Vehicle lamp

Abstract

In order to provide a vehicle lamp having a configuration for an appropriate light diffusion state, a vehicle lamp 1 comprises: a first lens 40 including an emission surface 41, and a projection lens 60 provided apart from a front side of the first lens 40. The emission surface 41 includes a first emission surface 41A that emits light in a direction of a first optical axis AX1, and a second emission surface 41B that emits light in a direction of a second optical axis AX2 and is adjacent to the first emission surface 41A. The second emission surface 41B is inclined toward the first emission surface 41A.

Description

Vehicle lighting device

[0001] The present invention relates to a vehicle lighting device.

[0002] Patent Document 1 discloses a vehicle lighting device including a low beam light source unit, a high beam light source unit, and a projection lens that projects the light of each light source unit to form a required light distribution. The vehicle lighting device includes a low beam lens unit that projects the light of the low beam light source unit to form a low beam light distribution, and a high beam lens unit that projects the light of the high beam light source unit to form a high beam light distribution, which are integrally formed. Different structures of each light source unit can be arranged, and the front surface of the projection lens is configured to have the same lens shape regardless of the difference in the light source unit.

[0003] In the vehicle lighting device of Patent Document 1, as a configuration on the high beam side, it includes a correction lens provided on the front side of a plurality of white LEDs and having one emission surface that protrudes forward in a curved shape, and a projection lens provided on the front side of the correction lens and including one incident surface that protrudes backward in a curved shape corresponding to the correction lens.

[0004] The projection lens has one surface that also protrudes forward in a curved shape at the emission surface. That is, in the projection lens of Patent Document 1, the portion corresponding to the correction lens has a biconvex lens structure.

[0005] The correction lens has one surface that also protrudes backward in a curved shape at the incident surface. That is, the correction lens of Patent Document 1 is a so-called biconvex lens.

[0006] On the other hand, Patent Document 2 describes a vehicle lamp comprising a light source and a projection lens, configured to project light emitted from the light source toward the front of the lamp via the projection lens, wherein a light guide is arranged between the light source and the projection lens to guide the light emitted from the light source and cause it to enter the projection lens, the light source comprises a first light source for forming a low beam light distribution pattern and a second light source for forming a high beam light distribution pattern by simultaneous illumination with the first light source, the second light source is composed of a plurality of second light-emitting elements arranged in a left-right direction below the first light source, the light guide comprises a first incident part for receiving light emitted from the first light source and a plurality of second incident parts for receiving light emitted from each of the plurality of second light-emitting elements, the light guide comprises a first emission surface for emitting light for the low beam light distribution pattern and a high beam light distribution pattern A vehicle light fixture is disclosed which includes a second emission surface that emits light for an additional light distribution pattern that is added to the low beam light distribution pattern when forming a turn, and a second incidence section which includes an incidence surface that causes light emitted from a second light-emitting element to be incident as light directed toward the second emission surface, a side incidence surface that causes light emitted from a second light-emitting element to be incident around the front incidence surface as light directed toward away from the front incidence surface, and a total reflection surface that causes light emitted from a second light-emitting element that has been incident from the side incidence surface to be totally reflected toward the second emission surface, and a second incidence section located at the left and right ends of a plurality of second incidence sections is configured to form a diffusion region of the additional light distribution pattern with reflected light from the reflection region on the left and right end side of the total reflection surface, and to form a central region of the additional light distribution pattern with reflected light from the reflection region on the left and right central side of the total reflection surface.

[0007] In the vehicle lighting device described in Patent Document 2, the low beam side configuration includes a plurality of first light-emitting elements, a first emission surface that is curved and recessed toward the rear and emits light from the first light-emitting elements, and a projection lens provided on the front side of the first emission surface, the projection lens being a biconvex lens.

[0008] Japanese Patent Publication No. 2024-49456 Japanese Patent Publication No. 2023-66000

[0009] Furthermore, in the configuration of Patent Document 1, the projection lens portion corresponding to the auxiliary lens has a biconvex lens structure and therefore has one back focus, and the auxiliary lens also has one back focus, which results in a problem of low freedom in superimposing light from multiple white LEDs.

[0010] Therefore, the first objective is to provide a vehicle lighting device equipped with a configuration for appropriate light superposition.

