KR100861398B1 - Lamp shield driving apparatus providing multiple beam patterns, and lamp assembly using the same - Google Patents

Abstract

Provided are a lamp shield driving apparatus providing a plurality of beam patterns and a lamp assembly using the same. The lamp shield driving apparatus providing a plurality of beam patterns according to an embodiment of the present invention includes a first shield and a second shield having an inclined surface forming a cut off pattern at a corner thereof and overlapping the first shield. A shield, a cam profile in contact with the first shield and the second shield to move each shield up and down, including a camshaft and a motor for rotating the camshaft, each having a different cam profile shape, wherein the first shield and the second shield are overlapped. At least one shield is moved up and down in the state to form at least two or more beam patterns.

Projection lamp, shield, class C, class E, class V, high beam

Description

Lamp shield driving apparatus providing multiple beam patterns, and lamp assembly using the same

1 is a schematic view showing the configuration of a headlamp of a projection type.

2A shows a beam irradiation pattern according to class C.

2B shows a beam irradiation pattern according to class V. FIG.

2C shows a beam irradiation pattern according to class E. FIG.

2D shows a beam irradiation pattern according to class W. FIG.

3 is an exploded perspective view showing the configuration of a lamp shield drive device according to an embodiment of the present invention.

4 is a front view of a state in which the shield driving device of FIG. 3 is coupled.

5 is a view for explaining that the first shield and the second shield of the present invention is guided in line contact with the holding portion.

6 is a view showing a holder portion of the lamp shield driving apparatus according to an embodiment of the present invention.

7 is a view illustrating a camshaft of a lamp shield driving apparatus according to an embodiment of the present invention.

8 is a view showing a camshaft driving unit for driving a camshaft according to an embodiment of the present invention.

9A to 9D are diagrams showing positions of respective shields for class V, class C, class E, and upward lighting by the shield driving apparatus according to the exemplary embodiment of the present invention.

10A and 10B are rear and front views of a lamp assembly according to an embodiment of the present invention.

 (Symbol description of main part of drawing)

110: first shield 112: inclined surface

116, 126: cam contacts 118a, 118b, 128a, 128b: projection

120: second shield 130: camshaft

132, 134: cam profile forming surface 140: camshaft drive portion

142: motor direct gear 143: camshaft gear

145: return spring 150: drive unit

160: torsion coil spring 170: holder portion

200: lamp assembly 210: lens

220: housing

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head lamp for a vehicle, and more particularly to a lamp assembly that provides various beam patterns according to the driving environment of a vehicle.

Headlamps, also known as headlamps, are lights that function to shine ahead of the vehicle and require brightness to identify obstacles on the road at a distance of 100m ahead at night. The standard of the head lamp is set differently from country to country, and in particular, the direction of irradiation of the head lamp beam is set differently depending on whether it is a right traffic (left driving) or a left traffic (right driving).

In general, a headlamp is adjusted so that a beam of a left hand drive (LHD) vehicle is irradiated further to the right of the vehicle driving direction about a center line of a road, and a right hand drive (RHD) vehicle Is adjusted so that the beam of the vehicle is irradiated farther to the left of the travel direction. In other words, the beam of the headlamp is adjusted to be irradiated more weakly to the side adjacent to the center line, regardless of whether it is left driving or right. By adjusting the beam irradiation direction of the headlamp, it is regulated to prevent the glare of the driver by reducing the amount of beam irradiated to the driver traveling in the opposite direction.

Conventional vehicle headlamps provide drivers with a fixed lighting pattern, regardless of varying road conditions. Therefore, due to the high-speed driving, which requires a longer viewing distance than the existing road, the surrounding lights are brighter than other roads, and the driving of the city is less dependent on the brightness of the headlamp, and the reflection of rain or snow or wet road When driving in bad weather when the glare increases and the visibility decreases, the driver does not have a proper view to drive safely.

Therefore, there is a need to devise a technology that provides a good view at all times to ensure a safe driving by providing a lighting pattern optimized for a variety of changes in the road situation compared to the existing fixed lighting pattern.

