JP2018055992A - Lighting fixture unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain emitting light with high luminance and less luminance unevenness from a rod-shaped light guide part and a plate-like light guide part, in a light guide body having a configuration in which the two rod-shaped light guide parts aligned in parallel are integrally connected in the plate-like light guide part.SOLUTION: A lighting fixture unit is such that: a first rod-shaped light guide part 10 is provided with a lens cut 11 which directs light emitted from a first LED 3a as a light source and guided in the first rod-shaped light guide part 10 toward a plate-like light guide part 30 side; the plate-like light guide part 30 is provided with a plurality of linear lens cuts 31 which direct light guided from the first rod-shaped light guide part 10 toward a light emission surface 32 side of the plate-like light guide part 30; and a second rod-shaped light guide part 20 is provided with a lens cut 21 which directs light emitted from a second LED 3b as a light source and guided in the second rod-shaped light guide part 20 toward a light emission region 22 side of the second rod-shaped light guide part 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lamp unit using a light guide, and the lamp unit constitutes a part of a vehicular lamp.

  Conventionally, as this kind of lamp unit, there is one disclosed in Patent Document 1, for example.

  The lamp unit disclosed in Patent Document 1 is built in a headlamp (lamp) as a clearance lamp.

  As shown in FIG. 14, the clearance lamp 80 has a cross-section at a branching portion 84 that passes through a light guide portion 83 having a predetermined length from one end portion of a first light guide body 81 having a circular cross-section. A second light guide 82 made of a circular light guide rod branches off from the first light guide 81 and extends.

  Each of the first light guide 81 and the second light guide 82 extends in the short direction on one side in a direction orthogonal to the branching direction of the first light guide 81 and the second light guide 82. A first reflecting surface 81a and a second reflecting surface 82a are formed by arranging a plurality of prisms in the longitudinal direction.

  A flat light guide plate 85 that integrally connects the first light guide 81 and the second light guide 82 is formed between the first light guide 81 and the second light guide 82. A through hole 86 is provided at the base of the branching portion 84 between the light body 81 and the second light guide 82. In other words, the through hole 86 is formed so as to be surrounded by the first light guide 81, the second light guide 82 and the flat light guide plate 85.

  Therefore, the light emitted from the light emitting element 87 disposed in the vicinity of the end face of the first light guide 81 enters the light guide 83 from the end face of the first light guide 81 to guide the light. The light is guided through the portion 83 and branched into the first light guide 81 and the second light guide 82 at the branching portion 84. In this case, the through-hole 86 efficiently performs light branching by suppressing leakage loss of light branching at the branching portion 84.

  The light branched into the first light guide 81 and the second light guide 82 is guided toward the respective end portions while repeating internal reflection in the first light guide 81 and the second light guide 82. A part of the light that is emitted and guided through the first light guide 81 and the second light guide 82 is reflected by the respective reflection surfaces 81a and 82a and faces the reflection surfaces 81a and 82a. Is emitted toward the outside, and a part of the light being guided in the first light guide 81 and the second light guide 82 is guided in the flat light guide plate 85 to be a flat light guide plate. The light is emitted toward the outside from the light emitting surface having the embossing applied to 85, and at the same time, the light is emitted from one end surface of the flat light guide plate 85 to the outside as edge light.

Japanese Patent Application Laid-Open No. 2014-7014

  By the way, the clearance lamp 80 having the above configuration distributes a part of the light guided through the first light guide 81 and the second light guide 82 to the light guide of the flat light guide plate 85. Therefore, the amount of light emitted outward from each of the first light guide 81 and the second light guide 82 is reduced and bright from each of the first light guide 81 and the second light guide 82. It is difficult to obtain outgoing light.

  Further, in the flat light guide 85, a part of the light guided through the first light guide 81 and the second light guide 82 is distributed. Is. Therefore, when light is distributed, light that does not go to the flat light guide portion 85 is generated, the light use efficiency is reduced, and the amount of light emitted from the flat light guide portion 85 to the outside is reduced and bright. It is difficult to obtain outgoing light.

  Therefore, the present invention was devised in view of the above problems, and the object of the present invention is to provide a light guide comprising a structure in which two bar-shaped light guides arranged side by side are integrally connected by a plate-like light guide. In the body, it is to obtain emitted light with high luminance and little luminance unevenness from each of the rod-shaped light guide and the plate-shaped light guide.

