JP6435903B2 - Vehicle headlamp - Google Patents

Description

  The present invention relates to a projector type vehicle headlamp.

  This type of vehicle headlamp has been conventionally used (for example, Patent Document 1 and Patent Document 2). A conventional vehicle headlamp disclosed in Patent Document 1 includes an LED, a reflector, and a projection lens, and the reflector includes a first reflecting surface and a second reflecting surface. The conventional vehicle headlamp of Patent Document 1 reflects light from an LED on a first reflecting surface to form a diffuse light distribution pattern, and reflects light from the LED on one second reflecting surface. A light condensing light distribution pattern is formed.

  The conventional vehicle headlamp of Patent Document 2 includes a light source module, a reflector, and a projection lens, and the reflector includes a first reflecting surface and a second reflecting surface divided into two on the left and right sides; It is what has. The conventional vehicle headlamp of Patent Document 2 reflects light from the light source module on the first reflecting surface to form a diffused light distribution pattern, and transmits light from the light source module on the two left and right second reflecting surfaces. It is reflected to form a condensed light distribution pattern.

JP2013-143226A JP 2014-10968 A

  However, since the conventional vehicle headlamp of Patent Document 1 has one second reflecting surface that forms a condensing light distribution pattern, the light just above the optical axis is reflected on one reflecting surface. Irradiates the center of the screen and irradiates light away from the optical axis away from the center of the screen. As a result, in the conventional vehicle headlamp of Patent Document 1, as shown in FIG. 8 (B), the projected image I01 of the light emitting portion of the LED intersects at the center of the projected image I01. The dark portion D1 may occur above the center of the high beam light distribution pattern P01, and an ideal light distribution pattern (high beam light distribution pattern) cannot be obtained.

  In the conventional vehicle headlamp disclosed in Patent Document 2, the second reflecting surface forming the light collection and distribution pattern is divided into two on the left and right. Is emitted to the center of the screen, and the light immediately above the optical axis is emitted away from the center of the screen. As a result, in the conventional vehicle headlamp disclosed in Patent Document 2, as shown in FIG. 9B, the projection image I02 of the light emitting unit of the light source module has a left end portion of the projection image I02 and a right end portion of the projection image I02. Therefore, the dark portion D2 may occur at the upper left and right of the center of the light distribution pattern (high beam light distribution pattern) P02, and an ideal light distribution pattern (high beam light distribution pattern) cannot be obtained.

  The problem to be solved by the present invention is that an ideal light distribution pattern (high beam light distribution pattern) cannot be obtained with a conventional vehicle headlamp.

  The present invention (the invention according to claim 1) irradiates the front of a vehicle with a light source, a reflector having a reflection surface based on an ellipse whose first focal point is located at or near the light source, and reflected light from the reflection surface. A condensing reflection surface that forms a condensing light distribution pattern, and a diffuse reflection surface that is disposed on the lens side of the condensing reflection surface and that forms a diffuse light distribution pattern. A first light collecting / reflecting surface, the light collecting / reflecting surface being disposed immediately above the optical axis, and forming a first light collecting / light distribution pattern that is substantially the entire light collecting / light distribution pattern; A second light collecting / reflecting surface that is disposed on the right side of the first light collecting / reflecting surface and forms a second light collecting / light distribution pattern from a substantially central portion to a right end portion of the light collecting / light distribution pattern; It is arranged on the left side of the light reflecting surface, and it is on the left side from the approximate center of the light collection pattern A third light collecting reflecting surface forming a third light collecting light distribution pattern to the portion, is divided into, characterized in that.

  This invention (the invention according to claim 2) is characterized in that the light source is a semiconductor-type light source having a rectangular light emitting portion whose longitudinal direction intersects the left and right direction with respect to the optical axis.

  In this invention (the invention according to claim 3), the division position of the condensing reflection surface and the diffuse reflection surface is located on the opposite side of the lens from the lens side edge of the light source, and the condensing reflection surface is diffuse reflection. The first condensing / reflecting surface is disposed on the light source side with respect to the surface, and the first condensing / reflecting surface is disposed on the light source side with respect to the second condensing / reflecting surface.

