JP5937339B2 - Vehicle signal lights - Google Patents

Description

  The present invention relates to a signal lamp provided at the rear end of a vehicle, for example, a rear combination lamp, and relates to a vehicle signal lamp using a light emitting diode (hereinafter referred to as “LED”) as a light source.

  Many vehicle signal lamps in recent years use LEDs as light sources. The way of using light from a lamp using an LED can be broadly divided into a lamp that directly emits light from the LED, a lamp that reflects and irradiates light from the LED with a reflecting surface, and a light guide. There are lights. As a lamp that emits light using a light guide, for example, a vehicle lamp of Patent Document 1 shown in FIG. 12 is known.

  In the vehicular lamp 90 of Patent Document 1, a lens (outer cover) is attached to the front surface of a container-shaped lamp housing having an opening on the front surface by appropriate means such as ultrasonic welding and adhesion so as to cover the front opening portion. In the housing, a plurality of LEDs (light emitting diodes) 95 as light sources are arranged on a printed circuit board 94 arranged in a grid or a line.

  Further, in front of each LED 95, a substantially bowl-shaped reflector 96 formed of a transparent member corresponding to each LED and having an opening on the front side is provided. These reflectors 96 have a front opening edge formed in a hexagonal shape when viewed from the front. The reflector 96 is formed of a colorless or colored transparent resin. A concave portion 96a for accommodating the LED 95 is formed on the top portion on the back surface side, and a convex portion 96d is formed on the front surface side facing the LED 95. A reflective surface 96b that totally reflects light from the LED 95 is formed on the portion other than the concave portion 96a on the back side by appropriately performing a reflective process such as an aluminum vapor deposition process or a total reflection prism cut, and further a reflective surface 69b. The light guides 96c that guide at least a part of the reflected light to the front side of the lamp are integrally formed to constitute each reflector 96.

  Since the vehicular lamp 90 of Patent Document 1 is configured as described above, the light from the LED 95 as a light source is reflected by the reflecting surface 96b of the reflector 96 and at least a part of the reflected light is reflected in the reflector 96. The light guide unit 96c is guided to the light guide unit 96c. Thereby, the lighting visibility in the oblique direction view at the time of lighting is also improved. Further, it is possible to provide an appearance that takes into consideration the design shape and color of the reflector 96 when the lamp is not lit.

JP 2000-067610 A

  However, the above-described conventional vehicle lamp basically irradiates the LED in the emission direction. For this reason, in order to brighten the vehicular lamp, it is necessary to improve the number of LEDs 95 accommodated in the recess 96a. However, if the number of LEDs accommodated in the concave portion 96a is increased, the amount of light emitted through the convex portion 96d can be easily increased, but the ratio of the light emitted through the light guide portion 96c is relatively reduced, and the light is guided. The amount of light passing through the body does not increase much. Therefore, the impression that the line-shaped exit surface irradiates is poor. In addition, if the brightness of each LED 95 is increased, the light emitted from the reflector 96 can also be increased, but the amount of light emitted through the convex portion 96d also increases at the same time, so that irradiation from the line-shaped emission surface is performed. There is a problem that it is difficult to increase the amount of light to be generated.

  Accordingly, the present invention has been made in view of the above problems, and the object of the present invention is to provide a new-looking vehicle signal lamp that can increase the amount of light from the line-shaped exit surface with a simple configuration. Is to provide.

