JP2016119273A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of light guide bodies and light source arrangements used for forming a branched linear light emission, and to acquire uniform light emission.SOLUTION: A vehicular lighting fixture 1 includes: an incident light guide part 14 in which an incident part 14a is provided; a first light guide part 16; a second light guide part 18; and a connection part 20 for connecting the first light guide part 16 and the second light guide part 18 to the incident light guide part 14. A first angle θ1 formed by an extension direction d14 in the vicinity of the connection part of the incident light guide part 14 and an extension direction d16 in the vicinity of the connection part of the first light guide part 16 is formed to be smaller than a second angle θ2 formed by the extension direction d14 of the incident light guide part 14 and an extension direction d18 in the vicinity of the connection part of the second light guide part 18. In the connection part 20, a direction change element 26 is formed for guiding the guided light to the second light guide part 18 on a surface 24 opposing to the extension direction of the second light guide part 18.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicular lamp using a light guide, and more particularly to a vehicular lamp in which linear light emission branched by a columnar light guide is formed.

  As this type of vehicular lamp, as shown in Patent Document 1, two light guides and light sources arranged in two places are used to realize bifurcated linear light emission. is there.

Japanese Patent No. 5555592

  However, the lamp of Patent Document 1 requires a plurality of light guides and light source arrangements at a plurality of locations in order to realize branched linear light emission, and thus there is a problem of high cost.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a vehicular lamp that reduces the number of light guides and the arrangement of light sources used to form branched linear light emission. It is to provide.

  In order to achieve the above object, a vehicular lamp according to the present invention includes a light source and a front side from an emission surface along an extending direction while allowing light from the light source to enter from a light incident portion and guiding the light inside. A light guide that emits light toward the vehicle, wherein the light guide includes a columnar incident light guide having the light incident portion at one end, and a columnar first light guide. And a columnar second light guide part, and a connecting part that connects the first light guide part and the second light guide part to the incident light guide part. The first angle formed by the extending direction in the vicinity of the connecting portion and the extending direction in the vicinity of the connecting portion of the first light guide portion is equal to the extending direction of the incident light guide portion in the vicinity of the connecting portion and the second direction. The light guide part is formed smaller than a second angle formed by an extension direction in the vicinity of the connection part, and the connection part is on a surface facing the extension direction of the second light guide part. Wherein the serial direction changing element for guiding the light to the second light guide portion is formed.

  The direction changing element preferably has a shape that reduces a cross-sectional area in a direction orthogonal to the extending direction of the first light guide portion in the vicinity of the connecting portion of the first light guide portion.

  It is preferable that a diffuse reflection surface for diffusing the light to be guided is formed on the surface facing the emission surface in the vicinity of the connection portion of the second light guide portion.

  The diffuse reflection surface is formed with a reflection surface of a reflection step as a curved surface, and an extending direction in the vicinity of the connecting portion of the first light guide portion and an extending direction in the vicinity of the connecting portion of the second light guide portion When the opening angle of the light guide portion formed by is 30 to 60 degrees, the step size is preferably 1 to 2 mm and the R value of the curved surface is preferably 1.0 to 3.0.

  According to the first aspect of the present invention, branched linear light emission can be formed with one light guide and one light source arrangement.

  The light guide includes an incident light guide, and a first light guide and a second light guide branched from the incident light guide via the connecting portion. Since the light guide has a configuration in which the first angle on the first light guide portion side is smaller than the second angle on the second light guide portion side, the light guide from the incident light guide portion is the second light guide portion. Although it is easier to flow to the first light guide part, since the direction change element is formed in the connecting part, the amount guided by the direction change element is controlled to flow to the second light guide part. Thereby, even if it is the light guide body structure from which the incident light to a 1st light guide part and a 2nd light guide part becomes non-uniform | heterogenous on the shape of a branch, light guides are uniformly entered into both light guide parts It becomes possible. For this reason, variations in the shape of the light guide can be increased.

  According to the invention which concerns on Claim 2, a direction change element is good also as a shape which makes small the cross-sectional area of the direction orthogonal to the extension direction of this 1st light guide part in the vicinity of the connection part of a 1st light guide part. As a result, the light incident area of the first light guide portion is reduced, so that the light incident on the first light guide portion is suppressed, and the light guide is more uniformly incident on the first light guide portion and the second light guide portion. be able to.

