WO2021153419A1 - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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Publication number
WO2021153419A1
WO2021153419A1 PCT/JP2021/002077 JP2021002077W WO2021153419A1 WO 2021153419 A1 WO2021153419 A1 WO 2021153419A1 JP 2021002077 W JP2021002077 W JP 2021002077W WO 2021153419 A1 WO2021153419 A1 WO 2021153419A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light guide
incident
guide body
emitting
Prior art date
Application number
PCT/JP2021/002077
Other languages
French (fr)
Japanese (ja)
Inventor
鈴木　健太
山本　和也
Original Assignee
株式会社小糸製作所
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 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to JP2021573976A priority Critical patent/JPWO2021153419A1/ja
Priority to CN202180006323.XA priority patent/CN114667409A/en
Publication of WO2021153419A1 publication Critical patent/WO2021153419A1/en

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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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/27—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/35—Brake lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a technical field of a vehicle lamp having an inner lens that guides and emits incident light in a predetermined direction.
  • a light source and an inner lens are arranged inside a lamp outer housing composed of a cover and a lamp housing, and the light emitted from the light source is guided by the inner lens and directed from the exit surface of the inner lens to the outside.
  • a type to be irradiated see, for example, Patent Document 1.
  • the inner lens has an incident surface on which the light emitted from the light source is incident and an emitting surface on which the incident light is emitted, and the light incident from the incident surface is guided in a predetermined direction and emitted from the emitting surface.
  • the light incident from the incident surface is included in such an inner lens.
  • FIG. 4 of Patent Document 1 there is a type (see FIG. 4 of Patent Document 1) in which internal reflection is performed on all reflective surfaces and the light is emitted from the exit surface.
  • Patent Document 1 when an inner lens as described in Patent Document 1 is used to irradiate light toward a wide area in the vertical direction, for example, the entire inner lens is formed into a thick shape in the vertical direction. However, if the inner lens is made thicker, the molding time becomes longer and the manufacturing cost becomes higher.
  • the purpose of the vehicle lamp of the present invention is to irradiate a wide range of light with light while reducing the manufacturing cost.
  • the vehicle lighting equipment includes a light source that emits light and an inner lens that emits light that is incident and incident light emitted from the light source, and the inner lens is incident. It has a light guide portion that guides light and a branch portion that is continuous with the light guide portion and is formed in a shape that is branched into at least two, and the branch portion has a first portion having a first exit surface and a first portion. It is composed of a second portion having two emission surfaces, and the light guided by the light guide portion is separated at the branch portion and emitted from the first emission surface and the second emission surface. be.
  • the incident light is guided toward the branch portion in the light guide portion, separated at the branch portion, and emitted from the first emission surface and the second emission surface, respectively.
  • the first portion and the second portion are positioned vertically.
  • the irradiation range of the light from the branch portion is set to a large range in the vertical direction.
  • the inner lens is provided with an incident surface having an incident surface for incident light emitted from the light source and an incident control unit for making the incident light parallel light. It is desirable to be.
  • the light emitted from the light source and incident on the inner lens is converted into parallel light by the incident control unit and guided by the light guide unit.
  • a total reflection surface that internally reflects the light incident on the light guide portion is formed, and the light guide portion projects outward in the thickness direction. It is desirable to provide continuous protrusions on all reflective surfaces.
  • the edges of the total reflection surface are not formed in a chamfered shape in the thickness direction of the light guide portion, and the effective reflection area of the total reflection surface is increased.
  • the light emitted from the first exit surface and the second exit surface are diffused by the diffusion step.
  • another vehicle lamp has a light source that emits light, a first incident surface, and a first emitting surface, and guides the light incident from the first incident surface. It has a first light guide body that emits from the first exit surface, a second incident surface, and a second exit surface, and guides light incident from the second incident surface to guide the second exit surface.
  • a second light guide body emitted from a surface is provided, and each part of the light emitted from the light source is incident on the first incident surface and the second incident surface, respectively, and the first incident surface. The amount of light incident from the surface and the second incident surface is different.
  • the light guiding distance of the second light guide body is made longer than the light light guiding distance of the first light guide body. It is desirable that the light emitting center of the light source is located closer to the second incident surface side than the center of the first incident surface and the second incident surface.
  • the light emitting center of the light source exists at a position closer to the second incident surface in the second light guide body having a long light guide distance.
  • the area of the second exit surface is made larger than the area of the first exit surface, and the light emitting center of the light source is the first incident surface. It is desirable that the surface is located closer to the second incident surface than the center of the surface and the second incident surface.
  • the light emitting center of the light source exists at a position closer to the second incident surface in the second light guide body having a large light emitting area.
  • a positioning protrusion is provided on one of the first light guide body and the second light guide body, and the positioning protrusion is the second one. It is desirable that the first light guide body and the second light guide body are positioned while being pressed against the other of the light guide body 1 or the second light guide body.
  • the positioning protrusion is pressed against the first light guide body or the other of the second light guide bodies, so that the first light guide body and the second light guide body are positioned.
  • an inner housing for holding the first light guide body and the second light guide body is provided, and the inner housing is provided with the first light guide body.
  • a mounting boss for attaching one of the light guide body or the second light guide body by screwing and a receiving support portion for supporting the other of the first light guide body or the second light guide body are provided. Then, in a state where one of the first light guide body or the second light guide body is screwed to the mounting boss, the other of the first light guide body or the second light guide body is said to be the first. It is desirable that the light guide body of 1 or the second light guide body is pressed in one direction and is received by the receiving support portion from the other direction opposite to the one direction.
  • the positioning protrusion is pressed against the other of the first light guide body or the second light guide body, and one of the first light guide body or the second light guide body is screwed to the mounting boss. Since the other of the first light guide body or the second light guide body is received by the receiving support portion, the other of the first light guide body or the second light guide body is attached to the inner housing without being screwed. It is attached.
  • the incident light is guided toward the branch portion in the light guide portion, separated at the branch portion, and emitted from the first emission surface and the second emission surface, respectively.
  • Both the first portion and the second portion can be formed into a thin shape, and it is possible to irradiate a wide range of light with light while reducing the manufacturing cost.
  • FIG. 2 to 13 show an embodiment of the vehicle lamp of the present invention, and this figure is a perspective view of the vehicle lamp with the cover separated. It is an exploded perspective view of a lamp unit. It is a horizontal cross-sectional view which shows the 1st inner lens and the like. It is a perspective view of the 1st inner lens. It is a vertical cross-sectional view which shows the 2nd inner lens and the like. It is a perspective view of the 2nd inner lens. It is a horizontal cross-sectional view which shows the 2nd inner lens and the like.
  • FIG. 6 is a cross-sectional view taken along the line VIII-VIII of FIG. It is a perspective view of the 1st light guide body and the 2nd light guide body.
  • the vehicle lighting tool 1 is attached to both left and right ends of the rear end of the vehicle body, and functions as a vehicle indicator light, for example.
  • the vehicle lamp 1 is used, for example, as a combination lamp having the functions of a tail lamp, a stop lamp, and a turn signal lamp.
  • front-back, up-down, left-right directions will be described with the light emission direction from the vehicle lamp 1 as the rear.
  • the front-back, up-down, left-right directions shown below are for convenience of explanation, and the practice of the present invention is not limited to these directions.
  • the vehicle lamp 1 includes a lamp housing 2 having an opening at a position extending from the rear to the side, and a cover 3 for closing the opening of the lamp housing 2 (see FIG. 1).
  • the lamp housing 2 and the cover 3 form a lamp outer housing 4, and the internal space of the lamp outer housing 4 is formed as a lamp chamber.
  • a first light source, a second light source, and a third light source, which will be described later, are attached to the lamp housing 2.
  • the cover 3 is formed with, for example, a diffusion step 3a on the inner surface.
  • the outer peripheral portion of the cover 3 is provided as, for example, a light-shielding portion 3b formed of a black material, and the inner portion of the light-shielding portion 3b is provided as a transmission portion 3c capable of transmitting light.
  • the light emitted from the first light source, the second light source, and the third light source and transmitted through the transmitting portion of the cover 3 through 3c is diffused by the diffusion step 3a and irradiated to the outside.
  • the lamp unit 5 is arranged in the lamp room.
  • the lamp unit 5 is configured by arranging or attaching necessary parts to the inner housing 6 (see FIGS. 1 and 2).
  • the inner housing 6 is arranged in a state of being attached to the lamp housing 2.
  • the inner housing 6 has a rear portion 7, an upper portion 8, and a side portion 9, the upper edge of the rear portion 7 and the trailing edge of the upper portion 8 are continuous, and the outer side edge of the rear portion 7 and the trailing edge of the side portion 9 are continuous.
  • the outer side edge of the upper portion 8 and the upper edge of the side portion 9 are continuous.
  • a first arrangement hole 7a and a second arrangement hole 7b are formed side by side in the rear portion 7.
  • the upper shielding plate 10 is projected upward from the lower end of the rear opening edge in the first arrangement hole 7a and the rear portion 7 is projected forward from the lower end of the rear opening edge in the second arrangement hole 7b, respectively.
  • the lower shielding plate 11 is provided.
  • a first arrangement groove 7c that is opened rearward and extends to the left and right is formed on the upper side of the first arrangement hole 7a.
  • Second arrangement grooves 7d and 7d which are opened rearward and curved, are formed in a substantially parallel state at positions extending downward from the side of the first arrangement hole 7a and the second arrangement hole 7b.
  • the front end of the upper portion 8 is provided with a mounting boss 12, a regulating wall 13, 13 and a holding receiving portion 14 and a receiving supporting portion 15 projecting upward, respectively (see the enlarged view of FIG. 2).
  • the mounting boss 12 is formed with a screw hole opened upward.
  • the regulating walls 13 and 13 are positioned so as to face each other on the left and right in the vicinity of the mounting boss 12.
  • the front and rear widths of one regulation wall 13 are larger than those of the other regulation wall 13, and an insertion notch 13a opened upward is formed in one regulation wall 13.
  • the holding receiving portion 14 is provided between the regulation walls 13 and 13 and is formed in a shape having a recess opened upward.
  • the receiving support portion 15 is located on the side of the mounting boss 12, and the upper surface is formed as a receiving surface 15a as a downwardly convex gentle arc surface.
  • the first inner lens 16 is inserted and arranged in the first arrangement hole 7a of the inner housing 6 (see FIGS. 2 to 4).
  • the first inner lens 16 is attached to the inner housing 6 by being partially screwed.
  • the first inner lens 16 is formed of, for example, a transparent resin material.
  • the first inner lens 16 is incident on an incident portion 17 on which light is incident, and a plate-shaped first reflecting portion 18 projecting obliquely rearward from an outer end portion in the left-right direction of the incident portion 17.
  • a plate-shaped second reflecting portion 19 projecting diagonally rearward from the inner end portion in the left-right direction of the portion 17, and a plate-shaped second reflecting portion 19 continuous with the first reflecting portion 18 and inclined with respect to the front-rear direction (optical axis direction). It has a plate-shaped first emitting portion 20 and a plate-shaped second emitting portion 21 which is continuous with the second reflecting portion 19 and is inclined in the front-rear direction.
  • the first reflecting portion 18 and the second reflecting portion 19 are inclined so as to be separated from each other in the left-right direction toward the rear, and the first emitting portion 20 and the second emitting portion 21 are also inclined in the left-right direction toward the rear. It is tilted so as to separate from each other.
  • the incident portion 17 is formed in a convex shape rearward, the front surface is formed as an incident surface 17a, and the rear surface is formed as an exit surface 17b (see FIG. 3).
  • the outer peripheral surfaces of the left and right side portions of the incident portion 17 are formed as total reflection surfaces 17c and 17c, respectively.
  • the first reflecting portion 18 and the second reflecting portion 19 are inclined in the left-right direction so as to be separated from each other toward the rear.
  • the inclination angle P1 of the first reflecting portion 18 with respect to the front-rear direction is made larger than the inclination angle P2 of the second reflecting portion 19 with respect to the front-rear direction.
  • first exiting portion 20 and the second emitting portion 21 are also inclined in the left-right direction so as to be separated from each other as they go backward.
  • the inclination angle Q1 of the first emission unit 20 with respect to the front-rear direction is larger than the inclination angle Q2 of the second emission unit 21 with respect to the front-rear direction.
  • the front surface of the first exit portion 20 is formed as a total reflection surface 20a, and the rear surface is formed as an exit surface 20b. A part of the light is internally reflected on the exit surface 20b.
  • the front surface of the second exit portion 21 is formed as a total reflection surface 21a, and the rear surface is formed as an emission surface 21b.
  • the length D1 of the first exiting portion 20 in the light guide direction is shorter than the length D2 of the second exit portion 21 in the light guide direction, and the light guide distance is increased.
  • the pitch of the steps formed on the total reflection surface 20a, the total reflection surface 21a, the emission surface 20b, and the emission surface 21b is set according to the difference. Specifically, the pitch of the steps on the total reflection surface 20a is made smaller than the pitch of the steps on the total reflection surface 21a so that the number of pitches of both steps is substantially the same, and the pitch of the steps on the emission surface 20b is the pitch of the steps on the emission surface 21b. It is made smaller than the pitch of the steps so that the number of pitches of both steps is substantially the same.
  • the incident surface 17a of the incident portion 17 is positioned so as to face the rear side of the light emitting portion 22a of the first light source 22 attached to the lamp housing 2. (See Fig. 3).
  • the second inner lens 23 is inserted and arranged in the second arrangement hole 7b of the inner housing 6 (see FIGS. 2, 5 and 6).
  • the second inner lens 23 is attached to the inner housing 6 by being partially screwed.
  • the second inner lens 23 is made of, for example, a transparent resin material.
  • the second inner lens 23 is continuous with the light guide unit 25 and the light guide unit 25, which are continuous with the incident control unit 24 and the incident control unit 24 on which light is incident, and are formed, for example, in a bifurcated shape. It has a branch portion 26 (see FIGS. 5 to 7).
  • the incident control unit 24 is formed in a plate shape with the thickness direction in the vertical direction, and the central incident portion 27 having an arcuate surface whose front surface is convex forward and side incidents provided on both the left and right sides of the central incident portion 27. It has parts 28 and 28.
  • the front surface of the central incident portion 27 is formed as an incident surface 27a.
  • the side incident portions 28, 28 are formed in a tapered shape that is convex forward, and the surfaces on the side continuous with the incident surface 27a are formed as the incident surfaces 28a, 28a, respectively, and the incident surfaces 27a sandwich the incident surfaces 28a, 28a.
  • the surfaces located on the opposite sides are formed as total reflection surfaces 28b and 28b, respectively.
  • the light guide portion 25 is formed in a plate shape having a thickness direction in the vertical direction, and is formed in a shape extending substantially to the left and right.
  • the light guide portion 25 has a continuous inclined surface at the rear end of one of the total reflection surfaces 28b, and this inclined surface is formed as the first total reflection surface 25a.
  • the front surface of the light guide portion 25 is formed as a second total reflection surface 25b.
  • the light guide portion 25 is provided with protrusions 29, 29 protruding upward or downward (see FIG. 8).
  • the protrusions 29, 29 are provided at positions continuous with the first total reflection surface 25a.
  • the second inner lens 23 is formed to have a thin overall thickness in order to shorten the molding time by injection molding, and the vertical width of the first total reflection surface 25a tends to be reduced accordingly.
  • the portion where the ridge line is formed is often chamfered to form a so-called C surface or R surface, and the boundary portion between the upper end of the first total reflection surface 25a and the upper surface of the light guide portion 25 and the like.
  • the boundary portion between the lower end of the first total reflection surface 25a and the lower surface of the light guide portion 25 may be formed in a chamfered shape.
  • the reflection region of the first total reflection surface 25a may become small, but as described above, the protrusions 29 and 29 are provided at positions continuous with the first total reflection surface 25a.
  • the edge of the first total reflection surface 25a is not formed in a chamfered shape in the thickness direction of the light guide portion 25.
  • the effective reflection area of the first total reflection surface 25a is increased, and the utilization efficiency of the light incident on the second inner lens 23 can be improved.
  • the protrusions 29 and 29 are provided at positions continuous with the first total reflection surface 25a
  • the protrusions are provided at positions continuous with the second total reflection surface 25b.
  • the utilization efficiency of the light incident on the second inner lens 23 may be improved.
  • the branch portion 26 is formed in a bifurcated shape branched in the vertical direction and is continuous with the rear end portion of the light guide portion 25 (see FIGS. 5 and 6).
  • the branch portion 26 is composed of a first portion 30 inclined so as to be displaced upward toward the rear and a second portion 31 inclined so as to be displaced downward toward the rear.
  • the branch portion 26 may be formed in a shape branched into three or more.
  • the first portion 30 is formed in a horizontally long shape, the lower portion of the rear surface is formed as the first total reflection inclined surface 30a, and the portion of the front surface excluding the upper end is the second. It is formed as a total reflection inclined surface 30b. Of the rear surface of the first portion 30, the upper portion of the first total reflection inclined surface 30a is formed as the first exit surface 30c.
  • the second portion 31 is formed in a horizontally long shape, the upper portion of the rear surface is formed as the first total reflection inclined surface 31a, and the portion of the front surface excluding the lower end is the second total. It is formed as a reflection inclined surface 31b. Of the rear surfaces of the second portion 31, the lower portion of the first total reflection inclined surface 31a is formed as the second exit surface 31c.
  • a fisheye step is formed as a diffusion step on each of the first exit surface 30c and the second exit surface 31c.
  • the light emitted from the first exit surface 30c and the second exit surface 31c is diffused in the vertical direction and the horizontal direction by the fisheye step, respectively.
  • the incident surface 27a of the incident control unit 24 is positioned so as to face the rear side of the light emitting unit 32a of the second light source 32 attached to the lamp housing 2. (See FIG. 7).
