JP2018056005A - Lighting fixture for vehicle - Google Patents

Abstract

An object of the present invention is to provide a vehicular lamp that includes a lens unit that integrates a plurality of lenses located at different positions in the front-rear direction, and that suppresses the occurrence of glare. A vehicular lamp according to the present invention includes a first light emitting chip for a condensing part, a second light emitting chip for a diffusing part arranged in a position substantially the same as the first light emitting chip in the front-rear direction. The first light emitting chip and a first lens part disposed on the front side of the second light emitting chip, wherein the first lens part has a first incident surface curved in a front side. A first lens formed so as to be positioned on the front side by a first distance from the first light emitting chip, and a second incident surface having a curved shape on the front side is shorter than the first distance from the second light emitting chip. A second lens formed so as to be positioned on the front side by two distances, and formed between the first lens and the second lens so that there is no step between the first lens and the second lens. A first connecting portion to be connected. [Selection] Figure 2

Description

  The present invention relates to a vehicular lamp.

Patent Document 1 discloses a vehicular lamp using a plurality of lenses having different focal lengths.
And in patent document 1, each lens is arrange | positioned so that the position of the front-back direction with respect to each light source may differ according to a focal distance.

JP 2012-174656 A

  By the way, when a plurality of lenses are used, if a connection portion is provided between the plurality of lenses, and a single lens member in which each lens is integrally connected by this connection portion is used, the lenses are individually manufactured. Compared to the case, the manufacturing cost of parts can be greatly reduced.

  However, as in Patent Document 1, when the positions of the lenses are different in the front-rear direction, the connecting portion that connects the lenses together cannot simply connect the end portions of the lenses in a straight line in the horizontal direction. For example, when the connection portion is irradiated with light for some reason, glare may occur.

  The present invention has been made in view of such circumstances, and a vehicular lamp including a lens unit in which a plurality of lenses located at different positions in the front-rear direction are integrated, and the vehicular lamp that suppresses the occurrence of glare. The purpose is to provide.

The present invention is grasped by the following composition in order to achieve the above-mentioned object.
(1) The vehicular lamp according to the present invention includes a first light-emitting chip for the light condensing unit, a second light-emitting chip for the diffusing unit that is disposed at substantially the same position in the front-rear direction as the first light-emitting chip, A first lens part disposed on the front side of the first light emitting chip and the second light emitting chip, wherein the first lens part has a first incident surface curved in a front side. A first lens formed so as to be positioned on the front side by a first distance from one light emitting chip, and a second incident surface having a curved shape on the front side is shorter than the first distance from the second light emitting chip. The second lens is formed so as to be positioned at the front side by a distance, and is formed between the first lens and the second lens, and connects the first lens and the second lens so that there is no step. A first connecting portion.

(2) In the configuration of (1), a second lens unit is provided on the front side of the first lens unit, and the second lens unit is positioned on the front side of the first lens. A third lens formed in this manner, and a fourth lens formed so as to be positioned in front of the second lens.

(3) In the configuration of (2), the third lens has a third entrance surface of the third lens that is separated from the first exit surface of the first lens by a third distance at a distance in the front-rear direction. Formed on the second lens portion, and the fourth lens has a fourth entrance surface of the fourth lens that is separated by a fourth distance from the second exit surface of the second lens in the front-rear direction. Thus, the fourth lens portion is formed on the second lens portion, and the fourth distance is longer than the third distance.

(4) In the configuration of the above (2) or (3), the second lens portion includes one third output surface of the third lens and a fourth output surface of the fourth lens connected without a step. It has an exit surface.