  In the vehicle headlamp according to the present invention, the first light collection and distribution surface forms the first light collection light distribution pattern almost entirely of the light collection and light distribution pattern, and the second light collection and reflection surface forms the light collection light distribution pattern. A second condensing light distribution pattern is formed from the substantially central portion to the right end portion, and a third condensing light distribution pattern from the substantially central portion to the left end portion of the condensing light distribution pattern is formed by the third condensing reflection surface. To form. As a result, the vehicle headlamp of the present invention has a light distribution pattern (high beam light distribution pattern) P01 according to the conventional vehicle headlamp of Patent Document 1, as shown in FIGS. As shown in FIG. 9 (A) and FIG. 9 (B), the dark part D1 generated above the center and the center of the light distribution pattern (high beam light distribution pattern) P02 by the conventional vehicle headlamp of Patent Document 2 The dark part D2 generated in the upper left and right can be included in the light collection light distribution patterns P1, P2, and P3. Thereby, an ideal light distribution pattern (high beam light distribution pattern) can be obtained in the vehicle headlamp of the present invention.

FIG. 1 is a schematic longitudinal sectional view (schematic vertical sectional view) of a lamp unit showing an embodiment of a vehicle headlamp according to the present invention. FIG. 2 is a bottom view (viewed from below, as viewed from the direction of the arrow II in FIG. 1) showing a part of the condensing reflection surface and the diffuse reflection surface of the reflector. FIG. 3 is a plan view showing the semiconductor light source (viewed from above, as viewed in the direction of arrow III in FIG. 1). FIG. 4 is an explanatory view showing a projected image of the light emitting part of the semiconductor light source reflected (irradiated) from the first condensing reflection surface, the second condensing reflection surface, and the third condensing reflection surface. FIG. 5 illustrates a first light collection light distribution pattern, a second light collection light distribution pattern, and a third light collection light distribution pattern formed by the first light collection reflection surface, the second light collection reflection surface, and the third light collection reflection surface. It is explanatory drawing which shows. FIG. 6 is a schematic explanatory diagram illustrating a light collection light distribution pattern obtained by combining (superimposing) the first light collection light distribution pattern, the second light collection light distribution pattern, and the third light collection light distribution pattern. FIG. 7 is a schematic explanatory diagram illustrating a light collection light distribution pattern and a diffuse light distribution pattern. FIG. 8 is a schematic explanatory view showing the effect of the light collection light distribution pattern. FIG. 9 is a schematic explanatory diagram illustrating the effect of the light collection light distribution pattern.

  Hereinafter, an example of an embodiment (example) of a vehicle headlamp according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In FIG. 1, hatching of a semiconductor light source, a projection lens, a movable shade, and a solenoid is omitted. 4 to 9, reference sign “VU-VD” indicates vertical lines on the upper and lower sides of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen. In this specification and the appended claims, front, rear, upper, lower, left, and right are front, rear, upper, lower, and left when the vehicle headlamp according to the present invention is mounted on a vehicle. , Right. In the isoilluminance curve of FIG. 5, the central curve is a high illuminance curve, and the illuminance decreases as going outward.

(Description of Configuration of Embodiment)
Hereinafter, the configuration of the vehicle headlamp in this embodiment will be described. In this example, for example, a headlamp of an automotive headlamp will be described.

(Description of the vehicle headlamp 1)
In FIG. 1, the code | symbol 1 is the headlamp for vehicles in this embodiment. The vehicle headlamp 1 is mounted on each of the left and right sides of the front portion of the vehicle. As shown in FIG. 1, the vehicle headlamp 1 includes a lamp housing (not shown), a lamp lens (not shown), a semiconductor light source 2 as a light source, a reflector 3, and a lens. A projection lens 4, a heat sink member 5, a movable shade 6, a solenoid 7, and a power transmission member 8 are provided.