  • a portion of the inner housing 6 excluding a part of the first light guide 33 is inserted and arranged in the first arrangement groove 7c (see FIG. 2).
  • the first light guide body 33 is attached to the inner housing 6 by being partially screwed.
  • the first light guide 33 is formed in a substantially L shape by, for example, a transparent resin material (see FIG. 9).
  • the first light guide body 33 is a shaft-shaped light guide 34 formed in a substantially round shaft shape having a predetermined shape, and an arm 35 and an arm protruding from one end in the axial direction of the shaft light guide 34. It has a attached portion 36 continuous with 35 and a fin-shaped light emitting portion 37 protruding downward from a portion excluding a part of the shaft-shaped light guide portion 34.
  • the axial light guide portion 34 is composed of a start end portion 38 extending substantially in the front-rear direction and an exit portion 39 bent with respect to the start end portion 38 and extending substantially in the left-right direction, and the length of the exit portion 39 in the axial direction is the start end portion 38. It is longer than the axial length.
  • the front end surface of the starting end portion 38 is formed as the first incident surface 38a
  • the rear surface of the emitting portion 39 is formed as the first exit surface 39a.
  • the rear surface of the light emitting portion 37 is also formed as a first emitting surface 37a.
  • the first light guide body 33 is provided with a positioning protrusion 40 projecting downward from the start end portion 38, and the lower surface of the positioning protrusion 40 is formed as a pressing surface 40a on a gentle arc surface that is convex upward. ..
  • a portion of the inner housing 6 excluding a part of the second light guide body 41 is inserted and arranged in the second arrangement grooves 7d and 7d (see FIG. 2).
  • the second light guide body 41 is attached to the inner housing 6 by being partially pressed by the first light guide body 33.
  • the second light guide body 41 is formed in an annular shape as a whole by, for example, a transparent resin material (see FIG. 9).
  • the second light guide body 41 is shared by a pair of shaft-shaped light guide portions 42, 42 formed in a substantially round shaft shape having a predetermined shape and one end portion of the shaft-shaped light guide portions 42, 42 in the axial direction. It has a portion 43, a regulated portion 44 protruding from the common portion 43, and a connecting portion 45 that connects the other ends of the axial light guide portions 42, 42 in the axial direction.
  • the shaft-shaped light guide portion 42 is provided as a start end portion 46 in which a portion continuous with the common portion 43 is curved, and a portion continuous with the start end portion 46 is provided as an exit portion 47 curved in the direction opposite to the start end portion 46.
  • the rear surface of the exit portion 47 is formed as a second exit surface 47a.
  • the length of the exit portion 47 in the axial direction is longer than the length of the start end portion 46 in the axial direction.
  • the common portion 43 is formed in a round shaft shape having substantially the same diameter as the start end portions 46, 46 so that the start end portions 46, 46 are extended, and the tip surface is formed as a second incident surface 43a.
  • the light guide distance of the second light guide body 41 is longer than the light guide distance of the first light guide body 33.
  • the light guide distance of the first light guide body 33 corresponds to the length of the axial light guide unit 34 in the axial direction
  • the light guide distance of the second light guide body 41 is the axis of the axial light guide portions 42, 42. It corresponds to the total of the length in the direction and the length in the axial direction of the common portion 43.
  • the length of the shaft-shaped light guide portion 34 is shorter than the total length of the length of one shaft-shaped light guide portion 42 and the length of the shared portion 43 in the axial direction.
  • the second light guide body 41 Since the light guide distance of the second light guide body 41 is longer than the light guide distance of the first light guide body 33 in this way, the second light guide body 41 and the first light guide body 33, respectively.
  • the amount of light incident from the second incident surface 43a of the second light guide 41 is the first of the first light guide 33. It needs to be larger than the amount of light incident from the incident surface 38a.
  • the light emission area of the second light guide 41 is larger than the light emission area of the first light guide 33. ..
  • the light emitting area of the first light guide 33 corresponds to the total area of the first light emitting surface 37a and the area of the first light emitting surface 39a, and the light emitting area of the second light guide 41. Corresponds to the total area of the second exit surfaces 47a and 47a.
  • the second light guide body 41 Since the light emitting area of the second light guide body 41 is made larger than the light emitting area of the first light guide body 33 in this way, the second light guide body 41 and the first light guide body 33 In order to make the brightness when light is emitted to the same level, the amount of light incident from the second incident surface 43a of the second light guide 41 is the first light guide 33. It needs to be larger than the amount of light incident from the incident surface 38a of 1.
  • the second light guide body 41 configured as described above is arranged by inserting the exit portions 47, 47 of the axial light guide portions 42, 42 into the second arrangement grooves 7d, 7d of the inner housing 6, respectively.
  • the common portion 43 is inserted between the regulation walls 13 and 13 of the inner housing 6 from above and is inserted into the recess of the holding receiving portion 14 to be held (see FIG. 10).
  • the common portion 43 is inserted between the regulation walls 13 and 13 and held by the holding receiving portion 14, so that the second light guide body 41 is positioned in the left-right direction and the up-down direction.
  • the regulated portion 44 protruding from the common portion 43 is inserted into the insertion notch 13a formed in one of the regulating walls 13 from above, and the second light guide body 41 is positioned in the front-rear direction. Further, the common portion 43 is placed on the receiving support portion 15 of the inner housing 6.
  • the light emitting portion 37 and the emitting portion 39 of the first light guide body 33 are inserted into the first arrangement groove 7c of the inner housing 6. And placed.
  • the starting end portion 38, the arm portion 35, and the attached portion 36 are located on the upper surface side of the upper portion 8 of the inner housing 6, and the attached portion 36 is attached to the attachment boss 12 by screwing or the like.
  • the start end portion 38 of the first light guide body 33 is positioned directly above the start end portion 46 of the second light guide body 41, and the start end portion 46 is the second. It is pressed from above by the positioning protrusion 40 of the light guide body 33 of 1. At this time, the upper end side portion of the outer peripheral surface of the start end portion 46 is pressed by the pressing surface 40a of the positioning protrusion 40, and the lower end side portion of the outer peripheral surface of the start end portion 46 is pressed against the receiving surface 15a of the receiving support portion 15. The start end portion 46 is received by the receiving support portion 15 from below. Therefore, the second light guide body 41 is positioned in the vertical direction, and the position between the first light guide body 33 and the second light guide body 41 is performed.
  • the second light guide body 41 In a state where the starting end portion 46 of the second light guide body 41 is pressed from above by the positioning protrusion 40 of the first light guide 33, the second light guide body 41 is formed in an upwardly convex arcuate surface shape in the positioning protrusion 40.
  • the pressing surface 40a is pressed against the arcuate outer peripheral surface of the starting end portion 46, and the arcuate outer peripheral surface of the starting end portion 46 is pressed against the receiving surface 15a formed in the receiving support portion 15 in a downwardly convex arcuate shape. Be done. Therefore, the first light guide body 33 and the second light guide body 41 are held in the inner housing 6 in a stable state without rattling.
  • the first light guide 33 and the second light guide 41 are positioned while the positioning protrusion 40 is pressed against the second light guide 41. Will be.
  • the positioning protrusion 40 is pressed against the second light guide body 41 to position the first light guide body 33 and the second light guide body 41, the first light guide body 33 can be easily positioned by a simple configuration. High positional accuracy between the light guide 33 and the second light guide 41 can be ensured.
  • the first light guide body 33 is provided with a positioning protrusion 40 projecting downward, and the positioning protrusion 40 is pressed against the second light guide body 41.
  • the second light guide body 41 may be provided with a positioning protrusion protruding upward, and the first light guide body 33 may be pressed against the positioning protrusion.
  • the inner housing 6 is provided with a mounting boss 12 for mounting the first light guide 33 by screwing and a receiving support portion 15 for supporting the second light guide 41.
  • the second light guide body 41 is pressed in one direction (downward) by the first light guide body 33 and unidirectionally by the receiving support portion 15 (downward). Can be received from below).
  • the second light guide body 41 receives the receiving support portion 15 in a state where the positioning protrusion 40 is pressed against the second light guide body 41 and the first light guide body 33 is screwed to the mounting boss 12. Therefore, the second light guide body 41 is attached to the inner housing 6 without being screwed, and the first light guide body 33 and the second light guide body 41 are securely attached to the inner housing 6 by a simple configuration. Can be attached.
  • the first incident surface 38a and the second incident surface 43a are attached to the lamp housing 2. It is located behind the light emitting portion 48a of the third light source 48 (see FIG. 11).
  • the light emitting center 48b of the light emitting unit 48a is located on the second incident surface 43a side from the center of the first incident surface 38a and the second incident surface 43a.
  • the third light source 48 exists at a position where the light emitting center 48b faces the second incident surface 43a between the center S1 of the first incident surface 38a and the center S2 of the second incident surface 43a.
  • the light emitting center 48b of the third light source 48 is located on the second incident surface 43a side from the center of the first incident surface 38a and the second incident surface 43a, so that the light is emitted from the third light source 48.
  • the light is incident on the first light guide 33 from the first incident surface 38a and is incident on the second light guide 41 from the second incident surface 43a, but with the first incident surface 38a.
  • the amount of light incident from the second incident surface 43a is different, and the amount of light incident from the second incident surface 43a is larger than the amount of light incident from the first incident surface 38a.
  • the inner cover 49 is attached to the inner housing 6 from the rear side, and the inner cover 49 is used to attach the inner cover 49 to the inner housing 6.
  • Each part of the light guide body 33 of No. 1 and the light guide body 41 of the second light guide body 41 is covered (see FIGS. 1 and 2).
  • the inner cover 49 extends from the upper ends of the first cover portion 49a extending in the left-right direction, the second cover portion 49b and the first cover portion 49a which are continuously curved at one end in the longitudinal direction of the first cover portion 49a. It has a top surface portion 49c protruding forward.
  • substantially the entire first cover portion 49a and the second cover portion 49b are formed of a material that transmits light
  • the top surface portion 49c is formed of a material that does not transmit light.
  • the inner cover 49 is attached to the inner housing 6 with the top surface portion 49c positioned on the upper surface side of the upper portion 8.
  • the light emitting portion 37 and the emitting portion 39 of the first light guide body 33 are covered from the rear by the first cover portion 49a, and the second light guide body 41
  • the emitting portion 47 of the above is covered from the rear by the second covering portion 49b. Therefore, the light emitted from the light emitting portion 37 and the emitting portion 39 of the first light guide body 33 passes through the first covering portion 49a and is irradiated backward, and the light emitted from the second light guide body 41 is emitted.
  • the light emitted from 47 and 47 passes through the second covering portion 49b and is irradiated backward. Further, the top surface portion 49c shields unnecessary light leaking upward from the first light guide body 33.
  • the shielding cover 50 is attached to the inner housing 6 from above.
  • the shielding cover 50 is formed of a material that does not transmit light, and covers substantially the entire starting end 38 of the first light guide 33 and substantially the entire starting end 46 of the second light guide 41 from above. It is attached to the housing 6. Therefore, the shielding cover 50 shields unnecessary light leaking from the starting end 38 of the first light guide 33 and the starting end 46 of the second light guide 41.
  • An extension 51 is attached to the inner housing 6 inside the inner cover 49.
  • Each portion of the extension 51 is integrally formed of a black resin material, and has a frame portion 52 and a partition portion 53.
  • the frame portion 52 is formed in a size and shape corresponding to the inner space of the inner cover 49 formed by the first cover portion 49a and the second cover portion 49b.
  • the partition portion 53 is formed in a shape in which the frame portion 52 is vertically partitioned and extends in the left-right direction. Therefore, the extension 51 is formed with an upper space 51a and a lower space 51b above and below the partition portion 53, respectively.
  • the extension 51 is provided with an upper shielding portion 54 projecting forward from the upper opening edge of the upper space 51a and a lower shielding portion 55 projecting forward from the lower opening edge of the upper space 51a.
  • the frame portion 52 In the state where the extension 51 is attached to the inner housing 6, the frame portion 52 is arranged at a position surrounding the first inner lens 16 and the second inner lens 23 from the outer peripheral side, and the partition portion 53 is the first inner lens. It is arranged between the 16 and the second inner lens 23 (see FIG. 1). Further, the outer peripheral edges of the upper shielding portion 54 and the lower shielding portion 55 are positioned along the first emitting portion 20 and the second emitting portion 21 of the first inner lens 16. Therefore, the extension 51 makes it difficult for a gap to be formed between the first inner lens 16 and the second inner lens 23 or on the outer peripheral side, and each part arranged in the lamp chamber is shielded by the extension 51 when visually recognized from the outside. , The visibility is improved.
  • the inner housing 6 to which the first inner lens 16, the second inner lens 23, the first light guide 33, the second light guide 41, the inner cover 49, and the extension 51 are attached is a lamp chamber.
  • a vehicle lamp 1 is configured by attaching the cover 3 to the lamp housing 2 (see FIG. 1).
  • the vehicle lamp 1 is attached to the vehicle body, and the cover 3 is arranged in an inclined state so as to be displaced forward from the inside to the outside of the vehicle in the left-right direction according to the shape of the vehicle body (see FIGS. 3 and 7). ).
  • the inclination angle Q1 of the portion 20 with respect to the front-rear direction is made larger than the inclination angle Q2 of the second exit portion 21 with respect to the front-rear direction (see FIG. 3).
  • the cover 3 is tilted in the left-right direction, and the tilt angle Q1 of the first exit portion 20 with respect to the front-rear direction is larger than the tilt angle Q2 of the second exit portion 21 with respect to the front-rear direction.
  • the distance from the third to the first exit portion 20 is substantially the same as the distance from the cover 3 to the second exit portion 21.
  • the shortest distance L1a from the cover 3 to the first emitting portion 20 and the shortest distance L2a from the cover 3 to the second emitting portion 21 are made substantially the same, and the shortest distance L2a from the cover 3 to the first emitting portion 20 is made substantially the same.
  • the longest distance L1b up to and the longest distance L2b from the cover 3 to the second exit portion 21 are substantially the same.
  • the distance L1c from the cover 3 to the central portion in the light guide direction of the first exit portion 20 is substantially the same as the distance L2c from the cover 3 to the central portion in the light guide direction of the second exit portion 21.
  • the vehicle lamp 1 when light is emitted from the light emitting portion 22a of the first light source 22, the emitted light is emitted from the incident surface 17a to the incident portion 17 of the first inner lens 16. It is incident (see FIG. 12).
  • the light incident on the incident portion 17 is emitted from the emitting surface 17b except for a part thereof, is transmitted through the transmitting portion 3c of the cover 3, and is irradiated to the outside.
  • a part of the light incident on the incident portion 17 is internally reflected by the total reflection surfaces 17c and 17c, and goes to the first reflection portion 18 and the second reflection portion 19, respectively.
  • the light directed to the first reflecting portion 18 is internally reflected by the first reflecting portion 18, is internally reflected by the total reflection surface 20a of the first emitting portion 20, is emitted from the emitting surface 20b, and is emitted from the transmitting portion 3c of the cover 3. Is transmitted and irradiated to the outside. Further, the light directed to the second reflecting portion 19 is internally reflected by the second reflecting portion 19, internally reflected by the total reflection surface 21a of the second emitting portion 21, emitted from the emitting surface 21b, and transmitted through the cover 3. Part 3c is transmitted and irradiated to the outside.
  • the first reflecting portion 18 and the second reflecting portion 19 are inclined at predetermined angles with respect to the front-rear direction, respectively, and the first emitting portion 20 And the second exiting portion 21 are also inclined at predetermined angles with respect to the front-rear direction, and the light reflected internally by the first reflecting portion 18 is reflected internally by the reflection angle ⁇ 1 and the second reflecting portion 19.
  • the reflection angle ⁇ 2 of the light is different from that of the light (see FIG. 3).
  • the reflection angle ⁇ 1 at the first reflection unit 18 is smaller than the reflection angle ⁇ 2 at the second reflection unit 19, and the light internally reflected by the first reflection unit 18 and the second reflection unit 19
  • the light reflected on the inner surface is appropriately reached at an angle at which the total reflection surface 20a of the first emission unit 20 and the total reflection surface 21a of the second emission unit 21 can be totally reflected, respectively.
  • the step pitch on the total reflection surface 20a is made smaller than the step pitch on the total reflection surface 21a
  • the step pitch on the emission surface 20b is the step pitch on the emission surface 21b. It is smaller than the pitch of.
  • the distance from the cover 3 to the first exit portion 20 is the distance from the cover 3 to the second exit portion 21. It is almost the same.
  • the first inner lens 16 and the cover 3 have the above-mentioned configuration and positional relationship, the light emitted from the emission surface 20b of the first emission unit 20 and the emission surface 21b of the second emission unit 21
  • the light emitted from the cover 3 is transmitted through the transmitting portion 3c of the cover 3 and is irradiated backward with substantially the same brightness.
  • the cover 3 is tilted in the left-right direction and is so-called slanted, the brightness of the light emitted from the first inner lens 16, transmitted through the transmitting portion 3c of the cover 3, and emitted backward. Is substantially uniform and is irradiated with light in which uneven brightness is suppressed, so that visibility can be improved.
  • the first emitting portion 20 and the second emitting portion 21 are inclined at predetermined angles with respect to the front-rear direction, respectively, with respect to the front-rear direction of the second emitting portion 21.
  • the tilt angle is smaller than the tilt angle of the first exit portion 20 with respect to the front-rear direction.
  • the rear end portion of the second exit portion 21 is positioned close to the cover 3, and the width H of the one end portion 52a of the frame portion 52 in the extension 51 in the front-rear direction is shortened accordingly (FIG. 3). reference).
