JP2009104790A - Head lamp of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it is required not to provide glare in a specified second light distribution pattern, relating to a light distribution pattern in which a specified first light distribution pattern has a cut off line. <P>SOLUTION: The invention comprises second reflectors 6L and 6R, and second reflecting surfaces 11L and 11R. The lower parts of the second reflectors 6L and 6R are provided with edges 16L and 16R for forming cut off lines LCL and RCL along the cut off line of first light distribution pattern LP on second light distribution patterns LSP and RSP. As a result, if the specified first light distribution pattern LP has a cut off line, the specified second light distribution patterns LSP and RSP provide no glare. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicular headlamp such as a projector-type headlamp or fog lamp that irradiates light in front of a vehicle to illuminate a road surface in front of the vehicle. In particular, the present invention relates to a vehicle headlamp that can illuminate the left and right of the vicinity of the vehicle over a wide range.

  Projector-type headlamps and fog lamps that illuminate the front of the vehicle with light and illuminate the road surface in front of the vehicle. 2. Description of the Related Art A vehicle headlamp (for example, Patent Document 1) that can perform the above has been conventionally used. Hereinafter, a conventional vehicle headlamp will be described. A conventional vehicle headlamp includes a main reflector having a main reflection surface based on a spheroid surface, a light source disposed in the vicinity of the first focal point of the main reflection surface, and a vicinity of the second focal point of the main reflection surface. A shade that cuts off a portion of the reflected light from the reflected light reflected by the main reflecting surface and passes the remaining reflected light to form a predetermined main light distribution pattern; and A projection lens that is disposed in front of the second focal point and the shade, projects the main light distribution pattern to the outside front, a sub-reflector disposed between the main reflector and the projection lens, and the sub-reflector A sub-reflecting surface provided to reflect light from the light source and irradiate the left and right outer sides of the main light distribution pattern as a predetermined sub-light distribution pattern through the projection lens; It is as it has.

  Hereinafter, the operation of the conventional vehicle headlamp will be described. When the light source is turned on, a part of the light from the light source is reflected by the main reflecting surface. A part of the reflected light is cut off by the shade, and the remaining reflected light passes and is formed as a predetermined main light distribution pattern. The predetermined main light distribution pattern is irradiated to the outside front, that is, the front of the vehicle through the projection lens. Further, direct light from the light source (light that is not reflected by the main reflection surface and not cut off by the shade and is not normally used effectively) is reflected by the sub-reflection surface toward the projection lens. This reflected light is irradiated as a predetermined sub-light distribution pattern to the left and right outer sides of the main light distribution pattern through the projection lens.

  In the above vehicle headlamp, when the predetermined main light distribution pattern is a light distribution pattern having a cut-off line, it is necessary to prevent glare from being generated in the predetermined sub light distribution pattern. In the light distribution pattern, sufficient light intensity (illuminance) is necessary to visually recognize the left and right outer sides of the main light distribution pattern.

JP-A-2005-347168

  The problem to be solved by the present invention is that when the predetermined main light distribution pattern is a light distribution pattern having a cut-off line, it is necessary not to give glare with the predetermined sub-light distribution pattern. In this sub-light distribution pattern, a sufficient light intensity (illuminance) is necessary to visually recognize the left and right outer sides of the main light distribution pattern.

  The present invention (the invention according to claim 1) is an elliptical reflecting surface in which the first focal point is located at or near the light source and the second focal point is located at or near the projection lens, and the light from the light source is projected into the projection lens. The left second reflecting surface and the right second reflecting surface that irradiate the left and right sides of the first light distribution pattern as the second light distribution pattern on the left side and the second light distribution pattern on the right side through the projection lens. And a second reflector on the left side and a second reflector on the right side, which are provided on the left and right sides between the first reflector and the projection lens. The second light distribution pattern on the left side and the second light distribution pattern on the right side are arranged along the cut-off line of the first light distribution pattern on the lower part of the second reflector on the left side and the lower part of the second reflector on the right side. Edges forming the cut-off line is provided, characterized in that.

  Further, the present invention (the invention according to claim 2) is a light distribution pattern in which the first light distribution pattern has a lower horizontal cutoff line on the opposite lane side, a central oblique cutoff line, and an upper horizontal cutoff line on the own lane side. The cut-off line of either the second light distribution pattern on the left side or the second light distribution pattern on the right side follows the lower horizontal cut-off line, and either the second light distribution pattern on the left side or the second light distribution pattern on the right side The other cut-off line is located along or below the upper horizontal cut-off line.

  Further, according to the present invention (the invention according to claim 3), the shade switches the reflected light from the first reflecting surface toward the projection lens to a plurality of beams from which the first light distribution pattern and at least the traveling light distribution pattern can be obtained. And the drive device which switches the attitude | position of the shade to the several attitude | position from which several beams are obtained is provided, It is characterized by the above-mentioned.

  Furthermore, the present invention (the invention according to claim 4) is characterized in that the second reflector on the left side and the second reflector on the right side are switched to a plurality of postures in conjunction with the shade.

  The vehicle headlamp according to the present invention (the invention according to claim 1) includes the second light distribution pattern on the left side and the right side by the edges provided at the lower part of the second reflector on the left side and the lower part of the second reflector on the right side. In the second light distribution pattern, a cut-off line along the cut-off line of the first light distribution pattern is formed. As a result, the vehicle headlamp according to the present invention (the invention according to claim 1) is the first light distribution pattern (predetermined main light distribution pattern) even when the light distribution pattern has a cut-off line. Glare can be surely prevented by the second light distribution pattern on the left side and the second light distribution pattern on the right side in which the cut-off line along the cut-off line of one light distribution pattern is formed.

  Moreover, the vehicle headlamp according to the present invention (the invention according to claim 1) has the first focal point located at or near the light source as the second reflective surface on the left side and the second reflective surface on the right side. Uses an elliptical reflecting surface located at or near the projection lens. For this reason, the vehicle headlamp according to the present invention (the invention according to claim 1) is provided on the lower side of the second reflector on the left side by the second reflecting surface on the left side of the elliptical reflecting surface and the second reflecting surface on the right side. Even if the part and the lower part of the second reflector on the right side are cut out and edges are provided on the lower part of the second reflector on the left side and the lower part of the second reflector on the right side, direct light from the light source (on the first reflecting surface) The light that is not reflected and not cut off by the shade and is not normally used effectively) is used with high efficiency, and the first second light distribution pattern on the left side and the second light distribution pattern on the right side through the projection lens. It can irradiate both left and right sides of the light distribution pattern. As a result, the vehicle headlamp of the present invention (the invention according to claim 1) has the second light distribution pattern on the left side and the second light distribution pattern on the right side in which a cut-off line is formed along the cut-off line of the first light distribution pattern. The light distribution pattern can be maintained at a high light intensity (high illuminance), and in the second light distribution pattern, a light intensity (illuminance) sufficient to visually recognize the left and right outer sides of the first light distribution pattern is obtained.