  In order to solve the above-described problem, the invention described in claim 1 of the present invention is configured such that the first rod-shaped light guide unit, the second rod-shaped light guide unit, and the two rod-shaped light guide units are integrally formed. A light guide including a plate-shaped light guide unit, a first light source disposed in the vicinity of the end surface of the first bar-shaped light guide unit, and a second light source disposed in the vicinity of the end surface of the second bar-shaped light guide unit. In the vehicular lamp provided with a light source, the first rod-shaped light guide includes a first lens cut, and the second rod-shaped light guide includes a second lens cut and a rod-shaped emission surface, The plate-shaped light guide part includes a third lens cut, an incident part formed at an edge, and a planar emission surface, and the first lens cut transmits light emitted from the first light source. Reflecting toward the incident portion of the plate-shaped light guide portion, the second lens cut directs the light emitted from the second light source toward the rod-shaped emission surface. Was Isa, the plate-like light guiding portions is characterized in that for reflecting the light from said first rod-shaped light guide portion toward the planar exit surface.

  The invention described in claim 2 of the present invention is characterized in that, in claim 1, the second lens cut and the third lens cut are formed on substantially the same side of the light guide. To do.

  According to a third aspect of the present invention, in the first or second aspect, the first lens cut and the second lens cut are the first rod-shaped light guide and the first lens cut, respectively. The third lens cut is formed along the longitudinal direction of a two-bar light guide, and extends from the first bar-shaped light guide toward the second bar-shaped light guide. To do.

  In addition, the invention described in claim 4 of the present invention further includes an extension according to any one of claims 1 to 3 so that the entire area of the first rod-shaped light guide portion cannot be visually recognized by the extension. It is covered, At least one part of the said 2nd rod-shaped light guide part and the said plate-shaped light guide part is not covered with the said extension, It is characterized by the above-mentioned.

  Moreover, the invention described in claim 5 of the present invention is any one of claims 1 to 4, wherein the first rod-shaped light guide portion is formed behind the second rod-shaped light guide portion, The extending direction of the plate-shaped light guide portion from the first rod-shaped light guide portion to the second rod-shaped light guide portion is obliquely rearward with respect to the central axis extending in the front-rear direction of the second rod-shaped light guide portion. It is characterized by touching.

  According to the present invention, the first rod-shaped light guide is provided with a lens cut that directs the light emitted from the first light source and guided through the first rod-shaped light guide to the plate-shaped light guide. The light section is provided with a plurality of linear lens cuts for directing light guided from the first rod-shaped light guide section toward the light exit surface side of the plate-shaped light guide section, and the second light guide section has a second light source. A lens cut is provided for directing light emitted from the light and guided through the second rod-shaped light guide to the light output region side of the second rod-shaped light guide.

  Thereby, a plurality of linear light is obtained from the plate-like light guide by the light emitted from the first light source, and the rod-like light is obtained from the second rod-like light guide by the light emitted from the second light source. As a result, linear light and rod-shaped light can be obtained from each of the plate-shaped light guide portion and the rod-shaped light guide portion by the emitted light with high luminance and little luminance unevenness.

It is sectional drawing when the vehicle lamp incorporating the lamp unit of embodiment which concerns on this invention is cut | disconnected in the horizontal surface in the state mounted in the vehicle. It is a front view of the lamp unit of the embodiment according to the present invention. It is AA sectional drawing of FIG. It is a BB partial sectional view of FIG. It is CC partial sectional drawing of FIG. FIG. 3 is a DD partial cross-sectional view of FIG. 2. It is a partial detail drawing of the LED light source vicinity which comprises a lamp unit. It is optical path explanatory drawing of a lamp unit. It is the front view which looked at the lamp unit through the opening of the extension. It is explanatory drawing of the light emission pattern obtained by the emitted light from the lamp unit integrated in the lamp arrange | positioned at the one side of a vehicle at the time of light source lighting. It is explanatory drawing of the light emission pattern obtained by the emitted light from the lamp unit integrated in the lamp arrange | positioned at the both sides of a vehicle at the time of light source lighting. It is explanatory drawing explaining the arrangement direction of the plate-shaped light guide part of the light guide which comprises a lamp unit. It is explanatory drawing which shows the positional relationship of the lens cut formed in a plate-shaped light guide part, and the lens cut formed in a 1st rod-shaped light guide. It is explanatory drawing of a prior art example.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 13 (the same parts are denoted by the same reference numerals). The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. Unless stated to the effect, the present invention is not limited to these embodiments.

  FIG. 1 is a cross-sectional view of a vehicular lamp incorporating a lamp unit according to an embodiment of the present invention cut along a horizontal plane in a state of being mounted on a vehicle.

