JP6711242B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a vehicle lamp.

Patent Document 1 discloses a vehicle lamp including a lamp unit capable of forming both a low beam light distribution pattern and a high beam light distribution pattern, and a plurality of light emitting chips are used for the high beam light distribution pattern. There is disclosed a vehicular lamp capable of performing a variable high beam (Adaptive Driving Beam) control that changes a light distribution pattern according to the positions of a preceding vehicle and an oncoming vehicle.

JP, 2016-039020, A

By the way, in recent years, as semiconductor-type light sources such as LEDs have become high-powered, semiconductor-type light sources such as LEDs are used as light sources for vehicle lamps as seen in Patent Document 1. Is becoming.

However, a light emitting chip of a semiconductor-type light source such as an LED has a low light emitting efficiency at high temperatures. Therefore, when a large number of light emitting chips serving as heat sources are used as in Patent Document 1, the light emitting efficiency may decrease. is there.

The present invention has been made in view of the above circumstances, and includes a first light source unit having a semiconductor-type first light emitting chip and a second light source unit having a semiconductor-type second light emitting chip. An object of the present invention is to provide a vehicular lamp having improved cooling efficiency.

The present invention is grasped by the following configurations in order to achieve the above object.
(1) A vehicular lamp of the present invention includes a first light source unit having a semiconductor-type first light emitting chip that emits light for low beam light distribution, and a high beam light distribution that is arranged in front of the first light source unit. A second light source unit having a semiconductor-type second light emitting chip that emits light for use in heat, and a heat sink in which the first light source unit and the second light source unit are arranged, and the heat sink is the first light source unit. And a base portion on which the second light source portion is disposed, and a fin portion having a heat radiation fin disposed on the back surface side of the base portion, the base portion including a horizontal portion on which the first light source portion is disposed. A gas that is provided at a position between the first light source unit and the second light source unit, and an inclined unit that extends diagonally forward from the front side of the horizontal unit and that arranges the second light source unit. An opening that can flow from the back surface side to the front surface side, and the fin portion extends rearward from the back surface of the inclined portion to a position of the horizontal portion on the front side of the first light source portion. The vertical fin portion includes a plurality of vertical fins arranged side by side in the horizontal direction, and the opening is provided so as to include a position corresponding to the vertical fin portion.

(2) In the configuration of (1) above, the second light source unit includes a second substrate arranged on the inclined portion of the base unit and the second light emitting chip provided on the second substrate. At least a part of the second substrate is provided with a substrate opening through which gas can flow from the back surface side to the front surface side, and the inclined portion of the base portion is also provided with the substrate opening of the second substrate. An opening through which gas can flow from the back surface side to the front surface side is provided at a position corresponding to.

(3) In the configuration of (1) or (2) above, the fin portion is provided rearward of the vertical fin portion, and a plurality of horizontal fins extending downward from the horizontal portion are arranged in the front-rear direction. It is equipped with a horizontal fin section.

(4) In the configuration of (3) above, the opening is provided in the horizontal portion on the front side of the horizontal fin portion.

(5) In the configuration according to any one of (1) to (4), at least the inner wall surface on the rear side of the opening is inclined forward from the lower side toward the upper side.

(6) In the configuration according to any one of (1) to (5) above, the lens disposed on the front side of the first light source section and the second light source section and the front side disposed on the horizontal section. A reflector that covers the first light source part in a semi-dome shape so as to open in the opening, and blocks a part of the light from the first light source part reflected by the reflector to form a cut-off line of a low-beam light distribution pattern. A shade, the shade being arranged on the opening, and guiding at least a part of the gas flowing out from the opening to the lens side.

(7) In the configuration according to any one of (1) to (6) above, the opening is provided up to a part of the inclined portion.

(8) In the configuration of any one of (1) to (7) above, a cooling fan is provided below the fin portion and blows gas toward the base portion side.

ADVANTAGE OF THE INVENTION According to this invention, it is a vehicle lamp provided with the 1st light source part which has a semiconductor type 1st light emitting chip, and the 2nd light source part which has a semiconductor type 2nd light emitting chip, and cooling efficiency improves. It is possible to provide the vehicle lighting device.