  According to the third aspect of the present invention, a diffuse reflection element that diffuses the light guided to the surface facing the emission surface may be formed in the vicinity of the connecting portion of the second light guide. Thereby, since the light incident on the second light guide portion by the direction changing element is diffused by the diffuse reflection surface, it is possible to suppress the vicinity of the connecting portion of the second light guide portion from being lit up.

  According to the fourth aspect of the present invention, when the opening angle of the light guide portion is 30 degrees to 60 degrees, the diffuse reflection surface has a step size of the reflection step of 1 to 2 mm and a curved surface R value of 1.0 to 3. By designing with 0.0, the difference in brightness of the second light guide can be reduced.

It is a right perspective view of the vehicular lamp according to the first embodiment of the present invention. It is a longitudinal cross-sectional view of the light guide of FIG. It is a top view of the light guide of FIG. It is the figure which showed the light ray to the light guide of FIG. It is a figure which shows the fixing | fixed part of the light guide of FIG. 1, (a) is a front view of the light guide including a fixing part, (b) is a longitudinal cross-sectional view of the light guide including a fixing part, (c) ) Is a right side view of the light guide including a fixing portion. 6 is a diagram showing a modification of the first embodiment. FIG. It is a figure which shows the light guide which concerns on Embodiment 2 of this invention, (a) is a figure which shows a diffuse reflection surface, (b) is a figure which shows suitable conditions. It is a figure which shows the modification of Embodiment 2, (a) is a figure which shows the modification of a diffuse reflection surface, (b) is a figure which shows the modification of a combination, (c) is the further deformation | transformation of a diffuse reflection surface It is a figure which shows an example.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
1 is a right perspective view front view of a vehicular lamp 1 according to a first embodiment of the present invention. The vehicular lamp 1 (hereinafter simply referred to as “lamp 1”) is a headlamp in the present embodiment, and is disposed on the right in front of the vehicle. The front / rear / left / right / up / down directions used in the following are all as seen from the front of the vehicle.

  The lamp 1 has a substantially parallelogram shape when viewed from the front of the vehicle, and is curved along the streamline shape of the vehicle body as a whole, and the right portion of the lamp 1 is formed to wrap around the right side of the vehicle. The lamp 1 has a lamp chamber defined by a lamp body 2 and a translucent front cover 4 attached to the opening of the lamp body 2. In the lamp chamber, a high beam lamp A and a low beam lamp B are provided. And a clearance lamp C. In front of the lamp chambers of the lamps A and B, a blindfold extension 6 having an opening that allows the outgoing light to travel forward of the lamp is provided. The extension 7 for the lamp C will be described later.

  As the high beam lamp A and the low beam lamp B, a conventionally known reflection type or projector type lamp unit may be used. The configuration illustrated in FIG. 1 is a reflection type, and a light distribution pattern for high beam and low beam is formed by a light source and a reflecting mirror.

  The clearance lamp C includes an LED 10 and a light guide body 12. 2 is a longitudinal sectional view of the light guide 12 (cross sectional view taken along the line II-II shown in FIG. 1), and FIG. 3 is a top view of the light guide 12.

  The light guide 12 includes an incident light guide 14, a first light guide 16, a second light guide 18, and a connecting part 20. The light guide 12 is formed by injection molding a transparent resin such as acrylic or polycarbonate, and these are formed by integral molding.

  One end portion of the incident light guide portion 14 is configured as a light incident portion 14 a into which light from the LED 10 is incident. The other end is connected to the connecting portion 20. The incident light guide part 14 is formed in a substantially linear shape in a columnar shape, the light incident part 14a is arranged behind the right side of the lamp, and the connecting part 20 is arranged so as to appear in front of the right side of the lamp (FIG. 2). FIG. 3).

  The connection part 20 is a part which connects the 1st light guide part 16 and the 2nd light guide part 18 to the incident light guide part 14, and is a part shown by coloring in FIG.

  The first light guide portion 16 is one portion branched from the connecting portion 20, and one end portion of the first light guide portion 16 is connected to the connecting portion 20. The light guided from the incident light guide part 14 enters the first light guide part 16 from the connecting part 20. The 1st light guide part 16 is formed in the column shape substantially linearly, and is arrange | positioned in the form extended along the upper side shape of a lamp from the position of the connection part 20 (refer FIG. 1, FIG. 3). . The front surface side of the circumferential surface of the first light guide unit 16 is configured as an emission surface 16b that emits light (see FIG. 3). On the rear surface side of the peripheral surface of the first light guide unit 16, a plurality of reflection steps 16 c that reflect the light guide that travels in the first light guide unit 16 toward the output surface 16 b are extended from the first light guide unit 16. It is formed along the direction (see FIG. 3).

