KR20090008919U - Apparatus for moving head lamp unit - Google Patents

Abstract

The present invention is provided with a head lamp of the vehicle and the head lamp unit which can rotate about the front; A head lamp moving part connected to the head lamp part to move the head lamp part; A head lamp driver driving the head lamp movable part according to an electrical signal; A sensing magnetic body disposed at an end of the head lamp movable unit, the sensing magnetic body and

 A sensing unit having a sensing circuit unit having sensing coils spaced apart from each other and sensing an operation of the head lamp movable unit; A storage unit having a preset value for a movable position of the head lamp movable unit corresponding to the rotation of the head lamp unit; And a control unit which is in electrical communication with the sensing unit and controls the driving signal to the old head lamp driving unit in correspondence with the preset value.

Description

Head lamp rotation device {APPARATUS FOR MOVING HEAD LAMP UNIT}

The present invention relates to a head lamp rotating device, and more particularly to a head lamp rotating device of the structure to increase the durability and operating reliability.

Vehicles such as automobiles are required to function beyond various functions as a moving means as various convenient means for allowing a user to provide a more stable and comfortable driving state. Conventional headlamps have a structure that performs only the remote irradiation function of the light through the forward irradiation of the light in the neutral position and the upward light function, but to secure the stability of the vehicle with the demand for the convenience means of the recent cars As a technology for this, a technique of rotating the head lamp of the vehicle in conjunction with the steering angle of the steering wheel of the vehicle has been adopted.

Such a headlamp rotational transmission device must perform an accurate rotational motion in conjunction with the rotation of the steering wheel, and for this purpose, a sensing unit for detecting the rotation of the headlamp is provided. However, the detection unit for detecting the rotation of the headlamp according to the prior art takes a contact variable resistor structure, the position detection error occurs due to wear due to long-term operation, there is a risk of malfunction, there is a significant risk in securing the stability of the vehicle. There was a problem.

The present invention is to solve the above-mentioned problems, it is an object of the present invention to provide a head lamp rotation apparatus that can increase the durability and more accurate position control of the head lamp rotation movement through a more accurate position detection.

The present invention for achieving the above object is a head lamp having a head lamp of the vehicle and rotatable with respect to the front; A head lamp moving part connected to the head lamp part to move the head lamp part; A head lamp driver driving the head lamp movable part according to an electrical signal; A sensing unit having a sensing magnetic body disposed at an end of the head lamp movable unit, and a sensing circuit unit having a sensing coil spaced apart from the sensing magnetic body and sensing the operation of the head lamp movable unit; A storage unit having a preset value for a movable position of the head lamp movable unit corresponding to the rotation of the head lamp unit; And a control unit which is in electrical communication with the sensing unit and controls the driving signal to the old head lamp driving unit in correspondence with the preset value.

In the head lamp rotation device, the head lamp movable portion is connected to the head lamp portion and the head lamp movable shaft which is formed on the outer circumference and the rack structure of the head lamp movable shaft rotatably engaged with the head lamp A movable rotation part may be provided, and the head lamp movable rotation part may be rotatable by the head lamp driving part.

In the headlamp rotating apparatus, the sensing circuit unit includes a sinusoidal AC oscillator for applying sinusoidal alternating current to both ends of the sensing coil, and a comparator for sensing a phase difference between both ends of a sensing resistor connected in series with the sensing coil. It may be provided.

The headlamp rotation apparatus according to the present invention having the configuration as described above has the following effects.

First, the head lamp rotation apparatus according to the present invention, unlike the conventional contact variable resistance method is difficult to detect the precise position by the variable resistance change caused by the wear of the variable resistor when detecting the rotation angle of the head lamp unit, the contactless detection unit It may be provided to prevent or eliminate the possibility of error occurrence due to wear caused by long time use.

Second, the head lamp rotating apparatus according to the present invention, the sensing circuit unit may be provided with a simple structure RL circuit to reduce the manufacturing cost.