  A vehicular lamp (hereinafter abbreviated as “lamp”) 50 includes a housing 51 made of an opaque resin and having one end opening, and an outer lens 52 made of a transparent resin and attached to the housing 51 so as to close the opening of the housing 51. The lamp chamber 53 is formed, and the lamp unit 1, the extension 54 made of an opaque resin, and the shielding plate 55 are accommodated in the lamp chamber 53.

  The extension 54 is located in front of the lamp unit 1 and partially hides a part of a light guide 2 described later that constitutes the lamp unit 1 in a front view. Further, the shielding plate 55 is located behind the lamp unit 1 and is hidden so that a housing 51 located on the back side cannot be seen through a light guide body 2 which will be described later constituting the lamp unit 1 in a front view. , Especially to improve the appearance during the daytime.

  Next, the lamp unit 1 housed in the lamp chamber 53 of the lamp 50 will be described in detail. 2 is a front view of a lamp unit according to an embodiment of the present invention, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, FIG. 4 is a partial cross-sectional view taken along line BB in FIG. FIG. 6 is a partial cross-sectional view of FIG. 2, and FIG. 7 is a partial detailed view of the vicinity of the LED light source constituting the lamp unit.

  Note that the lamp unit of the present embodiment is incorporated in a vehicle lamp and has a function as a front position lamp.

  The lamp unit 1 of the present invention is formed of a transparent material such as an acrylic resin, for example, and has two rod-shaped light guide portions (hereinafter referred to as “rod-shaped light guide portions”) 10 that extend in parallel with each other. 20 is a light guide 2 that is integrally connected by a single plate-like light guide (hereinafter referred to as “plate-like light guide”) 30, and two rod-like light guides 10, 20 is provided with LED light sources (hereinafter abbreviated as LEDs) 3 (3a, 3b) arranged in the vicinity of one end face.

  The plate-shaped light guide unit 30 is configured by a free curved surface that is convexly convex toward the front side, and is formed of two rods each including a first rod-shaped light guide unit 10 and a second rod-shaped light guide unit 20 at both edges thereof. Each of the light guides extends in a free curve along the free curved surface of the plate-like light guide 30.

  Of the two rod-shaped light guides of the first rod-shaped light guide 10 and the second rod-shaped light guide 20, the first rod-shaped light guide 10 on one side is the plate-shaped light guide 30 on the outer peripheral surface thereof. A lens cut 11 is applied to a region on the side opposite to the side from which the lens extends (the side opposite to the diameter direction of the first rod-shaped light guide). In the lens cut 11, a plurality of triangular prisms 11 a and V grooves 11 b extending along a direction substantially orthogonal to the extending direction of the first rod-shaped light guide unit 10 are arranged along the extending direction of the first rod-shaped light guide unit 10. It has a shape that is alternately arranged in parallel (see FIG. 4).

  The second rod-shaped light guide unit 20 on the other side is provided with a lens cut 21 in the rear side region of the outer peripheral surface thereof. In this lens cut 21, a plurality of triangular prisms 21 a and V grooves 21 b extending along a direction substantially orthogonal to the extending direction of the second rod-shaped light guide unit 20 are formed along the extending direction of the second rod-shaped light guide unit 20. It has a shape that is alternately arranged in parallel (see FIG. 5).

  The plate-shaped light guide section 30 is directed from the first rod-shaped light guide section 10 to the second rod-shaped light guide section 20 (or from the second rod-shaped light guide section 20 to the first rod-shaped light guide section 10) on the rear side surface. A plurality of lens cuts 31 are linearly formed with a predetermined width and interval. In this lens cut 31, a plurality of triangular prisms 31a and V-grooves 31b extending in a direction substantially orthogonal to the respective linear directions are alternately arranged along the linear direction of the lens cuts 31 for each lens cut 31. It has the shape arranged in parallel (refer FIG. 6). Further, although the plate-shaped light guide 30 and the first rod-shaped light guide 10 are integrally formed, for convenience, the boundary portion between the plate-shaped light guide 30 and the first rod-shaped light guide 10 is a plate. This is referred to as an incident portion 33 of the light guide 30.

  Therefore, as shown in FIG. 7, the light is emitted from the first LED 3 a disposed in the vicinity of one end surface of the first rod-shaped light guide unit 10 and is incident on the first rod-shaped light guide unit 10 from its one end surface (light incident surface) 13. As shown in FIG. 8, the light L1 is guided toward the opposite other end side while repeating internal reflection (total reflection) in the first rod-shaped light guide 10, and the lens cut 11 is in the middle of the light guide. A part of the light reaching the surface of the light is internally reflected toward the plate-shaped light guide 30, and the reflected light is guided through the first rod-shaped light guide 10, and is guided through the incident portion 33. The light enters the light unit 30.