In order to achieve the above object, a vehicle signal lamp according to the present invention includes:
A translucent semi-cylindrical light guide body having a U-shaped front view, rear view, and cross section;
A plurality of LED light sources provided on each of the two end faces of the semi-cylindrical light guide,
The semi-cylindrical light guide corresponds to a U-shaped front surface, a rear surface located on the opposite side of the front surface, a semi-cylindrical side surface connecting the front surface and the rear surface, and an edge of the side surface. The side surface comprises a bottom side surface, a first side wall and a second side wall connected to the bottom side surface,
The end surface is a stepped incident surface,
Each emission surface of the plurality of LED light sources is arranged to face the incident surface,
Reflection on the rear surface that intersects the end face, the a reflecting surface formed by cutting a part of the cylindrical surface of the semi-cylindrical light guide, formed by cutting a part of the outer peripheral surface of said bottom side from said rear surface A surface is formed,
Irradiation light from the plurality of LED light sources is emitted from the front surface intersecting the end surface,
The semi-cylindrical inner peripheral surface of the side surface is a diffusion surface,
The reflective surface is an inclined surface whose interval gradually decreases from the rear surface toward the front surface,
The plurality of LEDs provided corresponding to each of the two end faces is a group of LEDs constituting at least a first light source group and a second light source group, and an optical axis of each LED is the incident surface. It is placed facing
The LED of the first light source group is located on the front surface side, and the irradiation light passes through the inside of the semi-cylindrical light guide and proceeds toward the bottom side surface of the side surfaces.
The LEDs of the second light source group are located on the rear surface side, and the irradiation light travels toward the rear surface through the inside of the semi-cylindrical light guide,
Of the light emitted from the LEDs of the first light source group, part of the light traveling toward the bottom side surface of the side surface is reflected by the reflection surface and travels to the front surface through the inside of the bottom side surface. It is assumed
A part of the irradiation light of the LED of the first light source group and a part of the irradiation light of the LED of the second light source group are irradiated in a U shape from the front surface,
A translucent lens portion that emits light from another light source different from the LED light source is provided on the inner peripheral side of the semi-cylindrical light guide.

The invention according to claim 1 is characterized in that the rear surface is a rear total reflection surface that is inclined with respect to the emission central axis of the LED light source.

According to the first aspect of the present invention, light from a plurality of LED light sources provided on each of the two end faces of the semi-cylindrical light guide is emitted from the front surface of the semi-cylindrical light guide in a line shape. It is possible to increase the amount of light from the line-shaped emission surface with a simple configuration.
Irradiation can be performed with a line-shaped light emission and another light emission surrounded by the line-shaped light emission.
In addition, it is possible to increase the amount of light in a portion that tends to be dark in the front surface of the semi-cylindrical light guide, and it is possible to increase the uniform light emission of the line light emission.

By setting it as invention of Claim 2 , it becomes possible to reflect the irradiation light from LED provided in the end surface of a semi-cylindrical light guide to the front side efficiently.

FIG. 1 is a schematic front view showing a state in which a rear lamp according to the present invention is attached to a rear part of a vehicle body. FIG. 2 is an exploded perspective view for explaining the configuration of the tail and stop lamp unit of FIG. 3A and 3B are perspective views for explaining the tail lens of FIG. 1, in which FIG. 3A is a perspective view seen from the front side, and FIG. 3B is a perspective view seen from the rear side. 4 is a perspective view for explaining the relationship between the tail lens of FIG. 3 and the LED light source, and FIG. 4 (A) is a perspective view seen from the front side showing the state in which the LED light source is arranged in FIG. 3 (A). FIG. 4B is a perspective view seen from the rear side showing a state in which the LED light source is arranged in FIG. FIG. 5 is a side view of the tail lens of FIG. 6 is a cross-sectional view taken along line AA in FIG. FIG. 7 is a front view of the tail lens of FIG. 8 is a cross-sectional view taken along line BB in FIG. FIG. 9 is a rear view of the tail lens of FIG. 10 is a cross-sectional view taken along the line CC of FIG. FIG. 11 is a perspective view schematically showing the stop lens of FIG. 1 in an enlarged manner. FIG. 12 is a schematic cross-sectional view showing a main part of a conventional vehicle lamp.

  Hereinafter, a vehicle signal lamp according to an embodiment of the present invention will be described with reference to FIGS.

FIGS. 1 and 2 illustrate a rear lamp 5 provided at the rear end of a vehicle body as an example of a vehicle signal lamp according to the present invention. FIG. 1 is a schematic front view showing a state of attachment to the rear portion of the vehicle body. It is a disassembled perspective view for demonstrating the structure of the tail & stop lamp unit of FIG.
In the following description and drawings, the vehicle reverse direction is represented as the x direction (the vehicle traveling direction is represented as -x direction, the vehicle upper direction is represented as z direction, the vehicle traveling direction right side is represented as y direction, and the left side is represented as -y direction. Shows the rear lamp on the left side as viewed from the driver of the vehicle.

  The rear lamp 5 is a lamp installed at the rear end of the vehicle body 2 as shown in FIG. 1, and is covered with a translucent outer cover (not shown). The rear lamp 5 includes a tail & stop lamp unit 1, a side lamp unit 3, a backup lamp unit 4, and a retroreflective element (not shown) in order from the top. The outer cover is made of a single translucent resin that covers all of these units, and has a transparent shape.