FIG. 1 is a plan view of a vehicle equipped with the vehicle lamp of the first embodiment according to the present invention. It is the front view which saw the lamp unit of 1st Embodiment which concerns on this invention from the front side. It is a vertical cross-sectional view along the lens optical axis of the lamp unit of the first embodiment according to the present invention. It is the perspective view which looked at a heat sink from the upper part of a 1st embodiment concerning the present invention mainly. It is a figure for demonstrating the modification of the heat sink of 1st Embodiment which concerns on this invention. It is the front view which looked at the lamp unit of 2nd Embodiment which concerns on this invention from the front side.

Hereinafter, modes for carrying out the present invention (hereinafter, referred to as “embodiments”) will be described in detail with reference to the accompanying drawings.
The same elements are denoted by the same numbers throughout the description of the embodiments.
Further, in the embodiment and the drawings, unless otherwise specified, “front” and “rear” indicate “forward direction” and “reverse direction” of the vehicle 102, and “up”, “down”, and “reverse direction”, respectively. “Left” and “right” respectively indicate directions viewed from the driver who gets on the vehicle 102.

(First embodiment)
The vehicular lamp according to the first embodiment of the present invention is a vehicular headlamp (101R, 101L) provided on each of the front left and right sides of the vehicle 102 shown in FIG. 1, and is hereinafter simply referred to as a vehicular lamp. To do.
In the following description of the lamp unit 10, the vehicle lamp on the right side of the vehicle will be mainly described as an example, but parts that are not particularly mentioned are common to the left and right vehicle lamps.

The vehicle lamp of the present embodiment includes a housing (not shown) that is open 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 of the housing and the outer lens. A lamp unit 10 (see FIGS. 2 and 3) and the like are arranged in the lamp chamber.

(Lighting unit 10)
2 is a front view of the lamp unit 10 as seen from the front side, FIG. 3 is a vertical cross-sectional view taken along the lens optical axis Z of the lamp unit 10, and FIG. 4 is a perspective view of the heat sink 40 as seen from above. It is a figure.
The Y axis in FIGS. 2 and 3 indicates the vertical axis passing through the rear focal point O of the lens 50.
Further, in FIG. 2, the lens 50 is omitted so that the inside can be seen.

As shown in FIG. 3, the lamp unit 10 of the present embodiment includes a first light source unit 20, a second light source unit 30, a heat sink 40, a lens 50, a reflector 60, a shade 70, a cooling fan 80. , Are provided.

(First light source unit 20)
The first light source unit 20 is a light source unit that emits light for low-beam distribution, and in the present embodiment, is provided on one first substrate 21 and the first substrate 21, and emits light for low-beam distribution. It is composed of one first light source 23 having one semiconductor-type first light emitting chip 22 that emits light.
However, the first light source unit 20 may be configured by a plurality of first light sources 23.
The first light source 23 used in the first light source unit 20 may have a configuration in which a plurality of first light emitting chips 22 are provided on one first substrate 21.

In the present embodiment, an LED chip that is a semiconductor-type light-emitting chip is used as the first light-emitting chip 22, but the first light-emitting chip 22 need not be limited to an LED chip. For example, a semiconductor-type light-emitting chip may be used. It may be an LD chip (laser diode chip).

(Second light source unit 30)
The second light source unit 30 is a light source unit that emits light for high-beam distribution, and in the present embodiment, as shown in FIGS. 2 and 3, one second substrate 31 and one second substrate 31 are provided. A plurality of semiconductor type second light emitting chips 32 (see FIG. 3) that emit light for high beam distribution arranged in the horizontal direction, and a second light source 33 (see FIG. 3) having A power supply connector 35 for power supply to which an external connector is connected is provided on the second board 31.
However, the second light source unit 30 may be configured by arranging a plurality of second light sources 33 having one second light emitting chip 32 on one second substrate 31 in the horizontal direction.

In the present embodiment, the cover 36 provided so as to cover the power supply connector 35 is also arranged on the second substrate 31 in order to prevent the power supply connector 35 from being seen from the outside.
However, the cover 36 may be provided on the base portion 41 of the heat sink 40 (for example, the inclined portion 43 described later).