  In the vehicle headlamp according to the present invention (the invention according to claim 2), the cut-off line of either the left second light distribution pattern or the right second light distribution pattern is opposite to the first light distribution pattern. Along the lower horizontal cut-off line on the lane side, either the second light distribution pattern on the left side or the second light distribution pattern on the right side is along the upper horizontal cut-off line on the own lane side of the first light distribution pattern or Located below the upper horizontal cut-off line. Therefore, in the vehicle headlamp according to the present invention (the invention according to claim 2), the first light distribution pattern has a lower horizontal cut-off line on the opposite lane side, an oblique cut-off line in the center, and an upper horizontal cut on the own lane side. Even in the case of a light distribution pattern having an off-line, the second light distribution pattern on the left side and the second light distribution pattern on the right side in which a cut-off line is formed along the lower horizontal cut-off line and the upper horizontal cut-off line of the first light distribution pattern. Glare can be more reliably prevented by the light distribution pattern.

  Furthermore, in the vehicle headlamp according to the present invention (the invention according to claim 3), the first light distribution pattern and at least the travel light distribution pattern are obtained by switching the posture of the shade by the driving device. In addition, the vehicle headlamp according to the present invention (the invention according to claim 3) has the left and right sides of the first light distribution pattern by the second reflecting surface of the left second reflector and the second reflecting surface of the right second reflector. A left second light distribution pattern and a right second light distribution pattern having a cut-off line along the cut-off line of the first light distribution pattern are irradiated on both sides and the left and right sides of the traveling light distribution pattern. For this reason, the vehicle headlamp according to the present invention (the invention according to claim 3) is wide in the vicinity of the vehicle in the same manner as the first light distribution pattern even in the case of the traveling light distribution pattern. It can be illuminated over a range.

  Furthermore, in the vehicle headlamp according to the present invention (the invention according to claim 4), the attitude of the shade, the attitude of the second reflector on the left side, and the attitude of the second reflector on the right side are switched in conjunction by the drive device. . For this reason, the vehicle headlamp according to the present invention (the invention according to claim 4) provides the first light distribution pattern and at least the travel light distribution pattern. In addition, the left and right sides of the first light distribution pattern are irradiated with the second light distribution pattern on the left side and the second light distribution pattern on the right side having a cut-off line along the cut-off line of the first light distribution pattern. On the left and right sides of the light distribution pattern for the left side, the second light distribution pattern on the left side irradiated with the left and right sides of the first light distribution pattern and the second light distribution pattern on the left side different from the second light distribution pattern on the right side The right second light distribution pattern is irradiated. As a result, the vehicular headlamp according to the present invention (the invention according to claim 4) has a wide left and right range in the vicinity of the vehicle as in the first light distribution pattern even in the case of the traveling light distribution pattern. Can be illuminated.

  Hereinafter, five examples of embodiments of a vehicle headlamp according to the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments. In the drawing, 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. Further, in this specification or claims, “up, down, front, back, left, right” means “up, down, front, back, when the vehicle lamp according to the present invention is mounted on a vehicle. "Left, right".

  1 to 10 show Embodiment 1 of a vehicle headlamp according to the present invention. Hereinafter, the configuration of the vehicle headlamp according to the first embodiment will be described. In FIG. 1, reference numeral 1 denotes a vehicle headlamp according to the first embodiment. The vehicular headlamp 1 is, for example, a projector type four-lamp headlight for low-pass, which is mounted on the left and right of the front of a vehicle (vehicle). The vehicle headlamp 1 is used for left-hand traffic in Japan. The vehicular headlamp used for European left-hand traffic has substantially the same configuration as the vehicular headlamp 1. Further, the vehicle headlamp used for right-hand traffic in Europe and right-hand traffic in North America has a configuration in which the left and right sides of the vehicle headlamp 1 are substantially reversed.

  The vehicle headlamp 1 includes a first reflector (existing reflector, main reflector, main reflector) 2 having a first reflecting surface (existing reflecting surface, main reflecting surface, main reflecting surface) 7, and a discharge lamp as a light source. 3, a shade 4, a projection lens (condensing lens, convex lens) 5, and second reflectors (additional reflectors, auxiliary reflectors) and second reflectors (additional reflectors, auxiliary reflectors, sub-reflectors) 11 </ b> L and 11 </ b> R. , Sub-reflectors) 6L, 6R, a lamp housing (not shown), and a lamp lens (not shown) (for example, a transparent outer lens).

  The first reflector 2 and the discharge lamp 3 and the shade 4 and the projection lens 5 of the first reflecting surface 7 and the second reflectors 6L and 6R of the second reflecting surfaces 11L and 11R are lamp units. Constitute. The lamp unit is disposed, for example, via an optical axis adjusting mechanism (not shown) in a lamp chamber (not shown) defined by the lamp housing and the lamp lens. A lamp unit other than the lamp unit may be arranged in the lamp chamber.

  The first reflector 2 has a hollow concave shape with an opening on the front side (light irradiation direction side of the vehicle headlamp 1, the projection lens 5 side) and a closed rear side. The first reflecting surface 7 is formed on the inner concave surface of the first reflector 2 by aluminum vapor deposition or silver coating. The first reflecting surface 7 reflects light emitted from the light emitting portion 9 of the discharge lamp 3 to the front side, that is, the shade 4 and the projection lens 5 side.

  The first reflective surface 7 is an elliptical reflective surface. That is, the first reflecting surface 7 is a free-form curved surface (NURBS curved surface) that has an ellipse as a basis (reference, keynote). The reflection surface of a free curved surface (NURBS curved surface) based on the above ellipse has an elliptical vertical cross section in FIGS. 5 and 6 and a horizontal cross section in FIGS. 1, 4 and 7 to 9 is a parabola. Or it consists of a reflective surface forming a deformed parabola. The first reflecting surface 7 has a first focal point F1, a second focal point F2, and an optical axis ZZ. The second focal point F2 is a focal line on a horizontal section, that is, a curved focal line with both ends positioned on the front side and the center positioned on the rear side as viewed from above (plane). The free-form surface (NURBS surface) of the first reflecting surface 7 is a NURBS free-form surface (Non-Uniform Rational B-Spline Surface) described in “Mathematical Elemennts for Computer Graphics” (Devid F. Rogers, J Alan Adams). ). The first reflecting surface 7 may be a reflecting surface made of a simple spheroidal surface having a first focal point, a second focal point, and an optical axis. In this case, the second focal point is not a focal line but a focal point.

