KR20080068540A - Headlight for vehicles - Google Patents

Abstract

A head light for a vehicle is provided to maintain visibility of a far-away position by suppressing a glaring effect due to vehicles traveling in an opposite direction. A reflector(3) reflects the light from a light source(2). A projection lens(4) projects the reflected light in front of a vehicle. A shade(5) cuts off a portion of the reflected light from the reflector to the projection lens and passes the rest of reflected light to the projection lens, such that a light emitting pattern with a cutoff line is formed. An edge is installed on the shade and forms the cutoff line of the light emitting pattern. The edge includes first and second edges. The first edge is arranged on or near a focal point of the projection lens. The second edge is closer to the projection lens than the first edge. A shielding portion for decreasing an intensity of a predetermined portion of the light emitting pattern is formed on the second edge.

Description

Headlights for Vehicles {HEADLIGHT FOR VEHICLES}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a projector headlight for a projector type that irradiates the front of a vehicle with a light distribution pattern having a cutoff line, for example, a light distribution pattern for crossing.

BACKGROUND ART Vehicle headlamps of a projector type that irradiate a front of a vehicle with a light distribution pattern having a cutoff line have been conventionally known (see, for example, Patent Document 1). Hereinafter, a conventional headlamp for a vehicle will be described. Conventional vehicle headlights have a light source, a movable shade and a sub-fixed shade.

Hereinafter, the operation of the conventional headlamp for a vehicle will be described. Conventional vehicle headlights can provide a light distribution pattern for intersection when the light source is turned on when the movable shade is switched to the low beam position. In addition, when the movable shade is switched to the motorway beam attitude, a light distribution pattern for the motorway can be obtained. At this time, since the sub-fixed shade shields a part of the light from the light source, the illuminance (luminance, light quantity) of a predetermined point of the light distribution pattern for the motorway is adjusted.

[0003] However, the conventional headlamps for a vehicle are to adjust the illuminance of a predetermined point of a light distribution pattern for a motorway by shielding a part of the light from the light source by a sub fixed shade positioned from the movable shade to the light source side. To this end, a conventional vehicle headlight has a cutoff line of a part of the cutoff line of the motor light distribution pattern formed by the edge of the movable shade, which is shielded by the sub fixed shade, becomes obscured, or a sub fixed shade of the motor light distribution pattern. The light of the portion to be shielded is greatly lost.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2005-93182

The problem to be solved by the present invention is that in the conventional vehicle headlight, the part of the cutoff line of the light distribution pattern that is shielded by the sub fixed shade becomes obscure or the light of the part of the light distribution pattern that is shielded by the sub fixed shade largely drops out. Is in.

According to the present invention (invention according to claim 1), the shade is provided with an edge forming a cutoff line of a light distribution pattern, and the edge is formed above the first edge and the first edge located at or near the focal point of the projection lens. It has a 2nd edge located in the projection lens side, The 2nd edge is provided with the shielding part which reduces the intensity | luminance (illuminance, light quantity) of a predetermined part of a light distribution pattern.

In addition, the present invention (invention according to claim 2) converts the pose of the shade into a first posture in which the light distribution pattern having a cutoff line is obtained and a second posture in which the reflected light from the reflector is not cut off in the shade and a traveling light distribution pattern is obtained. It is characterized by including a switching means to.

The vehicle headlamp of the present invention (invention according to claim 1) can obtain a first light distribution pattern having a clear cutoff line by a first edge located at or near the focal point of the projection lens, and furthermore than the first edge. A second light distribution pattern having a cutoff line that is not clearer than the cutoff line of the first light distribution pattern can be obtained by the second edge located on the side, and further, the predetermined portion of the second light distribution pattern can be obtained by the shielding portion of the second edge. The light of the part can be eliminated. Further, the vehicle headlamp of the present invention (invention according to claim 1) has a light distribution pattern in which a first light distribution pattern and a second light distribution pattern are synthesized, that is, a clear cutoff line by the first light distribution pattern is maintained while the second light distribution pattern is maintained. It is possible to obtain a light distribution pattern in which the brightness of a predetermined portion is reduced. As a result, the vehicle headlight of the present invention (invention according to claim 1) has a predetermined portion of which the light intensity of the light distribution pattern is reduced to the opposite lane side, and the glare of the light difference of the light distribution pattern with the clear cutoff line is prevented. It can prevent, and can maintain visibility of the far side of a driving lane side, and can contribute to traffic safety.

