CN2570117Y

CN2570117Y - Electric ignition type fast gas generating booster

Info

Publication number: CN2570117Y
Application number: CN 02266289
Authority: CN
Inventors: 傅丹人
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-14
Filing date: 2002-08-14
Publication date: 2003-09-03
Anticipated expiration: 2012-08-14

Abstract

The utility model relates to an electric ignition type fast gas generating booster, which comprises a casing, a base, and an electric ignition device, wherein, the open end of the casing forms an outward 90DGR flanging, the casing is fixedly connected with the base through the plane of the flanging, and the circumference lateral face section of the part which is extended to the 1/3 point of the total length of the casing from the end surface of the closing end to the direction of the opening end form two tangent planes in the direction of 180 DGR; the electric ignition device comprises an isolating cap and an electric ignition head and is placed in the base, the isolating cap is inserted to the center of gas generating medicine and a socket positioning ring is placed in the base so to fix the electric ignition device; the electric ignition head is arranged at the central position of the isolating cap. The utility model has the advantages of small physical dimension and high output pressure, and has the advantages that the utility model obtains short working time, and simultaneously, obtains the maximum safety and reliability.

Description

Electric ignition formula fast gas generation thruster

Technical field

The utility model relates to a kind of generation of gas thruster, the electric ignition formula fast gas generation thruster that particularly a kind of car belt constrictor that is used for the vehicle occupant safety system is used.

Background technology

Conventional gas generation appts such as safety air bag gas generator, its volume and weight is all bigger, and required gaseous tension requires lower, and the whole mechanism time is longer relatively.The gas generator of many types is used, particularly in the field of automobile passenger system safety devices, and independent device of the formation that these dissimilar gas generators have.

The utility model content

It is small and exquisite that technical problem to be solved in the utility model provides a kind of oad, and special contour structures as the location is arranged, and utilizes the bump igniting type generation of gas thruster of the high pressure work done of gas generation.

The technical scheme that its technical matters that solves the utility model adopts.This electric ignition formula fast gas generation thruster, comprise housing, pedestal and electrical firing device, one end of its middle shell is open, other end sealing, the housing inner chamber forms the combustion chamber of gas generator, combustion chamber is used to load required gas generant composition in accordance, 1), the open end of housing forms an outside flange of 90 °, housing is fixedly connected by flange plane and pedestal, extend to the circumference side section of 1/3 distance part of housing total length from end face to the open end direction of closed end, directions with 180 degree form two tangent planes, and two tangent planes are the plane of the parallel symmetry that is used to locate; 2), described electrical firing device, comprise an isolating cap and electric igniter, electrical firing device is placed in the pedestal; The central authorities of gas generant composition in accordance have inserted isolating cap, and end sealing is embedded in the gas generant composition in accordance, and the other end is an opening, is used for being connected with electric ignition device, and a socket nest is positioned in the pedestal, is used for fixing electrical firing device; 3), settle electric igniter at the central part of isolating cap, two payment to a porter of electric igniter are fixed on the electrode plug, two payment to a porter are from axially passing two end faces of electrode plug, the other end at electrode plug exposes certain length formation contact pin, and contact pin is used for being connected with the socket of the Circuits System that power supply is provided.

The technical scheme that its technical matters that solves the utility model adopts can also be further perfect.The inner chamber of isolating cap adheres to plastic pipe around being close to inwall, and the external diameter of plastic pipe and the diameter of bore of isolating cap are complementary.The aluminium material of housing.The profile of electrode plug is a cylindric object that the two ends diameter is little, mid diameter is bigger; An end face of electrode plug is a plane, is used for fixing electric igniter; The cylindrical of another end face extends the wedge large knitting needle that has back-off of two 180 ° of symmetries, and the wedge rod is used for being connected with contact pin bonded assembly socket nest, and two square openings that carry out snap action with the wedge rod are arranged on the nest wall of socket nest.

The effect that the utility model is useful is: 1), oad is small and exquisite, and special contour structures as the location is arranged, the high pressure work done that utilizes gas to produce, delivery pressure reaches about 100MPa, even higher.2), obtain very short work-hours, obtain maximum safety and reliability simultaneously, adopt isolating cap separately with ignition device and the powder charge that produces gas.Prevent in the operational process of automobile, waved and vibrate igniter head damage that causes and firing head and aerogenesis powder charge and produce friction, eliminate and cause the generation of accidental ignition or misfire and improve safety and reliability.