  Since the first reflecting surface 7 of the inner concave surface of the first reflector 2 is an elliptical reflecting surface, the light from the light emitting portion 9 of the discharge lamp 3 is wider than the semiconductor light source. It can be reflected over a wide range. Thereby, the light from the light emitting part 9 of the discharge lamp 3 can be effectively used over a wide range.

  A through-hole 12 is provided at a location where the optical axis ZZ of the first reflecting surface 7 intersects in the closed portion on the rear side of the first reflector 2. The socket mechanism 8 is detachably attached to the edge of the through hole 12 in a state where the discharge lamp 3 is inserted into the first reflector 2 from the through hole 12. As a result, the discharge lamp 3 is detachably attached to the first reflector 2 via the socket mechanism 8. Further, the light emitting portion 9 of the discharge lamp 3 is located at the first focal point F11 of the first reflecting surface 7 or in the vicinity thereof. That is, the first focal point F11 of the first reflecting surface 7 is located at or near the light source (the light emitting unit 9 of the discharge lamp 3).

  The first reflector 2 is fixedly held by a holder or a frame (not shown). As shown in FIGS. 8 and 9, the first reflecting surface 7 reflects a part of the light L <b> 1 out of the light L <b> 1 and L <b> 2 from the discharge lamp 3 to have a predetermined light distribution pattern, for example, for passing. Is used as a light distribution pattern LP (see FIG. 10). On the other hand, among the lights L1 and L2 from the discharge lamp 3, the light L2 other than the light L1 reflected by the first reflecting surface 7 is light that is normally not used effectively (ineffective light).

  The discharge lamp 3 is a so-called high pressure metal vapor discharge lamp such as a metal halide lamp, a high intensity discharge lamp (HID), or the like. The discharge lamp 3 is detachably attached to the first reflector 2 via the socket mechanism 8. The light emitting portion 9 of the discharge lamp 3 is located at or near the first focal point F1 of the first reflecting surface 7 of the first reflector 2. In addition to the discharge lamp 3, the light source may be a halogen bulb or an incandescent bulb.

  The shade 4 is made of a plate member that is inexpensive to manufacture, and has a plate shape that covers the lower half of the opening on the front side of the first reflector 2. The shade 4 shields a part of the reflected light L3 from the first reflecting surface 7 toward the projection lens 5 and cuts off the remaining reflected light L4 that is not shielded (lower horizontal cut-off line on the opposite lane side). CL1, oblique cut-off line CL2, upper horizontal cut-off line CL3 on the own lane side) and predetermined first light distribution pattern LP having elbow point E (intersection of lower horizontal cut-off line CL1 and oblique cut-off line CL2), for example, FIG. The light distribution pattern LP for passing shown in FIG. 1 and FIG. 10 is formed. The elbow point E is located on the vertical line VU-VD above and below the screen and below the horizontal line HL-HR on the left and right of the screen, and measures the luminous intensity value of the passing light distribution pattern LP. It becomes the standard.

  On the upper edge of the shade 4, an edge (upper horizontal edge 13, oblique edge 14, lower horizontal edge 10) and an elbow point 15 (intersection of the upper horizontal edge 13 and the oblique edge 14) are provided. The edges (upper horizontal edge 13, oblique edge 14, lower horizontal edge 10) and elbow point 15 are the cut-off lines (lower horizontal cut-off line CL1, oblique cut-off line CL2, upper horizontal cut) of the passing light distribution pattern LP. The off-line CL3) and the elbow point E are formed respectively. That is, the upper horizontal edge 13 forms the lower horizontal cutoff line CL1, the oblique edge 14 forms the oblique cutoff line CL2, the lower horizontal edge 10 forms the upper horizontal cutoff line CL3, and the elbow point 15 defines the elbow point E. Form. The elbow point 15 is the lens focal point (not shown) of the projection lens 5 or the vicinity thereof, the second focal point F2 of the first reflecting surface 7 or the vicinity thereof, or the light of the first reflecting surface 7. Located on or near axis ZZ.

  The shade 4 is a part of the reflected light L3 mainly from the lower part of the first reflecting surface 7, and is a cut-off line (lower horizontal cut-off line CL1, diagonal cut) of the passing light distribution pattern LP. Off-line CL2, upper horizontal cut-off line CL3) is shielded from the reflected light irradiated on the upper side.

  The projection lens 5 is an aspheric lens convex lens. The front side of the projection lens 5 forms a convex aspheric surface, while the rear side of the projection lens 5 forms a flat aspheric surface (plane). The projection lens 5 has a lens focal point (a meridional image plane that is a focal plane on the object space side) and a lens optical axis (not shown). The lens focal point of the projection lens 5 and the second focal point F2 of the first reflecting surface 7 coincide (including substantially coincidence). Therefore, the lens focal point of the projection lens 5 is a focal line, like the second focal point F2 of the first reflecting surface 7. Further, the optical axis of the projection lens 5 and the optical axis ZZ of the first reflecting surface 7 coincide (including substantially coincidence). The optical axis of the projection lens 5 and the optical axis ZZ of the first reflecting surface 7 may be shifted left and right. Further, when the first reflection surface 7 is a reflection surface made of a simple spheroid, the lens focus of the projection lens 5 is not a focal line but the focal point as in the second focus F2 of the first reflection surface 7. It becomes.

  The second reflectors 6L and 6R are disposed on the left and right sides between the first reflector 2 and the projection lens 5. The second reflectors 6L and 6R may also be used as the holder or the frame. The second reflectors 6L and 6R are provided with the second reflecting surfaces 11L and 11R, respectively. When the second reflectors 6L and 6R are also used as the holder and the frame, the second reflecting surfaces 11L and 11R are provided on the holder and the frame, respectively. The second reflecting surfaces 11L and 11R are mainly provided in front of the second focal point F2 of the first reflecting surface 7 (on the projection lens 5 side). As shown in FIGS. 7 and 9, the second reflecting surfaces 11L and 11R reflect the direct light (direct light, invalid light) L2 from the discharge lamp 3 which is not normally used effectively, and the reflected light. L5 is transmitted through the projection lens 5 as predetermined second light distribution patterns (additional light distribution pattern, auxiliary light distribution pattern, sub light distribution pattern) LSP, RSP on the left and right outer sides of the light distribution pattern LP for passing. Irradiation.