  The lamp housing and the lamp lens (for example, a transparent outer lens) define a lamp chamber (not shown). The semiconductor light source 2, the projection lens 4, the reflector 3, the heat sink member 5, the movable shade 6, the solenoid 7 and the power transmission member 8 constitute a projector type lamp unit. The lamp units 2, 3, 4, 5, 6, 7, and 8 are disposed in the lamp chamber, and have a vertical-direction optical axis adjustment mechanism (not shown) and a horizontal-direction optical axis adjustment mechanism ( (Not shown) is attached to the lamp housing.

  In the lamp chamber, lamp units other than the lamp units 2, 3, 4, 5, 6, 7, and 8, for example, a clearance lamp unit, a turn signal lamp unit, a daytime running lamp unit, and the like are arranged. There is a case. In addition, an inner panel (not shown), an inner housing (not shown), an inner lens (not shown), or the like may be disposed in the lamp chamber.

(Description of heat sink member 5)
The heat sink member 5 is made of a material having high thermal conductivity such as resin or metal die casting (aluminum die casting). The semiconductor light source 2, the reflector 3, the projection lens 4, the solenoid 7, and the power transmission member 8 are attached to the heat sink member 5. The heat sink member 5 serves as both a heat radiating member and a mounting member.

  The heat sink member 5 includes a plate part 50, a ring part 51, and a plurality of fin parts 52. The semiconductor light source 2, the reflector 3, the solenoid 7, and the power transmission member 8 are attached to the plate portion 50. The projection lens 4 is attached to the ring portion 51. The ring portion 51 may be formed of a member separate from the heat sink member 5 and attached to the heat sink member 5.

(Description of the semiconductor-type light source 2)
The semiconductor-type light source 2 is a self-luminous semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL). The semiconductor light source 2 includes a light emitting unit 20 that emits light. As shown in FIG. 3, the light emitting unit 20 has an optical axis (an optical axis of the vehicle headlamp 1, an optical axis (not shown) of a reflecting surface of the reflector 3), and a projection lens 4. The light-emitting surface has a rectangular shape that intersects in the left-right direction (in this example, orthogonal) with respect to the optical axis Z. The light emitting unit 20 is upward in this example.

  The semiconductor-type light source 2 is mounted on the plate portion 50 of the heat sink member 5 and is attached to the plate portion 50 of the heat sink member 5 via a holder 21. The holder 21 is attached to the plate portion 50 of the heat sink member 5 with a screw or the like (not shown). The semiconductor light source 2 is supplied with a current from a lighting circuit (not shown).

(Description of reflector 3)
The reflector 3 is made of, for example, a material having high heat resistance and light impermeability such as a resin member. The reflector 3 is attached to the plate portion 50 of the heat sink member 5 with a screw or the like (not shown).

  The reflector 3 has a hollow shape in which a front part and a lower part are opened, and a rear part, an upper part, and both left and right parts are closed. The concave inner surface of the closed portion of the reflector 3 is provided with reflecting surfaces (convergent reflecting surfaces) 30, 31, 32, 33 composed of free-form surfaces or ellipsoidal surfaces based on ellipses (based on rotating ellipsoids). ing. The reflective surfaces 30, 31, 32, 33 include a first focal point F 1, a second focal point (second focal line) F 2 located at or near the center of the light emitting unit 20 of the semiconductor-type light source 2, and the first And the optical axis connecting the first focal point F1 and the second focal point F2. The reflecting surfaces 30, 31, 32, and 33 reflect light from the light emitting surface of the light emitting unit 20 facing upward toward the projection lens 4 as reflected light.

