Vehicle lamp

Abstract

The vehicle lamp includes: a light source (13); and a light guide (20) that guides light emitted from the light source toward the front of the lamp. The light guide body (20) has a semi-ring-shaped first light guide section (21) centered on the light emission section of the light source (13), and a second light guide section (22) disposed at a position separated from the first light guide section. The second light guide part (22) is provided with a semi-ring-shaped base part (23) and a plurality of light guide paths (24) which protrude in the direction away from the base part (23) and are provided with light-emitting parts in the front end area, and the light-emitting parts (15) are formed in a manner of being separated in the left-right direction. The side surface of the light source side of the first light guide part enables light entering the light guide body (20) from the light source to become parallel light rays in the direction perpendicular to the first direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle lamp such as an illuminator and a sign device used in a vehicle such as an automobile or a two-wheeled vehicle.

[0002] This application claims priority based on Japanese Patent Application No. 2023-093748 filed on June 7, 2023, the content of which is incorporated herein. BACKGROUND

[0003] A vehicle lamp is known which is configured to use an LED as a light source, and to cause light emitted from the LED to be incident on a light guide body and emitted from an emission surface of the light guide body toward the front of the lamp. For example, in the LED signal lamp of Patent Literature 1, there are provided an LED mounted on a substrate and a plurality of plate-shaped light guide bodies arranged in a direction perpendicular to the optical axis of the LED. The incident surface of each of the plurality of light guide bodies is an end surface of the plate-shaped light guide body, and opposes the LED. It is disclosed that the loss of the amount of light in the light guide body is reduced by providing each incident surface in a shape that condenses the light emitted from the LED on the light emission surface of each light guide body.

[0004] In addition, in the vehicle lamp of Patent Literature 2, there are provided a plurality of LEDs arranged in a column and a light guide body provided along the direction in which the LEDs are arranged. The light guide body is composed of a plurality of back surface protrusions provided on the side opposite the LEDs, a plurality of surface protrusions provided corresponding to the back surface protrusions, and a base portion 22 that links them, and light emitted from the plurality of LEDs is incident on and guided from the incident surfaces provided respectively on the plurality of back surface protrusions, and emitted from a plurality of surfaces of the surface protrusions on the opposite side that are continuous in the circumferential direction. In addition, a part of the light is also emitted from the base portion between the plurality of surface protrusions. The surface protrusions form a polyhedral structure, and the light is multiply reflected by the polyhedron, whereby a gem-like luster and a three-dimensional surface emission are achieved. In addition, it is described that, in order to be able to achieve regular and uniform emission with a smaller number of light sources than when the LEDs as light sources and the back surface protrusions are provided in the same number and in one-to-one correspondence, the gem-like luster can be further enhanced by providing two surface protrusions with respect to one light source.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] Patent Literature 1: Japanese Patent Application Publication No. 2015-207476

[0008] Patent Literature 2: Japanese Patent Application Publication No. 2016-062844 SUMMARY

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] In the LED signal lamp described in the above-described Patent Document 1, a cut portion is formed in an incident surface of each plate-shaped light guide body to perform light distribution control so that light is condensed toward a light exit surface of the light guide body at a position opposite to each incident surface, and thus it is possible to suppress loss of light within each light guide body. However, since light must be condensed in a manner that it linearly advances within each light guide body toward the light exit surface, the cut portion provided in the incident surface must be shaped so as to linearly connect the incident surface and the light exit surface of each light guide body. Therefore, in order to arrange in a manner that a bright light exit surface is obtained, each LED and each light guide body must be in a prescribed positional relationship, and there is a problem in that freedom of design of the vehicle lamp is lacking. In addition, when the number of LEDs is increased in order to make the light exit surface brighter, the incident angles of light incident to each light guide body are different, and thus it is difficult to make the light exit surface bright even if the number of LEDs is simply increased.

[0011] In the vehicle lamp described in the above-described Patent Document 2, the surface protrusion is in a polyhedral configuration, and a gem-like brilliance and a three-dimensional surface emission are achieved by multiple reflection by the polyhedron. However, although a three-dimensional effect is obtained, the entire surface of the light exit surface side of the light guide body emits light. There is a problem in that it is difficult to strongly emit light in a manner that emission from the front end of the surface protrusion is conspicuous.

[0012] The present application provides a vehicle lamp having a light source and a light guide body, which can improve the degree of freedom of three-dimensional shape of the vehicle lamp, and can arrange a plurality of light exit portions and improve contrast between the light exit portions. In addition, a vehicle lamp that can improve the utilization efficiency of light is provided.

[0013] Means for solving the problem

[0014] The present application provides the above-described vehicle lamp by taking measures for a first light guide portion and a second light guide portion.

[0015] One embodiment of the present application is [1]: a vehicle lamp having: a light source; and a light guide body that guides exit light from the light source toward a front of the lamp,

[0016] The light guide body has: a first light guide portion in a semicircular shape centered on a light exit portion of the light source; and a second light guide portion disposed at a position farther from the light exit portion than the first light guide portion,

[0017] The first light guide portion has: a first light entrance side surface which is located at a position apart from the light exit portion, diffuse light emitted from the light exit portion is incident on the first light entrance side surface, and the first light entrance side surface takes a circular arc centered on the light exit portion as a motif; and a first light exit side surface which is located on the opposite side of the first light entrance side surface, takes a circular arc concentric with the circular arc of the first light entrance side surface as a motif, and has a first light exit surface on the first light exit side surface, the first light exit surface being for light which has been incident on the first light entrance side surface and guided within the first light guide portion to exit,

[0018] The second light guide portion has: a second light entrance side surface which is located opposite the first light exit side surface, takes a circular arc concentric with the circular arc of the first light entrance side surface as a motif; a second light exit side surface which is formed on the opposite side of the second light entrance side surface, and is substantially parallel to the first light exit side surface; and a plurality of light guide paths which protrude from the second light exit side surface in a direction away from the light exit portion, and have light emitting portions in the front end regions,

[0019] The plurality of light guide paths are arranged in such a manner that the light emitting portions are arranged separately in the first direction,

[0020] A second light entrance surface is formed on the second light entrance side surface corresponding to the base end portions of the plurality of light guide paths, the second light entrance surface causes light which has exited from the first light exit surface to be incident on the second light guide portion,

[0021] The first light exit surface is a refractive surface which condenses light from the light source which has been incident on the first light entrance side surface toward the second light entrance surface, is formed at a position which opposes the second light entrance surface in a manner corresponding to the second light entrance surface, and the second light entrance surface is formed as a substantially planar surface which is perpendicular to the central axis of light which has exited from the first light exit surface.

