JP2019197714A - Vehicular lighting tool - Google Patents

Abstract

To provide a vehicular lighting tool for suppressing the occurrence of light distribution unevenness in a high-beam light distribution pattern when using a shade to form a cut-off line of a low-beam light distribution pattern, for reflecting light for high-beam light distribution.SOLUTION: The vehicular lighting tool includes a first light source L for low-beam light distribution, a shade 40 arranged on the front side of the first light source L and having a first face to form a cut-off line, and a second light source H for high-beam light distribution arranged so that a plurality of light-emitting parts (second light-emitting chips H2) are located on the second face side on the opposite side of the first face, the shade 40 including an oblique cut-off formation part, an inside region on the oblique cut-off formation part side where the second face is a light condensation reflection face, and an outside region apart from the oblique cut-off formation part where the second face is a diffusion reflection face.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicular lamp.

  In Patent Document 1, a plurality of light emitting elements arranged in the horizontal direction for a high beam light distribution pattern are used to form a cut-off line of a low beam light distribution pattern using one upper plate upper part (hereinafter also referred to as a shade). There is disclosed a vehicular lamp that uses light from the vehicle as a reflection surface that reflects the light forward (see Patent Document 1).

  Specifically, a plurality of light emitting elements arranged horizontally in the lower side of the shade are arranged, and the lower surface of the shade is formed so as to extend slightly downward from the tip to the upper position of the plurality of light emitting elements, It is described that the mirror surface is a reflective surface that reflects light from a plurality of light emitting elements forward by aluminum deposition.

International Publication No. 2017/104678

  By the way, when the lower surface of the shade is used as a reflection surface that reflects light from a plurality of light emitting elements arranged in the horizontal direction for the high beam light distribution pattern as described above, there is a risk of uneven light distribution in the high beam light distribution pattern. is there.

  The present invention has been made in view of such circumstances, and when the shade forming the cut-off line of the low beam light distribution pattern is used to reflect the light for high beam light distribution, the high beam light distribution pattern is obtained. An object of the present invention is to provide a vehicular lamp that suppresses the occurrence of uneven light distribution.

The present invention is grasped by the following composition in order to achieve the above-mentioned object.
(1) A vehicular lamp according to the present invention includes a first light source for low beam distribution, a shade having a first surface that is disposed in front of the first light source and forms a cut-off line, and A second light source for high beam light distribution arranged so that a plurality of light emitting portions are positioned on the second surface side opposite to the second surface, wherein the shade collects the oblique cut-off forming portion and the second surface. An inner region on the side of the oblique cut-off forming portion as a light reflecting surface, and an outer region away from the oblique cut-off forming portion with the second surface as a diffuse reflecting surface.

(2) In the configuration of the above (1), the inner region is the second surface of the outer region when the average curvature of the second surface viewed in a cross-section along the front-rear direction is viewed in a cross-section along the front-rear direction. Less than the average curvature of.

(3) In the configuration of (2), the inner region located on the left side of the oblique cut-off forming portion and the inner region located on the right side of the oblique cut-off forming portion are the average curvature of the second surface. And the oblique cut-off forming portion gradually changes from the average curvature of the second surface of the inner region on the left side to the average curvature of the second surface of the inner region on the right side from the left side to the right side. The second surface is a gradually changing curved surface.

(4) In the configuration of (2) or (3), the shade includes a connection region provided between the inner region and the outer region, and the connection region extends from the inner region to the outer region. The second surface is a gradually changing curved surface that gradually changes from the average curvature of the second surface of the inner region to the average curvature of the second surface of the outer region.

(5) In any one configuration of the above (1) to (4), the inner region and the outer region are formed in a cylindrical curved surface that curves toward the first surface along the front-rear direction. It has a second surface.

(6) In any one of the configurations (1) to (5), the shade is connected to the front side of the outer region, and the width in the front-rear direction increases in a direction away from the inner region in the left-right direction. The front additional region has a reflection suppressing surface in which the second surface suppresses reflection of light from the second light source.

(7) In the configuration of (6), the reflection suppression surface is a surface that is left as a material of the material that forms the shade, or a surface that is coated with a light-absorbing color.

  According to the present invention, when the shade forming the cut-off line of the low beam distribution pattern is used to reflect the light for high beam distribution, the vehicle in which uneven distribution of light is prevented from occurring in the high beam distribution pattern. A lighting fixture can be provided.

It is a top view of vehicles provided with a vehicular lamp of an embodiment concerning the present invention. It is a side view of the lamp unit of the embodiment according to the present invention. It is sectional drawing of the lamp unit of embodiment which concerns on this invention. It is a partially exploded perspective view of the lamp unit of the embodiment according to the present invention. It is a disassembled perspective view of the part except the lens and lens holder of the lamp unit of embodiment which concerns on this invention. It is the perspective view which showed only the shade of embodiment which concerns on this invention. It is a figure for demonstrating the effect at the time of making the 2nd surface of the front addition area | region of embodiment which concerns on this invention into a reflection suppression surface. It is a figure for demonstrating mainly the 2nd surface of the diagonal cut-off formation part, inner side area | region, outer side area | region, and connection area | region of the light-shielding part of embodiment which concerns on this invention. It is a figure for demonstrating the suppression effect of the light distribution nonuniformity by the 2nd surface of the diagonal cut-off formation part, inner side area | region, outer side area | region, and connection area | region of the light-shielding part of embodiment which concerns on this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, a mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described in detail with reference to the accompanying drawings.
In addition, the same number or code | symbol is attached | subjected to the same element through the whole description of embodiment.