The technical problem to be achieved by the present invention is to enable the driver to secure a view suitable for various road conditions by converting the lighting pattern to an optimal state in accordance with the road conditions continuously changing as the vehicle travels.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the lamp shield driving apparatus according to an embodiment of the present invention includes a first shield (inclined) formed with an inclined surface to form a cut off pattern (corner); A second shield that may overlap with the first shield; A camshaft each having a cam profile having a cam profile different from each other in contact with the first shield and the second shield to move the shield up and down; And a motor for rotating the camshaft, and forms at least two beam patterns as the at least one shield moves up and down while the first shield and the second shield overlap.

In order to achieve the above object, the lamp assembly according to an embodiment of the present invention is a light source, a lamp shield driving device for blocking a portion of the light provided by the light source in a predetermined shield pattern, and the blocked light to aggregate in the front A lamp assembly comprising a lens and a housing for accommodating the light source and the lamp shield driving device, the lamp shield driving device comprising: a first shield having an inclined surface forming a cut off pattern at an edge thereof; A second shield that may overlap with the first shield; A camshaft each having a cam profile having a cam profile different from each other in contact with the first shield and the second shield to move the shield up and down; And a motor that rotates the camshaft, and forms at least two beam patterns as each shield moves up and down while the first shield and the second shield overlap each other.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for describing a lamp shield driving apparatus for providing a plurality of beam patterns and a lamp assembly using the same according to embodiments of the present invention.

1 is a schematic view showing the configuration of a headlamp 10 of the projection type. Such a projection type headlamp collects light in one place, which is advantageous in light distribution than a general clear type, and gives a sporty aesthetic to the front shape of a vehicle.

The light emitted from the light source 11 is reflected by the reflective surface 12 of a predetermined shape (for example, elliptical) and concentrated at one point 16 of the light source 11 in all directions. The concentrated light is refracted by the refraction lens 15 provided at the front side and irradiated substantially in all directions. However, the light emitted upward in the emitted light is reflected on the reflective surface 12 and proceeds downward, and the light emitted downward is reflected in the reflective surface 13 and proceeds upward. By the way, except that the high beam is irradiated, the light emitted downward and traveling upward is blocked by the shield 14 so as not to inconvenience other drivers.

As described above, the projection type headlamp 10 is different from the clear type headlamp since the light reflected from the mirror surface 12 is substantially concentrated at one point 16. Even if the shape around) is slightly different, various beam irradiation patterns can be formed.

2A to 2D are diagrams showing examples of implementing various beam irradiation patterns. 2A shows class C among these. Class C is a beam pattern 21 suitable when the vehicle 20 runs on a country road. Compared with a general low beam, it is a pattern in which the amount of light is improved while securing a view of the opposite lane.

2B shows class V. Class V is a beam pattern suitable when the vehicle 20 travels in an environment where the brightness of the surrounding lights is secured to some extent, such as a city area. In particular, the left / right field of view is wider than that of class C 21, and a field of view that is somewhat shorter than the class C 21 (about 50 to 60 m in front) is secured. However, in order to widen the left / right field of view, it is common to tilt the irradiation direction of the left / right headlamps somewhat outward.

2C shows class E. Class E is a beam pattern suitable when the vehicle 20 is traveling on a highway or on a road where a substantial straight section is maintained. Thus, the class E 23 has a characteristic that the front far field is somewhat longer than the class C 21.

Finally, FIG. 2D shows a class W. FIG. Class W is a beam pattern suitable when the vehicle 20 is driving in rainy weather or on wet roads. Thus, the forward far field is somewhat similar to class E 23, but is characterized by reducing the amount of light, in order to reduce the reflective glare up to about 10-20 m in front.

As shown in Figs. 2A to 2D, the actual vehicle 20 needs to change the beam pattern variably according to various driving environments. In particular, the use of a projection type headlamp is advantageous in the light distribution plane, and it is possible to change various beam patterns simply by changing the shield. However, the conventional beam pattern changing method has a problem in that its configuration is complicated, so that manufacturing cost is high or it is difficult to accurately control a shield pattern for forming a specific beam pattern.

