Vehicle lamp

Abstract

The present invention provides a vehicle lamp that can illuminate a wide range of positions in the horizontal direction by using a projection lens in which the incident surface and the exit surface are a single curved surface. A vehicle lamp (10) comprises: a light-guiding lens (12) that guides light from a plurality of light sources (21) arranged in the width direction; and a projection lens (13) that projects light guided by the light-guiding lens (12) to form a projected light distribution pattern (light distribution pattern LP for passing) that illuminates an area ahead of a vehicle. The light-guiding lens (12) has a lateral reflection section (40) that partially protrudes toward the projection lens (13) side. The lateral reflection section (40) reflects at least a portion of light from an end light source (21E), which is located at an end among the plurality of light sources (21), toward a projection incident surface (13a) of the projection lens (13) in a lateral illumination direction Ds so that same is made to travel to a horizontal edge portion of the projected light distribution pattern.

Description

Vehicle lighting fixtures

[0001] The present disclosure relates to a vehicle lamp.

[0002] One type of vehicle lamp is designed to project light from a light source using a projection lens to illuminate a wide horizontal area (see, for example, Patent Document 1). In this vehicle lamp, the projection lens is configured by connecting multiple lens sections with different optical properties in the width direction, thereby illuminating a wide horizontal area.

[0003] JP 2017-84581 A

[0004] However, the above-mentioned vehicle lamps have a complicated projection lens configuration, which leads to increased manufacturing costs. For this reason, it is conceivable to avoid the complexity and suppress the increase in manufacturing costs by using a projection lens configured with a single curved entrance surface and exit surface for vehicle lamps, but this makes it difficult to illuminate a wide range of positions horizontally.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a vehicle lamp that can illuminate a wide range of positions horizontally using a projection lens whose entrance surface and exit surface are a single curved surface.

[0006] The vehicle lamp of the present disclosure comprises a light guide lens that guides light from a plurality of light sources arranged in a width direction, and a projection lens that projects the light guided by the light guide lens to form a projected light distribution pattern that illuminates the area ahead of the vehicle, wherein the light guide lens has a side reflecting portion that partially protrudes toward the projection lens, and the side reflecting portion reflects at least a portion of the light from an end light source located at an end of the plurality of light sources toward the projection incident surface of the projection lens in a side illumination direction inclined with respect to the optical axis direction so as to cause the light to travel toward the horizontal end of the projected light distribution pattern.

[0007] According to the vehicle lamp of the present disclosure, a projection lens in which the entrance surface and exit surface are formed as a single curved surface can be used to illuminate a wide range of positions in the horizontal direction.

[0008] 6 is an explanatory diagram showing a state in which a vehicular lamp according to a first embodiment of the present disclosure is viewed from above. FIG. 6 is an explanatory diagram showing a state in which the vehicular lamp is viewed from the side of each light source. FIG. 6 is an explanatory diagram showing a state in which the vehicular lamp is viewed from the side of the projection lens. FIG. 6 is an explanatory diagram showing a cross section taken along line II shown in FIG. 1. FIG. 6 is an explanatory diagram similar to FIG. 1 showing the state in which light reflected by the outermost reflective curved surface of the lower internal reflective surface travels. FIG. 6 is an explanatory diagram showing a central illumination pattern formed by the vehicular lamp on a screen where a horizontal line and a vertical line intersect at the center position on the projection optical axis. FIG. 6 is an explanatory diagram showing a side illumination pattern formed by the vehicular lamp on a screen similar to FIG. 6. FIG. 6 is an explanatory diagram showing a passing light distribution pattern as a projected light distribution pattern formed by the vehicular lamp on a screen similar to FIG. 6. FIG. 6 is an explanatory diagram showing a state in which the vehicular lamp according to a second embodiment of the present disclosure is viewed from above. FIG. 6 is an explanatory diagram showing a state in which the vehicular lamp is viewed from the side of each light source. FIG. 6 is an explanatory diagram showing a state in which a light guide lens of the vehicular lamp is viewed from the side of the projection lens. 10 is an explanatory diagram showing a cross section taken along line II-II shown in Fig. 9. An explanatory diagram similar to Fig. 9 showing the progression of light emitted from a first light source. An explanatory diagram showing a central illumination pattern formed by a vehicular lamp on a screen similar to Fig. 6. An explanatory diagram showing a side illumination pattern formed by a vehicular lamp on a screen similar to Fig. 6. An explanatory diagram showing a low-vehicle light distribution pattern formed as a projected light distribution pattern on a screen similar to Fig. 6.

[0009] Hereinafter, embodiments of a vehicle lamp according to the present disclosure will be described with reference to the drawings. Note that in Figures 2 to 4 and 10 to 12, the light source unit 11 is omitted to make it easier to understand the components.

[0010] A vehicle lamp 10 according to a first embodiment of a vehicle lamp according to the present disclosure will be described with reference to FIGS. 1 to 8 . The vehicle lamp 10 according to the first embodiment is used as a headlamp device for a vehicle such as an automobile. The vehicle lamp 10 is provided in a lamp chamber formed by a lamp housing, the open front end of which is covered by an outer lens, on both the left and right sides of the front of the vehicle. The vehicle lamp 10 is provided in the lamp chamber via an up-down optical axis adjustment mechanism and a left-right optical axis adjustment mechanism, and appropriately illuminates the area ahead of the vehicle. In the following description, in the vehicle lamp 10, the direction in which the vehicle travels is defined as the front-to-rear direction (referred to as Z in the drawings), the vertical direction when the front-to-rear direction is aligned with a horizontal plane is defined as the up-to-down direction (referred to as Y in the drawings), and the direction perpendicular to the front-to-rear and up-to-down directions (horizontal direction) is defined as the width direction (referred to as X in the drawings). These directions are defined as the front and rear in the front-to-rear direction, the top and bottom in the up-to-down direction, and the left and right in the width direction, as viewed from an occupant inside the vehicle. Here, the vehicle lamp 10 of Example 1 has basically the same configuration whether it is installed on the left side of the vehicle or the right side, but is inverted in the width direction, so the following explanation will be given using the vehicle lamp 10 installed on the right side.