  The second light guide 18 is the other part branched from the connecting part 20. One end of the second light guide 18 is connected to the connecting part 20. The light guided from the incident light guide part 14 enters the second light guide part 18 from the connecting part 20. The 2nd light guide part 18 is formed in the substantially L shape in the column shape, and is arrange | positioned in the form extended along the shape of the right side and lower side of a lamp | ramp from the position of the connection part 20 (refer FIG. 1). ). The front surface side of the circumferential surface of the second light guide 18 is configured as an emission surface 18b that emits light (see FIG. 3). On the rear surface side of the peripheral surface of the second light guide 18, a plurality of reflection steps 18 c that reflect light traveling in the second light guide 18 toward the emission surface 18 b are extended in the direction in which the second light guide 18 extends. (See FIG. 2). The reflection steps 16c and 18c formed in the first light guide unit 16 and the second light guide unit 18 are formed by, for example, forming triangular prism-shaped grooves at a required interval.

  In this embodiment, the light guide 12, that is, the incident light guide part 14, the first light guide part 16, and the second light guide part 18, have a substantially circular cross-sectional shape perpendicular to the extending direction (longitudinal direction). However, the cross-sectional shape is not particularly limited, and may be a polygon.

Here, the light guide 12 has the following characteristics in the branched shape of the first light guide 16 and the second light guide 18. The light guide 12 has a direction _{d 16} extending in the vicinity portion 16e of the extending direction _{d 14} near portion 14e and the connecting portion 20 of the first light guiding unit 16 and the connecting portion 20 of the incident light guiding portion 14 the first angle θ1, the first angle θ2 which forms the extending direction d ₁₄ of the incident light guiding portion 14 and the extending direction d ₁₈ near portion 18e of the connecting portion 20 of the second light guiding unit 18 which forms (See FIG. 2).

  In the light guide body having such a shape, the light incident part (incident light guide part 14) is one light guide part (first light guide part 16) than the other light guide part (second light guide part 18). Are also connected flatly, the light guide from the light incident part (incident light guide part 14) easily flows to one (first light guide part 16) and hardly flows to the other (second light guide part 18). Has characteristics.

In contrast, the light guide 12 of this embodiment, the connecting portion 20, the surface 24 facing the second light guiding unit 18 (near a connection part 18e) extending direction _{d 18,} notches 26 (direction changing Element) is formed (see FIG. 2). In FIG. 2, a surface 24 facing the extending direction d _{18 that} is missing due to the notch 26 is indicated by a broken line.

Notch 26, the extending direction d ₁₈ facing the surface 24 of the connecting portion 20, substantially as it was cut off at right angles a triangular prism, so portion which becomes its most acute angle is located to the incident light guiding portion 14 side formed The plane 261 including the oblique side (see FIG. 4) is formed so as to be positioned on the second light guide 18 side. By forming the flat surface 261, the light guide direction at the connecting portion 20 is controlled (hereinafter, the flat surface 261 is referred to as a control reflecting surface 261). In addition, due to the notch depth 262 of the notch 26 (see FIG. 4), the cross-sectional area 161 in the direction orthogonal to the extending direction of the first light guide part 16 in the connection part vicinity 16e of the first light guide part 16 is It is configured to be smaller than the cross-sectional area 162 of the other part of the light guide unit 16 (see FIG. 4).

  The LED 10 is a light source that supplies light to the light guide 12. Two LEDs 10 are mounted in the vertical direction on the light source mounting portion 11 at positions facing the end face of the light incident portion 14a of the incident light guide portion 14 (see FIG. 4 and the like).

  In this embodiment, two LEDs (two chips) are arranged with respect to the light guide body 12, but one LED (one chip) or a plurality of LEDs 10 may be provided. When one lamp is arranged with respect to the light guide body 12, it is preferable to arrange it so as to face the axis of the incident light guide section 14. When a plurality of lamps are arranged, it is preferable that at least one lamp is arranged on the shaft center. However, when two lamps are arranged, as shown in the present embodiment, they are preferably arranged in the vertical direction via the axis. By arranging two LEDs 10 in the vertical direction, the light that guides the inside of the incident light guide unit 14 has a width in the vertical direction, which is higher than in the case where two lights are arranged in the horizontal direction via the axis. The light guide easily flows through the first light guide unit 16 and the second light guide unit 18 which are divided into two. Further, the reflection steps 16 c and 18 c formed on the first light guide 16 and the second light guide 18 are optically designed with respect to the axial centers of the first light guide 16 and the second light guide 18. For this reason, if two LEDs 10 are arranged in the left-right direction, the optical distance from the axial center to the reflection steps 16c and 18c may change and affect the light distribution, but the optical distance from the axial center to the step by arranging them vertically. Can be kept constant. A method of fixing the light source mounting unit 11 will be described later. In this embodiment, the LED 10 is used as a light source, but other light sources such as bulbs can be used. Moreover, it is also possible to use the light guide body 12 of this embodiment as a daytime running lamp by using a white light emitting element for both of the two LEDs 10. Alternatively, one LED 10 can be used as a clearance lamp or a daytime running lamp using a white light-emitting lamp, and the other LED 10 can be used as a turn signal lamp using an amber-colored light emitting lamp.