[0011] Furthermore, in the configuration of Patent Document 2, since the first emission surface is formed as a single curved concave surface that is recessed towards the rear, there is a problem that the degree of freedom of the diffusion state from the multiple first light-emitting elements is low.

[0012] Therefore, from another perspective, the objective is to provide a vehicle lighting device equipped with a configuration for appropriate light diffusion.

[0013] To achieve the above objective, the present invention is understood to have the following configuration. The vehicle light fixture of the present invention comprises a first lens having an emission surface, and a projection lens provided spaced apart in front of the first lens, wherein the emission surface includes a first emission surface that emits light in the direction of a first optical axis, and a second emission surface adjacent to the first emission surface that emits light in the direction of a second optical axis, and the second emission surface is inclined toward the first emission surface.

[0014] According to the present invention, in one aspect, a vehicle light fixture is provided that has a configuration for appropriate light diffusion.

[0015] This is a top view showing a vehicle equipped with a vehicle lamp according to an embodiment of the present invention. This is a perspective view of a vehicle lamp according to an embodiment of the present invention. This is an exploded perspective view of a vehicle lamp according to an embodiment of the present invention. This is a view of the first holder according to an embodiment of the present invention, seen from the front. This is a cross-sectional view mainly showing the inner first lens and projection lens according to an embodiment of the present invention. This is a diagram showing the overlap of the light distribution patterns on a screen caused by light from the light-emitting part according to an embodiment of the present invention. This is a diagram showing the light distribution pattern on a screen caused by light from the light-emitting part according to an embodiment of the present invention. This is a cross-sectional view mainly showing the outer first lens and projection lens according to an embodiment of the present invention. This is a perspective view of the outer first lens according to an embodiment of the present invention, seen from the rear diagonal upper side. This is a perspective view of the outer first lens according to an embodiment of the present invention, seen from the front diagonal lower side. This is a diagram showing the low beam light distribution pattern on a screen caused by light from the light-emitting part according to an embodiment of the present invention. This is the light distribution pattern on a screen caused by light reflected from a plurality of divided reflective surfaces according to an embodiment of the present invention. This is the light distribution pattern on a screen when the front reflective part located on the other side (outside) is an undivided surface instead of a divided reflective surface, as a comparative example.

[0016] Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as "embodiments") will be described in detail with reference to the attached drawings. Throughout the description of the embodiments, the same elements are denoted by the same numbers or reference numerals.

[0017] However, please note that, for the sake of readability in the drawings, not all identical elements are assigned numbers or symbols.

[0018] Additionally, some parts of the illustration emphasize the structure to make the explanation easier to understand, and dimensions and other details may differ from reality.

[0019] <<Embodiment>> An embodiment of the vehicle lighting device 1 according to the present invention will be described with reference to Figures 1 to 13.

[0020] Figure 1 is a top view showing a vehicle C equipped with a vehicle lighting device 1 according to an embodiment of the present invention. As shown in Figure 1, the vehicle lighting device 1 of this embodiment is a so-called headlight, which is installed on the front side of the vehicle C.

[0021] In the following description of vehicle lighting fixture 1, when installed on vehicle C, the side closer to the center line in the width direction of vehicle C (see dashed line) is referred to as one side (inner), and the side further away from the center line is referred to as the other side (outer).

[0022] Furthermore, the following explanation will use the vehicle light fixture 1 installed on the right side of vehicle C as an example when viewed from the driver's seat. However, since the left and right vehicle light fixtures 1 differ only in that they have a symmetrical configuration, the explanations below regarding one side and the other side are the same for the vehicle light fixture 1 installed on the left side of vehicle C.

[0023] Figure 2 is a perspective view of a vehicle lamp 1 according to an embodiment of the present invention, and Figure 3 is an exploded perspective view of a vehicle lamp 1 according to an embodiment of the present invention. As shown in Figure 3, the vehicle lamp 1 comprises a base portion 10, a light source portion 20 attached to the base portion 10, an inner first lens 30 provided in front of the light irradiation direction of the light source portion 20 (also simply called the front) and positioned on one side, and an outer first lens 40 provided in front of the light source portion 20 and positioned on the other side.

[0024] Furthermore, the vehicle light fixture 1 includes a first holder 50 that is screw-fixed to the base portion 10 and holds an inner first lens 30 and an outer first lens 40, a projection lens 60 that is spaced apart in front of the inner first lens 30 and the outer first lens 40, and a second holder 70 that is screw-fixed to the first holder 50 and holds the projection lens 60.

