JP2015115276A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a bright light distribution pattern by an inexpensive and compact lighting fixture structure, in a projector type vehicular lighting fixture in which a light emitting element is a light source.SOLUTION: A vehicular lighting fixture is configured in such a manner that first and second light emitting elements 14, 24 and first and second reflectors 16, 26 are arranged at the back side of a projection lens 12, and a light distribution pattern for a low beam is formed by simultaneous lighting of both light emitting elements 14, 24. Thereby, a bright light distribution pattern can be formed with an inexpensive lighting fixture structure. At that time, with respect to the first light emitting element 14 arranged upward, the first reflector 16 is arranged so as to cover it from an upper side, and also, with respect to the second light emitting element 24 arranged upward, the second reflector 26 is arranged so as to cover it from the upper side, and then, the second light emitting element 24 is arranged in a position which is hidden at the back side of the first reflector 16 in a front view of the lighting fixture. Thereby, the lighting fixture structure becomes compact.

Description

  The present invention relates to a projector-type vehicular lamp using a light emitting element as a light source.

  In general, a projector-type vehicular lamp is configured to reflect light from a light source disposed behind a rear focus of a projection lens toward the projection lens by a reflector.

  “Patent Document 1” describes a projector-type vehicular lamp using a light-emitting element as a light source, in which two sets of light-emitting elements and reflectors are arranged on the rear side of the projection lens.

JP 2006-164735 A

  In a projector-type vehicular lamp that uses a single light-emitting element as a light source, when a bright light distribution pattern is to be formed, it is necessary to use a high-power light-emitting element, which results in an expensive lamp configuration. End up.

  In that regard, as described in the above-mentioned “Patent Document 1”, if two sets of light emitting elements and reflectors are arranged on the rear side of the projection lens, a bright light distribution pattern can be formed with an inexpensive lamp configuration. It becomes possible to do.

  However, in the vehicular lamp described in the above-mentioned “Patent Document 1”, since the two sets of light emitting elements and reflectors are arranged at positions separated from each other in the vertical direction, the lamp configuration may be made compact. There is a problem that it is not possible.

  The present invention has been made in view of such circumstances, and in a projector-type vehicular lamp using a light emitting element as a light source, a bright light distribution pattern can be formed with an inexpensive and compact lamp configuration. The object is to provide a vehicular lamp.

  The present invention is configured to have two sets of light emitting elements and reflectors, and to achieve the above object by devising the arrangement.

That is, the vehicular lamp according to the present invention is
A projection lens, first and second light emitting elements disposed behind the rear focal point of the projection lens, a first reflector for reflecting light from the first light emitting element toward the projection lens, And a second reflector that reflects light from the second light emitting element toward the projection lens, and configured to form a required light distribution pattern by simultaneously lighting the first and second light emitting elements. In the lighting equipment,
The first light emitting element is arranged in a required direction intersecting the optical axis of the projection lens, and the first reflector is arranged so as to cover the first light emitting element from the required direction side. And
The second light emitting element is arranged in the required direction at a position hidden behind the first reflector in the front view of the lamp, and the second reflector moves the second light emitting element from the required direction side. It is arranged so as to cover.

  The type of the “light emitting element” is not particularly limited, and for example, a light emitting diode, a laser diode, or the like can be employed.

  The type of the “required light distribution pattern” is not particularly limited. For example, a low beam light distribution pattern, a high beam light distribution pattern, or the like can be employed.

  The “required direction” is not particularly limited as long as it is a direction that intersects the optical axis of the projection lens.

  The “first light-emitting element” and the “second light-emitting element” are both arranged in the required direction, but it is not always necessary that the directions of the light-emitting elements are exactly the same. .

  The specific position of the “second light emitting element” is not particularly limited as long as it is disposed at a position hidden behind the first reflector in the front view of the lamp.

  As long as the “first reflector” is arranged so as to cover the first light emitting element from the required direction side, the specific reflecting surface shape and arrangement are not particularly limited.

  As long as the “second reflector” is arranged so as to cover the second light emitting element from the required direction side, the specific reflecting surface shape and arrangement are not particularly limited.

  As shown in the above configuration, the vehicular lamp according to the present invention is configured as a projector-type vehicular lamp in which two sets of light emitting elements and reflectors are arranged on the rear side of the projection lens. Since a required light distribution pattern is formed by lighting, a bright light distribution pattern can be formed with an inexpensive lamp configuration.

