JP2020091965A - Vehicle lighting - Google Patents

Abstract

To easily form a light distribution pattern having a spread.SOLUTION: In a lighting appliance for a vehicle including a light source and a compound optical lens, the compound optical lens comprises: a light incident face for making light incident therein; a light emitting face for radiating the light which is made incident from the light incident face to a front side; a shade part formed between the light incident face and the light emitting face; a first reflector face formed at an upper side of the light incident face side, and reflecting light for forming a first light distribution pattern toward the light emitting face; and a second reflector face formed at a lower side of the light incident faced side, and reflecting light for forming a light- condensing light distribution pattern toward the light emitting face. In the light incident face, a lower-side light incident face located at a lower part of the light source is formed closer to the light source than an upper-side light incident face located at an upper part of the light source at a vertical cross section which passes an optical axis.SELECTED DRAWING: Figure 7

Description

The present disclosure relates to a vehicle lighting device.

2. Description of the Related Art A vehicular lamp including a composite optical lens in which an entrance surface, an exit surface, and a shade portion are integrally molded is known.

French Patent Publication No. 3010772

However, in the above-described conventional technique, the compound optical lens is configured to collect the light incident from the incident surface at the focal point of the exit surface, and thus it is difficult to form a light distribution pattern having a spread or the like.

Therefore, in one aspect, the present invention aims to facilitate formation of a light distribution pattern having a spread.

In one aspect, a vehicular lamp including a light source and a compound optical lens,
The compound optical lens,
An incident surface on which light is incident,
An emission surface that irradiates the light incident from the incident surface to the front side,
A shade portion formed between the entrance surface and the exit surface,
A first reflector surface which is formed on the upper side of the incident surface side and which reflects the light forming the first light distribution pattern toward the emission surface;
A second reflector surface that is formed on the lower side of the incident surface side and that reflects the light forming the condensed light distribution pattern toward the emission surface,
The incident surface is formed so that a lower incident surface located below the light source is closer to the light source than an upper incident surface located above the light source in a vertical cross section passing through the optical axis. A vehicle lamp is provided.

According to the present invention, in one aspect, it is possible to easily form a light distribution pattern having a spread.

It is a top view of the vehicle provided with the vehicle lamp of this embodiment. It is an exploded perspective view of the lamp unit of this embodiment. It is sectional drawing of the compound optical lens of this embodiment. It is a perspective view of the compound optical lens of the present embodiment so that the exit surface side can be seen. It is a perspective view of the compound optical lens of the present embodiment in which the incident surface side is visible. It is sectional drawing of the compound optical lens by a modification. It is sectional drawing of the compound optical lens for demonstrating the optical path of the light which forms a condensing light distribution pattern. It is an enlarged view of the Q1 part of FIG. It is explanatory drawing (cross-sectional view) which shows the case of a comparative example.

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 or reference numerals 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.
Needless to say, "upper" and "lower" are also "upper" and "lower" in the vertical direction, and "left" and "right" are also "left" and "right" in the horizontal direction.

FIG. 1 is a plan view of a vehicle 102 including the vehicle lamp of the present embodiment.
As shown in FIG. 1, the vehicular lamp of the present embodiment is a vehicular headlamp (101L, 101R) provided on each of the front side and the left side of the vehicle 102, and is hereinafter simply referred to as a vehicular lamp. To do.

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. The lamp unit 1 (see FIG. 2) and the like are arranged in the lamp chamber.

FIG. 2 is an exploded perspective view of the lamp unit 1 of this embodiment.
As shown in FIG. 2, the lamp unit 1 includes a heat sink 10, a light source device 20 attached to the heat sink 10, an optical control member 30 disposed on the light source device 20, and a cover that covers a part of the optical control member 30. 40 is provided.

(Heat sink 10)
The heat sink 10 is provided with a base portion 11 on which the light source device 20 is arranged, a plurality of heat radiation fins 12 provided on the rear side of the base portion 11 and arranged in the vehicle width direction, and one side of the base portion 11 in the vertical direction (in FIG. 2). And a pair of positioning pins 11A that are provided on the lower side and that are spaced apart in the vehicle width direction and that project toward the front side.

A pair of screw screw holes 11B are formed in the base portion 11 on the center side in the vehicle width direction and at positions separated in the vertical direction. The pair of screw screw holes 11B will be described later. A pair of screws N are screwed and fixed so as to fix the light source device 20, the optical control member 30, and the cover 40 together.