  • the color (black) attached to the extension 51 is not visually recognized with a large width in the front-rear direction, and the visibility when the inside of the vehicle lamp 1 is visually recognized from the outside can be improved. can.
  • the incident control unit 24 of the second inner lens 23 when light is emitted from the light emitting unit 32a of the second light source 32, the emitted light is incident on the incident control unit 24 of the second inner lens 23 from the incident surfaces 27a, 28a, 28a (FIG. 13). reference).
  • the light incident from the incident surface 27a of the incident control unit 24 is controlled by the incident surface 27a to be parallel light, and the light incident from the incident surfaces 28a and 28a of the incident control unit 24 is controlled by the total reflection surfaces 28b and 28b, respectively. It is internally reflected and controlled to be parallel light. Therefore, all the light incident on the incident control unit 24 is made into parallel light and heads toward the first total reflection surface 25a of the light guide unit 25.
  • first total reflection surface 25a Light directed toward the first total reflection surface 25a is internally reflected by the first total reflection surface 25a, and subsequently internally reflected by the second total reflection surface 25b (see FIGS. 13 and 14).
  • the light internally reflected by the second total reflection surface 25b is guided toward the branch portion 26 by the light guide portion 25 and separated into the first portion 30 and the second portion 31 (see FIG. 14).
  • the light guided to the first portion 30 is internally reflected by the first total reflection inclined surface 30a and the second total reflection inclined surface 30b, emitted from the first exit surface 30c, and is emitted from the first emission surface 30c, and is emitted from the transmission portion 3c of the cover 3. Is transmitted and irradiated to the outside. Further, the light guided to the second portion 31 is internally reflected by the first total reflection inclined surface 31a and the second total reflection inclined surface 31b, emitted from the second exit surface 31c, and transmitted through the cover 3. Part 3c is transmitted and irradiated to the outside.
  • the second inner lens 23 has a light guide portion 25 that guides the incident light and a bifurcated branch portion 26 that is continuous with the light guide portion 25, and the branch portion 26 is the first. It is composed of a first portion 30 having an exit surface 30c and a second portion 31 having a second exit surface 31c, and the light guided by the light guide portion 25 is separated at the branch portion 26 to emit the first light. It is emitted from the surface 30c and the second exit surface 31c.
  • the light incident on the second inner lens 23 is guided toward the branch portion 26 by the light guide portion 25, separated at the branch portion 26, and emitted from the first emission surface 30c and the second emission surface 31c, respectively. Will be done.
  • the light guide portion 25, the first portion 30, and the second portion 31 can all be formed into a thin shape, and it is necessary to irradiate a wide range with a thick inner lens. Therefore, it is possible to irradiate a wide range of light with the aim of reducing the manufacturing cost.
  • the second inner lens 23 is formed by injection molding using a molten resin
  • the thickness of the second inner lens 23 becomes thicker, sink marks are likely to occur during cooling after the cavity is filled with the molten resin.
  • the molding accuracy of the second inner lens 23 may decrease, but since it is possible to reduce the thickness of each part of the second inner lens 23, the molding accuracy of the second inner lens 23 can be improved. It is possible to irradiate a wide range of light with a plan.
  • the irradiation range of the light from the branch portion 26 is set to a large range in the vertical direction, and the light guide portion 25 is arranged according to the shape of the vehicle body. It is possible to secure a desired irradiation state of light after making the shape thin in the vertical direction.
  • the second inner lens 23 is provided with an incident control unit 24 that converts the incident light into parallel light.
  • the light emitted from the second light source 32 and incident on the second inner lens 23 is converted into parallel light by the incident control unit 24 and guided by the light guide unit 25, so that the light is guided from the light guide unit 25 to the branch unit 26.
  • the light source control of the heading light becomes easy, and the light can be irradiated in a desired direction after improving the light utilization efficiency.
  • a diffusion step for example, a fisheye step, is formed on the first exit surface 30c and the second exit surface 31c of the second inner lens 23, respectively.
  • the diffusion step since the light emitted from the first emission surface 30c and the second emission surface 31c is diffused by the diffusion step, the brightness unevenness is suppressed from the first emission surface 30c and the second emission surface 31c. Light can be directed over a wide area.
  • the emitted light is the first light guide body 33 from the first incident surface 38a and the second incident surface 43a, respectively. It is incident on the common portion 43 of the start end portion 38 and the second light guide body 41.
  • the second The amount of light incident from the incident surface 43a is larger than the amount of light incident from the first incident surface 38a.
  • the light incident on the start end portion 38 of the first light guide body 33 is guided by the axial light guide portion 34 and emitted from the first emission surface 37a of the light emission portion 37 and the first emission surface 39a of the emission portion 39. Then, it is transmitted through the transmitting portion 3c of the cover 3 and irradiated to the outside.
  • the light incident on the common portion 43 of the second light guide body 41 is guided by the axial light guide portion 42 and emitted from the second exit surfaces 47a and 47a of the exit portions 47 and 47, respectively, and the cover 3 It is transmitted to the outside through the transmitting portion 3c of the above.
  • a plurality of light sources and light guides are arranged inside a lamp outer housing composed of a cover and a lamp housing, and the light emitted from each light source is the first light guide and the first light guide.
  • There is a type that is guided by the light guide body 2 and is irradiated outward from the emission surface of the first light guide body and the emission surface of the second light guide body for example, Japanese Patent Application Laid-Open No. 2017-183143). reference).
  • the shapes and sizes of the two light guide bodies are different, and the light guide distance and the emission area of the light in each light guide body are often different. There is a risk that the brightness of the light emitted from the light body will be different and uneven brightness will occur.
  • light sources having different amounts of emitted light from the first light guide body and the second light guide body may be used, or the amount of emitted light from each light source may be different. It is possible to provide a control circuit for control, but in these cases, the provision of different light sources and control circuits may lead to an increase in the manufacturing cost of vehicle lamps.
  • the vehicle lighting tool 1 light having a different amount of light from one third light source 48 is incident on the first incident surface 38a and the second incident surface 43a, respectively, so that the first It is not necessary to use light sources having different amounts of emitted light for the light guide body 33 and the second light guide body 41, or to provide a control circuit for controlling the amount of emitted light from each light source so as to increase the manufacturing cost. Brightness unevenness can be suppressed without any trouble.
  • the light guide distance of the second light guide 41 is made longer than the light guide distance of the first light guide 33, and the light emitting center 48b of the third light source 48 is aligned with the first incident surface 38a. It is located closer to the second incident surface 43a than the center of the second incident surface 43a.
  • the light emitting center 48b of the third light source 48 is located at a position closer to the second incident surface 43a in the second light guide body 41 having a long light guide distance, the light is emitted from the first exit surfaces 37a and 39a. It is possible to reduce the difference between the brightness of the light to be emitted and the brightness of the light emitted from the second exit surfaces 47a and 47a to ensure an illumination state in which uneven brightness is suppressed.
  • the total area of the second exit surfaces 47a and 47a is made larger than the total area of the first exit surfaces 37a and 39a, and the light emitting center 48b of the third light source 48 is the first incident surface 38a and the second. It is located on the second incident surface 43a side from the center of the incident surface 43a.
  • the light emitting center 48b of the third light source 48 is located at a position closer to the second incident surface 43a in the second light guide body 41 having a large light emitting area, from the first emitting surfaces 37a and 39a. It is possible to reduce the difference between the brightness of the emitted light and the brightness of the light emitted from the second exit surfaces 47a and 47a to ensure an illumination state in which uneven brightness is suppressed.
  • the first light source 22 the second light source 32, and the third light source 48
  • a light emitting diode LED: Light Emitting Diode
  • a so-called LED socket in which a substrate on which the 48a is mounted is attached to a housing is used.
  • LED socket When such an LED socket is used for, for example, a stop lamp or the like, a plurality of LEDs are often mounted, so that it may be difficult to control the light incident on the inner lens or the light guide body. In this case, light may leak from the inner lens or the light guide.
  • the light reflected by the first total reflection surface 25a like the second inner lens 23 is used as the light to be irradiated to the outside, and the first total reflection surface 25a is covered by the extension 51. This makes it possible to suppress light leakage to the outside of the vehicle lighting fixture 1.

Abstract

In the present invention, manufacturing cost is reduced, and a broad region is irradiated with light. The present invention comprises a light source that emits light, and an inner lens on which light emitted from the light source is incident and which emits the incident light. The inner lens has a light guide part that guides the incident light, and a branch part that is connected to the light guide part and formed in a shape that is branched into at least two sections. The branch part is configured from a first portion having a first emission surface and a second portion having a second emission surface. The light guided by the light guide part is divided at the branch part and emitted from the first emission surface and the second emission surface.

Description

車輌用灯具Vehicle lighting
　本発明は、入射された光を所定の方向へ導いて出射するインナーレンズを有する車輌用灯具についての技術分野に関する。 The present invention relates to a technical field of a vehicle lamp having an inner lens that guides and emits incident light in a predetermined direction.
　車輌用灯具には、カバーとランプハウジングによって構成された灯具外筐の内部に光源とインナーレンズが配置され、光源から出射された光がインナーレンズによって導かれインナーレンズの出射面から外部へ向けて照射されるタイプがある（例えば、特許文献１参照）。 In a vehicle lamp, a light source and an inner lens are arranged inside a lamp outer housing composed of a cover and a lamp housing, and the light emitted from the light source is guided by the inner lens and directed from the exit surface of the inner lens to the outside. There is a type to be irradiated (see, for example, Patent Document 1).
　インナーレンズは光源から出射された光が入射される入射面と入射された光を出射する出射面とを有し、入射面から入射された光を所定の方向へ導いて出射面から出射する構成にされている。このようなインナーレンズには、入射面から入射された光が直進されて出射面から出射されるタイプ（特許文献１の図１及び図２参照）の他に、入射面から入射された光が全反射面で内面反射されて出射面から出射されるタイプ（特許文献１の図４参照）がある。 The inner lens has an incident surface on which the light emitted from the light source is incident and an emitting surface on which the incident light is emitted, and the light incident from the incident surface is guided in a predetermined direction and emitted from the emitting surface. Has been made. In such an inner lens, in addition to the type in which the light incident from the incident surface travels straight and is emitted from the emitting surface (see FIGS. 1 and 2 of Patent Document 1), the light incident from the incident surface is included in such an inner lens. There is a type (see FIG. 4 of Patent Document 1) in which internal reflection is performed on all reflective surfaces and the light is emitted from the exit surface.
特開２０１７－２０８１９２号公報JP-A-2017-208192
　ところで、上記のような車輌用灯具においては、他の車輌の搭乗者や歩行者等の視認性の向上等を図るために、光を広範囲の領域へ向けて照射することが望まれる場合も多い。 By the way, in the above-mentioned vehicle lighting equipment, it is often desired to irradiate light toward a wide area in order to improve the visibility of passengers and pedestrians of other vehicles. ..
　ところが、特許文献１に記載されたようなインナーレンズを用いて、例えば、上下方向において光を広範囲の領域へ向けて照射する場合には、インナーレンズの全体を上下方向において厚みの厚い形状に形成する必要があるが、インナーレンズの厚みを厚くすると成形時間が長くなり製造コストが高くなってしまう。 However, when an inner lens as described in Patent Document 1 is used to irradiate light toward a wide area in the vertical direction, for example, the entire inner lens is formed into a thick shape in the vertical direction. However, if the inner lens is made thicker, the molding time becomes longer and the manufacturing cost becomes higher.
　そこで、本発明車輌用灯具は、製造コストの低減を図った上で光の広範囲の領域への照射を行うことを目的とする。 Therefore, the purpose of the vehicle lamp of the present invention is to irradiate a wide range of light with light while reducing the manufacturing cost.
　第１に、本発明に係る車輌用灯具は、光を出射する光源と、前記光源から出射される光が入射され入射された光を出射するインナーレンズとを備え、前記インナーレンズは入射された光を導く導光部と前記導光部に連続され少なくとも二つに分岐された形状に形成された分岐部とを有し、前記分岐部は第１の出射面を有する第１の部分と第２の出射面を有する第２の部分とによって構成され、前記導光部において導かれた光が前記分岐部において分離され前記第１の出射面と前記第２の出射面から出射されるものである。 First, the vehicle lighting equipment according to the present invention includes a light source that emits light and an inner lens that emits light that is incident and incident light emitted from the light source, and the inner lens is incident. It has a light guide portion that guides light and a branch portion that is continuous with the light guide portion and is formed in a shape that is branched into at least two, and the branch portion has a first portion having a first exit surface and a first portion. It is composed of a second portion having two emission surfaces, and the light guided by the light guide portion is separated at the branch portion and emitted from the first emission surface and the second emission surface. be.
　これにより、入射された光が導光部において分岐部へ向けて導かれ分岐部において分離されて第１の出射面と第２の出射面からそれぞれ出射される。 As a result, the incident light is guided toward the branch portion in the light guide portion, separated at the branch portion, and emitted from the first emission surface and the second emission surface, respectively.
　第２に、上記した本発明に係る車輌用灯具においては、前記第１の部分と前記第２の部分が上下に位置されることが望ましい。 Secondly, in the vehicle lamp according to the present invention described above, it is desirable that the first portion and the second portion are positioned vertically.
　これにより、分岐部からの光の照射範囲が上下方向において大きな範囲にされる。 As a result, the irradiation range of the light from the branch portion is set to a large range in the vertical direction.
　第３に、上記した本発明に係る車輌用灯具においては、前記インナーレンズには前記光源から出射される光を入射する入射面を有し入射された光を平行光にする入射制御部が設けられることが望ましい。 Thirdly, in the vehicle lamp according to the present invention described above, the inner lens is provided with an incident surface having an incident surface for incident light emitted from the light source and an incident control unit for making the incident light parallel light. It is desirable to be.
　これにより、光源から出射されインナーレンズに入射された光が入射制御部によって平行光にされて導光部で導かれる。 As a result, the light emitted from the light source and incident on the inner lens is converted into parallel light by the incident control unit and guided by the light guide unit.
　第４に、上記した本発明に係る車輌用灯具においては、前記導光部に入射された光を内面反射する全反射面が形成され、前記導光部には厚み方向において外側に突出され前記全反射面に連続する突起部が設けられることが望ましい。 Fourth, in the vehicle lamp according to the present invention described above, a total reflection surface that internally reflects the light incident on the light guide portion is formed, and the light guide portion projects outward in the thickness direction. It is desirable to provide continuous protrusions on all reflective surfaces.
　これにより、導光部の厚み方向において全反射面の端縁が面取りされた形状に形成されず、全反射面の有効な反射面積が大きくなる。 As a result, the edges of the total reflection surface are not formed in a chamfered shape in the thickness direction of the light guide portion, and the effective reflection area of the total reflection surface is increased.
　第５に、上記した本発明に係る車輌用灯具においては、前記第１の出射面と前記第２の出射面にそれぞれ拡散ステップが形成されることが望ましい。 Fifth, in the vehicle lamp according to the present invention described above, it is desirable that diffusion steps are formed on the first exit surface and the second exit surface, respectively.
　これにより、第１の出射面と第２の出射面からそれぞれ出射される光が拡散ステップによって拡散される。 As a result, the light emitted from the first exit surface and the second exit surface are diffused by the diffusion step.
　第６に、本発明に係る別の車輌用灯具は、光を出射する光源と、第１の入射面と第１の出射面を有し前記第１の入射面から入射された光を導いて前記第１の出射面から出射する第１の導光体と、第２の入射面と第２の出射面を有し前記第２の入射面から入射された光を導いて前記第２の出射面から出射する第２の導光体とを備え、前記光源から出射される光の各一部がそれぞれ前記第１の入射面と前記第２の入射面に入射されると共に前記第１の入射面と前記第２の入射面から入射される光量が異なるものである。 Sixth, another vehicle lamp according to the present invention has a light source that emits light, a first incident surface, and a first emitting surface, and guides the light incident from the first incident surface. It has a first light guide body that emits from the first exit surface, a second incident surface, and a second exit surface, and guides light incident from the second incident surface to guide the second exit surface. A second light guide body emitted from a surface is provided, and each part of the light emitted from the light source is incident on the first incident surface and the second incident surface, respectively, and the first incident surface. The amount of light incident from the surface and the second incident surface is different.
　これにより、一つの光源から光量の異なる光が第１の入射面と第２の入射面からそれぞれ第１の導光体と第２の導光体に入射される。 As a result, light having a different amount of light from one light source is incident on the first light guide body and the second light guide body from the first incident surface and the second incident surface, respectively.
　第７に、上記した本発明に係る別の車輌用灯具においては、前記第２の導光体における光の導光距離が前記第１の導光体における光の導光距離より長くされ、前記光源の発光中心が前記第１の入射面と前記第２の入射面の中央より前記第２の入射面側に位置されることが望ましい。 Seventh, in the other vehicle lighting equipment according to the present invention described above, the light guiding distance of the second light guide body is made longer than the light light guiding distance of the first light guide body. It is desirable that the light emitting center of the light source is located closer to the second incident surface side than the center of the first incident surface and the second incident surface.
　これにより、光源の発光中心が導光距離の長い第２の導光体における第２の入射面に寄った位置に存在する。 As a result, the light emitting center of the light source exists at a position closer to the second incident surface in the second light guide body having a long light guide distance.
　第８に、上記した本発明に係る別の車輌用灯具においては、前記第２の出射面の面積が前記第１の出射面の面積より大きくされ、前記光源の発光中心が前記第１の入射面と前記第２の入射面の中央より前記第２の入射面側に位置されることが望ましい。 Eighth, in the other vehicle lamp according to the present invention described above, the area of the second exit surface is made larger than the area of the first exit surface, and the light emitting center of the light source is the first incident surface. It is desirable that the surface is located closer to the second incident surface than the center of the surface and the second incident surface.