  In that case, the vehicular lamp according to the present invention has a first reflector that covers the first light emitting element arranged in a required direction intersecting the optical axis of the projection lens from the required direction side. In addition to the second light emitting element arranged in the required direction, the second reflector is arranged so as to cover the second light emitting element from the required direction side. Since it is arrange | positioned in the position hidden behind the 1st reflector in lamp front view, a lamp structure can be made compact.

  As described above, according to the present invention, in a projector-type vehicular lamp using a light emitting element as a light source, a bright light distribution pattern can be formed with an inexpensive and compact lamp configuration.

  In the above configuration, if the required direction is set to the upward direction and the second light emitting element is disposed above the first light emitting element, a low beam light distribution pattern and the like can be easily formed. Can do.

  In the above configuration, if the reflecting surface of the second reflector has a larger lateral width than the reflecting surface of the first reflector, much of the reflected light from the second reflector is projected without being blocked by the first reflector. Can reach the lens.

  In the above configuration, the center region of the light distribution pattern is formed by the light from the first light emitting element reflected by the first reflector, and the left side of the center region and / or by the light from the second light emitting element reflected by the second reflector. If the configuration is such that the diffusion region located on the right side is formed, a horizontally long light distribution pattern is reasonably formed by reflected light from both reflectors even though the first and second reflectors partially overlap. be able to.

  In the above configuration, if the first reflector and the second reflector are arranged so as to partially overlap in the front view of the lamp, the lamp configuration can be made more compact.

The front view which shows the vehicle lamp which concerns on one Embodiment of this invention II-II sectional view of FIG. The top view which shows the said vehicle lamp (A) is a perspective view showing a low-beam light distribution pattern formed on a virtual vertical screen arranged at a position 25 m ahead of the lamp by light emitted forward from the vehicle lamp, (b), ( c) is a diagram showing two light distribution patterns constituting the low-beam light distribution pattern. The same figure as FIG. 2 which shows the modification of the said embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a vehicular lamp 10 according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a plan view showing the vehicular lamp 10. As shown in FIG.

  As shown in these drawings, the vehicular lamp 10 according to the present embodiment includes a projection lens 12, first and second light emitting elements 14 disposed on the rear side of the rear focal point F of the projection lens 12, 24, a first reflector 16 that reflects light from the first light emitting element 14 toward the projection lens 12, a second reflector 26 that reflects light from the second light emitting element 24 toward the projection lens 12, and the like. The configuration includes a mirror member 20 disposed between the first and second reflectors 16 and 26 and the projection lens 12.

  This vehicular lamp 10 is a low beam lamp unit used in a state where it is incorporated as a part of a headlamp. In the state where it is incorporated in a headlamp, the optical axis Ax of the projection lens 12 is in the vehicle longitudinal direction. It is arranged in a state extending in the downward direction by about 0.5 to 0.6 °. The vehicular lamp 10 is configured to form a low beam light distribution pattern by simultaneously lighting the first and second light emitting elements 14 and 24.

  The projection lens 12 is a plano-convex aspheric lens having a convex front surface and a flat rear surface, and is supported by a base member 34 via a lens holder 32.

  Each of the first and second light emitting elements 14 and 24 is a white light emitting diode and has a light emitting surface 14a having a horizontally long rectangular shape.

  The first light emitting element 14 is supported by the base member 34 in a state where the light emitting surface 14a is arranged upward on the optical axis Ax.

  The 1st reflector 16 is arrange | positioned so that the 1st light emitting element 14 may be covered from the upper side, and is supported by the base member 34 in the lower end surface.

  The reflecting surface 16a of the first reflector 16 is a curved surface that approximates an elliptical surface with the light emission center of the first light emitting element 14 as the first focal point, and the eccentricity of the elliptical surface changes from a vertical cross section to a horizontal cross section. It is set so that it gradually becomes larger. The first reflector 16 is also subjected to a reflective surface treatment on the rear surface 16b.

  The second light emitting element 24 is supported by the base member 34 in a state of being disposed upward on the upper side of the first light emitting element 14. At this time, the second light emitting element 24 is disposed at a position hidden behind the first reflector 16 in the front view of the lamp.

  The 2nd reflector 26 is arrange | positioned so that the 2nd light emitting element 24 may be covered from upper side, and is supported by the base member 34 in the lower end surface.