The radiating fins 12 extend to the other vertical side (upper side in FIG. 2) than the base portion 11 and extend in the vertical direction from the base portion 11 (upper side portion in FIG. 2 ). However, it is shaped like a notch from the base portion 11 side to the rear side so that a connector connecting portion 23B of the light source device 20 described later can be accommodated.

In the present embodiment, the heat sink 10 is the aluminum die-cast heat sink 10. However, the heat sink 10 is not limited to this, and may be made of metal or resin having high thermal conductivity.

(Light source device 20)
The light source device 20 includes a heat transfer member 21, a light source 22 arranged on the heat transfer member 21, an opening 23A arranged on the heat transfer member 21, and provided at a position corresponding to the light source 22, and an external connector. And a connector 23 having a connector connector 23B to be connected.

The connector connecting portion 23B is located on the other side (upper side in FIG. 2) in the vertical direction than the heat transfer member 21, and is provided so that a part of the heat transfer member 21 protrudes rearward. As described above, this protruding portion is located in a portion having a shape cut out on the rear side of the heat radiation fin 12.

In the present embodiment, the heat transfer member 21 uses a plate material made of aluminum having an outer shape larger than that of the light source 22, but the material is not limited to aluminum, and a metal or resin other than aluminum having high thermal conductivity is used. And so on.
Then, the heat transfer member 21 quickly diffuses the heat generated by the light source 22 to a wide range and efficiently transfers the heat to the heat sink 10 to enhance the cooling efficiency of the light source 22.

The light source 22 includes a substrate 22A having a light emitting region 22B that transmits light, and a light emitting chip (not shown) that is disposed on the back side of the substrate 22A and emits light for causing the light emitting region 22B to emit light. In the embodiment, the LD light source (laser light source) uses the LD chip (laser diode chip) as the light emitting chip, but it may be an LED light source (light emitting diode light source) using the LED chip as the light emitting chip.
The light source 22 (light emitting chip) of the present embodiment has a Lambertian distribution having a plane light emitting portion or a distribution close to this.

However, it is preferable to use the LD light source as the light source 22, because the LD light source is more easily downsized than the LED light source.

The connecting portion 23 is, for example, insert-molded using an electrically insulating resin having excellent heat resistance so that the electrical wiring (not shown) for electrically connecting the light source 22 and the external connector is housed inside. The electric wiring (not shown) has one end side led out to the opening 23A to be electrically connected to the light source 22, and the other end of the electric wiring (not shown) is a connector. It is led out into the connection portion 23B, and is electrically connected to the external connector.

The light source device 20 includes a pair of positioning holes 24A through which the pair of positioning pins 11A provided in the base portion 11 pass, and a pair of screw holes 11B provided at the base portion 11 at a position corresponding to the pair of positioning holes 24A. And a screw hole 24B, and can be fixed to the heat sink 10 by a screw N in a state of being positioned by the positioning pin 11A.

(Optical control member 30)
The optical control member 30 arranges the compound optical lens 31 in the light source device 20 to irradiate the light from the light source 22 to the front side, and a fixing part for fixing the compound optical lens 31 together with the light source device 20 to the heat sink 10. 32 is a member in which the composite optical lens 31 and the fixing portion 32 are integrally molded of a transparent resin (for example, an acrylic resin or a polycarbonate resin).

The fixed portion 32 includes a pair of leg portions 32A extending rearward from the left and right side surfaces that do not affect the optical control of the compound optical lens 31 (the left and right side surfaces on the front side of the top line 31CA of the shade portion 31C described later). , And a base portion 32B for fixing which is provided so as to be connected to the pair of leg portions 32A.

Then, the base portion 32B has a pair of positioning holes 32BA through which the pair of positioning pins 11A provided in the base portion 11 pass, and a pair of screws provided at positions corresponding to the screw screw holes 11B provided in the base portion 11. Holes 32BB, and is fixed to the heat sink 10 together with the light source device 20 by the screw N in a state of being positioned by the positioning pin 11A.

