KR20020040404A - Hood Locking Apparatus for Impact Absorbing of Car - Google Patents

Abstract

PURPOSE: A hood locking device for buffering impact of a vehicle is provided to buffer impact by pressing a hood downward and to minimize damage of a pedestrian. CONSTITUTION: A hood locker for buffering impact of a vehicle comprises a bracket(110) dropped downward in applying impact into a hood(1) by being fixed on a lower portion of the hood; a fixing bar(120) arranged in the middle of the bracket; a locking protrusion formed on an end portion of the fixing bar; a slant circular plate(130) rotating by load of the hood; a locking long groove(132) formed on an upper portion of the slant circular plate; a housing(140) fixed on an upper portion of a striker(2) combined to a latch(4); a bearing(142) combined to a lower portion of the slant circular plate; a rotation preventing pin(150) combined to an insert groove(152) of the slant circular plate to prevent rotation of the slant circular plate; a pin releasing lever(160) withdrawing the rotation preventing pin from the insert groove; an extension spring(170) rotating the pin releasing lever; and an impact sensing lever(180) fixed on the bracket by a hinge.

Description

Hood Locking Apparatus for Impact Absorbing of Car}

The present invention relates to a hood lock device for a vehicle. More particularly, when a body part (particularly, the head) of a pedestrian hits the hood side during a frontal collision of the vehicle, the hood falls down at the same time as the collision. It relates to a shock-absorbing hood lock device of a vehicle that can minimize the impact force transmitted to the pedestrians more securely.

In general, the front side of the vehicle is provided with a hood, which can be rotated by the hinge, it is configured to be locked by the hood lock.

The hood lock is classified into a dovetail type and a fork pin type according to how the lock is engaged.

Both the dovetail type and the fork pin type are equipped with a lock mechanism and a lift mechanism. The lock mechanism first locks the striker on the hood side, and the lift mechanism lifts the hood up 20 to 30 mm to allow hands to be released when the lock is released. Play a role.

The fork pin method is relatively small in size, and has been widely adopted in recent years because of its wide tolerance range and high reliability.

In terms of the design of the hood lock, the hood lock is a part that restrains the hood and the body, and particularly in the case of the rear open hood, the role of the hood lock is largely imposed on the lock for safety during frontal collision. Therefore, the shape, material, and heat treatment should be appropriate in consideration of the impact fracture strength and durability.

On the other hand, one of the most important performances required in the hood is torsional stiffness. Torsional stiffness is evaluated as a large or small amount of deformation when twisted.

If the torsional rigidity of the hood is low, that is, the deformation amount is large, a phenomenon in which a large amount of deformation is largely sag to one side when opened is fixed in the form of fixing only one side of a hood that is commonly used.

The whistle of opening the hood also makes the car feel weak. In order to solve this problem, a technique of deforming an inner plate or attaching a reinforcing plate has been proposed.

While the rigidity of the hood is increased in this way, there is a positive aspect in that the rigidity of the vehicle is improved. On the other hand, when a frontal collision with a pedestrian occurs, a part of the body of the pedestrian (particularly, the head) hits the hood side. There is a problem that gives a great impact to.

In order to solve this problem, recently, pedestrian protection laws for safety of pedestrians, such as mandatory installation of a shock absorber or the like, have been tightened.

1 is a perspective view showing a hood lock of a typical vehicle, Figure 2 is a side view showing a hood lock of a conventional vehicle.

First, as shown in FIG. 1, the striker 2 is fixed to the inner end of the hood 1, and the corresponding radiator support panel 3 has a latch 4 coupled to the striker 2. It is fixed.

However, the conventional hood lock is merely a structure for engaging / disengaging the striker and the latch, and the impact applied to the pedestrian when a part of the pedestrian's body (especially the head) hits the hood side due to a frontal collision with the pedestrian while the vehicle is driving. There is a problem that can not be reduced.

The present invention has been made to solve the above-described problems, when the body part (particularly, the head) of the pedestrian hits the hood side during the frontal collision of the vehicle to be buffered while the hood is pressed downwards at the same time as the collision It is an object of the present invention to provide a shock-absorbing hood lock device for a vehicle that can minimize pedestrian injury in a collision.

1 is a perspective view showing a hood lock device of a typical vehicle.

Figure 2 is a side cross-sectional view showing a hood lock device of a conventional vehicle.

Figure 3 is a side cross-sectional view showing a state before the hood lock device operation of the vehicle according to the present invention.

Figure 4 is a side cross-sectional view showing a state after the hood lock device operation of the vehicle according to the present invention.

※ Explanation of symbols about main part of drawing ※

1: Hood 4: Latch

110: Bracket 120: Fixed bar

130: Slope disc 132: Locking ground

140: housing 150: anti-rotation pin

152: Insertion groove 160: Pin release lever

162: Hinge 170: tension spring

180: Shock detection lever

In order to achieve the above object, the present invention is fixed to the lower side of the hood, when the predetermined impact is applied to the hood, the bracket is sagging down the middle portion; A fixed bar fixed to one side of the bracket; An inclined disc having a locking length groove formed on an upper surface thereof in a circumferential direction such that the end of the fixing bar is locked and rotatably installed by a load of the hood; A housing fixed to an upper side of the striker coupled to the latch and bearing-coupled to the lower side of the inclined disc so that the inclined disc rotates; An anti-rotation pin coupled to an insertion groove formed in the middle of the inclined disc to prevent rotation of the inclined disc; A pin release lever connected to one end of the anti-rotation pin and pivotally coupled to be able to withdraw the anti-rotation pin from the insertion groove; A tension spring that rotates the pin release lever to release the anti-rotation pin; It is hinged to the other side of the bracket and one side is limited to the rotation of the pin release lever and the other side is composed of an impact detection lever that is tightly fixed to the bracket.

