Vehicle lighting fixtures

Abstract

To provide a vehicular lighting tool capable of actualizing two good light distribution patterns even when two light sources are arranged neighboring each other.SOLUTION: A vehicular lighting tool includes a first light source 2, a second light source 3, and a projection optical system 4, the projection optical system 4 having a first lens 9 including a first incidence part 11, a first light emission part 13, and a second light emission part 14, and a second lens 10 including a third incidence part 15, a fourth incidence part 16, a third light emission part 17, and a fourth light emission part 18. The first lens 9 emits first light L1 entering from a second incidence part 12 to the inside, from the second light emission part 14 to the outside in a direction in which the light does not enter into the second lens 10, and emits second light L2 entering from the first incidence part 11 to the inside, from the first light emission part 13 to the outside in a direction in which the light does not enter into the second lens 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle lamp. [Background technology]

[0002] For example, a vehicle lighting fixture such as a vehicle headlamp includes a light source, a reflector that reflects light emitted from the light source in the direction in which the vehicle is traveling, a shade that blocks (cuts) a portion of the light reflected by the reflector, and a projection lens that projects the light that has been cut by the shade in the direction in which the vehicle is traveling.

[0003] In such vehicle lamps, a low beam light distribution pattern including a cutoff line at the upper end is formed by inverting and projecting the light source image defined by the front end of the shade using a projection lens to provide a passing beam (low beam).

[0004] In addition, in vehicle lighting fixtures, a separate light source that emits light in the direction the vehicle is traveling is placed below the shade, and the light emitted by this light source is projected by a projection lens as a driving beam (high beam), forming a high beam light distribution pattern above the low beam light distribution pattern.

[0005] Incidentally, in the vehicle lamp described in Patent Document 1 below, instead of the above-mentioned reflector and shade, a low beam light distribution pattern and a high beam light distribution pattern are formed by using two lenses provided corresponding to two upper and lower light sources, respectively. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2017-199660 A Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, in the vehicle lamp described in the above-mentioned Patent Document 1, a total reflection portion that defines a cutoff line is provided on the upper lens that forms a light distribution pattern for low beam. In addition, this total reflection portion prevents light that forms one of the light distribution patterns for low beam and the light distribution pattern for high beam from entering the other light distribution pattern as miscellaneous light (glare light).

[0008] However, in such a vehicle lamp, it is necessary to form a low beam light distribution pattern and a high beam light distribution pattern by two lenses provided corresponding to the upper and lower two light sources, respectively. Furthermore, since it is not possible to arrange the two upper and lower light sources adjacent to each other, it is necessary to arrange the two upper and lower light sources apart from each other.

[0009] The present invention has been proposed in consideration of the above-mentioned conventional circumstances, and aims to provide a vehicle lamp that makes it possible to obtain two good light distribution patterns even when two light sources are arranged adjacent to each other. [Means for solving the problem]