[0025] (Base section 10) The base section 10 comprises a main body section 11 and a plurality of heat dissipation fins 12. The main body section 11 comprises a flat mounting plate 11A on which the light source section 20 is placed on the surface side, and a pair of side plates 11B extending forward from one end and the other end of the mounting plate 11A.

[0026] Multiple heat dissipation fins 12 are provided, extending vertically and rearward from the back surface of the mounting plate 11A, and spaced apart from one side to the other.

[0027] For example, the main body 11 and the heat dissipation fins 12 may be formed using aluminum or other materials with good thermal conductivity.

[0028] (Light source unit 20) The light source unit 20 comprises a single substrate 21, a plurality of LED chips serving as light-emitting units 22 located on the substrate 21 at positions corresponding to the inner first lens 30, and a plurality of LED chips serving as light-emitting units 23 located on the substrate 21 at positions corresponding to the outer first lens 40.

[0029] In this embodiment, four LED chips serving as light-emitting units 22 are provided on the substrate 21, and although partially hidden by the other side plate 11B in Figure 3, five LED chips serving as light-emitting units 23 are provided on the substrate 21.

[0030] (Inner first lens 30) The inner first lens 30 has an inner emitting surface 31 that emits light corresponding to the high beam light distribution pattern, and its relationship with the projection lens 60 will be explained in detail later.

[0031] (Outer first lens 40) The outer first lens 40 has an outer emission surface 41 that emits light corresponding to the low beam light distribution pattern, and its relationship with the projection lens 60 will be explained in detail later.

[0032] (First Holder 50) Figure 4 is a view of the first holder 50 of an embodiment according to the present invention, as seen from the front. As shown in Figure 4, the first holder 50 includes an inner opening 51 provided on one side, corresponding to the inner emission surface 31 (not shown) of the inner first lens 30 (not shown), and an outer opening 52 provided on the other side, corresponding to the outer emission surface 41 of the outer first lens 40.

[0033] Then, the first holder 50 is screw-fixed to the base portion 10 as described above, with the inner first lens 30 (not shown) mounted so that the inner exit surface 31 (not shown) corresponds to the inner opening 51, and the outer first lens 40 mounted so that the outer exit surface 41 corresponds to the outer opening 52.

[0034] In other words, the first holder 50 is a holder for receiving the inner first lens 30 (not shown) and the outer first lens 40.

[0035] (Projection lens 60) The projection lens 60 is a lens in which the parts corresponding to the inner first lens 30 (not shown) and the outer first lens 40 are integrally formed. Details, including the relationship with the inner first lens 30 (not shown) and the outer first lens 40, will be explained later.

[0036] The projection lens 60 may be separated into two projection lenses: an inner projection lens consisting of a portion corresponding to the inner first lens 30 (not shown), and an outer projection lens consisting of a portion corresponding to the outer first lens 40.

[0037] In this case, the configuration of the projection lens 60 corresponding to the inner first lens 30 (not shown), which will be described below, should be provided on the inner projection lens, and the configuration of the projection lens 60 corresponding to the outer first lens 40 should be provided on the outer projection lens.

[0038] (Second holder 70) As shown in Figure 3, the second holder 70 has an opening 71 into which the projection lens 60 is inserted. After the projection lens 60 is inserted into the opening 71 (see Figure 2), the second holder 70 is screw-fixed to the first holder 50 as described earlier.

[0039] Next, we will explain the configuration for achieving appropriate light superposition while describing the high beam light distribution. Note that if a similar configuration is applicable, the configuration described below may also be used to form light distributions other than high beam distributions.

[0040] Figure 5 is a cross-sectional view mainly showing the inner first lens 30 and projection lens 60 of an embodiment according to the present invention.

[0041] Note that while Figure 5 shows the state of light rays with arrows, it represents only a small fraction of the light rays necessary for explanation, and there are actually many more light rays.

[0042] Furthermore, in Figure 5, for the sake of clarity, some parts of the inner first lens 30 and the projection lens 60 have been omitted from the illustration.