(5) In the configuration of (3) or (4) above, the third light emitting chip provided on the opposite side of the second light emitting chip across the first light emitting chip in the horizontal direction, and the second light emitting element in the horizontal direction. A fourth light emitting chip provided on the opposite side of the first light emitting chip across the light emitting chip, and the first lens portion is opposite to the second lens across the first lens in the horizontal direction. A fifth lens formed to be positioned on the side, and a sixth lens formed to be positioned on the opposite side of the first lens across the second lens in the horizontal direction, the second lens The lens portion includes a seventh lens formed so as to be positioned on the front side of the fifth lens, and an eighth lens formed so as to be positioned on the front side of the sixth lens. In the fifth lens, the fifth light incident surface of the fifth lens is the third light emitting chip. The sixth lens is formed on the first lens portion so as to be positioned in front of the first distance by a distance substantially equal to the first distance, and the sixth lens has a sixth incident surface of the sixth lens that emits the fourth light emission. The seventh lens is formed on the first lens portion so as to be positioned on the front side by a distance substantially equal to the second distance from the chip, and the seventh lens has a seventh entrance surface of the seventh lens. The eighth lens is formed on the second lens portion so as to be positioned on the front side by a distance substantially equal to the third distance from the fifth emission surface of the lens, and the eighth lens is the eighth incident surface of the eighth lens. Is formed on the second lens portion so as to be positioned on the front side by a distance substantially equal to the fourth distance from the sixth emission surface of the sixth lens, and the first lens portion is Formed between the first lens and the fifth lens, A second connecting portion that connects the lens and the fifth lens so that there is no step; and a step formed between the second lens and the sixth lens. And a third connecting portion connected so as not to exist.

(6) In the configuration of (5), the fifth incident surface has a shape curved forward.
The second connection portion has a substantially constant thickness from the first lens to the fifth lens, and the second connection portion includes a fifth region according to a curved shape of the fifth incident surface. , A second first region according to the curved shape of the first incident surface, the sixth incident surface has a shape curved forward, and the third connection portion includes The thickness from the second lens to the sixth lens is substantially constant, and the third connection portion includes a sixth region according to the curved shape of the sixth incident surface and the curved state of the second incident surface. 2nd 2nd area | region according to this.

(7) In any one of the constitutions (1) to (6), the thickness of the first connecting portion from the first lens to the second lens is substantially constant, The connecting portion includes a first first region according to a curved state of the first incident surface, and a first second region according to a curved shape of the second incident surface. The first region is wider than the first second region in the horizontal direction.

  ADVANTAGE OF THE INVENTION According to this invention, in the vehicle lamp provided with the lens part which integrated the several lens located in the position where the front-back direction differs, the vehicle lamp which suppressed generation | occurrence | production of a glare can be provided.

1 is a plan view of a vehicle including a vehicle lamp according to a first embodiment of the present invention. It is a horizontal sectional view of the lamp unit of a 1st embodiment concerning the present invention. It is a horizontal sectional view for explaining a lamp unit of a 2nd embodiment concerning the present invention.

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

  In the embodiments and drawings, “front” and “rear” indicate “forward direction” and “reverse direction” of the vehicle, respectively, and “up”, “down”, “left” unless otherwise specified. "And" Right "respectively indicate directions viewed from the driver who gets on the vehicle.

  The vehicular lamp according to the embodiment of the present invention is a vehicular headlamp (101R, 101L) provided on each of the left and right sides of the front of the vehicle 102 shown in FIG. 1, and is simply referred to as a vehicular lamp.

  The vehicular lamp according to the present embodiment includes a housing (not shown) that opens to the front side of the vehicle and an outer lens (not shown) that is attached to the housing so as to cover the opening, and is formed by the housing and the outer lens. A lamp unit 10 (see FIG. 2) and the like are disposed in the lamp chamber.

FIG. 2 is a horizontal sectional view of the lamp unit 10.
FIG. 2 is a horizontal sectional view passing through the light emission centers of the first light source 30 and the second light source 35.

  As shown in FIG. 2, the lamp unit 10 includes a heat sink 20, a first light source 30 provided on the heat sink 20, a second light source 35 provided on the heat sink 20, and the first light source 30 and the second light source 35. The first lens unit 40 disposed on the front side and the second lens unit 50 disposed on the front side of the first lens unit 40 are provided.