[0010] In order to achieve the above object, the present invention provides the following means. [1] A first light source that emits a first light; a second light source disposed adjacent to the first light source and configured to emit a second light in the same direction as the first light; a projection optical system that projects the first light and the second light in the same direction, the projection optical system includes a first lens including a first entrance section located on a side facing the first light source and for collimating the first light emitted from the first light source while entering the interior of the lens, a second entrance section located on a side facing the second light source and for collimating the second light emitted from the second light source while entering the interior of the lens, a first exit section located on the opposite side to the first entrance section and for condensing the first light incident from the first entrance section while exiting it to the outside, and a second exit section located on the opposite side to the second entrance section and for condensing the second light incident from the second entrance section while exiting it to the outside; a second lens including a third entrance portion located on a side opposite to the second exit portion and allowing the first light emitted from the first exit portion to enter into the lens; a fourth entrance portion located on a side opposite to the first exit portion and allowing the second light emitted from the second exit portion to enter into the lens; a third exit portion located on the opposite side to the third entrance portion and allowing the first light incident from the third entrance portion to exit to the outside; and a fourth exit portion located on the opposite side to the fourth entrance portion and allowing the second light incident from the fourth entrance portion to exit to the outside; the first lens emits the first light incident from the second incident portion in a direction not to be incident on the second lens, The second light incident from the first incident portion is emitted in a direction not to be incident on the second lens. death, before the first exit portion includes a first exit surface that collects the first light incident from the first entrance portion and outputs the first light to an outside of the first lens, the second exit portion includes a second exit surface that condenses the second light incident from the second entrance portion and outputs the second light to an outside of the first lens, the first exit surface reflects, inside the first lens, a first light other than that emitted from the second exit surface in a direction not entering the second lens, and a second light other than that emitted from the first exit surface in a direction not entering the second lens; The second exit surface reflects, inside the first lens, second light other than that emitted from the first exit surface in a direction not entering the second lens, and first light other than that emitted from the second exit surface in a direction not entering the second lens. Car Dual-purpose lamp. [ 2 〕 A first light source that emits a first light; a second light source disposed adjacent to the first light source and configured to emit a second light in the same direction as the first light; a projection optical system that projects the first light and the second light in the same direction, the projection optical system includes a first lens including a first entrance section located on a side facing the first light source and for collimating the first light emitted from the first light source while entering the interior of the lens, a second entrance section located on a side facing the second light source and for collimating the second light emitted from the second light source while entering the interior of the lens, a first exit section located on the opposite side to the first entrance section and for condensing the first light incident from the first entrance section while exiting it to the outside, and a second exit section located on the opposite side to the second entrance section and for condensing the second light incident from the second entrance section while exiting it to the outside; a second lens including a third entrance portion located on a side opposite to the second exit portion and allowing the first light emitted from the first exit portion to enter into the lens; a fourth entrance portion located on a side opposite to the first exit portion and allowing the second light emitted from the second exit portion to enter into the lens; a third exit portion located on the opposite side to the third entrance portion and allowing the first light incident from the third entrance portion to exit to the outside; and a fourth exit portion located on the opposite side to the fourth entrance portion and allowing the second light incident from the fourth entrance portion to exit to the outside; the first lens emits the first light incident from the second incident portion in a direction not to be incident on the second lens, The second light incident from the first incident portion is emitted in a direction not to be incident on the second lens, the first incident portion has a first light-collecting entrance surface, which is located in a portion facing the first light source, and into which a portion of the first light emitted from the first light source is incident; a second light-collecting entrance surface, which is located on the inner peripheral side of a portion that protrudes from a position surrounding the periphery of the first light-collecting entrance surface toward the first light source, and into which a portion of the first light emitted from the first light source is incident; and a first light-collecting reflection surface, which is located on the outer peripheral side of the protruding portion, and which reflects the first light incident from the second light-collecting entrance surface; the second incident portion has a third light collecting entrance surface located in a portion facing the second light source and into which a portion of the second light emitted from the second light source is incident, a fourth light collecting entrance surface located on an inner peripheral side of a portion protruding from a position surrounding the periphery of the third light collecting entrance surface toward the second light source and into which a portion of the second light emitted from the second light source is incident, and a second light collecting reflection surface located on an outer peripheral side of the protruding portion and reflecting the second light incident from the fourth light collecting entrance surface, A vehicular lamp, wherein the first incident portion and the 23rd incident portion partially overlap each other. [3] The first incident portion has a first light-collecting incidence surface located in a portion facing the first light source and into which a portion of the first light emitted from the first light source is incident, a second light-collecting incidence surface located on an inner peripheral side of a portion protruding from a position surrounding the periphery of the first light-collecting incidence surface toward the first light source and into which a portion of the first light emitted from the first light source is incident, and a first light-collecting reflection surface located on an outer peripheral side of the protruding portion and reflecting the first light incident from the second light-collecting incidence surface, the second incident portion has a third light collecting entrance surface located in a portion facing the second light source and into which a portion of the second light emitted from the second light source is incident, a fourth light collecting entrance surface located on an inner peripheral side of a portion protruding from a position surrounding the periphery of the third light collecting entrance surface toward the second light source and into which a portion of the second light emitted from the second light source is incident, and a second light collecting reflection surface located on an outer peripheral side of the protruding portion and reflecting the second light incident from the fourth light collecting entrance surface, The first incident portion and the second incident portion are partially overlapped with each other. 〕 1. A vehicle lamp as described above. [4] The vehicular lamp according to any one of [1] to [3], characterized in that a first light beam focused by the first exit portion and a second light beam focused by the second exit portion have mutually coincident focusing points located between the first lens and the second lens. [5] The vehicular lamp according to any one of [1] to [4], wherein the first light source and the second light source are provided on the same surface of the same substrate. [6] A heat sink thermally connected to the substrate and a socket with a coupler including a connector portion electrically connected to the substrate, The vehicle lamp described in [5] above is characterized in that the coupler socket is inserted into the inside of the lamp body through a mounting hole provided on the back side of the lamp body that houses the projection optical system, and is removably attached around the mounting hole. [7] A first light source that emits a first light; a second light source disposed adjacent to the first light source and configured to emit a second light in the same direction as the first light; a projection optical system that projects the first light and the second light in the same direction, the projection optical system includes a first lens including a first entrance section located on a side facing the first light source and for collimating the first light emitted from the first light source while entering the interior of the lens, a second entrance section located on a side facing the second light source and for collimating the second light emitted from the second light source while entering the interior of the lens, a first exit section located on the opposite side to the first entrance section and for condensing the first light incident from the first entrance section while exiting it to the outside, and a second exit section located on the opposite side to the second entrance section and for condensing the second light incident from the second entrance section while exiting it to the outside; a second lens including a third entrance portion located on a side opposite to the second exit portion and allowing the first light emitted from the first exit portion to enter into the lens; a fourth entrance portion located on a side opposite to the first exit portion and allowing the second light emitted from the second exit portion to enter into the lens; a third exit portion located on the opposite side to the third entrance portion and allowing the first light incident from the third entrance portion to exit to the outside; and a fourth exit portion located on the opposite side to the fourth entrance portion and allowing the second light incident from the fourth entrance portion to exit to the outside; the first lens emits the first light incident from the second incident portion in a direction not to be incident on the second lens, The second light incident from the first incident portion is emitted in a direction not to be incident on the second lens, a first light projected by the projection optical system forms a first light distribution pattern including a cutoff line at an upper end thereof defined by a boundary between the third exit portion and the fourth exit portion; The second light projected by the projection optical system forms a second light distribution pattern located above the first light distribution pattern. [ 8 a first light projected by the projection optical system forms a first light distribution pattern including a cutoff line at an upper end thereof defined by a boundary between the third exit portion and the fourth exit portion, The vehicular lamp according to any one of the above [1] to [6], characterized in that the second light projected by the projection optical system forms a second light distribution pattern located above the first light distribution pattern. Effect of the Invention