[0011] As shown in Figures 1 to 5, the vehicle lamp 10 of the first embodiment includes a light source unit 11, a light guide lens 12, and a projection lens 13, and constitutes a lamp unit having a projection optical axis Lp along the front-to-rear direction. The light source unit 11 is attached to a heat sink formed of, for example, a thermally conductive aluminum plate, aluminum die-cast, or resin. The heat sink may be provided with, for example, multiple heat dissipation fins, and may mainly dissipate heat generated by the light source unit 11 to the outside through the heat dissipation fins. The heat sink may also be configured as a mounting member to which the light guide lens 12 and the projection lens 13 are attached via a support member or the like.

[0012] As shown in FIG. 1 and other figures, the light source unit 11 has five light sources 21 and a substrate 22 on which the light sources 21 are mounted. Each light source 21 is configured with a light-emitting element such as an LED (Light Emitting Diode). Five light sources 21 are arranged at approximately equal intervals in the width direction. When individually showing the five light sources 21, they are referred to as a first light source 211, a second light source 212, a third light source 213, a fourth light source 214, and a fifth light source 215, in order from the left when viewed from the front of FIG. 1 . In Example 1, the first light source 211 at the left end of the light sources 21 is designated as an edge light source 21E. At least a portion of the light emitted from this edge light source 21E is used to form a side illumination pattern Ps (see FIG. 7 and other figures) described later.

[0013] The substrate 22 is a plate-like aluminum substrate. The substrate 22 may be made of a resin material such as a glass epoxy substrate, or may be made of other materials. The substrate 22 is provided with a wiring pattern and connector terminals that electrically connect the five light sources 21. This substrate 22 receives appropriate power from a lighting control circuit via the connector terminals to appropriately light up each light source 21.

[0014] 1 to 5 , the light guide lenses 12 are provided corresponding to the five light sources 21 of the light source unit 11, and are molded articles made of a transparent resin material. The light guide lenses 12 are optical lenses that guide light emitted from each light source 21 inward and form a projected light distribution pattern (a low-beam light distribution pattern LP (see FIG. 8 ), which will be described later) in cooperation with the projection lens 13. The light guide lens 12 is provided with five light guide entrance sections 31 on the lower side in the vertical direction. Each light guide entrance section 31 corresponds individually to a respective light source 21, and while basically having the same configuration, each has optical characteristics (surface shape, etc.) according to the light distribution image desired for that light guide lens 12.

[0015] Each light-guiding entrance portion 31 has a portion facing the corresponding light source 21 that protrudes toward the light source 21, and a center that is recessed toward the opposite side of the light source 21. As shown in FIG. 4 , the light-guiding entrance portion 31 has an opposing entrance surface 32, an inclined entrance surface 33, and an annular reflecting surface 34. The opposing entrance surface 32 is curved convexly toward the light source 21, and the light source 21 is positioned near the rear focal point (rear focal point) on the rear side (on the light source 21 side). The opposing entrance surface 32 causes light emitted from the light source 21 to enter the light-guiding lens 12 as parallel light traveling approximately parallel to the axis of the light-guiding entrance portion 31, and the parallel light travels toward a lower internal reflecting surface 35, which will be described later. Note that this parallel light (parallel light) refers to light that has been collimated by passing through the opposing entrance surface 32.

[0016] The inclined incident surface 33 is provided so as to surround the opposing incident surface 32 in a truncated cone shape while protruding from the opposing incident surface 32 toward the light source 21. This inclined incident surface 33 allows light from the light source 21 that does not proceed to the opposing incident surface 32 to enter the light-guiding lens 12. The annular reflective surface 34 is provided so as to surround the inclined incident surface 33 in a truncated cone shape, and is positioned at a position where light that has entered the light-guiding lens 12 from the inclined incident surface 33 proceeds. The annular reflective surface 34 reflects the light that has entered from the inclined incident surface 33, and causes the light to proceed toward a lower internal reflective surface 35 (described later) as parallel light that proceeds approximately parallel to the axis of the light-guiding incident portion 31. The annular reflective surface 34 may reflect light by total reflection, or may reflect light by adhering aluminum, silver, or the like to the annular reflective surface 34 by vapor deposition, coating, or the like.

[0017] The lower internal reflective surface 35 is provided on the front side of each light-guiding entrance portion 31 in the front-rear direction. This lower internal reflective surface 35 reflects light incident from each light-guiding entrance portion 31 toward the upper internal reflective surface 36 of the light-guiding lens 12. This lower internal reflective surface 35 is configured by providing a plurality of free-form surfaces based on a paraboloid whose focal point is near the cutoff edge 36a of the upper internal reflective surface 36. The lower internal reflective surface 35 reflects light incident from the light-guiding entrance portion 31, causing the light to travel near the cutoff edge 36a. Therefore, the lower internal reflective surface 35 functions as a first internal reflective surface that reflects light incident from the light-guiding entrance portion 31 in an intersecting direction intersecting the optical axis direction along the projection optical axis Lp. Note that the lower internal reflective surface 35 may be configured to utilize total reflection, be subjected to a reflection treatment, or have another configuration, as long as it reflects light as described above. Furthermore, the lower inner reflective surface 35 may be a single surface, and is not limited to the configuration of the first embodiment.

[0018] As shown in FIG. 3 , the lower internal reflective surface 35 in Example 1 has an edge reflective surface portion 35E at a location corresponding to the edge light source 21E, which is positioned at the leftmost position among the light sources 21. This edge reflective surface portion 35E has three reflective curved surfaces 35e, which are reflective curved surfaces 35ea, 35eb, and 35ec, arranged from left to right in the width direction. The reflective curved surfaces 35eb and 35ec are optically configured to reflect light from the light guide entrance portion 31 toward the vicinity of the cutoff edge 36a. The reflective curved surface 35ea reflects light from the light guide entrance portion 31 in a direction traveling toward the lateral reflective portion 40 (its lateral reflective surface 41), which will be described later. In Example 1, the reflective curved surface 35ea is optically configured to reflect light upward along the vertical direction. Therefore, the end reflective surface portion 35E reflects a portion of the light from the end light source 21E that travels to the reflective curved surface 35ea to the upper internal reflective surface 36 in the direction toward the lateral reflective portion 40, and reflects the remaining light toward the vicinity of the cutoff edge portion 36a, as with the other lower internal reflective surfaces 35.