In the present embodiment, the light from the first light source 30 forms, for example, a condensing light distribution pattern that is distributed on the center side such as a high beam light distribution pattern or a low beam light distribution pattern, and the light from the second light source 35. However, for example, a diffused light distribution pattern such as a high beam light distribution pattern or a low beam light distribution pattern is formed.
Therefore, the first light source 30 is a light source for the light condensing unit in the lamp unit 10, and the second light source 35 is a light source for the diffusion unit in the lamp unit 10.

  In addition, the lens provided in each of the first lens unit 40 and the second lens unit 50 described later is also a lens for the light condensing unit provided corresponding to the first light source 30. The lens provided corresponding to the second light source 35 is a lens for the diffusion section.

(Heat sink 20)
As shown in FIG. 2, the heat sink 20 includes a base portion 21 on which the first light source 30 and the second light source 35 are arranged, and a plurality of heat radiation fins 22 formed on the rear side of the base portion 21.

  For example, the heat sink 20 is preferably formed of a material such as aluminum having high thermal conductivity and excellent heat dissipation.

  The base portion 21 of the heat sink 20 is also a mounting portion for attaching the fixing leg portion 41 of the first lens portion 40 and the fixing leg portion 51 of the second lens portion 50.

(First light source 30 and second light source 35)
The first light source 30 includes a first substrate 31 provided on the base portion 21 of the heat sink 20 and a first light emitting chip 32 provided on the first substrate 31.
In the present embodiment, an LED chip that is a semiconductor light emitting element is used as the first light emitting chip 32. However, instead of the LED chip, an LD chip (laser chip) that is a semiconductor light emitting element is used. Also good.

  The second light source 35 has the same configuration as that of the first light source 30, and includes a second substrate 36 provided on the base portion 21 of the heat sink 20, a second light emitting chip 37 provided on the second substrate 36, In this embodiment, an LED chip is used for the second light emitting chip 37, but an LD chip (laser chip) may be used instead of the LED chip.

  In the present embodiment, the first light source 30 and the second light source 35 individually have the first substrate 31 and the second substrate 36, but it is not necessary to separately provide the substrates, and a common substrate is used. May be.

  Therefore, it is arbitrary whether the first light emitting chip 32 and the second light emitting chip 37 are provided on separate substrates (first substrate 31 and second substrate 36) or on a common substrate. The first light emitting chip 32 for the condensing part and the second light emitting chip 37 for the diffusing part arranged in the same position as the first light emitting chip 32 in the front-rear direction are provided so as to be aligned in the horizontal direction. It only has to be.

(Second lens unit 50)
The second lens unit 50 includes a third lens 52 formed so as to be positioned in front of the first lens 42 of the first lens unit 40 and a front side of the second lens 43 of the first lens unit 40. And a fourth lens 53 formed so as to be positioned at the center.

  The second lens unit 50 includes a pair of fixing leg portions 51 provided at the outer ends of the third lens 52 and the fourth lens 53 in the horizontal direction.

  When the fixing leg 51 is fixed to the heat sink 20, the third lens 52 and the fourth lens 52 are provided on the front side by a predetermined distance from the first light source 30 and the second light source 35 provided on the heat sink 20. The lens 53 is formed so as to be positioned.

  However, instead of forming the fixing leg portion 51 on the second lens portion 50, the second lens portion 50 may be attached to the heat sink 20 using a lens holder or the like.

  Note that, in the second lens unit 50, the third lens 52 and the fourth lens 53 are formed such that adjacent end portions are directly connected to each other, and the gap between the third lens 52 and the fourth lens 53 is formed. There is no connection part.

  The third lens 52 is formed such that the light emitted to the front side from the third emission surface 52a forms a predetermined light distribution pattern, and the third emission surface 52a that emits light formed in a planar shape. A third incident surface 52b on which the incident light is incident.

  Similarly, the fourth lens 53 has a fourth emission surface 53a that emits light formed in a planar shape, and light that is irradiated forward from the fourth emission surface 53a forms a predetermined diffused light distribution pattern. And a fourth incident surface 53b on which the light formed on is incident.