Then, in the lamp unit 10 of the present embodiment, generation of glare light for the preceding vehicle and the oncoming vehicle is suppressed by controlling the turning on and off of the second light emitting chip 32 according to the positions of the preceding vehicle and the oncoming vehicle. In addition, variable high beam (adaptive driving beam) control for changing the high beam distribution pattern can be performed.

In the present embodiment, an LED chip, which is a semiconductor-type light emitting chip, is used as the second light emitting chip 32, like the first light emitting chip 22, but the second light emitting chip 32 need not be limited to an LED chip. For example, it may be an LD chip (laser diode chip) which is a semiconductor type light emitting chip.

As described above, in the present embodiment, the vehicle lamp on the right side is shown. Therefore, as shown in FIG. 2, when the lamp unit 10 is viewed from the front side, the rear focus O of the lens 50 is Four second light emitting chips 32 are arranged on the left side (vehicle outer side) and seven second light emitting chips 32 are arranged on the right side (vehicle inner side) with respect to the Y-axis which is a vertical axis passing through. On the contrary, in the case of the vehicular lamp, the four second light emitting chips 32 may be provided on the right side and the seven second light emitting chips 32 may be provided on the left side with respect to the Y axis.

However, when the inside/outside of the vehicle 102 is used as a reference, the inside of the vehicle and the outside of the vehicle are reversed between the right vehicle lamp and the left vehicle lamp.
That is, in the left vehicle lamp, the left side is the vehicle inner side and the right side is the vehicle outer side when viewed from the front. Therefore, the number of the second light emitting chips 32 based on the Y axis is expressed as the vehicle inner side and the vehicle outer side. When used, the same applies to the left and right vehicle lamps.

Further, the number of the second light emitting chips 32 need not be limited to 11, but may be appropriately adjusted in consideration of the horizontal light distribution range of the formed high beam light distribution pattern and the variable high beam (Adaptive Driving Beam) control. It may be changed.

(Heat sink 40)
As shown in FIGS. 3 and 4, the heat sink 40 includes a base portion 41 on which the first light source unit 20 (see FIG. 3) and the second light source unit 30 (see FIG. 3) are arranged, and a plurality of heat radiation fins (vertical fins). 47 and a fin portion 45 having a horizontal fin 49).
For example, the heat sink 40 is preferably formed of a metal material or a plastic material having a high thermal conductivity, and in this embodiment, the heat sink 40 made of aluminum die casting is used.

The base portion 41 has a horizontal portion 42 on which the first light source portion 20 is arranged, an inclined portion 43 that extends obliquely forward and downward from the front side of the horizontal portion 42, and the second light source portion 30 is arranged on the inclined portion 43. An opening 44 is provided at a position between the light source unit 20 and the second light source unit 30 and has an opening on the back surface side and the front surface side of the base unit 41.

On the other hand, the fin portion 45 is a vertical fin in which a plurality of vertical fins 47 extending rearward from the back surface of the inclined portion 43 to the position of the horizontal portion 42 on the front side of the first light source portion 20 are arranged side by side in the horizontal direction. And a horizontal fin portion 48 that is provided rearward of the vertical fin portion 46 and that has a plurality of horizontal fins 49 that extend downward from the back surface of the horizontal portion 42 and that are arranged side by side in the front-rear direction. There is.

(Lens 50)
The lens 50 is a member for irradiating light from the first light source unit 20 and the second light source unit 30 with light distribution control so as to form a predetermined light distribution pattern on the front side, and the lens holder 50a (see FIG. 2 and FIG. 3) (see FIG. 3).

The material forming the lens 50 is not particularly limited, and transparent glass, resin, or the like may be used, but from the viewpoint of good moldability, the lens 50 is formed of a transparent resin. preferable.
For example, for the lens 50, an acrylic resin, which has a small wavelength dependency of the refractive index and is easy to suppress the blue spectral color, can be preferably used.

When a large number of light emitting chips (the first light emitting chip 22 and the second light emitting chip 32) are used as in the present embodiment and heat resistance is desired, a resin having excellent heat resistance such as a polycarbonate resin is used. May be used for the lens 50.