3 is an exploded perspective view illustrating a configuration of a lamp shield driving apparatus according to an embodiment of the present invention, and FIG. 4 is a front view of a state in which the shield driving apparatus of FIG. 3 is coupled.

The lamp shield driving apparatus according to the exemplary embodiment of the present invention may include a first shield 110, a second shield 120, and a driver 150. The driving unit 150 may include a cam shaft 130 and a motor (not shown).

The first shield 110 has a shape as shown in FIGS. 3 and 4. An inclined surface 112 that forms a cut-off pattern together with the second shield 120 is formed at an edge of the first shield 110. A cut-off pattern may be formed on the upper surface 114 of the first shield 110, the inclined surface 112 connected to the surface 114, and the upper surface 124 of the second shield 120 to be described later. . Under the first shield 110, a cam contacting portion 116 may be formed to contact the surface 132 on which the profile of the camshaft 130 is described later. The first shield 110 is moved up and down in accordance with the cam profile by the drive unit 150, preferably by the rotation of the cam shaft 130 to change the rotational movement to linear movement.

At this time, the first shield 110 may be pulled toward the camshaft 130 by the elastic member 160 so that the first shield 110 may be in close contact with the surface 132 on which the camshaft profile is formed.

The projection 118 is formed on the side of the first shield 110 as shown in the figure, which is to prevent the unexpected cut-off pattern is formed due to the flow during the vertical movement of the shield 110, Figure 5 It will be described later with reference.

The second shield 120 has a shape as shown in FIGS. 3 and 4. Like the first shield 110, a cam contact portion 126 is formed below and moves up and down along the cam profile by the rotation of the cam shaft 130. In addition, the elastic member 160 may be in close contact with the surface 134 on which the profile of the camshaft 130 is formed, and the protrusion 128 may be formed on the side surface.

The first shield 110 and the second shield 120 are partially overlapped to form a cut-off pattern. As shown in FIGS. 3 and 4, the grooves 119 are indented on the sides of one of the two shields. The shield is formed on the side of the remaining shield corresponding to the groove of the intaglio 129 is formed so that the two shields (110, 120) may overlap. In the drawing, an intaglio groove 119 is formed in the first shield 110, and an embossment 129 is formed in the second shield 120 to be inserted into the intaglio groove 119 of the first shield 110. . Of course, a shape in which an intaglio groove is formed in the second shield 120 and the first shield 110 is inserted may be considered.

The driver 150 moves the first shield 110 and the second shield 120 up and down. Preferably, as shown in the figure may be configured to include a cam shaft 130 and a motor (not shown) for rotating the cam shaft 130. The camshaft 130 and the camshaft driver 140 will be described in more detail with reference to FIGS. 7 and 8.

7 is a view showing a cam shaft of the lamp shield driving apparatus according to an embodiment of the present invention, Figure 8 is a view showing a cam shaft driving unit including a motor for driving the cam shaft according to an embodiment of the present invention.

As shown, the camshaft 130 has surfaces 132 and 134 having cam profiles formed to contact the first shield 110 and the second shield 120 to move the shields 110 and 120 up and down, respectively. Since the shape of the cam profile is different, the movement of the first shield 110 and the second shield 120 may be different as the cam shaft 130 rotates. The cam shaft 130 may rotate by a motor (not shown).

One end of the cam shaft 130 may include a protrusion 136 formed around the cam shaft 130 as shown in the figure. The cam shaft 130 can no longer rotate by the protrusion blocking portion 172 that prevents the rotation of the protrusion 136. This is for fixing the initial position of the camshaft 13 when it is not initially subjected to rotational force by a motor (not shown). Thus, the rotational position of the camshaft 130 is always in the same position in the initial state.