  The second lens unit 50 has one exit surface in which the third exit surface 52a and the fourth exit surface 53a are connected without any step.

However, the exit surface of the second lens unit 50 is not limited to a planar shape, and may be a curved surface shape without a step according to a request for design or the like.
In this case, the third exit surface 52a has a curved surface shape, and the light emitted from the third exit surface 52a is shaped into a shape that forms a predetermined condensing light distribution pattern corresponding to the curved surface shape. The three incident surfaces 52b may be formed.

  Similarly, the fourth incident surface 53b may be formed in a shape in which the light emitted from the fourth output surface 53a forms a predetermined diffused light distribution pattern according to the curved surface shape of the fourth output surface 53a. .

  Further, in the present embodiment, the third incident surface 52b is configured such that light emitted from the third exit surface 52a forms a light collection pattern according to the shape of the planar third exit surface 52a described above. In addition, the horizontal center side is formed as a free-form surface protruding most rearward.

  Similarly, in the present embodiment, the fourth incident surface 53b is configured such that light emitted from the fourth output surface 53a forms a diffused light distribution pattern in accordance with the shape of the above-described planar fourth output surface 53a. In addition, there are two projecting surfaces formed in a free curved surface projecting farthest rearward on the left and right outer sides than the horizontal center side, and the two projecting surfaces are connected at the center side of the fourth incident surface 53b, It is formed in a shape having a concave surface recessed in the front side at the center side in the horizontal direction.

  On the other hand, in the third incident surface 52b and the fourth incident surface 53b, the position of the most protruding portion is substantially the same in the front-rear direction.

(First lens unit 40)
The first lens unit 40 is disposed on the front side of the first light emitting chip 32 and the second light emitting chip 37 and on the rear side of the second lens unit 50.
The first lens unit 40 includes a first lens 42 formed such that the first incident surface 42b is located on the front side from the first light emitting chip 32 by the first distance X1, and the second incident surface 43b is the first incident surface 43b. The second lens 43 is formed so as to be positioned on the front side by a second distance X2 shorter than the first distance X1 from the two light emitting chips 37, and is formed between the first lens 42 and the second lens 43. A first connecting portion 44 that connects the lens 42 and the second lens 43.

Note that the first distance X1 is the point where the light emitting center of the first light emitting chip 32 and the axis (chip optical axis) extending in the front-rear direction passing through the light emitting center of the first light emitting chip 32 intersect the first incident surface 42b. Is the distance between.
Similarly, the second distance X2 also includes a point where the light emitting center of the second light emitting chip 37 and an axis extending in the front-rear direction passing through the light emitting center of the second light emitting chip 37 (chip optical axis) intersect the second incident surface 43b. Is the distance between.

  Further, the first lens unit 40 includes a pair of fixing leg portions 41 provided at the outer ends in the horizontal direction of the first lens 42 and the second lens 43.

  When the fixing leg 41 is fixed to the heat sink 20, the first lens 42 and the second lens 42 are moved forward by a predetermined distance from the first light source 30 and the second light source 35 provided on the heat sink 20. The lens 43 is formed so as to be positioned.

  However, instead of forming the fixing leg 41 on the first lens unit 40, the first lens unit 40 may be attached to the heat sink 20 using a lens holder or the like.

The first lens 42 performs light distribution control in which light emitted from the first light emitting chip 32 is appropriately incident on the third incident surface 52 b of the third lens 52.
That is, light distribution control is performed so that the light emitted from the first light emitting chip 32 does not go outside the third incident surface 52b.

  Therefore, the first lens 42 has a first incident surface 42b that is curved forward and a shape of the first incident surface 42b so as to receive light emitted from the first light emitting chip 32 without waste. Accordingly, a free-form first emission surface 42a that protrudes forward and is formed so as to appropriately irradiate light toward the third incident surface 52b of the third lens 52 is provided.

Similarly, the second lens 43 performs light distribution control in which light emitted from the second light emitting chip 37 is appropriately incident on the fourth incident surface 53 b of the fourth lens 53.
That is, the light distribution control is performed so that the light emitted from the second light emitting chip 37 does not go outside the fourth incident surface 53b.