　これにより、光源の発光中心が光の出射面積の大きい第２の導光体における第２の入射面に寄った位置に存在する。 As a result, the light emitting center of the light source exists at a position closer to the second incident surface in the second light guide body having a large light emitting area.
　第９に、上記した本発明に係る別の車輌用灯具においては、前記第１の導光体又は前記第２の導光体の一方に位置決め突部が設けられ、前記位置決め突部が前記第１の導光体又は前記第２の導光体の他方に押し当てられた状態で前記第１の導光体と前記第２の導光体の位置決めが行われることが望ましい。 Ninth, in the other vehicle lamp according to the present invention described above, a positioning protrusion is provided on one of the first light guide body and the second light guide body, and the positioning protrusion is the second one. It is desirable that the first light guide body and the second light guide body are positioned while being pressed against the other of the light guide body 1 or the second light guide body.
　これにより、位置決め突部が第１の導光体又は前記第２の導光体の他方に押し当てられることにより第１の導光体と第２の導光体の位置決めが行われる。 As a result, the positioning protrusion is pressed against the first light guide body or the other of the second light guide bodies, so that the first light guide body and the second light guide body are positioned.
　第１０に、上記した本発明に係る別の車輌用灯具においては、前記第１の導光体と前記第２の導光体が保持されるインナーハウジングが設けられ、前記インナーハウジングに前記第１の導光体又は前記第２の導光体の一方をネジ止めにより取り付けるための取付ボスと前記第１の導光体又は前記第２の導光体の他方を支持する受け支持部とが設けられ、前記第１の導光体又は前記第２の導光体の一方が前記取付ボスにネジ止めされた状態において前記第１の導光体又は前記第２の導光体の他方が前記第１の導光体又は前記第２の導光体の一方に一方向へ押さえられ前記受け支持部に前記一方向と反対の他方向から受けられることが望ましい。 Tenth, in the other vehicle lighting fixture according to the present invention described above, an inner housing for holding the first light guide body and the second light guide body is provided, and the inner housing is provided with the first light guide body. A mounting boss for attaching one of the light guide body or the second light guide body by screwing and a receiving support portion for supporting the other of the first light guide body or the second light guide body are provided. Then, in a state where one of the first light guide body or the second light guide body is screwed to the mounting boss, the other of the first light guide body or the second light guide body is said to be the first. It is desirable that the light guide body of 1 or the second light guide body is pressed in one direction and is received by the receiving support portion from the other direction opposite to the one direction.
　これにより、位置決め突部が第１の導光体又は第２の導光体の他方に押し当てられ第１の導光体又は第２の導光体の一方が取付ボスにネジ止めされた状態において第１の導光体又は第２の導光体の他方が受け支持部に受けられるため、第１の導光体又は第２の導光体の他方がネジ止めされることなくインナーハウジングに取り付けられる。 As a result, the positioning protrusion is pressed against the other of the first light guide body or the second light guide body, and one of the first light guide body or the second light guide body is screwed to the mounting boss. Since the other of the first light guide body or the second light guide body is received by the receiving support portion, the other of the first light guide body or the second light guide body is attached to the inner housing without being screwed. It is attached.
　本発明によれば、入射された光が導光部において分岐部へ向けて導かれ分岐部において分離されて第１の出射面と第２の出射面からそれぞれ出射されるため、導光部と第１の部分と第２の部分を何れも厚みの薄い形状に形成することが可能になり、製造コストの低減を図った上で光の広範囲の領域への照射を行うことができる。 According to the present invention, the incident light is guided toward the branch portion in the light guide portion, separated at the branch portion, and emitted from the first emission surface and the second emission surface, respectively. Both the first portion and the second portion can be formed into a thin shape, and it is possible to irradiate a wide range of light with light while reducing the manufacturing cost.
図２乃至図１３と共に本発明車輌用灯具の実施の形態を示すものであり、本図は、カバーを分離した状態で示す車輌用灯具の斜視図である。2 to 13 show an embodiment of the vehicle lamp of the present invention, and this figure is a perspective view of the vehicle lamp with the cover separated. 灯具ユニットの分解斜視図である。It is an exploded perspective view of a lamp unit. 第１のインナーレンズ等を示す水平断面図である。It is a horizontal cross-sectional view which shows the 1st inner lens and the like. 第１のインナーレンズの斜視図である。It is a perspective view of the 1st inner lens. 第２のインナーレンズ等を示す垂直断面図である。It is a vertical cross-sectional view which shows the 2nd inner lens and the like. 第２のインナーレンズの斜視図である。It is a perspective view of the 2nd inner lens. 第２のインナーレンズ等を示す水平断面図である。It is a horizontal cross-sectional view which shows the 2nd inner lens and the like. 図７のＶＩＩＩ－ＶＩＩＩ線に沿う断面図である。FIG. 6 is a cross-sectional view taken along the line VIII-VIII of FIG. 第１の導光体と第２の導光体の斜視図である。It is a perspective view of the 1st light guide body and the 2nd light guide body. 第１の導光体と第２の導光体がインナーハウジングに取り付けられている状態を示す拡大断面図である。It is an enlarged cross-sectional view which shows the state which the 1st light guide body and the 2nd light guide body are attached to the inner housing. 第１の導光体と第２の導光体の第３の光源に対する位置関係を示す概念図である。It is a conceptual diagram which shows the positional relationship between the 1st light guide body and the 2nd light guide body with respect to a 3rd light source. 第１の光源から出射される光の経路を示す図である。It is a figure which shows the path of the light emitted from the 1st light source. 第２の光源から出射される光の経路を水平断面において示す図である。It is a figure which shows the path of the light emitted from the 2nd light source in the horizontal cross section. 第２の光源から出射される光の経路を垂直断面において示す図である。It is a figure which shows the path of the light emitted from the 2nd light source in the vertical cross section.
　以下に、本発明車輌用灯具を実施するための形態について添付図面を参照して説明する。 Hereinafter, a mode for implementing the vehicle lamp of the present invention will be described with reference to the attached drawings.
　車輌用灯具１は、例えば、車体の後端部における左右両端部に取り付けられ、車輌用標識灯として機能する。車輌用灯具１は、例えば、テールランプ、ストップランプ及びターンシグナルランプの機能を有するコンビネーションランプとして用いられる。 The vehicle lighting tool 1 is attached to both left and right ends of the rear end of the vehicle body, and functions as a vehicle indicator light, for example. The vehicle lamp 1 is used, for example, as a combination lamp having the functions of a tail lamp, a stop lamp, and a turn signal lamp.
　尚、以下には、車輌用灯具１からの光の出射方向を後方として前後上下左右の方向を説明する。但し、以下に示す前後上下左右の方向は説明の便宜上のものであり、本発明の実施に関しては、これらの方向に限定されることはない。 In the following, the front-back, up-down, left-right directions will be described with the light emission direction from the vehicle lamp 1 as the rear. However, the front-back, up-down, left-right directions shown below are for convenience of explanation, and the practice of the present invention is not limited to these directions.
　車輌用灯具１は後方から側方に亘る位置に開口を有するランプハウジング２とランプハウジング２の開口を閉塞するカバー３とを備えている（図１参照）。ランプハウジング２とカバー３によって灯具外筐４が構成され、灯具外筐４の内部空間が灯室として形成されている。 The vehicle lamp 1 includes a lamp housing 2 having an opening at a position extending from the rear to the side, and a cover 3 for closing the opening of the lamp housing 2 (see FIG. 1). The lamp housing 2 and the cover 3 form a lamp outer housing 4, and the internal space of the lamp outer housing 4 is formed as a lamp chamber.
　ランプハウジング２には後述する第１の光源と第２の光源と第３の光源が取り付けられている。カバー３には、例えば、内面に拡散ステップ３ａが形成されている。カバー３は、外周部が、例えば、黒色の材料によって形成された遮光部３ｂとして設けられ、遮光部３ｂの内側の部分が光の透過が可能な透過部３ｃとして設けられている。第１の光源と第２の光源と第３の光源から出射されカバー３の透過部を３ｃを透過される光は、拡散ステップ３ａによって拡散されて外部へ向けて照射される。 A first light source, a second light source, and a third light source, which will be described later, are attached to the lamp housing 2. The cover 3 is formed with, for example, a diffusion step 3a on the inner surface. The outer peripheral portion of the cover 3 is provided as, for example, a light-shielding portion 3b formed of a black material, and the inner portion of the light-shielding portion 3b is provided as a transmission portion 3c capable of transmitting light. The light emitted from the first light source, the second light source, and the third light source and transmitted through the transmitting portion of the cover 3 through 3c is diffused by the diffusion step 3a and irradiated to the outside.
　灯室には灯具ユニット５が配置されている。灯具ユニット５はインナーハウジング６に所要の各部が配置又は取り付けられて構成されている（図１及び図２参照）。 The lamp unit 5 is arranged in the lamp room. The lamp unit 5 is configured by arranging or attaching necessary parts to the inner housing 6 (see FIGS. 1 and 2).
　インナーハウジング６はランプハウジング２に取り付けられた状態で配置されている。インナーハウジング６は後部７と上部８と側部９を有し、後部７の上縁と上部８の後縁とが連続され、後部７の外側の側縁と側部９の後縁とが連続され、上部８の外側の側縁と側部９の上縁とが連続されている。 The inner housing 6 is arranged in a state of being attached to the lamp housing 2. The inner housing 6 has a rear portion 7, an upper portion 8, and a side portion 9, the upper edge of the rear portion 7 and the trailing edge of the upper portion 8 are continuous, and the outer side edge of the rear portion 7 and the trailing edge of the side portion 9 are continuous. The outer side edge of the upper portion 8 and the upper edge of the side portion 9 are continuous.
　後部７には第１の配置孔７ａと第２の配置孔７ｂが上下に並んで形成されている。後部７にはそれぞれ上下方向を向き第１の配置孔７ａにおける後側開口縁の下端から前方に突出された上側遮蔽板１０と第２の配置孔７ｂにおける後側開口縁の下端から前方に突出された下側遮蔽板１１とが設けられている。後部７には第１の配置孔７ａの上側に、後方に開口され左右に延びる第１の配置溝７ｃが形成されている。第１の配置孔７ａと第２の配置孔７ｂの側方から下方に亘る位置には、後方に開口され湾曲された第２の配置溝７ｄ、７ｄが略平行な状態で形成されている。 A first arrangement hole 7a and a second arrangement hole 7b are formed side by side in the rear portion 7. The upper shielding plate 10 is projected upward from the lower end of the rear opening edge in the first arrangement hole 7a and the rear portion 7 is projected forward from the lower end of the rear opening edge in the second arrangement hole 7b, respectively. The lower shielding plate 11 is provided. In the rear portion 7, a first arrangement groove 7c that is opened rearward and extends to the left and right is formed on the upper side of the first arrangement hole 7a. Second arrangement grooves 7d and 7d, which are opened rearward and curved, are formed in a substantially parallel state at positions extending downward from the side of the first arrangement hole 7a and the second arrangement hole 7b.
　上部８の前端部にはそれぞれ上方に突出された取付ボス１２と規制壁１３、１３と保持受け部１４と受け支持部１５が設けられている（図２の拡大図参照）。取付ボス１２には上方に開口された螺穴が形成されている。規制壁１３、１３は取付ボス１２の近傍において左右で対向した状態で位置されている。一方の規制壁１３は他方の規制壁１３より前後の幅が大きくされ、一方の規制壁１３には上方に開口された挿入用切欠１３ａが形成されている。保持受け部１４は規制壁１３、１３間に設けられ上方に開口された凹部を有する形状に形成されている。受け支持部１５は取付ボス１２の側方に位置され、上面が受け面１５ａとして下方に凸の緩やかな円弧面に形成されている。 The front end of the upper portion 8 is provided with a mounting boss 12, a regulating wall 13, 13 and a holding receiving portion 14 and a receiving supporting portion 15 projecting upward, respectively (see the enlarged view of FIG. 2). The mounting boss 12 is formed with a screw hole opened upward. The regulating walls 13 and 13 are positioned so as to face each other on the left and right in the vicinity of the mounting boss 12. The front and rear widths of one regulation wall 13 are larger than those of the other regulation wall 13, and an insertion notch 13a opened upward is formed in one regulation wall 13. The holding receiving portion 14 is provided between the regulation walls 13 and 13 and is formed in a shape having a recess opened upward. The receiving support portion 15 is located on the side of the mounting boss 12, and the upper surface is formed as a receiving surface 15a as a downwardly convex gentle arc surface.
　インナーハウジング６の第１の配置孔７ａには第１のインナーレンズ１６が挿入されて配置される（図２乃至図４参照）。第１のインナーレンズ１６は一部がネジ止めされることによりインナーハウジング６に取り付けられる。 The first inner lens 16 is inserted and arranged in the first arrangement hole 7a of the inner housing 6 (see FIGS. 2 to 4). The first inner lens 16 is attached to the inner housing 6 by being partially screwed.
　第１のインナーレンズ１６は、例えば、透明な樹脂材料によって形成されている。第１のインナーレンズ１６は、光が入射される入射部１７と、入射部１７の左右方向における外側の端部から後斜め側方に突出された板状の第１の反射部１８と、入射部１７の左右方向における内側の端部から後斜め側方に突出された板状の第２の反射部１９と、第１の反射部１８に連続され前後方向（光軸方向）に対して傾斜された板状の第１の出射部２０と、第２の反射部１９に連続され前後方向に対して傾斜された板状の第２の出射部２１とを有している。第１の反射部１８と第２の反射部１９は後方へ行くに従って左右方向において互いに離隔するように傾斜され、第１の出射部２０と第２の出射部２１も後方へ行くに従って左右方向において互いに離隔するように傾斜されている。 The first inner lens 16 is formed of, for example, a transparent resin material. The first inner lens 16 is incident on an incident portion 17 on which light is incident, and a plate-shaped first reflecting portion 18 projecting obliquely rearward from an outer end portion in the left-right direction of the incident portion 17. A plate-shaped second reflecting portion 19 projecting diagonally rearward from the inner end portion in the left-right direction of the portion 17, and a plate-shaped second reflecting portion 19 continuous with the first reflecting portion 18 and inclined with respect to the front-rear direction (optical axis direction). It has a plate-shaped first emitting portion 20 and a plate-shaped second emitting portion 21 which is continuous with the second reflecting portion 19 and is inclined in the front-rear direction. The first reflecting portion 18 and the second reflecting portion 19 are inclined so as to be separated from each other in the left-right direction toward the rear, and the first emitting portion 20 and the second emitting portion 21 are also inclined in the left-right direction toward the rear. It is tilted so as to separate from each other.
　入射部１７は後方に凸の形状に形成され、前面が入射面１７ａとして形成され、後面が出射面１７ｂとして形成されている（図３参照）。入射部１７における左右両側の部分の外周側の面はそれぞれ全反射面１７ｃ、１７ｃとして形成されている。 The incident portion 17 is formed in a convex shape rearward, the front surface is formed as an incident surface 17a, and the rear surface is formed as an exit surface 17b (see FIG. 3). The outer peripheral surfaces of the left and right side portions of the incident portion 17 are formed as total reflection surfaces 17c and 17c, respectively.
　第１の反射部１８と第２の反射部１９は後方へ行くに従って左右方向において互いに離隔する方向へ傾斜されている。第１の反射部１８と第２の反射部１９においては、第１の反射部１８の前後方向に対する傾斜角度Ｐ１が第２の反射部１９の前後方向に対する傾斜角度Ｐ２より大きくされている。 The first reflecting portion 18 and the second reflecting portion 19 are inclined in the left-right direction so as to be separated from each other toward the rear. In the first reflecting portion 18 and the second reflecting portion 19, the inclination angle P1 of the first reflecting portion 18 with respect to the front-rear direction is made larger than the inclination angle P2 of the second reflecting portion 19 with respect to the front-rear direction.
　また、第１の出射部２０と第２の出射部２１も後方へ行くに従って左右方向において互いに離隔する方向へ傾斜されている。第１の出射部２０と第２の出射部２１においては、第１の出射部２０の前後方向に対する傾斜角度Ｑ１が第２の出射部２１の前後方向に対する傾斜角度Ｑ２より大きくされている。 Further, the first exiting portion 20 and the second emitting portion 21 are also inclined in the left-right direction so as to be separated from each other as they go backward. In the first emission unit 20 and the second emission unit 21, the inclination angle Q1 of the first emission unit 20 with respect to the front-rear direction is larger than the inclination angle Q2 of the second emission unit 21 with respect to the front-rear direction.
　第１の出射部２０は、前側の面が全反射面２０ａとして形成され、後側の面が出射面２０ｂとして形成されている。尚、出射面２０ｂにおいては光の一部が内面反射される。第２の出射部２１は、前側の面が全反射面２１ａとして形成され、後側の面が出射面２１ｂとして形成されている。 The front surface of the first exit portion 20 is formed as a total reflection surface 20a, and the rear surface is formed as an exit surface 20b. A part of the light is internally reflected on the exit surface 20b. The front surface of the second exit portion 21 is formed as a total reflection surface 21a, and the rear surface is formed as an emission surface 21b.
　また、第１のインナーレンズ１６においては、第１の出射部２０の導光方向における長さＤ１が第２の出射部２１の導光方向における長さＤ２より短くされており、導光距離の相違に応じて全反射面２０ａと全反射面２１ａと出射面２０ｂと出射面２１ｂに形成されたステップのピッチが設定されている。具体的には、全反射面２０ａにおけるステップのピッチが全反射面２１ａにおけるステップのピッチより小さくされて両者のステップのピッチ数が略同じにされ、出射面２０ｂにおけるステップのピッチが出射面２１ｂにおけるステップのピッチより小さくされて両者のステップのピッチ数が略同じにされている。 Further, in the first inner lens 16, the length D1 of the first exiting portion 20 in the light guide direction is shorter than the length D2 of the second exit portion 21 in the light guide direction, and the light guide distance is increased. The pitch of the steps formed on the total reflection surface 20a, the total reflection surface 21a, the emission surface 20b, and the emission surface 21b is set according to the difference. Specifically, the pitch of the steps on the total reflection surface 20a is made smaller than the pitch of the steps on the total reflection surface 21a so that the number of pitches of both steps is substantially the same, and the pitch of the steps on the emission surface 20b is the pitch of the steps on the emission surface 21b. It is made smaller than the pitch of the steps so that the number of pitches of both steps is substantially the same.
