KR19990027649A - Passenger airbag - Google Patents

Abstract

The present invention relates to a passenger seat airbag device of a vehicle in which a passenger seat airbag is selectively deployed in the event of an accident depending on whether or not an infant seat is attached to the passenger seat.

In the passenger seat airbag device of a conventional vehicle, when a passenger seats an infant seat attached to the passenger seat in the rear direction and the passenger seats the passenger seat airbag in a collision accident, the deployed airbag hits the seat back of the infant seat, which causes a serious injury to the infant. There was a problem giving.

In order to solve this problem, the present invention provides a resonant antenna 103 installed on the bottom surface of the front seat inside the seat cushion of the infant seat to radiate electromagnetic waves and a predetermined distance between the front seat and the rear seat of the car on the upper surface inside the seat cushion of the passenger seat. Resonance between the first resonator 101 and the second resonator 102, and the first resonator 101 and the second resonator 102, which are spaced apart and generate resonance at a frequency of electromagnetic waves radiated from the resonant antenna 103. It is composed of an ignition determination circuit 201 that detects the presence and absence of the infant seat attached to the passenger seat according to the occurrence of the seat, and at the same time detects the deceleration caused by the accident of the car to determine the deployment of the passenger seat airbag. .

Description

Passenger airbag device of automobile

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger seat airbag device of a motor vehicle, and more particularly, to a passenger seat airbag device of a vehicle in which a passenger seat airbag is selectively deployed in the event of an accident depending on whether or not an infant seat is attached to a passenger seat.

As is well known, along with the development of automobiles, the number of vehicles is rapidly increasing, and traffic accidents are also on the rise.

Accordingly, various passenger protection devices have been developed and mounted on automobiles to protect occupants from traffic accidents, and airbag devices are represented as passive passenger protection devices.

The airbag device is to reduce the secondary injury of the passenger by absorbing the kinetic energy of the passenger by causing the bag to inflate the gas momentarily between the passenger and the steering wheel (or the instrument panel) during the frontal collision of the vehicle.

In recent years, in order to more effectively protect passengers from accidents, side impact airbag devices are installed in general front airbag devices to protect passengers from side impacts of automobiles.

The conventional passenger seat airbag device is installed at the front end of the left and right front apron upper members, as shown in the block diagram of FIG. 1 showing the electrical connection relationship of each component and the internal configuration of the airbag electronic control unit (ECU). A front G sensor 11 for detecting a deceleration generated at the time, a center G sensor 12 for detecting an impact acceleration, a separatoring sensor 13 for preventing malfunction of the airbag in response to a deceleration during a front collision of a vehicle; And an airbag ECU 20 incorporating the center G sensor 12 and the separatoring sensor 13 and installed on the floor panel of the vehicle front front center to output an airbag deployment signal according to the input of the ignition determination circuit 21. And an inflator (30) having a squib (31) containing a small amount of gunpowder around the electric heater wire and having a passenger seat airbag deployed therein according to the output signal of the airbag ECU (20). Including has been composed of a passenger seat air bag module (not shown).

In the drawing, reference numeral B denotes a battery, IGN denotes an ignition switch, 32 denotes a spiral cable, and 41 denotes a large capacity capacitor and a DC-DC converter. 42 is a memory circuit, 43 is a diagnosing circuit, 44 is a diagnosing connector, and 45 is an airbag warning light.

Referring to Figure 1 attached to the conventional operation configured as described above are as follows.

First, in a low speed collision of a vehicle, deceleration is generated first in the front part of the vehicle body, and a deceleration is sensed in the front G sensor 11, and in the case of a high speed collision, the deceleration is generated almost simultaneously at the front G and the front G sensor. The deceleration is sensed by 11 and the center G sensor 12.

The setting G of the separating sensor 13 is smaller than the values of the center G sensor 12 and the front G sensor 11, and responds only to the deceleration at the time of front collision.

Next, the airbag ECU 20 receives the outputs of the center G sensor 12 and the front G sensor 11 by the ignition determination circuit 21 and performs OR logic. The output is ANDed to output the airbag deployment signal to the inflator 30 only at the time of impact due to the collision of the vehicle.

Accordingly, when a current flows instantaneously in the squib 31 provided in the center of the inflator 30, the heater generates heat to ignite the gunpowder and burn the gas generating agent.

Nitrogen gas generated by the combustion of the gas generating agent is cooled through the filter to enter the passenger seat air bag, and the passenger seat air bag breaks the opening of the pad installed in the steering wheel and expands to the outside to protect the head and chest of the passenger.

