JP2017098064A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture capable of reducing deterioration of appearance.SOLUTION: A vehicular lighting fixture includes: a light source device for emitting light; and a reflection member for reflecting the light emitted from the light source device toward the vehicle front side. The reflection member includes: an opening; a first reflection part provided at least at an opening end on the vehicle rear side of the opening, and including a first reflection surface in which a first paraboloid whose focal point is a light emission part of the light source device is the reflection surface; and a second reflection part provided at an opening end of the vehicle front side of the opening, and including a second reflection surface in which a second paraboloid whose focal point is the light emission part is the reflection surface.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a vehicular lamp.

  2. Description of the Related Art Conventionally, a vehicular lamp includes a light source using a semiconductor light emitting element that emits excitation light and a phosphor that emits fluorescence when excited by the excitation light (for example, Patent Document 1 below). reference). In this vehicular lamp, the reflector is provided with a transmission portion so that excitation light is not directly emitted to the outside.

Japanese Patent No. 5657357

  However, in the above-described vehicular lamp, when the reflector is viewed from the front side of the vehicle, there is a possibility that a transmission portion provided in the reflector is visually recognized, which causes a decrease in appearance.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicular lamp that can reduce deterioration in appearance.

  According to one aspect of the present invention, it comprises: a light source device that emits light; and a reflective member that reflects light emitted from the light source device toward a vehicle front side, wherein the reflective member includes an opening; A first reflecting portion that is provided at least at an opening end of the opening on the vehicle rear side, and includes a first reflecting surface having a first paraboloid that focuses on the light emitting portion of the light source device, and the opening; There is provided a vehicular lamp having a second reflecting portion including a second reflecting surface that is provided at an opening end on the vehicle front side of the portion and has a second paraboloid as a reflecting surface with the light emitting portion as a focal point. The

  According to the vehicular lamp of this aspect, the positions of the first reflecting portion and the second reflecting portion in the vehicle front-rear direction are shifted, so that the opening end in the vehicle front-rear direction of the opening is in a state of approaching the vertical direction. For this reason, it is possible to make it difficult to visually recognize the opening when the reflective member is viewed from the front. Therefore, it is possible to reduce the appearance deterioration due to the visual recognition of the opening.

In the vehicular lamp, the coefficient of the quadratic term of the formula defining the second paraboloid is larger than the coefficient of the quadratic term of the formula defining the first paraboloid. desirable.
According to this configuration, the opening end on the vehicle front side of the opening can be positioned downward. Thereby, when the reflective member is viewed from the front, the opening can be made more difficult to visually recognize.

In the vehicular lamp, the second reflecting portion is provided with an inclined portion that is inclined toward the vehicle rear side at an end portion on the vehicle rear side, and the inclined portion is on an optical axis of the light source device. It is desirable to be located.
According to this configuration, for example, even when laser light is directly emitted from the light source device along the optical axis direction, it can be reflected to the vehicle rear side by the inclined portion. Therefore, it is possible to prevent the laser light from being reflected by the reflecting member and emitted to the outside.

Moreover, in the said vehicle lamp, it is desirable that the said 1st reflection part and the said 2nd reflection part are integrally formed.
According to this configuration, since the first reflecting portion and the second reflecting portion are integrally formed, it can be installed at a predetermined position with respect to the light source device. Therefore, the light emitted from the light source device can be favorably reflected and emitted to the outside.

The vehicular lamp further includes a shielding member that is disposed on the opposite side of the reflection member from the light source device, covers the opening, and shields light from the light source device emitted through the opening. It is desirable to prepare.
According to this configuration, it is possible to shield the laser light emitted from the light source device. Therefore, it is possible to prevent the problem that laser light is emitted to the outside.

Further, in the vehicle lamp, the light source device includes a semiconductor laser that emits laser light having anisotropy in a spread angle, and a wavelength conversion member that converts the wavelength of at least a part of the laser light, The planar shape of the opening is preferably a long shape having a long side in a direction in which the divergence angle of the laser beam is relatively large.
According to this configuration, laser light having anisotropy in the divergence angle can be incident on the opening. Thereby, it can prevent that a laser beam is inject | emitted outside by being reflected by a reflection part.

  According to the present invention, it is possible to reduce deterioration in appearance.

It is a perspective view which shows the structure of a vehicle lamp. (A) is a top view of a vehicular lamp, (b) is a side view of the vehicular lamp, and (c) is a front view of the vehicular lamp. It is sectional drawing which showed schematic structure of the light source device. It is a figure which shows the expansion of the laser beam inject | emitted from a semiconductor laser. It is a disassembled perspective view of a vehicle lamp. (A) is a top view of a reflector, (b) is sectional drawing of a reflector. It is a figure which shows the positional relationship of a 1st reflective surface, a 2nd reflective surface, and a light-projection part. It is a figure which shows the principal part structure of the periphery of a reflector. It is the figure which looked at the vehicle lamp from the vehicle rear side. (A) is sectional drawing by the AA arrow of FIG.2 (c), (b) is sectional drawing by the BB arrow of FIG.2 (c). (A) is a perspective view of the reflector which concerns on a modification, (b) is sectional drawing of a reflector, (c) is a front view of a reflector. It is a plane block diagram of the reflector which concerns on a modification.

  Hereinafter, a vehicular lamp that is an embodiment of the present invention will be described with reference to the drawings. In the drawings used in the following description, in order to make the features easy to understand, portions that become features may be shown in an enlarged manner for convenience, and the dimensional ratios and the like of each component are not always the same as actual.

  In the present embodiment, a reflector-type vehicular lamp configured to form a high-beam light distribution pattern is illustrated. The vehicular lamp according to the present embodiment is used to improve the distance visibility by, for example, additionally lighting in a normal high beam high illuminance zone.

  FIG. 1 is a perspective view showing a configuration of a vehicular lamp 100 according to the present embodiment. 2A is a plan view of the vehicular lamp 100 as viewed from above, FIG. 2B is a side view showing the vehicular lamp 100, and FIG. 2C shows the configuration of the vehicular lamp 100. FIG.

  In the drawings used for explanation in the present embodiment, an XYZ coordinate system may be used as a three-dimensional orthogonal coordinate system. Hereinafter, in the XYZ coordinate system, the X-axis direction is a direction parallel to the optical axis of the vehicle lamp 100, the Y-axis direction is a direction parallel to the left-right direction of the vehicle on which the vehicle lamp 100 is mounted, and the Z-axis direction. The direction is a direction orthogonal to the X-axis direction and the Y-axis direction. Further, the X-axis direction is the vehicle longitudinal direction, the Y-axis direction is the vehicle left-right direction, the Z-axis direction is the vehicle vertical direction, the + X side is the vehicle front side, the -X side is the vehicle rear side, the + Z side is simply the upper side, -Z The side may be referred to as the lower side.

