Lamp unit and vehicle lamp

Abstract

Provided are a lamp unit capable of forming an irradiation pattern in the vicinity of a vehicle while suppressing the size in the vertical direction, and a vehicle lamp using the lamp unit. The lamp unit (20) is provided with: an installation table part (21) which is arranged along a lamp unit axis (Ar) and is provided with a plurality of light sources (34, 35); a condenser lens (23) that condenses light from the plurality of light sources; a light-shielding member (24) provided with a plurality of slits (46) through which the light collected by the light-collecting lens partially passes; and a projection lens (25) that forms an irradiation pattern (Pi) having a plurality of irradiation patterns (Di) by projecting the light that has passed through the light shielding member. The projection lens (25) and the light shielding member (24) rotate downward about a reference focal point (Fb) set on a lamp unit axis (Ar), and the installation table (21) and the condenser lens (23) rotate downward about an installation table reference point (Ph) set rearward and upward from the reference focal point (Fb).

Description

Technical Field

[0001] The present disclosure relates to a lamp unit and a vehicle lamp. Background Art

[0002] Vehicle lamps consider using lamp units to form an illumination pattern on the road surface around the vehicle (for example, refer to Patent Documents 1 and 2). These existing lamp units form an illumination pattern by allowing light from a light source to pass through a slit portion of a light shielding component (lamp cover) and projected by a projection lens, so that a person who sees the illumination pattern can know the meaning expressed by the illumination pattern.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-102332

[0006] Patent Document 2: Japanese Patent Application Publication No. 2019-192349 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, when a vehicle lamp is mounted on a vehicle, a lamp unit or the like is generally provided along a vehicle axis set on the vehicle, and it is required to suppress the dimension in the up-down direction orthogonal to the vehicle axis.

[0009] However, conventional vehicle lamps form an illumination pattern on the road surface by setting the lamp unit composed of a light source, a light shielding member and a projection lens so that the lamp unit axis is tilted downward toward the road surface. Therefore, conventional vehicle lamps substantially increase the size of the lamp unit in the vertical direction.

[0010] The present disclosure has been made in view of the above-mentioned circumstances, and an object of the present disclosure is to provide a lamp unit capable of forming an illumination pattern near a vehicle while suppressing the size in the vertical direction, and a vehicle lamp using the lamp unit.

[0011] Solutions to Solve Problems

[0012] The vehicle lamp disclosed in the present invention is characterized in that it comprises: a setting table, which is arranged along the axis of the lamp unit and has a plurality of light sources; a focusing lens, which focuses light from the plurality of light sources; a shading component, which is provided with a plurality of slit portions for partially passing the light focused by the focusing lens; and a projection lens, which projects the light passing through the shading component to form an illumination pattern having a plurality of illumination patterns corresponding to the plurality of slit portions, the projection lens sets a reference focus on the axis of the lamp unit, the projection lens and the shading component rotate downwardly around the reference focus, and the setting table and the focusing lens rotate downwardly around a reference point of the setting table set at the rear and above the reference focus.

[0013] Effects of the Invention

[0014] According to the vehicle lamp of the present disclosure, it is possible to form an illumination pattern near the vehicle while suppressing the size in the up-down direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an explanatory diagram showing a state where the vehicle lamp according to the first embodiment of the present disclosure is mounted on a vehicle and forms respective illumination patterns.

[0016] Figure 2 It is an explanatory diagram showing a state in which a lamp unit in a vehicle lamp is viewed from the projection lens side in the axial direction.

[0017] Figure 3 It is an explanatory diagram showing a state where the lamp unit is viewed in the width direction.

[0018] Figure 4 It is an explanatory diagram showing the structure of a lamp unit in an exploded manner.

[0019] Figure 5 So along Figure 2 This is an explanatory diagram showing a cross section taken along line II shown.

[0020] Figure 6 It is an explanatory diagram showing the positional relationship between the first light source and the second light source in the light source unit.

[0021] Figure 7 It is an explanatory diagram showing the structure and positional relationship of the first slit portion, the second slit portion, and the third slit portion in the lampshade.

[0022] Figure 8 It is an explanatory diagram showing a state where the condenser lens is viewed from the light source side.

[0023] Fig. 9 It is an explanatory diagram showing a state where the condenser lens is viewed from the lamp housing side.

[0024] Fig.10 This is an explanatory diagram showing how, in the lamp unit, light from a first light source enters the first lens portion from an inclined incident surface, is reflected by a reflecting surface, and travels toward a projection lens via a lamp housing (its first slit portion and second slit portion) when viewed from the upper side in the vertical direction.

[0025] Fig.11 This is an explanatory diagram showing the distribution of light beams in a first irradiation area formed on the lampshade, of light from a first light source that enters the first lens portion from an oblique incident surface and is reflected by the reflecting surface and then emitted from the outer emitting surface portion.

[0026] Fig.12 This is an explanatory diagram showing how, in the lamp unit, light from a first light source enters a first lens portion from an opposing incident surface and then travels toward a projection lens via a lamp housing (its first slit portion and second slit portion) when viewed from the upper side in the vertical direction.

[0027] Fig.13 This is an explanatory diagram showing the distribution of light beams from the first light source, which is emitted from the opposing incident surface to the first lens portion and from the inner emission surface portion, in the second irradiation area formed on the lampshade.

[0028] Fig.14 This is an explanatory diagram showing how, in the lamp unit, light from a second light source enters the second lens portion from a second incident surface and then travels toward a projection lens via a lamp housing (third slit portion thereof) when viewed from the upper side in the vertical direction.

[0029] Fig.15 This is an explanatory diagram showing the distribution of light beams from the second light source in the third irradiation area formed on the lampshade, the light being incident from the second incident surface to the second lens portion and emitted from the second emission surface portion.

[0030] Fig.16 1 is an explanatory diagram showing distribution of light from the first lens portion of the condenser lens of the lamp unit of Comparative Example 1 on the projection lens.

[0031] Fig.17 1 is an explanatory diagram showing distribution of light from the second lens portion of the condenser lens of the lamp unit of Comparative Example 1 on the projection lens.

[0032] Fig.18 This is an explanatory diagram showing the distribution of light from the first lens portion of the condenser lens of the lamp unit of Example 1 on the projection lens.

[0033] Fig.19 This is an explanatory diagram showing the distribution of light from the second lens portion of the condenser lens of the lamp unit of Example 1 on the projection lens. DETAILED DESCRIPTION

[0034] Hereinafter, a lamp unit 20 and a first embodiment of a vehicle lamp 10 as an example of the vehicle lamp of the present disclosure will be described with reference to the drawings. Figure 1 In order to make it easier to understand that the vehicle lamp 10 is provided, the vehicle lamp 10 is shown emphatically on the vehicle 1, which may not be consistent with the actual situation. Figure 5 In the figure, the slits 46 of the lampshade 24 are omitted. Fig.10 , Fig.12 , Fig.14 In order to easily understand the light travel situation, the lampshade 24 is schematically shown, and in the focusing lens 23, the opposite incident surface 53, the inclined incident surface 54, the reflecting surface 55, the inner exit surface 57, the outer exit surface 58, the second incident surface 61 and the second exit surface 62 in the second lens portion 52, and the incident surface and the exit surface in the projection lens 25 are emphatically shown in the first lens portion 51, which have a greater optical influence. Fig.11 , Fig.13 , Fig.15 In FIG. 1 , the irradiation (light beam) distribution is represented by dividing the area corresponding to the height of the light beam (light amount) with lines, and the light beam is shown as a contour line with higher height toward the center of the area.

[0035] Example 1

[0036] use Figures 1 to 19 , a vehicle lamp 10 according to Example 1 of one embodiment of the vehicle lamp disclosed herein will be described. Figure 1 As shown, the vehicle lamp 10 of the first embodiment is a lamp of a vehicle 1 (the vehicle) such as an automobile. The vehicle lamp 10 is different from a signal lamp such as a reversing lamp (parking lamp) and a turn lamp provided on the vehicle 1, and forms an illumination pattern Pi on a road surface 2 in the rear periphery of the vehicle 1, and is provided at the rear of the vehicle 1. The distance of the rear periphery of the vehicle 1 from the vehicle 1 is determined according to laws and regulations, and as an example, is set to an area within 3 meters from the vehicle 1.

[0037] In the first embodiment, the vehicle lamp 10 constitutes a signal lamp such as a reverse lamp and a turn lamp installed on the vehicle 1. In the first embodiment, the reverse lamp is installed in pairs on the left and right sides of the rear side of the vehicle 1. In addition, the vehicle lamp 10 can also constitute other signal lamps, such as a headlight, a turn lamp, a tail lamp, etc., and is not limited to the first embodiment. The two vehicle lamps 10 are basically the same in structure except for the difference in the installation position and the position where the irradiation pattern Pi is formed, so they are only described as the vehicle lamp 10 below.

[0038] The vehicle lamp 10 is configured by installing a signal lamp unit and a lamp unit 20 in a lamp chamber surrounded by a lamp housing and a lamp lens. In the first embodiment, the vehicle lamp 10 is arranged at a position higher than a road surface 2 at the front end of the vehicle 1. The vehicle lamp 10 is provided with the lamp unit 20 in a state where the lamp unit axis Ar is substantially parallel to the road surface 2 (see FIG. Figure 2 , Figure 3 The lamp unit axis Ar is an axis parallel to the vehicle axis set in the vehicle 1, and is an axis that serves as a reference for the installation positions of the components of the lamp unit 20. In the following description, in the lamp unit 20, the direction in which the lamp unit axis Ar extends is set as the axial direction (set as Z in the drawings), the vertical direction when the axial direction is along the horizontal plane is set as the up-down direction (set as Y in the drawings), and the direction (horizontal direction) orthogonal to the axial direction and the up-down direction is set as the width direction (set as X in the drawings) (refer to Figure 2 , Figure 3 wait).