[0022] According to the above-described invention, it is possible to form a light emitting surface in a three-dimensional shape, and it is possible to improve the degree of freedom of design of a vehicle lamp. In addition, it is possible to use a light source which uses a plurality of LED elements, and it is possible to improve the light intensity of light which exits from the light emitting surface. Furthermore, it is possible to obtain a light emitting surface which has a plurality of light exit portions and a light-dark contrast between the light exit portions in the light emitting surface. Thus, it is possible to further improve the visual recognition of the vehicle lamp. In addition, the size of the light source, and the degree of freedom of alignment of the light source with respect to the light guide body are improved, and thus it is difficult to cause defects when manufacturing the vehicle lamp, and it is possible to contribute to a reduction in the cost of the vehicle lamp.

[0023] Other modes of the present application are [2]: The vehicle lamp according to [1], characterized in that the first light guide portion and the second light guide portion are joined in a plane perpendicular to the first direction, and an air layer is provided between the first light exit surface of the first light guide portion and the second light entry side surface of the second light guide portion.

[0024] Further, [3]: The vehicle lamp according to [2], characterized in that the light source is a socket type LED lamp provided with a plurality of LED elements.

[0025] Further, [4]: The vehicle lamp according to [3], characterized in that the first light entry side surface of the first light guide portion is a toric curved surface.

[0026] Further, [5]: The vehicle lamp according to any one of [1] to [4], characterized in that the light emission portion of the second light guide portion emits light from the light source into an irradiation range determined by a light distribution standard of a turn signal when the light source is lit.

[0027] According to each of the above-described other modes, [2] can further achieve weight reduction as compared with a case where the air layer is not provided and the resin layer is maintained. [3] can provide a vehicle lamp where replacement of the light source is easier because the socket type LED lamp is used as the light source. Further, because the LED elements mounted on the socket type LED lamp are a plurality of elements, a brighter vehicle lamp can be provided as compared with a case where one LED element is used with respect to the light guide body. [4] can reduce loss of light introduced into the light guide body because the first light entry side surface is a toric curved surface. [5] can provide a vehicle lamp suitable for a turn signal.

[0028] Effects of the Invention

[0029] According to the above-described structure, cost increase can be suppressed, and a light emission surface having a light emission portion and a non-light emission portion darker than the light emission portion can be obtained. Further, the following advantages are provided: light emitted from the light source can be effectively utilized, and the allowable degree of the relative positional accuracy of the light source and the light guide body can be increased. Further, the following advantage is provided: a vehicle lamp where the light utilization efficiency can be improved can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a plan view showing an automobile equipped with a vehicle lamp of one embodiment.

[0031] Figure 2 is a front view showing a rear lamp, that is, a view as seen from the rear side as an irradiation direction.

[0032] Figure 3 is a view showingFigure 2 Fig. 1 is a schematic plan view of a vehicle lamp according to the present application, which is shown with a part of a lamp assembly included in a rear lamp omitted.

[0033] Figure 4 Fig. 2 is a plan view showing a basic structure of a turn signal assembly, which is a main part of the vehicle lamp according to the present application.

[0034] Figure 5 Fig. 3 is a sectional view at a plane horizontal to the left-right direction, which is a main part for illustrating light from a light source incident to a light guide.

[0035] Figure 6 Fig. 4 is a perspective view showing a part of Figure 5 enlarged and illustrated.

[0036] Figure 7 Fig. 5 is a schematic perspective view for illustrating a relationship between the light source and the first light guide portion.

[0037] Figure 8 Fig. 6 is a schematic sectional view for illustrating light rays incident to the light guide from the light source, which is a sectional view along an up-down direction perpendicular to the sectional view of Figure 5 along the left-right direction.

[0038] Figure 9A Fig. 7 is a schematic front view for illustrating an illumination state of a light emitting surface, which is an explanatory view showing a non-illumination state.

[0039] Figure 9B Fig. 8 is a schematic front view for illustrating an illumination state of a light emitting surface, which is an explanatory view showing an illumination state.

[0040] Figure 10 Fig. 9 is a schematic front view for illustrating a light exit portion of a socket type LED lamp.

[0041] Figure 11A Fig. 10 is a plan view showing a main part of a light source used for a vehicle lamp according to a second embodiment.

[0042] Figure 11B Fig. 11 is a sectional view of a main part of the light source for the vehicle lamp according to the second embodiment, which is based on the line segment XIB-XIB shown in Figure 11A Fig. 12 is a plan view showing a main part of a light guide used for a vehicle lamp according to a third embodiment.

[0043] Figure 12 Fig. 13 is a plan view showing a main part of a light guide used for a vehicle lamp according to a fourth embodiment.

[0044] Figure 13 Fig. 14 is a plan view showing a main part of a light guide used for a vehicle lamp according to a fifth embodiment. DETAILED DESCRIPTION

[0045] The following describes the vehicle lamp of the present application with reference to the preferred embodiments, with reference to the attached drawings.

[0046] [First Embodiment]

[0047] Figure 1 is a plan view showing an automobile 1 equipped with a vehicle lamp of one embodiment. A plurality of vehicle lamps are equipped on the automobile, and emit light toward the outside of the vehicle to perform illumination or signal display. For example, a headlamp 2 is provided at both side corners in the front direction, a rear lamp 3 is provided at both side corners in the rear direction, and a high mount stop lamp 4 is provided in the center of the window portion in the rear direction of the vehicle. In addition, a door mirror turn signal lamp 5 that performs direction indication is provided in the left and right door mirrors. One or more lamp assemblies are provided inside each lamp. Furthermore, the type and size of the automobile are not limited to a specific type, and the vehicle lamp is equipped in various types of vehicles such as passenger cars, commercial vehicles, buses, and trucks.

[0048] In the following description, the terms "front", "rear", "left", "right", "upper", and "lower" refer to the directions observed from the driver in a state where the vehicle lamp is provided in the automobile. Therefore, "front" corresponds to the direction of irradiation of light from the headlamp 2, that is, the front direction of the vehicle (the traveling direction of the automobile), "rear" corresponds to the direction of irradiation of light from the rear lamp 3 and the high mount stop lamp 4, that is, the rear direction of the vehicle (the direction of the back of the driver), and "left" corresponds to the left side when the traveling direction of the vehicle is taken as a reference. "Lower" corresponds to the road surface side (the side of the driver's feet).

