CN1899893A

CN1899893A - Inflator for car safety air bag

Info

Publication number: CN1899893A
Application number: CNA2005100851334A
Authority: CN
Inventors: 余明彰; 郭诗茹; 谢建良
Original assignee: QUANXING CHUANGXIN SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: QUANXING CHUANGXIN SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2005-07-20
Filing date: 2005-07-20
Publication date: 2007-01-24
Anticipated expiration: 2025-07-20
Also published as: CN100554045C

Abstract

The inflator for safety air bag in car includes one thin casing, one gas generator inside the casing, one air bag set on one side of the casing, and one elastic plate valve in the other side of the casing. The gas generator includes one extending pipe inside the casing, one baffle between the extending pipe and the elastic plate valve and one gas generating unit to one end of the extending pipe, and has one gas flow passage between the baffle and the extending pipe. In case of collision accident of automobile, the chemical substances inside the gas generating unit produce chemical reaction to release great amount of nitrogen and the nitrogen flows to the outlet while sucking air from outside so as to inflate the safety air bag with the mixed gas.

Description

Inflator for car safety air bag

Technical field

The present invention relates to a kind of vehicle body fittings, refer to a kind of safe automobile air bag especially.

Background technology

Automobile is in the high-speed travel process, when car body is subjected to colliding, being positioned at the steerman of front stall and passenger can dash forward because of inertia, strikes car body (comprising bearing circle, instrument carrier panel etc.) and injured, therefore, except will fastening one's safety belt, more and more automobiles are classified safety air bag as basic outfit, with air bag device on the instrument in bearing circle and passenger the place ahead, with when car body is subjected to colliding, safety air bag is able to inflation, reduces the chance that human body collides car body.And the inflation mode of present safety air bag, be in air bag, to fill chemical substance, during automobile was advanced, electronic inductor received information such as speed of a motor vehicle variation, vehicle vibrating state, brake form at any time, after micro computer processing comparison, once judgement is to clash into, produce current impulse immediately, light chemical substance in the air bag, cause a series of chemical change, and disengage a large amount of nitrogen, make air bag inflation in 20 to 30 milliseconds.

Though the equipment of safety air bag, really reduce the central death toll of collision accident, but being overall safety, it does not have anxiety, the more common injury that safety air bag caused is because safety air bag is the at high speed inflation, therefore do not finish as yet in the process of " popping " at it, human body is if be subjected to the air bag bump, with the injury that causes the various orders of severity to differ.The most common is redness, scratch and the bruise that causes face, neck and upper breast.Secondly, if eyes are involved, corneal abrasion, hyphema, subluxation of lens, detached retina, chemical burn keratitis all may take place.

Therefore, how reducing the injury that safety air bag causes, really is dealer institute problem demanding prompt solution.

Summary of the invention

In order to overcome the danger that existing safety air bag is caused, the problem to be solved in the present invention provides and a kind ofly can reduce the safety air bag incident of burning, and improves safe automobile air bag generation device safe in utilization.

In order to address the above problem, the technical scheme of inflator for car safety air bag of the present invention is to reduce the use amount of chemical substance, and makes outside air suction mixing and safety air bag is expanded, and to reduce the temperature of safety air bag, reduces the incident of burning.

And based on technique scheme, the present invention includes: a shell, be hollow housing, its limit, two opposite sides is made as suction end, the outlet side of perforation respectively; A gasbag seat is the outlet side of being located at shell; A gas generation apparatus, comprise a package shell in-to-in extension pipe, one is assembled in the wherein gas producer of an end of extension pipe, a baffle plate that is fixed in enclosure, wherein, extension pipe is on this side perisporium of suction end of shell, cloth is shown several air gates, described gas producer is to communicate with extension pipe inside, it comprises the reinforcement medicine seat that can be installed with chemical substance, the pilot burner set collar, this reinforcement medicine seat perisporium is provided with hot gas and portals, and described baffle plate is to be positioned at extension pipe to be provided with this side of air gate, and that is located at extension pipe keeps a gap with extension pipe on every side, formation is towards the flow channel of the outlet side of shell opening, if a suction end inside that is positioned at shell, and be positioned at the check valve that baffle plate differs from this side of extension pipe.

