CN1116595A

CN1116595A - Air bag protecting arrangement for vehicle

Info

Publication number: CN1116595A
Application number: CN95114857A
Authority: CN
Inventors: 范良藻; 范思琼
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-13
Filing date: 1995-04-13
Publication date: 1996-02-14

Abstract

An oblate ellipsoial high-pressure air container designed specially is installed in steering wheel of car. When the air outlet of the container is opened by detonator explosion, the high-pressure air in it is filled into air bag to protect driver and passenger. Said detonator is triggered by a piezoelectric sensor when it is impacted by an inertial body of impact sensor. Said air is a cold air without environmental pollution.

Description

Air bag protecting arrangement for vehicle

The present invention relates to a kind of for motor vehicle air bag protecting arrangement, the air bag protecting arrangement that the air bag protecting arrangement of using on the automobile of more specifically saying so, particularly chaufeur used.

In recent years the development of communications and transportation promotes the increase of highway, especially express highway since, and vehicle increases and speed increases, so the collision case of vehicle also can increase.Prevent that personnel's injures and deaths are earth shaking problems in the accident.Because speed can not solve injures and deaths problem in the high-speed crash from, general safety strap.Occurred air bag protecting arrangement since the eighties, promptly in time inflated after the collision, between human body and other objects of Che Nei, formed buffering with airbag to an airbag.Be to activate to open gas source by a crash sensor to inflate in the prior art to airbag.What gas source had produces with the gunpowder detonation, as Chinese utility model patent 92229131.4 (CN2138594Y, referring to accompanying drawing 1), the gas that this device produces is followed a large amount of heat energy, might hinder into and damage device, and also having the problem of objectionable constituent in gunpowder residue and the gas, these priming systems are used for civil car, lose easily by the utilization of crime one's share of expenses for a joint undertaking to form social concern.Gas source also can be used high-pressure gas bottle; as Chinese utility model patent 92223860.1 (CN2138593Y; referring to accompanying drawing 2); a kind of fully mechanical air bag protecting device is wherein disclosed; but be communicated with tracheae between the gas cylinder of this device and the air bag; so the capacity of gas big inadequately (tens liters) particularly has action that the pipeline damping makes device fast (100 milliseconds) inadequately.Crash sensor of the prior art can be divided into two kinds of mechanical pick-up device and electric transducers again.CN2138594Y moves with coasting body and opens the spring of pretension, and having an effect with spring drives the igniting of striker bump detonating cap.This sensor can only be set together with gas source, and for example on automotive steering wheel, this is not the position the most responsive to collision.Electric transducer such as Chinese utility model patent 92229132.2 (CN2138595Y is referring to accompanying drawing 3), the negative acceleration that will produce in the time of will colliding with the piezoelectric effect device is converted to voltage signal, to open electronic switch an energy-storage capacitor is discharged by igniter head.CN2138593Y also mentions the method for opening an electromagnetic valve with pressure sensor when colliding, and this sensor all is with active circuit, can not work during power fail.What electric transducer was surveyed is acceleration/accel or power, thus because of the transient process of collision complicated inaccurate.Also have, sensor of the prior art all has the energy (mechanical energy of spring and the electric energy of the cond) standby of a pre-storage to discharge, so increased the possibility of misoperation.

Purpose of the present invention is exactly the shortcoming that overcomes above-mentioned prior art, and a kind of simple structure, nuisanceless, the fast air bag protecting arrangement for vehicle of action are provided.Another object of the present invention provides a kind of sensitivity and air bag protecting arrangement accurately and reliably, particularly is chaufeur design-calculated air bag protecting arrangement on automobile.

First task of the present invention realizes with technical solution described as follows: air bag protecting arrangement is made up of collision detector, gas source and bag module, wherein gas source is the high-pressure gas container of an oblate ellipsoid shape, its inner section ovalize, its neck is by a foil seal; Signal with collision detector output is lighted a detonator, in order to the thin slice of explosion high-pressure gas container neck.Because discharge gas,, and use compressed nitrogen not have public hazards so gas has chilling effect when expanding with the high pressure gas container.Can make gas source be arranged on airbag mouth position again,,, inflate more fasterly, can reach the 30-50 millisecond than CN2138593Y so there is not the pipeline damping as CN2138594Y.Gas container adopts elliposoidal that the capacity of gas is increased, and can also be arranged in the chaufeur bearing circle in front.Detonator is arranged on the thin slice of gas container neck, and detonator is preferably used the electric detonation detonator, and this just can be connected with electric transducer, and just collision detector is arranged on optimal position.