[0049] Figure 2 is a front view showing the rear lamp 3, that is, a view observed from the rear side that is the direction of irradiation. Figure 3 is a plan view showing a part of the lamp assembly included in the rear lamp 3 of Figure 2 . Figure 2 and Figure 3 show the rear lamp 3 that is a vehicle lamp provided in the right rear corner shown in A of Figure 1 . As shown in Figure 3 , the rear lamp 3 has a housing 10 that is open toward the rear and forms a space inside that accommodates a plurality of lamp assemblies, and an outer lens 11 that covers the opening of the housing 10 and forms a lamp accommodation portion 12 that accommodates the lamp assemblies. The outer lens 11 is fixed watertightly at a seal portion provided at the peripheral edge portion of the housing 10 by a seal member not shown. The outer lens 11 is a transparent light-transmitting cover formed of a resin material excellent in transparency, impact resistance, and weather resistance such as polycarbonate. A refractive element that refracts the irradiation light can be provided partially in the outer lens 11.

[0050] As shown in Figure 2As shown, a plurality of lamp assemblies are housed in the lamp housing portion 12. In the present embodiment, the reference numeral 6 is a tail lamp, the reference numeral 7 is a tail lamp & brake lamp, and the reference numeral 8 is a turn signal lamp. In addition, in Figure 3 the present embodiment, the tail lamp & brake lamp 7 and the like are omitted for easy understanding of the structure of the turn signal lamp assembly. The tail lamp assembly 6, the tail lamp & brake lamp assembly 7, and the turn signal lamp assembly 8 emit light of prescribed light distribution patterns corresponding to various functions to the outside of the vehicle through the outer lens 11. The vehicle lamp is sometimes constituted by only one lamp assembly, but sometimes a plurality of lamp assemblies are provided in the same housing. In the following description, the turn signal lamp assembly will be simply referred to as a turn signal lamp. An opening corresponding to the lamp assembly provided in the lamp housing portion is provided in the lamp housing portion 12, and an extension portion 9 is provided so as to be covered in such a manner that the housing 11 and the like cannot be visually recognized from the outside.

[0051] Figure 4 is a plan view showing the basic structure of the turn signal lamp 8. The turn signal lamp 8 corresponds to the vehicle lamp of the present application. The turn signal lamp 8 is provided with a light source 13 and a light guide 20 into which light from the light source 13 is emitted, the light guide 20 emitting light toward the outside of the vehicle from a light emitting surface 14. The light source 13 and the light guide 20 are fixed to the housing 10. In Figure 4 , only the main portions necessary for explaining the optical function of the turn signal lamp 8 are shown, and the housing 10 is omitted. In Figure 4 , the light source 13 is omitted. The light guide 20 is composed of a light-transmissive resin through which light emitted from the light source 13 is transmitted.

[0052] The turn signal lamp assembly 8 forms an appearance in which the light emitting surface 14 is longer in the lateral direction as shown in Figure 2 . The light emitting surface 14 corresponds to one of the side end surfaces of the light guide 20 which can be approximated to a plate shape as a whole. As shown in Figure 2 and Figure 10 , the light emitting portions 15 (15a to 15h) at 8 and the non-light emitting portions 16 (16a to 16i) at 9 are alternately arranged in the left-right direction (horizontal direction) in the lateral direction. When the light source 13 is lit, light is emitted toward the rear direction and the oblique side surface direction from the light emitting portions 15a to 15h at 8. As the vehicle lamp which is provided at the corner portion of the rear side of the vehicle, the turn signal lamp 8 irradiates light of a light distribution pattern which satisfies the necessary light distribution standard. Specifically, the light emitting surface 14 is formed so as to be inclined as a whole from the rear side of the vehicle to the side side, and the side side is located in front, so that, for example, with a reference axis in the vehicle driving direction (front-rear direction) as the center, the signal light of the turn signal lamp reaches within a range of 45° in the inside of the rear side of the vehicle and 80° in the side side of the rear side of the vehicle.

[0053] The light guide 20 has a first light guide portion 21 having a semicircular shape centered on the light exit portion 30 of the light source 13, and a second light guide portion 22 disposed at a position farther from the light source 13 than the first light guide portion 21. The light emitting surface 14 is provided in the second light guide portion 22. Further, the first light guide portion 21 and the second light guide portion 22 are integrated by being connected by the first connecting portion 17. The second light guide portion 22 has a plurality of light guide paths 23 extending in a direction opposite to the light source 13. The front end regions of the plurality of light guide paths 23 each become a light emitting portion 15 (15a to 15h). Further, the light source 13 will be described later.

[0054] Figure 5 is a cross-sectional view in a plane horizontal to the left-right direction for illustrating the light path of light from the light source 13 incident to the light guide 20, of a main portion. Figure 6 is an enlarged perspective view illustrating a portion of Figure 5 . Figure 7 is a schematic perspective view for illustrating the relationship of the light source 13 and the first light guide portion 21. Figure 8 is a schematic cross-sectional view for illustrating the light rays incident to the light guide 20 from the light source 13, and is a cross-sectional view in an up-down direction perpendicular to the left-right direction cross-sectional view of Figure 5 .

[0055] The first light guide portion 21 has a first light incident side surface 21a at a position separated from the light exit portion 30 to cause light emitted from the light exit portion to be incident to the light guide 20, a first light exit side surface 21b at an opposite side to the first light incident side surface 21a, having a similar shape to the first light incident side surface 21a in a cross-sectional left-right direction cross section centered on the light source 13, and a resin material layer 21c filling between the first light incident side surface 21a and the first light exit side surface 21b.

[0056] The shape of the cross section in the up-down direction of the first light incident side surface 21a and the shape of the cross section in the left-right direction are different. Specifically, a toric curved surface is formed. In the cross section in the left-right direction, as shown in Figure 5 , the cross-sectional shape in the horizontal direction is formed in a circular arc shape corresponding to light diffused in a radial state in the left-right direction centered on the optical axis Ax of light emitted from the light source. Thus, light incident to the first light guide portion 21 from the first light incident side surface 21a can be efficiently caused to be incident. Therefore, the first light guide portion 21 has a ring shape in which a portion of a ring is opened, centered on the light exit portion 30 of the light source 13, when viewed from above. On the other hand, in the cross section in the up-down direction, as shown in Figure 8As shown, the cross-sectional shape in the up-down direction is formed in a circular arc shape that is convex with the position passing through the optical axis Ax as the center. By being convex toward the light source, the light emitted from the light source center C is refracted as a parallel light ray and guided as light from the first light entrance side surface 21. Note that the light source center C is the central portion of the light emission portion, and the parallel light ray is not limited to a completely parallel light ray. The cross-sectional shape in the up-down direction can also be a refracting surface that condenses light in a manner that is considered to be a parallel light ray.