[0039] In the lamp unit 20, as Figures 2 to 5 As shown in FIG. 1 , a light source unit 22, a condenser lens 23, a lampshade 24, and a projection lens 25 are mounted on the mounting platform 21. The lamp unit 20 is a single projection optical system, and constitutes a projection type road surface projection unit. The mounting platform 21 is a portion where the light source unit 22 is mounted, and is formed of aluminum die casting or resin having thermal conductivity, and functions as a heat sink that releases heat generated by the light source unit 22 to the outside as a whole. The mounting platform 21 has a base 31 and a pair of mounting arms 32.

[0040] The base 31 is in the shape of a flat plate, and the light source 22 is mounted on the light source mounting portion in the middle. The light source mounting portion is a flat surface, and is provided with two threaded holes 31a and two positioning protrusions 31b. In addition, a plurality of heat dissipation fins 31c are provided in the base 31, and the heat generated by the light source 22 disposed in the light source mounting portion is mainly dissipated from each heat dissipation fin 31c to the outside. Among the heat dissipation fins 31c, the outermost heat dissipation fins in the width direction are provided with mounting ribs 31d (see FIG. 1 ). Figure 3 The mounting rib 31d is a long rod extending in the vertical direction and is perpendicular to the lamp unit axis Ar. The mounting stand 21 is mounted on the vehicle lamp 10 using the mounting rib 31d of the base 31 so that the lamp unit axis Ar is parallel to the vehicle axis.

[0041] A pair of mounting arms 32 are arranged in pairs on both outer sides in the width direction of the light source portion 22, and protrude orthogonally to the base portion 31 from the base portion 31 to the front side in the axial direction. The two mounting arms 32 are formed so that the ends on the front side in the axial direction are planes orthogonal to their own protruding direction (the reference axis a1 of the setting table described later). A positioning protrusion 32a and a threaded hole 32b are provided at each end. The positioning protrusion 32a is provided at the lower part of the end of each mounting arm 32 in the up-down direction, and protrudes to the front side in the axial direction. The threaded hole 32b is provided at the upper part of the end of each mounting arm 32 in the up-down direction, and can fix the focusing lens 23, the lampshade 24 and the projection lens 25 based on the screwing of the screw 33.

[0042] like Figure 5 As shown, in the setting stage 21, a setting stage reference point Ph is set near the substrate 36 (described later) of the light source unit 22 mounted on the base 31. In the setting stage 21, a line passing through the setting stage reference point Ph and orthogonal to the substrate 36 (light source mounting position) is set as the setting stage reference axis a1. The setting stage reference point Ph is set to be above the lamp unit axis Ar in the up-down direction. In addition, since the setting stage reference point Ph is near the substrate 36, it is set to be on the rear side of the axis direction (the direction in which the lamp unit axis Ar extends) than the reference focus Fb described later. Since the setting stage reference point Ph is near the substrate 36, it is located between the setting stage 21 and the focusing lens 23. In addition, the setting stage reference point Ph can be appropriately set as long as it is located between the setting stage 21 and the focusing lens 23. Here, the space between the installation stage 21 and the condenser lens 23 is not limited to the space sandwiched between them, but also includes the position overlapping the installation stage 21 and the condenser lens 23. The installation stage reference axis a1 of the installation stage 21 is tilted relative to the lamp unit axis Ar, and accordingly, the substrate 36 (light source mounting portion) is tilted relative to the lamp unit axis Ar. The tilt of the installation stage reference axis a1, that is, the installation stage 21 (substrate 36) will be described later.

[0043] like Figure 4 , Figure 5 As shown in the figures, the light source unit 22 includes a first light source 34, a second light source 35, and a substrate 36 for mounting the light sources. The two light sources (34, 35) are composed of light emitting elements such as LEDs (Light Emitting Diodes). In Example 1, the two light sources (34, 35) emit white light (white light) according to a Lambertian distribution centered on the emission light axis. In addition, the color (wavelength band), distribution method, number of colors, etc. of the two light sources (34, 35) can be appropriately set and are not limited to the structure of Example 1. Figure 6As shown in the figure, the two light sources (34, 35) of the first embodiment are located above the lamp unit axis Ar and arranged in a vertical direction. In addition, the first light source 34 is located on the lamp unit axis Ar side, and the second light source 35 is located above the first light source 34. The two light sources (34, 35) of the first embodiment are located above the reference axis a1 of the installation table and are substantially square in shape.

[0044] The substrate 36 is a plate-shaped substrate formed of a resin material such as a glass epoxy substrate, and each light source (34, 35) is installed. The substrate 36 is provided with two threaded through holes 36a corresponding to each threaded hole 31a of the light source installation part of the base part 31 where the stage part 21 is installed, and two positioning holes 36b are provided corresponding to each positioning protrusion 31b of the light source installation part. The substrate 36 is installed on the base part 31 by passing the positioning protrusion 31b corresponding to each positioning hole 36b and screwing the screw 37 passing through each threaded through hole 36a into the corresponding threaded hole 31a. Thus, the substrate 36 makes each light source (34, 35) installed face the focusing lens 23.

[0045] The substrate 36 is provided with a connector terminal 38 electrically connected to the wiring pattern. The connector terminal 38 is provided at the lower end of the substrate 36 in the vertical direction, and the connection connector can be easily attached and detached. The connector terminal 38 is provided with a connection connector, so that power can be supplied from the lighting control circuit via the wiring pattern to each light source (34, 35). Therefore, the substrate 36 is appropriately supplied with power from the lighting control circuit via the connector terminal 38 to appropriately light each light source (34, 35).

[0046] The focusing lens 23 is used to focus the light emitted from each light source (34, 35), and focuses the light around each slit portion 46 described later on the lampshade 24, that is, the area where three slit portions 46 are provided on the lampshade 24. The focusing lens 23 includes: a focusing lens body 41 that focuses the light from each light source (34, 35); and a pair of focusing lens mounting pieces 42 extending from the focusing lens body 41 in the width direction. The focusing lens body 41 and the focusing lens mounting pieces 42 are formed integrally, and in the first embodiment, they are formed integrally by resin molding. The focusing lens body 41 sets the optical characteristics in order to form a predetermined irradiation area on the lampshade 24. This will be described later.

[0047] The two condenser lens mounting pieces 42 are flat plate-shaped and can be closely attached to the ends of the two mounting arms 32 of the base portion 31 of the setting table 21. Each condenser lens mounting piece 42 is provided with a condenser lens positioning hole 42a and a condenser lens threaded through hole 42b. Each condenser lens positioning hole 42a can be embedded with the positioning protrusion 32a in a state where the condenser lens mounting piece 42 is closely attached to the ends of the two mounting arms 32. Each condenser lens threaded through hole 42b can pass the screw 33 screwed into the threaded hole 32b in a state where the condenser lens mounting piece 42 is closely attached to the ends of the two mounting arms 32. The condenser lens 23 is mounted on the two mounting arms 32 (ends thereof) of the setting table 21 by passing the positioning protrusion 32a corresponding to each condenser lens positioning hole 42a and screwing each screw 33 that has passed through each condenser lens threaded through hole 42b into the corresponding threaded hole 32b.

[0048] The lampshade 24 is an example of a light shielding member that forms an irradiation pattern Pi by partially passing the light from each light source (34, 35) after being condensed by the condenser lens 23 through each slit portion 46 described later. Figure 1 As shown, the irradiation pattern Pi has three irradiation patterns Di arranged at approximately equal intervals in the direction away from the vehicle 1. Here, when each irradiation pattern Di is shown separately, the irradiation pattern farthest from the vehicle 1 is set as the first irradiation pattern Di1, and from here, the second irradiation pattern Di2 and the third irradiation pattern Di3 are set in sequence as they approach the vehicle 1. In Example 1, each irradiation pattern Di is formed into a roughly rectangular shape with the vehicle 1 side as the short side, is formed into a roughly equal shape with roughly equal sizes, and is arranged at roughly equal intervals.

[0049] The illumination pattern Pi is formed by arranging a first illumination pattern Di1, a second illumination pattern Di2, and a third illumination pattern Di3 on the same straight line on the road surface 2 serving as the projection surface so as to be away from the vehicle 1. Therefore, the illumination pattern Pi is recognizable as a line of light extending in the direction in which the three illumination patterns Di are arranged. The illumination pattern Pi composed of the three illumination patterns Di is formed by the lampshade 24.

[0050] like Figure 4 , Figure 7As shown in the figures, the lampshade 24 is basically formed by a plate-shaped component that blocks the transmission of light, and has a lampshade portion 43 and a pair of lampshade mounting pieces 44. The lampshade mounting pieces 44 extend from the lampshade portion 43 to both sides in the width direction, and can be close to each condenser lens mounting piece 42 of the condenser lens 23 mounted on the ends of the two mounting arm portions 32 of the setting table portion 21. A lampshade positioning hole 44a and a lampshade threaded through hole 44b are provided in each lampshade mounting piece 44. Each lampshade positioning hole 44a can be embedded in the positioning protrusion 32a passing therethrough when the lampshade mounting piece 44 is close to the condenser lens mounting piece 42. Each lampshade threaded through hole 44b can allow the screw 33 passing through the condenser lens threaded through hole 42b to pass through when the lampshade mounting piece 44 is close to the condenser lens mounting piece 42. The lampshade 24 is mounted on the two mounting arms 32 of the installation base 21 via the condenser lens 23 by passing the positioning protrusions 32a corresponding to the lampshade positioning holes 44a and screwing the screws 33 passing through the lampshade threaded through holes 44b into the corresponding threaded holes 32b.

