KR20040050981A - Device for unlocking the hood lactch lever of car - Google Patents

Abstract

PURPOSE: A device for unlocking a hood latch of a vehicle is provided to open a hood, without putting one's hand in an engine room and operating a hood lever, by operating a hood switch, sensing the approaching state of the human body, and automatically unlocking the hood lever. CONSTITUTION: A hood latch device comprises a support base forming a guide groove; a latch primarily constraining a striker; a pawl locking the latch; and a safety hook secondarily constraining the striker released from the latch. A device for unlocking a hood latch includes a link member(36) connected to a lever formed to the lower end of the safety hook; a solenoid(34) moving the link member; a control part(32) outputting an operation signal to the solenoid if the approaching state of the human body is detected; and an infrared sensor(30) detecting the approach of the human body and inputting the corresponding detection signal to the control part.

Description

Device for unlocking the hood lactch lever of car}

The present invention operates the hood switch installed inside the vehicle when the vehicle hood is opened and moves to the front of the vehicle to detect the access state of the human body and automatically unlocks the hood by inserting a hand into the engine room to find the hood. A hood latch unlocking device for a vehicle that does not need to be operated.

In general, the car is equipped with a hood that blocks the engine noise while protecting the engine room. The hood is fixed to the cowl top outer through a hinge, and has a structure to release the locking of the hood by pulling the wire according to the operation of the button or lever (not shown) installed in the vehicle. In particular, the conventional hood locking structure has a structure in which the striker installed at the front end of the hood is double-locked by the latch and the safety hook. Therefore, to release the locked hood, the primary restraint of the striker by the latch is released first, and then the The hood must not be opened until the secondary speed is released.

The release of the primary restraint by the latch is performed by operation of a button or a lever installed in the vehicle, but the release of the secondary restraint by the safety hook causes the occupant to put his hand into the hood and rotate the handle of the safety hook. It is done by manual operation. As described above, the hood has a double locking structure to prevent the hood from being suddenly opened due to the driving wind while driving in a state where the restraint by the latch is released.

A conventional hood latch apparatus will be described in detail with reference to FIGS. 1 to 3.

1 shows a state in which the hood 10 is constrained in duplicate by the latch 14 and the safety hook 21. A striker 11 is installed at the distal end of the hood 10, and a support base 12 is installed at a vehicle body corresponding to the position where the striker 11 is installed, and the striker 11 is disposed above the support base 12. ) Is provided with a guide groove 13 to enter.

In addition, the support base 12 is installed via the latch spring 17 so that the latch 14 can be rotated, and the front hook of the latch 14 is formed with a hook 15 inclined to the lower end and the front lower side. The support jaw 16 is formed so that a constant groove is provided between the hook 15. In addition, the striker 11 is positioned in the groove provided between the hook 15 and the support jaw 162 and is restrained by the hook 15.

The pawl 18 is rotatably installed on the front surface of the support base 12 via the pawl spring 20, and the pawl 18 contacts the distal end of the latch support jaw 16 to lift the latch 14. Locking prevents the latch 14 from being rotated by the restoring force of the latch spring 17. In addition, the pawl 18 is connected to a wire 19 which is pulled in response to the manipulation of a button or a lever installed in the driver's seat.

On the other hand, the rear surface of the support base 12 is installed by the hook spring 23 so that the safety hook 21 is rotatable, the hook 22 is inclined to the upper end of the safety hook 21 is formed The lever 24 is provided in the lower end.

2 shows a state in which the primary restraint is released from the striker 11 and the latch 14 in the hood latch device configured as described above. That is, when the driver pulls the wire 19 by operating a button or a lever installed in the driver's seat, the pawl 18 is pivoted backward while tensioning the pole spring 20 so that the latch 14 by the pawl 18. Is unlocked. As a result, the latch 14 is rotated by the restoring force of the latch spring 17, and the striker 11, which is restrained by the hook 15 of the latch 14, is opened to be lifted up by the support jaw 16. Is lifted. However, since the striker 11 is secondarily bound by the hook 22 of the safety hook 21, the hood 10 is not completely opened.