The base portion 32B of the optical control member 30 is disposed on the connection portion 23 of the light source device 20 to avoid contact with the heat transfer member 21 of the light source device 20, and the connection portion 23 is the optical control member. Acrylic resin having low heat resistance (for example, heat resistant temperature of about 100° C.) is used for the optical control member 30 by performing a function as a heat insulator that insulates heat provided between the heat transfer member 30 and the heat transfer member 21. Even if there is no problem.

(Cover 40)
The cover 40 has an opening that does not cover the light exit surface 31A of the compound optical lens 31 that emits light and the light incident surface 31B that allows light to enter (see FIGS. 3 and 5), and covers the side surface of the compound optical lens 31. It is provided on the cylindrical cover portion 41 and the rear end side of the cover portion 41 so as to project from the cover portion 41 to the outside, and is fixed to the heat sink 10 together with the optical control member 30 and the light source device 20. And a flange portion 42 for.

In addition, the cover portion 41 has a pair of portions which are notched from the rear end side toward the front end side and are separated from each other in the vehicle width direction so that the pair of leg portions 32A of the fixing portion 32 of the compound optical lens 31 can be inserted. The notch portion 41A is provided.

Further, the flange portion 42 has one side in the vertical direction (lower side in FIG. 2) based on the position of the pair of cutout portions 41A so that the leg portion 32A can be inserted into the pair of cutout portions 41A. ) And the other side in the vertical direction (upper side in FIG. 2), respectively.

The flange portion 42 is formed in the flange portion 42 on one side in the vertical direction (lower side in FIG. 2), and has a pair of positioning holes 42A through which the pair of positioning pins 11A provided in the base portion 11 pass and a vertical direction. One is formed on each of the flange portions 42 on one side (the lower side in FIG. 2) and the other side (the upper side in FIG. 2) in the vertical direction, and corresponds to the screw screw holes 11B provided on the base portion 11. It is provided with a pair of screw holes 42B provided at the position, and is fixed to the heat sink 10 together with the optical control member 30 and the light source device 20 by the screw N in a state of being positioned by the positioning pin 11A.

The cover 40 is for suppressing light from leaking from a position other than the emission surface 31A of the compound optical lens 31, and in the present embodiment, is made of an opaque resin that does not transmit light. There is.

However, the cover 40 may be formed of a transparent resin that allows light to pass therethrough, and may have a colored layer formed on the surface thereof to suppress light transmission.
Further, the cover 40 may be omitted, and the same function as that of the cover 40 may be provided by performing aluminum vapor deposition or the like on a portion of the compound optical lens 31 excluding the entrance surface 31B and the exit surface 31A.

Next, the compound optical lens 31 will be described in detail with reference to FIGS. 3 to 9. Here, first, the overall characteristics of the compound optical lens 31 will be described with reference to FIGS. 3 to 5, and then, a part of the compound optical lens 31 (below the incident surface 31B will be described with reference to FIGS. 7 to 9. The characteristics of the side region) will be described in more detail.

FIG. 3 is a cross-sectional view of the compound optical lens 31 of the present embodiment, and is a cross-sectional view taken along the lens optical axis Z and seen from the side surface in the vertical direction. In addition, in FIG. 3, the light emitting region 22</b>B of the light source 22 that is schematically illustrated is also illustrated. 4 is a perspective view of the compound optical lens 31 of the present embodiment in which the exit surface 31A side is visible, and FIG. 5 is a perspective view of the compound optical lens 31 of this embodiment in which the incident surface 31B side is visible. is there.

As shown in FIG. 3, the compound optical lens 31 of the present embodiment includes an incident surface 31B on which the light from the light source 22 is incident, an exit surface 31A that irradiates the light incident from the incident surface 31B to the front side, and an incident surface. A shade portion 31C formed between 31B and the emission surface 31A is a lens integrally formed.

The shade portion 31C is formed so as to form a substantially triangular recess inside the composite optical lens 31 from the vertically lower side between the entrance surface 31B and the exit surface 31A of the composite optical lens 31. The position of the apex of the triangular recess is the top line 31CA that matches the shape of the cut-off line.

Further, the compound optical lens 31 is formed on the upper side (vertical direction upper side) on the incident surface 31B side of the top line 31CA of the shade portion 31C, and forms the first light distribution pattern of the low beam light distribution pattern incident from the incident surface 31B. A free-form semi-dome-shaped first reflector surface 31D that reflects the light L1 toward the exit surface 31A, and a lower side (vertical direction lower side) of the entrance surface 31B side from the top line 31CA, and from the entrance surface 31B. The second reflector surface 31E (total reflection surface) is a semi-dome-shaped free-form surface that reflects the incident light L2 that forms the focused light distribution pattern of the low-beam light distribution pattern toward the exit surface 31A.