[0057] The first light exit side surface 21b is in the shape of a cylindrical side surface with the light source center C as the center. That is, in a cross section of a plane extending in the left-right direction passing through the light source center C, as shown in Figure 5 and Figure 7 is in a circular arc shape with the light source C as the center. In a cross section of a plane extending in the up-down direction passing through the light source center C, as shown in Figure 8 is in a straight line shape extending in the up-down direction. As a result, as shown in Figure 8 the light diffused in the left-right direction that has entered from the first light entrance side surface 21a exits from the first light exit side surface 21b while maintaining its direction of travel. On the other hand, the light diffused in the up-down direction that has entered from the first light entrance side surface 21a is refracted as light toward the substantially horizontal direction at the first light entrance side surface 21a and exits from the first light exit side surface 21b in a manner that travels straight in the substantially horizontal direction. In this way, the loss of light that has entered from the first light entrance side surface 21a can be reduced, and in the first light guide portion 21, the light that performs internal reflection inside the resin material layer 21c is reduced, and the light component that performs internal reflection at the first light exit side surface 21b is reduced. That is, the loss of light emitted from the light source 13 can be suppressed, and the light in one direction, the up-down direction in this embodiment, becomes a parallel light ray.

[0058] As shown in Figure 4 and Figure 5 the second light guide portion 22 has a base portion 23 that has a second light entrance side surface 22a at a position that opposes the first light exit side surface 21b and a second light exit side surface 22b formed on the opposite side of the second light entrance side surface 22a and formed in a cross-sectional shape in the up-down direction that is substantially parallel to the first light exit side surface 21b, and has a resin material layer 22c that fills between the second light entrance side surface 22a and the second light exit side surface 22b. Furthermore, the second light guide portion 22 has a plurality of light guide paths 24 that protrude from the base portion 23.

[0059] The base 23, when viewed from above, has a shape similar to the first light guide 21. That is, as a whole, it has an open-loop annular shape with the light emitting section 30 as a part. Therefore, the first light-incident side surface 21a, the first light-emitting side surface 21b, and the second light-incident side surface 22a, in a cross-section based on a plane extending in the left-right direction, are formed as arc shapes with concentric circles centered on the light source center C as the basis. The arc shape with concentric circles as the basis is not limited to a complete arc shape, but also includes arc shapes along approximate curves that can approximate the arc shapes of the individual concentric circles.

[0060] In addition, in this embodiment, such as Figure 4 As shown, the multiple light guide paths 24 protruding from the base 23 are composed of eight light guide paths 24a to 24h. Figure 4 As shown, the lengths of each light guide path 24a to 24h vary depending on the distance between the emitting surface 14 and the light source 13. Furthermore, each light guide path has a main body 25 and a front end 26 that are approximately rectangular in cross-section along the vertical direction. The main body 25 of each light guide path is formed as a quadrangular prism shape extending from the base end 25a on the base 23 side toward the front end 26 along a straight line and / or curved portion of a rectangular cross-section of approximately the same width. Figure 4 As shown, each front end portion 26 includes: an enlarged diameter portion 26a, which is larger in diameter than the light guide body portion 25; a light-emitting portion 15, which is narrower than the enlarged diameter portion 26a; and a connecting surface 26b, which connects the enlarged diameter portion 26a and the light-emitting portion 15.

[0061] Figure 9A , Figure 9B This is a general front view illustrating the lit state of the light-emitting surface 14. Figure 9A This is an explanatory diagram showing the non-lit state. Figure 9B This is an explanatory diagram showing the illuminated state. It illustrates the view of turn signal 8 from the reference axis in the vehicle's driving direction (forward and backward). Figure 9B This is a simulation diagram of the lit state; the blank area represents the light-emitting part 15 (15a-15h). Figure 9A The areas indicated by the grid lines are the light-emitting portions 15 (15a-15h), and the blank areas in between are the non-light-emitting portions 16 (16a-16i). Furthermore, the grid lines representing the light-emitting portions 15 (15a-15h) represent grid-like lens cuts formed on the surface of each light-emitting portion, and the area around the light-emitting surface 14 is covered by the extension portion 9. To allow the multiple light-emitting portions 15 (15a-15h) to alternate with the non-light-emitting portions 16 (16a-16i), the multiple light guide paths 24 are arranged separately in the left-right direction. The direction in which the multiple light-emitting portions 15 (15a-15h) are arranged side-by-side corresponds to the first direction in this invention.

[0062] The light from the light source 13 that reaches each of the light-emitting portions 15a-15h is incident on the second light guide portion 22 through the first light guide portion 21. In this embodiment, in order to efficiently incident light onto the base end portion 25a of each light guide path 24a-24h, a second light-incident surface 22d is formed on the second light-incident side surface 22a of the second light guide portion 22 at a position corresponding to each base end portion 25a. The second light-incident surface 22d is formed at eight locations corresponding to each of the eight light guide paths 24a-24h. Similarly, in order to efficiently guide light to each of the second light-incident surfaces 22d, a first light-emitting portion 21d is formed on the first light-emitting side surface 21b of the first light guide portion 21 at a position corresponding to the second light-incident surface 22d. The first light-emitting portion 21d is formed at eight locations corresponding to each of the eight light guide paths 24a-24h. Figure 8 As shown, the first light-emitting section 21d and the second light-incident surface 22d are formed as parallel planes. By making them mutually parallel planes, light emitted from the first light-emitting section 21d can be efficiently incident on the second light-incident surface 22d. Figure 8 As shown, in the vertical cross-section, the first light-emitting section 21d is parallel to the second light-receiving surface 22d, and the light emitted from the first light-emitting section 21d is converted into parallel light by the first light-receiving side surface 21a. Therefore, it travels parallel within the air layer 27 between the first light-emitting section 21d and the second light-receiving surface 22d. In the horizontal cross-section, the first light-emitting section 21d is parallel to the second light-receiving surface 22d, and the light emitted from the first light-emitting section 21d is light directly emitted from the light-emitting section 30 of the light source 13. Therefore, it travels in the same diffusion direction within the air layer 27 between the first light-emitting section 21d and the second light-receiving surface 22d. Therefore, the loss caused by reflection can be reduced in both the vertical and horizontal directions, and the light emitted from the light source 13 can be incident into the second light guide section with the light quantity loss suppressed, guiding the light to the eight light guide paths 24a to 24h. Furthermore, the first light-emitting portion 21d and the second light-attribute surface 22d are not limited to a plane; they can also be cylindrical surfaces with straight lines in the vertical direction, or multifaceted shapes based on a cylindrical surface. Additionally, while the first light-emitting portion 21d and the second light-attribute surface 22d are parallel in the vertical cross-section, when molding using a mold, the draft angle of the mold in the area where the air layer 27 is formed can be considered, and it can be slightly tilted. Figure 8 The diagram shows a slightly tilted example.