Description of drawings

Fig. 1 is that master of the present utility model looks cross-sectional view;

The specific embodiment

Below in conjunction with embodiment the utility model is further described.As shown in Figure 1, this electric ignition fast gas generation thruster comprises the similar cylindrical shell 1 of an aluminum; One end of housing 1 is open, other end sealing; The open end forms an outside flange of 90 °, and the flange plane is used for captiveing joint with pedestal 8; Extend to the circumference side section of 1/3 distance part of housing total length from end face to the open end direction of closed end, form two tangent planes with the directions of 180 degree, two tangent planes are the plane of parallel symmetry; Cylindrical shell becomes the housing of a special shape like this.The plane of two parallel symmetries is used for the positioning and fixing that electric ignition formula fast gas producer is installed in the vehicle occupant safety system.

Housing 1 inner chamber forms the combustion chamber 2 of gas generator; Combustion chamber 2 is used to load required gas generant composition in accordance 3; Gas generant composition in accordance 3 is to use the medicine grain that forms a kind of small rice grain size behind the adhesives mixing granulation, fills in the burning of housing in the mode that is similar to loose shape.

The central authorities of gas generant composition in accordance 3 have inserted isolating cap 4, isolating cap 4 is cylindrical shells of aluminum, and shape is like broad-mouthed receptacle for holding liquid shape, and an end seals, be embedded in the gas generant composition in accordance 3, the other end is an opening, is used for being connected with electric ignition device 9, and the inner chamber of isolating cap 4 adheres to a plastic pipe 10 around being close to inwall, plastic pipe 10 is a kind of high molecular polymers, about the endoporus height weak point 2mm of length than isolating cap 4, the diameter of bore of the external diameter of plastic pipe 10 and isolating cap 4 is complementary, and forms friction tight dimension chain.

Central part at plastic pipe 4 is settled electric igniter 5; Electric igniter 5 is the firer's elements that detonate with electric energy, and two payment to a porter 12 of electric igniter 5 are fixed on the electrode plug 6, guarantees certain distance between two payment to a porter 12, and two payment to a porter 12 continue from axially passing two end faces of electrode plug 6; Constitute contact pin 11 after the other end of electrode plug 6 exposes certain length, contact pin 11 is used for being connected with the socket of the Circuits System that power supply is provided; The outside face of two contact pins 11 is that special coating is handled the gold-plated or titanium of outside face.

Electrode plug 6 is the plastic products that high molecular polymer is made, and the profile of electrode plug 6 is the cylindric objects that the two ends diameter is little, mid diameter is bigger; An end face of electrode plug 6 is planes, is fixing electric igniter 5; The cylindrical of another end face extends the wedge large knitting needle that has back-off of two 180 ° of symmetries, and the wedge rod is used for being connected with contact pin 11 bonded assembly socket nests 7, and back-off plays the effect of snap close.Socket nest 7 is made of plastics, and two square openings that carry out snap action with the wedge rod are arranged on socket nest 7 walls, and a size of external diameter and pedestal 8 one ends is complementary.

During installation: electric igniter 5, isolating cap 4 are formed electrical firing device 9 together.Electrical firing device 9 also must be packed in the aluminum base 8.The profile of pedestal 8 is as a cylinder that step is arranged, superposition is together mutually especially as at the bottom of big broad-mouthed receptacle for holding liquid system and a less broad-mouthed receptacle for holding liquid system and two broad-mouthed receptacles for holding liquid for this cylinder, there is a circular hole at center at the bottom of the broad-mouthed receptacle for holding liquid, the diameter of circular hole is identical with the diameter of an end face of electrode plug, and the internal diameter of large-size broad-mouthed receptacle for holding liquid system just in time can be packed electrode plug 6 upperlimits into partly; The diameter of pedestal 8 center holes and electrode plug 6 band wedge rods one end is complementary; The internal diameter of less broad-mouthed receptacle for holding liquid system and the external diameter of nest are complementary.When socket nest 7 pedestal 8 of packing into, when packing electrical firing device 9 into pedestal 8 again, the back-off of wedge rod should enter in the square hole of socket nest 7, and assembling just often should be able to be heard slight " click is rattled away " sound.These parts that assemble are refilled be assigned in the housing, inwardly turn over the straight flange of special tool, and compacting closely the big broad-mouthed receptacle for holding liquid system of pedestal.