[0019] The upper internal reflective surface 36 is provided above the lower internal reflective surface 35 in the up-down direction. This upper internal reflective surface 36 reflects light reflected by the lower internal reflective surface 35 toward the light-guiding output portion 37 of the light-guiding lens 12. Therefore, the upper internal reflective surface 36 functions as a second internal reflective surface that reflects the light reflected by the lower internal reflective surface 35 in the optical axis direction along the projection optical axis Lp. The lower edge of this upper internal reflective surface 36 is a cutoff edge 36a. This cutoff edge 36a forms a cutoff line CL and has a shape in which horizontal edges of different heights are joined by an inclined edge. This cutoff edge 36a is located near the focal point (rear focal point) of the projection lens 13 through the light-guiding output portion 37 (output surface 38) described below. This upper internal reflective surface 36 does not reflect, toward the light guide output portion 37, light that has been reflected by the lower internal reflective surface 35 and travels below the cutoff edge 36a, so that the shape of the cutoff edge 36a can be reflected in the light that is reflected toward the light guide output portion 37. Furthermore, the upper internal reflective surface 36 reflects, forward along the front-to-rear direction, the light that has been reflected by the reflective curved surface 35ea of ​​the end reflective surface portion 35E of the lower internal reflective surface 35.

[0020] Here, even when the vehicle lamp 10 is provided on the left side of the vehicle, the relationship between the direction of inclination and height of the cut-off edge 36a of the upper inner reflective surface 36 is not reversed in the width direction. In other words, the vehicle lamp 10 is reversed in the width direction between the right and left sides of the vehicle, but the inclination of the cut-off edge 36a of the upper inner reflective surface 36 is in the same direction.

[0021] The light-guiding and emitting portion 37 is provided on the front side of the upper internal reflective surface 36 in the front-to-rear direction. This light-guiding and emitting portion 37 partially protrudes forward from the light-guiding lens 12, and its protruding end serves as an emitting surface 38. The emitting surface 38 is positioned opposite the upper internal reflective surface 36 in the front-to-rear direction, and is a free-form surface based on a sphere that is set so that the focal point (rear focal point) of the projection lens 13 is near the cutoff edge 36a of the upper internal reflective surface 36. The emitting surface 38 emits the light reflected by the upper internal reflective surface 36 forward in the front-to-rear direction.

[0022] The light guide / output unit 37 has a side reflector 40 at its left end. The side reflector 40 outputs light reflected by the curved reflective surface 35ea of ​​the end reflector surface 35E of the lower internal reflector 35 and then reflected by the upper internal reflector 36 in a side illumination direction Ds inclined to the right in the width direction with respect to the projection optical axis Lp (see FIG. 5 ). As will be described later, this side illumination direction Ds is the direction in which light forming a side illumination pattern Ps (see FIG. 7 , etc.) travels from the side reflector 40 to the side illumination region 13s on the projection incident surface 13a. Note that in FIG. 5 , to facilitate understanding of the side illumination direction Ds, the direction approximately centered on the light traveling from the side reflector 40 to the side illumination region 13s is shown as the side illumination direction Ds. The side reflector 40 is provided to protrude forward from the output surface 38 in the front-to-rear direction and has a side reflection surface 41 and a side emission surface 42.

[0023] The side reflection surface 41 is formed on the left surface in the width direction of the side reflection portion 40, and is made substantially flat in the first embodiment, and is inclined so as to approach the projection optical axis Lp as it approaches the projection lens 13. This side reflection surface 41 reflects light that has been reflected by the upper internal reflection surface 36 after being reflected by the reflective curved surface 35ea, toward the side emission surface 42. Note that the side reflection surface 41 may be one that utilizes total reflection, one that is subjected to a reflection treatment, or another configuration, as long as it reflects light as described above.

[0024] The side exit surface 42 is formed on the surface on the right side in the width direction from the tip of the side reflecting portion 40, and in Example 1, is a convex surface that protrudes toward the projection lens 13. The side exit surface 42 emits the light reflected by the side reflecting surface 41 in the side illumination direction Ds, and causes the light to proceed to a side illumination region 13s on a projection incident surface 13a of the projection lens 13, which will be described later.

[0025] The optical settings of the side reflection surface 41 and the side emission surface 42 are determined in consideration of the optical settings of the projection lens 13 so that the emitted light forms a side illumination pattern Ps (see FIG. 7 , etc.) that illuminates the sides of a central illumination pattern Pc (see FIG. 6 , etc.) described later. Specifically, the settings are as follows: First, an area for the side illumination pattern Ps to be formed is set on a screen where the horizontal line H and the vertical line V intersect, with the center position O of illumination (the projection optical axis Lp of the vehicular lamp 10) as the origin (see FIG. 7 , etc.). Next, the traveling direction (angle) for the light emitted from the projection lens 13 to travel to both horizontal end positions of the side illumination pattern Ps is determined. Then, an angular range for the light from the side emission surface 42 to travel in the above-mentioned traveling direction is determined, and the optical settings (curvature, inclination angle, etc.) of the side reflection surface 41 and the side emission surface 42 are determined to satisfy this angular range. In Example 1, the side reflection surface 41 is made substantially flat, and its inclination angle is set so that the light is reflected toward the side illumination region 13s. The curvature of the side emission surface 42 is set so that the reflected light, when emitted from the side emission surface 42, is incident on the side illumination region 13s while satisfying the above-mentioned angle range. The side emission surface 42 in Example 1 is made convex, so that the emitted light intersects with the side emission surface 42 and then enters the side illumination region 13s of the projection lens 13.

[0026] As shown in FIGS. 1 to 5 , the projection lens 13 is provided forward of the exit surface 38 (light guide exit portion 37) of the light guide lens 12 in the front-rear direction. The projection lens 13 projects light emitted from the exit surface 38 toward the front of the vehicle to form a desired projection light distribution pattern (a low-vehicle light distribution pattern LP (see FIG. 8 ) in the first embodiment). The projection lens 13 is a molded part made of a transparent resin material. The projection lens 13 is a convex lens that is inclined toward the rear as it extends to the right. More specifically, the projection lens 13 is a biconvex convex lens that includes a projection incident surface 13a and a projection exit surface 13b that are single curved surfaces. The projection incident surface 13a has a larger curvature, while the projection exit surface 13b has a smaller curvature than the projection incident surface 13a. Here, the single curved surface means that there is no bend and the curvature changes continuously. The projection incident surface 13a has a protruding end displaced to the right in the width direction. The projection exit surface 13b has a gently curved surface that is positioned rearmost on the right side in the width direction and gradually curves forward as it moves leftward. With the above-described configuration, the projection lens 13 has approximately half of the left side of the projection incident surface 13a inclined toward the side exit surface 42 of the side reflector 40, forming a side illumination region 13s facing the side exit surface 42. The side illumination region 13s is a portion of the projection incident surface 13a onto which light that travels from the side reflector 40 in the side illumination direction Ds to form the side illumination pattern Ps is incident. Note that the side illumination region 13s also receives a portion of the light that is emitted from the exit surface 38 and forms the central illumination pattern Pc; it is not the only light that travels from the side reflector 40 in the side illumination direction Ds that is incident onto the side illumination region 13s.