[0051] Here, if Figure 5 As shown, the lampshade 24 sets a lampshade reference point Ps at the center position of the lampshade portion 43, and a line passing through the lampshade reference point Ps and orthogonal to the lampshade portion 43 is set as the lampshade reference axis a2. The lampshade 24 is mounted on the two mounting arms 32 through the lampshade mounting piece 44, so that the lampshade reference point Ps of the lampshade portion 43 is located on the lamp unit axis Ar. The lampshade portion 43 is tilted in a manner that the upper part in the up-down direction is displaced toward the front side in the axial direction relative to the two lampshade mounting pieces 44, and is continuous with the two lampshade mounting pieces 44. Therefore, the lampshade portion 43 is mounted on the two mounting arms 32 of the setting platform 21 through the lampshade 24, so that the lampshade reference axis a2 is tilted relative to the setting platform reference axis a1. The tilt of the lampshade portion 43 will be described later.

[0052] The lampshade 43 is provided with a plurality of slits 46 which are penetrated by partially cutting off a plate-like member. Each slit 46 partially passes the light from each light source (34, 35) after being focused by the focusing lens 23 (its focusing lens body 41), thereby forming the projected irradiation pattern Pi into a predetermined shape. Each slit 46 of the first embodiment corresponds to the irradiation pattern Pi, and three slits are provided in the first embodiment.

[0053] The three slit portions 46 correspond to the three irradiation patterns Di in a one-to-one manner. Since the opening shapes of the slit portions 46 provided by the projection lens 25 in the lampshade 24 are inverted and projected onto the road surface 2, the positional relationship of the irradiation patterns Di relative to the irradiation pattern Pi becomes a rotationally symmetrical positional relationship with the projection lens optical axis Al described later as the center. Therefore, among the slit portions 46, the first slit portion 461 at the bottom in the vertical direction corresponds to the first irradiation pattern Di1 of the irradiation pattern Pi, the second slit portion 462 above it corresponds to the second irradiation pattern Di2, and the third slit portion 463 above it corresponds to the third irradiation pattern Di3.

[0054] The position and size of each slit portion 46 on the lampshade portion 43 are set so that each irradiation pattern Di has a targeted size and a targeted positional relationship on the road surface 2. Figure 7 As shown, the three slit portions 46 are located above the lamp unit axis Ar and arranged in a vertical direction. In the lampshade 24, the first slit portion 461 is located closest to the lamp unit axis Ar, the second slit portion 462 is located above the first slit portion 461, and the third slit portion 463 is located above the second slit portion 462. In addition, the first slit portion 461 and the second slit portion 462 correspond to the first light source 34, and the third slit portion 463 corresponds to the second light source 35. The center position C1 of the first slit portion 461 and the second slit portion 462 is located below the first light source 34 (the center position C2 thereof) in the vertical direction. The center position C1 of the first slit portion 461 and the second slit portion 462 is the position that becomes the center in the vertical direction in the region where they are provided, and in the embodiment 1, it is located near the lower end of the first light source 34. In addition, the center position C3 of the third slit portion 463 is located below the center position C4 of the second light source 35 in the vertical direction. Therefore, each slit portion 46 is located below the corresponding light source ( 34 , 35 ) when viewed from the respective center positions ( C1 to C4 ). The light transmitted through the lampshade 24 (each slit portion 46 ) is projected onto the road surface 2 by the projection lens 25 .

[0055] Each of the slit portions 46 has a substantially trapezoidal shape. The three slit portions 46 form the above-mentioned irradiation patterns Di on the road surface 2. Figure 1In the embodiment 1, the first slit 461 is a substantially trapezoidal shape with the smallest size and substantially equal intervals, and the size, shape and interval are set in accordance with the distance to the road surface 2. That is, since the optical distance from each slit portion 46 to the road surface 2 through the projection lens 25 is different, when the projection lens 25 is projected onto the road surface 2, each slit portion 46 (each irradiation pattern Di of the light passing therethrough) becomes a size and interval corresponding to the distance. In the embodiment 1, the first slit portion 461 is a substantially trapezoidal shape with the smallest size, the second slit portion 462 is a substantially trapezoidal shape larger than the first slit portion 461, and the third slit portion 463 is a substantially trapezoidal shape larger than the second slit portion 462. Moreover, when the ratio of the three relative sizes and shapes is observed, each slit portion 46 is larger than the corresponding irradiation pattern Di in the width direction. In addition, in each slit portion 46, the interval between the second slit portion 462 and the third slit portion 463 is larger than the interval between the first slit portion 461 and the second slit portion 462.

[0056] Thus, when viewed in relative ratio, the three slit portions 46 have different sizes and shapes from each irradiation pattern Di, and are at different intervals. Among the slit portions 46, the first slit portion 461 is the smallest, and the light passing through is magnified at the largest magnification when projected onto the road surface 2 to form the first irradiation pattern Di1. In addition, among the slit portions 46, the third slit portion 463 is the largest, and the light passing through is magnified at the smallest magnification when projected onto the road surface 2 to form the third irradiation pattern Di3.

[0057] like Figures 2 to 5 As shown, the projection lens 25 has a projection lens body 47 for projecting light passing through the lampshade 24; and a pair of projection lens mounting pieces 48 extending from the projection lens body 47 in the width direction. The projection lens body 47 is a circular convex lens when viewed in the axial direction. In Example 1, the incident surface and the exit surface are convex free-form surfaces. In the projection lens body 47, the projection lens optical axis Al is inclined relative to the road surface 2, i.e., the lamp unit axis Ar. This inclination will be described later. The projection lens body 47 forms an irradiation pattern Pi on the road surface 2 by projecting onto the slit portions 46 of the lampshade 24 (see Figure 1 ). In addition, the incident surface and the outgoing surface may be either convex or concave as long as the projection lens body 47 is a convex lens, and are not limited to the structure of the first embodiment.

[0058] The two projection lens mounting pieces 48 are plate-shaped and can be closely attached to the respective lampshade mounting pieces 44 of the lampshade 24 mounted on the ends of the two mounting arms 32 of the setting platform 21. Each projection lens mounting piece 48 is provided with a projection lens positioning hole 48a and a projection lens threaded through hole 48b. Each projection lens positioning hole 48a can be embedded with the positioning protrusion 32a passing therethrough when the projection lens mounting piece 48 is closely attached to the lampshade mounting piece 44. Each projection lens threaded through hole 48b can be inserted with the screw 33 passing through the lampshade threaded through hole 44b when the projection lens mounting piece 48 is closely attached to the lampshade mounting piece 44. The projection lens 25 is mounted on the two mounting arms 32 (ends thereof) of the setting platform 21 by passing the positioning protrusion 32a corresponding to each projection lens positioning hole 48a and screwing each screw 33 passing through each projection lens threaded through hole 48b into the corresponding threaded hole 32b. In the projection lens 25, the projection lens main body 47 is angled relative to the two projection lens mounting pieces 48 so that the projection lens optical axis A1 is inclined at a predetermined angle relative to the lamp unit axis Ar.

[0059] Next, mainly use Figure 5 , Figure 8 , Fig. 9 , the structure of the condenser lens body 41 of the condenser lens 23 is described. The condenser lens body 41 has a first lens portion 51 corresponding to the first light source 34, and a second lens portion 52 corresponding to the second light source 35. In the condenser lens body 41 of Example 1, the first lens portion 51 and the second lens portion 52 are formed as one body in a state where the second lens portion 52 is placed on the first lens portion 51. The condenser lens 23 of Example 1 determines the shapes of the first lens portion 51 and the second lens portion 52, that is, the optical settings, in order to appropriately illuminate the slit portions 46 of the lampshade 24 using the light emitted from the light source portion 22, that is, the light sources (34, 35).

[0060] The first lens portion 51 is opposed to the first light source 34 (located on the emission optical axis of the first light source 34) in the direction in which the setting stage reference axis a1 extends (hereinafter also referred to as the setting stage reference axis a1 direction). The first lens portion 51 collects the light from the first light source 34 in the region of the lampshade 24 where the first slit portion 461 and the second slit portion 462 are provided. In the first lens portion 51, an opposing incident surface 53 is provided on the incident surface on the lens side opposed to the first light source 34, the central portion of which is concave toward the side opposite to the light source portion 22 and is curved convexly toward the light source portion 22 at the center, an inclined incident surface 54 surrounding the inclined incident surface 54, and a reflecting surface 55 surrounding the inclined incident surface 54 in a truncated cone shape.

[0061] The opposed incident surface 53 is disposed on the emission optical axis of the first light source 34 so as to be opposed to the first light source 34 in the direction of the reference axis a1 of the installation stage, and the first light source 34 is located near the rear focus (rear focus). The opposed incident surface 53 allows the light emitted from the first light source 34 to enter the first lens portion 51 as parallel light traveling substantially parallel to the axis of the first lens portion 51, and travel toward the inner emission surface portion 57 described later (see Fig.12 ). In addition, the parallel light (parallel light) refers to light in a state where the light passes through the opposite incident surface 53 and is collimated.