Further, in the embodiment and the drawings, unless otherwise specified, “front” and “rear” indicate “forward direction” and “reverse direction” of the vehicle 102, respectively, and “up”, “down”, “ “Left” and “Right” respectively indicate directions viewed from the driver who gets on the vehicle 102.
Needless to say, “upper” and “lower” are also “upper” and “lower” in the vertical direction, and “left” and “right” are also “left” and “right” in the horizontal direction.

FIG. 1 is a plan view of a vehicle 102 including a vehicle lamp according to an embodiment of the present invention.
As shown in FIG. 1, the vehicular lamp according to the embodiment of the present invention is a vehicular headlamp (101L, 101R) provided on each of the left and right front sides of a vehicle 102. Hereinafter, the vehicular lamp is simply a vehicular lamp. It describes.

  The vehicular lamp according to the present embodiment includes a housing (not shown) that opens to the front side of the vehicle and an outer lens (not shown) that is attached to the housing so as to cover the opening, and is formed by the housing and the outer lens. A lamp unit 1 (see FIG. 2) and the like are disposed in the lamp chamber.

2 is a side view of the lamp unit 1, and FIG. 3 is a cross-sectional view of the lamp unit 1 along the lamp unit optical axis (hereinafter also referred to as the lamp optical axis Z) shown in FIG.
FIG. 4 is a partially exploded perspective view of the lamp unit 1, and FIG. 5 is an exploded perspective view of a portion of the lamp unit 1 excluding the lens 70 and the lens holder 60.

  As shown in FIGS. 3 and 5, the lamp unit 1 mainly includes a heat sink 10, a cooling fan 20, a first light source L, a reflector 30, a shade 40, a second light source H, and a lens holder 60. And a lens 70.

(Heat sink 10)
The heat sink 10 is formed of a metal or a resin having a high thermal conductivity in order to efficiently dissipate the heat generated by the first light source L and the second light source H. Is a heat sink 10 made of die-cast aluminum.
However, it is not necessary to be limited to the integrally molded heat sink 10 as in the present embodiment, and the heat sink 10 may be a part of the heat sink 10 that is partially manufactured and assembled.

  The heat sink 10 is located on the front side of the first base part 12 where the first light source L is disposed and on the lower side of the first base part 12 and is inclined obliquely downward on the front side. And a second base portion 13 on which the second light source H is disposed.

As shown in FIG. 5, the first base portion 12 includes a first light source arrangement portion 12 </ b> A that is integrally formed on the upper surface and in which the first light source L is arranged.
And the 1st light source L arrange | positioned at 12 A of 1st light source arrangement | positioning parts is fixed with respect to 12 A of 1st light source arrangement | positioning by the light source holder 80 fixed to the 1st base part 12 with a pair of screw 12N1.

On the other hand, the second base portion 13 is a second light source arrangement portion 13A in which the front surface facing the front side receives the second light source H and arranges the second light source H.
In the second light source arrangement portion 13A, a pair of left and right positioning pins 13AA are formed so as to protrude forward, and a pair of left and right screw fixing holes 13AB are formed slightly above the positioning pins 13AA. Has been.

  As will be described later, each of the second light source H and the shade 40 includes a pair of positioning pin insertion holes (positioning pin insertion hole H11, positioning pin insertion hole 42A) corresponding to the positioning pin 13AA, and a screw fixing hole 13AB. 4 and a pair of screw insertion holes (screw insertion hole H12, screw insertion hole 42B). As shown in FIG. 4, the second light source H and the shade 40 are screwed with the screw 13N1 to the second base. The part 13 is fastened together.

Further, as shown in FIG. 3, the heat sink 10 includes a plurality of heat radiation fins 11 </ b> F integrally provided on the base portion 11 below the base portion 11.
Specifically, the heat radiating fins 11 </ b> F extend downward from the first base portion 12, and are provided integrally with the first base portion 12. The plurality of first heat radiating fins 12 </ b> F arranged in the front-rear direction and the second base A plurality of second radiating fins 13 </ b> F extending from the portion 13 to the rear side and arranged integrally with the second base portion 13 are provided.

  The first radiating fins 12F are thin plate-like, and are formed so that the thin plate-like surfaces thereof face in the front-rear direction. The wind sent from the cooling fan 20 between the first radiating fins 12F is horizontal. It is designed to flow in the direction.

In recent years, the inner wall surface on the rear side in the lamp chamber in which the lamp unit 1 is disposed tends to be located near the rear of the lamp unit 1 in order to reduce the size of the vehicular lamp.
In this case, when the wind flow is directed to the rear side, the wind flow is deteriorated due to the influence of the inner wall surface on the rear side in the lamp chamber located near the rear of the lamp unit 1, and the cooling efficiency may be reduced. However, if the wind is allowed to flow in the horizontal direction as in this embodiment, such a decrease in cooling efficiency can be avoided.