　第１のインナーレンズ１６はインナーハウジング６に取り付けられた状態において、入射部１７の入射面１７ａがランプハウジング２に取り付けられた第１の光源２２における発光部２２ａの後側に対向して位置される（図３参照）。 When the first inner lens 16 is attached to the inner housing 6, the incident surface 17a of the incident portion 17 is positioned so as to face the rear side of the light emitting portion 22a of the first light source 22 attached to the lamp housing 2. (See Fig. 3).
　インナーハウジング６の第２の配置孔７ｂには第２のインナーレンズ２３が挿入されて配置される（図２、図５及び図６参照）。第２のインナーレンズ２３は一部がネジ止めされることによりインナーハウジング６に取り付けられる。 The second inner lens 23 is inserted and arranged in the second arrangement hole 7b of the inner housing 6 (see FIGS. 2, 5 and 6). The second inner lens 23 is attached to the inner housing 6 by being partially screwed.
　第２のインナーレンズ２３は、例えば、透明な樹脂材料によって形成されている。第２のインナーレンズ２３は光が入射される入射制御部２４と入射制御部２４に連続された導光部２５と導光部２５に連続され、例えば、二つに分岐された形状に形成された分岐部２６とを有している（図５乃至図７参照）。 The second inner lens 23 is made of, for example, a transparent resin material. The second inner lens 23 is continuous with the light guide unit 25 and the light guide unit 25, which are continuous with the incident control unit 24 and the incident control unit 24 on which light is incident, and are formed, for example, in a bifurcated shape. It has a branch portion 26 (see FIGS. 5 to 7).
　入射制御部２４は厚み方向が上下方向にされた板状に形成され、前面が前方に凸の円弧面状に形成された中央入射部２７と中央入射部２７の左右両側に設けられたサイド入射部２８、２８とを有している。中央入射部２７の前面は入射面２７ａとして形成されている。サイド入射部２８、２８は前方に凸の先細りの形状に形成され、入射面２７ａに連続する側の面がそれぞれ入射面２８ａ、２８ａとして形成され、入射面２８ａ、２８ａを挟んで入射面２７ａの反対側に位置する面がそれぞれ全反射面２８ｂ、２８ｂとして形成されている。 The incident control unit 24 is formed in a plate shape with the thickness direction in the vertical direction, and the central incident portion 27 having an arcuate surface whose front surface is convex forward and side incidents provided on both the left and right sides of the central incident portion 27. It has parts 28 and 28. The front surface of the central incident portion 27 is formed as an incident surface 27a. The side incident portions 28, 28 are formed in a tapered shape that is convex forward, and the surfaces on the side continuous with the incident surface 27a are formed as the incident surfaces 28a, 28a, respectively, and the incident surfaces 27a sandwich the incident surfaces 28a, 28a. The surfaces located on the opposite sides are formed as total reflection surfaces 28b and 28b, respectively.
　導光部２５は厚み方向が上下方向にされた板状に形成され、略左右に延びる形状に形成されている。導光部２５は一方の全反射面２８ｂの後端に連続する傾斜面を有し、この傾斜面が第１の全反射面２５ａとして形成されている。導光部２５の前面は第２の全反射面２５ｂとして形成されている。 The light guide portion 25 is formed in a plate shape having a thickness direction in the vertical direction, and is formed in a shape extending substantially to the left and right. The light guide portion 25 has a continuous inclined surface at the rear end of one of the total reflection surfaces 28b, and this inclined surface is formed as the first total reflection surface 25a. The front surface of the light guide portion 25 is formed as a second total reflection surface 25b.
　導光部２５には上方又は下方に突出された突起部２９、２９が設けられている（図８参照）。突起部２９、２９は第１の全反射面２５ａに連続する位置に設けられている。 The light guide portion 25 is provided with protrusions 29, 29 protruding upward or downward (see FIG. 8). The protrusions 29, 29 are provided at positions continuous with the first total reflection surface 25a.
　第２のインナーレンズ２３は射出成形による成形時間の短縮化を図るために全体の厚みが薄く形成されており、その分、第１の全反射面２５ａの上下の幅が小さくなり易い。特に、成形上、稜線が形成される部分は面取りされて所謂Ｃ面やＲ面として形成されることが多く、第１の全反射面２５ａの上端と導光部２５の上面との境界部分や第１の全反射面２５ａの下端と導光部２５の下面との境界部分は面取りされた形状に形成されることがある。 The second inner lens 23 is formed to have a thin overall thickness in order to shorten the molding time by injection molding, and the vertical width of the first total reflection surface 25a tends to be reduced accordingly. In particular, in molding, the portion where the ridge line is formed is often chamfered to form a so-called C surface or R surface, and the boundary portion between the upper end of the first total reflection surface 25a and the upper surface of the light guide portion 25 and the like. The boundary portion between the lower end of the first total reflection surface 25a and the lower surface of the light guide portion 25 may be formed in a chamfered shape.
　従って、これらの場合には、第１の全反射面２５ａの反射領域が小さくなるおそれがあるが、上記したように、第１の全反射面２５ａに連続する位置に突起部２９、２９が設けられることにより、導光部２５の厚み方向において第１の全反射面２５ａの端縁が面取りされた形状に形成されない。これにより、第１の全反射面２５ａの有効な反射面積が大きくなり、第２のインナーレンズ２３に入射された光の利用効率の向上を図ることができる。 Therefore, in these cases, the reflection region of the first total reflection surface 25a may become small, but as described above, the protrusions 29 and 29 are provided at positions continuous with the first total reflection surface 25a. As a result, the edge of the first total reflection surface 25a is not formed in a chamfered shape in the thickness direction of the light guide portion 25. As a result, the effective reflection area of the first total reflection surface 25a is increased, and the utilization efficiency of the light incident on the second inner lens 23 can be improved.
　尚、上記には、第１の全反射面２５ａに連続する位置に突起部２９、２９が設けられた例を示したが、第２の全反射面２５ｂに連続する位置に突起部が設けられ、第２のインナーレンズ２３に入射された光の利用効率の向上が図られてもよい。 Although the above shows an example in which the protrusions 29 and 29 are provided at positions continuous with the first total reflection surface 25a, the protrusions are provided at positions continuous with the second total reflection surface 25b. , The utilization efficiency of the light incident on the second inner lens 23 may be improved.
　分岐部２６は上下方向において分岐された二股状に形成され、導光部２５の後端部に連続されている（図５及び図６参照）。分岐部２６は後方へ行くに従って上方に変位するように傾斜された第１の部分３０と後方へ行くに従って下方に変位するように傾斜された第２の部分３１とによって構成されている。但し、分岐部２６は三つ以上に分岐された形状に形成されていてもよい。 The branch portion 26 is formed in a bifurcated shape branched in the vertical direction and is continuous with the rear end portion of the light guide portion 25 (see FIGS. 5 and 6). The branch portion 26 is composed of a first portion 30 inclined so as to be displaced upward toward the rear and a second portion 31 inclined so as to be displaced downward toward the rear. However, the branch portion 26 may be formed in a shape branched into three or more.
　第１の部分３０は横長の形状に形成され、後側の面のうち下側の部分が第１の全反射傾斜面３０ａとして形成され、前側の面のうち上端部を除く部分が第２の全反射傾斜面３０ｂとして形成されている。第１の部分３０の後側の面のうち第１の全反射傾斜面３０ａの上側の部分は第１の出射面３０ｃとして形成されている。 The first portion 30 is formed in a horizontally long shape, the lower portion of the rear surface is formed as the first total reflection inclined surface 30a, and the portion of the front surface excluding the upper end is the second. It is formed as a total reflection inclined surface 30b. Of the rear surface of the first portion 30, the upper portion of the first total reflection inclined surface 30a is formed as the first exit surface 30c.
　第２の部分３１は横長の形状に形成され、後側の面のうち上側の部分が第１の全反射傾斜面３１ａとして形成され、前側の面のうち下端部を除く部分が第２の全反射傾斜面３１ｂとして形成されている。第２の部分３１の後側の面のうち第１の全反射傾斜面３１ａの下側の部分は第２の出射面３１ｃとして形成されている。 The second portion 31 is formed in a horizontally long shape, the upper portion of the rear surface is formed as the first total reflection inclined surface 31a, and the portion of the front surface excluding the lower end is the second total. It is formed as a reflection inclined surface 31b. Of the rear surfaces of the second portion 31, the lower portion of the first total reflection inclined surface 31a is formed as the second exit surface 31c.
　第１の出射面３０ｃと第２の出射面３１ｃにはそれぞれ拡散ステップとして、例えば、魚眼ステップが形成されている。第１の出射面３０ｃと第２の出射面３１ｃから出射される光はそれぞれ魚眼ステップによって上下方向及び左右方向へ拡散される。 For example, a fisheye step is formed as a diffusion step on each of the first exit surface 30c and the second exit surface 31c. The light emitted from the first exit surface 30c and the second exit surface 31c is diffused in the vertical direction and the horizontal direction by the fisheye step, respectively.
　第２のインナーレンズ２３はインナーハウジング６に取り付けられた状態において、入射制御部２４の入射面２７ａがランプハウジング２に取り付けられた第２の光源３２における発光部３２ａの後側に対向して位置される（図７参照）。 When the second inner lens 23 is attached to the inner housing 6, the incident surface 27a of the incident control unit 24 is positioned so as to face the rear side of the light emitting unit 32a of the second light source 32 attached to the lamp housing 2. (See FIG. 7).
　インナーハウジング６の第１の配置溝７ｃには第１の導光体３３の一部を除いた部分が挿入されて配置される（図２参照）。第１の導光体３３は一部がネジ止めされることによりインナーハウジング６に取り付けられる。 A portion of the inner housing 6 excluding a part of the first light guide 33 is inserted and arranged in the first arrangement groove 7c (see FIG. 2). The first light guide body 33 is attached to the inner housing 6 by being partially screwed.
　第１の導光体３３は、例えば、透明な樹脂材料によって略Ｌ字状に形成されている（図９参照）。第１の導光体３３は、所定の形状の略丸軸状に形成された軸状導光部３４と軸状導光部３４の軸方向における一端部から突出された腕部３５と腕部３５に連続された被取付部３６と軸状導光部３４の一部を除いた部分から下方に突出されたひれ状の出光部３７とを有している。 The first light guide 33 is formed in a substantially L shape by, for example, a transparent resin material (see FIG. 9). The first light guide body 33 is a shaft-shaped light guide 34 formed in a substantially round shaft shape having a predetermined shape, and an arm 35 and an arm protruding from one end in the axial direction of the shaft light guide 34. It has a attached portion 36 continuous with 35 and a fin-shaped light emitting portion 37 protruding downward from a portion excluding a part of the shaft-shaped light guide portion 34.
　軸状導光部３４は略前後方向に延びる始端部３８と始端部３８に対して屈曲され略左右方向に延びる出射部３９とから成り、出射部３９の軸方向における長さが始端部３８の軸方向における長さより長くされている。軸状導光部３４は、始端部３８の先端面が第１の入射面３８ａとして形成され、出射部３９の後側の面が第１の出射面３９ａとして形成されている。また、出光部３７の後面も第１の出射面３７ａとして形成されている。 The axial light guide portion 34 is composed of a start end portion 38 extending substantially in the front-rear direction and an exit portion 39 bent with respect to the start end portion 38 and extending substantially in the left-right direction, and the length of the exit portion 39 in the axial direction is the start end portion 38. It is longer than the axial length. In the axial light guide portion 34, the front end surface of the starting end portion 38 is formed as the first incident surface 38a, and the rear surface of the emitting portion 39 is formed as the first exit surface 39a. Further, the rear surface of the light emitting portion 37 is also formed as a first emitting surface 37a.
　第１の導光体３３には始端部３８から下方に突出された位置決め突部４０が設けられ、位置決め突部４０は下面が押さえ面４０ａとして上方に凸の緩やかな円弧面に形成されている。 The first light guide body 33 is provided with a positioning protrusion 40 projecting downward from the start end portion 38, and the lower surface of the positioning protrusion 40 is formed as a pressing surface 40a on a gentle arc surface that is convex upward. ..
　インナーハウジング６の第２の配置溝７ｄ、７ｄには第２の導光体４１の一部を除いた部分が挿入されて配置される（図２参照）。第２の導光体４１は一部が第１の導光体３３に押さえられることによりインナーハウジング６に取り付けられる。 A portion of the inner housing 6 excluding a part of the second light guide body 41 is inserted and arranged in the second arrangement grooves 7d and 7d (see FIG. 2). The second light guide body 41 is attached to the inner housing 6 by being partially pressed by the first light guide body 33.
　第２の導光体４１は、例えば、透明な樹脂材料によって全体として環状に形成されている（図９参照）。第２の導光体４１は、所定の形状の略丸軸状に形成された一対の軸状導光部４２、４２と軸状導光部４２、４２の軸方向における一端部に連続する共有部４３と共有部４３から突出された被規制部４４と軸状導光部４２、４２の軸方向における他端部を連結する連結部４５とを有している。 The second light guide body 41 is formed in an annular shape as a whole by, for example, a transparent resin material (see FIG. 9). The second light guide body 41 is shared by a pair of shaft-shaped light guide portions 42, 42 formed in a substantially round shaft shape having a predetermined shape and one end portion of the shaft-shaped light guide portions 42, 42 in the axial direction. It has a portion 43, a regulated portion 44 protruding from the common portion 43, and a connecting portion 45 that connects the other ends of the axial light guide portions 42, 42 in the axial direction.
　軸状導光部４２は共有部４３に連続する部分が湾曲された始端部４６として設けられ始端部４６に連続する部分が始端部４６とは反対方向に湾曲された出射部４７として設けられ、出射部４７の後側の面が第２の出射面４７ａとして形成されている。出射部４７は軸方向における長さが始端部４６の軸方向における長さより長くされている。 The shaft-shaped light guide portion 42 is provided as a start end portion 46 in which a portion continuous with the common portion 43 is curved, and a portion continuous with the start end portion 46 is provided as an exit portion 47 curved in the direction opposite to the start end portion 46. The rear surface of the exit portion 47 is formed as a second exit surface 47a. The length of the exit portion 47 in the axial direction is longer than the length of the start end portion 46 in the axial direction.
　共有部４３は始端部４６、４６が延長されるように始端部４６、４６と略同じ径の丸軸状に形成され、先端面が第２の入射面４３ａとして形成されている。 The common portion 43 is formed in a round shaft shape having substantially the same diameter as the start end portions 46, 46 so that the start end portions 46, 46 are extended, and the tip surface is formed as a second incident surface 43a.
　上記のように構成された第１の導光体３３と第２の導光体４１においては、第２の導光体４１の導光距離が第１の導光体３３の導光距離より長くされている。第１の導光体３３の導光距離は軸状導光部３４の軸方向における長さに相当し、第２の導光体４１の導光距離は軸状導光部４２、４２の軸方向における長さと共有部４３の軸方向における長さとの合計分に相当する。また、軸状導光部３４の長さは一つの軸状導光部４２と共有部４３の軸方向における長さとの合計の長さより短くされている。 In the first light guide body 33 and the second light guide body 41 configured as described above, the light guide distance of the second light guide body 41 is longer than the light guide distance of the first light guide body 33. Has been done. The light guide distance of the first light guide body 33 corresponds to the length of the axial light guide unit 34 in the axial direction, and the light guide distance of the second light guide body 41 is the axis of the axial light guide portions 42, 42. It corresponds to the total of the length in the direction and the length in the axial direction of the common portion 43. Further, the length of the shaft-shaped light guide portion 34 is shorter than the total length of the length of one shaft-shaped light guide portion 42 and the length of the shared portion 43 in the axial direction.
　このように第２の導光体４１の導光距離が第１の導光体３３の導光距離より長くされているため、第２の導光体４１と第１の導光体３３においてそれぞれ光が出射されるときの輝度を同程度の輝度にするためには、第２の導光体４１の第２の入射面４３ａから入射される光量が第１の導光体３３の第１の入射面３８ａから入射される光量より大きくされる必要がある。 Since the light guide distance of the second light guide body 41 is longer than the light guide distance of the first light guide body 33 in this way, the second light guide body 41 and the first light guide body 33, respectively. In order to make the brightness when the light is emitted to the same level, the amount of light incident from the second incident surface 43a of the second light guide 41 is the first of the first light guide 33. It needs to be larger than the amount of light incident from the incident surface 38a.
　また、第１の導光体３３と第２の導光体４１においては、第２の導光体４１における光の出射面積が第１の導光体３３における光の出射面積より大きくされている。第１の導光体３３における光の出射面積は第１の出射面３７ａの面積と第１の出射面３９ａの面積との合計分に相当し、第２の導光体４１における光の出射面積は第２の出射面４７ａ、４７ａの面積の合計分に相当する。 Further, in the first light guide body 33 and the second light guide body 41, the light emission area of the second light guide 41 is larger than the light emission area of the first light guide 33. .. The light emitting area of the first light guide 33 corresponds to the total area of the first light emitting surface 37a and the area of the first light emitting surface 39a, and the light emitting area of the second light guide 41. Corresponds to the total area of the second exit surfaces 47a and 47a.