  The second reflecting surfaces 11 </ b> L and 11 </ b> R are elliptical reflecting surfaces, like the first reflecting surface 7. That is, the second reflecting surfaces 11L and 11R are free-form curved surfaces (NURBS curved surfaces) that have an ellipse as a basis (reference, keynote). The reflection surface of a free curved surface (NURBS curved surface) based on the ellipse is a horizontal cross section of FIGS. 1, 4 and 7 to 9, and a vertical cross section of FIGS. 5 and 6 is a parabola. Or it consists of a reflective surface forming a deformed parabola. The second reflecting surfaces 11L and 11R have a first focal point F10, a second focal point F20, and an optical axis (not shown). The second focal point F20 is a focal line on a vertical section, that is, a curved focal line with both ends positioned on the front side and the center positioned on the rear side when viewed from the side (side surface). The free-form surface (NURBS surface) of the second reflecting surfaces 11L and 11R is a NURBS free-form surface (Non-Uniform Rational B-) described in “Mathematical Elemennts for Computer Graphics” (Devid F. Rogers, J Alan Adams). Spline Surface). The second reflecting surfaces 11L and 11R may be reflecting surfaces composed of a simple spheroidal surface having a first focal point, a second focal point, and an optical axis, like the first reflecting surface 7. In this case, the second focal point is not a focal line but a focal point.

  The first focal point F10 of the second reflecting surfaces 11L and 11R is located in the light emitting portion 9 of the discharge lamp 3 or in the vicinity thereof. On the other hand, the second focal point F20 of the second reflecting surfaces 11L and 11R is located on the optical axis ZZ in the projection lens 5. The second focal point F20 of the second reflecting surfaces 11L and 11R may be positioned in the vicinity of the projection lens 5. Further, the second focal point F20 of the second reflecting surfaces 11L and 11R may be positioned in front of the projection lens 5.

  Below the second reflector 6L on the left side, the second light distribution pattern LSP on the left side, along the upper horizontal cutoff line CL3 of the first light distribution pattern LP or below the upper horizontal cutoff line CL3 (screen The edge 16L which forms the cut-off line LCL located slightly below the horizontal line HL-HR on the left and right sides is provided. In addition, an edge 16R that forms a cut-off line RCL along the lower horizontal cut-off line CL1 of the first light distribution pattern LP is formed in the lower part of the right second reflector 6R in the right second light distribution pattern RSP. Is provided.

  The vehicle headlamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  First, the discharge lamp 3 is turned on. Then, a part of the light L1 out of the light L1 and L2 from the discharge lamp 3 is reflected by the first reflecting surface 7, as shown in FIGS. The reflected light L3 is collected at the second focal point F2 of the first reflecting surface 7. A part of the condensed reflected light L3 is cut off by the shade 4. The remaining reflected light L4 that has not been cut off, that is, the reflected light L4 that has passed through the shade 4, is diffused and irradiated to the outside front through the projection lens 5. As a result, as shown in FIGS. 1 and 10, a passing light distribution pattern LP having a cut-off line (lower horizontal cut-off line CL1, oblique cut-off line CL2, upper horizontal cut-off line CL3) is obtained.

  At the same time, among the lights L1 and L2 from the discharge lamp 3, the light that is normally invalid without being reflected by the first reflecting surface 7, that is, the direct light L2 from the discharge lamp 3, is shown in FIGS. As shown in FIGS. 7 and 9, the light is reflected by the second reflecting surfaces 11L and 11R. The reflected light L5 is slightly upward as shown in FIGS. Further, as shown in FIGS. 7 and 9, the reflected light L5 is focused on the second focal point F20 of the second reflecting surfaces 11L and 11R in the projection lens 5 and is closer to the optical axis ZZ. The light mainly enters the projection lens 5 from a flat aspheric surface (plane) on the rear side of the projection lens 5. At this time, most of the reflected light L5 does not cross the optical axis ZZ until it enters the projection lens 5. The light L5 incident on the projection lens 5 is emitted from the convex aspheric surface on the front side of the projection lens 5 to the side opposite to the optical axis ZZ with respect to the normal line (not shown) of the projection lens 5 surface. Then, it is irradiated at a wide angle on the left and right outer sides in front of the outside. As a result, as shown in FIG. 1, second light distribution patterns LSP and RSP located on the left and right outside of the light distribution pattern LP for passing are obtained.

  The vehicle headlamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicle headlamp 1 according to the first embodiment, an upper horizontal cut of the first light distribution pattern LP is performed on the second light distribution pattern LSP on the left side by the edge 16L provided at the lower portion of the second reflector 6L on the left side. A cut-off line LCL is formed along the off-line CL3 or below the upper horizontal cut-off line CL3 (slightly below the horizontal line HL-HR on the left and right of the screen), and is provided below the right second reflector 6R. The cut-off line RCL along the lower horizontal cut-off line CL1 of the first light distribution pattern LP is formed in the right second light distribution pattern RSP by the edge 16R. As a result, in the vehicle headlamp 1 according to the first embodiment, the first light distribution pattern LP (predetermined main light distribution pattern) has a cut-off line (lower horizontal cut-off line CL1, oblique cut-off line CL2, upper horizontal cut-off line CL3. ), That is, in the case of the light distribution pattern LP for passing, along the upper horizontal cutoff line CL3 of the first light distribution pattern LP or below the upper horizontal cutoff line CL3 (on the left and right sides of the screen). A left second light distribution pattern LSP formed with a cut-off line LCL positioned slightly below the horizontal line HL-HR and a cut-off line RCL along the lower horizontal cut-off line CL1 of the first light distribution pattern LP are formed. The second right light distribution pattern RSP on the right side prevents glare. Can.

  That is, the second reflecting surfaces 11 </ b> L and 11 </ b> R of the second reflectors 6 </ b> L and 6 </ b> R are elliptical reflecting surfaces like the first reflecting surface 7. Therefore, as shown by the two-dot chain line in FIG. 5 and the two-dot chain line in FIG. 6, the edges 16L and 16R are formed below the second reflectors 6L and 6R (the edges 16L and 16 are as shown in FIG. 1). In the case where the second light distribution patterns LSP and RSP are not provided with the edges for forming the cut-off lines LCL and RCL along the cut-off lines CL3 and CL1 of the first light distribution pattern LP. In this case, due to the distortion of the projection lens 5 (particularly, the distortion at the end (periphery) of the projection lens 5), as shown in FIG. The light distribution patterns LSP3 and RSP3 are respectively irradiated. A part of the second light distribution patterns LSP3 and RSP3 (the hatched portion in FIG. 10A) is above the cut-off lines LCL and RCL of the second light distribution patterns LSP and RSP. To position. A part of the second light distribution pattern LSP3, RSP3 located above the cut-off line LCL, RCL of the second light distribution pattern LSP, RSP (the hatched portion in FIG. 10A) As a result, there is a risk of glare.

  On the other hand, in the vehicle headlamp 1 according to the first embodiment, the lower portions of the second reflectors 6L and 6R are cut out and the edges 16L and 16R are provided below the second reflectors 6L and 6R. The edges 16L and 16R can form cut-off lines LCL and RCL along the cut-off lines CL3 and CL1 of the first light distribution pattern LP in the second light distribution patterns LSP and RSP. As a result, the vehicle headlamp 1 in the first embodiment is located above the second light distribution patterns LSP3 and RSP3 of the second light distribution patterns LSP and RSP of the second light distribution patterns LSP3 and RSP3. Part of the position (the part with hatched lines in FIG. 10A) can be removed, and glare can be reliably prevented.

