CN111186409B - Gas generator of safety air bag - Google Patents
Gas generator of safety air bag Download PDFInfo
- Publication number
- CN111186409B CN111186409B CN201910832758.4A CN201910832758A CN111186409B CN 111186409 B CN111186409 B CN 111186409B CN 201910832758 A CN201910832758 A CN 201910832758A CN 111186409 B CN111186409 B CN 111186409B
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- China
- Prior art keywords
- medicine cup
- ignition
- cup
- plate
- fixedly connected
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R2021/26029—Ignitors
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
The invention discloses a gas generator of an air bag, relating to the technical field of automobile air bags; the ignition device comprises a main body, a medicine cup and a filter screen which are positioned in the main body, transfer powder which is positioned in the medicine cup, gas-producing powder which is filled between the main body and the medicine cup, and an ignition tube which is used for igniting the transfer powder, wherein the main body comprises an upper cover and a lower cover, an ignition hole is arranged on the medicine cup, a flange is arranged on the edge of the lower cover, one part of the lower cover protrudes towards the inside of the main body to form an installation platform and a groove which is positioned below the installation platform, the cup mouth of the medicine cup is fixedly connected on the installation platform, a via hole is formed in the installation platform, the ignition tube comprises an ignition end and an electrode which are positioned in the medicine cup, one end of the electrode, which is far away from the ignition end, penetrates through the via hole and then is positioned in the groove, an injection molding body which is used for preventing gas in the main body from leaking from the via hole is fixedly connected to the corresponding position of the installation platform, and the ignition tube is fixedly connected to the injection molding body. The invention avoids short circuit caused by residual metal fragments piercing the ignition tube.
Description
Technical Field
The invention belongs to the technical field of automobile safety airbags, and particularly relates to a gas generator of a safety airbag.
Background
The traditional safety airbag gas generator is complex in structure, a mounting table of the traditional safety airbag gas generator is fixedly connected to a lower cover through welding, metal fragments are easily remained on the mounting table, and the metal fragments easily cause the ignition tube to be punctured and short-circuited.
Disclosure of Invention
The invention aims to overcome the defect that an ignition tube in the prior art is easily punctured by residual metal fragments to cause short circuit, and provides an air generator of an air bag, which avoids the short circuit caused by the puncture of the ignition tube by the residual metal fragments.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an air bag gas generator, includes the main part, is located medicine cup and filter screen in the main part, is located the priming of medicine cup, fills the product gas medicine between filter screen and medicine cup, is used for lighting the ignition tube of priming, the main part includes upper cover and lower cover, be equipped with the ignition hole on the medicine cup, the lower cover edge is equipped with the flange, the lower cover is partly to the inside protruding recess that forms the mount table and be located the mount table below of main part, the rim of a cup rigid coupling of medicine cup is on the mount table, be equipped with the via hole on the mount table, the ignition tube is including the ignition end and the electrode that are located the medicine cup, the one end that the ignition end was kept away from to the electrode is located the recess after passing the via hole, the lower cover corresponds the position rigid coupling at the mount table and has the injection molding body that is used for preventing the gas in the main part from leaking from the via hole, the ignition tube rigid coupling is on the injection molding body. The mounting platform, the flange and the lower cover are formed by stamping through a steel plate, metal fragments cannot be generated, the phenomenon that the metal fragments pierce the ignition tube to cause short circuit is avoided, in addition, the number of parts of the gas generator is greatly reduced, and the production efficiency is improved.
Preferably, the upper part of the groove is in a circular truncated cone shape with the top surface area larger than the bottom surface area, the injection molding body is filled in the cup mouth part, the via hole and the groove of the medicine cup, a second groove is arranged on one side of the injection molding body, which is far away from the ignition end, and one end of the electrode, which is far away from the ignition end, is positioned in the second groove. The shape and the recess adaptation of injection molding body in the recess, recess upper portion are big-end-up's design, and when gas generator produced gas, be high pressure state in the medicine cup, the injection molding body can not drop.
Preferably, the top end of the medicine cup is fixedly connected with an annular filter screen cover, the filter screen is cylindrical, the top end of the filter screen is fixedly connected to the filter screen cover, the lower cover comprises a side plate and a bottom plate, and the bottom end of the filter screen is fixedly connected to the junction of the side plate and the bottom plate. The filter screen is connected firmly.