  For this reason, the second lens 43 responds to the shape of the second incident surface 43b that is curved forward and the shape of the second incident surface 43b so as to receive the light emitted from the second light emitting chip 37 without waste. And a free-form second emission surface 43a that protrudes forward and is formed so as to appropriately irradiate light toward the fourth incidence surface 53b of the fourth lens 53.

  Here, since the light emitted from the fourth emission surface 53a of the fourth lens 53 forms a diffused light distribution pattern, the second lens 43 and the fourth lens 53 can be easily formed so as to form a widened light distribution. It is desirable that the distance between them is large.

  On the other hand, since the light irradiated from the 3rd output surface 52a of the 3rd lens 52 forms a condensing light distribution pattern, the 1st lens 42 and the 3rd lens 52 are easy to form the light distribution which does not spread. It is desirable that the distance between is not separated.

  Therefore, as described above, the second lens 43 is arranged close to the second light emitting chip 37 so that the second distance X2 is shorter than the first distance X1, so that the third lens 52 is third. The fourth entrance surface 53b of the fourth lens 53 and the second exit surface 43a of the second lens 43 are larger than the third distance Y1, which is the distance between the entrance surface 52b and the first exit surface 42a of the first lens 42. The fourth distance Y2, which is the distance between them, is made longer.

The third distance Y1 is a point that is the most rearward position on the third incident surface 52b of the third lens 52 and a point that is the most frontal position on the first emission surface 42a of the first lens 42. It is the distance seen only in the front-rear direction that does not consider the horizontal displacement between and.
Similarly, the fourth distance Y2 is a point that is the rearmost position on the fourth incident surface 53b of the fourth lens 53 and a frontmost position on the second emission surface 43a of the second lens 43. This is the distance seen only in the front-rear direction without considering the horizontal displacement between the points.

  By the way, in order to make the fourth distance Y2 longer than the third distance Y1, it is also possible to provide the fourth lens 53 on the front side instead of bringing the second lens 43 closer to the second light emitting chip 37. It is.

  However, in such a case, the fourth lens 53 protrudes to the front side of the third lens 52. Therefore, the emission surface of the second lens unit 50 can be formed so as to be seen as one emission surface. I can't do it and it looks bad.

  In this regard, if the second lens 43 is brought closer to the second light emitting chip 37 as in the present embodiment, the fourth lens 53 does not need to protrude beyond the third lens 52, and thus the second lens portion. The 50 exit surfaces can be formed so as to be seen as one exit surface, and the appearance can be improved.

  On the other hand, since the first lens 42 is provided closer to the first light emitting chip 32 than the third lens 52, the first lens 42 is smaller in size than the third lens 52. Similarly, the second lens 43 is also smaller than the fourth lens 53. The size is smaller than that of the fourth lens 53 because it is provided near the second light emitting chip 37.

Since the horizontal positions of the first lens 42 and the second lens 43 are determined by the relationship between the third lens 52 and the fourth lens 53, the first lens 42 and the second lens 43, as in the second lens unit 50. The end portions of the two lenses 43 cannot be arranged close to each other so as to be directly connected.
Accordingly, in the first lens unit 40, as described above, the first lens 42 and the second lens 43 are connected by the first connection unit 44.

  Specifically, the first connection portion 44 includes a first first region 44a according to the curved state of the first incident surface 42b and a first second region 44b according to the curved shape of the second incident surface 43b. The first first region 44a is wider in the horizontal direction than the first second region 44b.

  Further, the thickness of the first connecting portion 44 from the first lens 42 to the second lens 43 is substantially constant.

As described above, when the first connection portion 44 is formed, the first lens 42 and the second lens 43 can be connected so that there is no step. For some reason, the first connection portion 44 is connected to the first connection portion 44. Even when the light is irradiated, the irregular reflection that occurs when the stepped portion is irradiated with light does not occur, so that the occurrence of glare can be suppressed.
Furthermore, by making the thickness of the first connection portion 44 substantially constant, it is possible to avoid sink marks when the first lens portion 40 is molded.