  The reflection surface 26a of the second reflector 26 is configured by a curved surface that approximates an elliptical surface having the light emission center of the second light emitting element 24 as a first focal point, and the eccentricity of the elliptical surface changes from a vertical cross section to a horizontal cross section. It is set so that it gradually becomes larger.

  The reflection surface 26 a of the second reflector 26 has a left-right width and a vertical width larger than the reflection surface 16 a of the first reflector 16. Further, the front end edge of the reflection surface 26 a of the second reflector 26 is located on the front side of the front end edge of the reflection surface 16 a of the first reflector 16. And this 2nd reflector 26 is arrange | positioned so that it may overlap with the 1st reflector 16 partially in lamp front view.

  A part of the light from the second light emitting element 24 reflected by the second reflector 26 reaches the first reflector 16, but the rear surface 16b of the first reflector 16 is subjected to a reflection surface treatment. After being reflected by the rear surface 16b, most of the light reaches the second reflector 26 again, and is reflected by the reflecting surface 26a to reach the projection lens 12.

  The mirror member 20 has an upward reflecting surface 20 a for reflecting a part of the reflected light from the first and second reflectors 16 and 26 upward so as to enter the projection lens 12. In the upward reflecting surface 20a, the left region located on the left side of the optical axis Ax (right side in the front view of the lamp) is configured by a horizontal plane including the optical axis Ax, and the right region located on the right side of the optical axis Ax It is composed of a horizontal plane that is one step lower than the left region through a short slope. The front edge 20a1 of the upward reflecting surface 20a extends from the rear focal point F toward the left and right sides so as to curve forward along the meridional image plane of the projection lens 12. The light reflected by the upward reflecting surface 20a of the mirror member 20 is emitted from the projection lens 12 as downward light.

  FIG. 4A is a perspective view showing a low beam light distribution pattern PL formed on a virtual vertical screen arranged at a position 25 m ahead of the vehicle by light irradiated forward from the vehicle lamp 10. is there.

  This low beam light distribution pattern PL is a left light distribution pattern for low beam, and has upper and lower cut-off lines CL1 and CL2 at its upper edge. The cut-off lines CL1 and CL2 extend in the horizontal direction at the left and right steps with the VV line passing through the HV, which is a vanishing point in the front direction of the lamp, in the vertical direction, and are on the right side of the VV line. The opposite lane side portion is formed as a lower cut-off line CL1, and the own lane side portion on the left side of the VV line is formed as an upper cut-off line CL2 that rises from the lower cut-off line CL1 through an inclined portion. Is formed.

  This low beam light distribution pattern PL is formed on the rear focal plane of the projection lens 12 by the light from the first and second light emitting elements 14 and 24 reflected by the first and second reflectors 16 and 26. The light source images of the second light emitting elements 14 and 24 are formed by projecting them as inverted projection images on the virtual vertical screen by the projection lens 12, and the cut-off lines CL1 and CL2 are the upward reflecting surfaces 20a of the mirror member 20. Is formed as a reverse projection image of the front edge 20a1.

  In this low beam distribution pattern PL, the elbow point E, which is the intersection of the lower cut-off line CL1 and the VV line, is located about 0.5 to 0.6 ° below HV. This is because the optical axis Ax extends in a downward direction by about 0.5 to 0.6 ° with respect to the vehicle longitudinal direction.

  This low beam light distribution pattern PL is formed by combining two light distribution patterns PA and PB shown in FIGS.

  The light distribution pattern PA shown in FIG. 4B is a light distribution pattern formed by light from the first light emitting element 14 reflected by the first reflector 16.

  The light distribution pattern PA is formed as a bright light distribution pattern having a shape obtained by reducing the low beam light distribution pattern PL around the elbow point E. That is, the light distribution pattern PA forms the central region of the low beam light distribution pattern PL, and forms the main part of the cut-off lines CL1 and CL2.

  A light distribution pattern PB shown in FIG. 4C is a light distribution pattern formed by light from the second light emitting element 24 reflected by the second reflector 26.

  The light distribution pattern PB is formed as a light distribution pattern that partially overlaps the peripheral edge portion so as to surround the light distribution pattern PA. That is, the light distribution pattern PB forms diffusion regions located on the left and right sides of the central region of the low beam light distribution pattern PL, and forms both left and right end portions of the cut-off lines CL1 and CL2. .