[0011] As described above, according to the present invention, it is possible to provide a vehicle lamp that makes it possible to obtain two good light distribution patterns even when two light sources are arranged adjacent to each other. [Brief description of the drawings]

[0012] [Figure 1] 1A is a cross-sectional view showing the optical path of a first light when a first light source is turned on, and FIG. 1B is a cross-sectional view showing the optical path of a second light when a second light source is turned on. FIG. [Diagram 2] 2 is a luminous intensity distribution diagram showing a light distribution pattern for low beam formed on the surface of a virtual vertical screen by a first light of the vehicle lamp shown in FIG. 1. [Diagram 3] 2 is a luminous intensity distribution diagram showing a high beam light distribution pattern formed on the surface of a virtual vertical screen by the second light of the vehicle lamp shown in FIG. 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings used in the following description, in order to make each component easier to see, the dimensions of the components may be shown at different scales, and the dimensional ratios of each component may not necessarily be the same as in reality.

[0014] In addition, in the drawings shown below, an XYZ Cartesian coordinate system is set up, with the X-axis direction representing the front-to-rear direction (length direction) of the vehicle lamp, the Y-axis direction representing the left-to-right direction (width direction) of the vehicle lamp, and the Z-axis direction representing the up-down direction (height direction) of the vehicle lamp.

[0015] As one embodiment of the present invention, a vehicle lamp 1 shown in, for example, FIGS. 1 to 3 will be described. Fig. 1 shows the configuration of the vehicle lamp 1, where (A) is a cross-sectional view showing the optical path of the first light L1 when the first light source 2 is turned on, and (B) is a cross-sectional view showing the optical path of the second light L2 when the second light source 3 is turned on. Fig. 2 is a luminous intensity distribution diagram showing a low-beam light distribution pattern formed on the surface of a virtual vertical screen by the first light L1 of the vehicle lamp 1. Fig. 3 is a luminous intensity distribution diagram showing a high-beam light distribution pattern formed on the surface of a virtual vertical screen by the second light L2 of the vehicle lamp 1.

[0016] The vehicle lamp 1 of this embodiment is an application of the present invention to a vehicle headlamp mounted in the front center of a saddle-type vehicle (not shown), such as a motorcycle or three-wheeled vehicle, and illuminates, in a freely switchable manner, a passing beam (low beam) that forms a low beam light distribution pattern including a cut-off line at the upper end, and a driving beam (high beam) that forms a high beam light distribution pattern above the low beam light distribution pattern, both toward the front of the vehicle (in the +X-axis direction).

[0017] Specifically, as shown in Figures 1(A) and (B), this vehicle lamp 1 includes, inside a lamp body (not shown), a first light source 2 that emits a first light L1, a second light source 3 that emits a second light L2, and a projection optical system 4 that projects the first light L1 and the second light L2.

[0018] The lamp body is composed of a housing with an opening at the front and a transparent lens cover that covers the opening of the housing. The shape of the lamp body can be changed as appropriate to suit the design of the vehicle.

[0019] The first light source 2 and the second light source 3 are, for example, light emitting diodes (LEDs) that emit white light. In the vehicle lamp 1 of this embodiment, the first light source 2 and the second light source 3 are arranged adjacent to each other and lined up in the vertical direction (up-down direction) of the vehicle lamp 1. Of these, one LED constituting the first light source 2 is arranged on the upper side, and one LED constituting the second light source 3 is arranged on the lower side.

[0020] The first light source 2 and the second light source 3 are mounted on one surface (the front surface in this embodiment) of a circuit board 5 on which a drive circuit for driving each LED is provided. As a result, the first light source 2 and the second light source 3 radially emit the first light L1 and the second light L2 toward the front (+X-axis side). In other words, the first light source 2 and the second light source 3 are provided on the same surface of the same circuit board 5, and are configured to radially emit the first light L1 and the second light L2 in the same direction.