At this time, the backup power supply 41, when the electric wiring is disconnected in the event of a collision, when the power supply to the airbag ECU 20 is cut off, the charge stored in the backup capacitor is discharged to back up the circuit in the range indicated by the broken line in the figure. The ignition current is supplied to the cub 31.

However, the conventional passenger seat airbag device detects only the deceleration caused by the collision of the vehicle to determine whether the passenger seat airbag is deployed, and therefore it is different from whether the infant seat is attached to the passenger seat when attaching the passenger seat to the car. Independently of the passenger seat airbags.

Therefore, when the passenger seats the infant seat with the infant seat attached to the passenger seat in the rear direction (the seat back of the infant seat is located in the front direction of the passenger seat), the passenger's protection function of the airbag is prevented when the passenger seat airbag is deployed due to the collision of the car. Not only is it lost, but the deployed airbag hits the seat back of the infant seat, which causes a serious injury to the infant.

Accordingly, the present invention has been proposed to solve the above problems of the prior art, and provides a passenger seat airbag device of a vehicle to selectively deploy a passenger seat airbag when an accident occurs according to whether or not an infant seat is attached to the passenger seat. Its purpose is to.

Technical means of the present invention for achieving this object, the electromagnetic radiation means for radiating the electromagnetic wave is installed at a predetermined position of the infant seat, and the resonance at the frequency of the electromagnetic waves installed at the predetermined position of the passenger seat seat radiated by the electromagnetic radiation means The presence of the plurality of resonator means and the infant seat to be attached to the passenger seat according to the resonance generated by the plurality of resonator means and the form of the attachment and at the same time detect the deceleration caused by the accident of the car Airbag control means for judging whether or not the passenger seat airbag is deployed, and the passenger seat airbag is deployed in accordance with the output signal of the airbag control means, while the infant seat is positioned in the rear direction of the passenger seat (the seat back of the infant seat is positioned in the front direction of the passenger seat). That does not deploy the passenger seat airbag when attached It features a senior airbag module.

1 is a block diagram of a passenger seat airbag device of a conventional vehicle.

Figure 2 is a block diagram of a passenger seat airbag device of a vehicle according to the present invention.

FIG. 3 is a view showing an installation position of a first resonator and a second resonator and an installation position of a resonant antenna shown in FIG. 2;

*** Explanation of symbols for the main parts of the drawing ***

101: first resonator 102: second resonator

103: resonant antenna 201: ignition determination circuit

200: Electronic Bag Control Unit (ECU)

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

Figure 2 shows a block diagram of a passenger seat airbag device of a vehicle according to the present invention, the same configuration as the conventional passenger seat airbag device is indicated by the same reference numerals as in FIG. 3 shows the installation position of the first resonator 101 and the second resonator 102 and the installation position of the resonant antenna 103 shown in FIG. 2.

As shown in the figure, the present invention is provided on the bottom of the inner front side of the seat cushion 2b for the infant seat 2 to radiate electromagnetic waves, and to the passenger seat 1 seat cushion 1b. A first resonator 101 and a second resonator 102 installed at a predetermined distance from each other in a front-rear direction of a vehicle on an inner upper surface thereof to generate resonance at a frequency of electromagnetic waves emitted from the resonant antenna 103; According to whether the first resonator 101 and the second resonator 102 generate resonance, the presence or absence of the seat and the form of attachment of the infant seat 2 attached to the passenger seat 1 are sensed, A small amount of gunpowder around the electric heater wire and the airbag ECU 200 installed on the floor panel of the vehicle front center, including an ignition determination circuit 201 that detects the deceleration by the vehicle and determines whether the passenger seat airbag is deployed. The contained squib 31 is embedded in the center portion to deploy the passenger seat airbag according to the output signal of the airbag ECU 20, but the infant seat is positioned in the rear direction of the passenger seat (the seat back of the infant seat is located in the front direction of the passenger seat). Is attached to a passenger seat airbag module (not shown) including an inflator 30 that does not deploy the passenger seat airbag.

In FIG. 3, reference numeral 1a is a seat back of the passenger seat 1, and 2a is a seat back of the infant seat 2.

Referring to Figures 2 and 3 attached to the operation and effect of the present invention configured as described above are as follows.

First, when the infant seat 2 is attached to the passenger seat 1 in the rear direction, that is, the seat back 2a of the infant seat 2 is positioned in the front direction of the passenger seat 1, the infant seat 2 is attached. The resonance antenna 103 provided on the inner front side bottom surface of the seat cushion 2b emits electromagnetic waves.