  As described above, according to the configuration of the first embodiment, a vehicle including the first lens unit 40 in which a plurality of lenses (first lens 42 and second lens 43) located at different positions in the front-rear direction are integrated. Even in the case of a lamp, it is possible to suppress the occurrence of glare.

(Second Embodiment)
Next, a vehicle lamp according to a second embodiment of the present invention will be described with reference to FIG.
Note that description of the same configuration as that of the first embodiment may be omitted.

FIG. 3 is a horizontal sectional view for explaining the lamp unit 10 of the present embodiment.
Although illustration of the fixing leg 41 of the first lens unit 40, the fixing leg 51 of the second lens unit 50, the substrate of the light source and the heat sink 20 is omitted, these are the first embodiment. It is the same as described.

  That is, a fixing leg 41 is provided at the end of the first lens unit 40 on the outer side in the horizontal direction of the fifth lens 46 and the sixth lens 47 described later, and the second lens unit 50 will be described later. Fixing legs 51 are provided at the outer ends of the seventh lens 54 and the eighth lens 55 in the horizontal direction.

  As shown in FIG. 3, the lamp unit 10 of the present embodiment further includes a third light emitting chip 34 provided on the opposite side of the second light emitting chip 37 across the first light emitting chip 32 in the horizontal direction, and a horizontal direction. And a fourth light emitting chip 39 provided on the opposite side of the first light emitting chip 32 with the second light emitting chip 37 interposed therebetween.

The third light emitting chip 34 is an LED chip of a third light source that emits light that forms a condensing light distribution pattern.
However, as in the first embodiment, the third light emitting chip 34 may be an LD chip.

  Although not shown, the third light source includes a third substrate provided on the base portion 21 of the heat sink 20 and a third light emitting chip 34, and includes the first light source 30 and the first light source 30. The configuration is the same as that of the two light sources 35.

The fourth light emitting chip 39 is an LED chip of a fourth light source that emits light forming a diffused light distribution pattern.
However, as in the first embodiment, the fourth light emitting chip 39 may be an LD chip.

  Although not shown, the fourth light source includes a fourth substrate provided on the base portion 21 of the heat sink 20 and a fourth light emitting chip 39. The configuration is the same as that of the two light sources 35.

  Further, the first lens unit 40 sandwiches the second lens 43 in the horizontal direction and the fifth lens 46 formed so as to be positioned on the opposite side of the second lens 43 with the first lens 42 in the horizontal direction. And a sixth lens 47 formed so as to be located on the opposite side of the first lens 42.

  The fifth lens 46 is the same lens as the first lens 42, and the sixth lens 47 is the same lens as the second lens 43.

  In addition, the second lens unit 50 includes a seventh lens 54 that is formed on the front side of the fifth lens 46 and an eighth lens that is formed on the front side of the sixth lens 47. 55.

  The seventh lens 54 is the same lens as the third lens 52, and the eighth lens 55 is the same lens as the fourth lens 53.

  As can be seen from the above configuration, in the second embodiment, the condensing unit configuration and the diffusing unit configuration of the first embodiment are increased by one, and the condensing light distribution pattern and diffusion are increased. The light quantity of the light distribution pattern can be increased.

  Accordingly, the detailed arrangement and the like are the same as those described in the first embodiment, and the fifth lens 46 has the fifth incident surface 46b of the fifth lens 46 at the first distance from the third light emitting chip 34. The sixth lens 47 is formed on the first lens portion 40 so as to be positioned on the front side by a distance substantially equal to X1 (see FIG. 2). The first lens unit 40 is formed so as to be positioned on the front side by a distance substantially equal to the second distance X2 (see FIG. 2) from the chip 39.