  As shown in FIGS. 1 and 2, the vehicular lamp 100 according to this embodiment includes a light source device 10, a reflector (reflecting member) 15, a light shielding member 19, a heat sink 20, a blower fan 30, and a duct 40 (FIG. 5), a light detection device 50, and a control device 60. In addition, the control apparatus 60 is comprised from control circuits, such as ECU, for example, and controls each component (for example, the light source device 10, the light detection apparatus 50) of the vehicle lamp 100 as mentioned later.

FIG. 3 is a cross-sectional view illustrating a schematic configuration of the light source device 10.
As shown in FIG. 3, the light source device 10 includes a semiconductor laser 10a that emits laser light, a wavelength conversion member 10b that absorbs at least part of the laser light L from the semiconductor laser 10a and converts the wavelength, and a laser light L. And a condenser lens 10c for condensing the light on the wavelength conversion member 10b. In the present embodiment, the light source device 10 is reduced in size by arranging the wavelength conversion member 10b and the condenser lens 10c close to each other. For this reason, the condenser lens 10c having a short focal length is employed.

  The semiconductor laser 10a includes, for example, a semiconductor laser element that emits laser light. As the semiconductor laser element, for example, a laser diode having an emission wavelength of blue (about 450 nm) can be used. The emission wavelength of the semiconductor laser element is not limited to blue (about 450 nm).

The wavelength conversion member 10b includes, for example, a phosphor layer. The phosphor layer is composed of, for example, a composite (sintered body) of YAG and alumina Al ₂ O ₃ into which an activator such as cerium Ce is introduced.

  A part of the laser light L emitted from the semiconductor laser 10a is absorbed by the wavelength conversion member 10b and converted into yellow fluorescence YL. The remainder of the laser light L emitted from the semiconductor laser 10a passes through the wavelength conversion member 10b and is emitted as blue light BL. The wavelength conversion member 10b diffuses when transmitting the blue light BL. The diffused blue light BL is combined with the fluorescence YL to generate white light WL. The upper surface of the wavelength conversion member 10b constitutes a light emitting unit 9 that emits white light WL.

FIG. 4 is a diagram showing the spread of the laser light L emitted from the semiconductor laser 10a. As shown in FIG. 4, the semiconductor laser 10a has a rectangular light exit 10a1. The laser light L emitted from the light emission port 10a1 is irradiated at a wider angle in the short side direction than in the long side direction of the light emission port 10a1. In this embodiment, it arrange | positions so that the long side direction of the light emission opening 10a1 may face the vehicle front-back direction. That is, the laser light L is emitted from the light exit 10a1 so as to spread more in the vehicle left-right direction than in the vehicle front-rear direction.
In the present embodiment, the laser beam L is focused on the surface of the wavelength conversion member 10b so as to form a focused spot having substantially the same shape as the light exit port 10a1.

  Since the light source device 10 uses the semiconductor laser 10a, the temperature of the light source device 10 becomes higher due to heat generation than a light source using a light emitting diode. Therefore, it is necessary to efficiently reduce the heat of the light source device 10. The light source device 10 of this embodiment reduces the heat of the semiconductor laser 10a by dissipating heat generated in the light source device 10 by a heat sink 20 described later.

  White light WL emitted from the light source device 10 enters the reflector 15. The reflector 15 reflects the light WL from the light source device 10 toward the front side of the vehicle. Light WL emitted from the reflector 15 is irradiated forward to form a basic light distribution pattern (high beam light distribution pattern) on the virtual vertical screen.

FIG. 5 is an exploded perspective view of the vehicular lamp 100.
As shown in FIG. 5, the light source device 10 is attached to the heat sink 20 via the attachment plate 11. The mounting plate 11 is fixed to the heat sink 20 together with the light source device 10 by two screw members 12. A heat conduction member 13 is disposed between the light source device 10 and the heat sink 20. The heat conducting member 13 is made of, for example, grease, and reduces the thermal resistance between the light source device 10 and the heat sink 20 by increasing the contact area. Thereby, the heat of the light source device 10 is favorably transmitted to the heat sink 20 side.

The reflector 15 is attached to the heat sink 20 by a screw member 16.
The shielding member 35 is attached to the reflector 15 by the screw member 16. The shielding member 35 covers an opening 71 provided in the reflector 15 described later. That is, the screw member 16 attaches the shielding member 35 and the reflector 15 to the heat sink 20.

FIG. 6 is a diagram showing a configuration of the main part of the reflector 15, FIG. 6A is a plan view of the reflector 15, and FIG. 6B is a cross-sectional view of the reflector 15.
As shown in FIGS. 6A and 6B, the reflector 15 of the present embodiment includes a first reflecting portion 72, a second reflecting portion 73, and an opening 71.

  The first reflecting portion 72 is provided at the opening end 71 a on the vehicle rear side of the opening 71. The first reflecting portion 72 has a first reflecting surface 72a on the inner surface side. The first reflecting surface 72 a includes a paraboloid (first paraboloid) 72 a 1 that focuses on the light emitting unit 9 of the light source device 10.

  The second reflecting portion 73 is provided at the opening end 71 b on the vehicle front side of the opening 71. The second reflecting portion 73 has a second reflecting surface 73a on the inner surface side. The second reflecting surface 73 a includes a paraboloid (second paraboloid) 73 a 1 that focuses on the light emitting unit 9 of the light source device 10. That is, the paraboloids 72a1 and 73a1 constituting the first reflecting surface 72a and the second reflecting surface 73a have a common focal point.

The first reflection surface 72a and the second reflection surface 73a are reflection surfaces configured to reflect light from the light source device 10 and to form a high beam light distribution pattern on a virtual vertical screen facing the front surface of the vehicle. is there.
In the present embodiment, the first reflection surface 72a and the second reflection surface 73a reflect light from the light source device 10 as parallel light substantially parallel to the optical axis AX (see FIG. 1).

  The opening 71 is formed immediately above the light source device 10, specifically, at a portion where the laser light L is incident when the laser light L is directly emitted from the light source device 10 as described later. In the present embodiment, the planar shape of the opening 71 is a long shape having long sides in the left-right direction of the vehicle. The left-right direction of the vehicle coincides with the direction in which the divergence angle of the laser light L emitted from the semiconductor laser 10a (light emission port 10a1) is relatively large (see FIG. 5). That is, the opening 71 can satisfactorily capture the laser light L emitted from the light emission port 10a1.