  The reflecting surfaces include condensing reflecting surfaces 31, 32, 33 on the rear side of the vehicle, and a diffuse reflecting surface 30 located on the front side of the vehicle, that is, on the projection lens 4 side with respect to the first collecting reflecting surface 31. , Are divided by a segment, that is, by a segment. The condensing reflection surfaces 31, 32, and 33 form condensing light distribution patterns P1, P2, and P3. The diffuse reflection surface 30 forms a diffuse light distribution pattern P0. The dividing position of the condensing reflection surfaces 31, 32, 33 and the diffuse reflection surface 30, that is, the stepped portion, is the rear side of the front side of the light emitting unit 20 of the semiconductor-type light source 2, that is, the edge on the projection lens 4 side. Located on the opposite side to the projection lens 4. The condensing reflection surfaces 31, 32, and 33 are disposed at positions closer to the semiconductor light source 2 side than the diffuse reflection surface 30.

  The condensing reflection surface is divided into a first condensing reflection surface 31, a second condensing reflection surface 32, and a third condensing reflection surface 33 via a step portion, that is, a segment. The first condensing / reflecting surface 31 is disposed immediately above the optical axis Z and forms a first condensing light distribution pattern P1 that is substantially the entire condensing light distribution pattern. The second condensing reflection surface 32 and the second condensing light distribution pattern P2 which is disposed on the right side of the first condensing reflection surface 31 and extends from a substantially central portion to a right end portion of the condensing light distribution pattern. Form. The third condensing / reflecting surface 33 is disposed on the left side of the first condensing / reflecting surface 31, and a third condensing light distribution pattern P <b> 3 from the substantially central portion to the left end portion of the condensing light distribution pattern. Form. The first condensing / reflecting surface 31 is disposed at a position closer to the semiconductor light source 2 than the second condensing / reflecting surface 32 and the third condensing / reflecting surface 33.

  A first projected image I1 of the light emitting unit 20 of the semiconductor-type light source 2 reflected (irradiated) from the first condensing / reflecting surface 31 disposed immediately above the optical axis Z is shown in FIG. As shown, it is horizontally long. The first projection image I1 shown in FIG. 4A is a projection image reflected (irradiated) on a two-dot chain line from point A to point B on the first condensing reflection surface 31 in FIG. It is. Since the first condensing / reflecting surface 31 is disposed immediately above the optical axis Z and close to the semiconductor-type light source 2, the first projected image I1 is large. As a result, as shown in FIG. 5A, the first condensing / reflecting surface 31 can irradiate a wide range with the first condensing light distribution pattern P1 which is a horizontally long light distribution. That is, the first condensing reflection surface 31 is suitable for irradiating the horizontally long first condensing light distribution pattern P1. The first projected image I1 and the first light collection light distribution pattern P1 are substantially symmetrical with respect to a vertical line VU-VD above and below the screen.

  As shown in FIG. 4B, the second projected image I2 of the light emitting unit 20 of the semiconductor-type light source 2 reflected (irradiated) from the second condensing / reflecting surface 32 is vertically elongated from the horizontally projected image. The projection image is included. The second projection image I2 shown in FIG. 4B is a projection image reflected (irradiated) on a two-dot chain line from point C to point D on the second condensing reflection surface 32 in FIG. It is. The second projected image I2 reflected (irradiated) from the point D at a position close to the optical axis Z and the semiconductor light source 2 on the second condensing / reflecting surface 32 is horizontally long and large. On the second condensing / reflecting surface 32, the second projected image I2 continuously changes to a vertically long and small projected image as the distance from the point D, that is, the optical axis Z and the semiconductor light source 2 increases. The second projection image I2 reflected (irradiated) from the optical axis Z and the point C far from the semiconductor light source 2 on the second condensing / reflecting surface 32 is vertically long and small. As a result, as shown in FIG. 4B, the second condensing / reflecting surface 32 is a vertically long and small second projection that is reflected (irradiated) from a position far from the optical axis Z and the semiconductor-type light source 2. By collecting the image I2 at the center of the screen (that is, the center where the vertical line VU-VD on the top and bottom of the screen intersects the horizontal line HL-HR on the left and right of the screen), as shown in FIG. A high illuminance zone (peak) can be formed at the center of the screen. That is, the second condensing / reflecting surface 32 is suitable for irradiating the second condensing light distribution pattern P2 from the substantially central portion to the right end portion.