  The operation of the lamp 1 configured as described above will be described. FIG. 4 shows a part of the light beam incident on the light guide 12. When a current is supplied to the LED 10, light is emitted from the LED 10. The light emitted from the LED 10 enters the light guide 12 from the light incident portion 14 a of the incident light guide portion 14. The light incident on the incident light guide part 14 travels in the incident light guide part 14 while repeating total reflection, and enters the first light guide part 16 and the second light guide part 18 from the connecting part 20. The light that has reached the first light guide 16 is reflected by the light incident on the reflection step 16c on the rear surface toward the light exit surface 16b while traveling through the first light guide 16, and is emitted forward of the lamp. . On the other hand, since the notch 26 is formed in the connecting part 20, the part of the light guided from the incident light guide part 14 reflected by the control reflecting surface 261 of the notch 26 flows to the second light guide part 18. Be controlled. The light guided to the second light guide 18 is reflected in the light reflecting surface 18c toward the light exit surface 18b while traveling through the second light guide 18, and is emitted forward of the lamp. . In the 1st light guide part 16 and the 2nd light guide part 18, since the same reflection arises in reflection steps 16c and 18c provided along the extension direction, respectively, light is emitted from almost all areas on the emission surfaces 16c and 18c. Is emitted.

  As described above, according to the present embodiment, since the cutout 26 is provided in the connecting portion 20, the portion that has not entered the control reflection surface 261 of the cutout 26 flows into the first light guide portion 16, and the control reflection surface 261. Since the amount of light reflected on the second light guide 18 is controlled to flow to the second light guide 18, the LED 10 is disposed only at one location with respect to the incident light guide 14, and the light is guided to the branched light guides 16 and 18. Uniform light can be incident.

  In addition, since the cross-sectional area 161 (light incident area) of the first light guide portion 16 is reduced by forming the notch 26, the amount of light incident on the first light guide portion 16 is reduced by this amount, and the first light guide portion is reduced. The light guide can be made to enter the portion 16 and the second light guide portion 18 more uniformly.

  In the case where the notch 26 (direction changing element) is not provided, the first angle θ1 and the second angle θ2 are set to make the incident light amounts to the first light guide 16 and the second light guide 18 uniform. What is necessary is just to form the light guide 12 so that it may become substantially the same. However, under the constraint that the first angle θ1 and the second angle θ2 are substantially the same, if light emission that causes the second light guide 18 to branch downward is formed, the first light guide 16 is placed on the upper side of the lamp. The lamp cannot be extended along a straight line, and the lamp must be designed to expand the first light guide 16 to the upper left of the lamp, and the lamp is designed to expand the space above the first light guide 16. There is a need. However, by forming the notch 26 (direction changing element), the light guide shape (the first angle θ1 is the second angle) in which the light incident on the first light guide portion 16 and the second light guide portion 18 becomes non-uniform. The incident light quantity can be adjusted by the shape of the notch 26 (direction changing element). For this reason, the variation of a light guide shape can be increased and the space above the light guide 12 can also be aimed at. The adjustment of the amount of incident light according to the shape of the notch 26 will be described later.

  Next, a method for fixing the light guide 12 will be described. 5A and 5B are diagrams showing a fixing portion of the light guide 12, wherein FIG. 5A is a front view of the light guide 12 including the fixing portion, and FIG. 5B is a longitudinal section of the light guide 12 including the fixing portion. FIG. 5C is a right side view of the light guide body 12 including a fixing portion. FIG. The light guide 12 is fixed to the extension 7 at two points and to the lamp body 2 at three points.