  As shown in FIG. 6A, the first reflecting portion 72 and the second reflecting portion 73 are integrally formed at a position where the opening 71 is not formed. For this reason, the first reflecting portion 72 and the second reflecting portion 73 can be handled as one member, and no positional deviation occurs, so that alignment is not necessary.

  By the way, the vehicular lamp 100 may be viewed from the front side of the vehicle. In this case, when the opening 71 formed in the reflector 15 is viewed from the front side, it becomes a factor of deteriorating appearance.

  On the other hand, in this embodiment, as described later, the openings 71 are made difficult to visually recognize from the vehicle front side by devising the shapes of the first reflecting surface 72a and the second reflecting surface 73a. Thereby, the fall of the appearance by opening part 71 being visually recognized is prevented.

  FIG. 7 is a diagram showing the positional relationship between the first reflecting surface 72 a, the second reflecting surface 73 a, and the light emitting unit 9. In FIG. 7, the end portion of the first reflecting surface 72a on the vehicle front side (hereinafter referred to as the upper end) is denoted by reference numeral 75, and the end portion of the first reflecting surface 72a on the vehicle rear side (hereinafter referred to as the lower end). Is denoted by reference numeral 76, an end of the second reflecting surface 73a on the vehicle front side (hereinafter referred to as an upper end) is denoted by reference numeral 77, and an end of the second reflecting surface 73a on the rear side of the vehicle (hereinafter referred to as a lower end). .) Is indicated by reference numeral 78.

As shown in FIG. 7, the second reflecting portion 73 is located on the vehicle front side of the first reflecting portion 72. In the present embodiment, the paraboloidal surfaces 72a1 and 73a1 constituting the first reflecting surface 72a and the second reflecting surface 73a are focused on the light emitting portion 9. Therefore, the coefficient a of the quadratic term of the equation (for example, ax ² ) that defines the parabolic surface 73a1 that constitutes the second reflecting surface 73a is the equation that defines the parabolic surface 72a1 that constitutes the first reflecting surface 72a. It becomes larger than the coefficient b of the quadratic term of (for example, bx ² ). That is, the second reflecting surface 73a has a shape that is curved (curved) to a greater extent than the first reflecting surface 72a.

  Thus, in the present embodiment, the second reflecting portion 73 having the second reflecting surface 73a having a large curve is disposed at the opening end 71a on the vehicle front side of the opening 71, and the opening end on the vehicle rear side of the opening 71 is provided. A first reflecting portion 72 having a first reflecting surface 72a having a small curve is disposed on 71b.

  Thereby, the lower end 78 of the second reflecting surface 73a can be brought close to the vicinity of the upper end 75 of the first reflecting surface 72a in the vehicle vertical direction. In other words, the vertical distance between the lower end 78 defining the opening end of the opening 71 on the vehicle front side and the upper end 75 defining the opening end of the opening 71 on the vehicle rear side can be reduced.

  Specifically, in the present embodiment, the lower end 78 of the second reflecting surface 73a and the upper end 75 of the first reflecting surface 72a are positioned at the same height in the vehicle vertical direction, or the lower end 78 is positioned lower than the upper end 75. ing.

  When the lower end 78 and the upper end 75 satisfy the above-described relationship, when the reflector 15 is viewed from above the optical axis AX and from the front side of the vehicle, the second reflecting surface 73a and the first reflecting surface 72a have the lower end 78 having the upper end 75. It will be covered. Therefore, as shown in FIG.2 (c), the opening part 71 is not visually recognized from the vehicle front side. As described above, according to the present embodiment, it is possible to reduce deterioration in appearance due to the opening 71 being viewed from the front side of the vehicle.

  As a condition that the opening 71 is not visually recognized from the front side of the vehicle, the upper end 75 is located above (including on the straight line) above the straight line connecting the visual recognition position (viewer's eye level) and the lower end 78. That's fine. That is, the lower end 78 and the upper end 75 do not necessarily have to be positioned at the same height in the vehicle vertical direction. For example, when the opening 71 is not visible from a position higher than the optical axis AX, the vehicle vertical direction In this case, the height of the upper end 75 may be lower than the height of the lower end 78.

  Moreover, in this embodiment, in order to form the 2nd reflective surface 73a with a large curve in the vehicle forward side of the opening part 71, for example, the reflector which formed the opening part 71 in the 1st reflective part 72 (only from one reflective surface) The height in the vertical direction of the vehicle can be suppressed as compared to the configured reflector. Therefore, by suppressing the size of the reflector 15, the vehicle lamp 100 can be reduced in size as a result.

  By the way, in the light source device 10, the wavelength conversion member 10b may be in a state of being dropped or missing, for example. In this case, the laser light from the light source device 10 may directly enter the reflector 15 and be emitted to the outside.

  On the other hand, the reflector 15 of this embodiment forms the opening part 71 formed in the part into which the laser beam from the light source device 10 directly enters as described above. Therefore, for example, when the wavelength conversion member 10 b is dropped (or missing) in the light source device 10, the laser light emitted from the light source device 10 in the state where the wavelength conversion member 10 b is dropped (or missing) passes through the opening 71. It becomes like this. Therefore, it is possible to suppress the laser light emitted from the light source device 10 in a state where the wavelength conversion member 10b has been dropped (or lost) being reflected by the reflector 15 and being emitted to the outside.

FIG. 8 is a diagram showing a main configuration around the reflector 15.
In the present embodiment, as shown in FIG. 8, the second reflecting portion 73 has an inclined surface 80 (open end 71b) at the end on the vehicle rear side. The inclined surface 80 is inclined toward the vehicle rear side. It is preferable to set the inclination angle θ _{1 on the} inclined surface 80 with respect to the optical axis AX1 of the light source device 10 (light emitting portion 9) to 0 ° to 40 °. Specifically, in this embodiment, by setting the inclination angle theta ₁ for example 20 °.

  According to the inclined surface 80, the laser light emitted from the light source device 10 can be reflected toward the vehicle rear side. In this embodiment, the shielding member 35 which covers the opening part 71 is arrange | positioned on the outer surface side which is the light source device 10 side of the reflector 15 (refer FIG. 5). The shielding member 35 is made of black metal and shields the laser light reflected by the inclined surface 80.

  As illustrated in FIG. 8, the vehicular lamp 100 according to the present embodiment includes a light shielding member 19 that shields light emitted from the light source device 10 toward the front side of the vehicle and not incident on the reflector 15. Here, the light that is emitted to the front side of the vehicle and does not enter the reflector 15 may directly enter the eyes of a person located on the front side of the vehicle. That is, the light shielding member 19 is a member having a function for preventing the light emitting portion 9 of the light source device 10 from being directly viewed from the front side of the vehicle.

