WO2020218085A1 - 車両用前照灯 - Google Patents

車両用前照灯 Download PDF

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Publication number
WO2020218085A1
WO2020218085A1 PCT/JP2020/016404 JP2020016404W WO2020218085A1 WO 2020218085 A1 WO2020218085 A1 WO 2020218085A1 JP 2020016404 W JP2020016404 W JP 2020016404W WO 2020218085 A1 WO2020218085 A1 WO 2020218085A1
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WO
WIPO (PCT)
Prior art keywords
light source
reflector
focal point
reflecting surface
low beam
Prior art date
Application number
PCT/JP2020/016404
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
貴志 芥川
良昭 秋山
達也 関口
克司 大野
Original Assignee
スタンレー電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by スタンレー電気株式会社 filed Critical スタンレー電気株式会社
Priority to CN202080029831.5A priority Critical patent/CN113728195B/zh
Publication of WO2020218085A1 publication Critical patent/WO2020218085A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources

Definitions

  • the present invention relates to vehicle headlights.
  • This application claims priority based on Japanese Patent Application No. 2019-081103 filed on April 22, 2019, the contents of which are incorporated herein by reference.
  • saddle-type vehicles such as motorcycles and tricycles.
  • the headlamps for vehicles mounted in the center of the front side of a saddle-mounted vehicle have a passing beam (low beam) that forms a low-beam light distribution pattern including a cut-off line at the upper end, similar to a motorcycle.
  • the traveling beam (high beam) that forms the high beam light distribution pattern above the low beam light distribution pattern are radiated in a switchable manner toward the front of the vehicle (vehicle traveling direction).
  • the vehicle headlights mounted on such saddle-type vehicles have a low beam light source and a high beam light source inside a lamp body composed of a housing having an open front surface and a lens cover covering the opening of the housing. And a reflector are arranged, and the light emitted from each light source is reflected by the reflector and irradiated toward the front of the vehicle (see, for example, Patent Document 1 below).
  • the low beam light source and the high beam light source are separately arranged inside the lamp body, and the reflectors arranged according to the respective light sources are used.
  • the low beam and high beam are emitted from different positions toward the front of the vehicle.
  • the reflector is composed of a rotating paraboloid reflecting surface whose focal point is the center (light emitting point) of the light source so as to surround the periphery of the light source except in front of it.
  • the reflector reflects the light emitted from the light source toward the front of the vehicle while collimating in the vertical direction.
  • aspects of the present invention provide vehicle headlights with high light utilization efficiency.
  • a vehicle headlight that illuminates the front of a vehicle by freely switching between a low beam and a high beam.
  • a light source unit including at least a low beam light source that emits light that becomes the low beam and a high beam light source that emits the high beam light.
  • a first reflector which is arranged in front of the light source unit and reflects the light emitted from the light source unit toward the periphery of the light source unit, It is provided with a second reflector which is arranged around the light source unit and reflects the light reflected by the first reflector toward the front of the vehicle.
  • the first reflector includes a spheroidal reflecting surface.
  • the second reflector includes a rotating parabolic reflector.
  • the first focal point of the spheroidal reflecting surface is located on the light emitting surface of the low beam light source.
  • a vehicle headlight in which the second focal point of the spheroidal reflecting surface and the focal point of the rotating parabolic reflecting surface coincide with each other.
  • the first reflector includes a pair of spheroidal reflecting surfaces that are symmetrical with respect to the optical axis of light emitted from the low beam light source. Of the pair of spheroidal reflecting surfaces, the first focal point of the first spheroidal reflecting surface and the first focal point of the second spheroidal reflecting surface are in the width direction with the center of the light emitting surface of the low beam light source interposed therebetween.
  • the second focal point of the first spheroidal reflecting surface and the second focal point of the second spheroidal reflecting surface are located at positions that coincide with each other in the front-rear direction and the vertical direction.
  • the second focal point of the first spheroidal reflecting surface and the second focal point of the second spheroidal reflecting surface are located at overlapping positions with each other.
  • the light emitting surface of the low beam light source has a rectangular shape.
  • the first focal point of the first spheroidal reflecting surface and the first focal point of the second spheroidal reflecting surface are located at the upper corners of the light emitting surface of the low beam light source, either [2] or [3].
  • the pair of rotating elliptical reflecting surfaces form a reflecting region divided across a dividing line in the left-right direction orthogonal to a center line in the vertical direction passing through the optical axis of the light emitted from the low beam light source.
  • the vehicle headlight according to the aspect of [5] above.
  • the second reflector is a vehicle headlight according to the embodiment [5] or [6], which is arranged below or above the light source unit.
  • the first reflector includes a central spheroidal reflecting surface arranged between the pair of spheroidal reflecting surfaces.
  • the first focal point of the central spheroidal reflecting surface is between the first focal point of the first spheroidal reflecting surface on the light emitting surface of the low beam light source and the first focal point of the second spheroidal reflecting surface.
  • the light emitting surface of the low beam light source has a rectangular shape and has a rectangular shape.
  • the spheroidal reflection surface includes a reflection region symmetrically divided across a center line in the vertical direction passing through the optical axis of light emitted from the low beam light source [8] to [10].
  • the second reflector is a vehicle headlight according to any one of the above [8] to [12], which is symmetrically arranged on both sides in the width direction of the light source unit.