In addition, in the present embodiment, the first light distribution pattern is a diffused light distribution pattern of the low beam light distribution pattern, and thus may be hereinafter referred to as a first diffused light distribution pattern.

Further, the width in the vehicle width direction of the position where the first reflector surface 31D and the second reflector surface 31E are adjacent to each other is larger in the first reflector surface 31D, and the first diffused light distribution pattern of the low beam light distribution pattern is excellent. To be able to form.

As described above, in the present embodiment, the single diffused optical lens 31 can form the first diffused light distribution pattern and the condensed light distribution pattern of the low beam light distribution pattern, so that the lamp unit 1 for forming the low beam light distribution pattern is provided. It is not necessary to provide many lamps, and the vehicular lamp can be downsized.

On the other hand, in the present embodiment, the incident surface 31B has a concave shape in which the entire shape is concave inside the compound optical lens 31, and the light L3 forming the second light distribution pattern of the low beam light distribution pattern is made incident on the center side. It has a convex surface 31BA protruding to the outside of the compound optical lens 31.

In the present embodiment, the second light distribution pattern is a medium light distribution pattern of the low beam light distribution pattern smaller than the first light distribution pattern of the low beam light distribution pattern. It may be described as a light pattern.

As shown in FIG. 5, the convex surface 31BA has a substantially rectangular outer shape (square shape), and as shown in FIG. 3, is formed so that the front focus is located at the top line 31CA or near the top line 31CA. ing.

Then, since the light source 22 is located on the rear side of the convex surface 31BA so that the center of the convex surface 31BA and the light emission center of the light source 22 are substantially coincident with each other when viewed in the vehicle width direction and the vertical direction, the light incident from the convex surface 31BA is largely refracted. In this way, the light is gently condensed toward the top line 31CA, and further spreads gently from the front focus toward the emission surface 31A to form a good medium diffusion light distribution pattern.
More precisely, the convex surface 31BA condenses light in the vertical direction, but diffuses it so as to spread the light in the horizontal direction.

As described above, in the present embodiment, the second diffused light distribution pattern, which is a medium diffused light distribution pattern (medium diffused light distribution pattern), which is multiplexed with the condensing light distribution pattern and the first diffused light distribution pattern, is also formed. Therefore, the luminous intensity distribution as the low-beam light distribution pattern can be improved.

The incident surface 31B outside the convex surface 31BA has a shape that spreads to the rear side, and the entire shape of the incident surface 31B is a concave shape that is recessed inside the compound optical lens 31, so that light is emitted toward the front side. In consideration of the spread of the light from the light source 22, the light can be made incident into the complex optical lens 31 without waste.
The concave rear focal point that is recessed inward of the compound optical lens 31 having the entire shape of the incident surface 31B substantially coincides with the rear focal point of the first reflector surface 31D, and the rear focal points are the light emission center of the light source 22. Is almost the same as
As described above, according to this embodiment, the light source 22 is arranged so as to emit light to the front side, and the compound optical lens 31 utilizes the spread of the light, and the largest low beam distribution pattern of the light spread to the upper side. Light distribution pattern (first diffused light distribution pattern) is formed, the light spreading downward is used to form a focused light distribution pattern of the low beam light distribution pattern, and the light on the center side is diffused in the middle of the low beam light distribution pattern. Since the light pattern (second diffuse light distribution pattern) is formed, a good low-beam light distribution pattern can be formed without using a large number of lamp units 1, and the vehicle lamp can be downsized. ..
It should be noted that in the vicinity of the upper end of the cutoff line, the spectrum of the light distribution pattern having a slightly yellowish color and the spectrum of the bluish color of the first diffused light distribution pattern are multiplexed so that the spectral color can be relaxed.

By the way, in the present embodiment, since the shade portion 31C is formed so as to form a substantially triangular recess inside the complex optical lens 31, the shade portion 31C is inclined rearward from the top line 31CA. The rear side inclined surface 31CB is provided, and a part of the light reflected by the first reflector surface 31D, a part of the light reflected by the second reflector surface 31E, and the direct light from the light source 22 are included. When a part is reflected by the rear side inclined surface 31CB, a part of the reflected light is reflected by the surface on the front side above the apex line 31CA and is emitted from the emission surface 31A to the front side.