  In the present embodiment, the light shielding member 19 is formed integrally with the reflector 15. The light shielding member 19 includes an upper light shielding member 19a and a lower light shielding member 19b.

  The upper light shielding member 19a is provided at the end of the reflector 15 on the vehicle front side. The upper light shielding member 19a is disposed at a position that blocks light (light indicated by reference numeral L1 in FIG. 8) that is emitted from the light emitting unit 9 of the light source device 10 and is not incident on the first reflecting surface 72a or the second reflecting surface 73a. It is arranged at a position where it does not block the reflected light from the first reflecting surface 72a or the second reflecting surface 73a.

  The lower light shielding member 19b is disposed below the upper light shielding member 19a and on the rear side of the vehicle and in the vicinity of the light source device 10. The lower light shielding member 19b is a position that blocks light (light indicated by reference numeral L2 in FIG. 8) that is emitted from the light emitting unit 9 of the light source device 10 and is not incident on the first reflecting surface 72a or the second reflecting surface 73a, and It is arranged at a position where it does not block the reflected light from the first reflecting surface 72a or the second reflecting surface 73a.

  The light detection device 50 includes a light detection unit 52 disposed on the vehicle rear side of the reflector 15. The light detection unit 52 detects a part of the light emitted from the light source device 10 through the opening 15 b provided in the reflector 15. The opening 15 b is formed at a position facing the light detection unit 52 in the reflector 15. As the light detection unit 52, for example, a photodiode can be used.

  In the present embodiment, an optical system such as a reflective surface is formed on the reflector 15 in order to directly detect a part of the light emitted from the light source device 10 by the light detection unit 52 disposed on the vehicle rear side of the reflector 15. There is no need. Therefore, since the size of the reflector 15 can be suppressed, the vehicular lamp 100 can be reduced in size.

  The light detection device 50 is electrically connected to the control device 60 and transmits a detection result to the control device 60. The control device 60 controls driving of the light source device 10 based on the detection result of the light detection device 50.

  As shown in FIG. 8, the light detection unit 52 is disposed on the vehicle rear side of the light source device 10 with respect to the light reflection direction (optical axis AX direction) of the reflector 15 with respect to the lower light shielding member 19 b (light shielding member 19). At the same time, it is located below the light shielding member 19.

  Here, in the light source device 10, since the light emitted from the light emitting unit 9 has a Lambertian light distribution, the angle θ with respect to the optical axis AX <b> 1 of the light emitting unit 9 (hereinafter sometimes referred to as the light emitting angle θ). As the value increases, the amount of light decreases. That is, the light emitted from the light emitting portion 9 has the maximum light quantity in the optical axis AX1 direction (light emission angle θ = 0 °), and the light quantity decreases as the light emission angle θ increases.

  In the present embodiment, the light detection unit 52 detects light (light indicated by reference numeral L3 in FIG. 8) having a light emission angle θ of 75 ° to 85 ° from the light emitted from the light emission unit 9. In the present embodiment, for example, light having a light emission angle θ of 80 ° is detected.

  In the present embodiment, the first reflecting surface 72a and the second reflecting surface 73a of the reflector 15 reflect light in a direction substantially parallel to the optical axis AX. However, in the present embodiment, as described above, the light source holding portion 22 is inclined by a predetermined angle with respect to the horizontal plane (XY plane), and the light source device 10 is inclined by the predetermined angle to the vehicle rear side with respect to the horizontal plane. Is held in. For this reason, even if the light having the light emission angle θ as described above (light of 75 ° to 85 °) is reflected by the first reflecting surface 72a, it is shielded by the light shielding member 19 that is inclined together with the light source holding portion 22. Therefore, it cannot be irradiated forward as desired light (light substantially parallel to the optical axis AX) and cannot be utilized as a basic light distribution pattern (high beam light distribution pattern). That is, by using the light with the light emission angle θ described above for detection by the light detection unit 52, the light cannot be used as a basic light distribution pattern (high beam light distribution pattern) without affecting the light amount of the basic light distribution pattern. Light can be used efficiently.

  In the present embodiment, the light detection unit 52 is held at the position away from the reflector 15 by holding the light detection unit 52 on the first member 21 (detection device holding portion 23) of the heat sink 20. The influence of light other than the light emitted from the vehicle (for example, disturbance light such as sunlight or light from an oncoming vehicle) is suppressed. Further, in the present embodiment, the lower light shielding member 19b disposed on the vehicle front side of the opening 15b suppresses disturbance light from directly entering the light detection unit 52.

  The light detection device 50 further includes a cover member 53 that covers the light detection unit 52. The cover member 53 has an opening 53 a that transmits part of the light from the light source device 10 and enters the light detection unit 52. Since the cover member 53 blocks disturbance light, the S / N ratio of the photodiode (light detection unit 52) can be improved.

The light detection device 50 may further include an optical filter between the opening 53a and the light detection unit 52. As an optical filter, for example, only a part of the light from the light source device 10 that has passed through the opening 53a (yellow fluorescence YL wavelength-converted by the wavelength conversion member 10b) is transmitted, and other band light is not transmitted. A filter can be used.
In this way, light other than the fluorescence YL (for example, disturbance light such as sunlight or light from an oncoming vehicle) can be prevented from entering the light detection unit 52, and thus the photodiode (light detection unit 52). The S / N ratio can be further improved.

  Further, a photodiode having a light receiving angle designed to be a narrow angle may be used as the light detection unit 52. In this way, the influence of disturbance light can be reduced, and the detection accuracy of the light detection unit 52 can be improved.

  The blower fan 30 is attached to the heat sink 20 by a screw member 31. The blower fan 30 is for improving the cooling performance of the heat sink 20 by blowing air to the heat sink 20. The blower fan 30 is composed of, for example, an axial flow type fan. The blower fan 30 is electrically connected to the control device 60 and its drive is controlled.

FIG. 9 is a view of the vehicular lamp 100 viewed from the rear side of the vehicle. In addition, illustration of the ventilation fan 30 is abbreviate | omitted in FIG.
As shown in FIG. 9, the vehicular lamp 100 includes a duct 40 through which wind (air blowing) generated by the blower fan 30 flows. The duct 40 is provided between the light source device 10 and the blower fan 30 and supplies wind from the blower fan 30 from the vehicle rear side toward the vehicle front side.

The outer shape of the connection portion of the duct 40 with the blower fan 30 is desirably the same as or larger than the outer shape of the blower fan 30. The connection part with the ventilation fan 30 in the duct 40 is a part shown by the area | region S of FIG. In the present embodiment, the outer shape of the connection portion 40 a is approximately the same as the outer shape of the blower fan 30.
According to this configuration, almost all of the wind generated by the blower fan 30 can be taken into the duct 40, so that the wind generated by the blower fan 30 can be used without waste.