Another task of the present invention is to realize with following technical solution: air bag protecting arrangement is made up of collision detector, gas source and bag module, and wherein collision detector is to be made of impulse sensor and piezoelectric element; Impulse sensor is with an increment along the detection of the coasting body in the trajectory of car sense of motion setting momentum, when the momentum increment surpasses certain value, coasting body breaks away from its constraint mechanism and the piezoelectric element that is provided with along the relative motion of trajectory pipe inner trajectory and the bump trajectory pipe other end, the signal of piezoelectric element output is lighted a detonator, in order to ignite gas source.Because collision detector is exported the electric signal method with piezoelectric element, so collision detector can separate with airbag, impulse sensor can be arranged on the vehicle body for the most responsive position of momentum, the just the most suitable sites measured of momentum.Have only lead or cable connection between collision detector and the gas source.Can make coasting body with ferromagnetic material in order to work more reliably, and with the constraint mechanism of magnet as coasting body.Can also be with passive piezoelectric ceramics sensor, the high voltage signal of its output is lighted an electric detonation detonator by an arcing gap.This has just realized the energy freeization of collision detector part.Coasting body has only an in-to-in freedom of motion, and has only coasting body to obtain enough kinetic energy in high-speed motion just may to clash into piezoelectric element and produce electric signal, and this has just eliminated the possibility of misoperation.

Below in conjunction with drawings and Examples the present invention is done detailed explanation.

Fig. 1 is an air bag protecting arrangement scheme drawing of using gunpowder nitrogen gas generator and mechanical pick-up device in the prior art.

Fig. 2 is with the gas generator for air bag scheme drawing of high-pressure nitrogen bottle and mechanical pick-up device in the prior art.

Fig. 3 is an air bag protecting arrangement scheme drawing of using gunpowder nitrogen gas generator and electric transducer in the existing technology.

Fig. 4 is the scheme drawing of air bag protecting arrangement for vehicle of the present invention, and a part is high-pressure gas container and airbag, and another part is impulse sensor and piezoelectric element, uses cable connection between two parts.

Fig. 5 is the structural representation of embodiments of the invention mesohigh gas container and bag module.

Fig. 6 is the impulse sensor in the embodiments of the invention and the structural representation of piezoelectric element.

High-pressure gas container, detonator and bag module can be concentrated compactly and be arranged on the automobile steering wheel as can be seen from Figure 4.Improvement of the present invention is to adopt impulse sensor rather than directly uses pressure sensor, and piezoelectric element is as secondary output electric signal, and this just makes the present invention can be more accurately by momentum, and promptly the size of momentum increment size is judged the order of severity of collision.Also have, do not have power supply in the collision detector of the present invention, more do not have the energy of pre-storage, so eliminated the possibility of misoperation.

Airbag 1 represented among Fig. 5 is open, and airbag 1 is to fold up to be arranged at (among the figure) below the high-pressure gas container 2 when usual.The neck end of high-pressure gas container 2 is exactly a leak free thin slice 3.Be right after thin slice 3 above be electric detonation detonator 4, electric detonation detonator 4 is fixed on the neck of tripping gas container 2 by support 5.Be contact pilotage 6 above the electric detonation detonator 4, contact pilotage 6 outsides have insulator 7 to make electrical isolation between contact pilotage and the electric detonation detonator 4, so that add electric energizing signal.Insulator 7 and venting cover 8 flush fits, there are a plurality of holes 9 side of venting cover 8.There is filter layer 10 inboard in hole 9, enters airbag 1 in order to stop solid granulates by hole 9.There is a bevelled lid 11 outside of venting cover 8, the round mouth and the sealings such as airbag 1 usefulness bolt and packing ring of

lid

11, and 9 gases that shoot out are through covering the direct directive airbag 1 of conical reflecting in 11 from the hole.The volume of high-pressure gas container 2 can be the 100-200 milliliter, and it is withstand voltage can not to be lower than 200 barometric pressures.This just makes the capacity of gas can satisfy 60 liters requirement.