　このように第２の導光体４１における光の出射面積が第１の導光体３３における光の出射面積より大きくされているため、第２の導光体４１と第１の導光体３３においてそれぞれ光が出射されるときの輝度を同程度の輝度にするためには、第２の導光体４１の第２の入射面４３ａから入射される光量が第１の導光体３３の第１の入射面３８ａから入射される光量より大きくされる必要がある。 Since the light emitting area of the second light guide body 41 is made larger than the light emitting area of the first light guide body 33 in this way, the second light guide body 41 and the first light guide body 33 In order to make the brightness when light is emitted to the same level, the amount of light incident from the second incident surface 43a of the second light guide 41 is the first light guide 33. It needs to be larger than the amount of light incident from the incident surface 38a of 1.
　上記のように構成された第２の導光体４１は、軸状導光部４２、４２の出射部４７、４７がそれぞれインナーハウジング６の第２の配置溝７ｄ、７ｄに挿入されて配置され、共有部４３がインナーハウジング６の規制壁１３、１３間に上方から挿入されて保持受け部１４の凹部に挿入されて保持される（図１０参照）。共有部４３が規制壁１３、１３間に挿入されて保持受け部１４に保持されることにより、第２の導光体４１の左右方向及び上下方向における位置決めが行われる。 The second light guide body 41 configured as described above is arranged by inserting the exit portions 47, 47 of the axial light guide portions 42, 42 into the second arrangement grooves 7d, 7d of the inner housing 6, respectively. The common portion 43 is inserted between the regulation walls 13 and 13 of the inner housing 6 from above and is inserted into the recess of the holding receiving portion 14 to be held (see FIG. 10). The common portion 43 is inserted between the regulation walls 13 and 13 and held by the holding receiving portion 14, so that the second light guide body 41 is positioned in the left-right direction and the up-down direction.
　このとき共有部４３から突出された被規制部４４が一方の規制壁１３に形成された挿入用切欠１３ａに上方から挿入され、第２の導光体４１の前後方向における位置決めが行われる。また、共有部４３はインナーハウジング６の受け支持部１５に載置される。 At this time, the regulated portion 44 protruding from the common portion 43 is inserted into the insertion notch 13a formed in one of the regulating walls 13 from above, and the second light guide body 41 is positioned in the front-rear direction. Further, the common portion 43 is placed on the receiving support portion 15 of the inner housing 6.
　上記のように第２の導光体４１がインナーハウジング６に保持された状態において、第１の導光体３３の出光部３７と出射部３９がインナーハウジング６の第１の配置溝７ｃに挿入されて配置される。第１の導光体３３は始端部３８と腕部３５と被取付部３６がインナーハウジング６における上部８の上面側に位置され、被取付部３６がネジ止め等によって取付ボス１２に取り付けられる。 In the state where the second light guide body 41 is held by the inner housing 6 as described above, the light emitting portion 37 and the emitting portion 39 of the first light guide body 33 are inserted into the first arrangement groove 7c of the inner housing 6. And placed. In the first light guide body 33, the starting end portion 38, the arm portion 35, and the attached portion 36 are located on the upper surface side of the upper portion 8 of the inner housing 6, and the attached portion 36 is attached to the attachment boss 12 by screwing or the like.
　被取付部３６が取付ボス１２に取り付けられた状態において、第１の導光体３３の始端部３８が第２の導光体４１における始端部４６の真上に位置され、始端部４６が第１の導光体３３の位置決め突部４０によって上方から押さえられる。このとき位置決め突部４０の押さえ面４０ａによって始端部４６の外周面のうち上端側の部分が押さえられ、始端部４６の外周面のうち下端側の部分が受け支持部１５の受け面１５ａに押し付けられ始端部４６が受け支持部１５に下方から受けられる。従って、第２の導光体４１の上下方向における位置決めが行われると共に第１の導光体３３と第２の導光体４１の間の位置決めが行われる。 In a state where the attached portion 36 is attached to the attachment boss 12, the start end portion 38 of the first light guide body 33 is positioned directly above the start end portion 46 of the second light guide body 41, and the start end portion 46 is the second. It is pressed from above by the positioning protrusion 40 of the light guide body 33 of 1. At this time, the upper end side portion of the outer peripheral surface of the start end portion 46 is pressed by the pressing surface 40a of the positioning protrusion 40, and the lower end side portion of the outer peripheral surface of the start end portion 46 is pressed against the receiving surface 15a of the receiving support portion 15. The start end portion 46 is received by the receiving support portion 15 from below. Therefore, the second light guide body 41 is positioned in the vertical direction, and the position between the first light guide body 33 and the second light guide body 41 is performed.
　第２の導光体４１の始端部４６が第１の導光体３３の位置決め突部４０によって上方から押さえられた状態においては、位置決め突部４０における上方に凸の円弧面状に形成された押さえ面４０ａが始端部４６における円弧面状の外周面に押し付けられると共に始端部４６における円弧面状の外周面が受け支持部１５における下方に凸の円弧面状に形成された受け面１５ａに押し付けられる。従って、第１の導光体３３と第２の導光体４１がガタ付くことなく安定した状態でインナーハウジング６に保持される。 In a state where the starting end portion 46 of the second light guide body 41 is pressed from above by the positioning protrusion 40 of the first light guide 33, the second light guide body 41 is formed in an upwardly convex arcuate surface shape in the positioning protrusion 40. The pressing surface 40a is pressed against the arcuate outer peripheral surface of the starting end portion 46, and the arcuate outer peripheral surface of the starting end portion 46 is pressed against the receiving surface 15a formed in the receiving support portion 15 in a downwardly convex arcuate shape. Be done. Therefore, the first light guide body 33 and the second light guide body 41 are held in the inner housing 6 in a stable state without rattling.
　上記したように、車輌用灯具１においては、位置決め突部４０が第２の導光体４１に押し当てられた状態で第１の導光体３３と第２の導光体４１の位置決めが行われる。 As described above, in the vehicle lamp 1, the first light guide 33 and the second light guide 41 are positioned while the positioning protrusion 40 is pressed against the second light guide 41. Will be.
　従って、位置決め突部４０が第２の導光体４１に押し当てられることにより第１の導光体３３と第２の導光体４１の位置決めが行われるため、簡素な構成により容易に第１の導光体３３と第２の導光体４１の間の高い位置精度を確保することができる。 Therefore, since the positioning protrusion 40 is pressed against the second light guide body 41 to position the first light guide body 33 and the second light guide body 41, the first light guide body 33 can be easily positioned by a simple configuration. High positional accuracy between the light guide 33 and the second light guide 41 can be ensured.
　尚、上記には、第１の導光体３３に下方に突出された位置決め突部４０が設けられ位置決め突部４０が第２の導光体４１に押し当てられる構成を示したが、逆に、第２の導光体４１に上方に突出された位置決め突部が設けられ位置決め突部に第１の導光体３３が押し当てられる構成にされてもよい。 In the above description, the first light guide body 33 is provided with a positioning protrusion 40 projecting downward, and the positioning protrusion 40 is pressed against the second light guide body 41. The second light guide body 41 may be provided with a positioning protrusion protruding upward, and the first light guide body 33 may be pressed against the positioning protrusion.
　また、車輌用灯具１においては、インナーハウジング６に第１の導光体３３をネジ止めにより取り付けるための取付ボス１２と第２の導光体４１を支持する受け支持部１５とが設けられ、第１の導光体３３が取付ボス１２にネジ止めされた状態において第２の導光体４１が第１の導光体３３に一方向（下方）へ押さえられ受け支持部１５に一方向（下方）から受けられる。 Further, in the vehicle lamp 1, the inner housing 6 is provided with a mounting boss 12 for mounting the first light guide 33 by screwing and a receiving support portion 15 for supporting the second light guide 41. In a state where the first light guide body 33 is screwed to the mounting boss 12, the second light guide body 41 is pressed in one direction (downward) by the first light guide body 33 and unidirectionally by the receiving support portion 15 (downward). Can be received from below).
　従って、位置決め突部４０が第２の導光体４１に押し当てられ第１の導光体３３が取付ボス１２にネジ止めされた状態において第２の導光体４１が受け支持部１５に受けられるため、第２の導光体４１がネジ止めされることなくインナーハウジング６に取り付けられ、第１の導光体３３と第２の導光体４１をインナーハウジング６に簡素な構成によって確実に取り付けることができる。 Therefore, the second light guide body 41 receives the receiving support portion 15 in a state where the positioning protrusion 40 is pressed against the second light guide body 41 and the first light guide body 33 is screwed to the mounting boss 12. Therefore, the second light guide body 41 is attached to the inner housing 6 without being screwed, and the first light guide body 33 and the second light guide body 41 are securely attached to the inner housing 6 by a simple configuration. Can be attached.
　上記のように第１の導光体３３と第２の導光体４１がインナーハウジング６に取り付けられた状態において、第１の入射面３８ａと第２の入射面４３ａがランプハウジング２に取り付けられた第３の光源４８における発光部４８ａの後側に位置される（図１１参照）。このとき第３の光源４８は発光部４８ａの発光中心４８ｂが第１の入射面３８ａと第２の入射面４３ａの中央より第２の入射面４３ａ側に位置される。例えば、第３の光源４８は発光中心４８ｂが第１の入射面３８ａの中心Ｓ１と第２の入射面４３ａの中心Ｓ２との間において第２の入射面４３ａに対向した位置に存在する。 In a state where the first light guide body 33 and the second light guide body 41 are attached to the inner housing 6 as described above, the first incident surface 38a and the second incident surface 43a are attached to the lamp housing 2. It is located behind the light emitting portion 48a of the third light source 48 (see FIG. 11). At this time, in the third light source 48, the light emitting center 48b of the light emitting unit 48a is located on the second incident surface 43a side from the center of the first incident surface 38a and the second incident surface 43a. For example, the third light source 48 exists at a position where the light emitting center 48b faces the second incident surface 43a between the center S1 of the first incident surface 38a and the center S2 of the second incident surface 43a.
　このように第３の光源４８の発光中心４８ｂが第１の入射面３８ａと第２の入射面４３ａの中央より第２の入射面４３ａ側に位置されることにより、第３の光源４８から出射された光は第１の入射面３８ａから第１の導光体３３に入射されると共に第２の入射面４３ａから第２の導光体４１に入射されるが、第１の入射面３８ａと第２の入射面４３ａから入射される光量が異なり、第２の入射面４３ａから入射される光量が第１の入射面３８ａから入射される光量より大きくなる。 As described above, the light emitting center 48b of the third light source 48 is located on the second incident surface 43a side from the center of the first incident surface 38a and the second incident surface 43a, so that the light is emitted from the third light source 48. The light is incident on the first light guide 33 from the first incident surface 38a and is incident on the second light guide 41 from the second incident surface 43a, but with the first incident surface 38a. The amount of light incident from the second incident surface 43a is different, and the amount of light incident from the second incident surface 43a is larger than the amount of light incident from the first incident surface 38a.
　上記のように第１の導光体３３と第２の導光体４１がインナーハウジング６に取り付けられた状態においては、インナーハウジング６に後側からインナーカバー４９が取り付けられ、インナーカバー４９によって第１の導光体３３と第２の導光体４１の各一部が覆われる（図１及び図２参照）。 In the state where the first light guide body 33 and the second light guide body 41 are attached to the inner housing 6 as described above, the inner cover 49 is attached to the inner housing 6 from the rear side, and the inner cover 49 is used to attach the inner cover 49 to the inner housing 6. Each part of the light guide body 33 of No. 1 and the light guide body 41 of the second light guide body 41 is covered (see FIGS. 1 and 2).
　インナーカバー４９は左右方向に延びる第１の覆い部４９ａと第１の覆い部４９ａの長手方向における一端部に連続され湾曲された第２の覆い部４９ｂと第１の覆い部４９ａの上端部から前方に突出された天面部４９ｃとを有している。インナーカバー４９は第１の覆い部４９ａと第２の覆い部４９ｂの略全体が光を透過する材料によって形成され天面部４９ｃが光を透過しない材料によって形成されている。インナーカバー４９は、天面部４９ｃが上部８の上面側に位置された状態でインナーハウジング６に取り付けられる。 The inner cover 49 extends from the upper ends of the first cover portion 49a extending in the left-right direction, the second cover portion 49b and the first cover portion 49a which are continuously curved at one end in the longitudinal direction of the first cover portion 49a. It has a top surface portion 49c protruding forward. In the inner cover 49, substantially the entire first cover portion 49a and the second cover portion 49b are formed of a material that transmits light, and the top surface portion 49c is formed of a material that does not transmit light. The inner cover 49 is attached to the inner housing 6 with the top surface portion 49c positioned on the upper surface side of the upper portion 8.
　インナーカバー４９がインナーハウジング６に取り付けられた状態においては、第１の導光体３３の出光部３７と出射部３９が第１の覆い部４９ａによって後方から覆われ、第２の導光体４１の出射部４７が第２の覆い部４９ｂによって後方から覆われる。従って、第１の導光体３３の出光部３７と出射部３９から出射された光は第１の覆い部４９ａを透過して後方へ向けて照射され、第２の導光体４１の出射部４７、４７から出射された光は第２の覆い部４９ｂを透過して後方へ向けて照射される。また、天面部４９ｃによって第１の導光体３３から上方側へ漏れ出す不要な光が遮蔽される。 In the state where the inner cover 49 is attached to the inner housing 6, the light emitting portion 37 and the emitting portion 39 of the first light guide body 33 are covered from the rear by the first cover portion 49a, and the second light guide body 41 The emitting portion 47 of the above is covered from the rear by the second covering portion 49b. Therefore, the light emitted from the light emitting portion 37 and the emitting portion 39 of the first light guide body 33 passes through the first covering portion 49a and is irradiated backward, and the light emitted from the second light guide body 41 is emitted. The light emitted from 47 and 47 passes through the second covering portion 49b and is irradiated backward. Further, the top surface portion 49c shields unnecessary light leaking upward from the first light guide body 33.
　また、第１の導光体３３と第２の導光体４１がインナーハウジング６に取り付けられた状態においては、インナーハウジング６に上側から遮蔽カバー５０が取り付けられる。遮蔽カバー５０は光を透過しない材料によって形成され、第１の導光体３３における始端部３８の略全体と第２の導光体４１における始端部４６の略全体とを上方から覆う状態でインナーハウジング６に取り付けられている。従って、遮蔽カバー５０によって第１の導光体３３の始端部３８と第２の導光体４１の始端部４６とから漏れ出す不要な光が遮蔽される。 Further, in a state where the first light guide body 33 and the second light guide body 41 are attached to the inner housing 6, the shielding cover 50 is attached to the inner housing 6 from above. The shielding cover 50 is formed of a material that does not transmit light, and covers substantially the entire starting end 38 of the first light guide 33 and substantially the entire starting end 46 of the second light guide 41 from above. It is attached to the housing 6. Therefore, the shielding cover 50 shields unnecessary light leaking from the starting end 38 of the first light guide 33 and the starting end 46 of the second light guide 41.
　インナーハウジング６にはインナーカバー４９の内側においてエクステンション５１が取り付けられる。エクステンション５１は黒色の樹脂材料によって各部が一体に形成されて成り、枠部５２と仕切部５３を有している。枠部５２は第１の覆い部４９ａと第２の覆い部４９ｂによって形成されたインナーカバー４９における内側の空間に対応する大きさ及び形状に形成されている。仕切部５３は枠部５２を上下で仕切り左右方向に延びる形状に形成されている。従って、エクステンション５１には仕切部５３の上下にそれぞれ上側空間５１ａと下側空間５１ｂが形成されている。 An extension 51 is attached to the inner housing 6 inside the inner cover 49. Each portion of the extension 51 is integrally formed of a black resin material, and has a frame portion 52 and a partition portion 53. The frame portion 52 is formed in a size and shape corresponding to the inner space of the inner cover 49 formed by the first cover portion 49a and the second cover portion 49b. The partition portion 53 is formed in a shape in which the frame portion 52 is vertically partitioned and extends in the left-right direction. Therefore, the extension 51 is formed with an upper space 51a and a lower space 51b above and below the partition portion 53, respectively.
　エクステンション５１には上側空間５１ａの上側開口縁から前方に突出された上側遮蔽部５４と上側空間５１ａの下側開口縁から前方に突出された下側遮蔽部５５とが設けられている。 The extension 51 is provided with an upper shielding portion 54 projecting forward from the upper opening edge of the upper space 51a and a lower shielding portion 55 projecting forward from the lower opening edge of the upper space 51a.
　エクステンション５１がインナーハウジング６に取り付けられた状態においては、枠部５２が第１のインナーレンズ１６と第２のインナーレンズ２３を外周側から囲む位置に配置され、仕切部５３が第１のインナーレンズ１６と第２のインナーレンズ２３の間に配置される（図１参照）。また、上側遮蔽部５４と下側遮蔽部５５は外周縁が第１のインナーレンズ１６の第１の出射部２０と第２の出射部２１に沿って位置される。従って、エクステンション５１によって第１のインナーレンズ１６と第２のインナーレンズ２３の間や外周側に隙間が生じ難くなり、外部から視認されたときに灯室に配置された各部がエクステンション５１によって遮蔽され、被視認性の向上が図られる。 In the state where the extension 51 is attached to the inner housing 6, the frame portion 52 is arranged at a position surrounding the first inner lens 16 and the second inner lens 23 from the outer peripheral side, and the partition portion 53 is the first inner lens. It is arranged between the 16 and the second inner lens 23 (see FIG. 1). Further, the outer peripheral edges of the upper shielding portion 54 and the lower shielding portion 55 are positioned along the first emitting portion 20 and the second emitting portion 21 of the first inner lens 16. Therefore, the extension 51 makes it difficult for a gap to be formed between the first inner lens 16 and the second inner lens 23 or on the outer peripheral side, and each part arranged in the lamp chamber is shielded by the extension 51 when visually recognized from the outside. , The visibility is improved.
