KR100332573B1 - a safety device for vehicle - Google Patents

Abstract

The present invention relates to a collision safety device for preventing the lower body of the occupant when a collision of the vehicle, a collision detection sensor for detecting a collision of the vehicle and outputting the signal, and is installed on the dash panel and quickly elongated when the collision It consists of a cylinder extending means for extending the multi-stage cylinder by operating in accordance with the collision signal of the multi-stage cylinder and the collision detection sensor is pressed on the seat, the expansion means is accommodated in the multi-stage cylinder, for example, the collision signal of the collision detection sensor Depending on the explosives are made. In addition, a key sensor for detecting the insertion of the ignition key to the key box, and an extension motor for extending the multi-stage cylinder at least one step in accordance with the key insertion signal of the key sensor, a part of the multi-stage cylinder when the ignition key is inserted It is properly entered between the occupants' two legs. The present invention can effectively prevent the lower body injury of the occupant by maintaining a constant distance between the two by restraining the movement of the dash panel and the seat by the inertial force at the time of the collision of the vehicle.

Description

Collision safety device for a vehicle {a safety device for vehicle}

The present invention relates to a safety device for a vehicle, and more particularly, a collision safety device for a vehicle that can prevent a lower body such as a driver from being damaged by maintaining a constant distance between a dash panel and a seat during a collision. It is about.

The vehicle is driven on the road at high speed by using the power of the engine. When the vehicle being driven is suddenly decelerated or stopped due to a collision, the occupant such as the driver is sharply moved forward by the inertial force according to the driving. At this time, the upper body, including the head, is more severe and the head and chest are severely hit by the handle or the dash panel, which causes a fatal injury. Accordingly, as shown in FIG. 1, a vehicle includes a seat belt (not shown) and an air bag (air back A) to secure the occupant U to the seat S to protect it from a collision. It is common for safety devices to be provided.

However, these seat belts and airbags (A) are mainly intended to protect the upper body such as the head and chest of the occupant (U) bar, the lower body is almost defenseless, so the lower body injuries such as legs in the event of a collision Appearing. That is, in the event of a severe collision of the vehicle V, the occupants U as well as the seat S are swept forward by inertia. The upper body is somewhat protected by the seat belt and the airbag A to prevent fatal injuries. The lower body, which is not protected by any means, will hit or bend the dash panel (P) as it is, causing severe injuries such as fractures. In particular, the engine is pushed backward due to the impact of the collision, and the lower body of the occupant (U) is pinched between the dash panel and the seat, which causes not only fatal injuries but also impedes rapid action in emergency rescue, leading to death. There was a problem.

The present invention has been made in view of the above-described conventional problems, the vehicle which can prevent the lower body injuries of the occupants to the maximum by maintaining a constant distance between the two by suppressing the movement of the dash panel and the seat due to the inertial force during the collision of the vehicle Its purpose is to provide a crash safety device.

1 is a side view schematically showing a problem caused by a collision of a general vehicle;

2 is a partial cutaway side view schematically showing a collision safety device of a vehicle according to the present invention;

3a to 3c are side views sequentially showing the operating state of the present invention,

4 is a plan view taken along the IV of FIG. 3B.

<Explanation of symbols for main parts of drawing>

10: collision detection sensor 20: multi-stage cylinder

30: gunpowder 40: kidney motor

41: key sensor 50: dash panel reinforcement plate

P: Dashboard S: Seat

U: passenger L: (passenger's) bridge

In order to achieve the above object, a collision safety device of a vehicle according to the present invention includes a collision detection sensor for detecting a collision of a vehicle and outputting a signal thereof; A multi-stage cylinder installed in the dash panel and rapidly expanding when the protrusion is pressed against the seat; And cylinder extension means for operating in accordance with the collision signal of the collision detection sensor to extend the multi-stage cylinder.

According to one preferred feature of the present invention, the expanding means is made of gunpowder accommodated in the multi-stage cylinder and exploded according to the collision signal of the collision detection sensor.

According to another preferred feature of the invention, further comprising a key sensor for detecting the insertion of the ignition key to the key box, and an extension motor for extending the multi-stage cylinder at least one step in accordance with the key insertion signal of the key sensor, Upon insertion a portion of the multistage cylinder is stretched to properly enter between the two legs of the occupant.

Accordingly, the present invention, the movement of the dash panel and the seat by the inertial force is suppressed as much as possible when the collision of the vehicle is maintained at a certain distance between the two, in particular it is possible to prevent the lower body injury of the occupant as much as possible to improve safety and reliability of the vehicle It will have a great effect.

Such specific features and other advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

In FIG. 2, the collision safety device of the vehicle according to the present invention detects a collision of the vehicle V and outputs a signal thereof. A cylinder for extending the multi-stage cylinder 20 by pressing the front panel by operating the multi-stage cylinder 20 to maintain a constant distance between the dash panel P and the seat S and the collision signal of the collision detection sensor 10. It consists of an extension means.

The collision detection sensor 10 is installed at an appropriate position in the engine room R so as to detect the collision sensitively, and is connected to the expansion unit through a control unit (not shown) of the vehicle.

The multi-stage cylinder 20 is preferably accommodated inside the dash panel P and installed so as not to be exposed to the room, and at an appropriate angle so that the protruding end may contact the front surface of the cushion C of the seat S during operation. Are inclined downwardly. The multi-stage cylinder 20 is coupled to the first cylinder 22 to be movable relative to the cylinder body 21 fixed to the dash panel P, for example, and movably coupled to the first cylinder 22. It is composed of a four-stage cylinder having a second cylinder 23 and a third cylinder 24 movably coupled to the second cylinder 23, the number, length and diameter of the cylinder is the dash panel (P) And may be appropriately set in consideration of the distance between the sheet S. FIG.