[0043] As shown in Fig. 5, the inner exit surface 31 of the inner first lens 30 includes an inner first exit surface 31A provided on one side and an inner second exit surface 31B provided on the other side and adjacent to the inner first exit surface 31A. In Fig. 5, the inner first exit surface 31A and the inner second exit surface 31B are arranged side by side inside and outside (left and right), but they may also be arranged side by side vertically. That is, the inner first exit surface 31A and the inner second exit surface 31B do not necessarily have to be arranged side by side in the horizontal direction and may be arranged side by side in the vertical direction.

[0044] On the other hand, the projection lens 60 is provided at a distance in front of the inner first lens 30 and has an inner entrance surface 61 corresponding to the inner first lens 30.

[0045] The inner entrance surface 61 includes an inner first entrance surface 61A provided on one side and an inner second entrance surface 61B provided on the other side and adjacent to the inner first entrance surface 61A. The boundary between the inner first entrance surface 61A and the inner second entrance surface 61B is at a position that projects the boundary between the inner first exit surface 31A and the inner second exit surface 31B to the front side as indicated by the dashed line.

[0046] As can be seen from Fig. 5, the inner first entrance surface 61A is mainly the entrance surface for light incident from the inner first exit surface 31A, and the inner second entrance surface 61B is mainly the entrance surface for light incident from the inner second exit surface 31B.

[0047] However, a part of the light from the inner second exit surface 31B is incident near the part of the inner first entrance surface 61A adjacent to the inner second entrance surface 61B, and a part of the light from the inner first exit surface 31A is incident near the part of the inner second entrance surface 61B adjacent to the inner first entrance surface 61A.

[0048] The inner first entrance surface 61A is inclined rearward from the other side toward the one side, and the inner second entrance surface 61B is inclined rearward from the one side toward the other side, so that the part of the projection lens 60 corresponding to the inner first lens 30 does not have a clear rear focal point.

[0049] Therefore, since light from the inner first emission surface 31A and the light from the inner second emission surface 31B are incident on the projection lens 60 while maintaining a good overlap, it is possible to suitably form areas that are desired to be formed by the overlap of light distribution, such as hot zones required for high beam light distribution patterns.

[0050] Furthermore, if there is a clear back focus, the design will concentrate the light there, which may result in some light not being utilized effectively. However, as mentioned above, by not having a clear back focus, the inner exit surface 31 can be designed primarily to irradiate the inner incident surface 61 with light, thereby improving the efficiency of light utilization.

[0051] Furthermore, since the inner first emission surface 31A is located in front of the inner second emission surface 31B and is clearly separated, individual surface design can be performed, further increasing the degree of freedom in light distribution design and enabling the formation of an even more appropriate overlap of light distribution. Alternatively, the inner first emission surface 31A may be located behind the inner second emission surface 31B and clearly separated.

[0052] Furthermore, the inner first ejection surface 31A includes an inner first other-side curved surface 31A1 provided on the other side, which curves toward the rear toward the boundary between the inner first ejection surface 31A and the inner second ejection surface 31B, and the inner second ejection surface 31B includes an inner second one-side curved surface 31B1 provided on one side, which curves toward the rear toward the boundary between the inner first ejection surface 31A and the inner second ejection surface 31B.

[0053] By providing such an inner first other-side curved surface 31A1 and an inner second one-side curved surface 31B1, as shown in Figure 5, light from the inner first other-side curved surface 31A1 is directed toward the inner first incident surface 61A, suppressing stray light toward the inner second incident surface 61B. Similarly, light from the inner second one-side curved surface 31B1 is directed toward the inner second incident surface 61B, suppressing stray light toward the inner first exit surface 31A.

[0054] In this embodiment, as shown in Figure 5, the vehicle light fixture 1 includes two light-emitting units 22 that emit light corresponding to the inner first emission surface 31A, and two light-emitting units 22 that emit light corresponding to the inner second emission surface 31B.

[0055] However, the number of light-emitting units 22 to be provided can be determined by the required luminous intensity, and therefore the vehicle lamp 1 may include one or more light-emitting units 22 that emit light corresponding to the inner first emission surface 31A, and one or more light-emitting units 22 that emit light corresponding to the inner second emission surface 31B.

[0056] Figure 6 shows the overlapping of light distribution patterns on a screen caused by light from the light-emitting unit 22 in an embodiment of the present invention. In Figure 6, the light distribution patterns formed by the light from each light-emitting unit 22 are shown as HP1, HP2, HP3, and HP4, sequentially from one side to the other in Figure 5.