[0021] The vehicle lamp 1 of this embodiment is provided with a heat sink 6 thermally connected to a circuit board 5, and a coupler-equipped socket 8 including a connector portion 7 electrically connected to the circuit board 5. The coupler-equipped socket 8 is detachably attached around an attachment hole provided on the rear side of the lamp housing the projection optical system 4, in a state where it is inserted into the inside of the lamp body through the attachment hole.

[0022] In this embodiment, the configuration includes the above-mentioned coupler-equipped socket 8, but the configuration is not necessarily limited to this. Therefore, a heat sink for dissipating heat generated by the first light source 2 and the second light source 3 may be attached to the other surface (the back surface in this embodiment) of the circuit board 5.

[0023] In addition, in this configuration, the mounting board on which the LEDs are mounted and the circuit board on which the drive circuit that drives the LEDs are provided may be arranged separately, and the mounting board and the circuit board may be electrically connected via a wiring cord called a harness to protect the drive circuit from heat generated by the LEDs.

[0024] The projection optical system 4 includes a first lens 9 disposed in front of the first light source 2 and the second light source 3, and a second lens 10 disposed in front of the first lens 9. The first lens 9 and the second lens 10 are disposed with an air layer (gap) K provided therebetween.

[0025] The first lens 9 and the second lens 10 can be made of a material having a higher refractive index than air, such as transparent resin such as polycarbonate or acrylic, or glass.

[0026] The first lens 9 has a first entrance portion 11 located on the side facing the first light source 2, a second entrance portion 12 located on the side facing the second light source 3, a first exit portion 13 located on the opposite side to the first entrance portion 11, and a second exit portion 14 located on the opposite side to the second entrance portion 12.

[0027] The first incident portion 11 collimates the first light L1 emitted from the first light source 2 and causes it to enter the inside of the first lens 9. Specifically, the first incident portion 11 has a convex first light collecting incident surface 11a located at a portion facing the first light source 2 and into which a portion of the first light L1 emitted from the first light source 2 is incident, a substantially cylindrical second light collecting incident surface 11b located on the inner periphery of a portion protruding from a position surrounding the periphery of the first light collecting incident surface 11a toward the first light source 2 side and into which a portion of the first light L1 emitted from the first light source 2 is incident, and a substantially truncated cone-shaped first light collecting reflection surface 11c located on the outer periphery of the protruding portion and reflecting the first light L1 incident from the second light collecting incident surface 11b.

[0028] 1(A), the first incident section 11 focuses the first light L1 that is radially emitted from the first light source 2 and enters the first lens 9 from the first light-collecting incident surface 11a toward the optical axis. On the other hand, the first light L1 that is entered the first lens 9 from the second light-collecting incident surface 11b is reflected by the first light-collecting reflecting surface 11c, thereby focusing the first light L1 toward the optical axis.

[0029] As a result, the first light L1 incident from the first entrance part 11 into the inside of the first lens 9 is guided toward the first exit part 13 in front of the first lens 9 while being collimated with respect to the optical axis of the first light L1. In addition, the optical axis of the first light L1 incident from the first entrance part 11 into the inside of the first lens 9 is parallel to the central axis of the first lens 9.

[0030] The second incident portion 12 collimates the second light L2 emitted from the second light source 3 and causes it to enter the inside of the first lens 9. Specifically, the second incident portion 12 has a convex third light collecting incident surface 12a located at a portion facing the second light source 3 and into which a portion of the second light L2 emitted from the second light source 3 is incident, a substantially cylindrical fourth light collecting incident surface 12b located on the inner periphery of a portion protruding from a position surrounding the periphery of the third light collecting incident surface 12a toward the second light source 3 side and into which a portion of the second light L2 emitted from the second light source 3 is incident, and a substantially truncated cone-shaped second light collecting reflection surface 12c located on the outer periphery of the protruding portion and reflecting the second light L2 incident from the fourth light collecting incident surface 12b.

[0031] 1(B), the second incident section 12 focuses the second light L2 that is incident from the third light-collecting incident surface 12a into the second lens 10, out of the second light L2 radially emitted from the first light source 2, toward the optical axis. On the other hand, the second light L2 that is incident from the fourth light-collecting incident surface 12b into the second lens 10 is focused by being reflected by the second light-collecting reflecting surface 12c toward the optical axis.

[0032] As a result, the second light L2 incident from the second entrance part 12 into the inside of the first lens 9 is guided toward the second exit part 14 in front of the first lens 9 while being collimated with respect to the optical axis of the second light L2. In addition, the optical axis of the second light L2 incident from the second entrance part 12 into the inside of the first lens 9 is parallel to the central axis of the first lens 9.