  As shown in FIG. 5A, the light guide 12 includes the other end 16 d of the first light guide 16 extending to the left side of the lamp 1 and the other end of the second light guide 18. A fixing portion 15 extending from the upper part of the peripheral surface of the first light guide portion 16 and the second light guide portion 18 to the rear of the lamp is formed at the end portion 18d of the first light guide portion 18d. An engagement hole 15 a is formed in the fixed portion 15.

  The surface of the extension 7 is subjected to an aluminum vapor deposition process, and as shown in FIG. 5B, a semicircular arc-shaped groove is formed along the shape of the light guide 12 and is recessed behind the lamp. The rear surface side of the light guide 12 is accommodated in the groove. The extension 7 is formed with an insertion portion 7a into which the fixing portion 15 can be inserted at a position corresponding to the position where the fixing portion 15 is formed, and on the inner peripheral surface of the insertion portion 7a, A hook portion 7b that can be engaged with the engagement hole 15a is formed. The first light guide portion 16 and the second light guide portion 18 are fixed to the extension 7 by engaging the engagement hole 15 a and the hook portion 7 b by inserting the fixing portion 15 into the insertion portion 7 a.

  In addition, as shown in FIG. 5C, the light guide 12 is formed with a fixing rib 17 that extends upward from the upper portion of the peripheral surface of the incident light guide portion 14. A screw insertion hole is formed in the fixing rib 17, and the light guide 12 is screwed to the lamp body 2 or the like via the fixing rib 17. Thus, since the lamp 1 of this embodiment can form linear light emission branched by a single light guide body 12, the light guide body 12 may be fixed at least three places. As shown in FIG. 5C, the light source mounting portion 11 of the LED 10 is preferably screw-fixed in such a manner as to hang down from the fixing rib 17 in order to reduce the number of components.

(Modification of Embodiment 1)
FIG. 6 shows a modification of the first embodiment. The direction changing element formed in the connecting portion 20 (shown by coloring in FIG. 6) may be, for example, the control reflection step 260 in which triangular prism-shaped grooves are formed at a required pitch. The control reflection step 260 may be a plurality of fish-eye steps arranged in a grid pattern.

(Embodiment 2)
FIG. 7 is a diagram showing a light guide 12 according to Embodiment 2 of the present invention. FIG. 7A is a diagram showing a diffuse reflection surface, and is a light guide 12 and an enlarged view thereof in the same line of sight as FIG. About the same element as Embodiment 1, description is abbreviate | omitted using the same code | symbol. In the second embodiment, the light guide 12 is provided with a direction changing element (notch 26), and in the vicinity of the connecting portion 18e of the second light guide 18, the emission surface 18b of the second light guide 18 and A diffuse reflection surface 19 is formed on the opposing surface.

  The diffuse reflection surface 19 is obtained by changing the shape of the reflection step 18c formed on the surface facing the emission surface 18b, and the reflection surface 181 formed in the conventional plane in the triangular prism-shaped basic step of the reflection step 18c. Is a curved surface formed in a round shape that is recessed toward the axial center side of the second light guide 18. Thus, by forming the reflection step 18c in the connection portion vicinity 18e of the second light guide 18 on the diffuse reflection surface 19, the light incident on the second light guide 18 by the direction changing element (notch 26) is Since the diffused reflection surface 19 diffuses in the vicinity of the connecting portion 18e, the emitted light in the vicinity of the connecting portion 18e of the second light guide 18 is reduced, and as a result, the vicinity of the connecting portion 18e of the second light guide 18 is lit. Can be suppressed.

FIG. 7B is a view showing a preferable condition for the diffuse reflection surface 19. Diffuse reflection surface 19, the angular .theta.3 (light guide section formed between the extending direction _{d 18} of the extending direction _{d 16} near a connection part 16e of the first light guiding unit 16 connecting the vicinity 18e of the second light guiding unit 18 When the opening angle is 30 to 60 degrees, it is preferable that the step size 191 is 1 to 2 mm and the curved surface diffusion R value is 1.0 to 3.0 because the effect of suppressing spotlight is high.

  Here, it is also preferable to design the shape of the notch 26 (direction changing element) according to the branched shape of the light guide 12. In this embodiment, the opening angle θ3 of the light guide portion is approximately 60 degrees, but when the opening angle θ3 is small, the angle φ (see FIG. 4) of the notch 26 from the surface 24 of the control reflecting surface 261 may be small. When the opening angle θ3 is large, the angle φ of the control reflecting surface 261 of the notch 26 is preferably large. In other words, it is preferable that the opening angle θ3 of the light guide portion and the angle φ of the control reflection surface 261 are approximately the same because light is easily guided to the second light guide portion 18.