  • the second reflector has a light diffusing shape that reflects light incident on the rotating parabolic reflection surface while diffusing it in the width direction of the vehicle.
  • Vehicle headlights according to the section.
  • the light source unit is inserted into the inside of the lamp body through a mounting hole provided on the back surface side of the lamp body in which the first reflector and the second reflector are housed.
  • the vehicle headlight according to any one of the above [1] to [14], which is composed of a socket with a coupler that is detachably attached to the periphery of the headlight.
  • FIG. 5 is a perspective perspective view showing a first reflector and a light source unit included in the vehicle headlight shown in FIG. 1. It is a top view which shows the position of the 1st focal point of a pair of spheroidal reflecting surfaces which make up a 1st reflector, and the light emitting surface of a low beam light source and a high beam light source which make up a light source unit.
  • 6A is a light source image obtained by synthesizing the light source images shown in FIGS.
  • FIG. 6A to 6D It is a perspective perspective view which shows the 1st reflector and a light source unit to be compared.
  • FIG. 5 is a plan view showing the positions of the first focal point of the spheroidal reflecting surface constituting the first reflector shown in FIG. 7 and the light emitting surfaces of the low beam light source and the high beam light source constituting the light source unit.
  • It is a schematic diagram which shows the light source image of the light when the 1st reflector shown in FIG. 7 is used.
  • It is a front view which shows the structure of the headlight for a vehicle which concerns on 2nd Embodiment of this Embodiment. It is sectional drawing of the headlight for a vehicle by the line segment XI-XI shown in FIG. FIG.
  • FIG. 5 is a perspective perspective view showing a first reflector and a light source unit included in the vehicle headlight shown in FIG. 10.
  • FIG. 5 is a plan view showing the positions of the first focal points of the pair of spheroidal reflecting surfaces and the central spheroidal reflecting surface constituting the first reflector, and the light emitting surfaces of the low beam light source and the high beam light source constituting the light source unit. ..
  • It is a schematic diagram which shows the light source image of the light reflected by one spheroidal reflection surface.
  • It is a schematic diagram which shows the light source image of the light reflected by the spheroidal reflection surface in the center.
  • It is a schematic diagram which shows the light source image of the light reflected by the other spheroidal reflection surface.
  • FIG. 5 is a plan view showing the positions of the first focal point of the spheroidal reflecting surface constituting the first reflector shown in FIG. 15 and the light emitting surfaces of the low beam light source and the high beam light source constituting the light source unit. It is a schematic diagram which shows the light source image of the light when the 1st reflector shown in FIG. 15 is used.
  • FIG. 1 is a front view showing the configuration of the vehicle headlight 1A.
  • FIG. 2 is a cross-sectional view of the vehicle headlight 1A by the line segments II-II shown in FIG.
  • FIG. 3 is a cross-sectional view showing the configuration of the light source unit 5 included in the vehicle headlight 1A.
  • FIG. 4 is a perspective perspective view showing the first reflector 6 and the light source unit 5 included in the vehicle headlight 1A.
  • FIG 5 shows the first focal points F1a and F1b of the pair of spheroidal reflecting surfaces 6a and 6b constituting the first reflector 6, and the light emitting surfaces 8a of the low beam light source 8 and the high beam light source 9 constituting the light source unit 5. It is a top view which shows the position with 9a.
  • the XYZ Cartesian coordinate system is set, the X-axis direction is the front-rear direction (length direction) of the vehicle headlight 1A, and the Y-axis direction is the left-right direction (width) of the vehicle headlight 1A.
  • Direction) and Z-axis direction shall be indicated as the vertical direction (height direction) of the vehicle headlight 1A, respectively.
  • the vehicle headlight 1A of the present embodiment is, for example, among the saddle-type vehicle lighting fixtures mounted on the front center of a saddle-type vehicle (not shown) such as a motorcycle or a three-wheeled vehicle.
  • the present invention is applied to a headlamp that irradiates a headlamp that freely switches between a low beam and a high beam toward the front.
  • front means that the vehicle headlight 1A is viewed from the front (front of the vehicle) unless otherwise specified. It shall mean each direction at the time.
  • the vehicle headlight 1A of the present embodiment is a lamp body 4 composed of a housing 2 having an open front surface and a transparent lens cover 3 covering the opening of the housing 2. It has.
  • the shape of the lamp body 4 can be appropriately changed according to the design of the saddle-mounted vehicle and the like.
  • the saddle-mounted vehicle lamp 1 includes a light source unit 5, a first reflector 6, and a second reflector 7 inside the lamp body 4.
  • the light source unit 5 is a socket with a coupler on which a low beam light source 8 and a high beam light source 9 are mounted, and is detachably attached to a mounting hole 10 provided on the back side of the lamp body 4. ing.
  • the light source unit 5 has a plurality of claws 11 that prevent the mounting holes 10 from coming off, and is mounted on the outer periphery thereof by rotating the front side thereof in the circumferential direction while fitting the front side into the mounting holes 10. It is detachably attached around the attachment hole 10 via a ring-shaped packing (O-ring) 12.
  • O-ring ring-shaped packing
  • the light source unit 5 is replaceably attached to the lamp body 4. Therefore, for example, even if a problem occurs in the low beam light source 8 or the high beam light source 9, only the light source unit 5 needs to be replaced.
  • the vehicle headlight 1A of the present embodiment by providing the light source unit 5 constituting such a socket with a coupler, it is possible to improve workability in maintenance and the like and reduce the cost required for maintenance and the like. Is.