  Moreover, the vehicular headlamp 1 according to the first embodiment is configured such that the first focal point F10 is positioned at or near the discharge lamp 3 and the second focal point F20 is at or near the projection lens 5 as the second reflecting surfaces 11L and 11R. The ellipsoidal reflecting surface located at is used. For this purpose, the vehicular headlamp 1 according to the first embodiment cuts out the lower part of the second reflectors 6L and 6R by the second reflecting surfaces 11L and 11R which are elliptically reflecting surfaces, and the second reflector 6L. Even if the edges 16L and 16R are provided at the lower part of 6R, direct light L2 from the light discharge lamp 3 (light that is not reflected by the first reflecting surface 7 and is not cut off by the shade 4 and is not normally used effectively) ) Can be applied to the left and right sides of the first light distribution pattern LP through the projection lens 5 as the second light distribution patterns LSP and RSP. Thereby, the vehicle headlamp 1 according to the first embodiment increases the second light distribution patterns LSP and RSP in which the cut-off lines LCL and RCL along the cut-off lines CL3 and CL1 of the first light distribution pattern LP are formed. The light intensity (high illuminance) can be maintained.

  Hereinafter, the maintenance of the high luminous intensity (high illuminance) of the second light distribution patterns LSP and RSP will be described with reference to FIGS. 10 (A), (B), (C), and (D). FIG. 10A shows the second reflectors 6L and 6R of the vehicle headlamp 1 according to the first embodiment (the lower portions of the second reflectors 6L and 6R are cut off and edges 16L and 16R are provided below the second reflectors 6L and 6R. The second light distribution patterns LSP, RSP formed by the second reflecting surfaces 11L, 11R of the second reflector 6L, 6R) and the lower part of the second reflector are not deleted and the edge is formed at the lower part of the second reflector. The second reflector formed by the second reflecting surface of the elliptical reflecting surface of the second reflector (see the two-dot chain line in FIG. 5 and the two-dot chain line in FIG. 6; hereinafter referred to as “simply second reflector”). It is explanatory drawing which shows 2 light distribution patterns and the light distribution pattern LP for passing. In addition, the alternate long and two short dashes line in the second light distribution pattern LSP on the left side in FIG. 10A shows an isoluminous curve, and this isoluminous curve is shown on the left side as shown in the luminous intensity value in FIG. The light intensity value increases from the right to the right. FIG. 10 (B) is an explanatory diagram showing the light intensity value along the alternate long and short dash line (horizontal line passing through the elbow point E) in FIG. 10 (A). The vertical axis indicates the light intensity value, and the light intensity value increases as going upward. Get higher. In FIG. 10B, the light intensity values of the left part of the left second light distribution pattern LSP and the passing light distribution pattern LP are shown, and the right second light distribution pattern RSP and the passing light distribution pattern are shown. The light intensity value on the right side of the LP is omitted, but the light intensity value on the right side is substantially equal to the light intensity value on the left side. FIG. 10C shows a simple free-form surface (a special free-form surface is a part of the second light distribution patterns LSP3 and RSP3 (second light distribution pattern) from the spheroid of the second reflecting surface of the second reflector. A part located above the cut-off lines LCL and RCL of the LSP and RSP, which is likely to cause glare, and is specially removed to remove the hatched part in FIG. It is explanatory drawing which shows the 2nd light distribution pattern LSP4 and RSP4 formed by (it is a special free-form surface designed), and the light distribution pattern LP for passing. Note that a two-dot chain line in the second light distribution pattern LSP4 on the left side in FIG. 10C shows an isoluminous curve. FIG. 10 (D) is an explanatory diagram showing the light intensity value along the alternate long and short dash line (horizontal line passing through the elbow point E) in FIG. 10 (C), where the vertical axis indicates the light intensity value, and the light intensity value increases toward the top. Get higher. In FIG. 10D, the light intensity values of the left part of the left second light distribution pattern LSP4 and the passing light distribution pattern LP are shown, and the right second light distribution pattern RSP4 and the passing light distribution pattern are shown. The light intensity value on the right side of the LP is omitted, but the light intensity value on the right side is substantially equal to the light intensity value on the left side.

  As shown in FIGS. 10 (A) and 10 (B), the second reflecting surfaces 11L and 11R formed by the elliptically reflecting surfaces of the second reflectors 6L and 6R of the vehicle headlamp 1 in the first embodiment are used. Second reflection of the light distribution patterns LSP, RSP and the simple elliptical reflection surface of the second reflector (the same elliptical reflection surface as the second reflectors 6L, 6R of the vehicle headlamp 1 in the first embodiment). The light intensity value of the second light distribution pattern formed by the surface gradually increases from the left side to the right side, and sufficient light intensity is obtained to visually recognize the left and right outer sides of the passing light distribution pattern LP. However, when a simple second reflector is used, in this case, as described above, due to the distortion of the projection lens 5, the second light distribution pattern LP on the left and right sides of the passing light distribution pattern LP as shown in FIG. Since the light distribution patterns LSP3 and RSP3 are respectively irradiated, a part of the second light distribution patterns LSP3 and RSP3 (the hatched portion in FIG. 10A, the second light distribution pattern LSP , RSP cut-off lines LCL and a part located above RCL) may cause glare.

  Here, in order to prevent the glare, a special free-form surface is designed from a spheroid of the second reflecting surface of the second reflector. With this free-form surface, as shown in FIG. 10C, cut-off lines LCL1 and RCL1 along the cut-off lines CL3 and CL1 of the passing light distribution pattern LP are formed on the second light distribution patterns LSP4 and RSP4 to prevent glare. can do. However, since this free-form surface requires a complicated design, the cost becomes high, and as shown in FIGS. 10C and 10D, the left and right outer sides of the passing light distribution pattern LP are visually recognized. Insufficient brightness is obtained. Moreover, as shown in FIG. 10D, the difference between the light intensity of the passing light distribution pattern LP and the light intensity of the second light distribution patterns LSP4 and RSP4 (that is, the light intensity value of the passing light distribution pattern LP and the second light distribution value). Since the difference in level between the light patterns LSP4 and RSP4 is large, there is a risk that the driver will feel uncomfortable.