  In the present invention, the tail & stop lamp unit 1 includes a taillight 10 having a line-shaped light emitting portion 10a and a stoplight 20 having a trapezoidal planar light-emitting portion 20a located inside the line-shaped light emitting portion 10a. In FIG. 1, three tail lights 10 and three stop lights 20 are provided.

  In FIG. 1, a first tail & stop lamp unit 1a, a second tail & stop lamp unit 1b, and a third tail & stop lamp unit 1c are provided in this order from the side of the vehicle (left side of the paper), and each unit 1a, 1b, 1 c includes a taillight 10 and a stoplight 20. The first tail & stop lamp unit 1a, the second tail & stop lamp unit 1b, and the third tail & stop lamp unit 1c are similar in shape, and the light emitting area in the lateral direction of the vehicle, that is, the first tail & stop lamp unit 1a. To make it smaller. By changing the light emitting area of each unit in the y and -y directions, it is possible to give the following driver a feeling of depth between the center side and the side side of the vehicle.

The tail & stop lamp unit 1 will be described with reference to FIG.
The taillight 10 includes a tail lens 11 made of a translucent resin material such as red acrylic resin, a fixed frame 12 to which the tail lens 11 is attached, a plurality of LED light sources 13, a tail light housing 15, and a tail lens fixed. It consists of the member 14.
The stoplight 20 includes a light-transmitting resin material, for example, a stop lens 21 made of red acrylic resin, an LED mounting substrate 23 on which an LED light source that irradiates the stop lens 21 is mounted, and a front side of the LED mounting substrate 23. It comprises an inner lens 22 to be provided and a stoplight housing 24.

  The tail lens 11 includes a front surface 11a that is U-shaped as shown in FIG. 1 in a front view (view from the x direction), a rear surface 11b that is located on the opposite side of the front surface 11a, and a front surface 11a and a rear surface 11b. The side surface 11d which connects between and the end surface 11c corresponded to edges other than the front surface 11a and the rear surface 11b of the side surface 11d are provided. The tail lens 11 basically has a semi-cylindrical shape obtained by cutting a substantially square tube obliquely with respect to the central axis AX (see FIG. 8) of the tube. Further, the light guide is formed by using a transparent resin material and not providing an acute inflection point on the side surface 11d. The side surface 11d corresponds to a semi-cylindrical cylindrical surface. The tail lens 11 will be described in detail later.

Fixed frame 12 is a metal or is formed by a material excellent in rigidity, such as ABS resin, total six tail provided on both sides of the three places of the opening 12a and each opening 12a for securing the stop light 20 A lens mounting groove 12b and a fixed leg 12c for mounting to the rear lamp housing 6 are provided. The opening 12a and the tail lens mounting groove 12b are inclined with respect to the x-axis.

  The LED light source 13 is composed of a group of LEDs provided on each of the end surfaces 11d of the tail lens 11. In the present embodiment, the LED light source 13 is composed of a total of six LED groups. Each LED group is mounted in a taillight housing 15, and a wiring (not shown) is provided in each taillight housing 15. A taillight housing 15 having a plurality of LEDs 13 mounted thereon is attached to the tail lens 11 and inserted into the tail lens attaching groove 12b, and then the fixing frame 12 and the tail lens 11 are fastened and fixed by the tail lens fixing member 14. .

  The stoplight 20 is also attached to the fixed frame 12 and integrated. The stop lens 21 is disposed on the inner peripheral side (the central axis side of the virtual cylindrical body) of the side surface 11c of the tail lens. Before attaching the tail lens 11 to the fixed frame 12, the stoplight 20 is attached in advance to the opening 12 a of the fixed frame 12.

  The stop lens 21 is a box-shaped body made of a transparent acrylic resin. A front surface 21a corresponding to the bottom of the box, an opening surface 21b corresponding to the opening of the box, side surfaces 21c and 21c corresponding to both side surfaces of the box, an upper surface 21d and a lower surface (not shown). The inclined emission surface is inclined with respect to the angle.

  The LED mounting board 23 has four red LEDs mounted on a printed board, and the LEDs are mounted so that the main irradiation direction is on the front surface 21a side. The LED mounting board 23 is provided with a locking hole for fixing the hook 22a of the inner lens 22, and the inner lens 22 is attached and fixed.