Then, the second resonator 102 is installed on the inner upper surface of the passenger seat 1, the seat cushion 1b in the rear direction of the vehicle, and the second resonator 102 which generates resonance at the frequency of electromagnetic waves emitted from the resonance antenna 103 is the resonance antenna 103. ), The resonance occurs, and since the first resonator 101 spaced apart from the second resonator 101 by a predetermined distance in the front direction of the vehicle is spaced apart from the resonance antenna 103, the resonance does not occur.

Accordingly, the ignition determination circuit 201 in the airbag ECU 200 installed on the floor panel of the vehicle front center is subjected to the infant seat 2 according to whether the first resonator 101 and the second resonator 102 have a resonance. Is detected to be attached to the passenger seat 1 in the rear direction.

Then, the ignition determination circuit 201 in the airbag ECU 200 receives the output of the center G sensor 12, the front G sensor 11, and the separating sensor 13, and logically calculates the result of the passenger seat airbag. In this case, the airbag deployment signal is not output to the inflator 30.

Therefore, since the current does not flow in the squib 31 installed in the center of the inflator 30, the passenger seat airbag module (not shown) is not operated.

Next, when the infant seat 2 is attached to the front passenger seat 1 in the front direction, that is, the seat back 2a of the infant seat 2 is positioned to be positioned in the seat back 1a direction of the passenger seat 1. The resonant antenna 103 provided on the inner front side bottom of the infant seat 2 seat cushion 2b emits electromagnetic waves.

Then, the first resonator 101 is installed on the inner upper surface of the passenger seat 1 and the seat cushion 1b in the front direction of the vehicle to generate resonance at the frequency of electromagnetic waves emitted from the resonance antenna 103. ), The resonance occurs, and since the second resonator 102 spaced apart from the first resonator 101 by a predetermined distance in the rear direction of the vehicle is spaced apart from the resonant antenna 103, the resonance does not occur.

Accordingly, the ignition determination circuit 201 in the airbag ECU 200 installed on the floor panel of the vehicle front center is subjected to the infant seat 2 according to whether the first resonator 101 and the second resonator 102 have a resonance. It is detected that the front seat is attached to the passenger seat (1).

Then, the airbag ECU 200 receives the outputs of the center G sensor 12 and the front G sensor 11 by the ignition determination circuit 201 and performs OR logic, and outputs the resultant values and the output of the separator sensor 13. AND logic is performed to output the airbag deployment signal to the inflator 30 when the result of the logical operation is required to deploy the passenger seat airbag.

Accordingly, a current flows through the squib 31 installed in the center of the inflator 30 so that the passenger seat airbag module (not shown) is operated to deploy the passenger seat airbag. That is, when a current flows instantaneously in the squib 31, the heater generates heat to ignite the gunpowder, and the gas generator is combusted. Breaks the opening of the pad installed on the steering wheel and expands to protect the infant in the passenger seat.

On the other hand, when the infant seat 2 is not attached to the passenger seat 1, resonance does not occur in both the first resonator 101 and the second resonator 102, so that an ignition determination circuit 201 in the airbag ECU 200 is provided. ) Detects that the infant seat 2 is not attached to the passenger seat 1.

Then, the airbag ECU 200 performs the same operation as the conventional passenger seat airbag apparatus shown in FIG. 1 to protect the passenger in the passenger seat when an accident of the vehicle occurs.

As described above, according to the present invention, the passenger seat airbag is selectively deployed in the event of an accident depending on whether or not the infant seat is attached to the passenger seat, thereby improving the reliability of the passenger seat airbag.

Claims (3)

An electromagnetic wave radiating means installed at a predetermined position of the infant seat to radiate electromagnetic waves; A plurality of resonating means installed at a predetermined position of the passenger seat and generating resonance at a frequency of electromagnetic waves radiated by the electromagnetic wave radiating means; Detects whether the passenger seat is attached to the passenger seat according to the resonance generated by the plurality of resonating means, and detects whether the passenger seat is attached to the passenger seat and detects the deceleration caused by the accident of the vehicle. Judging airbag control means, The passenger seat airbag is deployed in accordance with the output signal of the airbag control means, but the passenger seat does not deploy the passenger seat airbag when the infant seat is attached to the passenger seat in the rear direction (the seat back of the infant seat is located in the front direction of the passenger seat). A passenger seat airbag device for a vehicle, comprising an airbag module. The method of claim 1, The electromagnetic wave radiating means is a passenger seat airbag device, characterized in that the resonant antenna installed on the inner front side bottom of the seat cushion in the infant seat. The method of claim 1, The plurality of resonator means is a passenger seat airbag device, characterized in that the plurality of resonators are spaced apart from each other by a predetermined distance in the front and rear direction of the car on the inner upper surface of the seat cushion in the passenger seat.