The reflector 60 is arranged on the horizontal portion 42 of the base portion 41, and covers the first light source unit 20 in a semi-dome shape so as to open to the front side.
In the reflector 60, the surface facing the first light source unit 20 is formed on the reflecting surface 61, and the light emitted vertically upward from the first light emitting chip 22 of the first light source unit 20 is directed to the lens 50. And reflect.

The reflecting surface 61 has a curved surface shape forming a part of an elliptical shape, and is formed to have two focal points, a first focal point and a second focal point.
The reflector 60 has a first focus on the rear focus O of the lens 50 or in the vicinity of the rear focus O, and on the horizontal portion 42 so that the second focus is located at the light emission center of the first light emitting chip 22 or near the light emission center. It is located in.

(Shade 70)
The shade 70 shields a part of the light from the first light emitting chip 22 of the first light source unit 20 reflected by the reflector 60, and forms a cut-off line of the low beam light distribution pattern.
Therefore, as shown in FIG. 2, the front edge 71 of the shade 70 is formed in a shape that matches the cut-off line.

The shade 70 is arranged on the horizontal portion 42 of the heat sink 40 such that the portion forming the upper end portion of the oblique cutoff line of the edge portion 71 is located near the rear focal point O of the lens 50.
In the present embodiment, as shown in FIG. 3, the shade 70 is arranged on the horizontal portion 42 so that the rear focal point O of the lens 50 is located at a position approximately 1.0 mm rearward from the edge portion 71. There is.

In addition, as shown in FIG. 3, the shade 70 is arranged on the horizontal portion 42 of the heat sink 40 so as to be positioned on the horizontal portion 42 so as to be spaced slightly upward from the horizontal portion 42. ing.

(Cooling fan 80)
The cooling fan 80 is a member that blows gas such as air forcibly onto the fin portions 45 of the heat sink 40 to promote cooling of the heat sink 40.

Specifically, as shown in FIG. 4, an attachment leg portion 41 a for attaching the cooling fan 80 extends from the base portion 41 of the heat sink 40 to the lower side of the fin portion 45, and is attached to the attachment leg portion 41 a. Thus, the cooling fan 80 is arranged below the fin portion 45 so that the gas outlet side faces the fin portion 45 side.
Although only the two mounting legs 41a on the rear side can be seen in FIG. 4, the two mounting legs 41a are also provided on the front side, and the cooling fan 80 is mounted on the four mounting legs 41a. ing.

Regarding the lamp unit 10 having the above-described configuration, a more detailed configuration will be described while describing the flow of gas such as air from the cooling fan 80.
When the cooling fan 80 is driven, gas such as air is blown to the fin portion 45.

Specifically, as can be seen from FIG. 3, the cooling fan 80 is arranged so as to blow air on both the vertical fin portions 46 and the horizontal fin portions 48, and one of the winds generated by the cooling fan 80 is disposed. The section is blown toward the horizontal fin section 48.

The wind blown to the horizontal fin portion 48 passes between the plurality of horizontal fins 49 arranged in the front-rear direction, flows upward while removing the heat of the horizontal fins 49, and the first light source portion 20 of the horizontal portion 42. Hits the back side of the part where is placed.

Then, the wind whose upward flow is restricted by the back surface of the horizontal portion 42 flows further in the horizontal direction along the back surface of the horizontal portion 42 while removing heat from the horizontal portion 42, and the left and right sides of the heat sink 40. It is emitted outside the direction.

By the way, in order not to block the flow of gas (air or the like) from the cooling fan 80, it is important that the heat sink 40 efficiently discharges the wind.
However, in recent years, there has been a demand for downsizing of vehicle lamps, and in particular, there is a demand for downsizing in the front-rear direction.

For this reason, since the wall surface of the housing forming the lamp chamber tends to be close to the rear side of the lamp unit 10, the horizontal fins 49 of the horizontal fin portion 48 are used as vertical fins to discharge the wind to the rear side. Then, the wind cannot be emitted efficiently.

On the other hand, with respect to the left-right direction, a space for discharging the wind can be taken. Therefore, as in this embodiment, the rear side of the heat sink 40 is the horizontal fin portion 48 in which the horizontal fins 49 are arranged in the front-rear direction. Thus, it is possible to prevent the emission of wind from being obstructed.
Therefore, the flow of the air flowing between the horizontal fins 49 can be improved, and the first light source unit 20 can be efficiently cooled.