1 is a schematic configuration diagram of a head lamp rotating apparatus according to an embodiment of the present invention.

2 and 3 is a schematic cross-sectional view showing an operating state of the head lamp unit of the head lamp rotating apparatus according to an embodiment of the present invention.

Figure 4 is a schematic partial side view of the head lamp moving part of the head lamp rotating apparatus according to an embodiment of the present invention.

5 is a schematic diagram illustrating an example of a sensing circuit unit of a head lamp rotating apparatus according to an embodiment of the present invention.

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

10 ... head lamp pivot 110 ... head lamp compartment

120 headlamp moving part 200 sensing part

210 sensing magnet 220 sensing circuit

300 ... control unit 400 ... head lamp drive unit

500 ... storage

Hereinafter, a headlamp rotating apparatus according to the present invention will be described with reference to the drawings.

1 is a schematic configuration diagram of a head lamp rotation apparatus 10 according to an embodiment of the present invention, and FIGS. 2 and 3 are schematic partial cross-sectional views of a steering driving state of the head lamp rotation apparatus 10. 4, the head lamp rotating apparatus 10 includes a head lamp unit 110, a head lamp moving unit 120, a head lamp driving unit 400, and a sensing unit 200.

The head lamp unit 110 has a head lamp (not shown) of the vehicle and takes a structure capable of rotating about the front of the vehicle. As shown in FIG. 1, the head lamp unit 110 includes a head lamp reflector 111 arranged around a rear side of a head lamp (not shown), and head lamp link units 113, 115, and 117. The link portions 113, 115, and 117 are connected to the head lamp movable portion 120 described below and are operated by the head lamp movable portion 120. The head lamp link portions 113, 115, and 117 include a head lamp link 113, a head lamp link connection 115, and a head lamp link link 117. The head lamp link 113 is one side of the head lamp reflector 111. Connected with Here, the head lamp link 113 has a structure that is integrally formed with the head lamp reflector 111, but may be configured as a separate component, such as a variety of configurations are possible. The lower end of the head lamp link 113 is connected to the head lamp connection link 117, the head lamp link 113 and the head lamp connection link 117 is rotatably connected through the head lamp link connection 115. Although not shown in the present embodiment, the head lamp reflector 111 has a structure that is hinged to be rotatable about a center O on a plane parallel to the ground. Thus, when an external force is applied in the substantially longitudinal direction of the head lamp connection link 117 which is rotatably connected to the head lamp connection link 117, the head lamp connection link 117 also moves together and is connected with the head lamp connection link 117. The head lamp link 113 connected through the head lamp link connection 115 also rotates, and ultimately the head lamp reflector 113 connected with the head lamp link 113 also rotates together.

The head lamp connection link 117 is connected to the head lamp movable part 120 through the head lamp coupling 119. The head lamp coupling 119 may be disposed between the head lamp connection link 117 and the head lamp movable part 120 to reduce the possibility of breakage or malfunction due to shaft fatigue that may occur due to the mismatch between the two axes. An end of the head lamp coupling 119 is provided with a head lamp movable part 120, which includes a head lamp movable shaft 121 and a head lamp movable rotating part 125. A rack structure is formed on the outer circumference of the head lamp movable shaft 121, and the head lamp movable rotating unit 125 has a structure rotatable by the head lamp driving unit 400 to be described below. The head lamp movable rotating unit 125 is a rack. The pinion structure which engages and rotates with the head lamp movable shaft 121 of a structure can be taken.

The head lamp driver 400 drives the head lamp movable part 120, and the head lamp driver 400 may be implemented as a driving device such as an electric motor. The head lamp driver 400 is driven by a drive signal applied from the controller 300, which is mounted on the head lamp driving shaft 410 of the head lamp driver 400, and the head lamp movable rotating part 125 having a pinion structure is mounted. . Accordingly, the head lamp driving shaft 410 of the head lamp driving unit 400 rotates according to the driving signal applied from the control unit 300, and the head lamp movable rotating unit 125 mounted on the head lamp driving shaft 410 also rotates together. The head lamp movable shaft 121, which is operatively engaged with the lamp movable rotating portion 125, is moved in a substantially longitudinal direction of the shaft, and the link of the head lamp link portions 115, 117, 119 is moved in accordance with the axial movement of the head lamp movable shaft 121. By the movement, the head lamp reflector 111 can rotate in a predetermined direction.