[0062] The inclined incident surface 54 is provided to protrude toward the first light source 34 so that the light from the first light source 34 that does not travel toward the opposite incident surface 53 is incident on the first lens portion 51. The reflecting surface 55 is provided at a position where the light that is incident from the inclined incident surface 54 into the condenser lens 23 travels (see Fig.10 The reflecting surface 55 reflects the light incident from the inclined incident surface 54 and makes it travel toward the outer exit surface portion 58 described later as parallel light traveling substantially parallel to the axis of the first lens portion 51 (see Fig.10 ) In addition, the reflecting surface 55 may reflect light by total reflection, or may reflect light by bonding aluminum, silver, etc. by vapor deposition, painting, etc.

[0063] In the first lens portion 51, a first emission surface 56 is provided opposite to the region of the lampshade 24 provided with the first slit portion 461 and the second slit portion 462, so that the light from the first light source 34 is collected in the region of the lampshade 24 provided with the first slit portion 461 and the second slit portion 462. In the first lens portion 51, the light passing through the opposite incident surface 53 becomes direct light directly directed toward the first emission surface 56, and the light passing through the inclined incident surface 54 and reflected by the reflection surface 55 becomes reflected light directed toward the first emission surface 56 after internal reflection. Since the first lens portion 51 has such a structure, the light emitted from the corresponding first light source 34 can be efficiently utilized.

[0064] like Fig. 9 As shown in FIG. 1 and FIG. 2 , the first emission surface 56 is a circular shape with a portion of the upper portion cut off when viewed from the front, and has an inner emission surface 57 and an outer emission surface 58 with different optical settings. The inner emission surface 57 is provided in the first emission surface 56 in the area where light passing through the opposite incident surface 53 travels (see FIG. 1 ). Fig.12), and is roughly circular when viewed from the front. The inner exit surface portion 57 protrudes further toward the projection lens 25 side (the front side in the front-to-back direction) than the outer exit surface portion 58. The inner exit surface portion 57 forms a plurality of light distribution images of the first light source 34 on the first slit portion 461 and the second slit portion 462 of the lampshade 24 by refracting light from the first light source 34 through the opposing incident surface 53. The light distribution images are formed by appropriately overlapping at positions corresponding to the optical characteristics of the opposing incident surface 53 and the inner exit surface portion 57. The optical characteristics can be set by adjusting the curvature (surface shape) of the inner exit surface portion 57 together with the opposing incident surface 53 at each location, and in Example 1, it is set so that the curvature changes gradually.

[0065] The outer exit surface portion 58 is provided to surround the area separated by the inner exit surface portion 57 in the width direction and the area below the inner exit surface portion 57, and is located in the area where the light from the first light source 34 passes through the inclined incident surface 54 and is reflected by the reflection surface 55 (refer to Fig.10 ). The outer exit surface portion 58 is located on the rear side of the inner exit surface portion 57 in the front-to-back direction. The outer exit surface portion 58 forms a plurality of light distribution images of the first light source 34 on the first slit portion 461 and the second slit portion 462 of the lampshade 24 by refracting light from the first light source 34 through the inclined incident surface 54 and reflected by the reflecting surface 55. Each of the light distribution images is formed by appropriately overlapping at positions corresponding to the optical characteristics of the reflecting surface 55 and the outer exit surface portion 58. The optical characteristics can be set by adjusting the curvature (surface shape) of the outer exit surface portion 58 together with the reflecting surface 55 at each location. In Example 1, their curvatures are set to change gradually.

[0066] The second lens portion 52 is formed as a convex lens having a substantially rectangular shape and being long in the width direction when viewed from the front in the direction of the reference axis a1 of the setting table, and as a whole, the expanded light emitted from the second light source 35 is focused on the area of ​​the lampshade 24 provided with the third slit portion 463 (see Fig.14 ). The second lens portion 52 has a second incident surface 61 opposite to the second light source 35, and a second exit surface 62 facing the opposite side thereof. In Embodiment 1, the second lens portion 52 is formed as a free-form surface in which the second incident surface 61 and the second exit surface 62 are convex. In addition, as long as the second lens portion 52 is set as a convex lens, the second incident surface 61 and the second exit surface 62 can be either convex or concave, and are not limited to the structure of Embodiment 1.

[0067] The second incident surface 61 is opposite to the second light source 35 in the direction of the stage reference axis a1, and the second light source 35 is located near the rear focus (rear focus). The second incident surface 61 allows the light emitted from the second light source 35 to enter the second lens portion 52 as parallel light traveling substantially parallel to the axis of the second lens portion 52 (see Fig.14 ). The second exit surface 62 is arranged on the side opposite to the second incident surface 61, and refracts the light passing through the second incident surface 61 to focus the light and move it toward the front side in the front-to-back direction. The second exit surface 62 forms a plurality of light distribution images of the second light source 35 on the lampshade 24 (lampshade portion 43) by irradiating the light passing through the second incident surface 61 from the second light source 35. The light distribution images are formed by appropriately overlapping at positions corresponding to the optical characteristics of the second incident surface 61 and the second exit surface 62. The optical characteristics can be set by adjusting the curvature (surface shape) of the second exit surface 62 together with the second incident surface 61 at each location. In Example 1, it is set so that the curvature changes gradually.

[0068] Next, in the vehicle lamp 10, the postures of the installation base 21, the light source 22, the condenser lens 23, the lamp cover 24, and the projection lens 25 relative to the lamp unit axis Ar are described. First, in the projection lens 25 (projection lens body 47), as shown in FIG. Figure 5 As shown, the reference focus Fb is set near the lampshade 24 on the lamp unit axis Ar. The reference focus Fb coincides with the lampshade reference point Ps of the lampshade 24 in Example 1. Here, in the projection lens 25 (projection lens body 47), the incident surface and the exit surface are formed as free curved surfaces based on the curved surface serving as a reference. In the projection lens 25, the center line in the state where the incident surface and the exit surface are formed as curved surfaces serving as a reference is set as the projection lens optical axis A1. In the state where the incident surface and the exit surface are set as curved surfaces serving as a reference, when light parallel to the projection lens optical axis A1 of the projection lens 25 (projection lens body 47) enters from the exit surface side, the reference focus Fb becomes the part where the light is concentrated. In addition, since the incident surface and the exit surface of the projection lens 25 are set as free curved surfaces as described above, even if the parallel light as described above enters from the exit surface side, all of its light beams may not pass through the reference focus Fb. The reference focus Fb coincides with the shade reference point Ps on the shade 24 and is therefore located between the shade 24 and the projection lens 25. In addition, the reference focus Fb can be appropriately set as long as it is located between the shade 24 and the projection lens 25. Here, the space between the shade 24 and the projection lens 25 is not limited to the space sandwiched between them, but also includes a position overlapping the shade 24 and the projection lens 25.

[0069] Furthermore, the projection lens 25 is configured in the following state: the projection lens 25 is rotated (tilted) in such a manner that the front side of the axial direction of the projection lens optical axis Al becomes lower than the lamp unit axis Ar, with the line passing through the reference focus Fb and extending in the width direction as the rotation center. The downward angle of the projection lens optical axis Al relative to the lamp unit axis Ar is set as a first tilt angle θ1. The first tilt angle θ1 is 20 degrees in Example 1. In addition, the projection lens 25 can be configured in a state where the front side of the axial direction of the projection lens optical axis Al is rotated toward the lower side than the lamp unit axis Ar, with the reference focus Fb set at the above-mentioned position as the center. The size of the first tilt angle θ1 is not limited to the structure of Example 1. The first tilt angle θ1 is preferably in the range of 15 to 20 degrees. The first tilt angle θ1 is set according to the position where the irradiation pattern Pi is formed on the road surface 2 around the rear of the vehicle 1, and is set to 20 degrees in Example 1 so that the irradiation pattern Pi can be formed in an area within 3m away from the vehicle 1. In other words, the lamp unit 20 of the first embodiment can form the irradiation pattern Pi in the area within 3 m away from the vehicle 1 by setting the projection lens 25 to the first inclination angle θ1.

[0070] In addition, the lampshade 24 is configured in the following state: the lampshade 24 is rotated (tilted) in a manner that the front side of the axial direction of the lampshade reference axis a2 is directed downwardly toward the lower side than the lamp unit axis Ar, with the reference focus Fb of the projection lens 25, i.e., the lampshade reference point Ps set by itself, as the rotation center. In this lampshade 24, the angle of the lampshade reference axis a2 relative to the lamp unit axis Ar is set to be equal to the angle (first tilt angle θ1) of the projection lens 25 (projection lens optical axis A1). Therefore, in the lampshade 24 of Example 1, the lampshade reference axis a2 is at an angle of 20 degrees downwardly relative to the lamp unit axis Ar, and the lampshade reference axis a2 is consistent with the projection lens optical axis A1. In addition, the lampshade 24 can be configured in a state where it is rotated downwardly toward the lower side than the lamp unit axis Ar, with the reference focus Fb set at the above-mentioned position as the center, and the front side of the axial direction of the lampshade reference axis a2 is directed downwardly toward the lower side than the lamp unit axis Ar, at an angle (first tilt angle θ1) equal to the projection lens 25 (projection lens optical axis A1), and is not limited to the structure of Example 1.