  The light incident on the plate-shaped light guide 30 is guided toward the second rod-shaped light guide 20 facing the first rod-shaped light guide 10 while repeating internal reflection in the plate-shaped light guide 30. A part of the light reaching the surface of the lens cut 31 during the light guide is internally reflected toward the front surface (light emitting surface) 32 opposite to the surface on which the lens cut 31 is formed, and the reflected light is reflected. The light is guided through the plate-shaped light guide 30 and emitted from the light emitting surface 32 to the outside.

  In other words, the light emitted from the first LED 3a and sequentially guided through the first light guide 10 and the plate light guide 30 from the plate light guide 30 of the light guide 2 is the plate light guide. Reflected by a plurality of linear lens cuts 31 formed in the portion 30 and the reflected light is emitted as a plurality of linear lights.

  On the other hand, as shown in FIG. 7, the light is emitted from the second LED 3 b disposed in the vicinity of one end surface of the second rod-shaped light guide unit 20 and is incident on the second rod-shaped light guide unit 20 from its one end surface (light incident surface) 23. As shown in FIG. 8, the light L2 is guided in the second rod-shaped light guide portion 20 toward the opposite other end side while repeating internal reflection, and reaches the surface of the lens cut 21 in the middle of the light guide. A part of the reflected light is internally reflected toward the front region (light emitting region) 22 on the opposite side of the lens cut 21 (opposite to the diameter direction of the second rod-shaped light guide), and the reflected light is guided to the second rod-shaped guide. The light is guided through the light unit 20 and emitted from the light emitting region 22 to the outside.

  In other words, the light emitted from the second LED 3 b and guided through the second rod-shaped light guide 20 from the second rod-shaped light guide 20 of the light guide 2 is formed in the second rod-shaped light guide 20. Reflected by the lens cut 21 and the reflected light is emitted as rod-shaped light.

  Therefore, when the lamp unit when the first LED 3a and the second LED 3b are turned on is viewed from the front direction of the light guide 2, the rod-shaped light is viewed from the second rod-shaped light guide portion 20 of the light guide 2, and the plate-shaped light guide is obtained. A plurality of linear lights extending between the first rod-shaped light guide unit 10 and the second rod-shaped light guide unit are viewed from the unit 30.

  In this case, there is almost no light emitted directly from the first rod-shaped light guide unit 10, but if there is some light leakage, the light leakage may impair the appearance of the lamp unit. Therefore, when incorporated in the lamp 50, as shown in FIG. 9, a configuration in which the entire first light guide 10 and a part of the plate light guide 30 are hidden by an opaque extension 54 is adopted. From the opening 54a, the entire second light guide part 2 and most of the plate light guide part 30 are visible.

  As a result, when the LED light source is turned on, from the opening 54a of the extension 54, one bar-like light 25 extending in the diagonally vertical direction formed by the emitted light from the second bar-like light guide 20 as shown in FIG. Then, a plurality of linear lights 35 formed by the light emitted from the plate-like light guide 30 and extending substantially in the horizontal direction toward the rod-like light 25 are viewed. In other words, the observer cannot visually recognize the first rod-shaped light guide 10 that emits the rod-shaped light 25 of the plate-shaped light guide 30, so as if the rod-shaped light 25 emits light by itself. I can feel it.

  Note that, as described above, the lamp unit indicates the configuration of the lamp unit incorporated in the lamp on one side of the lamps (front position lamps) arranged on both sides of the vehicle. Therefore, as shown in FIG. 11, two second rod-like shapes located on both outer sides of the vehicle are obtained by incorporating a lamp unit having a configuration substantially symmetrical to the left and right lines with the lamp unit configured as described above into the lamp on the other side of the vehicle. Two rod-like lights 25 extending obliquely in the longitudinal direction on both outer sides of the vehicle, and two plates located inside the two second rod-like light guides 20, formed by light emitted from each of the light guides 20 A plurality of linear lights 35 that are formed by the light emitted from each of the light guides 30 and that extend between the two rod-like lights 25 in a substantially horizontal direction are viewed. As a result, it is possible to obtain a novel design display in accordance with the function of the front position lamp.