  In addition, the seventh lens 54 has the second entrance surface 54b so that the seventh entrance surface 54b of the seventh lens 54 is positioned on the front side by a distance substantially equal to the third distance Y1 from the fifth exit surface 46a of the fifth lens 46. The eighth lens 55 is formed on the lens unit 50, and the eighth entrance surface 55b of the eighth lens 55 is located on the front side by a distance substantially equal to the fourth distance Y2 from the sixth exit surface 47a of the sixth lens 47. The second lens portion 50 is formed so as to be positioned.

  And the 1st lens part 40 is formed between the 1st lens 42 and the 5th lens 46, The 2nd connection part 45 which connects between the 1st lens 42 and the 5th lens 46 without a level difference, A third connection portion 48 is formed between the second lens 43 and the sixth lens 47 and connects the second lens 43 and the sixth lens 47 so that there is no step.

  Specifically, like the first incident surface 42b, the fifth incident surface 46b has a shape curved forward, and the second connecting portion 45 follows the curved shape of the fifth incident surface 46b. It has the 5th field 45a and the 2nd 1st field 45b according to the curve shape of the 1st entrance plane 42b.

  Further, the second connecting portion 45 is also formed to have a substantially constant thickness from the first lens 42 to the fifth lens 46, similarly to the first connecting portion 44.

  Further, the sixth incident surface 47b has a shape curved forward as in the second incident surface 43b, and the third connecting portion 48 is a sixth shape according to the curved shape of the sixth incident surface 47b. It has the area | region 48a and the 2nd 2nd area | region 48b according to the curved state of the 2nd entrance plane 43b.

  Similarly to the first connection portion 44 and the second connection portion 45, the third connection portion 48 is also formed with a substantially constant thickness from the second lens 43 to the sixth lens 47.

  In the second embodiment configured as described above, the second connection portion 45 and the third connection portion 48 are configured not to have a level difference that causes glare, while suppressing the occurrence of glare. It is possible to increase the light amounts of the light collection light distribution pattern and the diffusion light distribution pattern.

  In the second embodiment as well, the second lens unit 50 is a single plane in which the planar third emission surface 52a, fourth emission surface 53a, seventh emission surface 54a, and eighth emission surface 55a are connected without any step. Although it has a shape emitting surface, as described in the first embodiment, the emitting surface of the second lens unit 50 may be a curved surface that is curved without a step according to the required design. Good.

Although the present invention has been described based on the specific embodiments, the present invention is not limited to the above embodiments.
In the above embodiment, the optical system is a two-lens type optical system having the first lens unit 40 and the second lens unit 50. For example, depending on the vehicular lamp, a lens unit having a plurality of lenses may be provided. There may be only one, and even in such a case, it is possible to suppress the glare by making the connection between the lenses as in the connection portion of the above embodiment.
Therefore, the present invention is not limited to one using two lens members.

  Thus, the present invention is not limited to a specific embodiment, and modifications and improvements that do not depart from the technical idea are also included in the technical scope of the invention. This will be apparent to those skilled in the art from the claims.

DESCRIPTION OF SYMBOLS 10 Lamp unit 20 Heat sink 21 Base part 22 Radiation fin 30 1st light source 31 1st board | substrate 32 1st light emitting chip 34 3rd light emitting chip 35 2nd light source 36 2nd board | substrate 37 2nd light emitting chip 39 4th light emitting chip 40 1st Lens portion 41 fixing leg portion 42 first lens 42a first exit surface 42b first entrance surface 43 second lens 43a second exit surface 43b second entrance surface 44 first connection portion 44a first first region 44b first 1st 2nd area | region 45 2nd connection part 45a 5th area | region 45b 2nd 1st area | region 46 5th lens 46a 5th exit surface 46b 5th entrance surface 47 6th lens 47a 6th exit surface 47b 6th entrance surface 48 3rd connection part 48a 6th area | region 48b 2nd 2nd area | region 50 2nd lens part 51 Fixing leg part 52 3rd lens 52a 3rd output surface 52b 3rd entrance surface 53 4th lens 5 a fourth emission surface 53b fourth incident surface 54 a seventh lens 54a seventh output surface 54b seventh incident surface 55 eighth lens 55a eighth output surface 55b eighth incident surface 101L, 101R headlamp 102 vehicle before the vehicle