Furthermore, the vehicle headlamp of the present invention (invention according to claim 1) is to reduce the brightness of a predetermined portion of the light distribution pattern by the shielding portion of the second edge of the shade rather than the reflecting surface of the reflector. As a result, the vehicle headlight of the present invention (invention according to claim 1) controls the fine intensity of the light distribution pattern by the shade originally in every three specifications of Japan, Europe, and North America, so that the reflector is common with Japan, Europe, and North America. The manufacturing cost can be made low.

In addition, when the vehicle headlight of the present invention (invention according to claim 2) switches the shade posture to the first posture by the switching means, a light distribution pattern in which the brightness of a predetermined portion is reduced while maintaining a clear cutoff line can be obtained. In addition, when the posture of the shade is switched to the second posture by the switching means, the light distribution pattern for traveling can be obtained without the reflected light from the reflector being cut off to the shade. As a result, the vehicle headlamp of the present invention (invention according to claim 2) can reduce the brightness of a predetermined portion of the light distribution pattern having a cutoff line, and can maintain the brightness of the predetermined portion of the traveling light distribution pattern at a predetermined value. have. As described above, the vehicle headlamp of the present invention (invention according to claim 2) can easily and reliably obtain a light distribution pattern and a light distribution pattern of a cutoff line having opposite requirements.

Hereinafter, with reference to the accompanying drawings, an embodiment of a headlamp for a vehicle according to the present invention will be described in detail. In addition, this invention is not limited by this Example. In the figure, reference numeral "VU-VD" denotes a vertical axis above and below and a vertical line above and below the screen. The symbol "HL-HR" represents horizontal lines on the left and right of the screen. In addition, in the present specification and claims, "up", "down", "front", "back", "left" and "right" refer to the vehicle when the vehicle headlight according to the present invention is equipped with a vehicle (car). "Up", "down", "front", "back", "left", "right". 5A is a cross-sectional view taken along the line VA-VA in FIG. 4, and FIG. 5B is a cross-sectional view taken along the line VB-VB in FIG. 4.

<Example>

Hereinafter, the configuration of the headlamp for a vehicle according to the present embodiment will be described. The headlamp for a vehicle according to the present embodiment is used for traffic on the left side of Japan. The vehicle headlight used for the European left-hand traffic has a configuration substantially the same as the vehicle headlight according to the present embodiment. In addition, the vehicle headlight used for the right traffic in Europe and the right traffic in North America is composed of a configuration in which the vehicle headlight and the left and right are approximately interchanged with each other according to the present embodiment.

In Fig. 1, reference numeral 1 denotes a headlamp for a vehicle according to the present embodiment. The headlamps for vehicles are, for example, headlamps of a projector type, which are respectively mounted on the left and right sides of the front part of a vehicle (vehicle). In addition, as shown in FIG. 1, the vehicle headlamp 1 includes a light source 2, a reflector 3, a projection lens (condensing lens, a convex lens) 4, a shade 5, and a switch. Spring member 6 and drive unit 7 as a means, frame member 8, stopper 9, lamp housing (not shown), lamp lens not shown (for example, transparent outer lens, etc.) It is to be provided.

The light source 2, the reflector 3, the projection lens 4, the shade 5, the spring member 6, the drive unit 7, the frame member 8, and the stopper 9 ) Constitutes a lamp unit. The lamp unit is arranged, for example, through an optical axis adjusting mechanism (not shown) in a lamp compartment (not shown) partitioned by the lamp housing and the lamp lens.