On the other hand, the second radiating fin 13F has a thin plate shape and is formed so that the thin plate-like surface faces in the left-right direction (horizontal direction), and the wind sent from the cooling fan 20 is applied to the second base portion 13. Along the top.
And in order not to inhibit this flow of wind, between the 1st base part 12 and the 2nd base part 13, the opening part 11A opened horizontally and vertically is formed in the horizontal direction.

  For this reason, as shown in FIG. 5, avoiding a decrease in cooling efficiency due to the influence of the pair of lens holder mounting portions 14 to which the lens holder 60 provided on the left and right outer sides of the second base portion 13 is mounted. Can do.

  In addition, the wind takes heat while flowing along the second base portion 13 and the temperature rises. Therefore, by making the air flow upward rather than in the left-right direction, the flow is further improved, so that the cooling efficiency is improved. It is possible to increase.

  Furthermore, since the wind flows into the reflector 30 through the opening 11A and contributes to cooling of the space between the first base portion 12 and the reflector 30, the cooling efficiency of the first light source L can be further enhanced. it can.

As mentioned earlier, the heat sink 10 includes a pair of lens holder mounting portions 14 (see FIG. 5) provided on the left and right outer sides of the second base portion 13.
The lens holder mounting portion 14 includes a positioning pin 14A (see FIG. 4) and a pair of screw fixing holes 14B (see FIG. 4) provided above and below the positioning pin 14A.

  As will be described later, the lens holder 60 corresponds to the positioning pin insertion holes (positioning pin insertion holes 61BA, positioning pin insertion holes 62BA) corresponding to the positioning pins 14A and the screw fixing holes 14B, as shown in FIG. Screw insertion holes (screw insertion hole 61BB, screw insertion hole 62BB) to be fixed to the lens holder mounting portion 14 with screws 14N1, as shown in FIG.

  As shown in FIG. 2, the heat sink 10 has a cooling fan mounting leg 15 in which a screw fixing hole that opens downward is formed. The cooling fan 20 is attached to the cooling fan mounting leg 15 with screws 15N1. Is attached.

(Cooling fan 20)
As shown in FIG. 3, the cooling fan 20 is disposed below the heat dissipating fins 11 </ b> F of the heat sink 10, and is fixed to the cooling fan mounting leg 15 of the heat sink 10 with the screws 15 </ b> N <b> 1 as described above. .

  And by driving the cooling fan 20, wind is sent between the plurality of heat radiation fins 11F, the cooling efficiency by the heat sink 10 is enhanced, and the first light source L and the second light source H can be efficiently cooled. it can.

(First light source L)
The first light source L is a low beam light source that emits light for low beam distribution, and includes a substrate L1 and a first light emitting chip L2 provided on the substrate L1.
Note that the number of the first light emitting chips L2 is not necessarily limited to one, and a plurality of first light emitting chips L2 (for example, four chips) may be provided on the substrate L1.

  And the 1st light source L is arrange | positioned on the 1st base part 12 so that light may radiate | emit upwards, and the emitted light is the lens 70 side by the reflective surface 31 of the reflector 30 which faces the 1st light source L side. Is reflected.

  In the present embodiment, the first light source L is an LED light source in which the first light emitting chip L2 is an LED chip, but the laser light source in which the first light emitting chip L2 is an LD chip (laser diode chip). As the first light source L, a semiconductor light source is preferably used.

(Reflector 30)
As shown in FIG. 5, the reflector 30 is provided on a reflecting portion 30 </ b> A having a reflecting surface 31 (see FIG. 3) that reflects light from the first light source L toward the lens 70, and on the outer periphery of the lower end of the reflecting portion 30 </ b> A. And a flange portion 30B.

  On the first base portion 12, a pair of left and right positioning pins 12B for positioning the reflector 30 and a pair of left and right screw fixing holes 12C for fixing the pair of screws 12N2 for fixing the reflector 30 with screws are provided. The reflector 30 includes a pair of left and right pin insertion holes 30BA corresponding to the positioning pins 12B, and a pair of left and right screw insertion holes 30BB corresponding to the screw fixing holes 12C.

  Therefore, after the reflector 30 is positioned on the first base portion 12 so as to be positioned by the positioning pin 12B, the screw 12N2 is screwed into the screw fixing hole 12C so that the reflector 30 is attached to the first base portion 12. Can be fixed.

  As shown in FIG. 3, the reflector 30 fixed in this manner is in a state in which the front side is opened and the first light source L is covered in a semi-dome shape, and the light from the first light source L is front side. The lens 70 is irradiated through the opening.