[0057] Figure 7 shows the high-beam light distribution pattern on the screen caused by light from the light-emitting unit 22 of an embodiment of the present invention, and the state of the high-beam light distribution pattern is indicated by isophoton lines.

[0058] As shown in Figure 6, the light distribution pattern overlaps well near the center where the vertical reference line V and the horizontal reference line H intersect. As a result, as shown in Figure 7, a good hot zone with high luminosity is formed near the center where the vertical reference line V and the horizontal reference line H intersect.

[0059] Next, we will explain the configuration for achieving an appropriate light diffusion state while describing the low-beam light distribution. Note that if a similar configuration is applicable, the configuration described below may also be applied to form light distributions other than the low-beam distribution.

[0060] Figure 8 is a cross-sectional view mainly showing the outer first lens 40 and projection lens 60 of an embodiment according to the present invention. As shown in Figure 8, the outer emission surface 41 of the outer first lens 40 includes an outer first emission surface 41A that curves to protrude, an outer second emission surface 41B adjacent to one side of the outer first emission surface 41A and curves to protrude, and an outer third emission surface 41C adjacent to the other side of the outer first emission surface 41A so as to sandwich the outer first emission surface 41A between the outer second emission surface 41B and curves to protrude.

[0061] The outer first lens 40 has a first rear focus BF1 corresponding to the outer first emission surface 41A, a second rear focus BF2 corresponding to the outer second emission surface 41B, and a third rear focus BF3 corresponding to the outer third emission surface 41C.

[0062] Therefore, the outer first emission surface 41A emits light in the direction of the first optical axis AX1, the outer second emission surface 41B emits light in the direction of the second optical axis AX2, and the outer third emission surface 41C emits light in the direction of the third optical axis AX3.

[0063] Furthermore, the outer second emission surface 41B is inclined toward the outer first emission surface 41A such that the second optical axis AX2 intersects the first optical axis AX1 in front of the projection lens 60, and the outer third emission surface 41C is inclined toward the outer first emission surface 41A such that the third optical axis AX3 intersects the first optical axis AX1 and the second optical axis AX2 in front of the projection lens 60.

[0064] Therefore, the light from the outer second emission surface 41B and the light from the outer third emission surface 41C are irradiated in a cross-beam state.

[0065] Furthermore, by adjusting the inclination of the outer second emission surface 41B and the outer third emission surface 41C, the state of cross-beam irradiation can be adjusted, thereby forming an appropriate diffuse light distribution.

[0066] Furthermore, in this embodiment, the central positions of both the outer second emission surface 41B and the outer third emission surface 41C (the position where the outer second emission surface 41B intersects with the second optical axis AX2, and the position where the outer third emission surface 41C intersects with the third optical axis AX3) are located forward of the central position of the outer first emission surface 41A (the position where the outer first emission surface 41A intersects with the first optical axis AX1).

[0067] In other words, since the outer second emission surface 41B and the outer third emission surface 41C are located in front of the outer first emission surface 41A, there is no step or side wall between the outer second emission surface 41B and the outer third emission surface 41C and the outer first emission surface 41A. This prevents light from hitting the step and becoming stray light, which can occur if there is a step, and thus improves the efficiency of light utilization.

[0068] Figure 9 is a perspective view of the outer first lens 40 of an embodiment according to the present invention, viewed from the rear and obliquely above. Figure 9 also shows five LEDs, which are multiple light-emitting units 23 provided in conjunction with the outer first lens 40.

[0069] Figure 10 is a perspective view of the outer first lens 40 of an embodiment according to the present invention, viewed from the front, side, and diagonally downward side. Figure 11 is a diagram showing the low beam light distribution pattern on the screen caused by light from the light-emitting unit 23 of an embodiment according to the present invention.

[0070] As will be explained in more detail later, the light from the light-emitting section 23 is reflected back towards the outer emission surface 41 by the rearward reflecting surface RF1 on the rear side of the outer emission surface 41 shown in Figure 9. As shown in Figure 9, an elbow E that forms the cutoff line of the low beam light distribution pattern is provided below the center of the rearward reflecting surface RF1, and the outer first emission surface 41A is the emission surface corresponding to the elbow E that forms the cutoff line.

[0071] As shown in Figure 10, the outer first lens 40 is equipped with an overhead light distribution surface 42 for overhead light distribution, which is provided adjacent to the lower side of the portion corresponding to the outer first light emission surface 41A.