  Therefore, the vehicle headlamp 1 according to the first embodiment is designed by using the second reflectors 6L and 6R in which the lower portion of the reflector is simply cut and the edges 16L and 16R are provided at the lower portion. Since the second reflecting surfaces 11L and 11R of the ellipsoidal reflecting surface which is simpler than a special free-form surface are used, glare in the case of the second reflecting surface of the elliptically reflecting surface of the reflector can be surely prevented, and the glare can be prevented. Insufficient light intensity in the case of a special free-form surface for prevention can be prevented, and sufficient light intensity can be obtained to visually recognize the left and right outer sides of the passing light distribution pattern LP. Moreover, as shown in FIG. 10B, the difference between the light intensity of the passing light distribution pattern LP and the light intensity of the second light distribution patterns LSP and RSP (that is, the light intensity value of the passing light distribution pattern LP and the second light distribution). Since the light level difference between the light patterns LSP and RSP) is small and smooth, it can contribute to traffic safety without giving a driver a sense of incongruity. Thereby, the vehicle headlamp 1 according to the first embodiment can maintain the high luminous intensity (high illuminance) of the second light distribution patterns LSP and RSP.

  In the vehicle headlamp 1 according to the first embodiment, the cut-off line RCL of the right second light distribution pattern RSP is along the lower horizontal cut-off line CL1 on the opposite lane side of the first light distribution pattern LP, and the left The cut-off line LSL of the two light distribution patterns LSP is along the upper horizontal cut-off line CL3 on the own lane side of the first light distribution pattern LP or below the upper horizontal cut-off line CL3 (slightly below the horizontal line HL-HR on the left and right of the screen) Located in. Therefore, in the vehicle headlamp 1 according to the first embodiment, the first light distribution pattern LP has a lower horizontal cutoff line CL1 on the opposite lane side, an oblique cutoff line CL2 at the center, and an upper horizontal cutoff line CL3 on the own lane side. Even in the case of the light distribution pattern having the above, that is, the first light distribution pattern LP, the cut-off lines RCL and LCL are formed along the lower horizontal cut-off line CL1 and the upper horizontal cut-off line CL3. The glare can be more reliably prevented by the two light distribution patterns RSP and LSP.

  FIG. 11 is a horizontal sectional view (transverse sectional view) showing a second embodiment of a vehicle headlamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 10 denote the same components.

  In the vehicle headlamp 1A according to the second embodiment, the basic ellipses EL and ER of free curves constituting a horizontal sectional shape including the optical axes ZZ of the left and right second reflecting surfaces 11L and 11R are divided into left and right. Yes. That is, the second focal point F20L of the second reflecting surface 11L on the left side is located on the second reflecting surface 11L side on the left side of the optical axis ZZ of the first reflecting surface 7 in the projection lens 5. On the other hand, the second focal point F20R of the second reflection surface 11R on the right side is located on the second reflection surface 11R side on the right side of the optical axis ZZ of the first reflection surface 7 in the projection lens 5. As a result, the major axis of the basic ellipse EL constituting the second reflecting surface 11L on the left side (the optical axis of the second reflecting surface 11L on the left side) is on the left side of the optical axis ZZ of the first reflecting surface 7. Is located on the second reflecting surface 11L side. On the other hand, the long axis of the basic ellipse ER (the optical axis of the right second reflecting surface 11R) constituting the second reflecting surface 11R on the right side is on the right side of the optical axis ZZ of the first reflecting surface 7. Located on the second reflecting surface 11R side.

  The vehicular headlamp 1A according to the second embodiment can achieve substantially the same operational effects as the vehicular headlamp 1 according to the first embodiment.

  In particular, since the vehicle headlamp 1A according to the second embodiment can separately configure the left and right second reflecting surfaces 11L and 11R, the left and right second reflecting surfaces 11L and 11R can be obtained from the left and right second reflecting surfaces 11L and 11R. The second light distribution patterns LSP and RSP can be controlled separately, and the degree of freedom of light distribution design is improved accordingly.

  FIG. 12 is a vertical sectional view (longitudinal sectional view) showing Embodiment 3 of the vehicle headlamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 11 denote the same components.

  In the vehicle headlamp 1 according to the third embodiment, the shade 4 reflects the reflected light L3 from the first reflecting surface 7 toward the projection lens 5 with the first light distribution pattern LP and the traveling light distribution pattern HP shown in FIG. Is a shade for switching to a plurality (two) of beams. The posture of the shade 4 is a posture (a posture indicated by a two-dot chain line in FIG. 12) from which the beam of the first light distribution pattern LP is obtained, and a posture (FIG. 12) from which the beam of the traveling light distribution pattern HP is obtained. A posture indicated by a solid line in the figure), and a drive device 17 composed of a solenoid or the like for switching to.

  Since the vehicle headlamp 1 according to the third embodiment is configured as described above, when the attitude of the shade 4 is switched to the attitude indicated by the two-dot chain line in FIG. As described above, the first light distribution pattern LP and the second light distribution patterns LSP and RSP irradiated on the left and right sides of the first light distribution pattern LP are obtained. Further, when the posture of the shade 4 is switched to the posture shown by the solid line in FIG. 12, as shown in FIG. 15, the traveling light distribution pattern HP and the second left and right sides of the traveling light distribution pattern HP are irradiated. Light distribution patterns LSP and RSP are obtained, respectively.

  Since the vehicular headlamp 1 according to the third embodiment is configured and operated as described above, the first light distribution pattern LP and the travel light distribution pattern HP can be obtained by switching the attitude of the shade 4 by the driving device 17. And is obtained. Moreover, the vehicular headlamp 1 according to the third embodiment has the left and right sides of the first light distribution pattern LP and the left and right sides of the traveling light distribution pattern HP by the second reflecting surfaces 11L and 11R of the second reflectors 6L and 6R. The second light distribution patterns LSP and RSP having the cut-off lines LCL and RCL along the cut-off lines CL3 and CL1 of the first light distribution pattern LP are irradiated on both sides. For this reason, the vehicular headlamp 1 according to the third embodiment has a wide range of left and right in the vicinity of the vehicle, like the first light distribution pattern LP, even in the case of the travel light distribution pattern HP. Can be illuminated.

  FIG. 13 is a vertical sectional view (longitudinal sectional view) showing Embodiment 4 of the vehicle headlamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 12 denote the same components.