[0063] The size of the second light-incident surface 22d is the size of the area enclosed by the line of intersection between the imaginary surface obtained by extending the main body 25 of each corresponding light guide path 24a to 24h towards the light source 13 and the second light-incident side surface 22a. Figure 6In the diagram, the second light-incident surface 22d corresponding to light guide path 24a and the second light-incident surface 22d corresponding to light guide path 24b are shown painted gray. According to... Figure 6 It is understandable that, between adjacent second light-incident surfaces 22d, there exists a region AR1 of a second light-incident side surface 22a where no second light-incident surface 22d is provided. For example... Figure 8 As shown, the second light-incident surface 22d is disposed on each corresponding light guide path 24a to 24h. Therefore, when any adjacent light guide paths 24a to 24h are close to each other, for example, when the base end 25a of light guide path 24a and the base end 25a of light guide path 24b are close to each other in a manner that partially overlaps, the corresponding second light-incident surface 22d can also be disposed in a manner that partially overlaps. In the case of partial overlap, no light is formed. Figure 6 The area AR1 is shown. Light reaching the area AR1 is light that will not actively incident on each of the light guide paths 24, so it is preferable not to form the area AR1 or not to generate light toward the area AR1. For example, by forming the shape of the first light-emitting side surface 21b into an assembly of the first light-emitting portions 21d that emit light toward the second light-incident surface 22d opposite to all surfaces, it is possible not to generate light toward the area AR1.

[0064] In this way, the multiple first light-emitting portions 21d corresponding to the multiple second light-incident surfaces 22d are each formed as a refractive surface that focuses light from the light source 13 incident from the first light-incident side surface 21a toward the second light-incident surface 22d as substantially parallel rays. Each second light-incident surface 22d is a substantially flat plane perpendicular to the central axis of the light emitted from the first light-emitting portion 21d. As a result, the loss of light emitted from the light source 13 can be suppressed and distributed to the multiple light guide paths 24.

[0065] Multiple light guide paths 24 (24a-24h) protruding from the base 23 extend from each base end 25a toward the front end 26 in a manner without sharp angles. By extending along straight lines and / or curves in a manner without sharp angles, it is possible to reduce internal surface reflections in the middle of the light guiding within each light guide path 24 and suppress light loss.

[0066] The front end face of the front end 26 of each of the multiple light guide paths 24 (24a to 24h) becomes the light-emitting part 15 (15a to 15h). By appropriately changing the length, size, and arrangement direction of the multiple light guide paths 24, light-emitting surfaces of various shapes can be obtained. Preferably, the light guided inside the light guide path 24 that reaches the light-emitting part 15 travels in a straight line from the base end 25a, but depending on the lamp design, it may be light that travels through the light guide path 24 which extends without any bends. In each light guide path 24, when the base end 25a and the light-emitting part 15 are not in a straight line, the light that undergoes internal reflection inside the main body 25 of the light guide path reaches the light-emitting part 15. The internally reflected light may sometimes undergo multiple internal reflections due to the shape of the main body 25 of the light guide path. Sometimes the number of internal reflections until reaching the light-emitting part 15 may also vary. Thus, the light that undergoes internal reflection becomes light with multiple directions of travel compared to the light that travels in a straight line from the base end 25a to the light-emitting part 15. Therefore, in this embodiment, an enlarged diameter portion 26a and a connecting surface 26b are provided at the front end, and light components that are reflected from the connecting surface 26b and directed toward the light-emitting portion 15 are also generated. This expands the illumination range of the light emitted from the light-emitting portion 15. Furthermore, multiple lens-cut portions LC are provided in the light-emitting portion to control the direction of the refracted light emitted. This satisfies the light distribution standards required for turn signals.

[0067] Multiple light guide paths 24 (24a to 24h) have air layers between adjacent light guide path main bodies 25. For example... Figure 4 As shown, adjacent front ends 26 are connected by a third connecting portion 19 to the boundary portion of the light guide body 25 of each light guide path 24 and the front end 26. The resin layer FS of this connection forms part of the light-emitting surface 14. The light-emitting surface 14 is a region that is identified as the light-emitting area of ​​the turn signal 8, and when viewed from the front, it is composed of non-light-emitting portions 16 (16a to 16i) and light-emitting portions 15 (15a to 15h).

[0068] Furthermore, multiple light guide paths 24 (24a-24h) have air gaps between adjacent light guide path main bodies 25, and a second connecting portion 18 is integrally formed on the lower surface as a continuous plane. The air gaps between adjacent light guide path main bodies 25 are, in other words, recesses between them. By making the lower surface a continuous plane, a mounting portion 27 for fixing to the housing 10 can be provided at a position that does not affect the light emission within the light guide path body. The mounting portion 27 is, for example, a... Figure 4 The two locations shown are threaded holes used to fix the housing 10.

[0069] Furthermore, the first light guide portion 21 and the second light guide portion 22 are integrally formed on their lower surface sides as a continuous plane through the first connecting portion 17. Therefore, the light guide body 20 can be treated as a single plate-shaped component. Air layers are provided between the first light guide portion 21 and the second light guide portion 22, and between adjacent light guide body portions 25 of the plurality of light guide paths 24 (24a-24h), thus achieving weight reduction even when the entire component is a solid plate-shaped component.

[0070] Next, the light source 13 will be explained.

