KR19990017533A - Vehicle seat belt airbag device and control method - Google Patents

Abstract

The present invention relates to a seatbelt airbag device for a vehicle for protecting an occupant from a primary shock and more mitigating a shock and injury to a passenger from a secondary shock. The seat belt airbag device of the vehicle is a three-point seat belt of a vehicle comprising an upper anchor, a lower anchor, a retractor, a tongue plate, a buckle, etc., a belt having a structure in which gas is pushed in and expanded to the outside Webbing, seatbelt mounting sensor to detect whether the occupant is wearing the seatbelt, shock sensor to detect collisions and collisions from the outside of the vehicle, and the output value of the sensors to the interior of the belt webbing A controller for generating an output control signal to an inflator by determining a state in which the gas needs to be press-fitted, and an inflator that receives the output control signal of the controller and burns the gas generating agent to expand the belt webbing to the outside. do. The seatbelt airbag device of the vehicle expands the belt webbing in the event of a collision of the vehicle to perform a part of the airbag, thereby protecting the occupant from injuries caused by chest compressions and abdominal compression of the occupant and reducing the length of the belt webbing. It has the effect of acting as a pre-tensioner to ensure the initial restraint and as a load limiter.

Description

Vehicle seat belt airbag device and control method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seatbelt airbag device of a vehicle, and more particularly to a seatbelt airbag device of a vehicle for protecting a passenger from a primary shock and further alleviating a shock and injury to a passenger from a secondary shock. will be.

Typically, traffic accidents have increased along with the development of vehicles. In addition, legislation has been enacted in each country to reduce the death toll from traffic accidents. In particular, from the standpoint of protecting passengers after a collision or collision of vehicles,

It has been actively done. In considering the safety of the vehicle, the prediction of the danger in the event of or after a collision and the avoidance of the risk must be considered simultaneously. In this respect, passenger protection devices are required to be installed. The seat belt, which is a kind of the passenger protection device, reduces the deceleration applied to each part of the passenger's body during the frontal collision of the vehicle. It is also the most effective means of preventing passengers from jumping out of the vehicle while preventing secondary collisions or mitigating their impacts. The seat belt may be used in various forms, but the most common type of three-point seat belt is a combination of a waist belt restraint wrap belt and a shoulder restraint shoulder belt.

1 is a schematic view showing a three-point seat belt of a vehicle according to the prior art.

The three-point seat belt 12 of the vehicle includes an upper anchor 14, a lower anchor 16, a retractor 18, a tongue plate 20, a buckle 22 and the like.

When using the above method, the three-point seat belt of the vehicle protects the occupant from the primary shock and the secondary shock when the vehicle collides, but the passenger is shocked against chest compressions and abdominal compression by wearing the three-point seat belt. There was a problem that could not alleviate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a seatbelt airbag apparatus for a vehicle that can firstly restrain passengers in the event of a vehicle collision, and can secondarily reduce passenger injuries due to belt webbing.

In order to achieve the above object, the present invention is a three-point seat belt of a vehicle comprising an upper anchor, a lower anchor, a retractor, a tongue plate, a buckle, etc., the gas is pressurized inside to expand the structure to the outside Belt webbing with a seat belt seat detection sensor for detecting the state of the occupant wearing a seat belt, a shock sensor for detecting collisions and weights from the outside of the vehicle, and the output of the sensors to receive the belt webbing A controller which determines a state of injecting gas into the controller and generates an output control signal through an inflator, and an inflator that receives the output control signal of the controller and burns a gas generating agent to expand the belt webbing to the outside. It is characterized by including the configuration.

1 is a schematic view showing a three-point seat belt of a vehicle according to the prior art;

Figure 2 is a schematic diagram showing a seat belt airbag device of a vehicle according to an embodiment of the present invention.

FIG. 3A is a partial perspective view in which part of a state in which gas is not press-fitted into the belt webbing shown in FIG.

FIG. 3B is a partial perspective view in which part of a state in which gas is pressurized into the inside of the belt webbing shown in FIG.

Figure 4 is a block diagram of a seat belt airbag device of a vehicle according to an embodiment of the present invention.

5 is a control flowchart of a seat belt airbag device of a vehicle according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components, even if displayed on different drawings. In describing the present invention, it should be noted that specific descriptions of well-known functions or configurations are omitted in order not to disturb the gist of the present invention.

Figure 2 is a schematic diagram showing a seat belt airbag device of a vehicle according to an embodiment of the present invention. FIG. 3A is a partial perspective view in which part of the state in which gas is not press-fitted into the belt webbing 28 shown in FIG. FIG. 3B is a partial perspective view in which part of a state in which gas is pressurized into the belt webbing 28 shown in FIG. Figure 4 is a block diagram of a seat belt airbag device for a vehicle according to an embodiment of the present invention.

With reference to the drawings will be described the configuration and function of the seat belt airbag device of a vehicle according to an embodiment of the present invention.