  In the present embodiment, the reflector 30 is formed in an elliptical shape in which the reflecting surface 31 has two focal points, and the reflector 30 is the first focal point of the reflecting surface 31 that is the focal point on the rear side (the rear side of the reflector 30). Side first focal point) substantially coincides with the light emission center of the first light emitting chip L2 of the first light source L, and the second focal point BP of the reflecting surface 31 serving as the focal point on the front side (on the front side of the reflector 30). The first base portion so that the second focal point BP is also located below the shade 40 (more precisely, below the light-shielding portion 41) within the range overlapping the shade 40 when viewed in the front-rear direction. 12 is arranged.

(Shade 40)
The shade 40 is disposed on the front side of the first light source L, and shields a part of the light from the first light source L reflected by the reflector 30 toward the lens 70 toward the lower side of the lens 70, This is a member for forming the cut-off line of the low beam light distribution pattern. In this embodiment, the shade 40 is made of aluminum die casting.
As will be described later, the shade 40 of the present embodiment also plays a role of reflecting a part of the light from the second light source H to the lens 70 side.

For this reason, as shown in FIG. 5, the shade 40 has a shape that matches the cut-off line shape of the low beam light distribution pattern, and is located above the second light emitting chip H2 of the second light source H described later. The light-shielding part 41 which forms offline is provided.
As will be described later, the light shielding portion 41 serves to reflect a part of the light from the second light source H to the lens 70 side.

The shade 40 is provided integrally with each of the left and right end portions (that is, both end portions) of the light shielding portion 41, and a pair of arms for fixing to the heat sink 10 (more specifically, the second base portion 13). A portion 42 is provided.
However, since the light shielding part 41 can be directly formed on the heat sink 10, in this case, the arm part 42 is omitted, and the shade 40 includes only the light shielding part 41.

  Each of the pair of left and right arm portions 42 includes a positioning pin insertion hole 42A corresponding to the positioning pin 13AA of the second light source arrangement portion 13A of the second base portion 13, and a second light source arrangement portion of the second base portion 13. A screw insertion hole 42B corresponding to the screw fixing hole 13AB of 13A is formed and can be fixed to the second base portion 13 with the screw 13N1 as described above.

(Second light source H)
The second light source H is a light source for high beam light distribution, and includes a substrate H1 and a plurality of second light emitting chips H2 provided on the substrate H1 and arranged in the horizontal direction, as shown in FIG. .

  When a high beam light distribution pattern is used, a high beam additional light distribution formed by light from the second light source H is added to the upper side of the low beam light distribution pattern, thereby forming a high beam light distribution pattern.

  Therefore, a high beam light distribution pattern (more specifically, a state of high beam additional light distribution) so as to suppress glare with respect to the oncoming vehicle or the preceding vehicle by turning off or turning on part or all of the second light emitting chip H2. Variable high beam (Adaptive Driving Beam) control can be performed.

  In the present embodiment, the second light source H is also an LED light source using an LED chip as the second light-emitting chip H2 like the first light source L.

  However, as described in the first light source L, the second light emitting chip H2 may be a laser light source or the like in which an LD chip (laser diode chip) is used. The second light source H includes a semiconductor light source. Preferably used.

  The substrate H1 includes a pair of left and right positioning pin insertion holes H11 corresponding to the positioning pins 13AA of the second light source arrangement portion 13A of the second base portion 13, and screws of the second light source arrangement portion 13A of the second base portion 13. A pair of left and right screw insertion holes H12 corresponding to the fixing hole 13AB is formed, and can be fixed to the second base portion 13 with the screw 13N1 as described above.

(Lens holder 60)
As shown in FIGS. 3 and 4, the lens holder 60 includes a first holder 61 that receives the rear side of a lens 70 (more specifically, flange portion 72), which will be described later, and a lens 70 (more specifically, flange portion 72). And a second holder 62 that presses the lens 70 (more specifically, the flange portion 72) toward the first holder 61 from the front side.

  When the first holder 61 is attached to the heat sink 10, the peripheral portion of the opening corresponding to the incident surface 71 </ b> A on which the light of the lens 70 enters is a receiving portion 61 </ b> AA that receives the rear side of the flange portion 72 of the lens 70. The first holder body 61A formed so that the lens 70 is located at a predetermined position on the front side, and a pair of lens holder mounting portions of the heat sink 10 provided integrally with the rear side of the first holder body 61A. 14 and a pair of left and right first mounting portions 61B for fixing to 14.

  The receiving portion 61AA is provided with a pair of left and right positioning protrusions 61AB that engage with the pair of left and right positioning recesses 72A of the lens 70.

  On the other hand, the second holder 62 has a pressing portion 62AA in which the peripheral portion of the opening corresponding to the emission surface 71B from which the light of the lens 70 is emitted presses the flange portion 72 of the lens 70 toward the receiving portion 61AA side of the first holder 61. A second holder main body portion 62A that is externally mounted on the first holder main body portion 61A of the first holder 61, and a pair of left and right second mounting portions 62B for fixing the heat sink 10 to the pair of lens holder mounting portions 14. It is equipped with.

