KR20000015546A - Inflator structure of hybrid type air bag device - Google Patents

Abstract

PURPOSE: An inflator structure of a hybrid type air bag device is provided to improve the safety of passengers when a vehicle collides. CONSTITUTION: The manifold(14) makes up the inflator(8) in the hybrid type guest seat air bag module(4), and its inside a reflective body(20) for regulating to make a non activation gas(11) flow into the air bag(16) after the non-activation gas is exhausted through the gas emitting hole(13) of the manifold in a vertical direction not to make the emitting angle of the non-activation gas deflect, which is exhausted into the inner part of the air bag through the gas emitting hole(13).

Description

Inflator Structure of Hybrid Airbag Device

The present invention relates to an inflator structure of a hybrid type airbag device, and in particular, to induce a deployment direction of an airbag deployed toward a passenger occupying a passenger seat in a car crash accident to a direction favorable for coping with a collision, so as to improve occupant safety. The inflator structure of the hybrid type airbag device.

In general, a car is equipped with an airbag device together with a seat belt as a safety device for passengers in case of a collision. The airbag device is divided into a front seat (a driver's seat and a passenger seat) and a rear seat in a vehicle and collides with each other. It is designed to protect passengers in each seat from injury caused by shock.In recent years, the SRS (Supplemental Restraint System) type airbag device that controls the tension of the airbag module and the seat belt at the same time is widely used. There is a situation.

That is, in the above-mentioned airbag apparatus, the front airbag apparatus installed in the front seat side of the vehicle interior, as shown in FIG. 1, the driver's seat airbag module 2 mounted inside the center of the driver's steering wheel 1 and the front passenger's seat. It consists of a passenger seat airbag module (4) embedded on the front dashboard (3), the airbag module (2, 4) of the driver's seat and the passenger seat, respectively, the engine control unit (5) installed in the bottom of the center floor console and The wire harness 6 is connected and connected, and the engine control unit 5 is also connected to it via the wire harness 6 so as to receive power from the battery 7 mounted in the vehicle.

Here, the engine control unit 5 is provided with an acceleration / deceleration sensor (not shown) that detects a change in the traveling speed of the vehicle while driving therein, and this acceleration / deceleration sensor is used for accelerating / deceleration in the driving vehicle. When the detected acceleration / deceleration degree is higher than a predetermined standard after detecting the change of the degree of movement, that is, when it is determined that the driving vehicle has caused the collision accident, the deployment signal to the airbag modules 2 and 4 of the driver's seat and the passenger seat Is to be applied.

Meanwhile, unlike the driver's seat airbag module 2, the passenger seat airbag module 4 has a relatively far distance from the occupant at the time of deployment due to a collision, and thus, a peony, a ignition agent, a gas generator, and a diffuser screen (not shown above) Since there are a plurality of inflators equipped with a plurality of inflators, the gas injected into the airbags can be introduced quickly within a short time. In addition to the gas generated by the high-pressure compressed gas to deploy the airbag in a short time is a relatively low-cost and is usually equipped with an airbag module called a hybrid type (Hybrid Type).

That is, the hybrid airbag module used in the passenger seat airbag module 4 as described above is mounted in the dashboard 3 as shown in FIG. The inflator 8, which is configured to inject combustion gas and high-pressure compressed gas into the inside and expands it, supplies the applied power of the battery 7 to the side via a wire harness 6 connected from the engine control unit 5. A detonating agent (9) to be received and ignited and a storage unit (10) accommodating a gas generator therein, and an inert gas (11) of argon flow compressed to a high pressure therein while being coupled to the outside of the storage unit (10). A gas bomb 12 stored therein and a manifold 14 having a plurality of gas injection holes 13 circumferentially coupled to the gas bomb 12.

In addition, the rupture plate 12a is mounted on the side of the gas spring 12 facing the manifold 14 so that the inert gas 11 compressed to high pressure during a collision breaks the rupture plate 12a. It is introduced into the air bag through the (14), the side of the manifold 14, the storage unit 10, the gas spring 12 and the manifold 14 is fixedly mounted in the dashboard (3) The mounting bolt 15 is fixed.

On the other hand, although the airbag of the passenger seat airbag module 4 is not shown in Figure 2 is mounted on the outside so that the airtight with them to accommodate the storage unit 10, the gas spring 12 and the manifold 14 therein do.