Preferably, a sliding plate is connected to one side of the ignition hole on the outer side of the medicine cup in a sliding mode, a second through hole is formed in the sliding plate, a temporary fixing block which is melted after being heated is fixedly connected to the sliding plate, the temporary fixing block is fixedly connected with the medicine cup, a spring which is used for moving the sliding plate to the ignition hole after the temporary fixing block is melted is arranged on the medicine cup, a sealing plate is arranged on one side, far away from the medicine cup, of the sliding plate, a sealing plate covers the second through hole, one end of the sealing plate is hinged to the sliding plate, and a coil spring is arranged at the hinged position of the sliding plate and the sealing plate. Produce the gaseous in-process of gas medicine production, produce a large amount of heats, the closing plate in time plugs up the ignition hole, prevents in gaseous entering medicine cup to reduce the decay of atmospheric pressure, makeed air bag expand fast and big.
Preferably, the sealing plate is provided with a sealing gasket on one side close to the sliding plate. The air tightness between the sealing plate and the medicine cup is improved.
Preferably, the medicine cup is fixedly connected with sliding rails at corresponding positions of the sliding plates, the sliding rails are located on two opposite sides of the sliding plates, the cross section of each sliding rail is L-shaped, the sliding rails and the outer side walls of the medicine cup form U-shaped sliding grooves, the edges of the sliding plates are located in the sliding grooves and are in sliding connection with the sliding grooves, the sealing plates are located between the sliding rails, and one sides, close to the sliding rails, of the sealing plates abut against the sliding rails. Simple structure, slide rail and medicine cup are integrated into one piece, prevent that gas from getting into the medicine cup from slide both sides.
Preferably, the outer side of the medicine cup is fixedly connected with a limiting bulge, and the limiting bulge is positioned on one side, away from the sliding plate, of the ignition hole. The limiting protrusion can enable the sliding plate to reach a designated position after sliding.
The invention has the beneficial effects that: the invention avoids short circuit caused by residual metal fragments piercing the ignition tube. Simple structure and slow air pressure attenuation.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged view of FIG. 1 at B;
FIG. 4 is a schematic view of FIG. 3 as gas is emitted;
FIG. 5 is a top view of the lower cover;
fig. 6 is a bottom view of the lower cover.
In the figure: the ignition device comprises an upper cover 1, a lower cover 2, a medicine cup 3, transfer powder 4, gas production medicine 5, a filter screen 6, an ignition tube 7, a flange 8, a mounting table 9, a through hole 10, an ignition end 11, an electrode 12, a groove 13, an injection molded body 14, a filter screen cover 15, a side plate 16, a bottom plate 17, a second groove 18, an ignition hole 19, a sliding plate 20, a second through hole 21, a spring 22, a temporary fixing block 23, a sealing plate 24, a coil spring 25, a sealing gasket 26, a sliding rail 27, a sliding groove 28, a limiting protrusion 29 and an air outlet 30.
Detailed Description
The invention is explained in further detail below with reference to the figures and the detailed description:
example (b):
fig. 1 to 6 show an airbag inflator, which comprises a main body, a cup 3 and a filter screen 6 in the main body, a transfer charge 4 in the cup 3, a gas generating charge 5 filled between the filter screen and the cup 3, and an igniter tube 7 for igniting the transfer charge 4, wherein the main body comprises an upper cover 1 and a lower cover 2, the cup 3 is provided with an ignition hole 19, the edge of the lower cover 2 is provided with a flange 8 integrally formed with the lower cover 2, a part of the lower cover 2 protrudes towards the inside of the main body to form a mounting platform 9 and a groove 13 positioned below the mounting platform 9, the upper part of the groove 13 is in a circular truncated cone shape with a top surface area larger than a bottom surface area, the cup mouth of the cup 3 is fixedly connected to the mounting platform 9, the mounting platform 9 is provided with a via hole 10, the igniter tube 7 comprises an ignition end 11 and an electrode 12 positioned in the cup 3, one end of the electrode 12 far away from the ignition end 11 passes through the via hole 10 and then is positioned in the groove 13, an injection molding body 14 for preventing gas in the main body from leaking from the via hole 10 is fixedly connected to the lower cover 2 at a position corresponding to the mounting table 9, and the ignition tube 7 is fixedly connected to the injection molding body 14; the injection molding body 14 is filled in the cup mouth part, the through hole 10 and the groove 13 of the medicine cup 3, a second groove 18 is formed in one side, away from the ignition end 11, of the injection molding body 14, and one end, away from the ignition end 11, of the electrode 12 is located in the second groove 18; the top end of the medicine cup 3 is fixedly connected with an annular filter screen cover 15, the filter screen 6 is cylindrical, the top end of the filter screen 6 is fixedly connected to the filter screen cover 15, the lower cover 2 comprises a side plate 16 and a bottom plate 17, and the bottom end of the filter screen 6 is fixedly connected to the junction of the side plate 16 and the bottom plate 17.