  The first mounting portion 61B of the pair of left and right first holders 61 and the second mounting portion 62B of the pair of left and right second holders 62 correspond to the positioning pins 14A of the lens holder mounting portion 14 of the heat sink 10. Positioning pin insertion holes (positioning pin insertion holes 61BA, positioning pin insertion holes 62BA) and a pair of heat sinks 10 provided above and below across the positioning pin insertion holes (positioning pin insertion holes 61BA, positioning pin insertion holes 62BA). Screw insertion holes (screw insertion holes 61BB, screw insertion holes 62BB) corresponding to the screw fixing holes 14B of the lens holder mounting portion 14 are provided.

  Therefore, the lens holder 60 is attached to the lens holder attaching portion 14 of the heat sink 10 with the screws 14N1 so that the flange portion 72 of the lens 70 is held between the first holder 61 and the second holder 62. Yes.

(Lens 70)
As shown in FIGS. 3 and 4, the lens 70 is provided integrally with the lens portion 71 that performs light distribution control and the outer peripheral portion of the lens portion 71. As described above, the lens holder 60 (first holder) is provided. 61, and a flange portion 72 sandwiched by a pressing portion 62AA) of the second holder 62.

  The flange portion 72 is provided with a pair of left and right positioning recesses 72 </ b> A that receive a pair of left and right positioning projections 61 </ b> AB provided on the receiving portion 61 </ b> AA of the first holder 61.

  Then, the light from the first light source L and the second light source H is incident on the lens 70 from the incident surface 71A where the light is incident, and the incident light is irradiated forward from the emission surface 71B from which the light is emitted. Will be.

  Here, as shown in FIG. 3, the second light source arrangement portion 13 </ b> A of the second base portion 13 is directed to the front oblique upper side, and the second light source H is thereby directed to the front oblique upper side. It has become.

  And by making this inclination to the front diagonal upper side appropriate, the high beam additional light distribution formed by the light from the second light source H (second light emitting chip H2) is the first light source L (first light emission). The light from the chip L2) is hardly separated from the low beam light distribution pattern formed.

  In addition, the lens 70 mainly corrects the light from the first light source L by slightly correcting the entire curvature of the exit surface 71B below the lens optical axis O of the lens 70 (more specifically, the lens unit 71). Is formed so that the low beam light distribution pattern is positioned slightly above (for example, about a few degrees of commas), so that the low beam light distribution pattern and the high beam additional light distribution are not further separated. It has become.

  As shown in FIG. 3, the lens 70 has a rear focal point P of the lens 70 (more specifically, the lens unit 71) located approximately 0.7 mm ahead of the second focal point BP of the reflector 30. With the focal point P as the rotation axis, the lens optical axis O is arranged so as to be inclined about 0.4 degrees forward and downward with respect to the lamp optical axis Z so that the cut-off line is positioned at an appropriate position. Has been.

  Next, a configuration for suppressing uneven light distribution of the high beam light distribution pattern (more specifically, high beam additional light distribution) will be described while explaining the shade 40 in more detail.

FIG. 6 is a perspective view showing only the shade 40.
As shown in FIG. 6, the shade part 41 of the shade 40 includes an oblique cut-off forming part 41A that forms an oblique cut-off line of the low beam light distribution pattern, and an inner region 41B (oblique cut-off forming) on the oblique cut-off forming part 41A side. The portion 41A includes an inner region 41BA located on the left side (right side in FIG. 6) and an inner region 41BB located on the right side (left side in FIG. 6) of the oblique cut-off forming portion 41A.

  Further, the light shielding portion 41 of the shade 40 includes an outer region 41C (an outer region 41CA located on the left side (right side in FIG. 6) of the oblique cut-off forming portion 41A) and the oblique cut-off forming portion 41A. An outer region 42CB located on the right side (left side in FIG. 6), and a connection region 41D provided between the inner region 41B and the outer region 41C (a connection region located on the left side (right side in FIG. 6) of the oblique cut-off forming portion 41A) 41DA, a connection region 41DB located on the right side (left side in FIG. 6) of the oblique cut-off forming portion 41A.

Further, the light-shielding portion 41 of the shade 40 is connected to the front side of the outer region 41C, and the front additional region 41E (front addition connected to the outer region 41CA) increases in the front-rear direction in the direction away from the inner region 41BB in the left-right direction. An area 41EA and a front additional area 41EB connected to the outer area 41CB.
In addition, this front addition area | region 41E is an area | region provided in order to suppress that a cut-off line warps up toward the left-right outer side.

  Then, the first surface of the shade 40 facing the upper side of the light shielding portion 41 is reflected by the reflector 30 (see FIG. 3), and a part of the light traveling toward the lower side of the lens 70 (see FIG. 3) is shielded to cut off the cutoff line. And the light to be shielded is reflected so as to be incident on the upper side of the lens 70.

For this reason, the 1st surface of the light-shielding part 41 of the shade 40 is colored in silver or white by performing vapor deposition, coating, or the like, for example, and has a high reflectance.
In addition, not only coloring but mirror finish may be given, for example.

  On the other hand, the second surface (lower surface) opposite to the first surface of the light shielding portion 41 of the shade 40 is a light emitting portion of the second light source H (see FIG. 3) arranged so as to be positioned on the second surface side. The second light emitting chip H2 (see FIG. 3) serves as a reflective surface that reflects part of the light toward the lens 70. The second surface of the front additional region 41E is the second surface. It is a reflection suppressing surface that suppresses reflection of light from the light source H.