Represented among Fig. 6 is impulse sensor 12 and piezoceramic transducer 13, impulse sensor 12 constitutes by trajectory pipe 14 and middle coasting body 15 and as the magnet 16 of constraint mechanism, the other end of trajectory pipe 14 is piezoelectric ceramics sensors 13, and its place ahead has a pad 17 to be used to transmit impulsive force.There is an arcing gap 18 at the rear of sensor 13, and when voltage surpassed certain value, for example 400 volts, signal just can be by cable junction 19 outputs of arcing gap 18 and its other end.So just can screen momentum and whether reach predetermined scope with the threshold voltage of arcing.Trajectory pipe 14 operated by rotary motion optimal position in car is because automobile different parts when collision has different deformation, so the momentum difference of experiencing will be allowed a choice during design.The direction of trajectory pipe 14 should be parallel with the sense of motion of car.The effect of constraint mechanism 16 is that to pin coasting body 15 when general brake motionless.Can obtain high output voltage with piezoceramic transducer 13, be enough to ignite electric detonation detonator 4.The quality of coasting body 15 can be chosen between the 7-200 gram, and its stroke in trajectory pipe 14 is 0.2-4 centimetre.The shape of coasting body 14 is spheroidal in this embodiment.

Select the air bag protecting arrangement of high-pressure gas container formula of the present invention, the capacity of gas can reach more than 60 liters, can finish whole gas replenishment processs in the 30-50 millisecond.It is non-harmful using compressed nitrogen, and the gas of airbag is cold, can not hurt sb.'s feelings.What survey with the sensor of dynamo-electric combination of the present invention on the other hand is the momentum that produces in the collision, can judge whether serious collision case exactly, does not have power supply in the detector, does not also have other energy, has improved the reliability of air bag protecting arrangement.The used structure of this improvement is all very simple, and compactness and parts are few, the moderate product so reliable operation can be provided.

Though above embodiment and explanation all are to illustrate with the air bag protecting arrangement on the vehicle steering, patent of the present invention is not limited to the air bag protecting arrangement that automobile driver is used, and also can use aspect the chaufeur of hot-short and occupant's the protection.A those skilled in the art so long as utilized the design of patent of the present invention, will be understood that it is within the protection domain of patent of the present invention in the scheme of having read the various distortion that can design by drawing inferences about other cases from one instance behind the specification sheets.

Claims

1. an air bag protecting arrangement for vehicle is made up of collision detector, gas source and bag module, it is characterized in that:

A. said gas source is an oblate ellipsoid shape high-pressure gas container, its inner section ovalize, and its neck is by a foil seal;

B. light a detonator with the signal of said collision detector output, with the said thin slice of explosion.

2. by the described air bag protecting arrangement of claim 1, the volume that it is characterized in that said high-pressure gas container is that the 100-200 person of outstanding talent rises withstand voltage 200 barometric pressures that are not less than.

3. by claim 1,2 described air bag protecting arrangements, it is characterized in that said detonator is the electric detonation detonator.

4. by the described air bag protecting arrangement of claim 3, it is characterized in that said high-pressure gas container and bag module are arranged in the automobile steering wheel.

5. an air bag protecting arrangement for vehicle is made up of collision detector, gas source and bag module, it is characterized in that:

A. said collision detector is to be made of impulse sensor and piezoelectric element;

B. said impulse sensor is an increment of surveying momentum with the coasting body in the trajectory pipe that is provided with along the car sense of motion, and coasting body breaks away from its constraint mechanism and the said piezoelectric element that is provided with along the relative motion of trajectory pipe inner trajectory and the bump trajectory pipe other end when the momentum increment surpasses certain value;

C. light a detonator with the signal of said piezoelectric element output, in order to ignite said gas source.

6. by the described air bag protecting arrangement of claim 5, the quality that it is characterized in that said coasting body is the 7-200 gram, stroke 0.2-4 centimetre.

7. by claim 5,6 described air bag protecting arrangements, it is characterized in that said coasting body constraint mechanism is a magnet, said for this reason coasting body is made of ferromagnetic material.

8. by claim 5,6 described air bag protecting arrangements, it is characterized in that said piezoelectric element is passive piezoelectric ceramics sensor, the high voltage signal of its output is lighted said detonator by an arcing gap, and said detonator is the electric detonation detonator.

9. by the described air bag protecting arrangement of claim 5, it is characterized in that:

B. light a detonator with the signal of said collision detector output, in order to the said thin slice of explosion.

10. by the said air bag protecting arrangement of claim 9, the quality that it is characterized in that said coasting body is the 7-200 gram, stroke 0.2-4 centimetre.

11. by claim 9,10 described air bag protecting arrangements, it is characterized in that said inertial confinement mechanism is a magnet, said for this reason coasting body is made of ferromagnetic material.

12. by claim 9,10 described air bag protecting arrangements, it is characterized in that said piezoelectric element is passive piezoceramic transducer, the high voltage signal of its defeated ratio is lighted said detonator by an arcing gap, said detonator is the electric detonation detonator.

13., it is characterized in that said high-pressure gas container and bag module are arranged in the automobile steering wheel by claim 9,10 described air bag protecting arrangements.