[0027] The projection lens 13 has a focal point (rear focal point) positioned near the cutoff edge 36a of the upper internal reflective surface 36, with the light passing through the exit surface 38 (light guide exit portion 37) of the light guide lens 12. The projection lens 13 projects the shape of the upper internal reflective surface 36, including the cutoff edge 36a, onto the screen by irradiating light from the exit surface 38. The projection lens 13 also irradiates light that is reflected by the side reflector 40 and then emitted from the exit surface 38, and projects the light onto the screen.

[0028] When each light source 21 is turned on, the vehicle lamp 10 causes the light to travel from the corresponding light guide entrance portion 31 into the light guide lens 12, where it is reflected by the lower internal reflective surface 35 and the upper internal reflective surface 36, and then emitted from the exit surface 38 of the light guide exit portion 37. This light is reflected by the upper internal reflective surface 36, thereby reflecting the shape of the cutoff edge 36a. The vehicle lamp 10 then projects this light using the projection lens 13. As a result, as shown in FIG. 6 , the vehicle lamp 10 can form a central irradiation pattern Pc on the screen, which has a cutoff line CL on the projection optical axis Lp and brightens the area near the projection optical axis Lp and a large area below the cutoff line CL in the width direction.

[0029] At this time, the vehicle lamp 10 causes light emitted from the edge light source 21E located on the leftmost side of the five light sources 21 to travel from the corresponding light guide entrance portion 31 into the light guide lens 12, and then causes the light to travel to the edge reflecting surface portion 35E of the lower internal reflecting surface 35. A portion of the light is reflected by the reflective curved surface 35ea of ​​the edge reflecting surface portion 35E and travels upward in the vertical direction, and then reflected by the upper internal reflective surface 36 and travels forward in the longitudinal direction, and then travels to the side reflecting portion 40. Then, as shown in FIG. 5 , a portion of the light is reflected by the side reflecting surface 41 and emitted from the side exit surface 42 in the side illumination direction Ds, so that it enters the projection lens 13 from the side illumination region 13s on the projection entrance surface 13a and is emitted from the projection exit surface 13b. At this time, because the side exit surface 42 and the side illumination region 13s are opposed to each other, the angle of incidence of that portion of the light with respect to the side illumination region 13s can be made small, and the light can be reliably incident on the projection lens 13. This portion of the light irradiates a large area to the right in the width direction beyond the projection optical axis Lp, thereby forming a side illumination pattern Ps located to the side of the central illumination pattern Pc, as shown in Fig. 7. This side illumination pattern Ps partially overlaps with the central illumination pattern Pc and brightens a wide area to the right in the width direction (see Fig. 8).

[0030] By lighting the five light sources 21, this vehicle lamp 10 can form a central irradiation pattern Pc having a cutoff line CL and a side irradiation pattern Ps that partially overlaps the central irradiation pattern Pc and extends to the right in the width direction, as shown in FIG. 8 . The central irradiation pattern Pc and the side irradiation pattern Ps form a low-passing light distribution pattern LP that has a cutoff line CL and brightens a wide area in the width direction. The low-passing light distribution pattern LP serves as a projected light distribution pattern that illuminates the area ahead of the vehicle, illuminating a wide area in the width direction and ensuring a wide field of view. Note that the central irradiation pattern Pc includes a cutoff line CL, so it can function alone as a low-passing light distribution pattern. However, by cooperating with the side irradiation pattern Ps to form the low-passing light distribution pattern LP, a wider area can be illuminated. In this way, the vehicle lamp 10 can form the side illumination pattern Ps by utilizing part of the light from the five light sources 21 used to form the central illumination pattern Pc, allowing the passing light distribution pattern LP to illuminate a wider range of positions.

[0031] Here, the vehicle lamp 10 allows light from each light source 21 to be incident from each light guide incident portion 31, so that the light from each light source 21 with a wide spread can be efficiently incident on the light guide lens 12. In addition, the light guide lens 12 in the vehicle lamp 10 forms a cutoff line CL while totally reflecting the incident light on the lower internal reflective surface 35 and the upper internal reflective surface 36, so that the light can be efficiently used to form a light distribution pattern for passing vehicles.

[0032] Furthermore, the vehicular lamp 10 can form a passing light distribution pattern LP that illuminates a wide range of positions using the light guide lens 12 and the projection lens 13 made of a transparent resin material, thereby achieving a simple configuration and reducing manufacturing costs. This is due to the following reasons. To form a passing light distribution pattern LP in a vehicular lamp, it is possible to use a reflector member that reflects light from a light source and a shade member that forms a cutoff line, which increases the number of parts and requires the preparation of materials tailored to each component. However, the vehicular lamp 10 only has two optical components, the light guide lens 12 and the projection lens 13, both of which are made of a transparent resin material. The vehicular lamp 10 forms a cutoff line CL by utilizing the shape (cutoff edge 36a) of the upper internal reflective surface 36 of the light guide lens 12. Therefore, the vehicular lamp 10 can form a passing light distribution pattern LP that illuminates a wide range of positions while maintaining a simple configuration and reducing manufacturing costs.

[0033] Here, we will explain the technical challenges of conventional vehicle lighting fixtures. Conventional vehicle lighting fixtures use a projection lens configured by connecting multiple lens sections with different optical characteristics in the width direction. This conventional vehicle lighting fixture can tune the optical characteristics of each lens section to the location to be illuminated, allowing it to illuminate a wide horizontal position. However, conventional vehicle lighting fixtures have a complex projection lens, which increases manufacturing costs. Therefore, it is conceivable to avoid this complexity and suppress the increase in manufacturing costs by using a projection lens configured with a single curved entrance surface and exit surface for vehicle lighting fixtures. However, when a vehicle lighting fixture has a single curved entrance surface and exit surface, it is difficult to irradiate light to a position away from the projection optical axis in the horizontal direction, making it difficult to illuminate a wide position.