Then, such light is light that is not scheduled to be subjected to light distribution control on the emission surface 31A, and may be harmful light that is emitted to the interior of the lamp or the vicinity of the vehicle.

Therefore, in the present embodiment, as shown in FIG. 3, the compound optical lens 31 is formed on the exit surface 31A side with respect to the top line 31CA of the shade portion 31C, and the light distribution control is performed on the exit surface 31A toward the exit surface 31A. The light-scattering portion 31F is formed in a portion that reflects reflected light that is not scheduled to be performed.

Specifically, the light scattering portion 31F is formed at the site of the compound optical lens 31 to which the light reflected by the rearward inclined surface 31CB is directly irradiated, and as a result, as shown in FIG. The light is scattered, and most of the light becomes the light L4 emitted from the light scattering portion 31F and is shielded by the cover 40 (see FIG. 2) so as not to go outside.

On the other hand, a part of the light scattered by the light scattering portion 31F becomes the light L5 emitted from the exit surface 31A to the front side, but the light amount of the light L5 is significantly reduced, and therefore the light interior of the lamp room or the vicinity of the vehicle. It is not harmful even if it is irradiated to the.

The light scattering portion 31F has fine irregularities (for example, prisms) formed on the surface of the compound optical lens 31, but the light scattering portion 31F is not limited to this as long as it can efficiently scatter light.
Further, a light scattering portion may be provided also on the rear side inclined surface 31CB, and by doing so, it is possible to further reduce the amount of light that may be emitted to the interior of the lamp or the vicinity of the vehicle.
In the modification, as shown in FIG. 6, the light scattering section 31F may be omitted.

By the way, in the present embodiment, the case where the complex optical lens 31 mainly controls the formation of the low beam distribution pattern has been described, but it is assumed that not only the low beam distribution pattern but also the overhead distribution is formed. The configuration for forming the overhead light distribution will be described below.

As described above, since the shade portion 31C is formed so as to form a substantially triangular recess inside the compound optical lens 31, the shade portion 31C is inclined forward from the top line 31CA. It has a front side inclined surface 31CC.

Since the front side inclined surface 31CC can be used to reflect light obliquely upward, in the present embodiment, the composite optical lens 31 receives at least one portion of the direct light from the light source 22 on the front side inclined surface 31CC. The light L6 reflected by the reflection surface 31G and further reflected by the front side inclined surface 31CC is emitted from the emission surface 31A as overhead light distribution so as to form the reflection surface 31G that reflects toward the portion. ing.

Specifically, as shown in FIG. 3 and FIG. 4, a part of the direct light from the light source 22 is located on the front side above the position between the first reflector surface 31D and the light scattering portion 31F of the compound optical lens 31. A reflecting surface 31G that reflects toward at least a part of the inclined surface 31CC is formed.

In the present embodiment, as shown in FIGS. 3 and 5, the angle of reflection toward the emission surface 31A side is adjusted in the portion of the front side inclined surface 31CC where the light reflected by the reflection surface 31G is irradiated. A reflection angle adjusting unit 31CCA is provided.

However, it is not an indispensable requirement that the front side inclined surface 31CC is provided with the reflection angle adjusting portion 31CCA, and the light reflected by the reflection surface 31G is incident on the emission surface 31A at a reflection angle suitable for overhead light distribution. The entire inclined state of the front side inclined surface 31CC may be set so as to be reflected toward.

Further, since the first reflector surface 31D, the second reflector surface 31E, the front side inclined surface 31CC (only the reflection angle adjusting portion 31CCA may be used), and the reflection surface 31G are required to have a function of reflecting light, reflection of light is required. White or silver coloring may be applied to increase the rate.

In addition, according to the present embodiment, it is possible to suppress harmful light emitted to the interior of the lamp or the vicinity of the vehicle that may occur due to the use of the composite optical lens 31, and to form a low beam light distribution pattern. It becomes a good lamp unit 1 that can also form overhead light distribution with the lens 31.