Meanwhile, in order to maintain the safety distance between the dash panel P and the seat S by operating the multi-stage cylinder 20 by collision, the multi-stage cylinder 20 is shown in FIG. 4. It is installed to operate between the two legs (L) of the passenger (U). However, when the multi-stage cylinder 20 in the dash panel P is momentarily elongated when a sudden crash occurs, there is no fear that the occupant U may be injured secondary by the multi-stage cylinder 20.

Accordingly, as shown in FIG. 3B, it is preferable that a part of the multi-stage cylinder 20 enters between two legs L of the occupant U while driving, for example, the first cylinder 22 of the multi-stage cylinder 20. ) Is configured to extend simultaneously with the insertion of the ignition key into the key box and to enter between the two legs (L) of the occupant (U). To this end, the first cylinder 22 of the multi-stage cylinder 20 is made to expand and contract by an expansion motor 40 such as an antenna motor, and the expansion motor 40 detects the presence or absence of the insertion of the ignition key into the key box. It is driven forward or backward by the sensor 41.

In addition, in order to support the multi-stage cylinder 20 to maintain the safety distance between the dash panel (P) and the seat (S) during the collision, the fixed state is very important, preferably the dash panel (P) and the engine room (R) ), A highly rigid dash panel reinforcement plate 50 is provided, and the multi-stage cylinder 20 is installed in the reinforcement plate 50. The dash panel reinforcement plate 50 may be configured in various ways, for example, may be made of a metal material having high elasticity.

Since the expansion means must be able to quickly expand the multi-stage cylinder 20 in the event of a collision, for example, it is installed in the cylinder body 21 of the multi-stage cylinder 20 and explodes according to the collision signal of the collision detection sensor 10. ) Although not shown separately, the extension means may be made of a pneumatic or hydraulic tank that is opened by the collision signal of the collision detection sensor 10 and fills the high-pressure working fluid into the multi-stage cylinder 20.

Next, the operation of the vehicle collision safety device according to the present invention configured as described above will be described with reference to FIG.

3A illustrates a case in which the vehicle V is not driven, and the ignition key is removed from the key box. In this state, since the expansion motor 40 is not driven by the key sensor 41, all of the first to third cylinders 22 to 24 of the multi-stage cylinder 20 are contracted, and the cylinder inside the dash panel P The insertion into the main body 21 does not interfere with the aesthetics of the room as well as the ascent of the occupant U.

When the ignition key is inserted into the key box to drive the vehicle V in such a state, the key sensor 41 detects this and outputs a key insertion signal. Accordingly, as shown in FIG. 3B, the expansion motor ( As the 40 is driven in the forward direction, the first cylinder 22 of the multistage cylinder 20 is extended relative to the cylinder body 21. Then, as shown in FIG. 4, the first cylinder 22 of the multi-stage cylinder 20 enters properly between the two legs L of the occupant U. As shown in FIG. In this case, the second and third cylinders 23 and 24 may be inserted into the first cylinder 22.

Next, when a collision accident occurs during the operation of the vehicle V, the collision detection sensor 10 installed in the engine room (R) detects this and outputs the signal, according to the collision signal multi-stage cylinder (20) Gunpowder 30 in the explosion will explode. Then, the second and third cylinders 23 and 24 inserted into the first cylinder 22 are momentarily extended by the explosive force of the gunpowder 30, and the tip of the third cylinder 24 is extended to the occupant U. Is in close contact with the cushion (C) front surface of the seat (S). Accordingly, the phenomenon in which the seat S is moved forward by the inertial force due to the collision and the rear push of the engine are appropriately suppressed by the multi-stage cylinder 20 interposed therebetween, thereby maintaining a constant between the dash panel P and the seat S. The distance will be maintained.

Therefore, even if the occupant U is leaned forward due to the inertia at the time of collision, it is possible to prevent the lower body injuries as much as possible, and as in the prior art, the occupant's legs are not caught between the seat and the dash panel. Action is possible. When the crash safety device of the present invention is adopted at the same time as the existing seat belt and airbag, it is possible to suppress the injury as a whole, as well as the upper body of the occupant (U).

As described above, according to the present invention, since the movement of the dash panel and the seat due to the inertia force is suppressed as much as possible during the collision of the vehicle, it is possible to maintain a certain safety distance between the two, thereby preventing the occupant's lower body injury to the maximum. Yes, of course, it allows for quick action of emergency rescue.

Therefore, this invention has the outstanding effect which greatly improves the safety, reliability, etc. of vehicle running.

Claims (5)

A collision detection sensor for detecting a collision of the vehicle and outputting a signal thereof; A multi-stage cylinder installed in the dash panel and rapidly expanding when the protrusion is pressed against the seat; And cylinder expansion means for operating the collision signal of the collision detection sensor to expand the multi-stage cylinder. 2. The collision safety device of claim 1, wherein the extension means is a gunpowder accommodated in the multi-stage cylinder and explodes in accordance with a collision signal of the collision detection sensor. The collision safety device of claim 1, further comprising a high rigidity dash panel reinforcement plate installed between the dash panel and the engine room to support the multi-stage cylinder. The collision safety device of any one of claims 1 to 3, wherein the multi-stage cylinder is installed to be accommodated in the dash panel. The multistage cylinder according to claim 4, further comprising: a key sensor for detecting insertion of a ignition key into a key box, and the multistage cylinder according to a key insertion signal of the key sensor so that a part of the multistage cylinder is positioned between two legs of a passenger. Collision safety device for a vehicle, characterized in that it further comprises an extension motor for extending the step.