KR20020078285A - a car crash perception device of air bag system - Google Patents

Abstract

PURPOSE: An apparatus for detecting shock in an air bag system is provided to protect occupants when a vehicle accident occurs by preventing an air bag from being erroneously operated caused by an electromagnetic wave. CONSTITUTION: An upper guide(2) and a lower guide(3) are fixed to upper and lower portions of a case(1). An N-pole magnet(4) is inserted into a middle part of the upper guide(2). A front S-pole magnet(6) and a rear S-pole magnet are installed between the upper guide(2) and the lower guide(3). A front shock switch(8) and a rear shock switch(9) are installed at the front S-pole magnet(6) and rear S-pole magnet in opposition to each other. Electric wires(10,11) are connected to the front shock switch(8) and rear shock switch(9). The electric wires(10,11) extend out of the case(1) so as to be connected to a control unit of an air bag system.

Description

{A car crash perception device of air bag system}

The present invention relates to a collision detection device of a vehicle airbag system, and more particularly to a collision detection device of a vehicle airbag system that can prevent malfunctions due to electromagnetic waves, and can detect a two-way collision of the front and rear.

In general, an airbag system for a vehicle is provided with a collision detection device. The collision detection device detects an impact generated when a vehicle crashes and sends a collision signal to the control unit. It can be operated to deploy the airbag to protect the driver and passenger.

In many cases, a piezoelectric sensor is used as a collision detection device of an airbag system, which is an electric signal generated from a piezoelectric sensor by pressing a piezoelectric sensor when a steel ball, which is restrained by a spring, moves forward. It was composed of a structure that is delivered to.

However, the piezoelectric sensor is a sensitive electronic component, which is malfunctioned by the influence of surrounding electromagnetic waves, thereby causing a crash signal to generate an impact signal even when the vehicle does not crash. This could cause injury to the impact of the airbag deployment on the upper body of the occupant, and in the case of the driver, there was a risk of not only scaring the driver, but also obstructing the field of vision and causing a large accident.

In addition, only the impact from the front of the vehicle can be detected, and the impact from the rear of the vehicle cannot be detected, so that the airbag is not deployed during the collision, so that the body of the occupant who hit the seat due to the reaction of the primary impact during the collision is leaned forward There was also a problem that the injury value of the occupant is increased because it can not support it.

Accordingly, the present invention has been invented to solve the above problems, the airbag is not affected by electromagnetic waves, the airbag does not malfunction, it is possible to detect the rear collision to protect the occupant in the event of a collision accident The purpose is to provide a collision detection device of the system.

1 is a cross-sectional view of a collision detection device of a vehicle airbag system according to the present invention,

2 and 3 is an operating state diagram of the present invention,

2 is an operating state diagram at the time of the front collision;

3 is an operation state diagram in the rear collision.

* Description of the symbols for the main parts of the drawings *

1: case, 2: upper guide,

3: lower guide, 4: N pole magnet,

5: moving space, 6: front S-pole magnet,

7: rear S pole magnet, 8: front collision switch,

9: rear collision switch, 10,11: electric wire,

12: moving member.

The present invention for achieving the above object, the case, the upper guide and the lower guide mounted inside the case, the N pole magnet provided in the double upper guide, and the front S provided on both sides between the upper and lower guides It is connected to the airbag control unit by being connected to the front and rear collision switches and the front and rear collision switches respectively provided on the pole and rear S-pole magnets, the front and rear S-pole magnets, and the front and rear collision switches. It is composed of a moving member inserted into a moving space formed between the electric wires and the upper and lower guides and made of S-pole magnet.

In other words, the collision of gravity and repulsive force between N pole magnet and S pole magnet is broken during collision, and the moving member moves by inertia force and pushes the collision switch on the front or the rear, so that the collision signal is generated. By not using it, it is not affected by electromagnetic waves.

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

1 is a cross-sectional view of the present invention, in the present invention, the upper guide 2 and the lower guide 3 are respectively fixed to the inner upper and lower portions of the case 1, which is an outer body, of which the middle portion of the upper guide 2 The N pole magnet 4 is inserted into and installed (in the installed state, the inner surface of the N pole magnet 4 forms the same continuous surface as the inner surface of the upper guide 2), and the upper guide 2 and the lower portion. Front S-pole magnets 6 and rear S-pole magnets 7 are provided on both sides between the guides 3, respectively, and on opposite surfaces of the front S-pole magnets 6 and the rear S-pole magnets 7, respectively. The front collision switch 8 and the rear collision switch 9 are installed, and the front collision switch 8 and the rear collision switch 9 are connected with wires 10 and 11, respectively. It extends outside of the case 1 and is connected to the control unit of the airbag system, while between the upper and lower guides 2 and 3 and both front and rear S-pole magnets 6 and 7. Within the movement space (5) it consists of a structure in which a built-in moving member 12 made of a S pole magnets.

Therefore, in the normal state, the movable member 12 is moved by the attraction force with the N pole magnet 4 of the upper guide 2 and the repulsive force with the front and rear S pole magnets 6 and 7 on both sides. 5) located in the middle part.

However, when a front collision occurs while driving, as shown in FIG. 2, the moving member 12 overcomes the attraction force of the N-pole magnet 4 and the repulsive force of the front S-pole magnet 6 by the driving inertia. It moves toward the pole magnet 6 and presses the front collision switch 8 to generate a collision signal, which is transmitted to the control unit via the wire 10 to deploy the airbag.

On the contrary, when the vehicle collides in the rear, as shown in FIG. 3, the moving member 12 moves backward to press the rear collision switch 9 to generate a collision signal so that the airbag can be deployed.

In this way, the movable member 12, which is located in the middle of the movable space 5 due to the magnetic balance between the movable member 12 itself, the N-pole magnet 4 and the front and rear S-pole magnets 6 and 7, By moving forward or backward according to the collision direction of the front and rear, and pressing the corresponding collision switch (8, 9), it is possible to detect both the front and rear, that is, the collision in both directions. The passenger's body can be protected.

In addition, since a component that may be affected by electromagnetic waves is not used in constructing the collision sensing device, the malfunction of the airbag is prevented even though the collision is not caused by malfunction due to the influence of surrounding electromagnetic waves.

In addition, since the spring that restrains the steel ball in the conventional collision detection device is not used, there is an advantage that the structure is simplified.

On the other hand, in the present invention, the magnetism of the component having magnetic force may be switched to the opposite polarity, that is, the polarities of the magnets installed in the upper guide and the polarities of the magnets and the moving members on both the front and rear sides may be reversed. The polarities of the magnets on both sides of the rear and the moving member shall be the same.

As described above, according to the present invention, since both front and rear collisions are sensed, the airbag can be deployed even during a rear collision, thereby protecting the occupant's body and preventing the morning sun due to electromagnetic waves. It is possible to reduce the risk of causing the effect of improving the overall safety.

Claims (1)

A case 1, an upper guide 2 and a lower guide 3 mounted inside the case 1, an N-pole magnet 4 provided in the double upper guide 2, and the upper and lower guides ( The front S-pole magnets 6 and the rear S-pole magnets 7 provided on both sides between 2 and 3, and the front collision switch 8 and the rear which are provided on the front and rear S-pole magnets 6 and 7, respectively. The electric wires 10 and 11 connected to the collision switch 9, the front and rear collision switches 8 and 9, which extend outwardly of the case 1, and are connected to the airbag control unit; A collision detection device for an automotive airbag system, comprising a moving member (12) inserted into a moving space (5) formed between (2,3) and composed of S-pole magnets.