　上記のように第１のインナーレンズ１６と第２のインナーレンズ２３と第１の導光体３３と第２の導光体４１とインナーカバー４９とエクステンション５１が取り付けられたインナーハウジング６は灯室に配置され、ランプハウジング２にカバー３が取り付けられることにより車輌用灯具１が構成される（図１参照）。車輌用灯具１は車体に取り付けられ、カバー３は車体の形状に応じて左右方向において車輌の内側から外側へ行くに従って前方に変位するように傾斜した状態で配置される（図３及び図７参照）。 As described above, the inner housing 6 to which the first inner lens 16, the second inner lens 23, the first light guide 33, the second light guide 41, the inner cover 49, and the extension 51 are attached is a lamp chamber. A vehicle lamp 1 is configured by attaching the cover 3 to the lamp housing 2 (see FIG. 1). The vehicle lamp 1 is attached to the vehicle body, and the cover 3 is arranged in an inclined state so as to be displaced forward from the inside to the outside of the vehicle in the left-right direction according to the shape of the vehicle body (see FIGS. 3 and 7). ).
　このとき、上記したように、第１のインナーレンズ１６においては、第１の出射部２０と第２の出射部２１が後方へ行くに従って左右方向において互いに離隔する方向へ傾斜され、第１の出射部２０の前後方向に対する傾斜角度Ｑ１が第２の出射部２１の前後方向に対する傾斜角度Ｑ２より大きくされている（図３参照）。 At this time, as described above, in the first inner lens 16. The inclination angle Q1 of the portion 20 with respect to the front-rear direction is made larger than the inclination angle Q2 of the second exit portion 21 with respect to the front-rear direction (see FIG. 3).
　このようにカバー３が左右方向に対して傾斜されると共に第１の出射部２０の前後方向に対する傾斜角度Ｑ１が第２の出射部２１の前後方向に対する傾斜角度Ｑ２より大きくされているため、カバー３から第１の出射部２０までの距離がカバー３から第２の出射部２１までの距離と略同じにされている。 In this way, the cover 3 is tilted in the left-right direction, and the tilt angle Q1 of the first exit portion 20 with respect to the front-rear direction is larger than the tilt angle Q2 of the second exit portion 21 with respect to the front-rear direction. The distance from the third to the first exit portion 20 is substantially the same as the distance from the cover 3 to the second exit portion 21.
　具体的には、カバー３から第１の出射部２０までの最短距離Ｌ１ａとカバー３から第２の出射部２１までの最短距離Ｌ２ａとが略同じにされ、カバー３から第１の出射部２０までの最長距離Ｌ１ｂとカバー３から第２の出射部２１までの最長距離Ｌ２ｂとが略同じにされている。また、カバー３から第１の出射部２０の導光方向における中央部までの距離Ｌ１ｃがカバー３から第２の出射部２１の導光方向における中央部までの距離Ｌ２ｃとが略同じにされている。 Specifically, the shortest distance L1a from the cover 3 to the first emitting portion 20 and the shortest distance L2a from the cover 3 to the second emitting portion 21 are made substantially the same, and the shortest distance L2a from the cover 3 to the first emitting portion 20 is made substantially the same. The longest distance L1b up to and the longest distance L2b from the cover 3 to the second exit portion 21 are substantially the same. Further, the distance L1c from the cover 3 to the central portion in the light guide direction of the first exit portion 20 is substantially the same as the distance L2c from the cover 3 to the central portion in the light guide direction of the second exit portion 21. There is.
　上記のように構成された車輌用灯具１において、第１の光源２２の発光部２２ａから光が出射されると、出射された光は入射面１７ａから第１のインナーレンズ１６の入射部１７に入射される（図１２参照）。入射部１７に入射された光は一部を除いて出射面１７ｂから出射され、カバー３の透過部３ｃを透過されて外部へ向けて照射される。 In the vehicle lamp 1 configured as described above, when light is emitted from the light emitting portion 22a of the first light source 22, the emitted light is emitted from the incident surface 17a to the incident portion 17 of the first inner lens 16. It is incident (see FIG. 12). The light incident on the incident portion 17 is emitted from the emitting surface 17b except for a part thereof, is transmitted through the transmitting portion 3c of the cover 3, and is irradiated to the outside.
　一方、入射部１７に入射された光の一部は全反射面１７ｃ、１７ｃで内面反射され、それぞれ第１の反射部１８と第２の反射部１９へ向かう。 On the other hand, a part of the light incident on the incident portion 17 is internally reflected by the total reflection surfaces 17c and 17c, and goes to the first reflection portion 18 and the second reflection portion 19, respectively.
　第１の反射部１８へ向かった光は第１の反射部１８で内面反射され、第１の出射部２０の全反射面２０ａで内面反射され出射面２０ｂから出射され、カバー３の透過部３ｃを透過されて外部へ向けて照射される。また、第２の反射部１９へ向かった光は第２の反射部１９で内面反射され、第２の出射部２１の全反射面２１ａで内面反射され出射面２１ｂから出射され、カバー３の透過部３ｃを透過されて外部へ向けて照射される。 The light directed to the first reflecting portion 18 is internally reflected by the first reflecting portion 18, is internally reflected by the total reflection surface 20a of the first emitting portion 20, is emitted from the emitting surface 20b, and is emitted from the transmitting portion 3c of the cover 3. Is transmitted and irradiated to the outside. Further, the light directed to the second reflecting portion 19 is internally reflected by the second reflecting portion 19, internally reflected by the total reflection surface 21a of the second emitting portion 21, emitted from the emitting surface 21b, and transmitted through the cover 3. Part 3c is transmitted and irradiated to the outside.
　このとき、第１のインナーレンズ１６においては、上記したように、第１の反射部１８と第２の反射部１９が前後方向に対してそれぞれ所定の角度で傾斜され、第１の出射部２０と第２の出射部２１も前後方向に対してそれぞれ所定の角度で傾斜されており、第１の反射部１８で内面反射される光の反射角度θ１と第２の反射部１９で内面反射される光の反射角度θ２とが異なるようにされている（図３参照）。 At this time, in the first inner lens 16, as described above, the first reflecting portion 18 and the second reflecting portion 19 are inclined at predetermined angles with respect to the front-rear direction, respectively, and the first emitting portion 20 And the second exiting portion 21 are also inclined at predetermined angles with respect to the front-rear direction, and the light reflected internally by the first reflecting portion 18 is reflected internally by the reflection angle θ1 and the second reflecting portion 19. The reflection angle θ2 of the light is different from that of the light (see FIG. 3).
　具体的には、第１の反射部１８での反射角度θ１が第２の反射部１９での反射角度θ２より小さく、第１の反射部１８で内面反射された光と第２の反射部１９で内面反射された光とがそれぞれ第１の出射部２０の全反射面２０ａと第２の出射部２１の全反射面２１ａに全反射可能な角度で適正に到達するようにされている。 Specifically, the reflection angle θ1 at the first reflection unit 18 is smaller than the reflection angle θ2 at the second reflection unit 19, and the light internally reflected by the first reflection unit 18 and the second reflection unit 19 The light reflected on the inner surface is appropriately reached at an angle at which the total reflection surface 20a of the first emission unit 20 and the total reflection surface 21a of the second emission unit 21 can be totally reflected, respectively.
　また、第１のインナーレンズ１６においては、上記したように、全反射面２０ａにおけるステップのピッチが全反射面２１ａにおけるステップのピッチより小さくされ、出射面２０ｂにおけるステップのピッチが出射面２１ｂにおけるステップのピッチより小さくされている。 Further, in the first inner lens 16, as described above, the step pitch on the total reflection surface 20a is made smaller than the step pitch on the total reflection surface 21a, and the step pitch on the emission surface 20b is the step pitch on the emission surface 21b. It is smaller than the pitch of.
　さらに、カバー３と第１のインナーレンズ１６の距離の関係おいては、上記したように、カバー３から第１の出射部２０までの距離がカバー３から第２の出射部２１までの距離と略同じにされている。 Further, regarding the relationship between the distance between the cover 3 and the first inner lens 16, as described above, the distance from the cover 3 to the first exit portion 20 is the distance from the cover 3 to the second exit portion 21. It is almost the same.
　第１のインナーレンズ１６とカバー３は上記のような構成及び位置関係にされているため、第１の出射部２０の出射面２０ｂから出射された光と第２の出射部２１の出射面２１ｂから出射された光とが、カバー３の透過部３ｃを透過されて略同じ輝度で後方へ向けて照射される。 Since the first inner lens 16 and the cover 3 have the above-mentioned configuration and positional relationship, the light emitted from the emission surface 20b of the first emission unit 20 and the emission surface 21b of the second emission unit 21 The light emitted from the cover 3 is transmitted through the transmitting portion 3c of the cover 3 and is irradiated backward with substantially the same brightness.
　従って、カバー３が左右方向に対して傾斜され所謂スラントされている場合においても、第１のインナーレンズ１６から出射されカバー３の透過部３ｃを透過されて後方へ向けて照射される光の輝度が略均一にされ、輝度ムラの抑制された光が照射され、視認性の向上を図ることができる。 Therefore, even when the cover 3 is tilted in the left-right direction and is so-called slanted, the brightness of the light emitted from the first inner lens 16, transmitted through the transmitting portion 3c of the cover 3, and emitted backward. Is substantially uniform and is irradiated with light in which uneven brightness is suppressed, so that visibility can be improved.
　また、第１のインナーレンズ１６においては、第１の出射部２０と第２の出射部２１が前後方向に対してそれぞれ所定の角度で傾斜されており、第２の出射部２１の前後方向に対する傾斜角度が第１の出射部２０の前後方向に対する傾斜角度より小さくされている。 Further, in the first inner lens 16, the first emitting portion 20 and the second emitting portion 21 are inclined at predetermined angles with respect to the front-rear direction, respectively, with respect to the front-rear direction of the second emitting portion 21. The tilt angle is smaller than the tilt angle of the first exit portion 20 with respect to the front-rear direction.
　従って、第２の出射部２１の後端部がカバー３に近付いて位置されており、その分、エクステンション５１における枠部５２の一端部５２ａの前後方向における幅Ｈが短くされている（図３参照）。これにより、エクステンション５１に付された色（黒色）が前後方向において大きな幅で視認されることがなく、外部から車輌用灯具１の内部が視認されたときの被視認性の向上を図ることができる。 Therefore, the rear end portion of the second exit portion 21 is positioned close to the cover 3, and the width H of the one end portion 52a of the frame portion 52 in the extension 51 in the front-rear direction is shortened accordingly (FIG. 3). reference). As a result, the color (black) attached to the extension 51 is not visually recognized with a large width in the front-rear direction, and the visibility when the inside of the vehicle lamp 1 is visually recognized from the outside can be improved. can.
　一方、第２の光源３２の発光部３２ａから光が出射されると、出射された光は入射面２７ａ、２８ａ、２８ａから第２のインナーレンズ２３の入射制御部２４に入射される（図１３参照）。入射制御部２４の入射面２７ａから入射された光は入射面２７ａで制御されて平行光にされ、入射制御部２４の入射面２８ａ、２８ａからそれぞれ入射された光は全反射面２８ｂ、２８ｂで内面反射されて制御され平行光にされる。従って、入射制御部２４に入射された全ての光が平行光にされて導光部２５の第１の全反射面２５ａへ向かう。 On the other hand, when light is emitted from the light emitting unit 32a of the second light source 32, the emitted light is incident on the incident control unit 24 of the second inner lens 23 from the incident surfaces 27a, 28a, 28a (FIG. 13). reference). The light incident from the incident surface 27a of the incident control unit 24 is controlled by the incident surface 27a to be parallel light, and the light incident from the incident surfaces 28a and 28a of the incident control unit 24 is controlled by the total reflection surfaces 28b and 28b, respectively. It is internally reflected and controlled to be parallel light. Therefore, all the light incident on the incident control unit 24 is made into parallel light and heads toward the first total reflection surface 25a of the light guide unit 25.
　第１の全反射面２５ａへ向かった光は第１の全反射面２５ａで内面反射され、引き続き第２の全反射面２５ｂで内面反射される（図１３及び図１４参照）。第２の全反射面２５ｂで内面反射された光は導光部２５によって分岐部２６へ向けて導かれ、第１の部分３０と第２の部分３１に分離される（図１４参照）。 Light directed toward the first total reflection surface 25a is internally reflected by the first total reflection surface 25a, and subsequently internally reflected by the second total reflection surface 25b (see FIGS. 13 and 14). The light internally reflected by the second total reflection surface 25b is guided toward the branch portion 26 by the light guide portion 25 and separated into the first portion 30 and the second portion 31 (see FIG. 14).
　第１の部分３０に導かれた光は順に第１の全反射傾斜面３０ａと第２の全反射傾斜面３０ｂで内面反射され、第１の出射面３０ｃから出射され、カバー３の透過部３ｃを透過されて外部へ向けて照射される。また、第２の部分３１に導かれた光は順に第１の全反射傾斜面３１ａと第２の全反射傾斜面３１ｂで内面反射され、第２の出射面３１ｃから出射され、カバー３の透過部３ｃを透過されて外部へ向けて照射される。 The light guided to the first portion 30 is internally reflected by the first total reflection inclined surface 30a and the second total reflection inclined surface 30b, emitted from the first exit surface 30c, and is emitted from the first emission surface 30c, and is emitted from the transmission portion 3c of the cover 3. Is transmitted and irradiated to the outside. Further, the light guided to the second portion 31 is internally reflected by the first total reflection inclined surface 31a and the second total reflection inclined surface 31b, emitted from the second exit surface 31c, and transmitted through the cover 3. Part 3c is transmitted and irradiated to the outside.
　上記したように、第２のインナーレンズ２３は入射された光を導く導光部２５と導光部２５に連続され二股状に形成された分岐部２６とを有し、分岐部２６は第１の出射面３０ｃを有する第１の部分３０と第２の出射面３１ｃを有する第２の部分３１とによって構成され、導光部２５において導かれた光が分岐部２６において分離され第１の出射面３０ｃと第２の出射面３１ｃから出射される。 As described above, the second inner lens 23 has a light guide portion 25 that guides the incident light and a bifurcated branch portion 26 that is continuous with the light guide portion 25, and the branch portion 26 is the first. It is composed of a first portion 30 having an exit surface 30c and a second portion 31 having a second exit surface 31c, and the light guided by the light guide portion 25 is separated at the branch portion 26 to emit the first light. It is emitted from the surface 30c and the second exit surface 31c.
　従って、第２のインナーレンズ２３に入射された光が導光部２５において分岐部２６へ向けて導かれ分岐部２６において分離されて第１の出射面３０ｃと第２の出射面３１ｃからそれぞれ出射される。これにより導光部２５と第１の部分３０と第２の部分３１を何れも厚みの薄い形状に形成することが可能になり、広範囲への照射を厚みの厚いインナーレンズを用いて行う必要がなく、製造コストの低減を図った上で光の広範囲の領域への照射を行うことができる。 Therefore, the light incident on the second inner lens 23 is guided toward the branch portion 26 by the light guide portion 25, separated at the branch portion 26, and emitted from the first emission surface 30c and the second emission surface 31c, respectively. Will be done. As a result, the light guide portion 25, the first portion 30, and the second portion 31 can all be formed into a thin shape, and it is necessary to irradiate a wide range with a thick inner lens. Therefore, it is possible to irradiate a wide range of light with the aim of reducing the manufacturing cost.
　また、溶融樹脂を用いた射出成形によって第２のインナーレンズ２３を形成する場合に、第２のインナーレンズ２３の厚みが厚くなるとキャビティへの溶融樹脂の充填後の冷却時にヒケが発生し易くなり、第２のインナーレンズ２３の成形精度が低下するおそれがあるが、第２のインナーレンズ２３の各部の厚みを薄くすることが可能であるため、第２のインナーレンズ２３の成形精度の向上を図った上で光の広範囲の領域への照射を行うことができる。 Further, when the second inner lens 23 is formed by injection molding using a molten resin, if the thickness of the second inner lens 23 becomes thicker, sink marks are likely to occur during cooling after the cavity is filled with the molten resin. , The molding accuracy of the second inner lens 23 may decrease, but since it is possible to reduce the thickness of each part of the second inner lens 23, the molding accuracy of the second inner lens 23 can be improved. It is possible to irradiate a wide range of light with a plan.
　さらに、第１の部分３０と第２の部分３１が上下に位置されているため、分岐部２６からの光の照射範囲が上下方向において大きな範囲にされ、車体の形状に応じて導光部２５を上下方向において薄型の形状にした上で光の所望の照射状態を確保することができる。 Further, since the first portion 30 and the second portion 31 are located vertically, the irradiation range of the light from the branch portion 26 is set to a large range in the vertical direction, and the light guide portion 25 is arranged according to the shape of the vehicle body. It is possible to secure a desired irradiation state of light after making the shape thin in the vertical direction.
　さらにまた、第２のインナーレンズ２３には入射された光を平行光にする入射制御部２４が設けられている。 Furthermore, the second inner lens 23 is provided with an incident control unit 24 that converts the incident light into parallel light.
　従って、第２の光源３２から出射され第２のインナーレンズ２３に入射された光が入射制御部２４によって平行光にされて導光部２５で導かれるため、導光部２５から分岐部２６へ向かう光の導光制御が容易になり、光の利用効率の向上を図った上で所望の方向へ光を照射することができる。 Therefore, the light emitted from the second light source 32 and incident on the second inner lens 23 is converted into parallel light by the incident control unit 24 and guided by the light guide unit 25, so that the light is guided from the light guide unit 25 to the branch unit 26. The light source control of the heading light becomes easy, and the light can be irradiated in a desired direction after improving the light utilization efficiency.