[0033] In the first lens 9, the first light source 2 and the second light source 3 are disposed adjacent to each other, so that the first entrance portion 11 and the second entrance portion 12 partially overlap each other.

[0034] Therefore, the first incident section 11 has a shape in which parts of the first collecting light incident surface 11a, the second collecting light incident surface 11b, and the first collecting light reflecting surface 11c are cut out along the boundary with the second incident section 12. Similarly, the second incident section 12 has a shape in which parts of the third collecting light incident surface 12a, the fourth collecting light incident surface 12b, and the second collecting light reflecting surface 12c are cut out along the boundary with the first incident section 11.

[0035] Therefore, the first light L1 radially emitted from the first light source 2 and the second light L2 radially emitted from the second light source 3 enter the inside of the first lens 9 from the first entrance portion 11 and the second entrance portion 12, with their optical paths overlapping each other.

[0036] The first emission part 13 has a first emission surface 13a. The first emission surface 13a is configured by an upper lens surface that is located between the central axis of the first lens 9 and the convex lens surface that configures the front side of the first lens 9.

[0037] 1(A), first exit portion 13 emits first light L1 incident from first entrance portion 11 to the outside of first lens 9 while condensing it by first exit surface 13a. As a result, first light L1 emitted from first exit portion 13 is condensed toward the front of first lens 9, and then enters second lens 10 while diffusing.

[0038] The second emission part 14 has a second emission surface 14a. The second emission surface 14a is configured by a lower lens surface that is located across the central axis of the first lens 9 from among the convex lens surfaces that configure the front side of the first lens 9.

[0039] 1(B), the second exit portion 14 emits the second light L2 incident from the second entrance portion 12 to the outside of the first lens 9 while being condensed by the second exit surface 14a. As a result, the second light L2 emitted from the second exit portion 14 is condensed toward the front of the first lens 9, and then enters the second lens 10 while being diffused.

[0040] Between the first lens 9 and the second lens 10, there is located a convergence point C where the first light L1 converged by the first emission part 13 and the second light L2 converged by the second emission part 14 coincide with each other. In addition, the convergence point C is located on the central axis of the first lens 9 and the second lens 10 which coincide with each other.

[0041] The second lens 10 has a third entrance section 15 located on the side opposite the second exit section 14, a fourth entrance section 16 located on the side opposite the first exit section 13, a third exit section 17 located on the opposite side of the third entrance section 15, and a fourth exit section 18 located on the opposite side of the fourth entrance section 16.

[0042] The third entrance portion 15 has a third entrance surface 15a. The third entrance surface 15a is configured by a lower lens surface that is located across the central axis of the second lens 10 from among the concave lens surfaces that configure the rear side of the second lens 10.

[0043] 1(A), the third entrance portion 15 causes the first light L1 emitted from the first exit portion 13 to enter the inside of the second lens 10 from the third entrance surface 15a. As a result, the first light L1 incident from the third entrance portion 15 to the inside of the second lens 10 is guided toward the third exit portion 17 located in front of the second lens 10.

[0044] The fourth entrance portion 16 has a fourth entrance surface 16a. The fourth entrance surface 16a is configured by the upper lens surface of the concave lens surface that constitutes the back side of the second lens 10 and that sandwiches the central axis of the second lens 10 therebetween.

[0045] 1(B), the fourth incident portion 16 causes the second light L2 emitted from the second exit portion 14 to enter the inside of the second lens 10 from the fourth incident surface 16a. As a result, the second light L2 incident from the fourth incident portion 16 to the inside of the second lens 10 is guided toward the fourth exit portion 18 located in front of the second lens 10.

[0046] The third emission part 17 has a third emission surface 17a. The third emission surface 17a is configured by a convex lens surface that is located on the front side of the second lens 10 and that constitutes the lower side across the central axis of the second lens 10.

[0047] 1A, the third exit portion 17 emits the first light L1 incident from the third entrance portion 15 to the outside of the second lens 10 while diffusing the first light L1 by the third exit surface 17a. As a result, the first light L1 emitted from the third exit portion 17 is projected in an enlarged manner toward the front of the second lens 10.

[0048] The fourth emission section 18 has a fourth emission surface 18a. The fourth emission surface 18a is formed by a convex lens surface that constitutes the upper side of the front side of the second lens 10 across the central axis of the second lens 10. The fourth emission surface 18a is provided so as to protrude forward from the third emission surface 17a. As a result, a step surface 10a along the central axis of the second lens 10 is provided between the third emission surface 17a and the fourth emission surface 18a.

[0049] 1B, the fourth exit portion 18 emits the second light L2 incident from the fourth entrance portion 16 to the outside of the second lens 10 while diffusing the second light L2 by the fourth exit surface 18a. As a result, the first light L1 emitted from the fourth exit portion 18 is projected in an enlarged manner toward the front of the second lens 10.