A sliding plate 20 is connected to one side of the ignition hole 19 on the outer side of the medicine cup 3 in a sliding manner, a sliding rail 27 is fixedly connected to the corresponding position of the sliding plate 20 on the medicine cup 3, the sliding rail 27 is located on two opposite sides of the sliding plate 20, the cross section of the sliding rail 27 is in an L shape, the sliding rail 27 and the outer side wall of the medicine cup 3 form a U-shaped sliding chute 28, the edge of the sliding plate 20 is located in the sliding chute 28 and is in sliding connection with the sliding chute 28, a second through hole 21 is formed in the sliding plate 20, a temporary fixing block 23 which is melted after being heated is fixedly connected to the sliding plate 20, the temporary fixing block 23 is fixedly connected to the medicine cup 3, a spring 22 which moves the sliding plate 20 to the ignition hole 19 after the temporary fixing block 23 is melted is arranged on the medicine cup 3, a sealing plate 24 is arranged on the second through hole 21 on one side of the sliding plate 20 away from the medicine cup 3 in a covering manner, and a sealing pad 26 is arranged on one side of the sealing plate 24 close to the sliding plate 20; the sealing plate 24 is positioned between the sliding rails 27, and one side of the sealing plate 24 close to the sliding rails 27 is abutted against the sliding rails 27; one end of the sealing plate 24 is hinged on the sliding plate 20, and a coil spring 25 is arranged at the hinged position of the sliding plate 20 and the sealing plate 24; the outer side of the medicine cup 3 is fixedly connected with a limiting bulge 29, and the limiting bulge 29 is positioned at one side of the ignition hole 19 far away from the sliding plate 20.
When the embodiment is used:
the upper cover 1 is provided with an air outlet 30, and aluminum foils are arranged on the air outlet 30 and the ignition hole 19; the temporary fixing block 23 is made of alloy with the melting point of about 70 ℃; the above are all the prior art.
In the embodiment, the electrode 12 is connected to an automobile through a flange 8, the electrode 12 is connected with an ECU of the automobile, after an accident occurs, the EUC sends a signal to an ignition tube 7, the ignition tube 7 ignites the transfer charge 4, the aluminum foil on an ignition hole 19 is broken to further enable the gas production charge 5 to react, the gas production charge 5 generates a large amount of gas and simultaneously emits a large amount of heat, a temporary fixing block 23 is melted, a spring 22 contracts, a sliding plate 20 slides along a sliding rail 27, the sliding plate 20 abuts against a limiting protrusion 29, the sliding plate 20 is located on the ignition hole 19 after sliding, the ignition hole 19 is communicated with a second through hole 21, the gas production charge 5 generates a large amount of gas, and the gas passes through a filter screen 6 and exits from a gas outlet 30, so that the safety airbag is expanded; because the gas producing medicine 5 generates a large amount of gas quickly, the medicine cup 3 forms a high-pressure area, the air pressure outside the medicine cup 3 is higher than the air pressure in the medicine cup 3, so that the sealing plate 24 is pressed on the sliding plate 20, and the sealing gasket 26 between the sealing plate 24 and the sliding plate 20 ensures that the air tightness is better; in the process of generating gas, the temperature in the medicine cup 3 will rise, and the gas pressure will also rise, if the gas pressure in the medicine cup 3 is higher than the gas pressure outside the medicine cup, the coil spring 25 applies a force to the sealing plate 24 towards the medicine cup 3, at this time, when the pressure of the gas in the medicine cup 3 on the sealing plate 24 is enough to resist the force of the coil spring 25, the sealing plate 24 leaves the medicine cup 3, the gas in the medicine cup 3 leaves the medicine cup 3, and when the gas pressure in the medicine cup 3 is reduced, the sealing plate 24 is pressed against the sliding plate 20 again.
After the atmospheric pressure outside medicine cup 3 rises, gaseous can expand the filter screen, because the juncture at curb plate 16 and bottom plate 17 is connected to the filter screen bottom, 3 one side of medicine cup are kept away from to 6 bottoms of filter screen and are leaned on curb plate 16, offset horizontally power, only bear vertical power, reduce the atress of 6 bottoms of filter screen.
The second groove 18 is arranged on one side of the injection molding body 14, the electrode 12 is positioned in the second groove 18, the volume of a product is reduced, and the upper part of the groove 13 is designed to be large at the top and small at the bottom so as to prevent the injection molding body 14 from being extruded under high pressure.