  As shown in FIG. 4C, the third projection image I3 of the light emitting unit 20 of the semiconductor-type light source 2 reflected (irradiated) from the third condensing / reflecting surface 33 is vertically elongated from the horizontally projected image. The projection image is included. The third projection image I3 shown in FIG. 4C is a projection image reflected (irradiated) on a two-dot chain line from the point E to the point F on the third condensing reflection surface 33 in FIG. It is. The third projected image I3 reflected (irradiated) from the point E near the optical axis Z and the semiconductor-type light source 2 on the third condensing / reflecting surface 33 is horizontally long and large. On the third condensing / reflecting surface 33, the third projected image I3 continuously changes to a vertically long and small projected image as the point E, that is, the optical axis Z and the semiconductor-type light source 2 move away. The third projected image I3 reflected (irradiated) from the optical axis Z and the point F far from the semiconductor light source 2 on the third condensing / reflecting surface 33 is vertically long and small. As a result, as shown in FIG. 4C, the third condensing / reflecting surface 33 is a vertically long and small third projection that is reflected (irradiated) from a position far from the optical axis Z and the semiconductor-type light source 2. By collecting the image I3 in the center of the screen, as shown in FIG. 5C, a high illuminance zone (peak) can be formed in the center of the screen. That is, the third condensing / reflecting surface 33 is suitable for irradiating the third condensing light distribution pattern P3 from the substantially central portion to the left end portion.

  The second projection image I2 and the second condensing light distribution pattern P2, and the third projection image I3 and the third condensing light distribution pattern P3 are substantially bilaterally symmetric (substantially horizontally reversed).

(Description of the projection lens 4)
The projection lens 4 is made of a resin lens such as a PC material, a PMMA material, or a PCO material. That is, since the light emitted from the light emitting unit 20 of the semiconductor light source 2 does not have high heat, a resin lens can be used as the projection lens 4. The projection lens 4 is attached to the ring portion 51 of the heat sink member 5. The projection lens 4 may be attached to the heat sink member 5 using a holder separate from the heat sink member 5 instead of the ring portion 51.

  The projection lens 4 has a focal point (focal line, lens focal point, lens focal line, meridional image plane which is a focal plane on the object space side) F3 and the optical axis Z. The focal point F3 of the projection lens 4 is located at or near the second focal point F2 of the reflecting surfaces 30, 31, 32, 33. The optical axis Z of the projection lens 4 and the optical axes of the reflecting surfaces 30, 31, 32, 33 intersect at or near the second focal point F2 and the focal point F3. In some cases, the optical axis Z of the projection lens 4 and the optical axes of the reflecting surfaces 30, 31, 32, and 33 coincide with each other. Further, the focal points F1, F2, F3 and the optical axis Z may be located at positions other than the positions shown in FIG.

  The projection lens 4 is a projection lens based on an aspherical surface. The projection lens 4 includes a rear entrance surface 40 and a front exit surface 41. The incident surface 40 faces the reflector 3. The incident surface 40 is substantially flat or aspheric (a convex surface or a concave surface with respect to the reflector 3). The exit surface 41 is an aspherical convex surface.

  The projection lens 4 is the light from the light emitting unit 20 of the semiconductor light source 2, and reflects the reflected light from the reflecting surfaces 30, 31, 32, and 33 of the reflector 3 to the outside, that is, in front of the vehicle. Irradiate. That is, the projection lens 4 irradiates the front of the vehicle with the first light collection light distribution pattern P1, the second light collection light distribution pattern P2, the third light collection light distribution pattern P3, and the diffuse light distribution pattern P0. To do.

(Description of solenoid 7)
The solenoid 7 is attached to the plate portion 50 of the heat sink member 5 with a screw or the like (not shown). The solenoid 7 moves the movable shade 6 through a plunger 70 and the power transmission member 8 in a first position (a position indicated by a two-dot chain line in FIG. 1) and a second position (a solid line in FIG. 1). Position).