On the other hand, as described above, the front side of the heat sink 40 is the vertical fin portion 46 in which the vertical fins 47 are arranged in the horizontal direction (left-right direction).
The vertical fin portions 46 are formed by extending the vertical fins 47 from the back surface of the inclined portion 43 extending obliquely forward and downward from the front side of the horizontal portion 42 to the rear side.

For this reason, a part of the wind blown to the vertical fin portions 46 is not disturbed by the fins, and along the inclination of the inclined portion 43 toward the rear side from the lower side of the back surface of the inclined portion 43 to the upper side. It flows while touching the back side.
If the fins provided here are horizontal fins, the horizontal fins guide the lateral fins to the outside in the left and right directions, so that the fins cannot flow upward.
In particular, the back surface of the inclined portion 43 is inclined, unlike the vertical surface, so that the wind makes efficient contact with the back surface, and thus high heat dissipation efficiency can be obtained.

Then, as shown in FIGS. 3 and 4, in the horizontal portion 42 of the base portion 41, an opening portion 44 through which gas can flow from the back surface side to the front surface side is included so as to include a position corresponding to the vertical fin portion 46. Since it is provided, a part of the wind flowing upward in the vertical fin portion 46 flows out to the upper side of the heat sink 40 through the opening 44.

As described above, the opening 44 is provided at a position between the first light source unit 20 and the second light source unit 30, and the wind flowing out from the opening 44 is the light source unit (the first light source unit 20). Also, the heat of the second light source unit 30) is combined and blown out to a portion that easily becomes high in temperature, and high cooling efficiency can be obtained.

Since a gap is formed between the vertical fins 47 and the horizontal fin portions 48, the gas flowing between the vertical fins 47 in the portions where the openings 44 of the vertical fin portions 46 are not provided also flows. Without being obstructed, the air flows out horizontally through the gaps between the vertical fins 47 and the horizontal fin portions 48 so that the flow of wind is not stopped.

In the present embodiment, as shown in FIG. 3, since the shade 70 is provided on the opening 44, the gas blown upward from the cooling fan 80 has a horizontal flow direction by the shade 70. Since it is guided in the directions (leftward direction and rightward direction as viewed in FIG. 3), at least a part of the gas flowing out from the opening 44 is guided toward the lens 50 and the second light source unit 30 and flows out from the opening 44. At least a part of the gas is guided to the first light source unit 20 side.
Therefore, it is possible to cool together with the first light source unit 20 and the second light source unit 30, including the lens 50 that easily becomes high temperature due to radiant heat.

However, the shade 70 does not necessarily have to be located on the opening 44.
For example, if the second light source unit 30 is located slightly below and the opening 44 is provided up to a part of the upper side of the inclined portion 43, a part of the gas flowing out from the opening 44 will be removed. Since it can be made to flow out toward the front side, instead of positioning the shade 70 on the upper side of the opening 44, the opening 44 is provided up to a part of the upper side of the inclined portion 43. Good.

It should be noted that, with the shade 70 positioned above the opening 44, the opening 44 may be provided up to a portion above the inclined portion 43.
When the gas flowing out from the opening 44 is directed to the front side in this way, the gas flows even near the second light source unit 30, so that the second light source unit 30 can be cooled more efficiently.

Further, as can be seen from FIG. 3, the vertical fin portion 46 is configured such that the inclined fan 43 widens the cooling fan 80 side and narrows toward the upper side, so that the wind from the cooling fan 80 can be efficiently supplied. After being received, the flow velocity of the wind becomes higher toward the upper side, and it becomes easy to forcefully blow out from the opening 44.

Therefore, the air can be efficiently blown to the lens 50 side and the first light source unit 20 side, and the shade 70 of the gas blown toward the lens 50 side is the second light source unit 30. Combined with the fact that the shade 70 is extended upwards, the second light source unit 30 flows efficiently so that the second light source unit 30 flows in accordance with the fact that the horizontal portion 42 is no longer regulated on the front side of the shade 70. Cooling.