Next, with reference to FIGS. 7 to 9, the characteristics of a part of the compound optical lens 31 (a region on the lower side of the incident surface 31B) will be described in more detail.
FIG. 7 is a cross-sectional view of the compound optical lens 31, and is a cross-sectional view as seen from a side surface cut in the vertical direction along the lens optical axis Z. FIG. 7 is the same cross-sectional view as FIG. 3, but is an explanatory diagram showing in detail the optical path of the light L2 (see FIG. 3) forming the condensing light distribution pattern of the low beam light distribution pattern. FIG. 8 is an enlarged view of the Q1 portion of FIG. FIG. 9 is an explanatory diagram (cross-sectional view) showing the case of the comparative example. 7 to 9, the position of the light source 22 (the position of the light emission center) is indicated by P1.

The area on the lower side of the incident surface 31B is an area on which the light mainly reflected by the second reflector surface 31E is incident, as described above. As described above, the light reflected by the second reflector surface 31E includes the light L4 emitted from the light scattering section 31F and the light L2 forming the condensing light distribution pattern of the low beam light distribution pattern. As described above, the light scattering portion 31F may be omitted, and in such a modified example (see FIG. 6), the light L4 corresponds to the portion corresponding to the light scattering portion 31F (however, the light scattering portion 31F and Is a light that reaches a portion where fine irregularities are not formed on the surface).

As shown in FIG. 7, in the second reflector surface 31E, the region 31E-1 where the light L2 is reflected is closer to the light source 22 in the direction of the lens optical axis Z than the region 31E-2 where the light L4 is reflected. Located on the side.

In the present embodiment, a region below the light source 22 (or the light emitting region 22B) in the incident surface 31B (hereinafter, referred to as “lower incident surface 311”) is a lower side as shown in FIGS. 7 and 8. It is formed so that the light from the light emission center incident on the incident surface 311 is refracted. That is, the light L2 is refracted by the incident surface 31B and then reflected by the second reflector surface 31E.

Specifically, as shown in FIG. 8, when the light refracted by the lower incident surface 311 is traced in the direction opposite to its traveling direction, the lower incident surface 311 emits each light ray related to the light from the light source 22. Is also formed so as to gather at one point F1 on the upper side (hereinafter, referred to as "virtual focus F1"). That is, in FIG. 8, when the light refracted at the lower incident surface 311 is traced in the direction opposite to its traveling direction, each ray of the light is shown by a dotted line 700. These dotted lines 700 intersect at the virtual focal point F1.

Further, in the present embodiment, the incident surface 31B is formed such that the virtual focus F1 is located above the light source 22 (see the position P1), as shown in FIG. Thereby, it becomes easy to reflect the light refracted by the lower incident surface 311 to the region of the second reflector surface 31E on the side closer to the light source 22 in the direction of the lens optical axis Z. That is, the region on the second reflector surface 31E closer to the light source 22 in the direction of the lens optical axis Z can be efficiently used as the region 31E-1 where the light L2 is reflected.

The position of the virtual focus F1 is determined according to the lower incident surface 311. When the lower incident surface 311 is formed so that the virtual focus F1 is located above the light source (see the position P1), the lower incident surface 311 is located in the area 314 above the convex surface 31BA of the incident surface 31B (see FIG. 8). (See reference), the light source 22 is closer. That is, when the region 314 is spherical with a radius r1 centered on the light source 22 (see position P1), the distance r2 from the light source 22 (see position P1) to an arbitrary point in the lower incident surface 311 is r1. It is below.

Here, referring to the optical control member 30′ according to the comparative example shown in FIG. 9, the optical control member 30′ is different from the optical control member 30 according to the present embodiment in that the incident surface 31B is replaced with the incident surface 31B′. The difference is that. In the comparative example, the incident surface 31B' is spherical (spherical) centered on the light source (see position P1) except for the convex surface 31BA. In this case, as shown in FIG. 9, the light that is incident from the lower region of the incident surface 31B′ and reflected in the region near the light source 22 on the second reflector surface 31E′ in the direction of the lens optical axis Z is: The light is reflected by the rearward inclined surface 31CB and heads for the light scattering portion 31F. That is, it becomes difficult to reach the emission surface 31A.