[0071] When the two projection lens mounting pieces 48 and the two lampshade mounting pieces 44 are mounted on the two mounting arms 32 (ends thereof) of the mounting platform 21, the projection lens 25 and the lampshade 24 are in a state where the projection lens optical axis A1 is consistent with the lampshade reference axis a2. The projection lens 25 and the lampshade 24 are in a state where the front side of the axial direction of the projection lens optical axis A1 and the lampshade reference axis a2 is rotated downward at a first tilt angle θ1 (20 degrees) relative to the lamp unit axis Ar with the reference focus Fb as the starting point. Therefore, the projection lens 25 and the lampshade 24 are maintained in a state of facing each other in the direction in which the projection lens optical axis A1 (lampshade reference axis a2) extends and are tilted downward relative to the lamp unit axis Ar. Since the reference focus Fb of the projection lens 25 is consistent with the lampshade reference point Ps of the lampshade 24 on the lamp unit axis Ar, the image of each slit portion 46 of the lampshade portion 43 can be formed on the projection lens optical axis A1 with the least aberration according to its own optical setting. Therefore, the projection lens 25 can project the light having a beam distribution described later and having passed through the slit portions 46 of the lamp housing 24 onto the road surface 2 around a position intersecting with the projection lens optical axis A1.

[0072] Here, the projection lens 25 is arranged at a position rotated downward from the lamp unit axis Ar as described above, so that when viewed in the direction of the projection lens optical axis Al, it is circular and protrudes downward from the other components of the lamp unit 20 (the installation base 21, the light source 22, the focusing lens 23, and the lamp cover 24) in the vertical direction. In order to prevent this protrusion, the lower end of the projection lens 25 in the vertical direction is cut off to form a lower end surface 25a. The lower end surface 25a is formed by partially cutting off the portion of the projection lens 25 that protrudes downward from the other components, and in the first embodiment, it is formed as a plane located in the vertical direction above the lower end of the installation base 21. Thus, even if the projection lens 25 is inclined at the first angle θ1 with respect to the lamp unit axis Ar, it can be prevented from protruding downward from the other components of the lamp unit 20, and the size of the lamp unit 20 in the vertical direction can be prevented from increasing.

[0073] Next, in the base portion 31, as described above, a setting table reference point Ph is set near the substrate 36 of the light source unit 22, and a setting table reference axis a1 is set that passes through the setting table reference point Ph and is orthogonal to the substrate 36 (light source mounting portion). And the base portion 31 is configured in a state where it rotates (tilts) in a manner such that the front side of the axis direction of the setting table reference axis a1 becomes lower than the lamp unit axis Ar, with the line passing through the setting table reference point Ph and extending in the width direction as the rotation center. The downward angle of the setting table reference axis a1 relative to the lamp unit axis Ar is set as a second tilt angle θ2. The second tilt angle θ2 is 10 degrees in Example 1. In addition, the base portion 31 can be configured in a state where it rotates toward the lower side of the lamp unit axis Ar, with the setting table reference point Ph set above the lamp unit axis Ar in the up-down direction and near the light source unit 22 (its substrate 36) as the center. That is, the second inclination angle θ2 can be set appropriately as long as the base portion 31 is rotated as described above, and is not limited to the structure of Example 1. The second inclination angle θ2 is less than the first inclination angle θ1, and is preferably approximately half of the first inclination angle θ1. When the base portion 31 is mounted on the vehicle lamp 10 using the mounting rib 31d, the base portion reference axis a1 is tilted downward by 10 degrees relative to the lamp unit axis Ar as described above.

[0074] In addition, the condenser lens 23 is arranged in a state where it rotates (tilts) toward the lower side than the lamp unit axis Ar at an angle (second inclination angle θ2) equal to the base 31 (the setting table reference axis a1) with a line extending in the width direction passing through the setting table reference point Ph of the base 31 as the rotation center. Therefore, the condenser lens 23 of Example 1 is tilted in unison with the base 31 while maintaining a state in which the first lens portion 51 and the first light source 34 are opposed to each other in the setting table reference axis a1 direction and the second lens portion 52 and the second light source 35 are opposed to each other in the setting table reference axis a1 direction. In addition, the condenser lens 23 can rotate toward the lower side than the lamp unit axis Ar with the base 31 with the setting table reference point Ph as the center in a state in which the positional relationship relative to the base 31 (each light source (34, 35)) is set, and is not limited to the structure of Example 1. When the two condenser lens attachment pieces 42 are attached to the two attachment arms 32 (ends thereof) of the installation base 21 , the condenser lens 23 is rotated toward the lower side than the lamp unit axis Ar together with the base 31 as described above.

[0075] Next, use Figures 10 to 15 The optical setting of the condenser lens 23 is described. In the condenser lens 23, in the first lens portion 51, the light from the outer emission surface portion 58 forms a first irradiation area A1 (see Fig.11), the light from the inner exit surface 57 forms a second irradiation area A2 (refer to Fig.13 ). In addition, in the condenser lens 23, the second lens portion 52 forms a third irradiation area A3 (see Fig.15 ). This is explained below.

[0076] First, in the first lens portion 51, as Fig.10 As shown, the outer exit surface portion 58 is set at least in the cross section (horizontal section) so that the light reflected by the reflection surface 55 from the first light source 34 through the inclined incident surface 54 is focused at a first position P1 slightly beyond the lampshade 24. The first position P1 is set from the viewpoint that the light does not travel along the peripheral portion of the projection lens 25 (its projection lens body 47). In addition, the first position P1 is set near the lampshade 24 so that the light from the outer exit surface portion 58, which is larger than the first slit portion 461 and the second slit portion 462, can be focused on the first slit portion 461 and the second slit portion 462. The first lens portion 51 is formed by irradiating the light reflected by the reflection surface 55 from the first light source 34 through the inclined incident surface 54 onto the lampshade 24 from the outer exit surface portion 58. Fig.11 The first irradiation area A1 is shown. The first irradiation area A1 irradiates the entire first slit portion 461 and the second slit portion 462 and improves the light beam focusing degree, especially improves the light beam focusing degree on the substantially upper half of the first slit portion 461 and the substantially lower half of the second slit portion 462.

[0077] In addition, in the first lens portion 51, as Fig.12 As shown, the inner exit surface portion 57 is set at least in the cross section (horizontal section) so that the light from the first light source 34 through the opposite incident surface 53 is focused at a second position P2 beyond the lampshade 24. The second position P2 is set from the viewpoint that the light does not travel along the peripheral portion of the projection lens 25 (its projection lens body 47). In addition, the second position P2 is a position farther away from the lampshade 24 than the first position P1, that is, a position displaced toward the projection lens 25 side than the first position P1. The second position P2 is set between the lampshade 24 and the projection lens 25 so that the light from the inner exit surface portion 57 can be focused on the first slit portion 461 and the second slit portion 462. The first lens portion 51 is formed by irradiating the light from the first light source 34 through the opposite incident surface 53 from the inner exit surface portion 57 to the lampshade 24. Fig.13 The second irradiation area A2 is shown. The second irradiation area A2 irradiates the entire first slit portion 461 to maximize the light beam convergence, and also irradiates the entire second slit portion 462.

[0078] Therefore, the first lens portion 51 forms the first irradiation area A1 and the second irradiation area A2 on the lampshade 24 by overlapping with the light from the first light source 34. Thus, the first lens portion 51 can maximize the light beam convergence of the first slit portion 461 and second slit portion 462, and can irradiate the entire area of ​​the first slit portion 461 and the second slit portion 462. In addition, if the first lens portion 51 forms an irradiation area that brightens the first slit portion 461 and the second slit portion 462 from the viewpoint of appropriately forming the corresponding first irradiation pattern Di1 and second irradiation pattern Di2, the distribution and shape of the brightness in the irradiation area formed by the inner exit surface portion 57 and the outer exit surface portion 58 can be appropriately set, and is not limited to Example 1.

[0079] Furthermore, in the second lens portion 52, as Fig.14 As shown, the second emission surface 62 is set at least in the cross section (horizontal section) to focus the light from the second light source 35 through the second incident surface 61 at a third position P3 that is larger than the lampshade 24. The third position P3 is set from the viewpoint that the light does not travel along the peripheral portion of the projection lens 25 (its projection lens body 47). In addition, the third position P3 is set to a position farther away from the lampshade 24 than the second position P2, that is, a position displaced toward the projection lens 25 than the second position P2, from the viewpoint that the third slit portion 463 corresponds to the third irradiation pattern Di3 and the third irradiation pattern Di3 is formed at the closest position among the irradiation patterns Di, so as to prevent the light from the second emission surface 62 from being excessively focused on the third slit portion 463. In addition, the second lens portion 52 forms a projection lens 24 by irradiating the light from the second light source 35 through the second incident surface 61 from the second emission surface 62 to the lampshade 24. Fig.15 The third irradiation area A3 is shown. The third irradiation area A3 increases the light convergence of the lower half of the third slit portion 463 and irradiates the entire third slit portion 463. The third irradiation area A3 as a whole is set to have a light convergence lower than that of the first slit portion 461 and the second slit portion 462 based on the first lens portion 51.

[0080] The condenser lens 23 irradiates the entire area of ​​the first slit portion 461 and the second slit portion 462 with the light from the first light source 34 through the first lens portion 51, and irradiates the entire area of ​​the third slit portion 463 with the light from the second light source 35 through the second lens portion 52. Furthermore, the condenser lens 23 increases the condensing power of the light beam of the first slit portion 461 the most, increases the condensing power of the light beam of the second slit portion 462 the second, and increases the condensing power of the light beam of the third slit portion 463 the third. Thus, the condenser lens 23 can properly irradiate the first slit portion 461, the second slit portion 462, and the third slit portion 463 on the lampshade 24.