[0072] More specifically, the overhead discharge surface 42 corresponds to the entire outer first discharge surface 41A and is provided adjacent to the lower side of the outer first discharge surface 41A. Note that, as in this embodiment, the overhead discharge surface 42 may be provided across the entire lower side of the outer first discharge surface 41A, or it may be provided only partially on the lower side of the outer first discharge surface 41A.

[0073] In this embodiment, as shown in Figure 10, the overhead ejection surface 42 is formed by a plurality of divided surfaces 42A.

[0074] Then, on each dividing surface 42A, multiple low-intensity light distribution patterns that will become overhead light distribution are formed in this manner, and these light distribution patterns are superimposed on the screen to obtain the necessary luminous intensity for the overhead light distribution pattern OVH, as shown in Figure 11, and to ensure uniformity of the luminous intensity within the overhead light distribution pattern OVH. Also, as shown in Figure 11, the outer first emission surface 41A mainly forms the lower light distribution pattern LP1 on the central side (overhead light distribution pattern OVH) of the low beam light distribution pattern, the outer second emission surface 41B mainly forms the outer light distribution pattern LP2 of the low beam light distribution pattern, and the outer third emission surface 41C mainly forms the inner light distribution pattern LP3 of the low beam light distribution pattern.

[0075] On the other hand, as shown in Figure 10, the vehicle light fixture 1 is integrally provided with the light guide member that constitutes the outer first lens 40, and is located on the optical path from the light-emitting part 23 (see Figure 9) to the outer emission surface 41. It comprises a plurality of forward reflecting parts 43 provided on the front side of each light-emitting part 23, corresponding to each light-emitting part 23, and a plurality of light-diffusing parts 44 provided adjacent to the forward reflecting part 43 in the light reflection direction (upper side in Figure 10), corresponding to each light-emitting part 23.

[0076] In this embodiment, the light diffusion portion 44 is formed by knurling, in which linear recesses extending in the light reflection direction are arranged adjacently from one side to the other.

[0077] By providing such a light-diffusing section 44, light that could potentially cause glare can be diffused, thereby suppressing glare.

[0078] The forward reflective section 43 located on the other side (outside) is formed of multiple segmented reflective surfaces 43A, and by controlling the light distribution, it is designed to intensify the light near the horizontal reference line H on the screen, as will be described later.

[0079] Figure 12 shows the light distribution pattern on the screen caused by light reflected by a plurality of segmented reflective surfaces 43A in an embodiment of the present invention.

[0080] Figure 13 shows the light distribution pattern on the screen when the forward reflective portion 43 located on the other side (outside) is an undivided surface instead of a divided reflective surface 43A, as a comparative example.

[0081] As can be seen in Figures 12 and 11, the light distribution formed by the multiple segmented reflective surfaces 43A is mainly the portion of the low beam light distribution pattern to the left of the vertical reference line V, facing the screen.

[0082] As can be seen by comparing Figure 12 and Figure 13, the light distribution pattern reflected by the multiple divided reflective surfaces 43A (see Figure 12) has a slightly smaller light distribution range than the light distribution pattern when the surfaces are not divided (see Figure 13), and the luminous intensity is higher closer to the horizontal reference line H.

[0083] Therefore, the low beam light distribution pattern also yields a good pattern with strong light near the horizontal reference line H.

[0084] Although the present invention has been described above based on specific embodiments, the present invention is not limited to the above embodiments.

[0085] For example, in the above embodiment, the inner exit surface 31 has two exit surfaces (inner first exit surface 31A and inner second exit surface 31B), and the inner incident surface 61 corresponding to the inner first lens 30 has correspondingly two incident surfaces (inner first incident surface 61A and inner second incident surface 61B).

[0086] However, the inner exit surface 31 may have three or more exit surfaces, and the inner incident surface 61 corresponding to the inner first lens 30 may also have three or more incident surfaces.

[0087] Furthermore, although the above embodiment shows a case where the outer emission surface 41 includes the outer third emission surface 41C, in the case of light directed toward one side (inward), it is less likely to deviate from the projection lens 60, and the outer first emission surface 41A may be extended to cover the range of the outer third emission surface 41C, thereby omitting the outer third emission surface 41C.