The stoplight housing 24 includes a recess 23a for mounting the LED mounting board 23 therein, and the recess 23a corresponding to the adjacent stop lens 21 is integrally molded of black resin as shown in FIG. The mounting position accuracy with respect to the fixed frame 12 can be improved by molding integrally. Moreover, the depth feeling of the stoplight 20 can be improved by molding with black resin.
The LED mounting board 23 and the inner lens 22 are attached to the stoplight housing 24 and fastened to the fixing frame 12 with fixing screws (not shown).

  Next, the taillight 10 will be described in detail with reference to FIGS.

  3A and 3B are perspective views illustrating the tail lens 11. FIG. 3A is a perspective view seen from the front surface 11a side in the irradiation direction, and FIG. 3B is a perspective view seen from the rear surface 11b side. In FIG. 3, reference numerals (1a), (1b), and (1c) given in parentheses denote the first tail & stop lamp unit 1a, the second tail & stop lamp unit 1b, and the third tail & stop lamp unit. 1c, which indicates which unit the tail lens 11 corresponds to (which is the same in FIG. 4). FIG. 4 is a perspective view for explaining the relationship between the tail lens 11 and the LED light source 13 in FIG. 3. FIG. 4 (A) shows the state in which the LED light source is arranged in FIG. FIG. FIG. 4B shows a state in which the LED light source is arranged in FIG. 3B, and is a perspective view seen from the rear surface 11b side.

  FIGS. 5 to 10 are diagrams for explaining light rays emitted from the LED light source in a state where the LED light source of FIG. 4 is arranged. 5 is a side view seen from the −y direction, that is, the side surface direction, and FIG. 7 is a front view seen from the x direction, that is, the front direction, and FIG. 8 is a cross-sectional view taken along line BB of FIG. 9 is a front view seen from the -x direction, that is, the rear surface direction, and FIG. 10 is a cross-sectional view taken along the line CC of FIG.

  As shown in FIGS. 3 and 4, the three tail lenses 11 (1a), 11 (1b), and 11 (1c) have similar shapes and are different in size. The front surface 11a of each tail lens 11 is a rough surface subjected to a diffusion process. The rear surface 11b is a flat inclined surface. The side surface 11c is a planar curved surface, and the inner peripheral surface 11c1 and the outer peripheral surface 11c2 are rough surfaces that have been subjected to diffusion processing by embossing. Each tail lens 11 is formed with at least two end surfaces 11d, and the end surfaces 11d and 11d are stepped. Further, each tail lens 11 corresponds to a shape obtained by cutting out a part of a rectangular tube with a rounded corner having a virtual axis AX as a central axis shown in FIG. 8, and three of the cylindrical surfaces are side surfaces 11c. The three side surfaces 11c include a bottom side surface 11c3 having a U-shaped cross section, a first side wall 11c4, and a second side wall 11c5. In addition, in this embodiment, although it was set as the substantially half square cylinder shape, it is not restricted to this. A semi-cylindrical shape or other semi-curved cylindrical shape may be used.

  The LED light source 13 is a surface-mounted red LED, and is disposed so as to face the end surface 11d having a light emission surface 13a having a stepped shape. Preferably, the flat surface corresponding to each step of the stepped end surface 11d and the emission surface 13a are opposed to each other, and the optical axis of each LED light source 13 and each flat surface are orthogonal to each other. By installing in this way, the number of LED light sources 13 corresponding to each stepped flat surface can be provided, and the light emitted from each LED light source can be efficiently guided into the tail lens 11. More preferably, an incident surface made of a hemispherical surface with each LED light source corresponding to each flat surface as a center point is formed. By doing in this way, incident efficiency can be improved further. The end surface 11d is formed by molding the end surfaces of the first side wall 11c4 and the second side wall 11c5 in a step shape.

In this embodiment, as shown in FIG. 8, nine LED light sources are provided for each end face 11b, and the optical axes from the nine LED light sources are parallel.
At this time, the irradiation light of the first light source group 13G1 including the seven LED light sources 13 on the front surface 11a side is set to travel toward the bottom side surface 11c3 of the side surface 11c. The irradiation light L1 from the LED light source 13 traveling toward the bottom side surface 11c3 is partially reflected on the outer peripheral side surface 11c2 of the first side wall 11c4 (second side wall 11c5) as shown in FIG. After the reflection, a part of the light reaches the bottom side surface 11c3 and is further internally reflected by the bottom side surface 11c3. At this time, the side surface 11c is subjected to diffusion treatment, and part of the light is emitted from the side surface 11c simultaneously with internal reflection.
Further, the irradiation light L2 from the second light source group 13G2 composed of the two LED light sources 13 on the rear surface 11b side is set to be parallel to the irradiation light L1 and proceed toward the rear surface 11b. The light beam L2 internally reflected by the rear surface 11b travels toward the front surface 11a. At this time, since the rear surface 11b is a flat surface, the light beam L2 can be efficiently internally reflected.