Claims (6)
1. A safety airbag gas generator comprises a main body, a medicine cup and a filter screen which are positioned in the main body, igniting powder which is positioned in the medicine cup, gas generating medicine which is filled between the main body and the medicine cup, and an igniting pipe which is used for igniting the igniting powder, wherein the main body comprises an upper cover and a lower cover, the medicine cup is provided with an igniting hole, the safety airbag gas generator is characterized in that the edge of the lower cover is provided with a flange, one part of the lower cover protrudes towards the inside of the main body to form an installation platform and a groove which is positioned below the installation platform, the cup mouth of the medicine cup is fixedly connected on the installation platform, the installation platform is provided with a via hole, the igniting pipe comprises an igniting end and an electrode which are positioned in the medicine cup, one end of the electrode, which is far away from the igniting end, penetrates through the via hole and then is positioned in the groove, the lower cover is fixedly connected with an injection molding body which is used for preventing the gas in the main body from leaking from the via hole at the corresponding position of the installation platform, and the igniting pipe is fixedly connected on the injection molding body, the utility model discloses a medicine cup, including medicine cup, heating plate, sealing plate, the medicine cup outside has the slide at one side sliding connection in ignition hole, be equipped with the second via hole on the slide, the rigid coupling has the fused interim solid joint piece after being heated on the slide, interim solid joint piece and medicine cup rigid coupling, be equipped with on the medicine cup and remove the slide to the spring on the ignition hole after the melting of interim solid joint piece, the slide is kept away from medicine cup one side and is covered at second via hole upper cover and be equipped with the closing plate, closing plate one end articulates on the slide, slide and closing plate articulated department are equipped with the wind spring.
2. The airbag inflator according to claim 1, wherein the upper portion of the groove is in a truncated cone shape with a top surface area larger than a bottom surface area, the injection molded body is filled in the cup mouth portion, the through hole and the groove of the medicine cup, a second groove is formed in one side of the injection molded body away from the ignition end, and one end of the electrode away from the ignition end is located in the second groove.
3. The airbag gas generator as claimed in claim 1, wherein the top end of the cup is fixedly connected with a ring-shaped filter cover, the filter screen is cylindrical, the top end of the filter screen is fixedly connected with the filter cover, the lower cover comprises a side plate and a bottom plate, and the bottom end of the filter screen is fixedly connected with the junction of the side plate and the bottom plate.
4. An air-bag inflator according to claim 1 wherein the seal plate is provided with a seal on a side thereof adjacent the slider plate.
5. The airbag gas generator as claimed in claim 1, wherein the medicine cup is fixedly connected with slide rails at corresponding positions of the slide rails, the slide rails are located at two opposite sides of the slide rails, the cross section of the slide rails is L-shaped, the slide rails and the outer side wall of the medicine cup form a U-shaped sliding chute, the edge of the slide rail is located in the sliding chute and is slidably connected with the sliding chute, the sealing plate is located between the slide rails, and one side of the sealing plate close to the slide rails abuts against the slide rails.
6. The airbag inflator as claimed in claim 1, wherein a limiting protrusion is fixedly connected to an outer side of the medicine cup, and the limiting protrusion is located on a side of the ignition hole away from the sliding plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910832758.4A CN111186409B (en) | 2019-09-04 | 2019-09-04 | Gas generator of safety air bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910832758.4A CN111186409B (en) | 2019-09-04 | 2019-09-04 | Gas generator of safety air bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111186409A CN111186409A (en) | 2020-05-22 |
| CN111186409B true CN111186409B (en) | 2022-04-26 |
Family
ID=70704581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910832758.4A Active CN111186409B (en) | 2019-09-04 | 2019-09-04 | Gas generator of safety air bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111186409B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114407824B (en) * | 2021-12-14 | 2022-12-02 | 均胜汽车安全系统（长兴）有限公司 | Gas generator with ignitions and explosion functions of igniters |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5516147A (en) * | 1994-10-12 | 1996-05-14 | Morton International, Inc. | Stamped metal toroidal hybrid gas generator with sliding piston |
| CN105283357A (en) * | 2013-03-29 | 2016-01-27 | 日本化药株式会社 | Gas generator |
| CN205010167U (en) * | 2015-09-15 | 2016-02-03 | 比亚迪股份有限公司 | Gas generator , air bag and have this air bag's car |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2963086B1 (en) * | 1997-12-26 | 1999-10-12 | ダイセル化学工業株式会社 | Gas generator and airbag device for airbag |
| TW469235B (en) * | 1999-10-04 | 2001-12-21 | Daicel Chem | Gas generator for air bag and air bag device |
-
2019
- 2019-09-04 CN CN201910832758.4A patent/CN111186409B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5516147A (en) * | 1994-10-12 | 1996-05-14 | Morton International, Inc. | Stamped metal toroidal hybrid gas generator with sliding piston |
| CN105283357A (en) * | 2013-03-29 | 2016-01-27 | 日本化药株式会社 | Gas generator |
| CN205010167U (en) * | 2015-09-15 | 2016-02-03 | 比亚迪股份有限公司 | Gas generator , air bag and have this air bag's car |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111186409A (en) | 2020-05-22 |
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