The sensing unit 200 includes a sensing magnetic body 210 and a sensing circuit unit 220. The sensing unit 200 is configured to detect an operating state of the head lamp movable shaft 121, and ultimately, a rotation state of the head lamp reflector 111. Detect. The sensing magnetic material 210 is disposed at the end of the head lamp movable part 120, more specifically, at the end of the head lamp movable shaft 121. The sensing magnetic body 210 may change the inductance value of the sensing coil 221 described below. It is preferable to select a material such as ferrite having a high permeability. The sensing magnetic body 210 may have a structure directly connected to the head lamp movable shaft 121, but in this embodiment, the sensing magnetic body 210 is connected to the head lamp movable shaft 121 through the magnetic coupling 123. The sensing circuit unit 220 includes a sensing coil 221 spaced apart from the sensing magnetic body 210. The sensing magnetic body 210 generates a permeability change in the coil depending on whether the sensing magnetic body 210 is close to the sensing coil 221. The inductance value at 221 is changed. An example of the sensing circuit unit 220 is illustrated in FIG. 5, wherein the sensing coil 221 of the sensing circuit unit 220 is directly connected to the sensing resistor 223, and a sine wave for providing sinusoidal alternating current at both ends of the sensing coil 221. AC generator 225 is disposed. In addition, comparators 227 and 229 are provided for comparing the phase difference of sinusoidal alternating currents at both ends of the sense coil 221. Therefore, the head lamp movable connecting portion 125 is rotated according to the rotation of the head lamp driving unit 400, and the head lamp movable shaft 121 is moved by the rack-pinion engagement structure as the head lamp movable connecting portion 125 is rotated. It is movable in the axial direction of the lamp movable shaft 121. At this time, the sensing magnetic body 210 disposed on the end side of the head lamp movable shaft 121 is moved through the sensing coil 221 of the sensing circuit 220 to change the inductance of the sensing coil 221.

When the sine wave AC of the predetermined frequency f is applied to the sense circuit 220 by the sine wave AC oscillator 225, the impedance of the sense coil 221 appears as follows.

In addition, the sensing coil 221 and the sensing resistor 223 connected in series generate the following phase difference.

Here, R represents the resistance value of the sense resistor 223, L represents the inductance of the sense coil 221, and f represents the sinusoidal AC frequency by the sinusoidal AC oscillator 225. That is, in the state in which the sensing coil 221 and the sensing resistor 223 are connected in series and sinusoidal alternating current is applied, the movable motion passing through the sensing coil 221 of the sensing magnetic body 210 is detected by the impedance of the sensing coil 221. This is represented by a change in the phase delay value across the resistor 223.

The sensing circuit unit 220 includes comparators 227 and 229. The comparators 227 and 229 convert the input sinusoidal wave input from the sinusoidal AC oscillator 225 and the delayed phase sinusoids across the sensing resistor 224 into a square wave form to control the control unit ( 300, it is possible to enable more smooth signal recognition.

The storage unit 500 has an inductance value of the sensing coil 221 according to the penetrating position of the sensing magnetic body 210 generated when the sensing magnetic body 210 is located through the sensing coil 221, and thus the sensing resistance 223. The pre-measured phase delay value at both ends of) is stored. Therefore, the amount of delay phase change across the sense resistor according to the change in inductance of the sense coil 221 generated by the position change of the sensing magnetic body 210 according to the driving of the head lamp driver 400, the phase delay value after the change, and the storage The position of the sensing magnetic body 210 may be known through a phase delay value according to the change in the position of the sensing magnetic body 210 that is pre-measured and stored in the unit 500, and thereby the head lamp movable shaft 121 and ultimately the head lamp. The rotation angle of the reflecting plate 113 can be calculated.