[0034] In contrast, the vehicle lamp 10 of the present disclosure has a side reflecting portion 40 at the left end of the light guide output portion 37 of the light guide lens 12. The side reflecting portion 40 reflects at least a portion of the light from the end light source 21E, causing the light to travel from the side reflecting surface 41 in a side illumination direction Ds approaching the projection optical axis Lp. The vehicle lamp 10 then causes the light to enter the projection lens 13 from a side illumination region 13s on the projection input surface 13a, and projects the light from the projection lens 13. That is, the vehicle lamp 10 reflects the light at a side output surface 42 located closer to the projection lens 13 than the light sources 21, causing the light to enter the projection lens 13 in the side illumination direction Ds, which has a larger angle with respect to the projection optical axis Lp. The vehicle lamp 10 then projects the light via the projection lens 13 to the opposite side (right side) beyond the projection optical axis Lp. Therefore, the vehicle lighting fixture 10 can irradiate light to a position away from the projection optical axis Lp in the horizontal direction, even though the projection lens 13 is composed of a single curved projection entrance surface 13a and a projection exit surface 13b.

[0035] Furthermore, by providing the side reflecting portion 40 protruding forward from the light guide lens 12, the vehicle lamp 10 allows light incident on the projection lens 13 at a large angle relative to the projection optical axis Lp. This allows light to be incident on the projection lens 13 at such an angle without increasing the size or complicating the configuration. This is due to the following: In order to allow light at the above angle to be incident on the projection lens 13, it is possible to provide a light source on an extension of that angle. However, providing a light source in such a position requires providing a board separate from the other four light sources, which complicates the configuration. It is also possible to extend the board to an extension of the above angle, but this would result in an increase in size.

[0036] Furthermore, the vehicular lamp 10 positions the end light source 21E and the side reflector 40 at the same position in the width direction, and directs at least a portion of the light from the end light source 21E forward in the front-to-rear direction, thereby traveling toward the side reflector 40. Therefore, the vehicular lamp 10 can collect the remaining light from each light source 21 near the cutoff edge 36a of the upper internal reflective surface 36, appropriately forming a cutoff line CL, while allowing the light to travel toward the side reflector 40. This allows the vehicular lamp 10 to appropriately form a passing light distribution pattern LP having a cutoff line CL over a wide range in the width direction. In particular, the vehicular lamp 10 can simply direct light toward the side reflector 40 by simply changing the optical characteristics of the reflective curved surface 35ea of ​​the end reflective surface portion 35E of the lower internal reflective surface 35 from those of the other lower internal reflective surfaces 35 (including the reflective curved surfaces 35eb and 35ec).

[0037] In the vehicle lamp 10, the projection lens 13 has a projection exit surface 13b that is a convex lens that is inclined rearward as it extends to the right, while the projection entrance surface 13a is a convex surface with a large curvature whose protruding end is displaced to the right in the width direction. Therefore, in the vehicle lamp 10, the side illumination area 13s of the projection entrance surface 13a can be inclined so as to be directed toward the side exit surface 42 of the side reflector 40, and the side illumination area 13s can be made to face the side exit surface 42. This allows the vehicle lamp 10 to reduce the angle of incidence of light emitted from the side exit surface 42 of the side reflector 40 with respect to the side illumination area 13s, ensuring that the light enters the projection lens 13 reliably.

[0038] The vehicle lamp 10 includes a side reflector 40 on the light guide exit portion 37 of the light guide lens 12. Therefore, the vehicle lamp 10 requires only the light source unit 11, the light guide lens 12, and the projection lens 13 to be assembled. There is no need to provide additional assembly components or structures just for the side reflector 40, reducing the number of assembly components and simplifying the assembly process. Furthermore, the vehicle lamp 10 has a predetermined positional relationship between the side reflector 40 and each of the light guide entrance portions 31 and the exit surface 38 (light guide exit portion 37). This eliminates the need for positioning adjustments and increases the accuracy of the positional relationship. Furthermore, the vehicle lamp 10 can efficiently guide light incident on the light guide lens 12 to the side reflector 40.

[0039] In the vehicle lamp 10, the side exit surface 42 of the side reflector 40 is convex, so the tip can be rounded while ensuring the dimension in the width direction of the side reflector 40. Therefore, in the vehicle lamp 10, the degree of diffusion of light that becomes the side illumination region 13s can be adjusted by the shape (degree of curvature) of the convex surface, and the light guide lens 12 can be easily molded using a mold.

[0040] The vehicle lamp 10, which is one example of a vehicle lamp according to the present disclosure, can achieve the following effects.

[0041] The vehicle lamp 10 includes a light guide lens 12 that guides light from a plurality of light sources 21 arranged in the width direction, and a projection lens 13 that projects the guided light to form a projected light distribution pattern (low-vehicle light distribution pattern LP) that illuminates the area ahead of the vehicle. The light guide lens 12 has a side reflecting portion 40 that partially protrudes toward the projection lens 13. The side reflecting portion 40 reflects at least a portion of light from an edge light source 21E located at an end of the plurality of light sources 21 toward the projection incident surface 13a of the projection lens 13 in a side illumination direction Ds so as to travel toward the horizontal end of the projected light distribution pattern. Therefore, the vehicle lamp 10 can reflect light at the side reflecting portion 40, which is located closer to the projection lens 13 than the light sources 21 due to the light guide lens 12 partially protruding toward the projection lens 13, and thereby allow the light to enter the projection lens 13 in the side illumination direction Ds that is at a larger angle with respect to the projection optical axis Lp. As a result, the vehicle lighting fixture 10 can irradiate light horizontally to a position away from the projection optical axis Lp, even though the projection lens 13 is composed of a single curved projection entrance surface 13a and projection exit surface 13b.

[0042] Furthermore, in the vehicle lamp 10, the side reflecting portion 40 has a side reflecting surface 41 that reflects at least a portion of the light from the end light source 21E, and a side exit surface 42 that emits the light reflected by the side reflecting surface 41. The side reflecting surface 41 is inclined so as to approach the projection optical axis Lp as it approaches the projection lens 13. In this vehicle lamp 10, by reflecting at least a portion of the light from the end light source 21E on the side reflecting surface 41 of the side reflecting portion 40, the side illumination direction Ds can be set at a larger angle with respect to the projection optical axis Lp, and the light in the side illumination direction Ds can be emitted from the side exit surface 42 toward the side illumination region 13s.