[0081] Next, the function of the vehicle lamp 10 is described. The vehicle lamp 10 lights and extinguishes the light sources (34, 35) by supplying power from the lighting control circuit from the substrate 36 in the lamp unit 20. The light from each light source (34, 35) is focused by the focusing lens 23 and irradiates the lampshade 24, and after passing through each slit portion 46 thereof, it is projected by the projection lens 25, thereby forming an irradiation pattern Pi on the road surface 2. The irradiation pattern Pi is formed by simultaneously forming three irradiation patterns Di at positions arranged on a straight line by projecting the above-mentioned irradiation (light beam) distribution through each slit portion 46 of the lampshade 24 by the projection lens 25, that is, by using the light from each light source (34, 35) to brighten each slit portion 46.

[0082] The vehicle lamp 10 links the lamp unit 20 with the reverse lamp. When the reverse lamp is turned on, the light sources (34, 35) on the left and right sides are turned on to form an illumination pattern Pi on the road surface 2. Therefore, when the vehicle 1 is about to back up, the vehicle lamp 10 can make other vehicles, pedestrians and other traffic participants recognize the illumination pattern Pi formed on the road surface 2. In addition, when the driver of the vehicle 1 backs up, the illumination pattern Pi can be recognized as the actual backing direction of the vehicle 1, thereby supporting driving.

[0083] Here, the existing vehicle lamps described in the prior art documents form an illumination pattern on the road surface by tilting downward a lamp unit composed of a light source, a light shielding component, and a projection lens. In such a vehicle lamp, since it is required to form an illumination pattern near the vehicle (the vehicle on which it is mounted), it is considered to increase the inclination of the lamp unit according to this requirement. However, in the vehicle lamp, when it is mounted on a vehicle, the lamp unit is generally set along a vehicle axis set on the vehicle, and it is required to suppress the size in the up-down direction orthogonal to the vehicle axis. In addition, in the vehicle lamp, for example, it is considered to set other lamps in the same lamp chamber as the lamp unit, but there is a size restriction in the lamp chamber, and there is a concern that the lamp unit with a large inclination will interfere with other lamps. Therefore, the existing vehicle lamps are limited in suppressing the size in the up-down direction and making the position of the illumination pattern formed by the lamp unit close to the vehicle.

[0084] On the other hand, the vehicle lamp 10 adopts the following posture: in the lamp unit 20, the reference focus Fb of the projection lens 25 is located on the lamp unit axis Ar and near the shade reference point Ps of the shade 24, and the projection lens 25 and the shade 24 are rotated around the reference focus Fb so that the projection lens optical axis A1 and the shade reference axis a2 are tilted downward relative to the lamp unit axis Ar. Therefore, in the lamp unit 20, the projection lens 25 can project the light emitted from each light source (34, 35) in the shade 24 (its shade portion 43) and transmitted through each slit portion 46 onto the projection lens optical axis A1. At this time, the lamp unit 20 adopts the posture in which the reference focus Fb is located near the shade reference point Ps of the shade 24 and the shade 24 is orthogonal to the projection lens optical axis A1, so that each slit portion 46 provided near the shade reference point Ps can be located near the focal plane of the projection lens 25. Therefore, the lamp unit 20 can project the brightening of each slit portion 46 onto the projection lens optical axis A1 when the projection lens 25 is optically set to minimize aberration. Thus, the lamp unit 20 can appropriately form the illumination pattern Pi near the vehicle 1 on the road surface 2 from a position higher than the road surface 2 even if the lamp unit axis Ar is set parallel to the road surface 2.

[0085] In addition, the lamp unit 20 adopts the following posture: a setting table reference point Ph is set above the lamp unit axis Ar and near the base plate 36, and the base 31 and the focusing lens 23 are rotated around the setting table reference point Ph to be tilted downward relative to the lamp unit axis Ar. Therefore, after the light from each light source (34, 35) is focused by the focusing lens 23 on each slit portion 46 of the lamp cover 24, the lamp unit 20 can appropriately advance the light passing through each slit portion 46 to the projection lens 25. Figures 16 to 19 This is explained. Figures 16 to 19 In the projection lens 251 of Comparative Example 1 and the projection lens 25 of Example 1, the central region which strongly reflects the optical design is defined as the effective region Ea, and the region surrounding it is defined as the outer edge region Oa.

[0086] Should Fig.16 , Fig.17 The figure shows the distribution of light from each light source on the projection lens 251 in the lamp unit 201 of Comparative Example 1. The lamp unit 201 of Comparative Example 1 has the same basic structure as the lamp unit 20, but unlike the lamp unit 20, the base portion and the focusing lens do not rotate around the reference point of the setting table. That is, the lamp unit of Comparative Example 1 adopts a structure in which the projection lens 251 and the lampshade rotate only downward around the reference focus. That is, in order to form an illumination pattern at a position close to the vehicle, the lamp unit 201 of Comparative Example 1 sets the projection lens 251 and the lampshade to the first inclination angle θ1, but the base portion and the focusing lens are not inclined downward. Fig.16As shown, the lamp unit 201 of the comparative example 1 forms a distribution area A11 on the projection lens 251 using the light from the first light source (34) focused by the first lens portion (51). The distribution area A11 is biased to the upper side of the effective area Ea, and a part of the upper side is projected to the outer edge area Oa. Fig.17 As shown, the lamp unit 201 of Comparative Example 1 forms a distribution area A12 on the projection lens 251 using the light from the second light source (35) focused by the second lens portion (52). The distribution area A12 is biased to the upper side of the effective area Ea, and a part of the upper side is located in the outer edge area Oa.

[0087] In contrast, Fig.18 As shown, the lamp unit 20 of the first embodiment forms a distribution area A13 on the projection lens 25 using the light from the first light source 34 focused by the first lens portion 51. The entire distribution area A13 enters the effective area Ea. Fig.19 As shown, the lamp unit 20 of the first embodiment forms a distribution area A14 on the projection lens 25 using the light from the second light source 35 focused by the second lens portion 52. The distribution area A14 is located near the center of the effective area Ea. Therefore, the lamp unit 20 of the first embodiment adopts a posture in which the setting table 21 and the focusing lens 23 are rotated with the setting table reference point Ph as the center so as to be tilted downward relative to the lamp unit axis Ar, so that the light from each light source (34, 35) can travel to the effective area Ea of the projection lens 25.

[0088] Thus, even when the projection lens 25 and the lamp housing 24 are tilted downward at the first tilt angle θ1, the lamp unit 20 of the first embodiment can make the light from each light source (34, 35) travel toward the effective area Ea of the projection lens 25 by tilting the installation platform 21 and the condenser lens 23 downward (see Fig.18 , Fig.19 , and Figure 5 In other words, the lamp unit 20 can appropriately form the irradiation pattern Pi at a position close to the vehicle 1 on the road surface 2 by tilting the projection lens 25 and the lampshade 24 downward, and can appropriately introduce the light from each light source (34, 35) to the projection lens 25 by tilting the installation base 21 and the condenser lens 23 downward. Thus, in the lamp unit 20, the projection lens 25 can efficiently condense the light from each light source (34, 35) according to the optical setting, and can appropriately project the situation where each slit portion 46 becomes bright onto the projection lens optical axis A1, and can appropriately form the irradiation pattern Pi at a position close to the vehicle 1 on the road surface 2.

[0089] In the lamp unit 20 of the first embodiment, the reference focus Fb, which is the rotation center of the projection lens 25 and the lampshade 24, is set on the lampshade 24, and the installation stage reference point Ph, which is the rotation center of the installation stage 21 and the condenser lens 23, is set on the substrate 36. In addition, the lamp unit 20 makes the lamp unit axis Ar along the horizontal direction, and makes the projection lens 25 and the lampshade 24 rotate and tilt downward by 20 degrees around the reference focus Fb as the center, and makes the installation stage 21 and the condenser lens 23 rotate and tilt downward by 10 degrees around the installation stage reference point Ph as the center. In this way, the lamp unit 20 uses the projection lens 25, the lampshade 24, the installation stage 21, and the condenser lens 23 at different positions as the rotation center, and sets the respective rotation centers between the components that rotate integrally. Therefore, compared with the case where the lamp unit 20 is tilted at a single position as the rotation center, the amount of movement of the projection lens 25, the lampshade 24, the installation stage 21, and the condenser lens 23 in the vertical direction can be suppressed. Thus, the lamp unit 20 can suppress the increase in height, and can tilt the projection lens 25 and the lampshade 24 downward by 20 degrees, and can tilt the installation platform 21 and the focusing lens 23 downward by 10 degrees. Therefore, the lamp unit 20 can appropriately form the irradiation pattern Pi at a position close to the vehicle 1 on the road surface 2 as described above, and can suppress the increase in the size in the vertical direction.

[0090] Furthermore, the lamp unit 20 of the first embodiment makes the installation base reference point Ph, which is the rotation center of the base 31 and the condenser lens 23, located above the reference focus Fb, which is the rotation center of the projection lens 25 and the lampshade 24. In addition, the lamp unit 20 makes the light sources (34, 35) of the light source unit 22 installed in the installation base 21 and the condenser lens 23 located above the lamp unit axis Ar. Therefore, compared with the case where the installation base reference point Ph is set below the lamp unit axis Ar, the lamp unit 20 can use the position close to the light sources (34, 35) and the condenser lens 23 as the rotation center, and can suppress the movement amount of the light sources (34, 35) and the condenser lens 23 accompanying the rotation of the second inclination angle θ2. Therefore, by rotating around the installation base reference point Ph as the center, the lamp unit 20 can prevent the interval from the condenser lens 23 to the lampshade 24 rotating in the same manner from becoming smaller. Therefore, in the viewpoint of forming each irradiation area A on the lampshade 24 as described above by condensing the light from each light source (34, 35) using the condensing lens 23, the lamp unit 20 can appropriately space the condensing lens 23 and the lampshade 24. Thus, the lamp unit 20 can more appropriately form the irradiation pattern Pi at a position close to the vehicle 1 on the road surface 2.