  The duct 40 of the present embodiment has a ventilation port 41 (see FIG. 5) described later. The ventilation opening 41 is for guiding a part of the wind flowing in the duct 40 to an upper space (a space inside the reflector 15) as described later. The ventilation port 41 is located in the center part where the light source device 10 is arranged in the vehicle left-right direction of the duct 40.

  In the present embodiment, a part of the heat sink 20 also serves as a component part of the duct 40. That is, the duct 40 of the present embodiment is configured by a part of the heat sink 20. Details of the duct 40 will be described later.

  Returning to FIG. 5, the heat sink 20 includes a first member 21 and a second member 25. The first member 21 is directly connected to the light source device 10. The second member 25 is a member that indirectly releases heat from the light source device 10 through the first member 21 by being connected to the first member 21.

  The 1st member 21 and the 2nd member 25 are comprised from material with high heat dissipation, such as aluminum, for example. The heat sink 20 of the present embodiment uses a plurality of members (first member 21 and second member 25) to realize a complicated shape that also serves as the duct 40 (see FIG. 9) as described above.

  The first member 21 and the second member 25 are fixed to each other by a screw member 26. The heat conducting member 7 is disposed between the first member 21 and the second member 25. The heat conducting member 7 is made of, for example, grease, and reduces the thermal resistance between the two by increasing the contact area between the first member 21 and the second member 25. Thereby, the heat of the light source device 10 is favorably transmitted to the second member 25 side via the first member 21. That is, the heat of the light source device 10 is favorably transmitted to the entire heat sink 20.

10A is a cross-sectional view taken along line AA in FIG. 2C, and FIG. 10B is a cross-sectional view taken along line BB in FIG.
As shown in FIGS. 5 and 10A, the first member 21 holds a pair of side plate portions 21a, a top plate portion 21b, a light source holding portion 22 that holds the light source device 10, and a light detection device 50. And a plurality of fins 24.

  A pair of side plate portions 21a arranged in parallel with each other in the vehicle left-right direction are connected via a top plate portion 21b. The pair of side plate portions 21 a and the top plate portion 21 b are constituent members of the duct 40.

  The light source holding portion 22 is connected to the pair of side plate portions 21a and the top plate portion 21b on the vehicle rear side (see FIGS. 5 and 10B). The vent hole 41 is located at a connection portion between the light source holding portion 22 and the top plate portion 21b.

  The detection device holding portion 23 is sandwiched between the pair of side plate portions 21a and is connected to the top plate portion 21b on the lower end side. The ventilation port 41 is located at a connection portion of the detection device holding portion 23 with the top plate portion 21b.

  As shown in FIG. 5, the light source holding portion 22 fixes the screw hole portion 22 a for attaching the screw member 12 for fixing the attachment plate 11, the through hole 22 b for holding the light source device 10, and the reflector 15. And a screw hole portion 22c for attaching the screw member 16 to be mounted.

  The light source control circuit board 61 is fixed to the lower surface side of the light source holding portion 22 by a screw member 62. Therefore, a plurality of fins 24 are not formed on the portion of the lower surface of the light source holding portion 22 where the light source control circuit board 61 is disposed.

  The light source control circuit board 61 supplies power and drive signals to the light source device 10. A thermistor (not shown) is mounted on the light source control circuit board 61, and the temperature of the light source device 10 (semiconductor laser 10a) can be measured. The light source control circuit board 61 is electrically connected to the control device 60. The control device 60 controls driving of the light source device 10 via the light source control circuit board 61.

In the present embodiment, the light detection device 50 is fixed to the detection device holding portion 23 with a screw member 51. The detection device holding portion 23 has a screw hole portion 23 a for attaching the screw member 51.
As shown in FIGS. 10A and 10B, the light source holding portion 22 is inclined by a predetermined angle with respect to the horizontal plane (XY plane), and the light source device 10 is moved by a predetermined angle toward the vehicle rear side with respect to the horizontal plane. It is possible to hold it in an inclined state. The detection device holding portion 23 is disposed above the light source holding portion 22 and has a shape in which the upper end portion is inclined by a predetermined angle toward the vehicle rear side (−X direction side) with respect to the lower end portion side.
In this way, the light detection device 50 held on the detection device holding portion 23 can satisfactorily detect a component at a predetermined angle in the light emitted from the light source device 10 held on the light source holding portion 22. is there.

  The plurality of fins 24 are radiating fins for efficiently releasing the heat generated in the light source device 10 by increasing the contact area with air. The plurality of fins 24 are made of plate-like members extending in the vehicle front-rear direction, and are arranged in parallel with the pair of side plate portions 21a in the vehicle left-right direction (see FIG. 5). Some of the plurality of fins 24 connect the top plate portion 21 b and the detection device holding portion 23.

  As shown in FIG. 10, the second member 25 includes a bottom plate portion 27, a pair of side plate portions 28, and a connecting portion 29. The bottom plate portion 27 and the pair of side plate portions 28 form the duct 40 together with the first member 21. The connecting portion 29 is connected to the end portion 28 a on the vehicle front side of the pair of side plate portions 28. The connecting portion 29 is connected to the lower surface of the light source holding portion 22 of the first member 21 through the heat conducting member 7 described above. A through hole 29 a for inserting the screw member 26 is formed in the connecting portion 29.

  A plurality of fins 34 are formed on the lower surface of the connecting portion 29. The plurality of fins 34 are radiating fins for efficiently releasing the heat generated in the light source device 10 by increasing the contact area with air. The plurality of fins 34 are plate-like members extending in the vehicle front-rear direction, and are arranged in parallel with the pair of side plate portions 28 in the vehicle left-right direction.

  In the present embodiment, the connecting portion 29 has a recess 29c. The recess 29c is for avoiding interference with the light source control circuit board 61 attached to the first member 21 (light source holding portion 22). The plurality of fins 34 are also formed on the lower surface of the recess 29c.

  In the heat sink 20 of the present embodiment, the fins 24 cannot be formed on the lower surface of the first member 21 due to the arrangement of the light source control circuit board 61 on the lower surface of the first member 21, but the fins on the lower surface side of the connecting portion 29. By providing 34, the cooling performance under the light source device 10 is improved.

  In addition, in the light source holding portion 22 of the present embodiment, an inclined portion 70 is formed at a position from the end on the blower fan 30 side to the vicinity immediately below the light source device 10. The inclined portion 70 has a shape gently inclined downward from the end on the blower fan 30 side to the vicinity immediately below the light source device 10. Further, the inclined portion 70 is formed with a width substantially the same as the width of the light source device 10 in the Y-axis direction, and is located at a position where the light source device 10 does not exist (refer to the BB cross-sectional view of FIG. Is not provided. The effect brought about by the inclined portion 70 will be described later.