Claims (7)

A first light emitting chip for the light collecting unit;
A second light emitting chip for the diffusing portion, the position of the front and rear direction being arranged at substantially the same position as the first light emitting chip;
A first lens unit disposed on the front side of the first light emitting chip and the second light emitting chip;
The first lens unit is
A first lens formed such that a first incident surface having a curved shape on the front side is positioned on the front side by a first distance from the first light emitting chip;
A second lens formed such that a second incident surface having a curved shape on the front side is positioned on the front side by a second distance shorter than the first distance from the second light emitting chip;
And a first connecting portion that is formed between the first lens and the second lens and connects the first lens and the second lens so that there is no step. Light fixture. A second lens unit disposed on the front side of the first lens unit;
The second lens unit is
A third lens formed to be positioned in front of the first lens;
The vehicular lamp according to claim 1, further comprising: a fourth lens formed so as to be positioned in front of the second lens. The third lens is formed in the second lens unit such that a third incident surface of the third lens is separated from the first emission surface of the first lens by a third distance in the front-rear direction. And
The fourth lens is formed in the second lens unit such that a fourth incident surface of the fourth lens is separated from the second emission surface of the second lens by a fourth distance in the front-rear direction. And
The vehicular lamp according to claim 2, wherein the fourth distance is longer than the third distance.   The second lens portion has a single exit surface in which the third exit surface of the third lens and the fourth exit surface of the fourth lens are connected without any step. Or the vehicle lamp of Claim 3. A third light emitting chip provided on the opposite side of the second light emitting chip across the first light emitting chip in the horizontal direction;
A fourth light emitting chip provided on the opposite side of the first light emitting chip across the second light emitting chip in the horizontal direction,
The first lens unit is
A fifth lens formed on the opposite side of the second lens across the first lens in the horizontal direction;
A sixth lens formed so as to be positioned on the opposite side of the first lens across the second lens in the horizontal direction,
The second lens unit is
A seventh lens formed to be positioned in front of the fifth lens;
An eighth lens formed to be positioned on the front side of the sixth lens,
The fifth lens is formed in the first lens unit such that a fifth incident surface of the fifth lens is positioned on the front side by a distance substantially equal to the first distance from the third light emitting chip.
The sixth lens is formed in the first lens unit such that a sixth incident surface of the sixth lens is positioned on the front side by a distance substantially equal to the second distance from the fourth light emitting chip.
The seventh lens is disposed on the second lens unit such that the seventh incident surface of the seventh lens is positioned on the front side by a distance substantially equal to the third distance from the fifth emission surface of the fifth lens. Formed,
The eighth lens is disposed on the second lens unit such that the eighth incident surface of the eighth lens is positioned on the front side by a distance substantially equal to the fourth distance from the sixth emission surface of the sixth lens. Formed,
The first lens unit is
A second connection part formed between the first lens and the fifth lens, and connecting the first lens and the fifth lens so that there is no step;
And a third connecting portion that is formed between the second lens and the sixth lens and connects the second lens and the sixth lens so that there is no step. Item 5. The vehicle lamp according to item 3 or 4. The fifth incident surface has a shape curved forward.
The second connecting portion has a substantially constant thickness from the first lens to the fifth lens,
The second connection portion is
A fifth region according to the curved shape of the fifth incident surface;
And a second first region according to the curved shape of the first incident surface,
The sixth incident surface has a shape curved forward.
The third connecting portion has a substantially constant thickness from the second lens to the sixth lens,
The third connecting portion is
A sixth region according to the curved shape of the sixth incident surface;
The vehicular lamp according to claim 5, further comprising: a second second region according to a curved state of the second incident surface. The first connecting portion has a substantially constant thickness from the first lens to the second lens,
The first connection part is:
A first first region according to a curved state of the first incident surface;
A first second region according to the curved shape of the second incident surface,
The vehicular lamp according to any one of claims 1 to 6, wherein the first first region is wider than the first second region in the horizontal direction.

Images