  • the light source unit 5 is provided with a first substrate 13 on which low beam and high beam light sources 8 and 9 are mounted, and a second substrate 14 provided with a drive circuit 14 for driving the light sources 8 and 9.
  • a substrate 15 a first housing 17 provided with a heat radiating portion 16 that dissipates heat generated by each of the light sources 8 and 9, and a connector portion that is electrically connected to the first substrate 13 and the second substrate 14. It is provided with a second housing 19 provided with 18.
  • the low beam and high beam light sources 8 and 9 consist of, for example, LEDs that emit white light. Further, as the LED, a high output (high brightness) type LED (for example, SMD LED) for vehicle lighting can be used.
  • a high output (high brightness) type LED for example, SMD LED
  • the low beam light source 8 has a rectangular (horizontally long rectangular shape in this embodiment) light emitting surface 8a, and is mounted on the front surface side of the first substrate 13.
  • the low beam light source 8 radiates light that becomes a passing beam (low beam) that forms a low beam light distribution pattern including a cut-off line at the upper end toward the front of the vehicle.
  • the high beam light source 9 has a rectangular (horizontally long rectangular shape in this embodiment) light emitting surface 9a, and is mounted on the front surface side of the first substrate 13. Further, the high beam light source 9 is arranged above the low beam light source 8. The high beam light source 9 radiates light that becomes a traveling beam (high beam) that forms a high beam light distribution pattern above the low beam light distribution pattern toward the front of the vehicle.
  • a traveling beam high beam
  • the low beam and high beam light sources 8 and 9 may emit light in a radial manner, and in addition to the above-mentioned LEDs, for example, a light emitting element such as a laser diode (LD) can be used. is there. Further, the color of the light emitted by the low beam and high beam light sources 8 and 9 is not limited to the white light described above, and can be changed to, for example, yellow light.
  • a light emitting element such as a laser diode (LD)
  • LD laser diode
  • the color of the light emitted by the low beam and high beam light sources 8 and 9 is not limited to the white light described above, and can be changed to, for example, yellow light.
  • the first substrate 13 is a rectangular flat-plate-shaped printed wiring board (PWB), and is a wiring (not shown) electrically connected to one surface (surface) of an insulating substrate with light sources 8 and 9 for low beam and high beam. ) Is provided on a single-sided wiring board.
  • PWB printed wiring board
  • the first substrate 13 is provided with a plurality of first hole portions 13a penetrating in the thickness direction.
  • the first hole portion 13a is a portion into which the lead terminal 18a of the connector portion 18 described later is inserted, and the periphery of the first hole portion 13a is electrically connected to the light sources 8 and 9 described above. Lands (not shown) that form part of the wiring are provided.
  • the second substrate 15 is a rectangular printed circuit board (PCB) larger than the first substrate 13, and mounting components (not shown) constituting the drive circuit 14 are mounted on the above-mentioned PWB. It has a structure.
  • the second substrate 15 is composed of a single-sided or double-sided wiring board provided with wiring (not shown) electrically connected to the mounting component on at least one surface (front surface) or both sides (front surface and back surface) of the insulating substrate. ..
  • the second substrate 15 is provided with a plurality of second holes 15a penetrating in the thickness direction.
  • the second hole portion 15a is a portion into which the lead terminal 18a of the connector portion 18 to be described later is inserted, and around the second hole portion 15a, the mounting components constituting the drive circuit 14 described above and electrical components are electrically connected. Lands (not shown) are provided to form part of the wiring connected to.
  • the first housing 17 has a substantially circular flat plate-shaped front wall portion 17a, a substantially cylindrical peripheral wall portion 17b that surrounds the front side and the back surface side of the front wall portion 17a, and a diameter from the back side of the peripheral wall portion 17b. It has a substantially annular flat plate-shaped enlarged diameter portion 17c protruding in the radial direction, and a substantially cylindrical extension portion 17d surrounding the periphery of the enlarged diameter portion 17c on the back surface side. Further, on the back surface of the enlarged diameter portion 17c, a fitting convex portion 17e having a substantially rectangular tubular shape with rounded four corners is provided so as to project. The plurality of claw portions 11 are provided so as to project from the outer periphery of the peripheral wall portion 17b. The packing 12 is attached to the outer periphery of the enlarged diameter portion 17c.
  • the heat radiating unit 16 efficiently dissipates the heat generated by the light sources 8 and 9 to the outside, so that at least a part or all of the first housing 17 is made of a metal material or a resin material having high thermoconductivity, or a composite thereof. It is composed by using materials and the like. That is, the heat radiating unit 16 can have a structure in which a heat radiating member (heat sink) is attached to the first housing 17, or a structure in which the first housing 17 itself is a heat radiating member (heat sink).
  • the first housing 17 is provided with a plurality of third hole portions 17f penetrating the front wall portion 17a.
  • the third hole portion 17f has a diameter larger than that of the first hole portion 13a in order to penetrate the lead terminal 18a of the connector portion 18 described later in a non-contact state.
  • the third hole 17f does not necessarily have to be provided according to the number of lead terminals 18a, and is formed as one hole (opening) through which the plurality of lead terminals 18a penetrate in a non-contact state. Is also possible.