Accordingly, when the acceleration / deceleration of the vehicle is changed to a predetermined standard or more during a crash of the vehicle, the acceleration / deceleration sensor of the engine control unit 5 detects the power and supplies the power of the battery 7 to the driver's seat airbag module 2. ) And the passenger airbag module 4 is applied to each of the airbags to be deployed. In particular, the airbag of the passenger-side hybrid airbag module 4 is a detonating agent that is supplied with the power of the battery 7 through the wire harness 6. 9 explodes to combust the gas generating agent in the reservoir 10, and then the gas expanded in volume as the gas generating agent pressurizes the compressed inert gas 11 to the high pressure in the gas spring 12. The inert gas 11 in the pressurized gas spring 12 is introduced into the manifold 14 by breaking the rupture plate 12a of one side and introduced into the air bag through the gas injection hole 13. In this way, Active gas 11 are thereby deploy the air bag within a short period of time to thereby buffer the impact applied to the occupant of the front passenger's seat.

However, in the conventional hybrid passenger seat airbag device, a high-pressure compressed inert gas 11 flowing into the airbag through the gas injection hole 13 of the manifold 14 when the airbag is deployed due to the collision of the vehicle is illustrated. As shown in FIG. 2, the gas in the manifold 14 flows from the inside of the manifold 14 to the mounting portion of the mounting bolt 15 and then is discharged through the gas injection hole 13 in the reflected state. As shown in FIG. 3, the flow direction of the inert gas 11 discharged through the injection hole 13 is discharged at an angle deflected by approximately "θ" with respect to the reference point of the vehicle body and the occupant, wherein the gas injection hole There is a separation distance between the mounting bolt 15 and the mounting bolt 15, and the flow of the inert gas 11 that is reflected at the mounting portion of the mounting bolt 15 and then discharged to the gas injection hole 13 The direction is slightly inclined Due to this, the flow of the inert gas 11 introduced into the airbag 16 after the collision is biased in one direction, and thus the airbag 16 is deployed to be deflected in one direction of the passenger 17 in the passenger seat. There has been a drawback that there are obstacles in achieving safety by fully restraining and cushioning the passengers 17 during deployment.

In the figure, reference numeral 18 denotes a back seat of the passenger seat.

Accordingly, the present invention has been made to solve the above disadvantages, the inert gas in the gas spring due to the explosion of the initiator is introduced into the air bag through the gas injection hole of the manifold to the flow direction of the inert gas It is an object of the present invention to provide an inflator structure of a hybrid airbag device, which is capable of achieving safety while reducing injuries of passengers by performing the restraint of passengers more effectively during the initial deployment of the airbag.

The present invention for achieving the above object, the storage unit for receiving the initiator and the gas generator ignited by the applied power, the gas spring coupled to the storage unit for storing the inert gas compressed at high pressure, In the inflator of the hybrid airbag device, which is composed of a manifold having a plurality of gas injection holes circumferentially coupled to the gas bomb, the compressed gas discharged into the air bag through the gas injection hole is not deflected inside the manifold. The conical reflector provided with the circumferential surface which the vertex points to the bursting plate of a gas spring, and the connection part which fixes the bottom surface of this circumferential surface to a mounting bolt side so that a vertex may be provided is provided.

Figure 1 schematically shows a state in which a conventional airbag device is mounted on a conventional vehicle

Illustrated Perspective,

Figure 2 is mounted in the dashboard of the passenger seat of the airbag device shown in Figure 1

Cross-sectional view showing the structure of the inflator in the airbag module,

Figure 3 is a passenger seat airbag with the inflator shown in Figure 2 is deployed in the event of a crash

A schematic showing the state,

Figure 4 is in the airbag module mounted in the dashboard of the passenger seat according to the invention

Cross section showing the structure of the inflator,

5 is an enlarged perspective view illustrating main parts of FIG. 4;

FIG. 6 shows a passenger seat airbag with the inflator shown in FIG. 4 deployed during a crash. FIG.

It is a schematic diagram which shows the state.

<Description of Symbols for Main Parts of Drawings>

1-Steering Wheel 2-Driver Airbag Module

3-dashboard 4-passenger seat airbag module

5-engine control unit 6-wire harness

7-battery 8-inflator

9-Initiator 10-Storage

11-inert gas 12-gas bomb

13-gas injection hole 14-manifold

15-mounting bolt 16-airbag

17-Passenger 18-Backrest

20-reflector 21-base

22-sided 23-connection

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a cross-sectional view showing the structure of the inflator in the airbag module mounted in the dashboard of the passenger seat according to the invention, Figure 5 is an enlarged perspective view of the main portion of Figure 4, Figure 6 is an inflator shown in Figure 4 The passenger seat airbag provided is a schematic diagram showing a state in which the airbag is deployed in the crash, the same reference numerals as in Figs. 1 to 3 showing the configuration of the conventional airbag device while the same reference numerals will be omitted and the detailed description thereof will be omitted. .