The calculation unit (not shown) makes electrical communication with the control unit 300, and calculates the impedance XL from the phase delay values across the sensing resistors according to the control signal of the control unit 300, and thereby the inductance of the sensing coil 221. Calculates the current position of the sensing magnetic body 210 using the inductance and phase delay values pre-measured and stored in the storage unit 500 from the head lamp movable shaft 121 and ultimately the head lamp reflector 113. Calculate the angle of rotation.

Through the structure as described above, the head lamp rotating device 10 according to an embodiment of the present invention is operated. A signal for transmitting the head lamp to the controller 300 is transmitted from the vehicle controller (not shown) to correspond to the steering degree of the steering wheel by the user. Here, although the vehicle control unit and the control unit 300 are implemented as separate components, it may be apparent that the vehicle control unit and the control unit 300 may be formed integrally.

When the head lamp driver 400 is driven according to the control signal of the controller 300, the head lamp movable shaft 121 is operated, and the head lamp connecting link 117 connected to the head lamp movable shaft 121 is operated. When the head lamp connection link 117 is operated, the head lamp link 113 connected to the head lamp connection link 117 and the head lamp reflector 111 connected thereto rotate left and right. A headlamp (not shown), more specifically, a line segment facing forward of the headlamp reflector 111 is disposed on the line O-Vo, and a neutral line passing through the headlamp reflector 111 is a line at a neutral position in a normal state. Is disposed on the Oo-Oo perpendicular to the O-Vo, when the head lamp reflector 111 is rotated to the left and right around the rotation center O by the driving of the head lamp driver 400 through the control unit 300, The line O-Vo, which is the forward-facing line segment of the headlamp reflector 111 in the neutral position, is disposed on the line O-V1 and / or line O-V2 and the neutral line passing through the headlamp reflector 111 is the line Oo. Change from -Oo to lines O1-O1 and / or lines O2-O2. Accordingly, the head lamp reflector 111 rotates at an angle α and β according to the control signal of the controller 300, and accordingly detects a phase change of the RL circuit according to an inductance change caused by the sensing magnetic body 210. 220 is sensed and the detection signal of the sensing circuit unit 220 is transmitted to the control unit 300 and the control unit 300 to control the head lamp driving unit 400 so as to achieve a rotation of the head lamp unit corresponding to the steering degree of the steering wheel. The control unit performs a predetermined control process by transferring to.

The above embodiments are examples for describing the present invention, but the present invention is not limited thereto. That is, the headlamp reflector of the present invention has a structure that rotates left and right, but may be variously modified, such as may further include a structure that rotates up and down.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the utility model registration claims attached.

Claims (3)

A head lamp unit including a head lamp of the vehicle and rotatable about the front side; A head lamp moving part connected to the head lamp part to move the head lamp part; A head lamp driver driving the head lamp movable part according to an electrical signal; A sensing unit having a sensing magnetic body disposed at an end of the head lamp movable unit, and a sensing circuit unit having a sensing coil spaced apart from the sensing magnetic body and sensing the operation of the head lamp movable unit; A storage unit having a preset value for a movable position of the head lamp movable unit corresponding to the rotation of the head lamp unit; And a control unit which is in electrical communication with the sensing unit and controls to apply a driving signal to the old head lamp driving unit in correspondence with the preset value. The method of claim 1, The head lamp movable unit includes a head lamp movable shaft connected to the head lamp unit and having a rack structure formed on an outer circumference thereof, and a head lamp movable rotating unit rotatably engaged with the rack structure of the head lamp movable shaft, And the head lamp movable rotating part is rotatable by the head lamp driving part. The method of claim 1, The sensing circuit unit includes a sinusoidal alternating current oscillator for applying sinusoidal alternating current to both ends of the sensing coil, and a comparator for sensing a phase difference between both ends of a sensing resistor connected in series with the sensing coil. Device.