Compared with prior art, the beneficial effect of inflator for car safety air bag of the present invention is:

Chemical substance is placed in the reinforcement medicine seat, when micro computer is judged as the collision accident, promptly can ignite and strengthen the interior chemical substance of medicine seat, and producing a large amount of nitrogen, nitrogen sprays via the air gate of extension pipe, and is flowed fast towards the outlet side of shell by the flow channel between extension pipe and baffle plate, cause enclosure to be negative pressure state, extraneous air is entered via the check valve of suction end, and nitrogen mixes, the airbag inflated of being located at the outlet side is expanded.Thereby it is the nitrogen that comprises by the chemical reaction gained that the present invention makes the material of airbag inflated, mixes with extraneous space, so can reduce gas-filling temperature, reduces the incident of burning, and improves the safe in utilization of safety air bag.

Description of drawings

Fig. 1 is a perspective exploded view of the present invention;

Fig. 2 is a combination generalized section in plane of the present invention;

Fig. 3 is a sectional schematic diagram of the present invention;

Fig. 4 is the section action scheme drawing of the present invention when using.

The specific embodiment

As shown in Figure 1, inflator for car safety air bag provided by the present invention comprises that a shell shape shell 10, is assembled in shell 10 gas inside generation devices 2, a gasbag seat 40 of being located at shell 10 one of them side, and it further comprises an elastic force plate valve 50 of being located at shell 10 with respect to gasbag seat 30 opposite sides again.Wherein, shell 10 is a ducted body, wherein the limit, two opposite sides is made as the perforation shape, and be defined as suction end 101, outlet side 102 respectively, gasbag seat 40 promptly is located at outlet side 102, the limit, shell 10 two opposite sides that is positioned at outlet side 102 again is provided with the fixed base plate 11 that extends towards the outside, and the limit, two opposite sides is respectively equipped with perforation 12 in addition, places assembling for described gas generation apparatus 2.

Please be simultaneously as shown in Figure 2, described gas generation apparatus 2 comprises that one is assembled in the extension pipe 20, of two perforation between 12 and is assembled in extension pipe 20 wherein the gas producer 30, one of an end are located at the baffle plate 37 of extension pipe 20 towards shell 10 suction ends 101 these sides, wherein, it is to be fixed in the perforation 12 of shell 10 with an end plug 21 sealings that extension pipe 20 is not established gas producer 30 these ends, and extension pipe 20 is shown several air gates 201 towards suction end 101 these end perisporium cloth of shell 10.Described again gas producer 30 comprises a base 31 that is screwed together on the extension pipe 20, one with the base 31 involutory seats of honour that are connected 32, one is fixed on the base 31 and stretches into extension pipe 20 in-to-in filter bowls 33, clipping is fixed in the spoiler 34 between the seat of honour 32 and base 31 inside, one is fixed on the seat of honour 32 in-to-ins and strengthens medicine seat 35, and pilot burner set collar 36 that is fixed on the seat of honour 32, wherein, the seat of honour 32 is with respect to being provided with a combined hole 320 in the middle of base 31 another perisporiums, for described reinforcement medicine seat 35, pilot burner set collar 36 is in conjunction with fixing, strengthening medicine seat 35 is a ducted body towards pilot burner set collar 36 openings, place in the reinforcement medicine seat 35 for chemical substance, strengthening medicine seat 35 stretches into the seat of honour 32 inner these perisporiums and is provided with several hot gas and portals 350, and described spoiler 34 is established a disk body of being located between 32 internal perisporiums of the seat of honour, and cloth is shown several through holes 340 on the plate body.

Being provided with one in the middle of the described base 31 runs through perisporium and is communicated with the seat of honour 32 in-to-in combined holes 310, described filter bowl 33 promptly is assembled in this combined hole 310 towards extension pipe 20 inner these ends, the filter bowl 33 inner and seat of honour 32 internal communication, and filter bowl 33 perisporiums are provided with several through holes 330, and filter bowl 33 periphery walls coat with a filter screen 331 again.