Hereinafter, a shock absorbing hood lock device for a vehicle according to the present invention will be described in detail.

Figure 3 is a side cross-sectional view showing a state before the operation of the hood lock device according to the present invention, Figure 4 is a side cross-sectional view showing a state after the operation of the hood lock device according to the present invention.

As shown in Figures 3 and 4, the hood lock device of the present invention is largely fixed to the lower side of the hood (1) and the bracket 110, the middle portion sagging downward when a predetermined impact is applied to the hood (1) And, the fixed bar 120 is fixed to the middle one side of the bracket 110, and the end of the fixed bar 120 is fixed to the inclined disc 130 is rotatably installed by the load of the hood (1) And, the housing 140 is fixed to the upper side of the striker (2) coupled to the latch 4, the anti-rotation pin 150 for preventing the rotation of the inclined disc 130, and the anti-rotation pin 150 It comprises a pin release lever 160 for pulling out, a tension spring 170 for rotating the pin release lever 160, and an impact detection lever 180 hinged to the bracket 110.

Referring to the configuration of the hood lock device according to the present invention in more detail, first, the bracket 110 is fixed to the lower side of the hood 1, the middle portion is downward when a predetermined shock is applied to the hood (1) It is configured to sag.

Fixing bar 120 is fixed to the middle side of the bracket 110, the locking end 122 is formed at the end of the fixing bar 120 is formed.

The inclined disc 130 has a locking long groove 132 is formed to be inclined along the circumferential direction on the upper surface of the inclined disc 130 so that the locking protrusion 122 of the fixing bar 120 can be locked and lowered by the load of the hood 1. It is configured to rotate left and right by pressing.

The housing 140 is fixedly installed on the upper side of the striker 2 coupled to the latch 4, and the bearing 142 is coupled to the lower side of the inclined disc 130 so that the inclined disc 130 can be rotated. .

The anti-rotation pin 150 is coupled to the insertion groove 152 formed in the middle of the inclined disc 130, it is configured to prevent the rotation of the inclined disc 130.

The pin release lever 160 is connected to one end of the anti-rotation pin 150 to withdraw the anti-rotation pin 150 from the insertion groove 152, and also to the bracket 110 not shown in the drawings. The hinge 162 is rotatably coupled.

The tension spring 170 is installed at the end of the tension spring 170 by rotating the pin release lever 160 to withdraw the anti-rotation pin 150.

The shock detection lever 180 is coupled to the hinge 182 on the other side of the bracket 110, one side is limited to the rotation of the pin release lever 160 and the other side is tightly fixed to the bracket 110 by a fixing pin 181 It is.

Referring to the operation of the hood lock device according to the invention configured as described above are as follows.

3 shows the state before the operation of the hood lock device. When a vehicle collides with the pedestrian in this state, when a part of the body of the pedestrian hits the hood 1, the impact force generated at this time presses the hood 1 downward. .

As the impact is applied to a predetermined portion of the hood 1, the impact detection lever 180 is rotated counterclockwise around the hinge 182.

As the impact detection lever 180 is rotated counterclockwise, the contact between the impact detection lever 180 and the pin release lever 160 is released. At this time, the tension spring 170 is pulling the pin release lever 160. The pin release lever 160 is rotated counterclockwise about the hinge 162.

As the pin release lever 160 is rotated, the anti-rotation pin 150 connected to the pin release lever 160 is removed from the insertion groove 152. At this time, the locking protrusion 122 of the fixing bar 120 is inserted into the locking long groove 132 of the inclined disc 130, the inclined disc 130 is pressed down by the load of the hood (1).

Accordingly, the inclined disc 130 is rotated by the pressing of the fixing bar 120, thereby causing the inclined disc 130 to pull the fixing bar 120 downward, so that the bracket 110 sags downward. It becomes.

As a result, when the vehicle collides with the pedestrian, the bracket 110 installed on the lower side of the hood 1 falls downward to be cushioned so that a large shock is not transmitted to the pedestrian.

As described above, in the present invention, when a pedestrian collides with the vehicle due to a car accident, a part of the body (particularly, the head) of the pedestrian hits the hood side, and in this case, the hood is transmitted to the pedestrian while maintaining the rigidity of the hood. By minimizing the impact force to be more effective to protect the pedestrians.

Claims (1)

A bracket 110 fixed to the lower side of the hood 1 and having an intermediate portion sagging downward when a predetermined shock is applied to the hood 1; A fixing bar 120 fixed to one middle side of the bracket 110; An inclined disc 130 having a locking long groove 132 formed on an upper surface thereof in a circumferential direction such that an end of the fixing bar 120 is locked and rotatably installed by a load of the hood 1; A housing 140 fixed to an upper side of the striker 2 coupled to the latch 4 and having a bearing 142 coupled to the lower side of the inclined disc 130 so that the inclined disc 130 is rotated; An anti-rotation pin 150 coupled to an insertion groove 152 formed in the middle of the inclined disc 130 to prevent rotation of the inclined disc 130; A pin release lever 160 connected to one end of the anti-rotation pin 150 and rotatably hinged 162 so as to withdraw the anti-rotation pin 150 from the insertion groove 152; A tension spring (170) for rotating the pin release lever (160) to release the anti-rotation pin (150); The hinge 182 is coupled to the other side of the bracket 110, one side is limited to the rotation of the pin release lever 160 and the other side is characterized by consisting of an impact detection lever 180 that is tightly fixed to the bracket 110 Shock-absorbing hood lock device for cars.