As shown in the drawing, the present invention is compressed to a high pressure together with a gas generated by burning an ignition current by an engine control unit 5 including an acceleration / deceleration sensor that is turned on during an accident of a vehicle. The hybrid passenger seat airbag module 4 which deploys the airbag 16 in a short time by using the inert gas 11 which has been made in the inside of the airbag 16 through the gas injection hole 13 of the manifold 14 in case of a collision accident. It is configured to prevent the deflection of the flow direction of the inert gas 11 to be introduced into the passenger 17 to ensure the safety of the passenger 17 in the passenger seat.

To this end, the inert gas 11 discharged into the airbag 16 through the gas injection hole 13 in the manifold 14 constituting the inflator 8 in the hybrid passenger seat airbag module 4. Reflector 20 is adjusted so that the injection angle of the () is not deflected, that is, the inert gas 11 is discharged in a vertical direction through the gas injection hole 13 of the manifold 14 to flow into the air bag 16. ) Is installed.

Here, as shown in FIG. 5, the reflector 20 has a conical shape and an angle of formation of the circumferential surface 22 with respect to the bottom surface 21 is manifold 14 through the rupture plate 12a of the gas spring 12. To guide the inert gas 11 injected into the mounting portion of the mounting bolt 15, which is one side of the mounting bolt 15, in the vertical direction toward the gas injection hole 13 formed on the outer circumferential surface of the manifold 14. Preferably formed.

To this end, the reflector 20 is disposed so that its vertex of the circumferential surface 22 in the manifold 14 faces the rupture plate 12a of the gas spring 12, and the bottom of the reflector 20 is 21 is, of course, to be disposed to face the mounting portion of the mounting bolt 15 in the manifold (14).

In addition, the reflector 20 installed in the manifold 14 may be formed integrally with the mounting bolt 15, or may be separately installed and mounted in the manifold 14, embodiments of the present invention In the lower surface 21 of the reflector 20, the connecting portion 23 is formed to be integrally connected with the head portion 15a of the mounting bolt 15.

Therefore, if the acceleration / deceleration of the vehicle is changed to a predetermined standard or more in the event of a collision of the vehicle, the acceleration / deceleration sensor in the engine control unit 5 detects this and turns the power of the battery 7 to the passenger seat airbag module 4. It is applied to the initiator (9) of the, thereby exploding the gas generator in the storage unit 10 while the initiator (9) explodes, after which the gas expanded in volume by the combustion of the gas generator is a gas spring While pressurizing the inert gas 11 compressed to a high pressure in the 12, the inert gas 11 pressurized in the gas spring 12 breaks the rupture plate 12a of one side and the manifold 14 Inflow into the air bag 16 through the gas injection hole 13, the reflector 20 installed toward the rupture plate 12a of the gas spring 12 in the manifold 14 Compressed gas flowing into the airbag 16 through the gas injection hole 13 By preventing the discharge angle from deflecting, the passenger's airbag 16 embedded in the dashboard 3 is evenly distributed to the front of the passenger 17 so that the airbag 16 and the passenger 17 at the beginning of deployment can be Since sufficient contact surface is secured, an effective shock buffer can be achieved.

As described above, according to the inflator structure of the hybrid type airbag apparatus according to the present invention, a reflector is installed from the inflator of the passenger seat airbag module toward the rupture plate of the gas bomb to the inside of the manifold, so that the vehicle is crashed on the dashboard in the cabin. As the onboard passenger's airbag is deployed optimally toward the front of the passenger by the compressed gas discharged without deflecting from the inside of the manifold to the inside of the airbag via the reflector, restraining force on the passenger during the initial deployment of the airbag. This improvement has the effect of improving the safety of the passengers.

Claims (2)

A gas spring 12 for storing the initiator (9) and the gas generator to receive the ignition power applied to the applied power, and the inert gas (11) compressed to a high pressure while being coupled to the storage (10) And a manifold 14 having a plurality of gas injection holes 13 circumferentially coupled with the gas spring 12, in the inflator of the hybrid airbag device, The circumferential surface 22 in which the vertex points toward the rupture plate 12a of the gas spring 12 so that the compressed gas discharged into the air bag 16 through the gas injection hole 13 is not deflected in the manifold 14. ) And a conical reflector 20 integrally provided with a connecting portion 23 for fixing the bottom surface 21 of the circumferential surface 22 to the mounting bolt 15 side. rescue. The gas injection hole (13) of claim 1, wherein the forming angle of the circumferential surface (22) is such that the compressed gas flowing into the manifold (14) through the rupture plate (12a) of the gas spring (12) is perpendicular to the gas injection hole (13). Inflator structure of the hybrid airbag device, characterized in that set to discharge through.