(Description of movable shade 6)
The movable shade 6 is composed of a light-impermeable member, in this example, a metal plate. The movable shade 6 is attached to the plunger 70 of the solenoid 7 via the power transmission member 8. The movable shade 6 is formed by press drawing a metal plate. The movable shade 6 is disposed between the semiconductor light source 2 and the projection lens 4. When the movable shade 6 is located at the first position, a part of the reflected light from the reflective surfaces 30, 31, 32, 33 is cut off, and the remaining edge of the reflected light that is not cut off is used as the upper edge. A low beam light distribution pattern (not shown) having a cut-off line (not shown) and an elbow point (not shown) is formed. When the movable shade 6 is positioned at the second position, a high beam light distribution pattern, that is, the first light collection light distribution pattern P1, the second light collection light distribution pattern P2, the third light collection light distribution pattern P3, The diffused light distribution pattern P0 is formed.

(Description of the power transmission member 8)
The power transmission member 8 is attached to the movable shade 6 and the plunger 70 of the solenoid 7. The power transmission member 8 includes a link member and a spring member. The power transmission member 8 transmits the power of the solenoid 7 to the movable shade 6.

(Description of the operation of the embodiment)
The vehicle headlamp 1 in this embodiment is configured as described above, and the operation thereof will be described below.

  The light emitting unit 20 of the semiconductor light source 2 is turned on. Then, the light radiated from the upward light emitting unit 20 is reflected as reflected light by the diffuse reflection surface 30, the first condensing reflection surface 31, the second condensing reflection surface 32, and the third condensing reflection surface 33 of the reflector 3. Reflected to the projection lens 4 side. Here, when the movable shade 6 is positioned at the second position via the power transmission member 8 by driving the solenoid 7, the reflected light travels toward the projection lens 4 without being shielded by the movable shade 6. The reflected light that has traveled toward the projection lens 4 enters the projection lens 4 from the incident surface 40 of the projection lens 4 and is irradiated from the exit surface 41 of the projection lens 4 to the outside, that is, the front of the vehicle as a high beam light distribution pattern. The

  That is, the reflected light from the diffuse reflection surface 30 is irradiated to the front of the vehicle as the diffuse light distribution pattern P0. The reflected light from the first condensing / reflecting surface 31 is irradiated to the front of the vehicle as the first condensing light distribution pattern P1. The reflected light from the second light collecting / reflecting surface 32 is irradiated to the front of the vehicle as the second light collecting light distribution pattern P2. The reflected light from the third condensing / reflecting surface 33 is irradiated to the front of the vehicle as the third condensing light distribution pattern P3. The diffusion light distribution pattern P0, the first light collection light distribution pattern P1, the second light collection light distribution pattern P2, and the third light collection light distribution pattern P3 are combined (superimposed) to form a high beam light distribution pattern. Is formed.

  Here, the drive of the solenoid 7 is stopped, and the movable shade 6 is moved from the second position to the first position via the power transmission member 8 to be positioned at the first position. Then, a part of the reflected light that is not shielded by the movable shade 6 is shielded by the movable shade 6. Then, the remainder of the reflected light that is not shielded by the movable shade 6 located at the first position proceeds to the projection lens 4 side. The reflected light that has traveled toward the projection lens 4 enters the projection lens 4 from the incident surface 40 of the projection lens 4 and is radiated from the exit surface 41 of the projection lens 4 to the outside, that is, the front of the vehicle as a low beam light distribution pattern. The That is, a part of the diffused light distribution pattern P0, the first light collection light distribution pattern P1, the second light collection light distribution pattern P2, and the third light collection light distribution pattern P3 are shielded, and the remaining light distribution pattern has an upper edge. A low beam light distribution pattern having a cut-off line and an elbow point is formed.

(Explanation of effect of embodiment)
The vehicle headlamp 1 in this embodiment has the above-described configuration and operation, and the effects thereof will be described below.