  Specifically, the second surface of the front additional region 41E is a surface that is left as a material of the material forming the shade 40, so that a reflection suppressing surface that diffuses and reflects light or a light-absorbing color coating is applied. It is set as the reflection suppression surface by being made the surface given.

Note that the second surfaces of the oblique cut-off forming portion 41A, the inner region 41B, the outer region 41C, and the connection region 41D direct part of the light from the second light emitting chip H2 (see FIG. 3) toward the lens 70. In order to make it a reflective surface to be reflected, like the first surface, for example, it is colored silver or white by performing vapor deposition or painting, and is in a highly reflective state.
Further, similarly to the first surface, not only coloring, but also, for example, a mirror surface finish may be applied so that the reflectance is high.

  And the uneven distribution of light of a high beam light distribution pattern (more specifically, high beam additional light distribution) can be suppressed by making the 2nd surface of the front additional area | region 41E into a reflection suppression surface in this way.

FIG. 7 is a diagram for explaining the effect when the second surface of the front additional region 41E is a reflection suppressing surface.
7, as shown on the left side of FIG. 7, three second light emission components located on the lower side of the second surface of the outer region 41 </ b> CA located on the left side (right side of FIG. 7) of the oblique cutoff forming portion 41 </ b> A of the light shielding unit 41. It is a figure which shows the light distribution pattern on the screen at the time of lighting chip | tip H2.

  In the figure showing the light distribution pattern on the screen arranged vertically on the right side, the VU-VL line indicates the vertical reference line on the screen, and the HL-HR line indicates the horizontal on the screen. The reference line is shown, and the light distribution pattern is represented by an isoluminous line. The same applies to the drawings showing the light distribution pattern on the screen shown below.

  In FIG. 7, the direction of the lamp optical axis Z (see FIG. 3) is indicated by the Z1 axis, the vertical direction is indicated by the Y axis, and the vehicle width direction (horizontal direction) is indicated by the X axis. , And the left end (right side in FIG. 7) of the oblique cut-off forming portion 41A.

  Specifically, the light distribution pattern on the upper screen was reflected by the second surface of the front additional region 41E when the second surface of the front additional region 41E was not used as a reflection suppressing surface but a reflection surface. It is the light distribution pattern which light forms.

  The light distribution pattern on the middle screen is formed as a whole by the light from the three second light emitting chips H2 when the second surface of the front additional region 41E is not a reflection suppression surface but a reflection surface. Since the light distribution pattern formed by the light reflected by the second surface of the front additional region 41E shown in the upper part is multiplexed, light distribution unevenness occurs in the region indicated by the dotted line. I understand that.

  On the other hand, the light distribution pattern on the lower screen is the light distribution pattern formed by the light reflected by the second surface of the front additional region 41E shown in the upper portion, with the second surface of the front additional region 41E as the reflection suppressing surface. Is a light distribution pattern as a whole formed by the light from the three second light emitting chips H2 when the light is not multiplexed, and it can be seen that the occurrence of light distribution unevenness is suppressed.

  In this way, uneven distribution of the high beam light distribution pattern (more specifically, high beam additional light distribution) can be suppressed by making the second surface of the front additional region 41E a reflection suppression surface.

  On the other hand, when the second surfaces of the oblique cut-off forming portion 41A, the inner region 41B, the outer region 41C, and the connection region 41D are simply reflecting surfaces, a high beam distribution pattern (more specifically, high beam addition) (Light distribution) may cause uneven light distribution, and a configuration for suppressing the uneven light distribution will be described.

FIG. 8 is a diagram for mainly explaining the second surfaces of the oblique cut-off forming portion 41A, the inner region 41B, the outer region 41C, and the connection region 41D of the light shielding portion 41.
Note that the Z1 axis, the Y axis, and the X axis in FIG. 8 are the same as those in FIG. 7, and the illustration of the front additional region 41E is omitted.

As shown in FIG. 6, the diagonal cut-off forming portion 41A is inclined upward from the right side to the left side (left side to right side in FIG. 6). As shown in FIG. A range of about 4.5 mm from the left end (right end in FIG. 8) to the left side (right side in FIG. 8) of the portion 41A is an inner region 41BA located on the left side (right side in FIG. 8) of the oblique cut-off forming portion 41A.
The inner area 41BA is an area extending horizontally on the left side (right side in FIG. 8).

  Then, as shown in FIG. 6, the connection region located on the left side (right side in FIG. 6) of the oblique cut-off forming portion 41A so as to incline downward from the left end (right end in FIG. 6) to the left side of the inner region 41BA. 41DA is connected, and as shown in FIG. 8, the width of the connection region 41DA in the left-right direction is about 2.0 mm.

  Further, an area connected to the left end (right end in FIG. 8) of the connection area 41DA and extending horizontally on the left side (right side in FIG. 8) is an outer area 41CA located on the left side (right side in FIG. 6) of the oblique cut-off forming portion 41A. It has become.