Next, the configuration of the duct 40 will be described.
As shown in FIGS. 10A and 10B, the top plate portion 21b constituting a part (upper surface portion) of the inner surface of the duct 40 extends obliquely upward from the light source device 10 side toward the blower fan 30 side. . On the other hand, the bottom plate portion 27 constituting a part of the inner surface (lower surface portion) of the duct 40 is a horizontal plane from the light source device 10 side toward the blower fan 30 side.

  The duct 40 of the present embodiment has a tapered shape in which the flow path R is enlarged toward the reflector 15 side (the upper side of the light source device 10). Therefore, the duct 40 can be installed in a space generated on the vehicle rear side of the reflector 15, and the vertical size of the device configuration can be prevented from increasing.

In the present embodiment, a plurality of fins 24 are arranged in the duct 40. Therefore, a plurality of flow paths R partitioned by the fins 24, the top plate portion 21b, and the bottom plate portion 27 are formed in the duct 40 (see FIG. 9).
In the present embodiment, since the fins 24 constitute the flow path R, the heat of the first member 21 can be efficiently released by the air flowing through the flow path R.

  In the duct 40, the height of the flow path R on the light source device 10 side (the height in the Z-axis direction) is smaller than the height of the flow path R on the blower fan 30 side (the height in the Z-axis direction). That is, in the duct 40, the cross-sectional area of the flow path R on the light source device 10 side is smaller than the cross-sectional area of the flow path R on the blower fan 30 side. Similarly, in the inclined portion 70 provided in the light source holding portion 22, the height of the flow path R on the light source device 10 side of the duct 40 (the height in the Z-axis direction) is the height of the flow path R on the blower fan 30 side. It is formed to be smaller than the height (the height in the Z-axis direction).

  In the present embodiment, the flow path R has a tapered shape, and the cross-sectional area of the flow path R gradually changes. According to this configuration, by gradually changing the cross-sectional area of the flow path R, the pressure loss in the duct 40 can be reduced and air can flow smoothly.

The flow of air sent into the flow path R of the duct 40 includes an obliquely downward flow toward the light source device 10 along the top plate portion 21b and a flow toward the light source device 10 along the bottom plate portion 27. Included (see FIGS. 10A and 10B).
In this embodiment, since the cross-sectional area of the flow path R becomes smaller toward the light source device 10 side, if the flow rate of air flowing through the duct 40 is substantially constant, the air flow in the flow path R is The wind speed increases as it approaches 10 side. Further, the air flowing in the duct 40 flows into the reflector 15 (above the light source device 10) through the ventilation port 41 and passes in the vicinity of the light source device 10 (see FIG. 10B).

  Therefore, according to the vehicular lamp 100 of the present embodiment, the wind speed of the air flowing in the duct 40 becomes faster as it approaches the light source device 10 side, so that air with high wind speed is located below the light source device 10 that is the outlet of the duct 40. Can be supplied. Since the plurality of fins 34 are disposed below the light source device 10, the heat of the second member 25 is efficiently released through the plurality of fins 34. Since the second member 25 is thermally connected to the first member 21 that holds the light source device 10, the heat generated in the light source device 10 can be efficiently released. Therefore, the heat sink 20 can efficiently dissipate the heat generated in the light source device 10.

  Moreover, since the air which flowed in in the reflector 15 by the ventilation port 41 directly cools the light source device 10, the heat which generate | occur | produced in the light source device 10 with the heat sink 20 can be reduced efficiently.

  Next, the operation of the vehicular lamp 100 of this embodiment will be described.

The following processing is performed by the control device 60 configured by a control circuit such as an ECU.
The control device 60 drives the light source device 10 via the light source control circuit board 61. Thereby, the light source device 10 emits white light WL from the light emitting unit 9. The light WL emitted from the light emitting unit 9 is reflected by the reflector 15 and irradiated forward, thereby forming a basic light distribution pattern (high beam light distribution pattern) on the virtual vertical screen.

  At this time, the temperature of the light source device 10 rises as the semiconductor laser 10a generates heat. The heat of the light source device 10 is transmitted directly to the heat sink 20 (first member 21) or indirectly through the mounting plate 11. The heat transferred to the first member 21 is transferred to the second member 25. In this way, the heat of the light source device 10 spreads over the entire heat sink 20. The first member 21 releases heat through the plurality of fins 24, and the second member 25 releases heat through the plurality of fins 34.

  In the present embodiment, the control device 60 drives the blower fan 30 in accordance with the driving of the light source device 10. The air blown by the blower fan 30 flows through the flow path R formed in the duct 40 and below the light source device 10. Since the flow path R of the present embodiment is partitioned by the plurality of fins 24, the air flowing in the flow path R makes good contact with the fins 24. Therefore, the first member 21 has excellent heat dissipation performance. That is, the first member 21 can efficiently release heat.

  Of the heat sink 20, the vicinity of the light source device 10 is very hot. In the present embodiment, since the cross-sectional area of the flow path R becomes smaller toward the light source device 10 side, the flow velocity of the air flowing through the flow path R becomes faster toward the light source device 10 side. Therefore, air having a high flow velocity is supplied between the plurality of fins 34 disposed below (in the vicinity of) the light source device 10 that is the outlet of the duct 40. Therefore, the heat of the second member 25 is efficiently released through the plurality of fins 34. Since the second member 25 is thermally connected to the first member 21 that holds the light source device 10, the second member 25 efficiently releases the heat generated in the light source device 10. The heat generated in the light source device 10 is efficiently radiated by the heat sink 20. Therefore, the light source device 10 can be efficiently cooled.

  In this embodiment, a part of the air flowing in the duct 40 flows into the reflector 15 through the ventilation port 41 and directly cools the light source device 10, so that the heat of the light source device 10 can be efficiently reduced. .

  A part of the light (fluorescence YL) emitted from the light emitting unit 9 of the light source device 10 is detected by the light detecting unit 52. The light detection unit 52 transmits the detection result to the control device 60. The control device 60 determines the light irradiation state in the light source device 10 based on the result transmitted from the light detection unit 52.

  For example, when the detection result by the light detection unit 52 is normal (that is, when fluorescence YL is detected), the control device 60 determines that the light source device 10 is normal and continuously emits the laser light L. Thus, the drive of the semiconductor laser 10a is controlled.