3 shows a state in which the striker 11 is completely opened by the secondary restraint released from the safety hook 21. The driver operates the button or the lever in the vehicle to release the primary restraint of the striker 11 by the latch 14 and arrives at the front of the hood of the vehicle. Rotate the lever 24 installed at the bottom. Since the safety hook 21 is hinged to the support base 12, when the lever 24 is rotated, the upper end of the safety hook 21 rotates together, so that the hook 22 formed at the tip of the safety hook 21 comes off and the striker 11 is removed. ) Is released. Thereafter, the hood 10 is fully opened by the driver manually lifting the hood 10. After opening, the driver can do the necessary work after fixing the hood 10.

As described above, in order to release the safety hook in the related art, the driver has to manually rotate the safety hook by hand into the hood. Therefore, there is a discomfort to find by looking at the lever in the invisible position by hand, there was a discomfort such as dirty dust or oil on the hand for simple maintenance or confirmation.

The present invention is to solve the above problems, an object of the present invention is to operate the hood switch installed inside the vehicle when opening the vehicle hood and move to the front of the vehicle to detect the human body approach state automatically detects the hood The present invention provides a hood latch unlocking device for a vehicle that does not need to be put into the engine room by unlocking and finding and operating a hood dredger.

It is another object of the present invention to provide a hood latch unlocking device for a vehicle that does not need to dirty dirt or oil on the hands during simple maintenance or confirmation by automatically releasing the secondary restraint state of the hood according to human approach.

1 is a cross-sectional view of a fixed state of the conventional hood latch device,

Figure 2 is a cross-sectional view of the primary latch release state of the hood latch device of Figure 1,

3 is a cross-sectional view of the secondary latch release state of the hood latch device of FIG. 1;

4 is a block diagram of a lock release device according to the present invention;

5 is a connection state of the solenoid and the link member and the lever according to the present invention.

※ Explanation of symbols about main part of drawing ※

10: Hood 11: Striker

12: support base 13: guide groove

14: latch 15: hook

16: support jaw 17: latch spring

18: Paul 19: wire

20: Fall spring 21: Safety hook

22: hook 23: hook spring

24: lever 30: infrared sensor

32: control unit 34: solenoid

36: link member 38: wire detection switch

The hood latch unlocking apparatus for a vehicle of the present invention for achieving the above object includes a support base formed with a guide groove into which a striker enters and fixed to a vehicle body, a latch installed on the support base to first restrain the striker; A hood latch device comprising a pawl mounted on the support base to lock the latch and a safety hook mounted on the support base to restrain a striker released from the latch, wherein the lever is formed at a lower end of the safety hook. And a link member connected to the control unit, a solenoid for moving the link member, a control unit outputting an operation signal to the solenoid when a human body approaching state is detected, and detecting a human body approaching and corresponding detection signal to the control unit. It characterized in that it comprises an infrared sensor for input.

Hereinafter, with reference to the accompanying drawings, a hood latch unlocking device of a vehicle of the present invention will be described in detail.

The present invention can facilitate the unlocking operation consisting of two steps to open the hood of the conventional vehicle, the driver releases the primary restraint (restrained by the latch) of the hood using a button or a lever in the car In the state, by automatically releasing the secondary restraint (restrained by the safety hook) state provides a convenient function to unlock the hood without compromising the conventional safety function.

Figure 4 is a block diagram of a hood latch unlocking device of a vehicle according to the present invention.

The unlocking device includes an infrared sensor 30 which detects heat of a human body approaching the vehicle and outputs a signal corresponding thereto, and a controller 32 which receives a detection signal from the infrared sensor 30 and outputs a unlocking signal. ), A solenoid 34 operated according to the unlocking signal output from the controller 32 to generate a strong magnetic force, one end connected to the solenoid 34, and the other end connected to the lever 24. Link member 36 is included.

The infrared sensor 30 is installed at a predetermined position of the vehicle, and when a driver or a mechanic approaches to open the hood, the infrared sensor 30 detects heat of the human body according to the approach. When heat is detected, a corresponding electrical signal is generated and output. The output signal is input to the control unit 32.