  In the vehicular headlamp 1 according to the fourth embodiment, similarly to the vehicular headlamp 1 according to the third embodiment, the shade 4 emits the reflected light L3 from the first reflecting surface 7 toward the projection lens 5. The shade 4 is switched to a plurality (two) of beams from which the first light distribution pattern LP and the travel light distribution pattern HP shown in FIG. 16 are obtained. Further, similarly to the vehicle headlamp 1 according to the third embodiment, the posture of the shade 4 is set to a posture (a posture indicated by a two-dot chain line in FIG. 13) from which the beam of the first light distribution pattern LP is obtained. ) And a posture (a posture shown by a solid line in FIG. 13) from which the beam of the light distribution pattern for traveling HP is obtained is provided. Further, the shade 4 and the second reflectors 6L and 6R are connected by a connecting member 18, and the second reflectors 6L and 6R are interlocked with the shade 4 so that the left and right sides of the first light distribution pattern LP shown in FIG. FIG. 16 shows an attitude (attitude indicated by a two-dot chain line in FIG. 13) from which second light distribution patterns LSP and RSP having cut-off lines LCL and RCL along the cut-off lines CL3 and CL1 of the first light distribution pattern LP are obtained. The light distribution pattern different from the second light distribution pattern LSP, RSP on the left and right sides of the traveling light distribution pattern HP shown in FIG. (That is, the light distribution pattern positioned above the second light distribution pattern LSP, RSP) ) To obtain the second light distribution pattern LSP1 and RSP1 (attitude shown by a solid line in FIG. 13).

  Since the vehicular headlamp 1 according to the fourth embodiment is configured as described above, the driving device 17 indicates the posture of the shade 4 and the postures of the second reflectors 6L and 6R with two-dot chain lines in FIG. When switched to the posture, as shown in FIG. 1, the first light distribution pattern LP and the second light distribution patterns LSP and RSP irradiated to the left and right sides of the first light distribution pattern LP are obtained. Further, when the posture of the shade 4 and the postures of the second reflectors 6L and 6R are switched to the postures indicated by the solid lines in FIG. 13, as shown in FIG. 16, the light distribution pattern HP for travel and the light distribution pattern HP for travel are shown. The second light distribution patterns LSP1 and RSP1 that are irradiated on both the left and right sides are respectively obtained.

  Since the vehicular headlamp 1 according to the fourth embodiment is configured and operated as described above, the drive device 17 switches the attitude of the shade 4 and the attitudes of the second reflectors 6L and 6R, thereby providing the first light distribution. A pattern LP and a running light distribution pattern HP are obtained. Moreover, in the vehicle headlamp 1 according to the fourth embodiment, the first light distribution pattern LP is cut on both the left and right sides of the first light distribution pattern LP by the second reflecting surfaces 11L and 11R of the second reflectors 6L and 6R. The second light distribution patterns LSP and RSP having the cutoff lines LCL and RCL along the offline lines CL3 and CL1 are irradiated. Further, the second light distribution patterns LSP1 and RSP1 (which are different from the second light distribution patterns LSP and RSP irradiated on the left and right sides of the first light distribution pattern LP on the left and right sides of the traveling light distribution pattern HP The second light distribution patterns LSP and RSP) are irradiated. For this reason, the vehicular headlamp 1 according to the fourth embodiment has a wide range of left and right in the vicinity of the vehicle, similar to the first light distribution pattern LP, even in the case of the travel light distribution pattern HP. Can be illuminated.

  FIG. 14 is a vertical sectional view (longitudinal sectional view) showing Embodiment 4 of the vehicle headlamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 13 denote the same components.

  The vehicular headlamp 1 according to the fifth embodiment has a shade 4 similar to the vehicular headlamp 1 according to the third embodiment and the vehicular headlamp 1 according to the fourth embodiment. The shade 4 switches the reflected light L3 from the first reflecting surface 7 toward the projection lens 5 into a plurality of (two) beams from which the first light distribution pattern LP and the traveling light distribution pattern HP shown in FIG. 17 are obtained. Further, the posture of the shade 4 is set such that the beam of the first light distribution pattern LP is obtained around the shaft member 19 (the posture indicated by a two-dot chain line in FIG. 14), and the light distribution pattern HP for traveling. And a drive device 17 composed of a solenoid or the like for switching to a posture (a posture indicated by a solid line in FIG. 14). Further, the shade 4 and the second reflectors 6L and 6R are connected by a connecting member, and the second reflectors 6L and 6R are linked to the shade 4 and the shaft member 19 is used as a center to show the first arrangement shown in FIG. The posture (shown by a two-dot chain line in FIG. 14) in which second light distribution patterns LSP and RSP having cut-off lines LCL and RCL along the cut-off lines CL3 and CL1 of the first light distribution pattern LP are obtained on both the left and right sides of the light pattern LP. Posture) and light distribution patterns different from the second light distribution patterns LSP and RSP on the left and right sides of the traveling light distribution pattern HP shown in FIG. 17 (that is, oblique to the second light distribution patterns LSP and RSP). It is switched to the posture (the posture shown by the solid line in FIG. 14) from which the second light distribution patterns LSP2 and RSP2 of the upper light distribution pattern) are obtained.

  Since the vehicular headlamp 1 according to the fifth embodiment is configured as described above, the driving device 17 causes the attitude of the shade 4 and the attitudes of the second reflectors 6L and 6R to be centered on the shaft member 19 in FIG. Are switched to the posture indicated by the two-dot chain line, as shown in FIG. 1, the first light distribution pattern LP and the second light distribution patterns LSP and RSP irradiated on the left and right sides of the first light distribution pattern LP, Are obtained respectively. Further, when the posture of the shade 4 and the posture of the second reflectors 6L and 6R are switched to the posture shown by the solid line in FIG. 13 with the shaft member 19 as the center, as shown in FIG. 17, the traveling light distribution pattern HP and its Second light distribution patterns LSP2 and RSP2 that are irradiated on the left and right sides of the traveling light distribution pattern HP are obtained.

  Since the vehicular headlamp 1 according to the fifth embodiment is configured and operated as described above, the driving device 17 switches the attitude of the shade 4 and the attitudes of the second reflectors 6L and 6R around the shaft member 19. Thus, the first light distribution pattern LP and the travel light distribution pattern HP are obtained. Moreover, in the vehicle headlamp 1 according to the fifth embodiment, the first light distribution pattern LP is cut on both the left and right sides of the first light distribution pattern LP by the second reflecting surfaces 11L and 11R of the second reflectors 6L and 6R. The second light distribution patterns LSP and RSP having the cutoff lines LCL and RCL along the offline lines CL3 and CL1 are irradiated. Further, the second light distribution patterns LSP2 and RSP2 (which are different from the second light distribution patterns LSP and RSP irradiated to the left and right sides of the first light distribution pattern LP on the left and right sides of the traveling light distribution pattern HP) The second light distribution pattern LSP, the light distribution pattern located obliquely above the RSP) is irradiated. For this reason, the vehicular headlamp 1 according to the fifth embodiment has a wide range of left and right in the vicinity of the vehicle, even in the case of the light distribution pattern HP for travel, similarly to the first light distribution pattern LP. Can be illuminated.

  In the first, second, third, fourth, and fifth embodiments, the passing light distribution pattern LP will be described as a predetermined first light distribution pattern having a cut-off line. However, in the present invention, as the predetermined first light distribution pattern having a cut-off line, a light distribution pattern other than the passing light distribution pattern LP, for example, a motorway (high-speed) light distribution pattern, a fog light distribution pattern, etc. It may be.