  The vehicle headlamp 1 in this embodiment forms a first light collection light distribution pattern P1 of almost the entire light collection light distribution pattern by the first light collection and reflection surface 31 (FIG. 5A, FIG. 6). 7 (see FIG. 7, FIG. 8A, FIG. 9A), the second condensing light distribution pattern P2 from the substantially central portion to the right end portion of the condensing light distribution pattern by the second condensing reflection surface 32. Formed (see FIG. 5B, FIG. 6, FIG. 7, FIG. 8A, FIG. 9A), and the third light collecting / reflecting surface 33 causes the left end from the substantially central portion of the light collection light distribution pattern. A third condensed light distribution pattern P3 is formed up to the portion (see FIG. 5C, FIG. 6, FIG. 7, FIG. 8A, and FIG. 9A).

  As a result, as shown in FIGS. 8A and 8B, the vehicle headlamp 1 according to this embodiment has a light distribution pattern (high beam light distribution pattern) by the conventional vehicle headlamp of Patent Document 1. As shown in FIGS. 9 (A) and 9 (B), the dark portion D1 generated above the center of P01 and the light distribution pattern (high beam light distribution pattern) P02 of the conventional vehicle headlamp of Patent Document 2 The dark portion D2 generated at the upper left and right of the center can be included in the light collection light distribution patterns P1, P2, and P3. Thereby, the vehicular headlamp 1 in this embodiment can obtain ideal light distribution patterns, that is, high-beam light distribution patterns P0, P1, P2, and P3.

  The vehicle headlamp 1 in this embodiment is a semiconductor-type light source 2 having a light emitting unit 20 having a rectangular shape whose longitudinal direction intersects the optical axis Z in the left-right direction. For this reason, the vehicle headlamp 1 in this embodiment can reflect the first projection image I1 of the light emitting unit 20 of the horizontally long semiconductor-type light source 2 from the first condensing and reflecting surface 31, and has a wide range. It is suitable for irradiating a horizontally elongated first light distribution pattern P1. Further, the vehicle headlamp 1 in this embodiment can reflect the second projected image I2 of the light emitting unit 20 of the semiconductor light source 2 from the horizontally long to vertically long surface from the second light collecting / reflecting surface 32, and is substantially at the center. It is suitable for irradiating the 2nd condensing light distribution pattern P2 from a part to a right end part. Furthermore, the vehicle headlamp 1 in this embodiment can reflect the third projected image I3 of the light emitting unit 20 of the semiconductor light source 2 from the horizontally long to the vertically long from the third light collecting / reflecting surface 33, almost at the center. This is suitable for irradiating the third condensed light distribution pattern P3 from the portion to the left end portion.

  In the vehicle headlamp 1 in this embodiment, the dividing position of the first condensing / reflecting surface 31, the second condensing / reflecting surface 32, the third condensing / reflecting surface 33 and the diffusing / reflecting surface 30 is the same as that of the semiconductor light source The light emitting unit 20 is located on the rear side (opposite side to the projection lens 4) with respect to the front side (projection lens 4 side) edge. For this reason, the vehicle headlamp 1 in this embodiment includes a semiconductor on the divided surface of the first condensing reflection surface 31, the second condensing reflection surface 32, the third condensing reflection surface 33, and the diffuse reflection surface 30. Light from the light emitting unit 20 of the mold light source 2 can be made incident.

  In the vehicle headlamp 1 according to this embodiment, the first condensing / reflecting surface 31, the second condensing / reflecting surface 32, and the third condensing / reflecting surface 33 are light emitting units 20 of the semiconductor light source 2 rather than the diffuse reflecting surface 30. It is arranged on the side. For this reason, the vehicle headlamp 1 in this embodiment includes the first light collection and reflection surface 31, the second light collection and reflection surface 32, and the third light collection and reflection surface 33. It is suitable for forming the second light collection light distribution pattern P <b> 2 and the third light collection light distribution pattern P <b> 3, and is suitable for forming the diffusion light distribution pattern P <b> 0 from the diffuse reflection surface 30.