  On the other hand, the area on the right side from the right end (left end in FIG. 8) of the oblique cut-off formation portion 41A is a region extending in the horizontal direction, and the left end (right end in FIG. 8) of the oblique cut-off formation portion 41A is used as a reference. The right end (left end in FIG. 8) of the inner region 41BB located on the right side (left side in FIG. 8) connected to the right end (left end in FIG. 8) of the oblique cut-off formation portion 41A at a position of about 4.5 mm. ) Is located.

  Similarly to the previous case, the range of about 2.0 mm from the right end (left end in FIG. 8) to the right side (left side in FIG. 8) of the inner region 41BB located on the right side (left side in FIG. 8) of the oblique cut-off forming portion 41A is diagonally cut. The connection region 41DB is located on the right side of the off-forming portion 41A, and the right end (left end in FIG. 8) of the connection region 41DB is connected to the right end (left end in FIG. 8) of the connection region 41DB. The outer region 41CB is located on the right side (left side in FIG. 6) of the oblique cut-off forming portion 41A.

  Then, on the upper side of FIG. 8, the cross-section along the F1-F1 line and the cross-section along the F2-F2 line and the curve state C1 of the second surface of the inner region 41BB when viewed from the horizontal direction (X-axis direction). The curve state C2 of the second surface of the outer region 41CB when viewed from the horizontal direction (X-axis direction) is shown as “a second surface viewed in a cross section along the Z1 direction”.

  The curve state C1 and the curve state C2 are curved to the first surface side (upper side in FIG. 8) along the front-rear direction and inclined slightly upward from the rear side toward the front side. Since it is continuous in the horizontal direction, the inner region 41BB and the outer region 41CB located on the right side (left side in FIG. 8) of the oblique cut-off forming portion 41A are cylindrically shaped to be curved toward the first surface side in the front-rear direction. It has a 2nd surface formed in the curved surface.

  As can be seen from the curve state C1 and the curve state C2, the inner region 41BB has an average curvature of the second surface seen in the cross section along the front-rear direction of the outer region 41CB seen in the cross-section along the front-rear direction. It is smaller than the average curvature of the second surface.

That is, the inner surface 41BB has a second surface as a condensing reflection surface, and the outer region 41CB has a second surface as a diffuse reflection surface.
Further, although not shown in FIG. 8, the inner region 41BA and the outer region 41CA located on the left side (right side in FIG. 8) of the oblique cut-off forming portion 41A are the same, and therefore the inner region 41BA is the first region. Two surfaces are condensing and reflecting surfaces, and the outer region 41CA has a second surface that is a diffuse reflecting surface.

  Therefore, the light-shielding portion 41 of the shade 40 has a second surface in which the inner region 41B and the outer region 41C are formed in a cylindrical curved surface that curves toward the first surface along the front-rear direction, and the inner region 41B By changing the average curvature in the outer region 41C, specifically, the average curvature of the second surface seen in the cross section along the front-rear direction of the inner region 41B is equal to that of the outer region 41C seen in the cross-section along the front-rear direction. It is smaller than the average curvature of the second surface, and is separated from the inner region 41B on the side of the oblique cut-off forming portion 41A having the second surface as the light reflecting surface and the oblique cut-off forming portion 41A having the second surface as the diffuse reflection surface. The outer region 41 </ b> C is provided.

  The connection region 41D (connection region 41DA, connection region 41DB) is connected from the inner region 41B (inner region 41BA, inner region 41BB) to the outer region 41C (outer region 41CA, Towards the outer region 41CB), gradually changes from the average curvature of the second surface of the inner region 1B (inner region 41BA, inner region 41BB) to the average curvature of the second surface of the outer region 41C (outer region 41CA, outer region 41CB). The second surface is a gradually changing curved surface.

  On the other hand, in the present embodiment, the average curvature of the inner region 41BA located on the left side (right side in FIG. 8) of the oblique cut-off forming portion 41A and the inner region 41BB located on the right side (left side in FIG. 8) of the oblique cut-off forming portion 41A. The average curvature is slightly different, and the oblique cut-off forming portion 41A is arranged on the left side from the left side (right side in FIG. 8) to the right side (left side in FIG. 8) so that they can be connected without difficulty. The second surface is a gradually changing curved surface that gradually changes from the average curvature of the second surface of the region 41BA to the average curvature of the second surface of the inner region 41BB on the right side.

FIG. 9 is a diagram for explaining a light distribution unevenness suppressing effect by the second surfaces of the oblique cut-off forming portion 41A, the inner region 41B, the outer region 41C, and the connection region 41D of the light shielding portion 41.
Note that the Z1 axis and the Y axis in FIG. 9 are the same as those in FIGS.

  As shown on the left side of FIG. 9, FIG. 9 shows eight second positions located mainly on the right side (left side in FIG. 9) from near the oblique cut-off forming part 41A located on the lower side of the light shielding part 41 (second surface). It is a figure which shows the light distribution pattern on the screen at the time of lighting the light emitting chip H2.