  By the way, while the semiconductor laser 10a emits the laser beam L, the wavelength conversion member 10b may be dropped (or lost). Hereinafter, an operation example (control example of the semiconductor laser 10a) of the vehicular lamp 100 when the wavelength conversion member 10b is dropped (or lost) while the semiconductor laser 10a is emitting the laser light L will be described.

  When the wavelength conversion member 10b is dropped (or missing), the fluorescence YL does not enter the light detection unit 52. When the light detection unit 52 does not detect the fluorescence YL, the control device 60 determines that the wavelength conversion member 10b has been dropped (or lost) or the light detection unit 52 has failed, and does not emit the laser light L. 10a is controlled.

  Thereby, when the wavelength conversion member 10b is dropped (or lost), the laser light L emitted from the light source device 10 in a state where the wavelength conversion member 10b is dropped (or lost) is reflected by the reflector 15 and emitted to the outside. Can be suppressed. Therefore, it is possible to prevent the laser light from directly entering the human eye located in front of the vehicle.

  Further, when the wavelength conversion member 10b is dropped (or missing), the laser light L emitted from the light source device 10 in a state where the wavelength conversion member 10b is dropped (or missing) is, as shown in FIG. It is incident on the opening 71 formed in. The laser beam L incident on the opening 71 is reflected toward the vehicle rear side by the inclined surface 80. The laser beam L reflected by the inclined surface 80 is shielded by the shielding member 35. Therefore, even if it takes time until the semiconductor laser 10a is controlled so as not to emit the laser light L, the laser light L emitted from the light source device 10 in a state where the wavelength conversion member 10b is dropped (or lost). Can be prevented from being reflected by the first reflecting surface 72a and the second reflecting surface 73a of the reflector 15 and being irradiated to the front side of the vehicle.

  As described above, according to the vehicular lamp 100 of the present embodiment, it is possible to reduce deterioration in appearance due to the opening 71 of the reflector 15 being visually recognized from the front side of the vehicle.

Further, according to the vehicular lamp 100 of the present embodiment, air can be supplied at a high wind speed below (in the vicinity of) the light source device 10 through the duct 40. Therefore, the efficiency of the light source device 10 that becomes high temperature by providing the semiconductor laser 10a is improved. It can cool well.
In the duct 40, since the cross-sectional area of the flow path R gradually changes, air flows smoothly in the flow path R, so that the light source device 10 can be efficiently cooled.
The duct 40 of the present embodiment can blow air to the upper side of the light source device 10 through the ventilation port 41 in addition to the lower side of the light source device 10. Thereby, the light source device 10 can be directly cooled. Therefore, in this embodiment, since the cooling by air blowing is performed in addition to the cooling by the heat sink 20, the light source device 10 can be efficiently cooled.

  Further, in the present embodiment, since almost all of the wind generated by the blower fan 30 is supplied into the duct 40, the wind generated by the blower fan 30 can be used efficiently.

  Further, according to the vehicular lamp 100 of the present embodiment, since the blower fan 30 is disposed on the vehicle rear side of the light source device 10, compared to the case where the blower fan 30 is disposed on the lower side with respect to the light source device 10. The vertical size of the device configuration can be reduced.

  Moreover, in this embodiment, since a part of heat sink 20 serves as the duct 40, cost reduction and size reduction can be achieved by reducing a number of parts. Since the heat sink 20 of the present embodiment is configured using a plurality of members (the first member 21 and the second member 25), it is possible to cope with a complicated shape that also serves as the duct 40.

  Moreover, since the heat sink 20 of this embodiment is provided with the several fins 24 and 29a, the heat | fever of the light source device 10 can be discharge | released efficiently by the ventilation from the ventilation fan 30. FIG.

  Further, in the present embodiment, light (light that cannot be used as a basic light distribution pattern) emitted obliquely upward from the light source device 10 from the light source device 10 is incident on the photodiode (light detection device 50). Therefore, the light use efficiency of the light source device 10 can be increased.

  Further, in this embodiment, since the semiconductor laser 10a is controlled so as not to emit laser light based on the detection result of the light detection device 50, when the wavelength conversion member 10b is dropped (or missing), the wavelength conversion member 10b is It is possible to suppress the laser light emitted from the light source device 10 in the dropped (or missing) state from being reflected by the reflector 15 and being emitted to the outside.

  According to this embodiment, even if it takes time until the semiconductor laser 10a is controlled so as not to emit laser light, the wavelength conversion member 10b is emitted from the light source device 10 in a state where the wavelength conversion member 10b is dropped (or missing). Since the laser beam passing through the opening 71 is reflected, it can be suppressed that the laser beam is reflected and emitted to the outside.

  In the present embodiment, light other than the light emitted from the light source device 10 by the cover member 53 (for example, disturbance light such as sunlight or light from an oncoming vehicle) is shielded, so that the photodiode (light detection unit) 52) can be improved.

  Moreover, since the light from the light source device 10 is directly detected by the light detection unit 52 disposed on the vehicle rear side of the reflector 15, the reflector 15 is larger than the structure in which the photodiode is disposed on the vehicle front side of the reflector 15. Can be suppressed. Therefore, the vehicle lamp 100 provided with the reflector 15 can be reduced in size.

  In the present embodiment, the light detection unit 52 uses light (light with a light emission angle θ of 70 to 85 °) that cannot be used as a basic light distribution pattern even when reflected by the reflector 15 for detection. Therefore, light can be used effectively without affecting the light quantity of the basic light distribution pattern.

  In the present embodiment, the light detection unit 52 is covered with the cover member 53, and detection is performed by the light detection unit 52 through the opening 53a provided in the cover member 53. Therefore, the S / N ratio of the light detection unit 52 is improved. be able to.

  In addition, this invention is not necessarily limited to the thing of the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.

  FIG. 11 is a diagram illustrating a configuration of a main part of a reflector 115 according to a modification. FIG. 11A is a perspective view of the reflector 115 viewed from the inner surface side, and FIG. 11B is a cross-sectional view of the reflector 115. FIG. 11C is a front view of the reflector 115.

  As shown in FIG. 11A, the reflector 115 according to the modification includes a main body portion 116 and an opening 117 formed in the main body portion 116. The main body 116 has a reflecting surface 118 on the inner surface side. The reflective surface 118 includes a first reflective surface 118a and a second reflective surface 118b.

The first reflecting surface 118 a is formed in a portion of the inner surface of the main body 116 excluding the convex portion 119 and the opening 117.
The second reflecting surface 118 b is provided on the convex portion 119 that protrudes toward the inner surface side of the main body portion 116. An end surface on the vehicle rear side of the convex portion 119 constitutes an opening end 117 b on the vehicle front side of the opening 117. That is, the width of the convex portion 119 in the vehicle left-right direction (Y-axis direction) matches the width of the opening 117 in the vehicle left-right direction. The planar shape of the opening 117 is a long shape having long sides in the left-right direction of the vehicle, as in the above embodiment.