[0043] Furthermore, the vehicle lamp 10 has a projection entrance surface 13a that is a convex surface that protrudes toward the light guide lens 12. Therefore, the vehicle lamp 10 can tilt the side illumination area 13s of the projection entrance surface 13a so that it is directed toward the side emission surface 42 of the side reflector 40, making it possible to reduce the angle of incidence of the light emitted from the side emission surface 42 with respect to the side illumination area 13s and ensuring that the light is incident on the projection lens 13.

[0044] In the vehicle lamp 10, the side reflecting portion 40 reflects light toward the side illumination region 13s that faces the side emission surface 42 on the projection entrance surface 13a. Therefore, the vehicle lamp 10 can make the angle of incidence of the light emitted from the side emission surface 42 of the side reflecting portion 40 with respect to the side illumination region 13s more appropriate, and can more reliably make the light enter the projection lens 13.

[0045] The vehicular lamp 10 projects a low-passing light distribution pattern LP having a cutoff line CL as a light distribution pattern. The vehicular lamp 10 includes a light-guiding lens 12 having a light-guiding entrance portion 31 that receives light from each light source 21, a first internal reflective surface (lower internal reflective surface 35) that reflects the light incident thereon in a direction intersecting the optical axis direction along the projection optical axis Lp, a second internal reflective surface (upper internal reflective surface 36) that reflects the light reflected thereon back toward the optical axis direction, and a light-guiding exit portion 37 that outputs the light reflected thereon. The second internal reflective surface (upper internal reflective surface 36) has a cutoff edge 36a that forms the cutoff line CL. Therefore, the vehicular lamp 10 is configured to form the cutoff line CL of the low-passing light distribution pattern LP by reflection at the internal reflective surface, while illuminating a wide range of positions with the low-passing light distribution pattern LP.

[0046] Therefore, the vehicle lamp 10 of Example 1, which is a vehicle lamp according to the present disclosure, can illuminate a wide range of positions horizontally using a projection lens 13 in which the projection entrance surface 13a and the projection exit surface 13b are a single curved surface.

[0047] Next, a vehicle lamp 10A according to a second embodiment of the present disclosure will be described with reference to Figures 9 to 16. The basic concept and configuration of the vehicle lamp 10A are similar to those of the vehicle lamp 10 according to the first embodiment, and therefore the same components are designated by the same reference numerals and detailed descriptions thereof will be omitted.

[0048] First, the vehicular lamp 10A of the second embodiment has the same configuration for both the left and right sides of the vehicle. In the light source unit 11 of the second embodiment, the first light source 211 and the fifth light source 215, which are positioned at both ends in a side-by-side arrangement, are defined as edge light sources 21E. The light emitted from each edge light source 21E is used to form a respective side illumination pattern Ps (see FIG. 15 , etc.).

[0049] This vehicle lamp 10A has a different configuration from the vehicle lamp 10 of Example 1 in terms of the light guide lens 12A and the projection lens 13A. As shown in Figures 9 to 13, the light guide lenses 12A are provided corresponding to the five light sources 21 of the light source section 11 and are molded articles made of a transparent resin material. The light guide lenses 12A are optical lenses that guide light emitted from each light source 21 inward and form a projected light distribution pattern (low-vehicle light distribution pattern LP (see Figure 16)) in cooperation with the projection lens 13A. The light guide lens 12A has five light guide entrance sections 31 on the rear side in the fore-and-aft direction.

[0050] Each light guiding entrance section 31 corresponds to a respective light source 21, and while basically having the same configuration, has optical characteristics (surface shape, etc.) according to the desired light distribution image. As in the first embodiment, each light guiding entrance section 31 allows light from the corresponding light source 21 to enter through the opposing entrance surface 32, and also allows the light to enter through the inclined entrance surface 33, and then reflects off the annular reflecting surface 34, causing the light to enter the light guiding lens 12A as parallel light traveling approximately parallel to the axis of the light guiding entrance section 31. Each light travels toward the light guiding exit section 37A of the light guiding lens 12A.

[0051] The light guide output section 37A is provided in front of the five light guide input sections 31 in the front-rear direction. The light guide output section 37A is curved concavely so that its center in the width direction (projection optical axis Lp) is located at the rearmost side in the front-rear direction and both ends in the width direction are located at the frontmost side in the front-rear direction, and the curved concave surface serves as an output surface 38A. The output surface 38A is positioned to face the three middle ones of the five light guide input sections 31 in the front-rear direction and is configured to roughly follow the shape of the image plane of the projection lens 13A.

[0052] The lower edge of the light exit surface 38A is a cutoff edge 38Aa. This cutoff edge 38Aa forms the cutoff line CL and has a shape in which horizontal edges of different heights are joined by an inclined edge. This cutoff edge 38Aa is located near the focal point (rear focal point) of the projection lens 13A. When light enters the light exit surface 38A from the three central light guide entrance sections 31, the light exit surface 38A is brightened by emitting the light. In this case, the light exit surface 38A does not emit light that travels below the cutoff edge 38Aa, so the lower side conforms to the shape of the cutoff edge 38Aa. Regardless of which side of the vehicle the vehicle lamp 10A is installed on, the relationship between the direction of inclination and the height of the cutoff edge 38Aa of the light exit surface 38A is not reversed in the width direction.

[0053] The light-guiding output section 37A is provided with side reflecting sections 40A on both sides in the width direction. The side reflecting sections 40A emit the light emitted from the two end light sources 21E and incident on the corresponding light-guiding input sections 31 in a side illumination direction Ds inclined with respect to the projection optical axis Lp (see FIG. 13 ). Each side reflecting section 40A is provided such that both end sections of the light-guiding output section 37A protrude forward in the front-to-rear direction, and has a side reflecting surface 41A and a side output surface 42A.

[0054] Each side reflection surface 41A is formed on both side surfaces located outward in the width direction of the light guide output section 37A, and is generally flat in the first embodiment, and is inclined so as to approach the projection optical axis Lp as it approaches the projection lens 13A. Each side reflection surface 41A is located in front of the two end light sources 21E and the corresponding light guide input sections 31 in the front-rear direction, and reflects light from each of the end light sources 21E in a side illumination direction Ds that approaches the projection optical axis Lp. Note that the side reflection surface 41A may be configured to utilize total reflection, to be subjected to a reflection treatment, or in any other manner, as long as it reflects light as described above.

[0055] The side exit surface 42A is formed by a surface of the corresponding side reflecting portion 40A on the projection optical axis Lp side, and is positioned in the side illumination direction Ds in which light reflected by the side reflecting surface 41A travels. In the first embodiment, the side exit surface 42A is a concave surface that continues from the exit surface 38A. The side exit surface 42A emits the light reflected by the side reflecting surface 41A in the inclined side illumination direction Ds, and causes the light to travel toward a side illumination region 13As on a projection incident surface 13Aa (described later) of the projection lens 13A.