[0071] In this embodiment, an LED module consisting of a socket-type LED lamp is used. This socket-type LED lamp is equipped with multiple orange-light-emitting LED elements 31 formed by stacking semiconductor layers. The socket-type LED lamp is installed in a replaceable manner in a socket mounting hole (not shown) provided in the housing 10. This allows for easy replacement in case the light source 13 fails. The light guide 20 is directly or indirectly mounted to the housing 10. By mounting the light source 13 consisting of a socket-type LED lamp in the socket mounting hole, the light emitting portion 30 of the light source 13 is positioned relative to the light guide 20 fixed to the housing 10 at a predetermined position. Figure 4 The light source 13 and light guide 20 indicate the state of being configured in the specified position. Furthermore, the light source 13 is not limited to a socket-type LED light; it can also be a surface-mount LED with multiple light-emitting elements arranged in a row, or other types of light sources. The orange-emitting LED element 31 uses an LED element that emits a light color that complies with the regulations required for use as a turn signal 8.

[0072] Figure 7 This is a schematic perspective view illustrating the positional relationship between the light source 13, which is composed of a socket-type LED lamp of this embodiment, and the first light guide portion 21 of the light guide 20. Figure 10This is a top view showing an enlarged view of the light emitting portion 30 of the socket-type LED lamp 13. The socket-type LED lamp 13 has multiple LED elements 31 mounted on the front surface of a circuit board 32 with wiring patterns 33. A frame 34 is provided on the front surface of the circuit board 32 to reflect the light emitted by the multiple LED elements 31 forward. The frame 34 is made of a cylindrical white component and is arranged to surround the multiple LED elements 31 around its center on the front surface of the circuit board 32. A transparent sealing resin is provided inside the frame 34 to seal its interior. The circuit board 32 is fixed to the substrate mounting portion 36 of the socket body 35. A heat sink 37 for dissipating heat emitted by the LED elements 31 to the outside is provided at the rear of the substrate mounting portion 36. Additionally, a connector portion electrically connected to the circuit board 32 via multiple lead terminals (not shown) is provided at the rear of the socket body 35. A socket part 38 is provided in the socket body 35 in the direction surrounding the substrate mounting part 36. The socket part 38 is detachably engaged with the socket fixing hole of the housing 10 (not shown).

[0073] Figure 10 This is a schematic front view illustrating the light emitting section 30 of a socket-type LED lamp. The area inside the frame 34 is the light emitting section 30. Multiple LED elements 31 each emit light with Lambertian light distribution characteristics. In Lambertian light distribution, the emitted light is directional, centered on the optical axis direction (the direction perpendicular to the light-emitting surface of the LED element), and the angle of half the luminous intensity along the optical axis is the light emitted at a 60-degree angle centered on the optical axis. Each LED element 31 has this directional characteristic. The frame 34 reflects a portion of the light component emitted from the LED elements 31. The light reflected by the frame 34 is light with a luminous intensity less than half that along the optical axis, but by also utilizing this light, the light emitted from the LED elements 31 can be effectively utilized.

[0074] In this embodiment, four LED elements 31 are arranged at the vertices of a square in the light emitting section 30. The light emitted from the light emitting section 30 is a composite light consisting of direct light from the four LED elements 31 and reflected light from the frame 34, etc. The aforementioned light source center C is the center point when the four LED elements are arranged and installed, and the center of the frame 34 also coincides with the light source center C.

[0075] Considering the relative size of the light emitting section 30 to the light guide 20, it is difficult to regard it as a point light source. Furthermore, when using a replaceable socket-type LED lamp 13, the positional accuracy between them deteriorates compared to the case where the LED element 31 is directly aligned with the light guide 20. Therefore, the light incident on the light guide 20 not only consistently... Figure 5As shown, when light is incident from the center C of the light source, a situation also arises where light from a position near the center C of the light source travels towards the first incident light side 21a. Furthermore, the light actually originating from the center C of the light source is not actually from... Figure 5 The light is not from a point source as shown, but from a range of light of a certain size. Therefore, there is also a light component that travels from a position near the center C of the light source toward the first incident light side 21a and is guided within the light guide 20.

[0076] In this embodiment, the first light-incident side surface 21a is formed in an arc shape with the center of the light source C as the rotation center in the left-right cross section. Therefore, not only the light source center C, but also light reaching the first light-incident side surface 21a from its vicinity is incident radially with the reflection of the first light-incident side surface 21a suppressed. Therefore, even when the light source 13 is not considered a point light source as described above, the first light guide can focus the light. Furthermore, in the vertical cross section, the central portion of the first light-incident side surface 21a is a protruding convex shape, which transforms the light into parallel rays. Light reaching the first light-incident side surface 21a from the vicinity of the light source center C also plays the same role in the vertical cross section, and thus can travel to the second light guide 22 as approximately parallel light. Therefore, even when a socket-type LED lamp 13 equipped with multiple LED elements is used as the light source 13, light can be incident on the first light guide 21 with the loss of radially emitted light suppressed, the loss generated in the first light guide 21 suppressed, and the light is guided to the second light guide 22. Furthermore, when using a socket-type LED lamp 13 equipped with multiple LED elements as the light source 13, compared to the case in Patent Document 1 where only one LED element 31 is used as the LED light source and placed on a light guide plate in a 1:1 ratio, multiple LED elements 31 used as the light source can be used, and a multi:1 or multi:multi ratio can be set. For example, in this embodiment, four are used, but if five or more are used, it can be brighter. As a result, the luminous intensity of the light emitted from the light-emitting surface 14 can be easily increased, and the luminous intensity of the light emitted from the light-emitting portion 15 (15a to 15h), which is the final light-emitting area, can be increased. In addition, even when using multiple LED elements, the intended positional relationship between each LED element and the incident portion of the light guide can be set separately, as in Patent Document 1. Therefore, the range of deviations in the assembly of vehicle lamps can be increased, making the assembly of vehicle lamps easier and reducing the number of defective products.

[0077] According to this embodiment, the vehicle lamp allows light emitted from the light source 13 to enter the light guide 21 through the separately arranged light-emitting portions 15 (15a-15h) in a way that minimizes light loss, and then be divided into multiple light guide paths 24 for light guiding with minimal loss. Furthermore, since the second light-incident surface 22d is arranged to travel towards each light guide path 24, almost no light is generated towards the non-light-emitting portions 16 of each light-emitting portion 15 (15a-15h). Therefore, a light-emitting surface 14 with improved brightness contrast between the light-emitting portions 15 and the non-light-emitting portions 16 can be obtained, making the light-emitting portions 15 more prominent. In addition, in this embodiment, the multiple light guide paths 24 are each formed with the same width, but by reducing the width of the light guide paths 24 located on or near the optical axis of the light source and increasing the width of the separated light guide paths 24, the brightness distribution in the light-emitting surfaces 14 of the multiple light-emitting portions 15 can be made more uniform.