  Most of the light distribution pattern PB is formed by the light from the second light emitting element 24 that directly reaches the projection lens 12 after being reflected by the second reflector 26, but a part of the light distribution pattern PB is reflected by the second reflector 26. After that, the light is reflected by the rear surface 16 b of the first reflector 16, is reflected again by the second reflector 26, and is formed by the light from the second light emitting element 24 that has reached the projection lens 12.

  Next, the effect of this embodiment is demonstrated.

  The vehicular lamp 10 according to the present embodiment is configured as a projector-type vehicular lamp in which the first and second light emitting elements 14 and 24 and the first and second reflectors 16 and 26 are disposed on the rear side of the projection lens 12. The light distribution pattern PL for low beam (that is, the required light distribution pattern) is formed by simultaneously lighting both the light emitting elements 14 and 24, so that a bright light distribution pattern is formed with an inexpensive lamp structure. can do.

  At this time, the vehicular lamp 10 according to the present embodiment is arranged with respect to the first light emitting element 14 arranged upward (that is, arranged in a required direction intersecting the optical axis Ax of the projection lens 12). The first reflector 16 is arranged so as to cover the upper side from the upper side (that is, from the required direction side), and the second light emitting element 26 arranged upward is covered with the second reflector 26 from the upper side. Although the reflector 26 is arranged, the second light emitting element 24 is arranged at a position hidden behind the first reflector 16 in the front view of the lamp, so that the lamp configuration can be made compact. it can.

  As described above, according to the present embodiment, in the projector-type vehicular lamp 10 using the first and second light emitting elements 14 and 24 as light sources, a bright low-beam light distribution pattern PL is formed with an inexpensive and compact lamp configuration. can do.

  In the present embodiment, the first and second light-emitting elements 14 and 24 are disposed upward, and the second light-emitting element 24 is disposed above the first light-emitting element 14 at that time. By adopting a configuration in which the mirror member 20 is disposed as in the embodiment, the low beam light distribution pattern PL can be easily formed.

  In the present embodiment, since the reflecting surface 26a of the second reflector 26 has a larger left-right width than the reflecting surface 16a of the first reflector 16, most of the reflected light from the second reflector 26 is used for the first reflector. 16 can reach the projection lens 12 without being shielded from light. As a result, the low beam light distribution pattern PL can be formed as a brighter light distribution pattern.

  At this time, in the present embodiment, the light from the second light emitting element 24 that has been reflected by the second reflector 26 and then has reached the first reflector 16 is also reflected by the rear surface 16b, and most of the light is secondly again. Since the light is reflected by the reflecting surface 26a of the reflector 26 and reaches the projection lens 12, the light distribution pattern for low beam PL can be formed as a brighter light distribution pattern.

  In the present embodiment, the central region of the low beam light distribution pattern PL is formed by the light from the first light emitting element 14 reflected by the first reflector 16, and the light from the second light emitting element 24 reflected by the second reflector 26 is formed. Since the light is configured to form diffusion regions located on the left and right sides of the center region of the low beam light distribution pattern PL, the second light emitting element 24 is hidden behind the first reflector 16 in the front view of the lamp. Regardless of the position, the horizontally long low beam light distribution pattern PL can be formed without difficulty by the reflected light from the reflectors 16 and 26.

  In the present embodiment, since the first reflector 16 and the second reflector 26 are arranged so as to partially overlap in the front view of the lamp, the lamp configuration can be made more compact.

  In the said embodiment, although demonstrated as what was comprised so that the light distribution pattern PL for low beams might be formed by setting it as the structure by which the mirror member 20 is arrange | positioned, instead of the mirror member 20, 1st and 1st It is also possible to employ a configuration in which a shade that blocks part of the reflected light from the two reflectors 16 and 26 is disposed.

  In the above-described embodiment, the low-beam light distribution pattern PL is configured to be formed by the irradiation light from the vehicular lamp 10, but by removing the mirror member 20 in the configuration of the above-described embodiment, It is also possible to configure so as to form a high beam light distribution pattern. At that time, the first and second light emitting elements 14 and 24 and the first and second reflectors 16 and 26 may be vertically inverted.

  Next, a modification of the above embodiment will be described.

  FIG. 5 is a view similar to FIG. 2 showing the vehicular lamp 110 according to this modification.