　加えて、第２のインナーレンズ２３の第１の出射面３０ｃと第２の出射面３１ｃにそれぞれ拡散ステップ、例えば、魚眼ステップが形成されている。 In addition, a diffusion step, for example, a fisheye step, is formed on the first exit surface 30c and the second exit surface 31c of the second inner lens 23, respectively.
　従って、第１の出射面３０ｃと第２の出射面３１ｃからそれぞれ出射される光が拡散ステップによって拡散されるため、第１の出射面３０ｃと第２の出射面３１ｃから輝度ムラが抑制された光を広範囲の領域へ向けて照射することができる。 Therefore, since the light emitted from the first emission surface 30c and the second emission surface 31c is diffused by the diffusion step, the brightness unevenness is suppressed from the first emission surface 30c and the second emission surface 31c. Light can be directed over a wide area.
　車輌用灯具１において、第３の光源４８の発光部４８ａから光が出射されると、出射された光は第１の入射面３８ａと第２の入射面４３ａからそれぞれ第１の導光体３３の始端部３８と第２の導光体４１の共有部４３に入射される。 In the vehicle lamp 1, when light is emitted from the light emitting portion 48a of the third light source 48, the emitted light is the first light guide body 33 from the first incident surface 38a and the second incident surface 43a, respectively. It is incident on the common portion 43 of the start end portion 38 and the second light guide body 41.
　このとき、上記したように、第３の光源４８の発光中心４８ｂが第１の入射面３８ａと第２の入射面４３ａの中央より第２の入射面４３ａ側に位置されているため、第２の入射面４３ａから入射される光量が第１の入射面３８ａから入射される光量より大きい。 At this time, as described above, since the light emitting center 48b of the third light source 48 is located on the second incident surface 43a side from the center of the first incident surface 38a and the second incident surface 43a, the second The amount of light incident from the incident surface 43a is larger than the amount of light incident from the first incident surface 38a.
　第１の導光体３３の始端部３８に入射された光は軸状導光部３４で導光され出光部３７の第１の出射面３７ａと出射部３９の第１の出射面３９ａから出射され、カバー３の透過部３ｃを透過されて外部へ向けて照射される。一方、第２の導光体４１の共有部４３に入射された光は軸状導光部４２で導光され出射部４７、４７の第２の出射面４７ａ、４７ａからそれぞれ出射され、カバー３の透過部３ｃを透過されて外部へ向けて照射される。 The light incident on the start end portion 38 of the first light guide body 33 is guided by the axial light guide portion 34 and emitted from the first emission surface 37a of the light emission portion 37 and the first emission surface 39a of the emission portion 39. Then, it is transmitted through the transmitting portion 3c of the cover 3 and irradiated to the outside. On the other hand, the light incident on the common portion 43 of the second light guide body 41 is guided by the axial light guide portion 42 and emitted from the second exit surfaces 47a and 47a of the exit portions 47 and 47, respectively, and the cover 3 It is transmitted to the outside through the transmitting portion 3c of the above.
　ところで、車輌用灯具には、カバーとランプハウジングによって構成された灯具外筐の内部に複数の光源と導光体が配置され、各光源からそれぞれ出射された光が第１の導光体と第２の導光体によって導かれ第１の導光体の出射面と第２の導光体の出射面とからそれぞれ外部へ向けて照射されるタイプがある（例えば、特開２０１７－１８３１４３号公報参照）。 By the way, in a vehicle lamp, a plurality of light sources and light guides are arranged inside a lamp outer housing composed of a cover and a lamp housing, and the light emitted from each light source is the first light guide and the first light guide. There is a type that is guided by the light guide body 2 and is irradiated outward from the emission surface of the first light guide body and the emission surface of the second light guide body (for example, Japanese Patent Application Laid-Open No. 2017-183143). reference).
　このような二つの導光体を用いてそれぞれ光を出射させる構成においては、光が各導光体によってそれぞれ所望の位置まで導かれて出射されるため、光を広範囲の領域へ向けて照射することが可能にされている。 In such a configuration in which two light guide bodies are used to emit light, the light is guided to a desired position by each light guide body and emitted, so that the light is irradiated to a wide range. Is made possible.
　ところが、上記のような構成においては、二つの導光体の形状や大きさが相違し各導光体における光の導光距離や出射面積が異なる場合も多く、同じ光源を用いると二つの導光体から出射される光の輝度が相違して輝度ムラを生じるおそれがある。 However, in the above configuration, the shapes and sizes of the two light guide bodies are different, and the light guide distance and the emission area of the light in each light guide body are often different. There is a risk that the brightness of the light emitted from the light body will be different and uneven brightness will occur.
　一方、このような輝度ムラの発生を防止するために、第１の導光体と第２の導光体に対して出射光量が異なる光源を用いたり、各光源からの出射光量を異なるように制御する制御回路を設けることが可能であるが、これらの場合には異なる光源や制御回路を設ける分、車輌用灯具の製造コストの高騰を来すおそれがある。 On the other hand, in order to prevent the occurrence of such uneven brightness, light sources having different amounts of emitted light from the first light guide body and the second light guide body may be used, or the amount of emitted light from each light source may be different. It is possible to provide a control circuit for control, but in these cases, the provision of different light sources and control circuits may lead to an increase in the manufacturing cost of vehicle lamps.
　そこで、上記のように、車輌用灯具１においては、一つの第３の光源４８から光量の異なる光がそれぞれ第１の入射面３８ａと第２の入射面４３ａに入射されるため、第１の導光体３３と第２の導光体４１に対して出射光量が異なる光源を用いたり、各光源からの出射光量を異なるように制御する制御回路を設ける必要がなく、製造コストの高騰を来すことなく輝度ムラを抑制することができる。 Therefore, as described above, in the vehicle lighting tool 1, light having a different amount of light from one third light source 48 is incident on the first incident surface 38a and the second incident surface 43a, respectively, so that the first It is not necessary to use light sources having different amounts of emitted light for the light guide body 33 and the second light guide body 41, or to provide a control circuit for controlling the amount of emitted light from each light source so as to increase the manufacturing cost. Brightness unevenness can be suppressed without any trouble.
　また、第２の導光体４１における光の導光距離が第１の導光体３３における光の導光距離より長くされ、第３の光源４８の発光中心４８ｂが第１の入射面３８ａと第２の入射面４３ａの中央より第２の入射面４３ａ側に位置されている。 Further, the light guide distance of the second light guide 41 is made longer than the light guide distance of the first light guide 33, and the light emitting center 48b of the third light source 48 is aligned with the first incident surface 38a. It is located closer to the second incident surface 43a than the center of the second incident surface 43a.
　従って、第３の光源４８の発光中心４８ｂが導光距離の長い第２の導光体４１における第２の入射面４３ａに寄った位置に存在するため、第１の出射面３７ａ、３９ａから出射される光の輝度と第２の出射面４７ａ、４７ａから出射される光の輝度との差を低減して輝度ムラの抑制された照明状態を確保することができる。 Therefore, since the light emitting center 48b of the third light source 48 is located at a position closer to the second incident surface 43a in the second light guide body 41 having a long light guide distance, the light is emitted from the first exit surfaces 37a and 39a. It is possible to reduce the difference between the brightness of the light to be emitted and the brightness of the light emitted from the second exit surfaces 47a and 47a to ensure an illumination state in which uneven brightness is suppressed.
　さらに、第２の出射面４７ａ、４７ａの合計の面積が第１の出射面３７ａ、３９ａの合計の面積より大きくされ、第３の光源４８の発光中心４８ｂが第１の入射面３８ａと第２の入射面４３ａの中央より第２の入射面４３ａ側に位置されている。 Further, the total area of the second exit surfaces 47a and 47a is made larger than the total area of the first exit surfaces 37a and 39a, and the light emitting center 48b of the third light source 48 is the first incident surface 38a and the second. It is located on the second incident surface 43a side from the center of the incident surface 43a.
　従って、第３の光源４８の発光中心４８ｂが光の出射面積の大きい第２の導光体４１における第２の入射面４３ａに寄った位置に存在するため、第１の出射面３７ａ、３９ａから出射される光の輝度と第２の出射面４７ａ、４７ａから出射される光の輝度との差を低減して輝度ムラの抑制された照明状態を確保することができる。 Therefore, since the light emitting center 48b of the third light source 48 is located at a position closer to the second incident surface 43a in the second light guide body 41 having a large light emitting area, from the first emitting surfaces 37a and 39a. It is possible to reduce the difference between the brightness of the emitted light and the brightness of the light emitted from the second exit surfaces 47a and 47a to ensure an illumination state in which uneven brightness is suppressed.
　尚、第１の光源２２と第２の光源３２と第３の光源４８としては、例えば、発光ダイオード（ＬＥＤ：Light Emitting Diode）が発光部２２ａ、３２ａ、４８ａとして用いられ、発光部２２ａ、３２ａ、４８ａを搭載する基板がハウジングに取り付けられた所謂ＬＥＤソケットと称される構成が使用されている。 As the first light source 22, the second light source 32, and the third light source 48, for example, a light emitting diode (LED: Light Emitting Diode) is used as the light emitting units 22a, 32a, 48a, and the light emitting units 22a, 32a. , A so-called LED socket in which a substrate on which the 48a is mounted is attached to a housing is used.
　このようなＬＥＤソケットが、例えば、ストップランプ等に用いられる場合には、複数のＬＥＤが搭載されることが多いため、インナーレンズや導光体に入射される光の制御が難しい場合があり、この場合にはインナーレンズや導光体から光が漏れてしまうおそれがある。 When such an LED socket is used for, for example, a stop lamp or the like, a plurality of LEDs are often mounted, so that it may be difficult to control the light incident on the inner lens or the light guide body. In this case, light may leak from the inner lens or the light guide.
　そこで、例えば、第２のインナーレンズ２３のように第１の全反射面２５ａで反射された光を外部へ向けて照射される光として使用し、第１の全反射面２５ａをエクステンション５１によって覆うことにより、車輌用灯具１の外部への光漏れを抑制することが可能にされている。 Therefore, for example, the light reflected by the first total reflection surface 25a like the second inner lens 23 is used as the light to be irradiated to the outside, and the first total reflection surface 25a is covered by the extension 51. This makes it possible to suppress light leakage to the outside of the vehicle lighting fixture 1.
　１…車輌用灯具、６…インナーハウジング、１２…取付ボス、１５…受け支持部、２３…第２のインナーレンズ、２４…入射制御部、２５…導光部、２５ａ…第１の全反射面、２６…分岐部、２９…突起部、３０…第１の部分、３０ｃ…第１の出射面、３１…第２の部分、３１ｃ…第２の出射面、３２…第２の光源、３３…第１の導光体、３７ａ…第１の出射面、３８ａ…第１の入射面、３９ａ…第１の出射面、４０…位置決め突部、４１…第２の導光体、４７ａ…第２の出射面、４８…第３の光源、４８ｂ…発光中心 1 ... Vehicle lighting, 6 ... Inner housing, 12 ... Mounting boss, 15 ... Receiving support, 23 ... Second inner lens, 24 ... Incident control, 25 ... Light guide, 25a ... First total reflection surface , 26 ... branch, 29 ... protrusion, 30 ... first part, 30c ... first exit surface, 31 ... second part, 31c ... second exit surface, 32 ... second light source, 33 ... First light guide, 37a ... first exit surface, 38a ... first incident surface, 39a ... first exit surface, 40 ... positioning protrusion, 41 ... second light guide, 47a ... second Emission surface, 48 ... Third light source, 48b ... Emission center

Claims (10)

  1. 　光を出射する光源と、
    　前記光源から出射される光が入射され入射された光を出射するインナーレンズとを備え、
    　前記インナーレンズは入射された光を導く導光部と前記導光部に連続され少なくとも二つに分岐された形状に形成された分岐部とを有し、
    　前記分岐部は第１の出射面を有する第１の部分と第２の出射面を有する第２の部分とによって構成され、
    　前記導光部において導かれた光が前記分岐部において分離され前記第１の出射面と前記第２の出射面から出射される
    　車輌用灯具。     A light source that emits light and
    It is provided with an inner lens in which light emitted from the light source is incident and emits the incident light.
    The inner lens has a light guide portion that guides incident light and a branch portion that is continuous with the light guide portion and is formed in a shape that is branched into at least two.
    The branch portion is composed of a first portion having a first exit surface and a second portion having a second exit surface.
    A vehicle lamp in which the light guided by the light guide portion is separated at the branch portion and emitted from the first emission surface and the second emission surface.
  2. 　前記第１の部分と前記第２の部分が上下に位置された
    　請求項１に記載の車輌用灯具。     The vehicle lamp according to claim 1, wherein the first portion and the second portion are positioned vertically.
  3. 　前記インナーレンズには前記光源から出射される光を入射する入射面を有し入射された光を平行光にする入射制御部が設けられた
    　請求項１又は請求項２に記載の車輌用灯具。     The vehicle lamp according to claim 1 or 2, wherein the inner lens has an incident surface for incident light emitted from the light source, and an incident control unit for making the incident light parallel light is provided.
  4. 　前記導光部に入射された光を内面反射する全反射面が形成され、
    　前記導光部には厚み方向において外側に突出され前記全反射面に連続する突起部が設けられた
    　請求項１、請求項２又は請求項３に記載の車輌用灯具。     A total reflection surface that internally reflects the light incident on the light guide is formed.
    The vehicle lamp according to claim 1, claim 2 or claim 3, wherein the light guide portion is provided with a protrusion portion that protrudes outward in the thickness direction and is continuous with the total reflection surface.
  5. 　前記第１の出射面と前記第２の出射面にそれぞれ拡散ステップが形成された
    　請求項１、請求項２、請求項３又は請求項４に記載の車輌用灯具。     The vehicle lamp according to claim 1, claim 2, claim 3 or claim 4, wherein diffusion steps are formed on the first exit surface and the second exit surface, respectively.
  6. 　光を出射する光源と、
    　第１の入射面と第１の出射面を有し前記第１の入射面から入射された光を導いて前記第１の出射面から出射する第１の導光体と、
    　第２の入射面と第２の出射面を有し前記第２の入射面から入射された光を導いて前記第２の出射面から出射する第２の導光体とを備え、
    　前記光源から出射される光の各一部がそれぞれ前記第１の入射面と前記第２の入射面に入射されると共に前記第１の入射面と前記第２の入射面から入射される光量が異なる
    　車輌用灯具。     A light source that emits light and
    A first light guide body having a first incident surface and a first emitting surface, guiding light incident from the first incident surface, and emitting light from the first emitting surface.
    It is provided with a second light guide body having a second incident surface and a second emitting surface, guiding light incident from the second incident surface, and emitting light from the second emitting surface.
    Each part of the light emitted from the light source is incident on the first incident surface and the second incident surface, and the amount of light incident from the first incident surface and the second incident surface is Lights for different vehicles.
  7. 　前記第２の導光体における光の導光距離が前記第１の導光体における光の導光距離より長くされ、
    　前記光源の発光中心が前記第１の入射面と前記第２の入射面の中央より前記第２の入射面側に位置された
    　請求項６に記載の車輌用灯具。     The light guide distance of the second light guide body is made longer than the light guide distance of the first light guide body.
    The vehicle lamp according to claim 6, wherein the light emitting center of the light source is located on the side of the second incident surface from the center of the first incident surface and the second incident surface.
  8. 　前記第２の出射面の面積が前記第１の出射面の面積より大きくされ、
    　前記光源の発光中心が前記第１の入射面と前記第２の入射面の中央より前記第２の入射面側に位置された
    　請求項６に記載の車輌用灯具。     The area of the second exit surface is made larger than the area of the first exit surface.
    The vehicle lamp according to claim 6, wherein the light emitting center of the light source is located on the side of the second incident surface from the center of the first incident surface and the second incident surface.
  9. 　前記第１の導光体又は前記第２の導光体の一方に位置決め突部が設けられ、
    　前記位置決め突部が前記第１の導光体又は前記第２の導光体の他方に押し当てられた状態で前記第１の導光体と前記第２の導光体の位置決めが行われる
    　請求項６、請求項７又は請求項８に記載の車輌用灯具。     A positioning protrusion is provided on one of the first light guide body and the second light guide body.
    A claim in which the first light guide body and the second light guide body are positioned in a state where the positioning protrusion is pressed against the other of the first light guide body or the second light guide body. Item 6. The vehicle lighting device according to claim 7 or 8.
  10. 　前記第１の導光体と前記第２の導光体が保持されるインナーハウジングが設けられ、
    　前記インナーハウジングに前記第１の導光体又は前記第２の導光体の一方をネジ止めにより取り付けるための取付ボスと前記第１の導光体又は前記第２の導光体の他方を支持する受け支持部とが設けられ、
    　前記第１の導光体又は前記第２の導光体の一方が前記取付ボスにネジ止めされた状態において前記第１の導光体又は前記第２の導光体の他方が前記第１の導光体又は前記第２の導光体の一方に一方向へ押さえられ前記受け支持部に前記一方向と反対の他方向から受けられる
    　請求項９に記載の車輌用灯具。     An inner housing for holding the first light guide body and the second light guide body is provided.
    A mounting boss for attaching one of the first light guide body or the second light guide body to the inner housing by screwing and the other of the first light guide body or the second light guide body are supported. A receiving support part is provided,
    In a state where one of the first light guide body or the second light guide body is screwed to the mounting boss, the other of the first light guide body or the second light guide body is the first light guide body. The vehicle lamp according to claim 9, wherein the light fixture is pressed in one direction by one of the light guide body or the second light guide body and is received by the receiving support portion from the other direction opposite to the one direction.
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