In addition, when the flow of the gas flowing out from the opening 44 is directed to the front side, the flow of the gas toward the first light source unit 20 side decreases, but as in the present embodiment, as compared with the first light source unit 20. In the case of the second light source unit 30 provided with a large number of light emitting chips, the amount of heat generated by the second light source unit 30 is large, and therefore, considering the overall cooling efficiency, the flow of gas flowing out from the opening 44 is It is preferable to direct it to the front side.

(Modification of heat sink 40)
Next, a modified example of the heat sink 40 will be described with reference to FIG.
FIG. 5 is a vertical sectional view of a modification of the heat sink 40 corresponding to FIG.
The modified example of the heat sink 40 shown in FIG. 5 has a basic configuration similar to that of the heat sink 40 described above, and therefore, different points will mainly be described below.

In the modification shown in FIG. 5, by devising the shape of the inner wall surface 44a of the opening 44, the flow of gas such as air flowing upward from the opening 44 can be easily directed to the front side.
Specifically, the opening 44 is formed such that the inner wall surface 44a on the rear side is inclined from the lower side to the upper side toward the front side, and when the gas passes through the inside of the opening 44, the front side is formed. I am trying to make a flow.
With this configuration, even when the shade 70 is not arranged on the opening 44, the flow of the gas flowing out from the opening 44 can be directed to the front side.

In the example shown in FIG. 5, the gas flowing out of the opening 44 is inclined in the front side in the range from the portion of the horizontal fin portion 48 located on the most front side to the inner wall surface 44a of the opening 44. Although it is made to flow to the front side, at least the inner wall surface 44a on the rear side of the horizontal portion 42 of the base portion 41 forming the opening 44 is an inclined surface that inclines forward toward the upper side. Good.

(Second embodiment)
Next, a lamp unit 10 according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a front view of the lamp unit 10 of the second embodiment as seen from the front side.
6 does not show the lens 50 as in FIG. 2, the lens 50 is attached to the lens holder 50a in the same manner as shown in FIG.
Further, the basic configuration of the lamp unit 10 of the second embodiment is also the same as that of the first embodiment, and hence the differences will be mainly described below, and the description of the same points may be omitted.

As shown in FIG. 6, the second substrate 31 disposed on the inclined portion 43 of the base portion 41 is provided below the second light emitting chip 32, and a substrate opening through which gas can flow from the back surface side to the front surface side. 31a is formed.
The inclined portion 43 of the base portion 41 is also provided with an opening 43a through which gas can flow from the back surface side to the front surface side at a position corresponding to the substrate opening 31a of the second substrate 31.
In FIG. 6, the vertical fins 47 visible through the substrate openings 31a and the openings 43a are not shown.

Therefore, the gas flows out from the substrate opening 31a toward the lens 50 side, so that the gas can flow to the lens 50 side more efficiently than the gas flowing out from the upper side of the heat sink 40, and the cooling effect of the lens 50 is enhanced. be able to.

In addition, since a part of the gas flowing out from the substrate opening 31a also flows to the second light emitting chip 32 side, the efficiency of cooling the second light emitting chip 32 (second light source unit 30) is further enhanced.

In this example, the substrate opening 31a is provided below the second light emitting chip 32. However, for example, when there is a space above the second light emitting chip 32, the substrate opening 31a is provided above. However, even in that case, the lens 50 can be cooled efficiently.

In this way, the substrate opening 31a is provided in at least a part of the second substrate 31, and the opening 43a is provided at a position corresponding to the substrate opening 31a of the inclined portion 43 so that the gas flows out toward the lens 50 side. As a result, the lens 50 and the second light source unit 30 can be further cooled, and the heat dissipation can be further enhanced.

The present invention has been described above based on the specific embodiments, but the present invention is not limited to the above embodiments.
For example, the cooling fan 80 may be omitted, and even when the cooling fan 80 is omitted, an ascending air current is generated when a gas such as air is warmed by the heat of the radiation fins (the vertical fins 47 and the horizontal fins 49). The gas flow as described above naturally occurs.
However, it goes without saying that it is preferable to provide the cooling fan 80 because the gas flow generated by the cooling fan 80 becomes stronger and high cooling efficiency can be obtained.