  Specifically, the light distribution pattern on the upper screen is similar to that described above for the second surfaces of the oblique cut-off forming portion 41A, the inner region 41B, the outer region 41C, and the connection region 41D. Although it is formed in a cylindrical curved surface that is curved toward the first surface along the front-rear direction, it is a light distribution pattern in a case where the light-reflecting surfaces have substantially the same average curvature.

  In this way, a hot zone with a high luminous intensity is formed at the vertical reference line (VU-VL line), but uneven light distribution occurs in the area indicated by the dotted line.

  On the other hand, the light distribution pattern on the lower screen is a light distribution pattern in the present embodiment in which the average curvature is changed between the inner region 41B and the outer region 41C as described above, and the vertical reference line It can be seen that the (VU-VL line) is a hot zone having a high luminous intensity and a light distribution unevenness observed in the upper light distribution pattern.

  As described above, the present invention has been described based on the specific embodiments. However, the present invention is not limited to the above-described embodiments, and modifications and improvements to the above-described embodiments are also included in the technology of the invention. This is included in the scope, and it will be apparent to those skilled in the art from the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Lamp unit 10 Heat sink 11 Base part 11A Opening part 11F Radiation fin 12 1st base part 12A 1st light source arrangement | positioning part 12B Positioning pin 12C Screw fixing hole 12F 1st radiation fin 12N1, 12N2 Screw 13 2nd base part 13A 2nd light source Arrangement portion 13AA Positioning pin 13AB Screw fixing hole 13F Second radiation fin 13N1 Screw 14 Lens holder mounting portion 14A Positioning pin 14B Screw fixing hole 14N1 Screw 15 Cooling fan mounting leg 15N1 Screw 20 Cooling fan 30 Reflector 30A Reflector 30B Flange 30BA Pin insertion hole 30BB Screw insertion hole 31 Reflecting surface 40 Shade 41 Shading part 41A Oblique cut-off formation part 41B (41BA, 41BB) Inner area 41C (41CA, 41CB) Outer area 41D (41DA, 41DB) Contact Area 41E (41EA, 41EB) Front additional area 42 Arm part 42A Positioning pin insertion hole 42B Screw insertion hole 60 Lens holder 61 First holder 61A First holder body 61AA Receiving part 61AB Positioning protrusion 61B First mounting part 61BA Positioning pin insertion Hole 61BB Screw insertion hole 62 Second holder 62A Second holder main body portion 62AA Pressing portion 62B Second mounting portion 62BA Positioning pin insertion hole 62BB Screw insertion hole 70 Lens 71 Lens portion 71A Incident surface 71B Outgoing surface 72 Flange portion 72A Positioning recess 80 Light source holder BP Second focus H Second light source H1 Substrate H11 Positioning pin insertion hole H12 Screw insertion hole H2 Second light emitting chip L First light source L1 Substrate L2 First light emitting chip O Lens optical axis P Back focal point Z Lamp optical axis C1, C2 curve state 101L, 101R car Headlamp 102 vehicle use

Claims (7)

A first light source for low beam distribution;
A shade disposed on the front side of the first light source and having a first surface forming a cut-off line;
A second light source for high beam light distribution arranged so that a plurality of light emitting portions are located on the second surface side opposite to the first surface,
The shade is
An oblique cut-off forming portion;
An inner region on the side of the oblique cut-off forming part with the second surface as a light reflecting surface;
A vehicular lamp comprising: an outer region separated from the oblique cut-off forming portion, the second surface being a diffuse reflection surface.   The inner region has an average curvature of the second surface viewed in a cross section along the front-rear direction smaller than an average curvature of the second surface of the outer region viewed in a cross-section along the front-rear direction. Item 2. A vehicle lamp according to Item 1. The average curvature of the second surface is different between the inner region located on the left side of the oblique cutoff forming portion and the inner region located on the right side of the oblique cutoff forming portion,
The oblique cut-off forming portion gradually changes from the left side to the right side, gradually changing from the average curvature of the second surface of the inner region on the left side to the average curvature of the second surface of the inner region on the right side. The vehicular lamp according to claim 2, wherein the vehicular lamp includes the curved second surface. The shade includes a connection region provided between the inner region and the outer region,
The connection region is a gradually changing curved surface that gradually changes from the average curvature of the second surface of the inner region to the average curvature of the second surface of the outer region from the inner region toward the outer region. The vehicular lamp according to claim 2, wherein the vehicular lamp has the second surface.   The said inner side area | region and the said outer side area | region have the said 2nd surface formed in the cylindrical-shaped curved surface curved to the said 1st surface side along the front-back direction. 5. The vehicular lamp according to any one of 4 above. The shade includes a front additional region that is connected to the front side of the outer region, and that increases in width in the front-rear direction toward the direction away from the inner region in the left-right direction,
The said front addition area | region WHEREIN: The said 2nd surface is a reflection suppression surface which suppresses reflection of the light from the said 2nd light source, The any one of Claims 1-5 characterized by the above-mentioned. Vehicle lamp.   The vehicular lamp according to claim 6, wherein the reflection suppressing surface is a surface left as a material of the material forming the shade or a surface coated with a light absorbing color.