[0078] [Second Implementation]

[0079] Next, the second embodiment will be described.

[0080] Figure 11A This is a top view showing the main part of the light source 13 used in the vehicle lamp of the second embodiment. Figure 11B Based on Figure 11A The diagram shows a cross-sectional view of the main part of the light source used in the vehicle lamp of the second embodiment, along line segment XIB-XIB. The second embodiment uses the same light guide 20 as the first embodiment. It also uses a socket-type LED lamp as the light source 13. The difference from the first embodiment lies in the number of LED elements arranged inside the frame 34 of the socket-type LED lamp in the first embodiment. Other than this, the structure is the same as the first embodiment, so the description here is omitted.

[0081] The area inside the frame 34 becomes the light emitting part 30. In the first embodiment, as shown... Figure 10 As shown, four orange-emitting LED elements 31 are arranged in a 2-row × 2-column configuration. In the second embodiment, as... Figure 11A As shown, arranged in three rows, the first and third rows have two LEDs each, and the second row has three, for a total of seven LED elements 41. Four LED elements 41a in the first and third rows emit white light, while the three LED elements 41b in the second row emit orange light. The multiple white-emitting LED elements 41a and the multiple orange-emitting LED elements 41b are wired and controlled to allow for independent lighting. Thus, the socket-type LED light becomes a dual-color light source. Furthermore, as... Figure 11AAs shown, white resin 42 is filled between each LED element 41 and between each LED element 41 and the frame 34. Additionally, as... Figure 11B As shown, the white resin 42 is formed to cover the sides of each LED element 41 but not the top surface. This reflects the light component emitted from each LED element 41 in a direction perpendicular to the optical axis, thereby increasing the light component emitted in the optical axis direction.

[0082] In the second embodiment, switching between white and orange light emission is possible. The four LED elements 41a emitting white light and the three LED elements 41b emitting orange light have different light emission portions within the light emitting section 30. Therefore, the light distribution pattern of the light source light directed towards the first light-incident side surface 21a of the light guide 20 differs in the case of white light emission and the case of orange light emission when viewed in three dimensions. However, in the second embodiment, the light-incident surfaces 21a of the bases 23 of the first and second light guide sections are located on concentric circles centered on the light source center C, and the first light-incident side surface 21a is composed of an annular curved surface. Therefore, in the case of any color of light emission, light loss can be suppressed to illuminate light from the multiple light-emitting sections 15, and light components directed towards the non-light-emitting sections 16 between the multiple light-emitting sections 15 can be suppressed to form a light-emitting surface 14 with high contrast between light and dark.

[0083] [Third Implementation Method]

[0084] Next, the third embodiment will be described.

[0085] Figure 12 This is a top view showing the main part of the light guide used in the vehicle lamp according to the third embodiment. The third embodiment uses the same light source 13 as the first embodiment. The construction of the first light guide portion of the light guide 20 is different, while the construction of the second light guide portion 22 is the same as in the first embodiment. The same reference numerals are used for structures that are the same as in the first embodiment, and the description here is omitted.

[0086] like Figure 12 As shown, the first light guide portion 42 of this embodiment has: a first light-incident side surface 21a, which allows light emitted from the light-emitting portion 30 centered on the light source center C to be incident on the light guide 20; a first light-emitting side surface 42b, which is located on the opposite side of the first light-incident side surface 21a; and a resin material layer 21c, which fills the space between the first light-incident side surface 21a and the first light-emitting side surface 42b.

[0087] The first light-emitting side surface 42b generally presents the shape of a cylindrical side surface centered on the light source center C. That is, in a cross-section of a plane extending in the left-right direction through the light source center C, as shown... Figure 5 as well as Figure 7As shown, it has a first light-emitting portion 21d formed on an arc centered on the light source C. The first light-emitting portion 21d is the same as in the first embodiment, formed at a position corresponding to the second light-incident surface 22d provided on the second light guide portion 22. The difference between this embodiment and the first embodiment is that a recess 42c is provided between adjacent first light-emitting portions 21d and / or at positions adjacent to the first light-emitting portions 21d.

[0088] The light emitted from the final light-emitting section 15 (15a-15h) of the light guide 20 is light that enters the light guide 20 from the first light-incident side surface 21a. Furthermore, this light is a component of light that travels through the light guide path 24 (24a-24h) corresponding to each of the light-emitting sections 15 (15a-15h), the second light-incident surface 22d, and the first light-emitting section 21d.

[0089] To improve the contrast between the light-emitting portion 15 (15a-15h) and the non-light-emitting portion 16 (16a-16i), it is preferable to suppress light that does not pass through the light guide path 24 (24a-24h) and heads toward the light-emitting surface 14. Therefore, in this embodiment, by forming the recess 42c as an inclined reflective surface, the light passing through the recess 42c and heading toward the second light-incident side surface 22a is reduced. The recess 42c is formed with... Figure 12 The plane is inclined in the cross-section perpendicular to the paper. Specifically, on the upper side of the first light guide 42, it lies on an arc centered on the same light source C as the first light emitting section 21d; on the lower side of the first light guide 42, it lies on an arc with a smaller diameter that is concentric with the arc centered on the same light source C as the first light emitting section 21d, but with a reduced radius. These different concentric circles form a plane that connects in the vertical direction. Thus, for the light incident from the first light-incident side surface 21a that reaches the recess 42c, since the recess 42c is an inclined reflecting surface inclined in the vertical direction, a portion of the light is reflected upwards, and another portion is refracted downwards and emitted. As a result, the light heading towards the second light-incident side surface 22a is reduced. Furthermore, if it is desired that the non-light-emitting portion 16 (16a-16i) emits light darker than the light-emitting portion 15 (15a-15h) and thus emits light with a difference in brightness, without increasing the contrast between the light-emitting portion 15 (15a-15h) and the non-light-emitting portion 16 (16a-16i), it is acceptable to simply make the recess 42c a diffuser surface with fine irregularities instead of a reflective inclined surface.

[0090] [Fourth Implementation Method]

[0091] Next, the fourth embodiment will be described.