The placement isolating cap has been eliminated the contact between gas generant composition in accordance and the firing head, and work-hours does not prolong, t _RBe no more than 0.3～0.4ms.Isolating cap adopts suitable material and coating in addition except that enough intensity is arranged, play the effect that electrostatic prevention, radio frequency etc. improve the safetys of electric firing element.

With the gas generant composition in accordance that higher output gas pressure and energy are arranged is to finish the key of thrust gas device function.Gas generant composition in accordance is used the medicine with the sodium nitride basis, and it is necessary adding certain quantity of additive, and the pressure that improves output is up to about 100MPa; And for the momentary action energy output, the process in-service time is less than 8ms, and the use of gas generant composition in accordance must be more careful; As when containing the pyrotechnic compound compound of metal powder such as zirconium, titanium and oxidizer (nonnitrogenousization sodium), momentary action is just easy many.The generation of gas thruster does not directly act on occupant's the body, thereby the temperature requirement of gas generant composition in accordance then seemed is not so important, and the composition of cooling and heat absorption can not add even less and adds.

The loadings of gas generant composition in accordance and volume are under the suitable situation of processed condition, and the range of control of amount is wider, and charge volume is slightly less than the volume of combustion chamber, so that the firing mechanism of packing into that can safety.Very important that its leak tightness shows behind the firing mechanism of packing into, except that with the comparatively special technology, it is good ways that some sealants are used in the junction, helps like this that opposing is moist, salt fog and influence of temperature variation.

The conformability and the rapidity of gas generant composition in accordance lighted in assurance, is necessary with a kind of not too sensitivity and the strong transitional medicine of ignition ability.This transitional medicine is based on the igniter of nitrocellulose and the compound of gas generant composition in accordance, and ratio is that the content of gas generant composition in accordance is no more than 50%.Must make special processed to isolating cap, the simplest method is to reduce the thickness of isolating cap closed end, generally is not more than 0.20mm, and the another kind of way that reduces intensity is to improve the intensity of side periphery, and the base plane of cap is done some grooves.And this way also is used to the bottom of combustion chamber.The sum of errors conformability that reduces in-service time helps finishing of output function.The length that it should be noted that groove can not be greater than 2/3 of disk diameter.

Claims

1, a kind of electric ignition formula fast gas generation thruster, comprise housing (1), pedestal (8) and electrical firing device (9), one end of its middle shell (1) is open, other end sealing, housing (1) inner chamber forms the combustion chamber (2) of gas generator, combustion chamber (2) is used to load required gas generant composition in accordance (3), it is characterized in that:

1), the open end of housing (1) forms an outside flange of 90 °, housing (1) is fixedly connected by flange plane and pedestal (8), extend to the circumference side section of 1/3 distance part of housing (1) total length from end face to the open end direction of closed end, directions with 180 degree form two tangent planes, and two tangent planes are the plane of the parallel symmetry that is used to locate;

2), described electrical firing device (9), comprise an isolating cap (4) and electric igniter (5), electrical firing device (9) is placed in the pedestal (8); The central authorities of gas generant composition in accordance (3) have inserted isolating cap (4), and end sealing is embedded in the gas generant composition in accordance, and the other end is an opening, is used for being connected (9) with electric ignition device, and a socket nest (7) is positioned in the pedestal, is used for fixing electrical firing device (9);

3), settle electric igniter (5) at the central part of isolating cap (4), two payment to a porter (12) of electric igniter (5) are fixed on the electrode plug (6), two payment to a porter (12) are from axially passing two end faces of electrode plug (6), the other end at electrode plug (6) exposes certain length formation contact pin (11), and contact pin (11) is used for being connected with the socket of the Circuits System that power supply is provided.

2, electric ignition formula fast gas generation thruster according to claim 1 is characterized in that: the inner chamber of isolating cap (4) adheres to a plastic pipe (10) around being close to inwall, and the diameter of bore of the external diameter of plastic pipe (10) and isolating cap (4) is complementary.

3, electric ignition formula fast gas generation thruster according to claim 1 is characterized in that: the aluminium material of housing (1).

4, electric ignition formula fast gas generation thruster according to claim 1, it is characterized in that: the profile of electrode plug (6) is a cylindric object that the two ends diameter is little, mid diameter is bigger; An end face of electrode plug (6) is a plane, is used for fixing electric igniter (6); The cylindrical of another end face extends the wedge large knitting needle that has back-off of two 180 ° of symmetries, the wedge rod is used for being connected with contact pin (11) bonded assembly socket nest (7), and two square openings that carry out snap action with the wedge rod are arranged on the nest wall of socket nest (7).