The cam shaft 130 is preferably made of brass (BSBM). The surfaces 132 and 134 on which the profile of the camshaft 130 is formed and the shields 110 and 120 are frictional due to contact, since brass is a hard material for friction. Camshaft 130 may be made of a material other than brass if the material of the camshaft 130 is resistant to friction.

A motor (not shown) rotates the camshaft 130 by a rotation angle desired by the user. It may be preferably composed of a stepper motor. In general, the step motor has an advantage over the accurate angle control compared to other AC servo motor, DC motor. A stepper motor is a device that converts digital pulses into mechanical axis motion, and pulses are applied by digital sources. According to the number of pulses, the axis of the motor (not shown) rotates at a predetermined angle, and if the pulse interval is appropriately set, the driving method and the speed control are possible. However, in order to implement the technical idea of the present invention, other driving devices such as a servo motor may be used instead of the step motor.

In FIG. 8, a directly connected motor direct gear 142 is formed on a rotating shaft 141 of a motor (not shown), and a cam shaft gear 143 having a predetermined gear ratio with the motor direct gear 142 includes a motor direct gear ( 141) and the gear is connected. Since the camshaft gear 143 is connected to the camshaft 130, the motor direct gear 142 and the camshaft gear 143 rotate as the motor (not shown) rotates so that the camshaft 130 rotates. As shown in FIG. 8, a return spring 145 may be formed on the shaft 144 of the camshaft gear 143.

The return spring 145 may be a torsion coil spring. When the rotational force is not applied to the camshaft gear 143 by a motor (not shown), the camshaft gear 143 may be moved to a predetermined initial position by the elastic force of the return spring 145. ) To rotate. At this time, a protrusion 146 may be formed at one end of the camshaft gear 143. When the camshaft gear 143 is rotated by the return spring 145, the protrusion 146 is formed on the outside. The protrusion 146 is in contact with the branch 147 so that the camshaft gear 143 does not rotate any more. Therefore, when returning by the return spring 145, the camshaft gear 143 can always be located in the same initial position.

The lamp shield driving apparatus according to an exemplary embodiment of the present invention includes an elastic member that pulls the first shield 110 and the second shield 120 into close contact with the surfaces 132 and 134 on which the cam profiles of the cam shaft 130 are formed. 160) may be further included. The elastic member 160 is preferably formed of a torsion coil spring 160 as shown in FIG. The shields 110 and 120 are forced downward by the elastic force of the torsion coil spring 160 to be in close contact with the cam profile surfaces 132 and 134. In addition, the torsion coil spring 160 is in close contact with the cam profile surfaces 132 and 134 and the shields 110 and 120 to prevent the shaking of the shields 110 and 120 when vibration occurs, and the cam profiles 132 and 134. And may serve to correct the correct position of the shield (110, 120). In this case, the temperature of the spring 160 may increase due to the heat generated by the light source 230, and thus the physical properties of the spring 160 may be changed. In the present invention, the lower ends of the shields 110 and 120 that are intensively heated by the light source 230. Spring 160 is formed in the to receive a relatively small amount of heat from the light source 230. Preferably, the material of the torsion coil spring 160 may be formed of a heat resistant steel.

5 is a view for explaining that the first shield and the second shield of the present invention is guided by the line contact with the holder, Figure 6 is a view showing a holder portion of the lamp shield driving apparatus according to an embodiment of the present invention to be.