(Modification of Embodiment 2)
FIG. 8 is a diagram showing a modification of the second embodiment. First, FIG. 8A is a modification of the diffuse reflection surface 19. The diffuse reflection surface 19 may partially be a deformation step 190 in which the interval between the reflection steps 18c is widened. By reducing the number of steps in the vicinity of the connecting portion 18e of the second light guide portion 18, the emitted light in the vicinity of the connecting portion 18e of the second light guide portion 18 can be reduced.

FIG. 8B shows a modified example of the combination. The diffuse reflection surface 19 may be formed in a curved surface after combining the forms shown in FIGS. 7 and 8A to form the deformation step 190 by thinning out the basic reflection step 18c. .

FIG. 8C shows a further modification of the diffuse reflection surface 19. In addition to the embodiment shown in any of FIGS. 7 and 8 having the diffuse reflection surface 19 in FIGS. 7 and 8, the diffusion step 192 is also applied to the control reflection surface 261 on the direction changing element (notch 26) side. May be formed. For example, the control reflection surface 261 of the notch 26 may be formed with a curved surface instead of a flat surface. Thereby, in the connection part 20, a light guide is reflected and diffused by the control reflective surface 261, and is incident on the reflection step 18c formed in a region other than the connection part vicinity 18e of the second light guide part 18. Since the light increases, it is possible to further suppress the flashing of the vicinity of the connecting portion 18e.

  As mentioned above, although embodiment and the modification of the lamp 1 of this invention were described, these are examples of this invention, it is possible to combine each form and each modification based on the knowledge of those skilled in the art, Such forms are also included in the scope of the present invention. In addition, although the example which uses the light guide 12 of this invention for a clearance lamp was demonstrated as embodiment, the light guide 12 of this invention is used for marker lights, such as a tail lamp, a stop lamp, and a turn signal lamp. Also good.

1 vehicle lamp 10 LED (light source)
12 Light guide 14 Incident light guide 14a Light incident part 14e Incident light guide part vicinity 16 First light guide part 16b Outgoing surface 16c Reflection step 16e First light guide part vicinity 161 First light guide part sectional area 18 the second light guiding unit 18b emitting surface 18c reflected step 18e direction _{d 18} facing the surface 26 notched out 24 extending connecting portion near 19 diffuse reflection surface 20 connecting portion of the second light guide section (direction of connecting the vicinity of the Change element)
d14 Extension direction in the vicinity of the connection portion of the incident light guide portion d16 Extension direction in the vicinity of the connection portion of the first light guide portion d18 Extension direction θ1 in the vicinity of the connection portion of the second light guide portion First angle θ2 Second Angle θ3 Opening angle of light guide

Claims (4)

A vehicle lamp comprising: a light source; and a light guide that allows light from the light source to enter from a light incident portion and emits light forward from an emission surface along an extending direction while guiding the light inside. And
The light guide is
A columnar incident light guide part provided with the light incident part at one end part;
A columnar first light guide;
A columnar second light guide,
A connecting portion for connecting the first light guide portion and the second light guide portion to the incident light guide portion;
The first angle formed between the extending direction of the incident light guide near the connecting portion and the extending direction of the first light guiding portion near the connecting portion is near the connecting portion of the incident light guiding portion. It is formed smaller than the second angle formed by the extending direction and the extending direction in the vicinity of the connecting portion of the second light guide unit,
The vehicular lamp according to claim 1, wherein a direction changing element for guiding the light guide to the second light guide part is formed on a surface of the connecting part facing the extending direction of the second light guide part.
The direction changing element has a shape that reduces a cross-sectional area in a direction orthogonal to an extending direction of the first light guide portion in the vicinity of the connecting portion of the first light guide portion. The vehicle lamp as described.
The vehicular vehicle according to claim 1 or 2, wherein a diffuse reflection surface for diffusing the light to be guided is formed on a surface facing the emission surface in the vicinity of the connection portion of the second light guide portion. Light fixture.
  The diffuse reflection surface is formed with a reflection surface of a reflection step as a curved surface, and an extension direction in the vicinity of the connection portion of the first light guide portion and an extension direction in the vicinity of the connection portion of the second light guide portion. 4. The step size is set to 1 to 2 mm and the R value of the curved surface is set to 1.0 to 3.0 when the opening angle of the light guide unit formed is 30 degrees to 60 degrees. 5. Vehicle lamp.