The seat belt airbag device of the vehicle is a belt webbing in a three-point seat belt of a vehicle comprising an upper anchor 14, a lower anchor, a retractor 18, a tongue plate 20, a buckle 22 and the like. 28, the seat belt mounting sensor 30, the impact sensor 32, the controller 34, the inflator 26 and the like. The upper anchor 14 supports the three-point seat belt 24. The retractor 18 functions to allow the three-point seat belt 14 to be drawn out or rewound. The three-point seat belt 24 withdrawn from the retractor 18 is coupled to the tongue plate 20 is inserted into the buckle 22 via the upper anchor 14. The belt webbing 28 has a structure in which gas is pushed in and expanded to the outside. The seat belt mounting detection sensor 30 detects a state of whether the occupant wears the seat belt. The impact sensor 32 detects a collision and a collision from the outside of the vehicle. The impact sensor 32 is mounted on a cantilever beam having one end fixed to a vehicle body, and when the deceleration of the vehicle is applied to the cantilever beam, the cantilever beam is bent by mass, so that the gauge resistance is changed to change the output of the resistance bridge circuit. Center G sensor. The controller 34 receives output values of the sensors and determines a state in which gas needs to be pushed into the belt webbing 28 to generate an output control signal to the inflator 26. The inflator 26 receives the output control signal of the controller 34 to burn the gas generating agent to inflate the belt webbing 28 to the outside. The inflator 26 is fixed to the bottom surface of the vehicle body, and one end of the belt webbing 28 is coupled by adding a function of a lower anchor, thereby forming a gas flow path. At the center of the inflator 26 is a squib. When the current flows through the squib instantaneously, the heater generates heat and ignites the gunpowder. This becomes an ember and is ignited by an enhancer to burn a gas generating agent and generate a large amount of nitrogen gas in an instant. The generated nitrogen gas is cooled through the filter and enters the belt webbing 28. The belt webbing 28 thus expands outward to protect the thorax and abdomen of the occupant. In the case of a three-point seat belt 24 mounted to the driver's seat is to pass the waist or pelvis past the left shoulder of the driver. When gas is press-fitted into the belt webbing 28, the shape of the belt webbing 28 is an obtuse angle and then an acute angle. In addition, the overall length of the belt webbing 28 is reduced to serve as a pretensioner, and a portion in which the occupant and the belt webbing 28 contact each other absorbs the impact amount of the passenger to serve as a load limiter.

5 is a control flowchart of a seat belt airbag device of a vehicle according to an embodiment of the present invention.

With reference to the drawings described above will be described in detail the operation of the seat belt airbag device of a preferred embodiment of the present invention.

Now, when the apparatus as shown in FIG. 4 is operated, the controller 34 reads the output value of the seat belt mounting sensor 30 in step 101 of FIG. 5 to detect whether the driver wears the seat belt. When the controller 34 determines that the driver wears the seat belt in step 101, the controller 34 proceeds to step 102. In step 102, the controller 34 reads the output value of the impact sensor 32 and the vehicle collides with the outside. Detect whether you are in a state of impact such as a collision. If it is determined in step 102 that the vehicle is in an impact state, the controller 34 proceeds to step 103 to determine whether it is necessary to press gas into the belt webbing 28. If it is determined that the controller 34 needs to press the gas into the belt webbing 28 in step 103, the controller 34 sends an output control signal to the inflator 26 from the inflator 26. The gas is pressurized into the belt webbing 28.

When the controller 34 determines that the driver does not wear the seat belt as a result of the search of step 101 described above, or determines that a shock is not detected in the vehicle in step 102, the above-described serial process To exit.

In addition, if it is determined that the controller 34 does not need to press gas into the belt webbing 28 in step 103, the controller 34 jumps to step 102 described above and repeatedly executes the above-described series of steps.

As described above, the seatbelt airbag device of the vehicle according to the embodiment of the present invention inflates the belt webbing during the collision of the vehicle to perform some of the functions of the airbag, thereby preventing the occupant from injury due to chest compression and abdominal compression of the occupant. The length of the belt webbing, which is protected and reduced, has the effect of acting as a pre-tensioner and a load limiter to ensure the initial restraint.

Claims (5)

In a three-point seat belt of a vehicle comprising an upper anchor, a lower anchor, a retractor, a tongue plate, a buckle, and the like, a belt webbing having a structure in which gas is pressurized and expanded to the outside, and a passenger wears the seat belt. It is necessary to inject gas into the belt webbing by inputting the output values of the sensors and the seat belt detecting sensor to detect whether it is worn, the impact sensor to detect collisions and collisions from the outside of the vehicle, and the like. And a controller for generating an output control signal to an inflator by judging a state, and an inflator that receives the output control signal of the controller and burns a gas generating agent to expand the belt webbing to the outside. Seat belt airbag device. The resistance sensor of claim 1, wherein the impact sensor is mounted on a cantilever beam having one end fixed to a vehicle body, and the deceleration of the vehicle is applied to the cantilever beam so that the cantilever beam is bent by mass to change the gauge resistance. A seat belt airbag device for a vehicle, characterized in that the output is a center G sensor. The seat belt airbag apparatus of claim 1, wherein the inflator is fixed to a bottom surface of the vehicle body, and one end of the belt webbing is coupled by adding a function of a lower anchor, and a gas flow path is formed. . The seat belt airbag apparatus of claim 1, wherein the gas pressurized into the belt webbing is nitrogen gas. In the control method of the vehicle seat belt airbag device, the process of detecting whether the occupant is wearing the seat belt, the collision and collision from the outside of the vehicle is required to press the gas into the belt webbing from the inflator A control method of a vehicle seat belt airbag device comprising a control process of determining whether there is.