The horizontal width of the opening 44 may be changed as appropriate.
However, the width of the openings 44 in the horizontal direction is equal to or larger than the width in which the second light emitting chips 32 of the second light source sections 30 arranged in the horizontal direction are arranged in the horizontal direction, so that the second light source sections 30 are efficiently cooled. Therefore, it is preferable that the horizontal width of the openings 44 is equal to or larger than the horizontal arrangement width of the second light emitting chips 32.

Furthermore, in the above-described embodiment, as shown in FIG. 3, the vertical fins 47 are formed so as to extend into the opening 44, but it is not always necessary to form the vertical fins 47 into the opening 44. ..

As described above, the present invention is not limited to the above specific embodiments, and modifications and improvements made without departing from the technical idea are also included in the technical scope of the invention. It will be apparent to those skilled in the art from the description of the claims.

10 Lamp Unit 20 First Light Source 21 First Substrate 22 First Light Emitting Chip 23 First Light Source 30 Second Light Source 31 Second Substrate 31a Substrate Opening 32 Second Light Emitting Chip 33 Second Light Source 35 Power Supply Connector 36 Cover 40 Heat Sink 41 Base portion 41a Mounting leg portion 42 Horizontal portion 43 Sloping portion 43a Opening 44 Opening 44a Inner wall surface 45 Fin portion 46 Vertical fin portion 47 Vertical fin 48 Horizontal fin portion 49 Horizontal fin 50 Lens 50a Lens holder 60 Reflector 61 Reflecting surface 70 Shade 71 Edge portion 80 Cooling fan O Rear focus Z Lens optical axis 101L, 101R Vehicle headlight 102 Vehicle

Claims (8)

A first light source unit having a semiconductor type first light emitting chip that emits light for low beam distribution;
A second light source unit that is disposed on the front side of the first light source unit and that has a semiconductor-type second light emitting chip that emits light for high-beam distribution;
A heat sink in which the first light source unit and the second light source unit are arranged,
The heat sink is
A base portion on which the first light source portion and the second light source portion are arranged,
A fin portion having a radiation fin arranged on the back surface side of the base portion,
The base portion is
A horizontal portion for arranging the first light source portion,
An inclined portion extending from a front side of the horizontal portion to a diagonally lower side of the horizontal portion and arranging the second light source portion;
An opening provided at a position between the first light source unit and the second light source unit, through which gas can flow from the back surface side to the front surface side,
The fin portion includes a vertical fin portion in which a plurality of vertical fins extending rearward from the back surface of the inclined portion to the position of the horizontal portion on the front side of the first light source portion are arranged side by side in the horizontal direction. ,
The vehicular lamp is characterized in that the opening is provided so as to include a position corresponding to the vertical fin portion. The second light source unit,
A second substrate arranged on the inclined portion of the base portion;
And a second light emitting chip provided on the second substrate,
At least a part of the second substrate is provided with a substrate opening through which gas can flow from the back surface side to the front surface side,
The opening in which gas can flow from the back surface side to the front surface side is provided at a position corresponding to the substrate opening of the second substrate also in the inclined portion of the base portion. The vehicle lighting described. The fin portion includes a horizontal fin portion that is provided on the rear side of the vertical fin portion and has a plurality of horizontal fins extending downward from the horizontal portion and arranged side by side in the front-rear direction. The vehicle lighting device according to claim 1 or 2. The vehicular lamp according to claim 3, wherein the opening is provided in the horizontal portion on the front side of the horizontal fin portion. The vehicular lamp according to any one of claims 1 to 4, wherein at least the inner wall surface of the rear side of the opening is inclined forward from the lower side toward the upper side. A lens disposed in front of the first light source unit and the second light source unit,
A reflector that is arranged on the horizontal portion and covers the first light source portion in a semi-dome shape so as to open to the front side;
A shade for blocking a part of the light from the first light source unit reflected by the reflector and forming a cut-off line of a low-beam light distribution pattern,
The vehicle according to any one of claims 1 to 5, wherein the shade is arranged on the opening, and at least a part of gas flowing out from the opening is guided to the lens side. Lighting equipment. The vehicular lamp according to any one of claims 1 to 6, wherein the opening is provided up to a part of the inclined portion. The vehicle lamp according to any one of claims 1 to 7, further comprising a cooling fan that is disposed below the fin portion and blows gas toward the base portion side.

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