On the other hand, in the present embodiment, as described above, the area of the second reflector surface 31E closer to the light source 22 in the direction of the lens optical axis Z is the area 31E-1 where the light L2 is reflected, that is, the exit surface. It becomes a region 31E-1 where the light entering 31A is reflected. This makes it possible to reduce the amount of light that goes to the light scattering portion 31F as in the comparative example shown in FIG. 9 and increase the amount of light that enters the emission surface 31A. In this way, in the present embodiment, even among the light from the light source 22, the light reflected by the region of the second reflector surface 31E on the side closer to the light source 22 in the direction of the lens optical axis Z is also emitted from the emission surface 31A. It can be effectively used as a light distribution pattern to be emitted. That is, the utilization efficiency of light is increased.

Further, according to the present embodiment, the second reflector surface 31E can be designed as a reflecting surface (free-form surface) having the virtual focus F1 as a focal point, so that the structure can be easily designed.

In the present embodiment, the second reflector surface 31E includes a region 31E-1 in which the light L2 is reflected and a region 31E-2 in which the light L4 is reflected, but in the modification, the second reflector surface 31E is Only the region 31E-1 where the light L2 is reflected may be included.

The present invention has been described above based on the specific embodiments. However, the present invention is not limited to the above-described embodiments, and modifications and improvements to the above-described embodiments are also technical techniques of the invention. It is included in the target range.

For example, although the case where the composite optical lens 31 forms a low-beam light distribution pattern has been described above, a composite optical lens that forms a high-beam light distribution pattern that does not have the shade portion 31C may be used. Since it is possible to form the diffused light distribution pattern and the condensed light distribution pattern of the high beam light distribution pattern by the compound optical lens, the vehicle lamp can be downsized.

Further, the shade function may be enhanced by depositing aluminum or coloring the surface of the shade portion 31C.
Further, in the above-described embodiment, when the entire lower incident surface 311 traces the light refracted by the lower incident surface 311 in the direction opposite to the traveling direction thereof, each light ray relating to the light converges on the virtual focal point F1. However, it is not limited to this. For example, the upper part region 312 of the lower incident surface 311 may have a different design.
As described above, the present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art from the description of the claims.

1 Lamp Unit 10 Heat Sink 11 Base 11A Positioning Pin 11B Screwing Hole 12 Radiating Fin 20 Light Source Device 21 Heat Transfer Member 22 Light Source 22A Substrate 22B Light Emitting Area 23 Connection 23A Opening 23B Connector Connection 24A Positioning Hole 24B Screw Hole 30 Optical control member 31 Composite optical lens 31A Emission surface 31B Incident surface 31BA Convex surface 31C Shade portion 31CA Top line 31CB Rearward inclined surface 31CC Frontward inclined surface 31CCA Reflection angle adjusting portion 31D First reflector surface 31E Second reflector surface 31F Light scattering portion 31G Reflective surface 32 Fixed part 32A Leg part 32B Base part 32BA Positioning hole 32BB Screw hole 40 Cover 41 Cover part 41A Cutout 42 Flange part 42A Positioning hole 42B Screw hole L1, L2, L3, L4, L5, L6 Optical N screw Z Lens optical axis 101L, 101R Vehicle headlight 102 Vehicle

Claims (4)

A vehicle lamp including a light source and a compound optical lens,
The compound optical lens,
An incident surface on which light is incident,
An emission surface that irradiates the light incident from the incident surface to the front side,
A shade portion formed between the entrance surface and the exit surface,
A first reflector surface which is formed on the upper side of the incident surface side and which reflects the light forming the first light distribution pattern toward the emission surface;
A second reflector surface that is formed on the lower side of the incident surface side and that reflects the light forming the condensed light distribution pattern toward the emission surface,
The incident surface is formed so that a lower incident surface located below the light source is closer to the light source than an upper incident surface located above the light source in a vertical cross section passing through the optical axis. A vehicle lamp. The vehicular lamp according to claim 1, wherein the second reflector surface is formed so that its focal point is located above the light source. The lower incident surface is formed such that when the light refracted by the lower incident surface is traced in a direction opposite to its traveling direction, the respective light rays relating to the light are gathered at a point above the light source. The vehicle lamp according to claim 1 or 2. The incident surface has a concave shape in which the entire shape is recessed inward of the compound optical lens, the upper side and the center side of the lower incident surface, protruding outside the compound optical lens and from the first light distribution pattern. The vehicular lamp according to claim 1, wherein the vehicular lamp has a convex surface on which light that forms a small second light distribution pattern is incident.

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