[0091] The vehicle lamp 10 has two light sources (34, 35) disposed above the lamp unit axis Ar in the lamp unit 20, and each slit portion 46 disposed above the lamp unit axis Ar. Therefore, the lamp unit 20 can make the traveling direction of the light from each light source (34, 35) passing through each slit portion 46 toward the projection lens 25 downward relative to the lamp unit axis Ar, and can make the traveling direction of the light projected by the projection lens 25 downward relative to the lamp unit axis Ar. Therefore, the lamp unit 20 can assist in forming the position of the irradiation pattern Pi near the vehicle 1 by using the positional relationship of the light source portion 22 and the lamp cover 24 relative to the projection lens 25. Thus, even if the lamp unit 20 as a whole, i.e., the lamp unit axis Ar, is not tilted, the irradiation pattern Pi can be more appropriately formed in an area within 3 m away from the vehicle 1. In addition, the lamp unit 20 can assist in forming the irradiation pattern Pi near the vehicle 1 by using the positional relationship of the light source portion 22 and the lamp cover 24 relative to the projection lens 25, so that the optical setting in the condenser lens 23 can be simplified.

[0092] In the lamp unit 20, the center position C1 of the first slit portion 461 and the second slit portion 462 is located below the center position C2 of the first light source 34, and the center position C3 of the third slit portion 463 is located below the center position C4 of the second light source 35. Therefore, the lamp unit 20 can make the traveling direction of the light from each light source (34, 35) toward the corresponding slit portion 46 downward relative to the lamp unit axis Ar, and can further enhance the downward effect generated by the positional relationship of the light source portion 22 and the lamp cover 24 relative to the projection lens 25. Therefore, the lamp unit 20 can make the optical setting in the condenser lens 23 reasonable, and can suppress the downward inclination of the lamp unit axis Ar in the lamp chamber, and can more appropriately form the irradiation pattern Pi in the area within 3m away from the vehicle 1.

[0093] The lamp unit 20 sets the focusing position (first position P1) of the light reflected by the reflection surface 55 and emitted from the outer exit surface 58, the focusing position (second position P2) of the light passing through the opposite incident surface 53 and emitted from the inner exit surface 57, and the focusing position (third position P3) of the light passing through the second incident surface 61 and emitted from the second exit surface 62 in sequence from the lampshade 24 side. Therefore, the lamp unit 20 can adjust the focusing degree and distribution of the light beam at each slit portion 46 on the lampshade 24 by adjusting the above-mentioned focusing positions, so that the irradiation pattern Pi can be appropriately formed with a simple structure. In particular, the lamp unit 20 of Example 1 sets the above-mentioned focusing positions from the viewpoint that the light does not travel along the peripheral portion of the projection lens 25 (its projection lens body 47), so the projection lens 25 can project the light in a state with less aberration according to the optical setting, and the irradiation pattern Pi can be appropriately formed. This is because the lamp unit 20 sets each light source (34, 35) to white, and thus can suppress the occurrence of color fringing (a portion where a plurality of colors are arranged in a band shape) on the irradiation pattern Pi.

[0094] The lamp unit 20 and the vehicle lamp 10 of the first embodiment can obtain the following effects.

[0095] The lamp unit 20 includes: a plurality of light sources (34, 35); a condenser lens 23 for condensing light from the plurality of light sources (34, 35); a lamp cover 24 provided with a plurality of slits 46 for partially passing the condensed light; and a projection lens 25 for forming an irradiation pattern Pi having a plurality of irradiation patterns Di corresponding to the plurality of slits 46 by projecting the light passing through the plurality of slits 46. In the lamp unit 20, a reference focus Fb is set in the projection lens 25 and on the lamp unit axis Ar, the projection lens 25 and the light shielding member (lamp cover 24) rotate downward around the reference focus Fb, and the installation stage 21 and the condenser lens 23 rotate downward around the installation stage reference point Ph set at the rear and above the reference focus Fb. Therefore, the lamp unit 20 can appropriately form the irradiation pattern Pi at a position close to the vehicle 1 on the road surface 2 while suppressing an increase in the height dimension in the vertical direction.

[0096] In the lamp unit 20, the first inclination angle θ1 of the projection lens 25 and the light shielding member (lamp cover 24) relative to the lamp unit axis Ar is set to be larger than the second inclination angle θ2 of the installation base 21 and the focusing lens 23 relative to the lamp unit axis Ar. Therefore, the lamp unit 20 sets the first inclination angle θ1 of the projection lens 25 and the light shielding member (lamp cover 24) in such a manner that the irradiation pattern Pi can be appropriately formed at a position close to the vehicle 1 on the road surface 2, and the light from each light source (34, 35) can be directed to an appropriate position in the projection lens 25.

[0097] In the lamp unit 20, the reference focus Fb is set between the projection lens 25 and the light shielding member (lamp cover 24), and the installation stage reference point Ph is set between the installation stage 21 and the condenser lens 23. Therefore, the lamp unit 20 can more effectively suppress the amount of movement of the projection lens 25, the lamp cover 24, the installation stage 21, and the condenser lens 23 in the vertical direction, and can more effectively suppress the increase in the height dimension in the vertical direction.

[0098] In the lamp unit 20, the second inclination angle θ2 is set to an angle for guiding the light focused by the focusing lens 23 and passing through the light shielding member (lamp cover 24) to the effective area Ea in the projection lens 25. Therefore, the lamp unit 20 can appropriately guide the light from each light source (34, 35) relative to the projection lens 25 tilted downward, and can more appropriately form the irradiation pattern Pi at a position close to the vehicle 1 on the road surface 2.

[0099] In the lamp unit 20, a plurality of light sources (34, 35) are arranged above the lamp unit axis Ar, and a plurality of slit portions 46 are arranged above the lamp unit axis Ar. Therefore, the lamp unit 20 can make the traveling direction of the light from each light source (34, 35) passing through each slit portion 46 and heading toward the projection lens 25 downward relative to the lamp unit axis Ar, and can make the traveling direction of the light projected by the projection lens 25 downward relative to the lamp unit axis Ar. Thus, the lamp unit 20 can form the irradiation pattern Pi near the vehicle 1 even if the lamp unit axis Ar is not tilted downward, and can simplify the optical setting in the condenser lens 23.

[0100] In the lamp unit 20, light sources (34, 35) are provided corresponding to at least one slit portion 46, and the light sources (34, 35) are provided above the center position (C1, C3) of the corresponding at least one slit portion 46. Therefore, the lamp unit 20 can make the traveling direction of light from each light source (34, 35) toward each corresponding slit portion 46 downward relative to the lamp unit axis Ar, and can further enhance the downward effect caused by the positional relationship of the light source unit 22 and the lamp cover 24 relative to the projection lens 25.

[0101] In the lamp unit 20, the irradiation pattern Di includes a first irradiation pattern Di1, a second irradiation pattern Di2, and a third irradiation pattern Di3, and as a plurality of slit portions 46, there are a first slit portion 461 corresponding to the first irradiation pattern Di1, a second slit portion 462 corresponding to the second irradiation pattern Di2, and a third slit portion 463 corresponding to the third irradiation pattern Di3. In addition, the lamp unit 20 includes a first light source 34 corresponding to the first slit portion 461 and the second slit portion 462, and a second light source 35 corresponding to the third slit portion 463 as light sources. Therefore, the lamp unit 20 can clearly identify the correspondence between the two light sources (34, 35) and each slit portion 46, and can facilitate the optical setting of the condenser lens 23.

[0102] In the lamp unit 20, the center position C2 of the first light source 34 is located above the center position C1 of the region where the first slit portion 461 and the second slit portion 462 are provided, and the center position C4 of the second light source 35 is located above the center position C3 of the third slit portion 463. Therefore, the lamp unit 20 can make the traveling direction of the light from the two light sources (34, 35) toward the corresponding slit portions 46 downward relative to the lamp unit axis Ar, and can make the traveling direction of the light projected from the projection lens 25 more effectively downward relative to the lamp unit axis Ar.

[0103] In the lamp unit 20, the condenser lens 23 is formed by overlapping a first lens portion 51 corresponding to the first light source 34 and a second lens portion 52 corresponding to the second light source 35. In addition, in the lamp unit 20, the first lens portion 51 has an opposing incident surface 53 opposing the first light source 34, an inclined incident surface 54 surrounding the opposing incident surface 53, and a reflecting surface 55 surrounding the inclined incident surface 54, and the second lens portion 52 is formed as a convex lens for condensing light from the corresponding second light source 35. Therefore, the lamp unit 20 can efficiently utilize the light from the first light source 34, can simplify the structure of the first lens portion 51, and can form a predetermined light beam distribution in the first slit portion 461 and the second slit portion 462. In addition, the lamp unit 20 uses the light from the second light source 35 and can use the second lens portion 52 to form a uniform light beam distribution relative to the third slit portion 463. This is because the lamp unit 20 can form various light beam distributions with respect to each slit portion 46 even if using a single condenser lens 23, and can form a more appropriate irradiation pattern Pi.