[0092] Figure 13This is a top view showing the main part of the light guide used in the vehicle lamp according to the fourth embodiment. The same reference numerals are used for structures identical to those in the first embodiment, and descriptions are omitted here. In the fourth embodiment, multiple light sources 13 identical to those in the first embodiment are used. Figure 13 Three are used. The light guide 43 is provided with three first light guide portions 21 corresponding to the three light sources 13 and three bases 23 corresponding to each of the first light guide portions. In each base 231, 232, 233, three light guide paths 24 extend relative to each base. The light guide paths 241 and 242 located between adjacent bases 231 and 232 are joined to form one light guide path 243, so that the emitted light from the two light sources overlaps. Similarly, the light guide paths 244 and 245 located between adjacent bases 232 and 233 are joined to form one light guide path 246, so that the emitted light from the two light sources overlaps. Therefore, a brighter light-emitting portion 15 can be formed. For example, it can also be used to deal with situations where brighter illumination light than turn signals, such as DRLs (daytime running lights), is required.

[0093] The embodiments of the present invention have been described above, but these embodiments are merely illustrative in all respects. The present invention is not to be interpreted as limited by these descriptions. The present invention can be modified in various other forms by adding, omitting, substituting, and otherwise altering the structure without departing from its spirit. For example, an extension of a window corresponding to the light-emitting portion 15, which is provided in a manner covering the light-emitting surface 14, may be provided between the outer lens and the light guide 20. Furthermore, the example described is a turn signal 8 provided on a taillight located at the rear of a vehicle, but it is not limited thereto. It is also possible to... Figure 1 The aforementioned turn signal 8 is installed on the headlight 2 and the door rearview mirror turn signal 5 shown. In addition, it is not limited to the turn signal 8; for example, the illumination color of the light source 13 can also be set to red and applied to the high-mounted brake light 8.

[0094] Industrial utilization potential

[0095] Vehicle lights that can be applied to motorcycles, automatic two-wheelers, scooters and other motorcycles, as well as vehicles that are considered motorcycles, four-wheeled cars, trucks, tricycles and other vehicles with interior space.

[0096] Explanation of reference numerals in the attached figures

[0097] 1…car

[0098] 2…headlights

[0099] 3… Rear lights

[0100] 4…High-mounted brake light

[0101] 5… door rearview mirror turn signals

[0102] 6… Taillights

[0103] 7…Taillights & Brake Lights

[0104] 8… Turn signals

[0105] 9…Extension Section

[0106] 10…shell

[0107] 11…External lens

[0108] 12…Lamp Storage Section

[0109] 13…Light source (socket-type LED light)

[0110] 14…luminous surface

[0111] 15…Light-emitting part 15 (15a~15h)

[0112] 16…Non-luminescent part 16 (16a~16i)

[0113] 17…First Linkage Section

[0114] 18…Second Link

[0115] 20, 43… light guides

[0116] 21, 42… First light guide section

[0117] 22…Second light guide section

[0118] 21a…First incident light side surface

[0119] 21b, 42b... First light-emitting side

[0120] 21c…resin material layer

[0121] 21d…First Ideobu 21d

[0122] 22a…Second incident light side surface

[0123] 22b…Second light-emitting side

[0124] 22c…resin material layer

[0125] 22d…Second light-receiving surface 22d

[0126] 23, 231, 232, 233… base

[0127] 24…Light guide path 24 (24a~24h)

[0128] 241, 242, 243, 244, 245, 246… Light guide paths

[0129] 25… Light guide body 25

[0130] 26…front end 26

[0131] 25a…base end 25a

[0132] 26a…Expanded diameter section 26a

[0133] 26b…Connecting surface 26b

[0134] 27… Installation Department

[0135] 30...Light exit part

[0136] 31, 41… LED components

[0137] 32…Circuit board

[0138] 33… Wiring pattern

[0139] 34…Frame

[0140] 35…Socket body

[0141] 36…Substrate mounting section

[0142] 37…Radiator

[0143] 38…Socket Section

[0144] 42c…concave

[0145] C…light source center

[0146] Ax…optical axis

[0147] AR1…area

[0148] LC…lens cutting section

Claims

1. A vehicle lamp having a light source and a light guide that guides emergent light from the light source toward the front of the lamp, characterized in that the light guide has a first light guide portion in a semicircular shape centered on a light emergent portion of the light source, and a second light guide portion disposed at a position farther from the light emergent portion than the first light guide portion, the first light guide portion has a first light entry side surface at a position apart from the light emergent portion for entry of diffused light emergent from the light emergent portion, and the first light entry side surface takes a circular arc centered on the light emergent portion as a motif, and a first light exit side surface at an opposite side of the first light entry side surface that takes a circular arc concentric with the circular arc of the first light entry side surface as a motif, and has a first light exit surface at the first light exit side surface for exit of light that has entered from the first light entry side surface and been guided within the first light guide portion, the second light guide portion has a second light entry side surface opposite the first light exit side surface that takes a circular arc concentric with the circular arc of the first light entry side surface as a motif, a second light exit side surface formed at an opposite side of the second light entry side surface that is approximately parallel to the first light exit side surface, and a plurality of light guide paths that project from the second light exit side surface in a direction away from the light emergent portion and have light emitting portions at front end regions, the plurality of light guide paths are arranged in a manner that the light emitting portions are arranged separately in a first direction, second light entry surfaces are formed at the second light entry side surface corresponding to base end portions of the plurality of light guide paths, and the second light entry surfaces cause light emergent from the first light exit surface to enter the second light guide portion, the first light exit surfaces have first light exit portions corresponding to the second light entry surfaces, respectively, and the first light exit portions are refractive surfaces that condense light from the light source that has entered from the first light entry side surface into approximately parallel rays of light after guiding the light within the first light guide portion toward the second light entry surfaces, and each of the second light entry surfaces is a substantially planar surface perpendicular to the approximately parallel rays of light emergent from the first light exit portions.

2. The vehicle lamp according to claim 1, characterized in that the first light guide portion and the second light guide portion are joined in a plane perpendicular to the first direction, and an air layer is provided between the first light exit surface of the first light guide portion and the second light entry side surface of the second light guide portion.

3. The vehicle lamp according to claim 2, characterized in that the light source is a socket type LED lamp having a plurality of LED elements.

4. The vehicle lamp according to claim 3, characterized in that the first light entry side surface of the first light guide portion is a toric surface.

5. The vehicle lamp according to any one of claims 1 to 4, characterized in that the light emitting portions of the second light guide portion emit light from the light source toward an irradiation range determined by a light distribution standard for a turn signal when the light source is lit. ​

Images