, when between two core electrodes, discharging, produce spark during disruptive conduction medicament 13, the medicament 13 that will conduct electricity is lighted, producing high temperature and high pressure gas during conduction medicament 13 violent burnings washes upper cover plate 14 open from the opening part of housing 12, flare spreads out of from the opening part of housing 12 other medicaments that are placed on around the squib is lighted then, makes the gas generator effect.
Embodiment two
See also Fig. 4, squib of the present invention comprises electrode plug 21, and electrode plug 21 is by first core electrode 212 and insulating base 211; Also comprise housing 22, housing 22 is provided with opening, and the shell nozzle place is provided with upper cover plate 24, and coats pyroxyline lacquer in the sealing place surface of housing 22 openings and upper cover plate 24; Housing 22 is sheathed on the insulating base 211 of electrode plug 21, and seals with shellac varnish in the contact position of housing 22 with electrode plug 21.Upper cover plate 24 is soft insulation inert material, is preferably the phenol resin thin slice.Closely be pressed into conduction medicament 23 at housing 22 internal cavities; Conduction medicament 23 is made for uniform doping hybrid conductive material in common igniter; The preferred powdery graphite of conducting material.The ratio of the shared conduction medicament of conducting material is 3-8%, is preferably 4.5-5.5%.Housing 2 is a conductive material, preferably copper mass shell body.At this moment, copper housing 22 plays the effect that is equivalent to second core electrode; Distance between the copper housing 22 and first core electrode 212 is 2.2-2.8mm, is preferably 2.4-2.6mm, and then the resistance value between its final two core electrodes is 38-42 ohm.During energising, when between core electrode 212 and copper housing 22, discharging, produce spark during disruptive conduction medicament 23, the medicament 23 that will conduct electricity is lighted, producing high temperature and high pressure gas during conduction medicament 23 violent burnings washes upper cover plate 24 open from the opening part of housing 22, flare spreads out of from the opening part of housing 22 other medicaments that are placed on around the squib is lighted then, makes the gas generator effect.
Embodiment three
Please in conjunction with Fig. 5, Fig. 6, shown in Figure 7, squib of the present invention comprises an electrode plug, and electrode plug is made up of with insulating base 311 first core electrode 312, second core electrode 313; Also comprise housing 32 and cover plate, this housing 32 is an insulating sleeve, and the insulating sleeve dual-side is provided with kick, and cover plate comprises 36 two of left cover plate 35, right cover plates, as shown in Figure 8, all have darker M shape groove 351 on it, and the cover plate two ends all is provided with hook portion; The hook portion of cover plate matches with the kick of insulating sleeve to seal and is located at the insulating sleeve both sides, and coats the pyroxyline lacquer sealing in sealing part.Left side cover plate 35, right cover plate 36 are conductive material, are preferably copper cover plate.And the hook portion of two cover plate one ends is connected with first core electrode 312, second core electrode 313 of electrode plug respectively, and further reinforces contact by scolding tin, and this moment, two cover plates linked to each other with two electrodes, and its effect is equivalent to two core electrodes.In addition, in two cover plates and the formed sealed cavity of insulating sleeve, closely be pressed into conduction medicament 33.Conduction medicament 33 is made for uniform doping hybrid conductive material in common igniter; The preferred powdery graphite of conducting material.The ratio of the shared conduction medicament of conducting material is 3-8%, is preferably 6-7%.Distance between two cover plates is 1.5-2.5mm, is preferably 1.9-2.1mm, and then the resistance value between its final two core electrodes is 25-30 ohm.During energising, two core electrodes conduct electricity respectively to copper cover plate, discharge between the two copper cover plates, produce spark during the disruptive conduction medicament, the medicament that will conduct electricity is lighted, the conduction medicament produces high temperature and high pressure gas when acutely burning the rice font groove on the cover plate is outwards broken through, and the break through after-opening of flare from the cover plate spreads out of and light being placed on squib other medicaments on every side then, makes the gas generator effect.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not think that concrete enforcement of the present invention is confined to these explanations; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; the some simple deduction or replace of being done all should be considered as belonging to the definite scope of patent protection of claims that the present invention submits to.