  In the present embodiment, the first reflecting surface 118 a includes a paraboloid (first paraboloid) 120 a that focuses on the light emitting unit 9 of the light source device 10. The second reflecting surface 118b includes a parabolic surface (second parabolic surface) 120b that focuses on the light emitting portion 9 of the light source device 10. That is, the paraboloids 120a and 120b constituting the first reflecting surface 118a and the second reflecting surface 118b have a common focal point.

The convex portion 119 may be formed integrally with the main body portion 116, or may be formed separately from the main body portion 116. When the convex part 119 and the main body part 116 are integrally formed, the first reflecting part 72 and the second reflecting part 73 can be handled as one member, and there is no positional deviation. Become.
On the other hand, when the convex part 119 and the main body part 116 are formed separately, the reflector 115 having a complicated inner surface shape can be formed by attaching the convex part 119 to the inner surface of the main body part 116 with an adhesive or the like. .

  Hereinafter, in FIG. 11B, an end of the first reflecting surface 118a on the front side of the vehicle (hereinafter referred to as an upper end) is denoted by reference numeral 175, and an end of the first reflecting surface 118a on the rear side of the vehicle (hereinafter referred to as “upper end”). The lower end of the second reflecting surface 118b (referred to as the upper end) is indicated by 177 and the end of the second reflecting surface 118b on the rear side of the vehicle (referred to as the lower end). Hereinafter, it is referred to as a lower end.

As shown in FIG. 11B, the second reflecting surface 118b is located on the vehicle front side of the first reflecting surface 118a. Therefore, the coefficient c of the quadratic term of the equation (for example, cx ² ) that defines the paraboloid 120b that constitutes the second reflecting surface 118b is the equation that defines the paraboloid 120a that constitutes the first reflecting surface 118a. It becomes larger than the coefficient d of the quadratic term of (for example, dx ² ). That is, the second reflecting surface 118b has a shape that is curved (curved) to a greater extent than the first reflecting surface 118a.

Thus, according to this modification, the convex portion 119 having the second reflecting surface 118b having a large curve is disposed at the opening end 117b on the vehicle front side of the opening 117, and the opening end on the vehicle rear side of the opening 117 is provided. A first reflecting surface 118a (main body portion 116) having a small curve is arranged at 117a.
Accordingly, the lower end 178 of the second reflecting surface 118b is positioned lower than the upper end 175 of the first reflecting surface 118a in the vehicle vertical direction (Z-axis direction). Therefore, as shown in FIG. 11 (c), the opening 171 can be prevented from being visually recognized from the front side of the vehicle. Can be reduced.

  Moreover, in the said embodiment, although the case where the 1st reflective surface 72a of the 1st reflective part 72 was comprised only from the paraboloid 72a1 was mentioned as an example, this invention is not limited to this. For example, since the first reflecting surface 72a has a short distance to the light emitting unit 9, the projected image irradiated to the front of the vehicle becomes large. Then, the amount of light applied to the road surface increases, and the illuminance distribution becomes non-uniform. On the other hand, the lower end portion of the first reflecting surface 72a may be formed by a reflecting surface different from the parabolic surface, and the light reflected by the reflecting surface may be emitted upward to make the illuminance distribution uniform. . In other words, the first reflecting surface 72a may have a configuration in which a part (lower end) includes a surface shape different from the parabolic surface.

Moreover, although the said embodiment demonstrated the example of arrangement | positioning of the opening part 71 when the laser beam L inject | emitted from the light source device 10 spreads in the vehicle left-right direction, this invention is not limited to this. FIG. 12 is a plan configuration diagram of a reflector 215 according to a modification.
In the reflector 215 shown in FIG. 12, the light source device 10 is installed so that the spreading direction of the laser light L is inclined with respect to the vehicle left-right direction. In this case, the planar shape of the opening 171 is a long shape having a long side in a direction corresponding to the spreading direction of the laser light L (a direction inclined with respect to the vehicle left-right direction).

  Moreover, although the case where the light source device 10 is disposed on the lower side in the vehicle vertical direction with respect to the reflector 15 has been described as an example in the above embodiment, the light source device 10 is disposed on the upper side in the vehicle vertical direction with respect to the reflector 15. May be. Alternatively, the light source device 10 may be disposed in any of the left and right directions of the vehicle with respect to the reflector 15.

  DESCRIPTION OF SYMBOLS 9 ... Light emission part, 10 ... Light source device, 10a ... Semiconductor laser, 10b ... Wavelength conversion member, 15 ... Reflector (reflection member), 35 ... Shield member, 71 ... Opening part, 71a, 171a ... Opening end, 71b, 171b ... Open end, 72 ... First reflection part, 72a ... First reflection surface, 72a1 ... Parabolic surface (first paraboloid), 73 ... Second reflection part, 73a ... Second reflection surface, 73a1 ... Parabolic surface (2nd paraboloid), 80 ... inclined surface, 100 ... vehicle lamp, AX1 ... optical axis.

Claims (6)

A light source device for emitting light;
A reflective member that reflects the light emitted from the light source device toward the vehicle front side,
The reflective member is
An opening,
A first reflecting portion that is provided at least at an opening end of the opening on the vehicle rear side, and includes a first reflecting surface having a first paraboloid that focuses on the light emitting portion of the light source device as a reflecting surface;
A vehicular lamp, comprising: a second reflecting portion that is provided at an opening end of the opening on the front side of the vehicle and includes a second reflecting surface that has a second paraboloid that focuses on the light emitting portion as a reflecting surface. The vehicular lamp according to claim 1, wherein a coefficient of a quadratic term of an expression defining the second paraboloid is larger than a coefficient of a quadratic term of the expression defining the first paraboloid. The second reflecting portion is provided with an inclined surface inclined toward the vehicle rear side at an end portion on the vehicle rear side,
The vehicular lamp according to claim 1, wherein the inclined surface is located on an optical axis of the light source device. The vehicular lamp according to any one of claims 1 to 3, wherein the first reflecting portion and the second reflecting portion are integrally formed. The shielding member which is arrange | positioned on the opposite side to the said light source device of the said reflection member, and further shields the light from the said light source device inject | emitted through the said opening while covering the said opening part. The vehicle lamp according to one item. The light source device includes a semiconductor laser that emits laser light having anisotropy in a spread angle, and a wavelength conversion member that converts the wavelength of at least a part of the laser light,
The vehicular lamp according to any one of claims 1 to 5, wherein the planar shape of the opening is a long shape having a long side in a direction in which a divergence angle of the laser light is relatively large.

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