[0056] The optical settings of the side reflection surface 41A and the side emission surface 42A are determined in consideration of the optical settings of the projection lens 13A so that the emitted light forms side illumination patterns Ps1 and Ps2 (see FIG. 16, etc.) that illuminate the sides of the central illumination pattern Pc (see FIG. 14, etc.). The side emission surface 42A in Example 2 is made concave, so that the light reflected by the side reflection surface 41A is spread and made incident on the side illumination area 13As of the projection lens 13A.

[0057] As shown in FIGS. 9 to 13 , the projection lens 13A is provided forward of the exit surface 38A (light guide exit portion 37A) of the light guide lens 12A in the front-rear direction. The projection lens 13A projects light emitted from the exit surface 38A forward of the vehicle to form a desired projection light distribution pattern (a low-vehicle light distribution pattern LP (see FIG. 16 ) in the first embodiment). The projection lens 13A is a molded product made of a transparent resin material. The projection lens 13A is a biconvex convex lens having a single curved projection incident surface 13Aa and a single curved projection exit surface 13Ab. The projection incident surface 13Aa has a larger curvature than the projection exit surface 13Ab, and the curvature of the projection exit surface 13Ab is smaller than that of the projection incident surface 13Aa. The single curved surface means that there is no bend and the curvature changes continuously. The projection incident surface 13Aa and the projection exit surface 13Ab have their protruding ends positioned at the center in the width direction. In this projection lens 13A, due to the above-mentioned configuration, both ends of the projection incident surface 13Aa in the width direction are inclined so as to face the side exit surface 42A of each side reflecting section 40A, and a side illumination area 13As is formed opposite the side exit surface 42A.

[0058] The projection lens 13A has a focal point (rear focal point) located near the cutoff edge 38Aa on the exit surface 38A of the light guide lens 12A. The projection lens 13A projects the shape of the exit surface 38A, including the cutoff edge 38Aa, onto the screen by irradiating light from the exit surface 38A. The projection lens 13A also irradiates light that is reflected by the side reflecting portion 40A and then emitted from the exit surface 38A, and projects the light onto the screen.

[0059] When each light source 21 in the vehicular lamp 10A is turned on, the light travels from the corresponding light guide entrance portion 31 into the light guide lens 12A and is emitted from the exit surface 38A of the light guide exit portion 37A. This light reflects the shape of the cutoff edge 38Aa of the exit surface 38A. The vehicular lamp 10A then projects the light using the projection lens 13A. As shown in FIG. 14 , the vehicular lamp 10A forms a first central irradiation pattern Pc1 having a cutoff line CL with light from the third light source 213. Furthermore, the vehicular lamp 10A forms a second central irradiation pattern Pc2 with light from the second light source 212 that overlaps with the first central irradiation pattern Pc1 but is shifted to the right of it. Furthermore, the vehicular lamp 10A forms a third central irradiation pattern Pc3 with light from the fourth light source 214 that overlaps with the first central irradiation pattern Pc1 but is shifted to the left of it. By overlapping these, the vehicle lamp 10A can form a central irradiation pattern Pc on the above-mentioned screen, which has a cutoff line CL on the projection optical axis Lp, and which brightens the area near the projection optical axis Lp most while brightening a large area in the width direction below the cutoff line CL.

[0060] 13 , in the vehicle lamp 10A, when light emitted from the two end light sources 21E (first light source 211 and fifth light source 215) located at both ends travels from the corresponding light guide entrance portions 31 into the light guide lens 12A, each light travels to the corresponding side reflecting portion 40A. Each light is reflected by the side reflecting surface 41 and emitted from the side exit surface 42A in the side illumination direction Ds, so that it enters the projection lens 13A from the side illumination region 13As on the projection entrance surface 13Aa and is emitted from the projection exit surface 13Ab. At this time, because the side exit surface 42A and the side illumination region 13As are opposed to each other, the angle of incidence of each light with respect to the side illumination region 13As can be made small, and the light can be reliably incident on the projection lens 13A.

[0061] Then, the light from the first light source 211 irradiates a large area to the right in the width direction beyond the projection optical axis Lp, thereby forming a first side irradiation pattern Ps1 located to the right of the central irradiation pattern Pc, as shown in Fig. 15. This first side irradiation pattern Ps1 partially overlaps with the central irradiation pattern Pc and illuminates a wide area to the right in the width direction (see Fig. 16).

[0062] Furthermore, the light from the fifth light source 215 irradiates a large area to the left in the width direction beyond the projection optical axis Lp, thereby forming a second side irradiation pattern Ps2 located to the left of the central irradiation pattern Pc. This second side irradiation pattern Ps2 partially overlaps with the central irradiation pattern Pc and illuminates a wide area to the left in the width direction (see FIG. 16 ).

[0063] By lighting the five light sources 21, this vehicle lamp 10A can form a central irradiation pattern Pc having a cutoff line CL and two side irradiation patterns (Ps1, Ps2) that partially overlap the central irradiation pattern Pc and extend outward in the width direction, as shown in FIG. 16 . The central irradiation pattern Pc and the side irradiation patterns (Ps1, Ps2) form a low-passing light distribution pattern LP that has a cutoff line CL and brightens a wide area in the width direction. The low-passing light distribution pattern LP serves as a projected light distribution pattern that illuminates the area ahead of the vehicle, illuminating a wide area in the width direction and ensuring a wide field of view. Note that the central irradiation pattern Pc includes a cutoff line CL, so it can function alone as a low-passing light distribution pattern. However, by cooperating with the side irradiation patterns (Ps1, Ps2) to form the low-passing light distribution pattern LP, a wider area can be illuminated. In this way, the vehicle lamp 10A can form a side illumination pattern Ps by utilizing part of the light from the five light sources 21 arranged in the width direction, and can make the passing light distribution pattern LP illuminate a wider range of positions.

[0064] The vehicle lamp 10A allows light from each light source 21 to enter through each light guide entrance portion 31, so that the light from each light source 21, which has a wide spread, can be efficiently incident on the light guide lens 12. Furthermore, the light guide lens 12 in the vehicle lamp 10A allows the incident light to travel directly to the exit surface 38A of the light guide exit portion 37A, so that the light can be efficiently used to form the passing light distribution pattern LP.