Claims (8)
1. a gas generator squib comprises electrode plug, housing, ignition powder, and described housing and described electrode plug join, and described ignition powder is filled in the described housing; Described ignition powder is the conduction medicament, wherein mixes and is mixed with conducting material; It is characterized in that: described electrode plug comprises first core electrode, insulating base, and described first core electrode is fixed on the described insulating base, and is arranged in described housing inner chamber; Be full of described conduction medicament between the described housing and first core electrode; Described housing is a conductive shell, constitutes second core electrode.
2. gas generator squib as claimed in claim 1 is characterized in that: described conducting material is a powdery graphite.
3. gas generator squib as claimed in claim 2 is characterized in that: the mass ratio of the shared conduction medicament of described conducting material is 3-8%.
4. gas generator squib as claimed in claim 3 is characterized in that: the mass ratio of the shared conduction medicament of described conducting material is preferably 4.5-5.5%.
5. gas generator squib as claimed in claim 1 is characterized in that: also comprise a upper cover plate, the top of described housing is provided with opening, and described upper cover plate is covered on this opening.
6. gas generator squib as claimed in claim 1 is characterized in that: the distance between the described conductive shell and first core electrode is 2.2-2.8mm.
7. gas generator squib as claimed in claim 5 is characterized in that: the distance between the described conductive shell and first core electrode is preferably 2.4-2.6mm.
8. gas generator squib as claimed in claim 5 is characterized in that: described upper cover plate adopts soft insulation inert material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610062058A CN101121396B (en) | 2006-08-09 | 2006-08-09 | Electric ignition pipe for gas generator and its ignition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610062058A CN101121396B (en) | 2006-08-09 | 2006-08-09 | Electric ignition pipe for gas generator and its ignition method |
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| Publication Number | Publication Date |
|---|---|
| CN101121396A CN101121396A (en) | 2008-02-13 |
| CN101121396B true CN101121396B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610062058A Active CN101121396B (en) | 2006-08-09 | 2006-08-09 | Electric ignition pipe for gas generator and its ignition method |
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| Country | Link |
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| CN (1) | CN101121396B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110772729A (en) * | 2019-12-04 | 2020-02-11 | 湖南神斧集团向红机械化工有限责任公司 | Automatic fire-fighting equipment power consumption starting drive |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5027707A (en) * | 1989-05-08 | 1991-07-02 | Olin Corporation | Electric primer with reduced RF and ESD hazard |
| DE10106366C1 (en) * | 2001-02-12 | 2002-09-12 | Trw Airbag Sys Gmbh & Co Kg | Pyrotechnic ignition system for gas generator has casing which contains charge and conductors for igniting it and has heat-transmitting section connecting it to gas generator which is made from plastic with high thermal conductivity |
| CN1509240A (en) * | 2001-05-15 | 2004-06-30 | 日本化药株式会社 | Gas generator |
| CN2654451Y (en) * | 2003-11-13 | 2004-11-10 | 西安北方庆华电器（集团）有限责任公司 | Safety belt pretightener gas generator |
| CN2654449Y (en) * | 2003-11-13 | 2004-11-10 | 西安北方庆华电器（集团）有限责任公司 | Electric igniting pipe for safety gas bag gas generator |
| CN2719659Y (en) * | 2004-08-12 | 2005-08-24 | 上海比亚迪有限公司 | Safety air bag electric igniting tube |
-
2006
- 2006-08-09 CN CN200610062058A patent/CN101121396B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5027707A (en) * | 1989-05-08 | 1991-07-02 | Olin Corporation | Electric primer with reduced RF and ESD hazard |
| DE10106366C1 (en) * | 2001-02-12 | 2002-09-12 | Trw Airbag Sys Gmbh & Co Kg | Pyrotechnic ignition system for gas generator has casing which contains charge and conductors for igniting it and has heat-transmitting section connecting it to gas generator which is made from plastic with high thermal conductivity |
| CN1509240A (en) * | 2001-05-15 | 2004-06-30 | 日本化药株式会社 | Gas generator |
| CN2654451Y (en) * | 2003-11-13 | 2004-11-10 | 西安北方庆华电器（集团）有限责任公司 | Safety belt pretightener gas generator |
| CN2654449Y (en) * | 2003-11-13 | 2004-11-10 | 西安北方庆华电器（集团）有限责任公司 | Electric igniting pipe for safety gas bag gas generator |
| CN2719659Y (en) * | 2004-08-12 | 2005-08-24 | 上海比亚迪有限公司 | Safety air bag electric igniting tube |
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| Publication number | Publication date |
|---|---|
| CN101121396A (en) | 2008-02-13 |
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