  In Examples 3, 4, and 5, the predetermined first light distribution pattern (passing light distribution pattern LP) and the traveling light distribution pattern HP are obtained. However, in the present invention, a light distribution pattern other than the predetermined first light distribution pattern (passing light distribution pattern LP) and the travel light distribution pattern HP, for example, a motorway (high speed) light distribution pattern or fog A light distribution pattern or the like may be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows Example 1 of the vehicle headlamp concerning this invention, Comprising: The 2nd light distribution pattern obtained by the reflection effect of a right-and-left 2nd reflective surface and the passing obtained by the reflective effect of a 1st reflective surface It is explanatory drawing which shows the light distribution pattern for lights. Similarly, it is a perspective view of the principal part. Similarly, it is a front view of the principal part. It is the IV-IV sectional view taken on the line in FIG. 3 (a horizontal sectional view, a transverse sectional view). It is the VV sectional view taken on the line in FIG. 3 (a vertical sectional view, a longitudinal sectional view). It is the VI-VI sectional view (vertical sectional view, longitudinal sectional view) in FIG. Similarly, it is horizontal cross-sectional explanatory drawing (transverse cross-sectional explanatory drawing) which shows the reflection effect of the 2nd reflective surface of right and left. Similarly, it is a horizontal cross-sectional explanatory drawing (transverse cross-sectional explanatory drawing) showing the reflecting action of the first reflecting surface. Similarly, it is horizontal cross-sectional explanatory drawing (transverse cross-sectional explanatory drawing) which shows the reflective effect | action of a 2nd reflective surface on either side, and the reflective effect | action of a 1st reflective surface. Similarly, it is explanatory drawing which shows the 2nd light distribution pattern when not providing an edge in the lower part of a 2nd reflector, and the light distribution pattern for passing. It is a horizontal sectional view (transverse sectional view) showing Example 2 of the vehicle headlamp according to the present invention. It is a vertical sectional view (longitudinal sectional view) showing Embodiment 3 of the vehicle headlamp according to the present invention. It is a vertical sectional view (longitudinal sectional view) showing Embodiment 4 of the vehicle headlamp according to the present invention. It is a vertical sectional view (longitudinal sectional view) showing Embodiment 5 of the vehicle headlamp according to the present invention. It is explanatory drawing which shows the 2nd light distribution pattern obtained with the vehicle headlamp of Example 3 shown in FIG. 12, and the light distribution pattern for passing. It is explanatory drawing which shows the 2nd light distribution pattern obtained with the vehicle headlamp of Example 4 shown in FIG. 13, and the light distribution pattern for passing. It is explanatory drawing which shows the 2nd light distribution pattern obtained with the vehicle headlamp of Example 5 shown in FIG. 14, and the light distribution pattern for passing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Vehicle headlamp 2 1st reflector 3 Discharge lamp (light source)
4 Shade 5 Projection lens (Condenser lens)
6L, 6R Second reflector 7 First reflecting surface 8 Socket mechanism 9 Light emitting portion 10 Lower horizontal edge 11L, 11R Second reflecting surface 12 Through hole 13 Upper horizontal edge 14 Diagonal edge 15 Elbow point 16L, 16R Edge 17 Solenoid (drive device) )
18 connecting member 19 shaft member LP light distribution pattern for passing (predetermined first light distribution pattern)
CL1 Lower horizontal cut line CL2 Oblique cut-off line CL3 Upper horizontal cut-off line HP Travel light distribution pattern LSP, RSP, LSP1, RSP1, LSP2, RSP2, LSP3, RSP3 Second light distribution pattern LCL, RCL Cut second light distribution pattern Offline F1 First focal point of first reflecting surface F2 Second focal point of first reflecting surface F10 First focal point of second reflecting surface F20, F20L, F20R Second focal point of second reflecting surface EL, ER Basic ellipse ZZ First 1. Optical axis of the reflecting surface (lamp axis, long axis of basic ellipse)
ZL-ZL, ZR-ZR Long axis of basic ellipse L1 Light from discharge lamp (usually effective light)
Light from L2 discharge lamp (normally invalid light)
L3 Reflected light from the first reflective surface L4 Reflected light from the first reflective surface not cut off by the shade L5 Reflected light from the second reflective surface VU-VD Vertical vertical line HL-HR Horizontal horizontal line

Claims (4)

In projector-type vehicle headlamps,
A first reflector having a first reflective surface of an elliptical reflective surface;
A light source disposed at or near the first focal point of the first reflecting surface;
A part of the reflected light that is disposed at or near the second focal point of the first reflecting surface and is reflected by the first reflecting surface is cut off, and the remaining reflected light is allowed to pass through. A shade forming a first light distribution pattern having a cut-off line;
A projection lens that is disposed in front of the second focal point of the first reflecting surface and the shade, and projects the first light distribution pattern to the outside front;
An ellipsoidal reflecting surface having a first focal point located at or near the light source and a second focal point located at or near the projection lens, and reflects the light from the light source toward the projection lens, thereby projecting the projection lens. A left second reflection surface and a right second reflection surface that irradiate the left and right sides of the first light distribution pattern as a second light distribution pattern on the left side and a second light distribution pattern on the right side through the first light distribution pattern,
The left second reflecting surface and the right second reflecting surface are provided, and the left second reflector and the right second reflecting surface are disposed on both the left and right sides between the first reflector and the projection lens. A reflector,
With
The lower portion of the second reflector on the left side and the lower portion of the second reflector on the right side follow the cut-off line of the first light distribution pattern along the second light distribution pattern on the left side and the second light distribution pattern on the right side. An edge forming a cut-off line is provided,
A vehicle headlamp characterized by that. The first light distribution pattern is a light distribution pattern having a lower horizontal cutoff line on the opposite lane side, a central oblique cutoff line, and an upper horizontal cutoff line on the own lane side,
The cut-off line of either the second light distribution pattern on the left side or the second light distribution pattern on the right side is along the lower horizontal cut-off line,
The other cut-off line of the left second light distribution pattern or the right second light distribution pattern is located along the upper horizontal cut-off line or below the upper horizontal cut-off line.
The vehicle headlamp according to claim 1. The shade is a shade that switches reflected light from the first reflecting surface toward the projection lens into a plurality of beams from which the first light distribution pattern and at least the travel light distribution pattern can be obtained,
A drive device that switches the shade posture to a plurality of postures from which the plurality of beams can be obtained;
The vehicle headlamp according to claim 1 or 2, characterized in that The left second reflector and the right second reflector are switched to a plurality of postures in conjunction with the shade.
The vehicular headlamp according to claim 3.

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