[0088] Furthermore, in the above embodiment, one side (inner) had a configuration related to the high beam light distribution pattern, and the other side (outer) had a configuration related to the low beam light distribution pattern. However, the other side (outer) may have a configuration related to the high beam light distribution pattern, and one side (inner) may have a configuration related to the low beam light distribution pattern. In this case, the only difference is that "inner" is read as "outer" and "outer" is read as "inner".

[0089] Thus, the present invention also includes modifications and improvements to the above embodiments, which will be clear to those skilled in the art from the claims.

[0090] Furthermore, with respect to the above embodiments, the following additional information is disclosed with regard to providing a vehicle lighting device 1 equipped with a configuration for appropriate light superposition. The numbers and reference numerals correspond to the numbers and reference numerals used in the description of the embodiments. [Note 1] A vehicle light fixture 1 comprises: a first lens 30 having an emission surface 31; a projection lens 60 spaced apart in front of the first lens 30 and having an incidence surface 61; the emission surface 31 includes a first emission surface 31A provided on one side; and a second emission surface 31B provided on the other side and adjacent to the first emission surface 31A; the incidence surface 61 includes a first incidence surface 61A provided on one side; and a second incidence surface 61B provided on the other side and adjacent to the first incidence surface 61A; the first incidence surface 61A is inclined towards the rear from the other side toward the one side; the second incidence surface 61B is inclined towards the rear from the one side toward the other side; and the first incidence surface 61A is the incidence surface into which light mainly enters from the first emission surface 31A. A vehicle lamp characterized in that the second incident surface 61B is an incident surface into which light mainly enters from the second exit surface 31B. [Note 2] The vehicle lamp according to Note 1, characterized in that the boundary between the first incident surface 61A and the second incident surface 61B is located at a position approximately the boundary between the first exit surface 31A and the second exit surface 31B projected forward. [Note 3] The vehicle lamp according to Note 1 or Note 2, characterized in that the vehicle lamp 1 comprises one or more light-emitting parts 22 provided corresponding to the first exit surface 31A and emitting light, and one or more light-emitting parts 22 provided corresponding to the second exit surface 31B and emitting light. [Note 4] The vehicle light fixture according to any one of Notes 1 to 4, characterized in that the first emission surface 31A includes a first other-side curved surface 31A1 provided on the other side and curving toward the rear toward the boundary between the first emission surface 31A and the second emission surface 31B, and the second emission surface 31B includes a second one-side curved surface 31B1 provided on one side and curving toward the rear toward the boundary between the first emission surface 31A and the second emission surface 31B.[Note 5] The vehicle light fixture according to any one of Notes 1 to 4, characterized in that the first emission surface 31A is located in front of or behind the second emission surface 31B.

[0091] Furthermore, with respect to the above embodiments, the following additional notes are disclosed in view of providing a vehicle lamp 1 equipped with a configuration for appropriate light diffusion. Note that the numbers and reference numerals correspond to the numbers and reference numerals used in the description of the embodiments. [Addendum 1] A vehicle lamp 1 comprising: a first lens 40 having an emission surface 41; and a projection lens 60 spaced apart in front of the first lens 40; wherein the emission surface 41 includes: a first emission surface 41A that irradiates light in the direction of a first optical axis AX1; and a second emission surface 41B that irradiates light in the direction of a second optical axis AX2 and is adjacent to the first emission surface 41A; and the second emission surface 41B is inclined toward the first emission surface 41A. [Note 2] The vehicle lamp according to Note 1, wherein the emission surface 41 irradiates light in the direction of the third optical axis AX3 and includes a third emission surface 41C adjacent to the first emission surface 41A so as to sandwich the first emission surface 41A between the second emission surface 41B and the third emission surface 41C, the third emission surface 41C is inclined toward the first emission surface 41A, and the third optical axis AX3 intersects the first optical axis AX1 and the second optical axis AX2 in front of the projection lens 60. [Note 3] The vehicle lamp according to Note 2, wherein the center positions of both the second emission surface 41B and the third emission surface 41C are located in front of the center position of the first emission surface 41A. [Note 4] The vehicle lamp according to Note 1, characterized in that the first lens 40 includes an overhead light distribution surface 42 provided adjacent to the lower side of the portion of the first light output surface 41A corresponding to the elbow E that forms the cutoff line, and the overhead light output surface 42 is formed of a plurality of dividing surfaces 42A. [Note 5] The vehicle lamp according to Note 4, characterized in that the light output surface 41 irradiates light in the direction of the third optical axis AX3 and includes a third light output surface 41C adjacent to the first light output surface 41A so as to sandwich the first light output surface 41A with the second light output surface 41B, and the overhead light output surface 42 is provided adjacent to the lower side of the first light output surface 41A corresponding to the entire first light output surface 41A.[Note 6] The vehicle lamp 1 is characterized in that it comprises a plurality of light-emitting parts 23 that emit light, and a plurality of reflecting parts 43 located on the optical path from the light-emitting parts 23 to the emission surface 41, and provided corresponding to each of the light-emitting parts 23, wherein the reflecting parts 43 located on the outside are formed of a plurality of divided reflecting surfaces 43A. [Note 7] The vehicle lamp is characterized in that it comprises a plurality of light-diffusing parts 44 provided adjacent to each of the light-emitting parts 23 on the side of the reflecting part 43 in the light reflection direction. [Note 8] The vehicle lamp is characterized in that the second optical axis AX2 intersects the first optical axis AX1 in front of the projection lens 60.