[0050] In addition, in the above-mentioned projection optical system 4, among the surfaces constituting the first lens 9 and the second lens 10, the other surfaces not shown or described can be freely designed (e.g., shielded) within a range that does not adversely affect the first light L1 and the second light L2 passing through the first lens 9 and the second lens 10.

[0051] In the vehicle lamp 1 of this embodiment having the above configuration, the first light L1 emitted by the first light source 2 is projected as a passing beam (low beam) toward the traveling direction of the vehicle by the projection optical system 4. At this time, as shown in Fig. 2, a low beam light distribution pattern (first light distribution pattern) is formed at the upper end, which includes a cut-off line defined by the boundary (step surface 10a) between the third and fourth emission parts.

[0052] On the other hand, in the vehicle lamp 1 of this embodiment, the second light L2 emitted by the first light source 2 and the second light source 3 is projected as a driving beam (high beam) in the traveling direction of the vehicle by the projection optical system 4. At this time, as shown in Fig. 3, the second light L projected forward from the projection optical system 4 forms a high beam light distribution pattern (second light distribution pattern) located above the low beam light distribution pattern (first light distribution pattern).

[0053] In the vehicle lamp 1 of this embodiment, as shown in FIG. 1(A), the first light L1', L1'' that enters the inside of the first lens 9 from the second incident portion 12 is emitted from the first lens 9 to the outside in a direction that does not enter the second lens 10.

[0054] Specifically, in this vehicle lamp 1, the first light L1' that enters the inside of the first lens 9 from the third collecting light entrance surface 12a of the second entrance portion 12 is emitted to the outside of the first lens 9 from the second exit surface 14a in a direction that does not enter the second lens 10.

[0055] On the other hand, of the second incident portion 12, the first light L1'' that enters the inside of the first lens 9 from the fourth collecting light incident surface 12b is reflected in this order by the second collecting light reflecting surface 12c, the second exit surface 14a, the first exit surface 13a, the first collecting light reflecting surface 11c, and the third collecting light incident surface 12a, and then is emitted from the second collecting light reflecting surface 12c to the outside of the first lens 9 in a direction that does not allow the first light to enter the second lens 10. In addition, a portion of the first light L1'' is emitted from the first collecting light reflecting surface 11c to the outside (rear) of the first lens 9.

[0056] In addition, in the vehicle lamp 1 of this embodiment, as shown in Figure 1 (B), the second light L2', L2'' that enters the inside of the first lens 9 from the first incident portion 11 is emitted from the first lens 9 to the outside in a direction that does not enter the second lens 10.

[0057] Specifically, in this vehicle lamp 1, the second light L2' that enters the inside of the first lens 9 from the first light collecting entrance surface 11a of the first incident portion 11 is emitted to the outside of the first lens 9 from the first exit surface 13a in a direction that does not enter the second lens 10.

[0058] On the other hand, the second light L2″ that enters the inside of the first lens 9 from the second collecting light incident surface 11b of the first incident portion 11 is reflected in this order by the first collecting light reflecting surface 11c, the first exit surface 13a, the second exit surface 14a, the second collecting light reflecting surface 12c, and the first collecting light incident surface 11a, and then exits from the first collecting light reflecting surface 11c to the outside of the first lens 9 in a direction that does not enter the second lens 10. In addition, a portion of the second light L2″ is exited from the second collecting light reflecting surface 12c to the outside (rear) of the first lens 9.

[0059] Therefore, the first exit surface 13a reflects, inside the first lens 9, first light L1'' other than that emitted from the second exit surface 14a in a direction not entering the second lens 10, and second light L2'' other than that emitted from the first exit surface 13a in a direction not entering the second lens 10.

[0060] On the other hand, the second exit surface 14a reflects, inside the first lens 9, second light L2'' other than that emitted from the first exit surface 13a in a direction not entering the second lens 10, and first light L1'' other than that emitted from the second exit surface 14a in a direction not entering the second lens 10.

[0061] As described above, in the vehicle lamp 1 of this embodiment, the first light L1', L1'' that enters the inside of the first lens 9 from the above-mentioned second entrance portion 12 can be emitted from the first lens 9 to the outside in a direction that does not enter the second lens 10, and the second light L2', L2'' that enters the inside of the first lens 9 from the first entrance portion 11 can be emitted from the first lens 9 to the outside in a direction that does not enter the second lens 10.

[0062] As a result, in the vehicle lamp 1 of this embodiment, the light forming one of the low beam light distribution pattern and the high beam light distribution pattern is prevented from entering the other light distribution pattern as stray light (glare light).

[0063] Therefore, in the vehicle lamp 1 of this embodiment, even if the first light source 2 and the second light source 3 are arranged adjacent to each other, as in the above-mentioned socket with coupler 8, it is possible to obtain good low beam and high beam light distribution patterns by projecting the first light L1 and the second light L2 emitted from the first light source 2 and the second light source 3 by the projection optical system 4.