  The ratio of the number of LED light sources 13 in the first light source group 13G1 and the second light source group 13G2 is not limited to 7: 2. When it is desired to further emphasize the irradiation light from the line-shaped light emitting unit 10a, the ratio of the light source of the second light source group 13G2 to the ratio of 4: 6 or the like is increased so that the irradiation intensity of the LEDs of the second light source group 13G2 becomes higher. It is sufficient to increase the number of LEDs, use LEDs with high luminance of the second light source group 13G2, or increase the drive current. In the present embodiment, LEDs used for the second light source group 13G2 are lighted with the same current using LEDs having higher brightness than those of the first light source group 13G1.

  A notch 30 is formed in the rear surface 11b. As shown in FIGS. 3 (B) and 4 (B), the notch 30 is formed by notching a part of the outer peripheral surface of the bottom side surface 11c3 from the rear surface 11b, and has a triangular cross section as shown in FIG. It has a shape. The surface formed by this notch acts as an internal reflection surface using the refractive index difference between the translucent resin and the atmosphere.

  As described above, the light L1 of the irradiation light of the first light source group 13G1 is partially reflected on the outer peripheral side surface 11c2 of the first side wall 11c4 (second side wall 11c5), and then partially reflected after the inner surface reflection. Reaches the bottom side surface 11c3 and is further internally reflected at the bottom side surface 11c3 (see FIG. 6). Next, a part of the light beam L1 reflected from the inner surface reaches the side surface of the notch 30 as shown in FIG. The light beam internally reflected by the notch reflection surface 31 is defined as L3. The light beam L3 travels inside the bottom side surface 11c3 toward the front surface 11a and is irradiated from the front surface 11a. The light quantity can be adjusted from the front surface 11a by adjusting the depth and thickness of the notch 30 as appropriate.

  When the LED 13 is turned on, the substantially U-shaped entire surface 11a including the front surface of the bottom side surface 11c3, the front surface of the first side wall 11c4, and the front surface of the second side wall 11c5 can be emitted in a line shape. Further, since the side surface 11c is a diffusion surface, the entire side surface 11c also emits light. Therefore, in the taillight 10, the line-shaped light emitting portion 10a irradiates the vehicle rear, and the side surface 11c irradiates the vicinity of the vehicle rear as the surface light emitting portion.

  Next, the stoplight 20 will be described in detail with reference to FIGS. FIG. 11 is a perspective view schematically showing the stop lens 21 in an enlarged manner.

  A predetermined lens cut is provided on the front surface 21a of the stop lens 21, and the light emitted from the LED mounted on the LED mounting substrate 23 is refracted so as to have a predetermined light distribution characteristic. A lens cut is not provided on the upper surface 21d and the lower surface, and a transparent shape is provided. A reflector 7 provided in the rear lamp housing is formed above the stop lens 21 so as to cover the upper mold of the fixed frame 12 (see FIG. 1). A first region 21c1, a second region 21c2, and a third region 21c3 are formed on the side surface 21c. The first region 21c1 is subjected to a graining process on the surface to form a diffusion surface. The second region 21c2 has a silver diffusive reflecting surface that has been subjected to graining on the surface and further silver-deposited on the surface to make it cloudy. The third region 21c3 is a reflective surface obtained by performing silver deposition on a flat surface.

  When the stop lens light 20 is viewed, a refractive lens cut whose front surface 21a is transparent is viewed in a non-lighting state. Since the U-shaped tail lens 11 formed of red resin is arranged in parallel around the periphery, the state surrounded by the red lens is visually recognized. At this time, the third region 21c3, which is a silver reflective surface, is present on the side surface 21c at a deep position, so that it is reflected by the third region 21c3 through the stop lens 21 and / or the tail lens 11. Thereby, a feeling of depth can be given to those who observe the lamp. In particular, since the second area is provided, it is felt that there is a contrast, so that a sense of depth can be further enhanced. In the lighting state, light emission by the red LED is viewed through the front surface 21a, the upper surface 21d, and the lower surface. When viewed from the side surface 21c side, red light emission is diffused and emitted from the first region 21c1 which is a diffusion surface, and the diffused light reaches the inner peripheral surface 11c1 of the tail lens 11 and is on the inner peripheral side of the tail lens 11. Further diffuse reflection at the surface 11c1. The light diffusely reflected by the inner peripheral surface 11c1 of the tail lens 11 is reflected again by the second region 21c2 and the third region 21c3 to increase the degree of diffusion. Thereby, a feeling of depth can be enhanced even in the lighting state.