According to the present invention, the two shields 110 and 120 form a cut-off pattern while moving up and down, and the shields 110 and 120 are not required by the user as they move left and right or back and forth by the flow during the vertical movement. A pattern can be formed. Therefore, there is a need for a method of preventing flow during vertical movement of the shields 110 and 120. In the present invention, as shown in FIG. 5, the guide surface 174 guides the vertical movement of the shields 110 and 120 to be in line contact. It is possible to prevent the flow of the shields 110 and 120 and to reduce the friction area with the guide surface 174. FIG. 5 is a view of the shields 110 and 120 from above, but the shields 110 and 120 make vertical movements in the vertical plane of the drawing. Sides of the shields 110 and 120 are formed with protrusions 118 and 128 having a predetermined radius along the longitudinal direction in which the shields 110 and 120 move vertically. This is better illustrated in FIG. 4. 6, a holder unit 170 may be formed to surround the first shield 110 and the second shield 120 from the side and guide the vertical movement of the shields 110 and 120. The holder portion 170 is formed with a guide surface 174 for guiding the projections 118 and 128 formed on the shields 110 and 120 as shown in FIG. 6. Again, referring to the enlarged view of FIG. 5 showing the projections 118 and 128 of the shields 110 and 120 coupled to the guide surface 174 of the holder portion 170, the radius of the guide surface 174 is It can be seen that it is larger than the radius of the projections 118 and 128. Therefore, the projections 118 and 128 of the shield 110 and 120 and the guide surface 174 are in one line contact along the longitudinal direction of the projections 118 and 128. In this case, preferably, two projections 118a, 118b, 128a, and 128b and two guide surfaces 174 corresponding to the shields 110 and 120 may be formed to prevent the flow of the shields 110 and 120. have. It is a matter of course that the friction between the shield and the guide surface can be reduced by performing line contact instead of surface contact.

Looking at the holder portion 170 of Figure 6, a hook portion 176 for fixing the coil compression spring 160 for close contact with the above-described cam shaft 130 and the shield (110, 120) is formed in the center, one side It can be seen that the guide surfaces 174 for guiding the shields 110 and 120 are formed, respectively. In addition, in order to prevent rotation of the above-described camshaft 130 A protrusion blocking part 172 may be formed to prevent rotation of the protrusion 136 formed on the cam shaft 130. The cam shaft 130 is inserted into the holes 178 on the left and right sides of the holder portion 170.

According to the present invention, as the cam shaft 130 rotates, the two shields 110 and 120 respectively move upward and downward to form a C class, an E class, a V class, and an upward light pattern.

9A to 9D are diagrams showing positions of respective shields for class V, class C, class E, and upward lighting by the shield driving apparatus according to the exemplary embodiment of the present invention.

First, FIG. 9A shows a state of class V. FIG. As the cam shaft 130 rotates, the first shield 110 and the second shield 120 move up and down differently according to different cam profiles. The first shield 110 and the second shield 120 are the same. In the state of being raised to the height, it blocks the amount of light that extends to a long distance and widens the width of the light that extends.

9B shows the appearance of class C. As the cam shaft 130 rotates, each of the shields 110 and 120 moves up and down differently according to different cam profiles. The second shield 120 is lowered as compared to the position of FIG. 9A. Therefore, a cutoff pattern such as Pc in the figure is formed.

9C shows the appearance of class E. FIG. As the cam shaft 130 rotates, each of the shields 110 and 120 moves up and down differently according to different cam profiles. The first shield 110 is lowered as compared to the position of FIG. 9B. In this case, the inclination of the inclined surface 112 in the cut-off pattern is called the KINK inclination. As the inclination of the KINK approaches 90 degrees, the light reaches a far distance. However, in the present invention, as the first shield 110 is lowered as compared to the class C, the width of the inclination line is reduced in the cutoff pattern, but the inclination does not change. Thus, it is impossible to reach light over relatively long distances. Therefore, in the present invention, the shield is blocked from blocking the amount of light that extends to a long distance by lowering the first shield 110 and the second shield 120 little by little while the first shield 110 is lowered. . The cut off pattern for class E is shown as Pe.

9D shows a state in the case of a high beam pattern. As the cam shaft 130 rotates, the shields 110 and 120 move up and down differently according to different cam profiles, respectively, and the first shield 110 and the second shield 120 are both lowered horizontally. Cut-off pattern. Therefore, the amount of light blocked by the shield is the smallest, and thus light can be reached at a far distance.