The light source 2 uses a discharge lamp (not shown) in this example. The discharge lamp is a high-brightness discharge lamp (HID), such as a high-pressure metal vapor discharge, such as a so-called metal halide lamp. The light source 2 is detachably attached to the reflector 3 via a socket mechanism 10. In addition to the discharge lamp, the light source 2 may be a semiconductor light source such as a halogen bulb, an incandescent bulb, or an LED. The light source 2 has a light emitting portion 11.

The reflector 3 reflects the light L1 and L2 emitted from the light source 2 toward the projection lens 4 side. The reflector 3 is fixed to the frame member 8. The reflector 3 has a hollow concave shape in which the front side (the irradiation direction side of the light of the vehicle headlamp 1) is opened and the rear side is blocked. A circular through hole 12 for inserting the light source 2 is provided at the center of the blockage portion at the rear side of the reflector 3.

The inner surface of the reflector 3 is subjected to aluminum vapor deposition, silver coating, or the like, and the reflecting surface 13 is formed. The reflecting surface 13 of the reflector 3 is an ellipse or a reflecting surface based on an ellipse, for example, a reflecting surface such as a rotating ellipsoid or an ellipse-based free curved surface (NURBS curved surface). And a horizontal cross section (not shown) forming a parabolic surface or a reflective parabolic surface). To this end, the reflecting surface 13 of the reflector 3 has a first focal point F1, a second focal point (focal on a horizontal cross section) F2 and an optical axis Z-Z, respectively. The free surface (NURBS surface) of the reflective surface 13 of the reflector 3 is a free surface of NURBS (Non-Uniform Rational) described in "Mathematical Elements for Computer Graphics" (Devid F. Rogers, J Alan Adams). B-Spline Surface). The first focal point F1 of the reflecting surface 13 of the reflector 3 is located at or near the light emitting part 11 of the light source 2.

The projection lens 4 projects the reflected light L3, L4 from the reflecting surface 13 of the reflector 3 in front of the vehicle. The projection lens 4 is a convex lens of an aspherical lens. The front side of the projection lens 4 forms a convex aspherical surface, while the rear side of the projection lens 4 forms a flat aspheric surface. The projection lens 4 is fixed to the frame member 8. The projection lens 4 has a lens focal point (the meridian image plane which is the focal plane on the water space side) F3 and the optical axes Z1-Z1. The focal point F3 of the projection lens 4 is located at or near the second focal point F2 of the reflective surface 13. The optical axes Z1-Z1 of the projection lens 4 and the optical axes Z-Z of the reflective surface 13 coincide or substantially coincide with each other. The optical axes Z1-Z1 of the projection lens 4 and the optical axes Z-Z of the reflective surface 13 may be shifted left and right.

The shade 5 includes a plurality of light distribution patterns, for example, a light distribution pattern for intersecting the reflected light L3 and L4 directed from the reflecting surface 13 of the reflector 3 to the projection lens 4. LP) and the light distribution pattern HP shown in FIG. 9 are switched to a plurality of beams obtained, that is, a low beam and a high beam. The shade 5 is composed of a plate structure having a low manufacturing cost (in this example, a thin plate structure of a flat plate capable of reflecting light such as stainless steel or SUS (spring steel sheet)).

As shown in FIGS. 1 to 5, the shade 5 is vertically elongated with the first shade portion 14 positioned on the rear side (the light source 2 side), and similarly shortly vertically on the front side (the projection lens). It consists of the 2nd shade part 15 located in the (4) side), and the horizontal attachment part 16. As shown in FIG. The first shade 14 and the second shade 15 are formed of separate plate members, and both left and right ends of the first shade 14 and left and right ends of the second shade 15 are formed. It is fixed by fixing means (caulking, rivet fixing, welding, adhesion, etc.). The first shade unit 14 and the second shade unit 15 convert the reflected light L3 and L4 into the low beam and the high beam.