  • the second housing 19 has a substantially rectangular flat plate-shaped rear wall portion 19a with rounded four corners and a substantially rectangular tubular socket portion 19b located on the back side of the rear wall portion 19a with rounded four corners. I have. Further, on the front surface of the rear wall portion 19a, a fitting recess 19c having a substantially rectangular frame shape with rounded four corners is provided.
  • the second housing 19 has a pedestal portion 19d protruding from the front surface of the rear wall portion 19a.
  • the pedestal portion 19d is located at the central portion of the rear wall portion 19a, and forms a circular stepped surface in a plan view that is one step higher than the front surface of the rear wall portion 19a.
  • a columnar protrusion 19e is provided so as to project from the center of the pedestal portion 19d.
  • a fourth hole portion 15b through which the protrusion 19e is penetrated is provided in the central portion of the second substrate 15.
  • the connector portion 18 has a plurality of lead terminals 18a inside the socket portion 19b.
  • Each lead terminal 18a is integrally attached to the second housing 19 in a state of penetrating the rear wall portion 19a in the front-rear direction.
  • the plurality of lead terminals 18a have a lead terminal 19a that is relatively long on the front side of the rear wall portion 19a and a lead terminal 19a that is relatively short on the front side of the rear wall portion 9a.
  • the second substrate 15 is a pedestal by thermally caulking the tip of the protrusion 19e in a state where the protrusion 19e is penetrated through the fourth hole 15b. It is mounted on the stepped surface of the portion 19d.
  • the land around each of the second hole portions 15a and the lead terminal 18a are fixed by solder in a state where the lead terminal 18a is passed through each of the second hole portions 15a. By doing so, it is electrically connected to the lead terminal 18a.
  • the second substrate 15 is attached to the front side of the second housing 19.
  • the fitting convex portion 17e provided on the back side of the first housing 17 is fitted into the fitting recess 19c provided on the front side of the second housing 19 in a state of being fitted.
  • the fitting convex portion 17e fitted in the fitting recess 19c is fixed over the entire circumference by the adhesive S injected into the joint recess 19c.
  • the back side of the first housing 17 and the front side of the second housing 19 are integrally attached.
  • the second substrate 15 is arranged so as to face the back surface of the front wall portion 17a with a space in between, in a state of being in non-contact with the peripheral wall portion 17b of the first housing 17.
  • each of the third hole portions 14a penetrates the above-mentioned longer lead terminal 18a in a non-contact state.
  • the first substrate 13 is attached to the front surface of the front wall portion 17a using an adhesive having high thermal conductivity (not shown). Further, when the front wall portion 17a is made of a conductive material such as metal, the first substrate 13 is attached in a state of being electrically insulated from the first housing 17.
  • the first substrate 13 has a land around each first hole portion 13a and a longer lead terminal in a state where the longer lead terminal 18a is passed through each first hole portion 13a. By fixing the 18a with solder, it is electrically connected to the longer lead terminal 19a.
  • the longer lead terminal 19a of the plurality of lead terminals 19a supplies power to the light sources 8 and 9 and the drive circuit 14 of the wires provided on the first board 13 and the second board 15. It is electrically connected to the feed line and ground line for On the other hand, the shorter lead terminal 19a is electrically connected to the control line for transmitting the control signal to the drive circuit 14 among the wirings provided on the second substrate 15.
  • the first reflector 6 is arranged in front of the light source unit 5, and directs the light L emitted from the light source unit 5 toward the periphery of the light source unit 5. And reflect. Specifically, the first reflector 6 has a pair of spheroidal reflecting surfaces 6a and 6b that are symmetrical with respect to the optical axis of the light emitted from the low beam light source 8.
  • the pair of spheroidal reflecting surfaces 6a and 6b are concave reflecting surfaces obtained by rotating a part of an elliptical line having two focal points so as to surround the periphery of the light source unit 5 except below.
  • the first focal point F1a of one spheroidal reflecting surface 6a (first spheroidal reflecting surface 6a) and the other spheroidal reflecting surface 6b (second spheroidal reflecting surface 6b).
  • the first focal point F1b is located on both sides of the light emitting surface 8a of the low beam light source 8 in the width direction with the center in between.
  • the first focal point F1a of one spheroidal reflecting surface 6a and the first focal point F1b of the other spheroidal reflecting surface 6b are located at the upper corners of the light emitting surface 8a of the low beam light source 8. ing.
  • the pair of rotating elliptical reflecting surfaces 6a and 6b have four reflecting regions 61a with a dividing line in the horizontal direction orthogonal to the center line in the vertical direction passing through the optical axis of the light emitted from the low beam light source 8. , 62a, 61b, 62b.
  • one spheroidal reflection surface 6a is divided into a first reflection region 61a and a second reflection region 62a in the vertical direction.
  • the other spheroidal reflection surface 6b is divided into a third reflection region 61b and a fourth reflection region 62b in the vertical direction.
  • the first reflection region 61a and the third reflection region 61b are arranged symmetrically.
  • the second reflection region 62a and the fourth reflection region 62b are arranged symmetrically.
  • first reflection region 61a and the second reflection region 62a are arranged on the left and right sides opposite to each other. Further, the third reflection region 61b and the fourth reflection region 62b are arranged on the left and right sides opposite to each other. That is, the first reflection region 61a and the second reflection region 62a (and the first reflection region 61a and the second) which are a part of the same rotating elliptical reflection surfaces 6a and 6b in which the focal points F1a and F1b are aligned.