[0104] In the lamp unit 20, in the first lens portion 51, the focusing position (second position P2) of the light passing through the opposing incident surface 53 is set to the projection lens 25 side of the lampshade 24, and the focusing position (first position P1) of the light reflected by the reflection surface 55 is set to the projection lens 25 side of the lampshade 24. In addition, in the lamp unit 20, in the second lens portion 52, the focusing position (third position P3) of the light from the second light source 35 is set to the projection lens 25 side of the lampshade 24. Therefore, the lamp unit 20 can form a predetermined beam distribution over the entire area of ​​the corresponding slit portion 46 on the lampshade 24 without excessively focusing light, and can appropriately form the irradiation pattern Pi.

[0105] In the lamp unit 20, in the first lens portion 51, the focusing position (second position P2) of the light passing through the opposite incident surface 53 is set to the lampshade 24 side than the focusing position (third position P3) of the light from the second light source 35 in the second lens portion 52, and the focusing position (first position P1) of the light reflected by the reflection surface 55 is set to the lampshade 24 side than the focusing position (second position P2) of the light passing through the opposite incident surface 53. Therefore, the lamp unit 20 can adjust the focusing degree and distribution of the light beam at each slit portion 46 on the lampshade 24 by adjusting the above-mentioned focusing positions, and can set so that the light does not travel on the peripheral portion of the projection lens 25, and can appropriately form the irradiation pattern Pi with a simple structure.

[0106] The vehicle lamp 10 includes the lamp unit 20. Therefore, even if the lamp unit axis Ar is arranged parallel to the vehicle axis, the illumination pattern Pi can be formed near the vehicle 1, and the lamp unit 20 can be arranged while preventing the lamp room from being enlarged.

[0107] Therefore, the lamp unit 20 (vehicle lamp 10 ) as the first embodiment of the lamp unit (vehicle lamp) of the present disclosure can form the illumination pattern Pi near the host vehicle (vehicle 1 ) while suppressing the vertical dimension.

[0108] As mentioned above, the vehicle lamp of the present disclosure has been described based on the first embodiment, but the specific structure is not limited to the first embodiment, and design changes and additions are permitted as long as they do not depart from the gist of the invention of the claims.

[0109] Furthermore, in the first embodiment, the three irradiation patterns Di are set to be roughly rectangular with the vehicle 1 side as the short side, and are arranged at roughly equal intervals in the direction away from the vehicle 1 to form the irradiation pattern Pi. However, as long as the irradiation pattern is composed of a plurality of irradiation patterns Di formed by the lampshade (light shielding member), the pattern of the mark of the irradiation pattern Di, the position of formation, the number of irradiation patterns Di, etc. can be appropriately set, and are not limited to the structure of the first embodiment.

[0110] In addition, in Example 1, each light source (34, 35) is made to emit white light. However, the color of the light emitted from the light source can be appropriately set according to the location where it is installed and the content of transmission, and is not limited to the structure of Example 1.

[0111] In the first embodiment, as the light shielding member, the lampshade 24 that allows the light focused by the focusing lens 23 to pass through each slit portion 46 is used. However, the light shielding member may have other structures as long as it is provided with a plurality of slit portions 46 that allow the light focused by the focusing lens 23 to partially pass through, and is not limited to the structure of the first embodiment. As another structure, for example, a plurality of slit portions that allow the light to partially pass through may be provided on a plate-shaped film member that blocks the transmission of light, as a light shielding plate (filter) that allows the light passing through the focusing lens 23 to pass through the plurality of slit portions.

[0112] In the first embodiment, the lamp unit 20 (vehicle lamp 10) is installed on the vehicle 1 driven by the driver. However, the vehicle lamp may be installed on a vehicle having an automatic driving function, and is not limited to the structure of the first embodiment. In this case, the vehicle lamp only needs to form an illumination pattern at a timing corresponding to the purpose of installation, that is, at a timing corresponding to any intention related to the action of the vehicle 1, and is not limited to the structure of the first embodiment.

[0113] In the first embodiment, the lamp unit 20 is provided in the lamp chamber of the vehicle lamp 10. However, as long as the lamp unit has the above-mentioned features and is mounted on the vehicle, it may be provided at any position of the vehicle, and is not limited to the structure of the first embodiment. In addition, the vehicle lamp 10 may be composed of only the lamp unit 20, and is not limited to the structure of the first embodiment.

[0114] In the first embodiment, two light sources 34 and 35 are provided. However, as long as a plurality of light sources are provided, the number and arrangement may be appropriately set, and the configuration is not limited to the first embodiment.

[0115] In the first embodiment, the lamp unit axis Ar of the lamp unit 20 is parallel to the vehicle axis of the vehicle 1. However, the lamp unit axis Ar may not be completely parallel to the vehicle axis as long as it is approximately parallel to the vehicle axis. Here, the term "approximately parallel" means that the angle formed by each other is set to 3 degrees as the upper limit, preferably within 1 degree. Therefore, the lamp unit axis Ar may also be inclined with respect to the road surface 2 similarly with approximately parallel, i.e., 3 degrees as the upper limit.

[0116] Explanation of symbols

[0117] 10—vehicle lamp, 20—lamp unit, 21—setting platform, 23—focusing lens, 24—lamp cover (as an example of a light-shielding component), 25—projection lens, 34—first light source, 35—second light source, 461—first slit portion, 462—second slit portion, 463—third slit portion, 51—first lens portion, 52—second lens portion, 53—opposite incident surface, 54—inclined incident surface, 55—reflecting surface, Ar—lamp unit axis, C1—center position, C2—center position, C3—center position, C4—center position, Di1—first irradiation pattern, Di2—second irradiation pattern, Di3—third irradiation pattern, Ea—effective area, Fb—reference focus, Ph—setting platform reference point, Pi—irradiation pattern, θ1—first inclination angle, θ2—second inclination angle.

Claims

1. A lamp unit, characterized in that: have: A table portion is provided, which is arranged along the axis of the lamp unit and is provided with a plurality of light sources; A condenser lens for condensing light from the plurality of light sources; a light shielding member having a plurality of slits for partially passing the light collected by the collecting lens; and a projection lens that projects the light that has passed through the light shielding member to form an irradiation pattern having a plurality of irradiation patterns corresponding to the plurality of slit portions, The projection lens sets a reference focus on the lamp unit axis. The projection lens and the light shielding member are rotated downward with the reference focal point as the center. The installation stage and the condenser lens are rotated downward around an installation stage reference point which is set behind and above the reference focal point.

2. The lamp unit according to claim 1, characterized in that A first inclination angle of the projection lens and the light shielding member with respect to the lamp unit axis is larger than a second inclination angle of the installation base and the condenser lens with respect to the lamp unit axis.

3. The lamp unit according to claim 2, characterized in that The reference focus is arranged between the projection lens and the light shielding member. The above-mentioned installation stage reference point is set between the above-mentioned installation stage and the above-mentioned focusing lens.

4. The lamp unit according to claim 3, characterized in that The second inclination angle is set to be an angle that guides the light that is condensed by the condenser lens and passes through the light shielding member to the effective area in the projection lens.

5. The lamp unit according to claim 1, characterized in that The plurality of light sources are arranged above the axis of the lamp unit. The plurality of slit portions are provided above the lamp unit axis.

6. The lamp unit according to claim 5, characterized in that The light source is arranged corresponding to at least one of the slit portions. The light source is disposed above a center position of the corresponding at least one of the slit portions.

7. The lamp unit according to claim 6, characterized in that The irradiation pattern comprises: a first irradiation pattern projected to a separate position in the irradiation pattern; a second irradiation pattern projected to a position closer to the first irradiation pattern in the irradiation pattern; and a third irradiation pattern projected to a position closer to the second irradiation pattern in the irradiation pattern, The plurality of slit portions include: a first slit portion corresponding to the first irradiation pattern; a second slit portion corresponding to the second irradiation pattern; and a third slit portion corresponding to the third irradiation pattern. The light source includes a first light source corresponding to the first slit portion and the second slit portion, and a second light source corresponding to the third slit portion.

8. The lamp unit according to claim 7, characterized in that The center position of the first light source is located above the center position of the region where the first slit portion and the second slit portion are provided. The center position of the second light source is located above the center position of the third slit portion.

9. The lamp unit according to claim 8, characterized in that In the condenser lens, a first lens portion corresponding to the first light source and a second lens portion corresponding to the second light source overlap. The first lens portion includes an opposing incident surface opposing the first light source, an inclined incident surface surrounding the opposing incident surface, and a reflecting surface surrounding the inclined incident surface. The second lens portion is a convex lens that focuses light from the corresponding second light source.

10. The lamp unit according to claim 9, characterized in that In the first lens portion, a focusing position of light passing through the opposed incident surface is set to be closer to the projection lens than the shading member, and a focusing position of light reflected by the reflecting surface is set to be closer to the projection lens than the shading member. In the second lens portion, a condensing position of the light from the second light source is set to be closer to the projection lens than the light shielding member.

11. The lamp unit according to claim 10, characterized in that In the above-mentioned first lens portion, the focusing position of the light passing through the above-mentioned opposite incident surface is set to be closer to the above-mentioned shading component side than the focusing position of the light from the above-mentioned second light source in the above-mentioned second lens portion, and the focusing position of the light reflected by the above-mentioned reflecting surface is set to be closer to the above-mentioned shading component side than the focusing position of the light passing through the above-mentioned opposite incident surface.

12. A vehicle lamp, characterized in that: A lamp unit according to claim 1 is provided.

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