The first shade portion 14 and the second shade portion 15 have a central portion protruding toward the light source 2 along the focal point F3 of the projection lens 4 when viewed from above, and both left and right ends thereof are the projection lens. (4) It forms the curved shape which protruded to the side. The shade 5 has a two-plate structure consisting of the first shade portion 14 and the second shade portion 15 so as to erase the color (eg, blue) generated in the light distribution patterns LP and HP. have.

The first edge 17 is provided at the upper edge of the first shade portion 14. In addition, a second edge 18 is provided at the upper edge of the second shade 15. The first edge 17 is located at or near the focal point F3 of the projection lens 4. The second edge 18 is located closer to the projection lens 4 than the first edge 17. The first edge 17 and the second edge 18 each consist of an upper horizontal edge on the left side, a lower horizontal edge on the right side, and an oblique edge at the center. An upper horizontal edge forms a lower horizontal cutoff line CL on the opposite lane side of the crossing light distribution pattern LP, and a lower horizontal edge defines an upper horizontal cutoff line on the travel lane side of the crossing light distribution pattern LP. CL), and the inclined edge forms the inclined cutoff line CL of the light distribution pattern LP for the crossing.

When the first shade portion 14 and the second shade portion 15 of the shade 5 are switched to the first posture, the first shade portion 14 and the second shade portion 15 ) Cuts off a part of the reflected light (L3, L4) from the reflecting surface 13 of the reflector 3 toward the projection lens (4) and the remaining reflected light (L3, L4) to the projection lens (4) side The light distribution pattern LP having the cutoff line CL is formed to pass through. In this case, the first edge 17 of the first shade part 14 and the second edge 18 of the second shade part 15 may be formed in the cutoff line of the cross-distribution light distribution pattern LP. CL).

The spring member 6 and the drive unit 7 are provided in a plurality of postures in which the low beam and the high beam are obtained between the upper posture and the lower posture, that is, the low beam of the first posture. It is to switch to the high beam position of the posture and the second posture. The low beam posture is an upward posture (position) shown in FIG. 1, and the high beam posture is a downward posture (position) located below the low beam posture shown in FIG.

The spring member 6 has a thin plate structure having elasticity such as stainless steel or SUS (spring steel plate). In addition, the spring member 6 has a dome structure as shown in FIGS. 1 to 3 and 5. The shade 5 and the spring member 6 form an integral structure. That is, the attachment part 16 of the shade 5 is integrally provided with the substantially center part of the upper horizontal part of the spring member 6. In addition, the shade 5 and the spring member 6 may be separately manufactured and then fixed integrally.

The spring member 6 is fixed to the frame member 8. That is, both ends of the fixing portion 19 of the lower horizontal portion of the spring member 6 are fixed to the frame member 8 by fixing the screws 20. The spring member 6 of the structure integral with the shade 5 is fixed to the frame member 8, so that the spring force of the spring member 6 acts in an upward direction of the shade 5. It coincides with or approximately coincides with the direction switched between the first posture (low beam posture) and the second downward posture (high beam posture).

The drive unit 7 is composed of a solenoid. The solenoid 7 is accommodated in the space of the spring member 6, as shown in FIG. 1, and is fixed to the frame member 8 through the fixing part 17 of the spring member 6. have. The tip of the retraction rod 21 of the solenoid 7 is attached to the shade 5 and the attachment portion 16 of the spring member 6. As shown in FIG. 1, the direction in which the retracting rod 21 of the solenoid 7 moves forward and backward corresponds to the direction of action of the spring force of the spring member 6 and the switching direction of the posture of the shade 5. Or approximately matches. The direction of action of the spring force of the spring member 6 and the switching direction of the posture of the shade 5 and the direction of retraction of the retracting rod 21 of the solenoid 7 are in the vertical and vertical directions VU-VD.

The stopper 9 is fixed to the frame member 8. As shown in FIG. 1, the stopper 9 is elastically abutted by the attachment portion 16 of the shade 5 when the solenoid 7 is not driven. It is to brake the posture.