The controller 32 may be a one-chip microcomputer or an ECU (not shown) of a vehicle. The controller 32 outputs a control signal for releasing the secondary restraint of the hood when a signal is input from the infrared sensor 30.

The output signal is input to the solenoid 34 for generating magnetic force. The solenoid 34 is supplied with power by a control signal to generate a magnetic force, and the rod installed therein moves by the magnetic force.

One end of the link member 36 is connected to the rod of the solenoid 34. The link member 36 is for releasing the secondary restraint of the hood by rotating the safety hook 21 in a state where the primary restraint is released. The other end of the link member 36 is located at the lever 24 located at the end of the safety hook 21. Is connected. The lever 24 is in the same position in the hood lock and primary restraint states, as shown in FIGS. The connection state of the link member 26 and the lever 24 is shown in FIG.

When the link member 36 connected to the lever 24 is pulled by the magnetic force of the solenoid 34, the lever 24 is rotated about the rotating shaft as conventionally pulled by hand, and thus, as shown in FIG. As the lever 24 rotates in the state, the secondary restraint of the striker 11 is released. The signal output from the controller 32 lasts for several seconds and then stops.

After the secondary restraint is released, power is not supplied to the solenoid 24 so that no force is transmitted to the link member 36. However, since the rod of the solenoid 34 is free to move inside the solenoid, there is no problem for the lever 24 to return to its original position. The lever 24 is returned to its original position by the hook spring 23.

When the secondary restraint of the hood 10 is released as described above, the driver or the mechanic has the convenience of not having to find the lever 24 by putting his hand into the hood.

The present invention also includes a wire detection switch 38 for setting the primary restraint release state to prevent the body from being actuated every time the human body approaches the infrared sensor 30 while the primary restraint of the hood is not released. do. The wire detection switch 38 is configured using a micro switch or the like. When the driver releases the primary latch of the hood latch device by using a button or a lever and then presses the wire detection switch 38, a signal is input to the control unit 32 to operate the setting state.

Of course, even if the wire detection switch 38 is not provided, the secondary restraint is not released in the state where the primary restraint is not released, but unnecessary operation of the solenoid 34 for the second restraint according to a detection signal according to the approach of the human body is required. In order to prevent the state, it is preferable to include a wire detection switch 38.

The wire detection switch 38 may be installed adjacent to the hood restraint release button or lever, or may be installed adjacent to the wire 19 to detect a moving state of the wire 19 as shown in FIG. 5.

The control unit 32 detects a signal input from the infrared sensor 30 when the primary restraining signal is input from the wire detection switch 38 and controls the solenoid 34 to release the secondary restraint. Prevents secondary restraint from being released without vehicle restraint.

According to the present invention, when the hood is opened, the hood switch installed inside the vehicle is operated and moved to the front of the vehicle to detect the movement of the human body and automatically unlocks the hood by inserting the hand into the engine room. There is no need to find and operate it, and there is no need to get dirty dust or oil on the hands during simple maintenance or checking.

Claims (3)

A support base 12 having a guide groove 13 through which the striker 11 enters, and fixed to the vehicle body, a latch 14 installed at the support base 12 to restrain the striker 11 firstly; And secondly restrain the pawl 18 installed on the support base 12 to lock the latch 14 and the striker 11 provided on the support base 12 and released from the latch 14. In the hood latch device composed of a safety hook 21, The link member 36 connected to the lever 24 formed at the lower end of the safety hook 21, the solenoid 34 for moving the link member 36, and the solenoid when the approach state of the human body is detected. 34. The hood latch of the vehicle, comprising a control unit 32 for outputting an operation signal to the control unit 32, and an infrared sensor 30 for detecting an approach of a human body and inputting a corresponding detection signal to the control unit 32. Unlocking device. The method of claim 1, And a wire detection switch (38) for setting a primary restraint state of the vehicle to the control unit (32). The method of claim 2, The wire detection switch 38 is installed adjacent to the side of the wire 19 to detect the movement of the wire 19, or is installed adjacent to the wire operation button or lever of the vehicle and the driver is in a primary restraint state. Hood latch unlocking device for a vehicle, characterized in that for setting manually.