Extension pipe 20 differs from outlet side 102 these sides and is provided with described baffle plate 37, elastic force plate valve 50 in regular turn again, this baffle plate 37 be one be fixed on shell 10 two the perforation 12 between, and be positioned at extension pipe 20 and differ from outlet side 102 these sides, baffle plate 37 is made as Openworks shape towards the outlet side of shell 10 102 these ends, has the gap between the periphery wall of baffle plate 37 and extension pipe 20 and forms the flow channel 371 (as shown in Figure 3) of U-shaped.And elastic force plate valve 50 is a check valve that makes air by the outside input, and in the middle of this preferred embodiment, the elastic force thin plate of this elastic force plate valve 50 for slightly being in the shape of the letter V under the normality, supports the internal perisporium that reaches shell 10 slightly with its side.

Above-mentioned is composition member of the present invention, it uses situation as shown in Figure 2, in strengthening medicine seat 35, fill chemical substance A, assembling one pilot burner B in the pilot burner set collar 36, a full air bag C then is installed in the gasbag seat 40, when automobile has an accident, when micro computer is judged as the collision accident, promptly can make pilot burner B on the pilot burner set collar 36, make chemical substance A generation chemical change and disengage a large amount of nitrogen, nitrogen is promptly fast by the through hole 340 on the spoiler 34, the combined hole 310 of base 31, filter bowl 33, filter screen 331 and entering in the extension pipe 20, and owing to only have air gate 201 to communicate with the external world on the perisporium of extension pipe 20, so high-revolving nitrogen promptly can be as shown in Figure 4, by air gate 201, and enter flow channel 371 between extension pipe 20 and the baffle plate 37, and since elastic force plate valve 50 blocks in the suction end 101 of shell 10, and flow channel 371 is towards shell 10 outlet sides 102 openings, so nitrogen can be towards the outlet side 102 is disengaged and safety air bag C is inflated, and nitrogen is in the middle of the process of outwash, can make the shell 10 inner negative pressure that form, therefore, outside air promptly can be sucked by suction end 101, by elastic force plate valve 50, flow to outlet side 102 and be full of safety air bag C.

From the above, the nitrogen that inflation material of the present invention goes out with chemical reaction, and outside air mixes, about 1/3 is reactive material, and 2/3 be outside air, so can reduce the temperature of safety air bag, reduces the accident of burning that causes because of air bag safe in utilization.

Claims

1, a kind of inflator for car safety air bag is characterized in that: comprise

A shell is hollow housing, and its limit, two opposite sides is made as suction end, the outlet side of perforation respectively,

A gasbag seat is the outlet side of being located at shell;

A gas generation apparatus, comprise a package shell in-to-in extension pipe, one is assembled in the wherein gas producer of an end of extension pipe, a baffle plate that is fixed in enclosure, wherein, extension pipe is on this side perisporium of suction end of shell, cloth is shown several air gates, described gas producer is to communicate with extension pipe inside, it comprises a reinforcement medicine seat that can be installed with chemical substance, a pilot burner set collar, this reinforcement medicine seat perisporium is provided with hot gas and portals, and described baffle plate is to be positioned at extension pipe to be provided with this side of air gate, and that is located at extension pipe keeps a gap with extension pipe on every side, forms the flow channel towards the outlet side of shell opening

If a suction end inside that is positioned at shell, and be positioned at the check valve that baffle plate differs from this side of extension pipe.

2, inflator for car safety air bag according to claim 1 is characterized in that: described check valve is a rubber-like V-arrangement elastic force plate valve.

3, inflator for car safety air bag according to claim 1 and 2, it is characterized in that: described gas producer comprises a hollow filter bowl that stretches in the extension pipe, the filter bowl perisporium is provided with several through holes, and other is provided with a filter screen that is positioned at the filter bowl periphery wall.

4, inflator for car safety air bag according to claim 3, it is characterized in that: described gas producer comprises that a base that is screwed together in extension pipe one end, one and the involutory seat of honour that is connected of base, clipping are fixed in the spoiler between the seat of honour and the base inside, the big a plurality of through holes of Boulez on this spoiler, and described filter bowl promptly is located on the base and stretch into extension pipe inside, described reinforcement medicine seat then is fixed on the seat of honour, and the inside between the seat of honour and base, the pilot burner set collar then is fixed in the seat of honour.

5, inflator for car safety air bag according to claim 4 is characterized in that: limit, perisporium two opposite sides is respectively equipped with a fixed base plate outside described the shell.