A shielding portion 22 is provided on the inclined edge side of the upper horizontal edge of the second edge 18 to reduce the light intensity of a predetermined portion of the cross-distribution light distribution pattern LP. The shield 22 consists of a small rectangular convex projecting upward from the second edge 18. In addition to the above-described small rectangular convex portion, the shielding portion 22 may be, for example, triangular, polygonal, circular or elliptical. A predetermined portion of the crossing light distribution pattern LP is a cutoff line CL on or near the opposing lane side, for example, a point A 0.88 ° downward and 3.5 ° right as shown in FIG. 8. )to be.

An approximately M-shaped notch 23 is provided in the center of the lower edge of the second shade portion 15. Thereby, the overhead sign light distribution pattern (not shown) by which brightness was controlled above the said light distribution pattern LP for crossing is obtained. In addition, the distance between the first shade portion 14 and the second shade portion 15 of the shade 5 has a wide central portion and narrow left and right ends. Accordingly, the visibility difference can be improved by blurring the contrast difference between the cutoff lines CL of the left and right ends of the cross-distribution light distribution pattern LP.

The vehicle headlamp 1 according to the present embodiment has the above configuration, and the operation thereof will be described below.

First, the light source 2 is turned on. Then, light L1 and L2 are radiated | emitted from the light emission part 11 of this light source 2. As shown in FIG. These lights L1 and L2 are reflected from the reflecting surface 13 of the reflector 3 toward the shade 5 and the projection lens 4 side. That is, the light L1 is reflected by the reflecting surface 13 below the reflector 3. In addition, the light L2 is reflected by the reflecting surface 13 on the upper side of the reflector 3.

At this time, when the solenoid 7 is not driven, that is, in a non-energized state, the retracting rod 21 of the solenoid 7 is advanced by the spring force of the spring member 6, and the shade 5 is biased upward. The attachment portion 16 of the shade 5 is in elastic contact with the stopper 9. As a result, the shade 5 is restrained and is in the low beam attitude (first attitude) shown in FIG.

When the shade 5 is in the low beam attitude shown in FIG. 1, a part of the reflected light L3 and L4 from the reflecting surface 13 of the reflector 3 is the first shade portion 14 of the shade 5. And the second shade 15. On the other hand, the remaining reflected light (L3, L4) proceeds to the projection lens 4 side, and is projected (radiated, irradiated) in front of the vehicle as the cross-distribution light distribution pattern LP shown in Fig. 8 via the projection lens (4). . In addition, the light distribution pattern LP for intersection shown in FIG. 8 is formed by the first edge 17 of the first shade portion 14 and the second edge 18 of the second shade portion 15 of the shade 5. The cutoff line CL is formed in this.

That is, part of the reflected light L3 from the lower reflective surface 13 is shielded by the first shade portion 14, and the first light distribution pattern LP1 shown in FIG. 6 is formed as the remaining reflected light L3. . At this time, since the first edge 17 of the first shade portion 14 is located at or near the focal point F3 of the projection lens 4, the first light distribution pattern LP1 is formed by the first edge 17. ), A clear cutoff line CL1 is formed. The first light distribution pattern LP1 forms a central portion of the cross light distribution pattern LP.

On the other hand, a part of the reflected light L4 from the upper reflective surface 13 is shielded by the first shade 14 and the second shade 15, and the second reflected light L4 shown in FIG. The light distribution pattern LP2 is formed. At this time, since the second edge 18 of the second shade portion 15 is positioned closer to the projection lens 4 side than the first edge 17, the second light distribution pattern LP2 is formed by the second edge 18. ), A cutoff line CL2 that is not clearer than the cutoff line CL1 of the first light distribution pattern LP1 is formed. The second light distribution pattern LP2 forms a peripheral portion of the cross light distribution pattern LP.

Furthermore, light of the cutoff line (lower horizontal cutoff line) CL2 on the opposite lane side of the second light distribution pattern LP2 or the portion C in the vicinity thereof is blocked by the shielding portion 22 of the second edge 18. It is missing.