[0064] The present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, an example was given of the application of the present invention to a vehicle headlamp of a saddle-type vehicle such as the above-mentioned motorcycle or three-wheeled vehicle, but the present invention can also be applied to a vehicle headlamp mounted on both corners of the front end of a vehicle such as a four-wheeled automobile.

[0065] Furthermore, although the vehicle lamp to which the present invention is applied is suitably used for the vehicle headlamp described above, the vehicle lamp to which the present invention is applied is not limited to the front vehicle lamp described above, but the present invention can also be applied to rear vehicle lamps such as rear combination lamps.

[0066] In other words, the present invention can be widely applied to vehicle lighting fixtures that include a first light source that emits a first light, a second light source that is arranged adjacent to the first light source and emits a second light in the same direction as the first light, and a projection lens that projects the first light and the second light in the same direction as each other.

[0067] The first light source and the second light source are not limited to the above-mentioned LED, and may be light-emitting elements such as laser diodes (LDs). The colors of the first light and the second light are not limited to the above-mentioned white light, and may be changed appropriately depending on the application, such as red light or orange light. Furthermore, the first light source and the second light source may be configured to selectively emit first light and second light of different colors.

[0068] Furthermore, in the above-mentioned vehicle lamp 1, the direction in which the above-mentioned first light source 2 and second light source 3 are arranged is the vertical direction of the vehicle lamp 1, but the present invention can also be applied to a vehicle lamp in which the direction in which the first light source and second light source are arranged is the horizontal direction of the vehicle lamp. [Explanation of symbols]

[0069] REFERENCE SIGNS LIST 1...vehicle lamp 2...first light source 3...second light source 4...projection optical system 5...circuit board 6...heat sink 7...connector section 8...socket with coupler 9...first lens 10...second lens 11...first entrance section 12...second entrance section 13...first exit section 14...second exit section 15...third entrance section 16...fourth entrance section 17...third exit section 18...fourth exit section C...light focusing point K...air layer L1...first light L2...second light

Claims

1. A first light source that emits a first light; a second light source disposed adjacent to the first light source and configured to emit a second light in the same direction as the first light; a projection optical system that projects the first light and the second light in the same direction; the projection optical system includes a first lens including a first entrance portion located on a side facing the first light source and for collimating a first light emitted from the first light source while entering the interior of the lens, a second entrance portion located on a side facing the second light source and for collimating a second light emitted from the second light source while entering the interior of the lens, a first exit portion located on the opposite side to the first entrance portion and for condensing the first light incident from the first entrance portion while exiting it to the outside, and a second exit portion located on the opposite side to the second entrance portion and for condensing the second light incident from the second entrance portion while exiting it to the outside; a second lens including a third incident portion located on a side opposite to the second incident portion and allowing the first light emitted from the first incident portion to enter into the lens, a fourth incident portion located on a side opposite to the first incident portion and allowing the second light emitted from the second incident portion to enter into the lens, a third incident portion located on an opposite side to the third incident portion and allowing the first light incident from the third incident portion to exit, and a fourth incident portion located on an opposite side to the fourth incident portion and allowing the second light incident from the fourth incident portion to exit, the first lens emits the first light incident from the second incident portion in a direction not incident on the second lens, The second light incident from the first incident portion is emitted in a direction not to be incident on the second lens, the first exit portion includes a first exit surface that collects the first light incident from the first entrance portion and outputs the first light to an outside of the first lens, the second exit portion includes a second exit surface that condenses the second light incident from the second entrance portion and outputs the second light to an outside of the first lens, the first exit surface reflects, inside the first lens, a first light other than that emitted from the second exit surface in a direction not entering the second lens, and a second light other than that emitted from the first exit surface in a direction not entering the second lens; The second exit surface reflects, inside the first lens, second light other than that emitted from the first exit surface in a direction not entering the second lens, and first light other than that emitted from the second exit surface in a direction not entering the second lens.