  • the third reflection region 61b and the fourth reflection region 62b which are a part of the rotating elliptical reflection surfaces 6a and 6b having the first focal points F1a and F1b at different positions from the reflection region 62a of the above, are centered in the vertical direction. It is located diagonally across the intersection of the line and the dividing line in the left-right direction.
  • the upper second reflection region 62a and the fourth reflection region 62b have a ray angle with respect to the optical axis of the light emitted from the low beam light source 8. Increasing light is incident.
  • the second focal point F2a of one spheroidal reflection surface 6a (first and second reflection regions 61a, 62a) and the other spheroidal reflection surface 6b (third and fourth reflection regions)
  • the second focal point F2b of 61b, 62b) is at a position coincident with each other.
  • the first reflector 6 concentrates the light L incident on the pair of spheroidal reflecting surfaces 6a and 6b toward the second focal points F2a and F2b that coincide with each other, and causes the second reflector 7 below. Reflect toward.
  • the second reflector 7 is arranged around the light source unit 5 and reflects the light L reflected by the first reflector 6 toward the front of the vehicle. Specifically, the second reflector 7 is arranged below the light source unit 5. Further, the second reflector 7 has a spheroidal parabolic surface 7a facing the pair of spheroidal paraboloids 6a and 6b of the first reflector 1.
  • the second reflector 7 is not limited to the configuration arranged below the light source unit 5 described above, but may be arranged above the light source unit 5. In that case, the first reflector 6 may be configured to reflect toward the upper second reflector 7.
  • the rotating parabolic reflecting surface 7a is a concave reflecting surface obtained by rotating a part of a parabola having the second focal points F2a and F2b of the rotating elliptical reflecting surfaces 6a and 6b that coincide with each other as the focal point F3. That is, the focal point F3 of the rotating parabolic reflecting surface 7a and the second focal points F2a and F2b of the pair of rotating elliptical reflecting surfaces 6a and 6b are at positions that coincide with each other.
  • the second reflector 7 reflects the light L incident on the rotating parabolic reflection surface 7a while collimating in the vertical direction toward the front of the vehicle.
  • the second reflector 7 has a light diffusion shape that reflects the light L incident on the rotating parabolic reflection surface 7a while diffusing it in the width direction of the vehicle. Specifically, the second reflector 7 controls the reflection direction of the light incident on each reflection region by forming a multi-reflector shape that divides the rotating parabolic reflection surface 7a into a plurality of reflection regions. It is possible to reflect the light L incident on the rotating parabolic reflection surface 7a while diffusing it in the width direction of the vehicle.
  • the light emitted from the low beam light source 8 is reflected by the first reflector 6 and the second reflector 7 as a passing beam (low beam). While irradiating toward the front of the vehicle. As a result, a low beam light distribution pattern including a cut-off line can be formed at the upper end.
  • the light emitted from the high beam light source 9 is reflected by the first reflector 6 and the second reflector 7 as the traveling beam (hyme) of the vehicle. Irradiate toward the front. As a result, the high beam light distribution pattern can be formed above the low beam light distribution pattern.
  • the vehicle headlight 1A of the present embodiment not only reduces the number of parts but also reduces the number of parts by providing the light source unit 5 constituting the socket with a coupler equipped with the above-mentioned low beam and high beam light sources 8 and 9. , It is possible to design the lamp body 4 more compactly.
  • the light L emitted from the light source unit 5 described above is reflected by the pair of spheroidal reflecting surfaces 6a and 6b of the first reflector 6 (first to fourth reflecting regions). 61a, 62a, 61b, 62b) efficiently reflects toward the second reflector 7, and this light L is efficiently reflected toward the front of the vehicle by the spheroidal paraboloid 7a of the second reflector 7. Can be done. This makes it possible to improve the utilization efficiency of the light L emitted from the light source unit 5.
  • the first focal point F1a of one spheroidal reflecting surface 6a and the first focal point F1b of the other spheroidal reflecting surface 6b described above are used by the low beam light source 8.
  • the low beam light source 8a By locating the light emitting surface 8a at both upper end corners, it is possible to form a low beam light distribution pattern including a cut-off line at the upper end without using a shade.
  • a light source image of light reflected by the four reflection regions 61a, 62a, 61b, 62b of the spheroidal reflection surfaces 6a, 6b constituting the first reflector 6 and a light source image obtained by synthesizing these light source images Is shown in FIGS. 6A to 6E.
  • FIG. 6A is a schematic view showing a light source image of the light reflected by the second reflection region 62a and the first focal point F1a of one spheroidal reflection surface 6a.
  • FIG. 6B is a schematic view showing a light source image of light reflected by the fourth reflection region 62b and a first focal point F1b of the other spheroidal reflection surface 6b.
  • FIG. 6C is a schematic view showing a light source image of light reflected by the first reflection region 61a and a first focal point F1a of one spheroidal reflection surface 6a.
  • FIG. 6D is a schematic view showing a light source image of light reflected by the third reflection region 61b and a first focal point F1b of the other spheroidal reflection surface 6b.
  • FIG. 6E is a light source image obtained by synthesizing the light source images shown in FIGS. 6A to 6D.
  • FIG. 7 is a perspective perspective view showing the first reflector 60 and the light source unit 5 to be compared.
  • FIG. 8 shows the positions of the first focal point F1 of the spheroidal reflecting surface 60a constituting the first reflector 60 and the light emitting surfaces 8a and 9a of the low beam light source 8 and the high beam light source 9 constituting the light source unit 5. It is a plan view.