Then, the cross light distribution pattern LP is obtained by combining the first light distribution pattern LP1 and the second light distribution pattern LP2. At this time, the cutoff line CL of the crossing light distribution pattern LP is maintained as a clear cutoff line by the clear cutoff line CL1 of the first light distribution pattern LP1. In addition, the light intensity of the predetermined portion of the cross-distribution light distribution pattern LP, that is, the point A portion of 0.86 ° downward and 3.5 ° rightward, is determined by the missing portion C of the light of the second light distribution pattern LP2. Value, such as 12500 "cd" or less. The predetermined portion of the cross-distribution light distribution pattern LP may be a portion of a point other than the point A as long as it is near the cutoff line CL. In addition, the predetermined value of brightness is not limited to 12500 "cd".

When the solenoid 7 is energized, the solenoid 7 is driven to retreat the retracting rod 21 of the solenoid 7 against the spring force of the spring member 6. As a result, the shade 5 is switched from the upper low beam posture (first posture) shown in FIG. 1 to the lower high beam posture (second posture).

Then, the reflected light (L3, L4) from the reflecting surface 13 of the reflector 3, which has been shielded by the first shade 14 and the second shade 15 of the shade 5 so far, is the remaining reflected light. It progresses to the projection lens 4 side with (L3, L4), and is projected (emission, irradiation) to the front of a motor vehicle as the light distribution pattern HP shown in FIG. 9 via the projection lens 4.

At this time, the reflected light L3 and L4 from the reflecting surface 13 of the reflector 3 shielded by the first shade 14 and the second shade 15 of the shade 5 are the remaining reflected light ( L3, L4). To this end, the luminance of the point B portion of the predetermined portion of the traveling light distribution pattern HP, for example, the point B on the right and left horizontal lines HL-HR (up and down 0 °), 2.58 °, is set to a predetermined value, for example. 25000 "cd" or more can be maintained. In addition, the predetermined part of the traveling light distribution pattern HP may be a part of points other than the point B. FIG. In addition, the predetermined value of brightness is not limited to 25000 "cd".

As described above, the vehicle headlamp 1 according to the present embodiment has requirements that are opposite at two points close to each other, that is, the point A of the cross-distribution light distribution pattern LP and the point B of the travel light distribution pattern HP. That is, the point A can satisfy the requirement to reduce the brightness to 12500 " cd " or less and the point B to maintain the brightness to 25000 " cd " or more.

When the energization to the solenoid 7 is interrupted, the solenoid 7 is in a non-driven state, and the spring member 6 which has been elastically deformed elastically returns to the spring force. As a result, the shade 5 is switched from the lower high beam posture (second posture) to the upper low beam posture (first posture) shown in FIG. 1. Thus, the light distribution pattern HP shown in FIG. 9 is switched from the light distribution pattern HP shown in FIG. 8 to the cross light distribution pattern LP shown in FIG. 8.

The headlamp 1 for a vehicle according to the present embodiment has the above-described configuration and operation, and its effect will be described below.

The vehicle headlamp 1 according to the present embodiment has a first light distribution pattern having a clear cutoff line CL1 by the first edge 17 located at or near the focal point F3 of the projection lens 4. LP1) (see FIG. 6) is obtained. In addition, the second edge 18 positioned closer to the projection lens 4 than the first edge 17 has a cutoff line CL2 that is not clearer than the cutoff line CL1 of the first light distribution pattern LP1. The second light distribution pattern LP2 (see FIG. 7) is obtained, and further, by the shielding portion 22 of the second edge 18, a predetermined portion of the second light distribution pattern LP2, that is, a cutoff line on the opposite lane side Light of (lower horizontal cutoff line) CL2 or the portion C in the vicinity thereof can be dropped.

In the vehicle headlamp 1 according to the present embodiment, a cross-distribution light distribution pattern CL (see FIG. 8) obtained by combining the first light distribution pattern LP1 and the second light distribution pattern LP2 is obtained. That is, while the clear cutoff line CL is maintained by the first light distribution pattern LP1, the cross-distribution light distribution pattern (in which the luminous intensity of the predetermined portion (point A) by the second light distribution pattern LP2 is reduced) LP) is obtained.