  As shown in the figure, the basic configuration of the vehicular lamp 110 is the same as that of the vehicular lamp 10 of the above embodiment, but the arrangement of the first light emitting element 114 and the first reflector 116 is the case of the above embodiment. Accordingly, the configurations of the mirror member 120 and the base member 134 are partially different from those in the above embodiment.

  That is, in the present modification, the first light emitting element 114 is supported by the base member 134 with the light emitting surface 114a facing upward on the lower side of the optical axis Ax. However, the configuration of the first light emitting element 114 is the same as that of the first light emitting element 14 of the above embodiment.

  The first reflector 116 is disposed so as to cover the first light emitting element 114 from the upper side, similarly to the first reflector 16 of the above-described embodiment, and reflects light from the first light emitting element 114 by the reflection surface 116a. Thus, the central region of the low beam light distribution pattern PL is formed. At this time, the reflection surface 116a of the first reflector 116 has a surface shape corresponding to the position of the first light emitting element 114 being displaced downward with respect to the first light emitting element 14 of the above embodiment. However, the surface shape of the reflecting surface 16a of the first reflector 16 of the above embodiment is slightly different.

  The rear surface 116b of the first reflector 116 is also subjected to a reflective surface treatment, whereby a part of the light from the second light emitting element 24 reflected by the second reflector 26 is reflected by the rear surface 116b. ing.

  Also in this modification, the 1st reflector 116 and the 2nd reflector 26 are arrange | positioned so that it may overlap partially in lamp | ramp front view.

  The mirror member 120 of this modification also has an upward reflecting surface 120a for reflecting a part of the reflected light from the first and second reflectors 116 and 26 upward so as to enter the projection lens 12. At this time, the upward reflecting surface 120a reflects more light reflected from the first reflector 116, which is displaced downward with respect to the first light emitting element 14 of the above-described embodiment, and therefore the front edge 120a1 thereof. It is formed as an inclined surface inclined downward from the rear to the rear.

  Even in the case of adopting the configuration of the present modification, it is possible to obtain the same operational effects as in the case of the above embodiment.

  In addition, the numerical value shown as a specification in the said embodiment and its modification is only an example, and of course, you may set these to a different value suitably.

  The invention of the present application is not limited to the configuration described in the above-described embodiment and its modifications, and a configuration with various other changes can be adopted.

DESCRIPTION OF SYMBOLS 10,110 Vehicle lamp 12 Projection lens 14,114 1st light emitting element 14a, 114a Light emitting surface 16,116 1st reflector 16a, 26a, 116a Reflecting surface 16b, 116b Rear surface 20,120 Mirror member 20a, 120a Upward reflecting surface 20a1 120a1 Front edge 24 Second light emitting element 26 Second reflector 32 Lens holder 34, 134 Base member Ax Optical axis CL1 Lower cut-off line CL2 Upper cut-off line E Elbow point F Rear focus PA, PB Light distribution pattern PL Low beam light distribution pattern

Claims (5)

A projection lens, first and second light emitting elements disposed behind the rear focal point of the projection lens, a first reflector for reflecting light from the first light emitting element toward the projection lens, And a second reflector that reflects light from the second light emitting element toward the projection lens, and configured to form a required light distribution pattern by simultaneously lighting the first and second light emitting elements. In the lighting equipment,
The first light emitting element is arranged in a required direction intersecting the optical axis of the projection lens, and the first reflector is arranged so as to cover the first light emitting element from the required direction side. And
The second light emitting element is arranged in the required direction at a position hidden behind the first reflector in the front view of the lamp, and the second reflector moves the second light emitting element from the required direction side. A vehicular lamp characterized by being arranged to cover. The above required direction is set upward,
The vehicular lamp according to claim 1, wherein the second light emitting element is disposed above the first light emitting element.   3. The vehicular lamp according to claim 1, wherein the reflection surface of the second reflector has a lateral width greater than that of the reflection surface of the first reflector. 4.   A central region of the light distribution pattern is formed by the light from the first light emitting element reflected by the first reflector, and the light distribution pattern is formed by the light from the second light emitting element reflected by the second reflector. 4. The vehicular lamp according to claim 1, wherein the vehicular lamp is configured to form a diffusion region located on the left side and / or the right side of the central region.   The vehicular lamp according to any one of claims 1 to 4, wherein the first reflector and the second reflector are arranged so as to partially overlap in a front view of the lamp.

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