  In the vehicle headlamp 1 in this embodiment, the first condensing / reflecting surface 31 is arranged closer to the light emitting unit 20 side of the semiconductor light source 2 than the second condensing / reflecting surface 32 and the third condensing / reflecting surface 33. It is what. For this reason, the vehicle headlamp 1 in this embodiment is suitable for reflecting the large first long projected image I1 by the first condensing reflection surface 31, and the second condensing light distribution. The pattern P2 and the third condensed light distribution pattern P3 are suitable for reflecting the second projection image I2 and the third projection image I3 that include a large horizontal projection image to a small vertical projection image.

(Description of example other than embodiment)
In this embodiment, the low beam light distribution pattern and the high beam light distribution pattern are switched by the action of the movable shade 6, the solenoid 7, and the power transmission member 8. However, in the present invention, only the high beam light distribution pattern may be irradiated without using the movable shade 6, the solenoid 7 and the power transmission member 8.

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 2 Semiconductor type light source 20 Light emission part 21 Holder 3 Reflector 30 Diffuse reflective surface 31 1st condensing reflective surface 32 2nd condensing reflective surface 33 3rd condensing reflective surface 4 Projection lens 40 Incident surface 41 Outgoing Surface 5 Heat sink member 50 Plate portion 51 Ring portion 52 Fin portion 6 Movable shade 7 Solenoid 70 Plunger 8 Power transmission member A, B, C, D, E, F Point D1 By the conventional vehicle headlamp of Patent Document 1 Dark part D2 Dark part by the vehicle headlamp of the conventional patent document 2 F1 1st focus F2 2nd focus F3 focus HL-HR Left and right horizontal lines I1 1st projection image I2 2nd projection image I3 3rd projection image I01 Conventional Projection image by vehicle headlamp of Patent Document 1 of Japanese Patent No. 10102 Projection image by vehicle headlamp of conventional Patent Document 2 P0 Diffusion light distribution pattern P1 P2 2nd light collection light distribution pattern P3 3rd light collection light distribution pattern P01 High beam light distribution pattern by the vehicle headlamp of the conventional patent document 1 P02 High beam distribution by the vehicle headlamp of the conventional patent document 2 Optical pattern VU-VD Vertical line on the screen Z Optical axis

Claims (3)

A light source;
A reflector having a reflecting surface whose first focus is based on an ellipse located in the light source or its vicinity;
A lens for irradiating the front of the vehicle with the reflected light from the reflecting surface;
With
The reflecting surface is divided into a condensing reflecting surface that forms a condensing light distribution pattern and a diffuse reflecting surface that is disposed closer to the lens than the condensing reflecting surface and forms a diffuse light distribution pattern. And
The condensing / reflecting surface is disposed immediately above the optical axis, and forms a first condensing / light-distributing surface that forms substantially the entire first condensing / light-distributing pattern, and the first condensing / reflecting surface. A second condensing reflection surface that is disposed on the right side of the reflecting surface and forms a second condensing light distribution pattern from a substantially central portion to a right end portion of the condensing light distribution pattern; and the first condensing reflection Arranged on the left side of the surface, and is divided into a third condensing reflection surface that forms a third condensing light distribution pattern from the substantially central portion to the left end portion of the condensing light distribution pattern,
A vehicle headlamp characterized by that. The light source is a semiconductor light source having a rectangular light emitting portion whose longitudinal direction intersects the optical axis in the left-right direction.
The vehicle headlamp according to claim 1. The division position of the condensing reflection surface and the diffuse reflection surface is located on the opposite side of the lens from the lens side edge of the light source,
The condensing reflection surface is disposed closer to the light source than the diffuse reflection surface,
The first condensing reflection surface is disposed closer to the light source than the second condensing reflection surface and the third condensing reflection surface.
The vehicle headlamp according to claim 1 or 2, characterized in that

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