As a result, when the vehicle headlamp 1 according to the present embodiment has a predetermined portion (point A) in which the luminous intensity of the crossing light distribution pattern LP is reduced to the opposite lane side, the clearness of the crossing light distribution pattern LP is clear. By the effect with one cut-off line CL, glare with respect to an opposing car can be prevented, and also visibility can be maintained far from the side of a traveling lane, and it can contribute to traffic safety.

In addition, the vehicle headlamp 1 according to the present embodiment is not divided by the reflecting surface 13 of the reflector 3 but by the shield 22 of the second edge 18 of the shade 5. Decreases the brightness of a predetermined portion (point A). As a result, the vehicle headlamp 1 according to the present embodiment controls the fine brightness of the cross-distribution light distribution pattern LP by the shade 5 originally in every three specifications of Japan, Europe, and North America. 3) can be common to Japan, Europe and North America, and manufacturing cost can be reduced. In addition, it is possible to perform the light intensity control simply, reliably and accurately as compared with reducing the light intensity of a predetermined portion of the crossing light distribution pattern on the reflecting surface of the reflector.

In the vehicle headlight 1 according to the present embodiment, when the posture of the shade 5 is changed to the first posture by the spring member 6 and the solenoid 7 of the switching means, the clear cutoff line CL is maintained. The cross-sectional light distribution pattern LP is obtained while the brightness of the predetermined portion (point A) is reduced. Further, when the posture of the shade 5 is switched to the second posture by the solenoid 7 of the switching means, the reflected light L3 and L4 from the reflecting surface 13 of the reflector 3 are made of the shade 5. The traveling light distribution pattern HP is obtained without being cut off to the first shade portion 14 and the second shade portion 15.

As a result, the vehicle headlamp 1 according to the present embodiment can reduce the brightness of a predetermined portion (point A) of the cross-distribution light distribution pattern LP having the cutoff line CL, and the light distribution pattern for traveling The brightness of a predetermined portion (point B) of HP can be maintained at a predetermined value. As described above, the vehicle headlamp 1 according to the present embodiment can easily and reliably obtain the cross-distribution light distribution pattern LP and the traveling light distribution pattern HP having the opposite requirements.

Hereinafter, examples other than the above-described embodiment will be described. In the above embodiment, the shield 22 is projected upward from the second edge 18. By the way, in this invention, as shown in FIG. 10, the shielding part 22 protruded from the 2nd edge 18 to the front projection lens 4 side (shown by a solid line), or obliquely projected (2). Dashed dashed lines). That is, what is necessary is just to shield a part of reflected light L4 from the reflecting surface 13 above the reflector 3.

In addition, in the above-described embodiment, the shade 5 forms a two-piece plate structure of the first shade portion 14 and the second shade portion 15. By the way, in the present invention, as shown in Fig. 11, it may be a shade 500 of one sheet structure. In this case, the corner portion at the light source 2 side behind the shade 500 becomes the first edge 170, and the corner portion at the projection lens 4 side in front of the shade 500 is the second edge 180. Becomes The shield 220 that shields a part of the reflected light L4 from the reflecting surface 13 on the upper side of the reflector 3 protrudes upwards, forwards, or obliquely from the second edge 180.

Furthermore, in the above embodiment, the cross-distribution light distribution pattern LP shown in FIG. 8 and the traveling light distribution pattern HP shown in FIG. 9 are obtained. By the way, in the present invention, the light distribution pattern for intersection and the light distribution pattern for highways are obtained, or the light distribution pattern for intersections and the light distribution pattern for highways and the light distribution pattern for driving are obtained, that is, the light distribution pattern having a cutoff line and other The plurality of light distribution patterns of the light distribution pattern may be obtained.

Furthermore, in the above embodiment, the cross-distribution light distribution pattern LP shown in FIG. 8 and the traveling light distribution pattern HP shown in FIG. 9 are obtained. By the way, in this invention, only one light distribution pattern which has a cutoff line may be obtained.