  • FIG. 9 is a schematic view showing a light source image of the light reflected by the first reflector 60.
  • the first reflector 60 to be compared has the center of the low beam light source 8 (the central portion of the light emitting surface 8a) as the first focal point F1 and the focal point F3 of the rotating paraboloid reflecting surface 7a. It has a rotating elliptical reflecting surface 60a as a second focal point (not shown).
  • the first reflector 60 When the first reflector 60 is used, it is possible to improve the utilization efficiency of the light L emitted from the light source unit 5 as in the case where the first reflector 6 described above is used.
  • the light source image of the light reflected by the spheroidal reflecting surface 60a as shown in the enclosed portion B in FIG. 9, glare light may be generated in the upper part of the light source image.
  • the light source images of the light reflected by the four reflection regions 61a, 62a, 61b, 62b are synthesized. Therefore, it is possible to form a light source image (low beam light distribution pattern) including a good cut-off line while preventing the occurrence of glare.
  • the second focal points F2a and F2b of the spheroidal reflecting surfaces 6a and 6b and the focal points F3 of the spheroidal reflecting surface 7a are all overlapped in the front-rear direction, the left-right direction, and the up-down direction.
  • the focal points F2a, F2b and the focal point F3 are matched with each other in the direction of the above, but the three focal points F2a, F2 and the focal point F3 are such that the light distribution does not separate in the left-right direction (Y-axis direction).
  • the configuration may be arranged so as to be shifted in the left-right direction.
  • the focal points F2a and F2b may be arranged at positions sandwiching the focal points F3 in the left-right direction.
  • the second focal points F2a and F2b and the focal points F3 may be arranged so as to coincide with each other in the front-rear direction (X-axis direction) and the up-down direction (Z-axis direction).
  • the utilization efficiency of the light L emitted from the light source unit 5 is high, and the number of parts is reduced and the structure is simplified. It is possible to further reduce the size of the body 4.
  • FIG. 10 is a front view showing the configuration of the vehicle headlight 1B.
  • FIG. 11 is a cross-sectional view of the vehicle headlight 1B by the line segments XI-XI shown in FIG.
  • FIG. 12 is a perspective perspective view showing the first reflector 21 and the light source unit 5 included in the vehicle headlight 1B.
  • FIG. 13 shows the first focal points F1a, F1b, F1c of the pair of spheroidal reflecting surfaces 21a and 21b forming the first reflector 21 and the central spheroidal reflecting surface 21c, and the low beam light source 8 forming the light source unit 5. It is a plan view which shows the position of the high beam light source 9 with the light emitting surface 8a, 9a. Further, in the following description, the same parts as those of the vehicle headlight 1A will be omitted and the same reference numerals will be given in the drawings.
  • the vehicle headlight 1B of the present embodiment includes a light source unit 5, a first reflector 21, and a pair of firsts inside a light body 4 (not shown). It is provided with 2 reflectors 22.
  • the first reflector 21 is arranged in front of the light source unit 5 and reflects the light L emitted from the light source unit 5 toward the periphery of the light source unit 5.
  • the first reflector 21 includes a pair of spheroidal reflecting surfaces 21a and 21b and a pair of spheroidal reflecting surfaces 21a, which are vertically symmetrical with respect to the optical axis of the light emitted from the low beam light source 8. It has a central spheroidal reflecting surface 21c arranged between 21b.
  • the pair of spheroidal reflecting surfaces 21a and 21b are concave reflecting surfaces obtained by rotating a part of an elliptical line having two focal points so as to surround the upper side and the lower side of the light source unit 5. ..
  • the first focal point F1a of one spheroidal reflecting surface 21a (first spheroidal reflecting surface 21a) and the other spheroidal reflecting surface 21b (second spheroidal reflecting surface 21b).
  • the first focal point F1b is located on both sides of the light emitting surface 8a of the low beam light source 8 in the width direction with the center in between.
  • the first focal point F1a of one spheroidal reflecting surface 21a and the first focal point F1b of the other spheroidal reflecting surface 21b are located at the upper corners of the light emitting surface 8a of the low beam light source 8. ing.
  • the pair of spheroidal reflecting surfaces 21a and 21b are symmetrical with respect to the center line in the vertical direction passing through the optical axis of the light emitted from the low beam light source 8, respectively. It is divided into 212b. Specifically, one spheroidal reflection surface 21a is divided into a pair of symmetrical first reflection regions 211a and a second reflection region 212a. The other spheroidal reflection surface 21b is divided into a pair of symmetrical third reflection regions 211b and a fourth reflection region 212b.
  • the first reflector 21 is located on the other side in the left-right direction while condensing the light L incident on the first reflection region 211a and the third reflection region 211b located on one side in the left-right direction. It reflects toward the second reflector 22. Further, the first reflector 21 is located on one side in the left-right direction while condensing the light L incident on the second reflection region 212a and the fourth reflection region 212b located on the other side in the left-right direction. It reflects toward the reflector 22 of 2.
  • the central spheroidal reflecting surface 21c is a concave reflecting surface obtained by rotating a part of an elliptical line having two focal points between a pair of spheroidal reflecting surfaces 21a and 21b.