  Next, a second embodiment will be described.

  In the first embodiment, all of the three taillights 10 are irradiated with red light using the red LED light source 13. Thus, in the second embodiment, the turn lamp is replaced by replacing the LED used for the taillight 10 and the stoplight of the first tail & stop lamp unit 1a located on the outermost side with the LED that emits amber color. A unit.

  Since the amber LED light is emitted through the transparent stop lens (inner peripheral lens) and the red tail lens (outer peripheral lens), it is observed as a rear lamp having a high unity feeling in the non-lighting state. In the lighting state, red light emission is emitted from the tail & stop lamp unit, and amber light emission is emitted from the turn lamp unit, so that a rear lamp with improved design uniformity can be obtained.

  The above embodiment is merely an example in all respects. The present invention is not construed as being limited to these descriptions. For example, the LED light source may be mounted in another color, for example, a red light emitting LED, an amber light emitting LED, and a white light emitting LED in the same lamp unit, and each color LED can be selectively lit. . The present invention can also be applied to a rear lamp in which a stop lens 21 that is an inner peripheral lens is provided at a position deeper than a tail lens that is an outer peripheral lens. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

  The present invention can be applied to various lamps that emit line light and surface light.

DESCRIPTION OF SYMBOLS 1 Tail & stop lamp unit 2 Car body 3 Side lamp unit 4 Backup lamp unit 5 Rear lamp 6 Rear lamp housing 10 Taillight 11 Tail lens 12 Fixed frame 13 LED light source 14 Tail lens fixing member 15 Taillight housing 20 Stoplight 21 Stop lens 22 Inner lens 23 LED mounting substrate 24 Stoplight housing 90 Vehicle lamp 94 Printed circuit board 95 LED (light emitting diode)
96 reflector

Claims (2)

A translucent semi-cylindrical light guide body having a U-shaped front view, rear view, and cross section;
A plurality of LED light sources provided on each of the two end faces of the semi-cylindrical light guide,
The semi-cylindrical light guide corresponds to a U-shaped front surface, a rear surface located on the opposite side of the front surface, a semi-cylindrical side surface connecting the front surface and the rear surface, and an edge of the side surface. The side surface comprises a bottom side surface, a first side wall and a second side wall connected to the bottom side surface,
The end surface is a stepped incident surface,
Each emission surface of the plurality of LED light sources is arranged to face the incident surface,
Reflection on the rear surface that intersects the end face, the a reflecting surface formed by cutting a part of the cylindrical surface of the semi-cylindrical light guide, formed by cutting a part of the outer peripheral surface of said bottom side from said rear surface A surface is formed,
Irradiation light from the plurality of LED light sources is emitted from the front surface intersecting the end surface,
The semi-cylindrical inner peripheral surface of the side surface is a diffusion surface,
The reflective surface is an inclined surface whose interval gradually decreases from the rear surface toward the front surface,
The plurality of LEDs provided corresponding to each of the two end faces is a group of LEDs constituting at least a first light source group and a second light source group, and an optical axis of each LED is the incident surface. It is placed facing
The LED of the first light source group is located on the front surface side, and the irradiation light passes through the inside of the semi-cylindrical light guide and proceeds toward the bottom side surface of the side surfaces.
The LEDs of the second light source group are located on the rear surface side, and the irradiation light travels toward the rear surface through the inside of the semi-cylindrical light guide,
Of the light emitted from the LEDs of the first light source group, part of the light traveling toward the bottom side surface of the side surface is reflected by the reflection surface and travels to the front surface through the inside of the bottom side surface. It is assumed
A part of the irradiation light of the LED of the first light source group and a part of the irradiation light of the LED of the second light source group are irradiated in a U shape from the front surface,
A vehicular signal lamp characterized in that a translucent lens portion for emitting light from another light source different from the LED light source is provided on the inner peripheral side of the semi-cylindrical light guide.   2. The vehicular signal lamp according to claim 1, wherein the rear surface is a rear total reflection surface that is inclined with respect to an emission center axis of the LED light source.

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