Furthermore, in the above embodiment, the solenoid 7 is used as the drive unit. By the way, in this invention, it may be other than a solenoid as a drive unit. For example, a motor.

1 shows an embodiment of a headlamp for a vehicle according to the invention, which is a longitudinal sectional view (vertical sectional view) of a lamp unit when the shade is in a low beam position.

2 is a front view similarly showing the shade and the spring member.

3 is a perspective view showing the shade and the spring member likewise.

4 is a partial front view similarly showing the main portion of the second shade portion of the shade.

FIG. 5 is an explanatory cross-sectional view showing a state of shielding or passing the reflected light from the reflecting surface on the upper side of the reflector.

6 is an explanatory view showing a first light distribution pattern formed by the reflected light from the reflecting surface under the reflector in the same manner.

7 is an explanatory view showing a second light distribution pattern formed by the reflected light from the reflecting surface on the upper side of the reflector.

FIG. 8 is an explanatory view showing a light distribution pattern for intersection in which the first light distribution pattern and the second light distribution pattern are similarly synthesized.

9 is an explanatory diagram similarly showing a traveling light distribution pattern.

10 is a partially enlarged cross-sectional view showing a modification of the shield.

11 is a partially enlarged cross-sectional view showing a modification of the shade and the shield.

<Description of the code>

One… Vehicle headlights, 2... Light Source,

3... Reflector, 4... Projection lens,

5, 500... Shade, 6... Spring member (switching means),

7... Solenoid (Drive Unit, Switching Means)

8… Frame member, 9... stopper,

10... Socket apparatus, 11... Light Emitting Part,

12... Perforation, 13... Reflective Surface,

14... First shade portion, 15... The second shade part,

16... Attachment portion, 17, 170... First edge,

18, 180... Second edge, 19... Fixture,

20... Screw, 21... Retreat Rod,

22, 220... Shield 23... Notch,

LP… Light distribution pattern CL for crossing Cutoff Line,

HP… Driving light distribution pattern, LP1... The first light distribution pattern,

CL1... A cutoff line of the first light distribution pattern,

LP2... Second light distribution pattern, CL2... A cutoff line of the second light distribution pattern,

HL-HR... Horizontal line of right and left, VU-VD…. Vertical line (up and down vertical axis),

Z-Z… Optical axis of reflecting surface, Z1-Z1... Optical axis of the projection lens,

F1... First focus of the reflecting surface, F2... Second focal point of the reflective surface,

F3... Focus of the projection lens, L1... Light from the light source to the lower reflective surface,

L2... Light from the light source to the upper reflective surface,

L3... Reflected light from the lower reflective surface,

L4... Reflected light from the upper reflective surface,

A… A point of a predetermined portion that reduces the brightness of the cross-distribution light distribution pattern,

B… The point of the part which keeps the brightness of the traveling light distribution pattern at a predetermined value,

C… Part where light is missing by the shield

Claims (2)

In the headlight for a vehicle of a projector type that irradiates a front of a vehicle with a light distribution pattern having a cutoff line, Light source, A reflector for reflecting light from the light source; A projection lens for projecting the reflected light from the reflector to the front of the vehicle; A shade for cutting off a part of the reflected light from the reflector toward the projection lens and passing the remaining reflected light to the projection lens side to form the light distribution pattern having the cutoff line; An edge formed in the shade to form the cutoff line of the light distribution pattern, The edge has a first edge located at or near the focal point of the projection lens, and a second edge located closer to the projection lens side than the first edge, The second head is provided with a shield for reducing the brightness of a predetermined portion of the light distribution pattern, the headlamp for a vehicle. 2. The method according to claim 1, wherein the posture of the shade is switched to a first posture at which the light distribution pattern having the cutoff line is obtained, and a second posture at which the light reflected from the reflector is not cut off to the shade without obtaining a traveling light distribution pattern. A headlamp for a vehicle, comprising: a switching means.

Images