  • the first focal point F1c of the central spheroidal reflecting surface 21c is the first focal point F1a of one spheroidal reflecting surface 21a on the light emitting surface 8a of the low beam light source 8 and the first focal point F1b of the other spheroidal reflecting surface 21b. It is located between. Specifically, the first focal point F1c of the central spheroidal reflecting surface is located at the upper central end of the light emitting surface 8a of the low beam light source 8.
  • the central spheroidal reflection surface 21c is divided into a pair of reflection regions 211c and 212c that are symmetrical with respect to the center line in the vertical direction passing through the optical axis of the light emitted from the low beam light source 8. Specifically, the central spheroidal reflection surface 21c is divided into a pair of symmetrical fifth reflection regions 211c and sixth reflection regions 212c.
  • the first reflector 21 directs the light L incident on the fifth reflection region 211c located on one side in the left-right direction toward the second reflector 22 located on the other side in the left-right direction. And reflect. Further, the first reflector 21 focuses the light L incident on the sixth reflection region 212c located on the other side in the left-right direction, and toward the second reflector 22 located on the other side in the left-right direction. reflect.
  • the second focal point F2a of one spheroidal reflecting surface 21a (first and second reflecting regions 211a, 212a) and the other spheroidal reflecting surface 21b (third and fourth reflecting regions)
  • the second focal point F2b of 211b, 212b) and the second focal point F2c of the central spheroidal reflecting surface 21c are located at positions that coincide with each other.
  • the first reflector 21 collects the light L incident on the pair of spheroidal reflecting surfaces 21a and 21b and the central spheroidal reflecting surface 21c toward the second focal points F2a, F2b and F2c that coincide with each other. However, it reflects toward the pair of second reflectors 22.
  • the first reflector 21 is reflected by a pair of spheroidal reflecting surfaces 21a and 21b and a central spheroidal reflecting surface 21c (first to sixth reflecting regions 211a, 212a, 211b, 212b, 211c, 212c). It has a pair of through holes 23a and 23b through which the light L is passed toward the second reflector 22.
  • a pair of through holes 23a and 23b are provided on both the left and right sides of the central spheroidal reflecting surface 21c.
  • the second focus F2a of the first reflection region 211a, the second focus F2b of the third reflection region 211b, and the second focus F2c of the fifth reflection region 211b are formed in one through hole 23a (first through hole 23a). It is located inside.
  • the second focus F2a of the second reflection region 212a, the second focus F2b of the fourth reflection region 212b, and the second focus F2c of the sixth reflection region 212c are the other through holes 23b (second). It is located inside the through hole 23b).
  • the pupil diameter of the light L reflected while being focused by the pair of spheroidal reflecting surfaces 21a, 21b is a pair of through holes. It can be made smaller at the position where it passes through 23a and 23b. This makes it possible to reduce the diameter of the pair of through holes 23a and 23b formed in the central spheroidal reflecting surface 21c.
  • the pair of second reflectors 22 are symmetrically arranged on both sides in the width direction with the light source unit 5 interposed therebetween.
  • the second reflector 22 reflects the light L reflected by the first reflector 6 toward the front of the vehicle.
  • the pair of second reflectors 22 have a rotating object-based reflecting surface 22a facing the pair of through holes 23a and 23b.
  • the rotating parabolic reflection surface 22a is a concave reflection obtained by rotating a part of a parabola having the second focal points F2a, F2b, F2c of the rotating elliptical reflecting surfaces 21a, 21b, 21c that coincide with each other as the focal point F3. It is a face. That is, the focal point F3 of the rotating parabolic reflecting surface 22a and the second focal points F2a, F2b, F2c of the rotating elliptical reflecting surfaces 21a, 21b, 21c are located at positions that coincide with each other inside the through holes 23a, 23b. is there.
  • the focal point F3 of the rotating parabolic reflection surface 22a in one of the reflectors 22 and the second of the first, third and fifth reflection regions 211a, 211b, 211c are located inside one of the through holes 23a so as to coincide with each other.
  • the focal point F3 of the rotating parabolic reflection surface 22a in the other reflector 22 and the second focal points F2a, F2b, F2c of the second, fourth and sixth reflection regions 212a, 212b, 212c are Inside the other through hole 23b, they are in positions that coincide with each other.
  • the pair of second reflectors 22 reflect the light L incident on the respective rotating object system reflecting surfaces 22a while collimating in the vertical direction toward the front of the vehicle.
  • the light emitted from the low beam light source 8 is used as the passing beam (low beam) by the first reflector 21 and the pair of second reflectors 22. It illuminates toward the front of the vehicle while reflecting more. As a result, a low beam light distribution pattern including a cut-off line can be formed at the upper end.
  • the light emitted from the high beam light source 9 is reflected by the first reflector 21 and the pair of second reflectors 22 as the traveling beam (hyme) while being reflected. Irradiate toward the front of the vehicle. As a result, the high beam light distribution pattern can be formed above the low beam light distribution pattern.
  • the vehicle headlight 1B of the present embodiment not only reduces the number of parts but also reduces the number of parts by providing the light source unit 5 constituting the socket with a coupler equipped with the above-mentioned low beam and high beam light sources 8 and 9. , It is possible to design the lamp body 4 more compactly.
  • the light L emitted from the light source unit 5 described above is used by the pair of spheroidal reflecting surfaces 21a and 22b of the first reflector 21 and the central spheroidal reflecting surface 21c (The first to sixth reflection regions 211a, 212a, 211b, 212b, 211c, 212c) efficiently reflect the light L toward the pair of second reflectors 22, and the light L is a spheroidal paraboloid of the second reflector 21.