[0065] In the vehicle lamp 10A, the side emission surface 42A of the side reflecting portion 40A is concave, and the emission surface 38A of the light guide emission portion 37A is also concave, and these are formed as a continuous curved surface. Therefore, in the vehicle lamp 10A, the emission surface 38A and the side emission surface 42A can be easily formed, and the light guide lens 12A can be easily molded using a mold.

[0066] The vehicular lamp 10A of the second embodiment can achieve the following effects. Since the vehicular lamp 10A has basically the same configuration as the vehicular lamp 10 of the first embodiment, it can achieve the same effects as the first embodiment.

[0067] In addition, the vehicular lamp 10A projects a low-passing light distribution pattern LP having a cutoff line CL as a light distribution pattern. The vehicular lamp 10 further includes a light guide lens 12A having a light guide entrance portion 31 that receives light from the multiple light sources 21 and a light guide exit portion 37A that emits the light received from the light guide entrance portion 31. The light guide exit portion 37A has a cutoff edge portion 38Aa that forms the cutoff line CL. The vehicular lamp 10A is thus configured to form the cutoff line CL of the low-passing light distribution pattern LP by emitting light from the light guide exit portion 37A, while illuminating a wide range of positions with the low-passing light distribution pattern LP.

[0068] Therefore, the vehicle lamp 10A of Example 2, which is a vehicle lamp according to the present disclosure, can illuminate a wide range of positions horizontally using a projection lens 13A in which the projection entrance surface 13Aa and the projection exit surface 13Ab are a single curved surface.

[0069] The vehicle lamp of the present disclosure has been described above based on each embodiment, but the specific configuration is not limited to each embodiment, and design changes and additions are permitted as long as they do not deviate from the gist of the invention according to each claim in the scope of the claims.

[0070] The vehicular lamp 10 of Example 1 forms the side illumination pattern Ps with a portion of the light from the edge light sources 21E, and the vehicular lamp 10A of Example 2 forms each side illumination pattern Ps with the entire light from each edge light source 21E. However, the vehicular lamp 10 of Example 1 may use the entire light from the edge light sources 21E, and the vehicular lamp 10A of Example 2 may use a portion of the light from the edge light sources 21E, and the configurations of the above-described examples are not limited to these.

[0071] In addition, in each of the above-described embodiments, the passing light distribution pattern LP is formed using five light sources 21. However, as long as a passing light distribution pattern LP that can illuminate a wide range of positions in the width direction is formed using multiple light sources in the width direction, the number of light sources can be set appropriately and is not limited to the configurations of the above-described embodiments.

[0072] Furthermore, in each of the above-described embodiments, a low-vehicle light distribution pattern LP having a cutoff line CL is formed as the projected light distribution pattern. However, the projected light distribution pattern may be a driving light distribution pattern that illuminates above the cutoff line or another light distribution pattern, as long as it illuminates a wide position in the width direction in front of the vehicle, and is not limited to the configuration of each of the above-described embodiments.

[0073] The vehicular lamp 10 of Example 1 forms a central irradiation pattern Pc with light from the four light sources 21 and a portion of the light from the first light source 211 that serves as the edge light source 21E, and forms a side irradiation pattern Ps with the remaining portion of the light from the first light source 211. Furthermore, the vehicular lamp 10A of Example 2 forms central irradiation patterns (Pc1, Pc2, Pc3) with the three middle light sources 21, and forms side irradiation patterns (Ps1, Ps2) with light from the first light source 211 that serves as the edge light source 21E and the fifth light source 215, respectively. However, as long as a side irradiation pattern is formed in the outermost region of the projected light distribution pattern with at least a portion of the light from the edge light source 21E, the configuration and shape of the central irradiation pattern for each light source may be set as appropriate and are not limited to the configurations of the respective Examples.

[0074] In each of the above-described embodiments, the light guide lenses 12, 12A and the projection lenses 13, 13A are configured separately. However, the light guide lenses 12, 12A and the projection lenses 13, 13A may be configured as an integrated member as long as they function as described above, and are not limited to the configurations of the respective embodiments. CROSS-REFERENCE TO RELATED APPLICATIONS

[0075] This application claims priority based on Japanese Patent Application No. 2023-219781, filed with the Japan Patent Office on December 26, 2023, the entire disclosure of which is incorporated herein by reference in its entirety.

Claims

1. A vehicle lamp comprising: a light-guiding lens that guides light from a plurality of light sources arranged in the width direction; and a projection lens that projects the light guided by the light-guiding lens to form a projected light distribution pattern that illuminates the front of the vehicle, wherein the light-guiding lens has a side reflecting portion that partially protrudes toward the projection lens, and the side reflecting portion reflects at least a portion of the light from an end light source located at an end of the plurality of light sources toward the projection entrance surface of the projection lens in a side illumination direction inclined with respect to the optical axis direction so as to cause the light to travel toward the horizontal end of the projected light distribution pattern.

2. The vehicle lamp according to claim 1, characterized in that the side reflecting portion has a side reflecting surface that reflects at least a portion of the light from the end light source, and a side exit surface that emits the light reflected by the side reflecting surface, and the side reflecting surface is inclined so as to approach the projection optical axis as it moves toward the projection lens.

3. The vehicle lamp according to claim 2, wherein the projection incidence surface is a convex surface that protrudes toward the light guide lens.

4. The vehicle lamp according to claim 3, wherein the side reflecting portion reflects light toward a side illumination area that faces the side exit surface on the projection entrance surface.

5. The vehicle lamp described in claim 1, characterized in that the projected light distribution pattern is a low-beam light distribution pattern having a cutoff line, the light-guiding lens has a light-guiding entrance section that receives light from the multiple light sources, a first internal reflective surface that reflects the light incident from the light-guiding entrance section in a cross direction that crosses the optical axis direction, a second internal reflective surface that reflects the light reflected by the first internal reflective surface in the optical axis direction, and a light-guiding exit section that exits the light reflected by the second internal reflective surface, the second internal reflective surface having a cutoff edge that forms the cutoff line.

6. The vehicle lamp according to claim 1, characterized in that the projected light distribution pattern is a low-beam light distribution pattern having a cutoff line, the light-guiding lens has a light-guiding entrance section which receives light from the plurality of light sources, and a light-guiding exit section which emits the light incident from the light-guiding entrance section, and the light-guiding exit section has a cutoff edge section which forms the cutoff line.

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