[0092] 1... Vehicle lighting fixture, 10... Base part, 11... Main body part, 11A... Mounting plate, 11B... Side plate, 12... Heat dissipation fin, 20... Light source part, 21... Substrate, 22, 23... Light emitting part, 30... Inner first lens, 31... Inner emission surface, 31A... Inner first emission surface, 31A1... Inner first other side curved surface, 31B... Inner second emission surface, 31B1... Inner second one side curved surface, 40... Outer first lens, 41... Outer emission surface, 41A... Outer first emission surface, 41B... Outer second emission surface, 41C... Outer third emission surface, 42 ...Overhead emission surface, 42A...Divided surface, 43...Forward reflecting surface, 43A...Divided reflecting surface, 44...Light diffusion surface, 50...First holder, 51...Inner opening, 52...Outer opening, 60...Projection lens, 61...Inner incident surface, 61A...Inner first incident surface, 61B...Inner second incident surface, 70...Second holder, 71...Opening, AX1...First optical axis, AX2...Second optical axis, AX3...Third optical axis, BF1...First rear focus, BF2...Second rear focus, BF3...Third rear focus, C...Vehicle, RF1...Rear reflecting surface

Claims

1. A vehicle light fixture comprising: a first lens having an emission surface; and a projection lens provided spaced in front of the first lens, wherein the emission surface includes a first emission surface that emits light in the direction of a first optical axis; and a second emission surface adjacent to the first emission surface that emits light in the direction of a second optical axis, and the second emission surface is inclined toward the first emission surface.

2. The vehicle lamp according to claim 1, characterized in that the emitting surface irradiates light in the direction of the third optical axis, includes a third emitting surface adjacent to the first emitting surface so as to sandwich the first emitting surface between the second emitting surface and the third emitting surface, the third emitting surface is inclined toward the first emitting surface, and the third optical axis intersects the first optical axis and the second optical axis in front of the projection lens.

3. The vehicle light fixture according to claim 2, characterized in that the center positions of both the second emission surface and the third emission surface are located forward of the center position of the first emission surface.

4. The vehicle lamp according to claim 1, wherein the first lens includes an overhead light distribution surface provided adjacent to the lower side of the portion of the first light-emitting surface corresponding to the elbow forming the cutoff line, and the overhead light-emitting surface is formed of a plurality of divided surfaces.

5. The vehicle lamp according to claim 4, characterized in that the emission surface emits light in the direction of the third optical axis and includes a third emission surface adjacent to the first emission surface so as to sandwich the first emission surface between the second emission surface and the third emission surface, and the overhead emission surface is provided adjacent to the lower side of the first emission surface, corresponding to the entirety of the first emission surface.

6. The vehicle lamp according to claim 1, comprising: a plurality of light-emitting parts that emit light; a plurality of reflecting parts located on the optical path from the light-emitting parts to the emission surface and corresponding to each of the light-emitting parts, wherein the reflecting parts located on the outside are formed of a plurality of segmented reflecting surfaces.

7. The vehicle lamp according to claim 6, characterized in that it comprises a plurality of light-diffusing parts provided adjacent to each of the light-emitting parts on the side of the reflective part in the light reflection direction.

8. The vehicle lamp according to claim 1, characterized in that the second optical axis intersects the first optical axis in front of the projection lens.

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