  • the surface 22a can efficiently reflect the light toward the front of the vehicle. This makes it possible to improve the utilization efficiency of the light L emitted from the light source unit 5.
  • the first focal point F1a of one of the spheroidal reflecting surfaces 21a and the first focal point F1b of the other spheroidal reflecting surface 21b described above are used by the low beam light source 8.
  • a shade is used by locating the first focal point F1c of the central spheroidal reflecting surface 21c at the upper central end of the light emitting surface 8a of the low beam light source 8 while locating it at both upper end corners of the light emitting surface 8a. It is possible to form a low beam light distribution pattern including a cut-off line at the upper end without any problem.
  • a light source image of light reflected by a pair of spheroidal reflecting surfaces 21a and 21b constituting the first reflector 21 and a central spheroidal reflecting surface 21c, and a light source image obtained by synthesizing these light source images are shown. 14A to 14D are shown.
  • FIG. 14A is a schematic view showing a light source image of light reflected by one of the spheroidal reflecting surfaces 21a.
  • FIG. 14B is a schematic view showing a light source image of light reflected by the central spheroidal reflecting surface 21c.
  • FIG. 14C is a schematic view showing a light source image of light reflected by the other spheroidal reflecting surface 21b.
  • FIG. 14D is a light source image obtained by synthesizing the light source images shown in FIGS. 14A to 14C.
  • FIG. 15 is a perspective perspective view showing the first reflector 210 and the light source unit 5 to be compared.
  • FIG. 16 shows the positions of the first focal point F1 of the spheroidal reflecting surface 210a constituting the first reflector 210 and the light emitting surfaces 8a and 9a of the low beam light source 8 and the high beam light source 9 constituting the light source unit 5. It is a plan view.
  • FIG. 17 is a schematic view showing a light source image of the light reflected by the first reflector 210.
  • the first reflector 210 to be compared has the center of the low beam light source 8 (the central portion of the light emitting surface 8a) as the first focal point F1 and the focal point F3 of the rotating paraboloid reflecting surface 22a. It has a rotating elliptical reflecting surface 210a as a second focal point (not shown). Further, the spheroidal reflection surface 210a is divided into a pair of reflection regions 210b and 210c that are symmetrical with respect to the center line in the vertical direction passing through the optical axis of the light emitted from the low beam light source 8.
  • the first reflector 210 When the first reflector 210 is used, it is possible to improve the utilization efficiency of the light L emitted from the light source unit 5 as in the case of using the first reflector 21 described above.
  • the light source image of the light reflected by the spheroidal reflecting surface 210a as shown in the enclosed portion D in FIG. 17, glare light may be generated in the upper part of the light source image.
  • the light is reflected by the pair of spheroidal reflecting surfaces 21a and 21b and the central spheroidal reflecting surface 21c.
  • a light source image low beam light distribution pattern
  • the second focal points F2a, F2b, F2c of the spheroidal reflecting surfaces 21a, 21b, 21c described above and the focal points F3 of the rotating parabolic reflecting surface 7a overlap in the front-rear direction, the left-right direction, and
  • the focal points F2a, F2b, F2c and the focal point F3 are matched with each other in all the vertical directions, and the four focal points F2a, F2b, F2c and the focal point F3 are in the left-right direction (Y-axis axis direction). ) May be arranged so as to be shifted in the left-right direction so that the light distribution does not separate.
  • the focal points F2a and F2b may be arranged at positions such that the focal points F2a and F2b sandwich the focal points F3 in the left-right direction and the focal points F2c coincide with the focal points F3.
  • the second focal points F2a and F2b and the focal points F3 may be arranged so as to coincide with each other in the front-rear direction (X-axis direction) and the up-down direction (Z-axis direction).
  • the utilization efficiency of the light L emitted from the light source unit 5 is high, and the number of parts is reduced and the structure is simplified. It is possible to further reduce the size of the body 4.
  • the light source unit 5 described above is configured by a socket with a coupler attached separately from the lamp body 4, but is not necessarily limited to such a configuration. Instead, the light source unit 5 may be integrally mounted inside the lamp body 4.
  • the light source unit 5 has a configuration in which the above-mentioned low beam light source 8 and high beam light source 9 are mounted, but the configuration is not necessarily limited to such a configuration, and the light source unit 5 is at least The configuration may be such that the low beam light source 8 is mounted, and the high beam light source 9 may be omitted and the high beam light source 9 may be attached separately from the low beam light source 8.
  • the rotating paraboloids 7a and 22a have the rotating paraboloid as a basic shape, and the rotating paraboloid surface is formed to the extent that the focal point F3 is formed and the collimating function in the vertical direction is maintained. It may be a reflective surface in which a part or the whole of the above is deformed.
  • the present invention is applied to the headlamps (headlamps) for vehicles of saddle-type vehicles such as the above-mentioned motorcycles and tricycles has been illustrated, but the front end of vehicles such as four-wheeled vehicles has been illustrated. It is also possible to apply the present invention to vehicle headlamps mounted on both corners on the side.
PCT/JP2020/016404 2019-04-22 2020-04-14 車両用前照灯 WO2020218085A1 (ja)

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CN117515468B (zh) * 2024-01-02 2024-04-12 华域视觉科技(上海)有限公司 照明模组、照明系统及车辆

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