2. A first light source that emits a first light; a second light source disposed adjacent to the first light source and configured to emit a second light in the same direction as the first light; a projection optical system that projects the first light and the second light in the same direction; the projection optical system includes a first lens including a first entrance portion located on a side facing the first light source and for collimating a first light emitted from the first light source while entering the interior of the lens, a second entrance portion located on a side facing the second light source and for collimating a second light emitted from the second light source while entering the interior of the lens, a first exit portion located on the opposite side to the first entrance portion and for condensing the first light incident from the first entrance portion while exiting it to the outside, and a second exit portion located on the opposite side to the second entrance portion and for condensing the second light incident from the second entrance portion while exiting it to the outside; a second lens including a third incident portion located on a side opposite to the second incident portion and allowing the first light emitted from the first incident portion to enter into the lens, a fourth incident portion located on a side opposite to the first incident portion and allowing the second light emitted from the second incident portion to enter into the lens, a third incident portion located on an opposite side to the third incident portion and allowing the first light incident from the third incident portion to exit, and a fourth incident portion located on an opposite side to the fourth incident portion and allowing the second light incident from the fourth incident portion to exit, the first lens emits the first light incident from the second incident portion in a direction not incident on the second lens, The second light incident from the first incident portion is emitted in a direction not to be incident on the second lens, the first incident portion has a first light collecting entrance surface located in a portion facing the first light source and on which a portion of the first light emitted from the first light source is incident, a second light collecting entrance surface located on an inner peripheral side of a portion protruding from a position surrounding the periphery of the first light collecting entrance surface toward the first light source and on which a portion of the first light emitted from the first light source is incident, and a first light collecting reflection surface located on an outer peripheral side of the protruding portion and reflecting the first light incident from the second light collecting entrance surface, the second incident portion has a third light collecting entrance surface located in a portion facing the second light source and on which a portion of the second light emitted from the second light source is incident, a fourth light collecting entrance surface located on an inner peripheral side of a portion protruding from a position surrounding the periphery of the third light collecting entrance surface towards the second light source and on which a portion of the second light emitted from the second light source is incident, and a second light collecting reflection surface located on an outer peripheral side of the protruding portion and reflecting the second light incident from the fourth light collecting entrance surface, A vehicular lamp, wherein the first incident portion and the second incident portion partially overlap each other.

3. the first incident portion has a first light collecting entrance surface located in a portion facing the first light source and on which a portion of the first light emitted from the first light source is incident, a second light collecting entrance surface located on an inner peripheral side of a portion protruding from a position surrounding the periphery of the first light collecting entrance surface toward the first light source and on which a portion of the first light emitted from the first light source is incident, and a first light collecting reflection surface located on an outer peripheral side of the protruding portion and reflecting the first light incident from the second light collecting entrance surface, the second incident portion has a third light collecting entrance surface located in a portion facing the second light source and on which a portion of the second light emitted from the second light source is incident, a fourth light collecting entrance surface located on an inner peripheral side of a portion protruding from a position surrounding the periphery of the third light collecting entrance surface towards the second light source and on which a portion of the second light emitted from the second light source is incident, and a second light collecting reflection surface located on an outer peripheral side of the protruding portion and reflecting the second light incident from the fourth light collecting entrance surface, 2. The vehicular lamp according to claim 1, wherein the first incident portion and the second incident portion are partially overlapped with each other.

4. The vehicle lamp according to any one of claims 1 to 3, characterized in that a first light focused by the first exit portion and a second light focused by the second exit portion have mutually coincident focusing points located between the first lens and the second lens.

5. 5. The vehicular lamp according to claim 1, wherein the first light source and the second light source are provided on the same surface of the same substrate.

6. a heat sink thermally connected to the substrate, and a coupler-equipped socket including a connector portion electrically connected to the substrate; The vehicle lamp according to claim 5, characterized in that the coupler-equipped socket is detachably attached around an attachment hole provided on the rear side of the lamp housing the projection optical system in a state where the coupler-equipped socket is inserted into the inside of the lamp body through the attachment hole.

7. A first light source that emits a first light; a second light source disposed adjacent to the first light source and configured to emit a second light in the same direction as the first light; a projection optical system that projects the first light and the second light in the same direction; the projection optical system includes a first lens including a first entrance portion located on a side facing the first light source and for collimating a first light emitted from the first light source while entering the interior of the lens, a second entrance portion located on a side facing the second light source and for collimating a second light emitted from the second light source while entering the interior of the lens, a first exit portion located on the opposite side to the first entrance portion and for condensing the first light incident from the first entrance portion while exiting it to the outside, and a second exit portion located on the opposite side to the second entrance portion and for condensing the second light incident from the second entrance portion while exiting it to the outside; a second lens including a third incident portion located on a side opposite to the second incident portion and allowing the first light emitted from the first incident portion to enter into the lens, a fourth incident portion located on a side opposite to the first incident portion and allowing the second light emitted from the second incident portion to enter into the lens, a third incident portion located on an opposite side to the third incident portion and allowing the first light incident from the third incident portion to exit, and a fourth incident portion located on an opposite side to the fourth incident portion and allowing the second light incident from the fourth incident portion to exit, the first lens emits the first light incident from the second incident portion in a direction not incident on the second lens, The second light incident from the first incident portion is emitted in a direction not to be incident on the second lens, a first light projected by the projection optical system forms a first light distribution pattern including a cutoff line at an upper end thereof defined by a boundary between the third exit portion and the fourth exit portion; The second light projected by the projection optical system forms a second light distribution pattern located above the first light distribution pattern.

8. a first light projected by the projection optical system forms a first light distribution pattern including a cutoff line at an upper end thereof defined by a boundary between the third exit portion and the fourth exit portion; The vehicular lamp according to any one of claims 1 to 6, characterized in that the second light projected by the projection optical system forms a second light distribution pattern located above the first light distribution pattern.

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