At this time, the initial state when the cam shaft 130 is not rotated by the motor (not shown) is to set the type with the highest frequency of use of the four cases so that each shield (110, 120) is located according to the cap profile Can be. Typically, a class V is used most frequently in a car that frequently runs downtown, so the initial state can be left in a class V state. In addition, a cam profile may be formed to form a beam pattern of a class C, a class E, and an upward lamp according to the rotation of the cam shaft 130.

10A and 10B are rear and front views of a lamp assembly according to an embodiment of the present invention.

Lens 210 is a refractive lens mounted on the front of the lamp assembly 200, serves to increase the intensity of light generated from the light source 230. A light source 230 is formed behind the lamp assembly 200 to irradiate light toward the lamp shield driving device 100. In this case, the lens 210, the light source 230, and the lamp shield driving device 110 are accommodated in the housing 220.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

According to the lamp shield driving device and the lamp assembly using the same, which provides a plurality of beam patterns of the present invention as described above, according to the various driving environment in which the vehicle travels, the driver adaptively changes the beam pattern of the head lamp, By ensuring a view suitable for various road conditions, safety during vehicle operation can be achieved.

Claims (12)

A first shield having an inclined surface forming a cut off pattern at an edge thereof; A second shield that may overlap with the first shield; A camshaft each having a cam profile having a cam profile different from each other in contact with the first shield and the second shield to move the shield up and down; A motor for rotating the camshaft; And A holder part surrounding side surfaces of the first shield and the second shield and guiding vertical movement of the shield; A protrusion having a predetermined radius is formed on a side of the shield along a longitudinal direction in which the shield moves up and down, and the holder portion is in line contact with the protrusion at a radius larger than the radius of the protrusion corresponding to the protrusion. Grooves are formed, And at least two beam patterns as the at least one shield moves up and down in a state where the first shield and the second shield overlap with each other. The method of claim 1, The overlapping portion of the first shield and the second shield is formed by coupling an embossed portion formed on one side of the other shield to a recessed groove formed on one side of the shield. delete The method of claim 1, Lamp projection drive device, each of the projections and grooves are formed on each side in two shields. The method of claim 1, And the motor is a step motor. The method of claim 1, The camshaft is rotated by the rotation of the camshaft gear geared to the motor direct gear connected to the motor, When the rotational force transmission by the motor is stopped by the return spring formed on the shaft of the camshaft gear, the projection formed around the camshaft gear, and the projection blocking portion which stops the rotation of the camshaft in contact with the projection, And the camshaft gear is returned to a position where the protrusion stopping portion touches. The method of claim 1, And a resilient member for pulling the first shield and the second shield into close contact with a surface on which the cam profile of each of the camshafts is formed. The method of claim 7, wherein And the elastic member is a torsion coil spring. The method of claim 1, And a projection shield formed around the cam shaft and one end of the cam shaft to fix the initial position of the cam shaft by a projection blocking portion which prevents rotation of the cam shaft.  The method of claim 1, And said cut-off pattern consists of two horizontal components having a predetermined step by said first shield and said second shield and an oblique line by said inclined surface. The method of claim 10, wherein the beam pattern is And at least two or more of a C class, an E class, a V class, and a high beam pattern. A light source, a lamp shield driving device for blocking a part of the light provided by the light source in a predetermined shield pattern, a lens for concentrating the blocked light forward, and a housing for receiving the light source and the lamp shield driving device; A lamp assembly, wherein the lamp shield drive device A first shield having an inclined surface forming a cut off pattern at an edge thereof; A second shield that may overlap with the first shield; A camshaft each having a cam profile having a cam profile different from each other in contact with the first shield and the second shield to move the shield up and down; A motor for rotating the camshaft; And A holder part surrounding side surfaces of the first shield and the second shield and guiding vertical movement of the shield; A protrusion having a predetermined radius is formed on a side of the shield along a longitudinal direction in which the shield moves up and down, and the holder portion is in line contact with the protrusion at a radius larger than the radius of the protrusion corresponding to the protrusion. Grooves are formed, And at least two beam patterns as each shield moves up and down in a state where the first shield and the second shield overlap with each other.

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