By the way, as shown in FIG. 12, the first rod-shaped light guide unit 10 is formed behind the second rod-shaped light guide unit 20, and the first rod-shaped light guide unit 10 to the second rod-shaped light guide unit 20. The extending direction of the plate-shaped light guide 30 toward the top is in contact with the central axis extending in the front-rear direction of the second rod-shaped light guide from obliquely rearward. Specifically, the extending direction of the plate-shaped light guide 30 is such that the angle α formed by the surface direction Y _α with respect to the substantially central axis X extending in the front-rear direction of the second rod-shaped light guide 20 is 90 ° or less. Is set to On the other hand, when the angle β formed by the surface direction Y _β of the plate-shaped light guide 30 with respect to the substantially central axis X of the second rod-shaped light guide 20 is set to an angle larger than 90 °, the second rod-shaped light guide 20 A part of the light guided inside and reflected by the lens cut 21 is directed toward the plate-shaped light guide 30, so that it does not contribute as light emitted from the second rod-shaped light guide 20.

Therefore, the angle α formed by the surface direction Y _α of the plate-shaped light guide 30 with respect to the substantially central axis X of the second rod-shaped light guide 20 is set to 90 ° or less, thereby guiding the inside of the second rod-shaped light guide 20. Thus, the light reflected by the lens cut 21 is prevented from traveling toward the plate-shaped light guide 30, and the emission efficiency of the light emitted from the second rod-shaped light guide 20 is increased.

  Further, the plurality of linear lens cuts 31 formed in the plate-shaped light guide unit 30 are directed obliquely with respect to the extending directions of the first rod-shaped light guide unit 10 and the second rod-shaped light guide unit 20, respectively. When the plate-shaped light guide unit 30 is viewed from the first rod-shaped light guide unit 10 side, a plurality of linear lens cuts 31 formed on the plate-shaped light guide unit 30 overlap each other and are continuously continuous. appear.

  Therefore, the light guided through the first light guide 10 and reflected by the lens cut 11 toward the light guide 30 is guided over the entire length of the first light guide 10. It reaches one of the lens cuts 31 in the portion 30 and effectively and efficiently contributes to the formation of linear light.

  On the other hand, when the plate-shaped light guide 30 is viewed from the first rod-shaped light guide 10 side, a plurality of linear lens cuts 31 formed on the plate-shaped light guide 30 overlap as shown in FIG. In the first rod-shaped light guide unit 10, the lens cut 11 is provided only in the vicinity region (M) corresponding to the lens cut 31 and the other region (N) is not provided with the lens cut. It is also possible.

  Thereby, the light which goes to the plate-shaped light guide part 30 from the 1st rod-shaped light guide part 10 can be partially concentrated on the part of the lens cut 31 of the plate-shaped light guide part 30, and by improvement of light utilization efficiency Bright linear light can be obtained.

  The lens cut 11 formed in the first rod-shaped light guide unit 10 is not necessarily limited to the combination cut of the triangular prism 11a and the V-groove 11b. For example, the lens cut 11 includes a plurality of cylindrical lenses having a substantially arc-shaped cross section. Any lens cut, such as a lens cut, that can efficiently direct the light guided through the first light guide 10 in the direction of the plate-shaped light guide plate 30 may be used.

  Further, the lens cut 21 formed in the second rod-shaped light guide unit 20 is not necessarily limited to the combination cut of the triangular prism 21a and the V-groove 21b, and includes, for example, a plurality of cylindrical lenses having a substantially arc-shaped cross section. Any lens cut, such as a lens cut, may be used as long as the light guided through the second rod-shaped light guide unit 20 can be efficiently directed toward the light emitting region 22 of the second rod-shaped light guide unit 20.

  Further, the linear lens cut 31 formed in the plate-like light guide 30 is not necessarily limited to the combination cut of the triangular prism 31a and the V-groove 31b. For example, a plurality of cylindrical tubes having a substantially arc-shaped cross section. It is possible to efficiently direct the light guided in the plate-shaped light guide 30 through the first rod-shaped light guide 10 such as a lens cut made of a lens toward the light emitting surface 32 of the plate-shaped light guide 30. Any lens cut can be used.

  The lens cuts 11, 21, and 31 can also be subjected to fine graining on the surface. Thereby, the uniformity of the luminance distribution can be achieved by the diffusion of the light by the embossed surface with respect to the internally reflected light by the lens cut surface.

  In particular, the lens cut 31 of the plate-like light guide 30 may be formed by embossing the lens cut itself. Thereby, linear light with little luminance unevenness can be obtained from the plate-shaped light guide 30.

  As described above, the lamp unit of the present invention incorporated in the lamp has a plate-like light emitted from the first LED 3a of the light source and guided through the first rod-shaped light guide 10 to the first rod-shaped light guide 10. A plurality of lens cuts 11 directed toward the light guide unit 30 are provided, and the light guided from the first rod-shaped light guide unit 10 is directed to the light guide surface 30 side of the plate light guide unit 30. The linear lens cut 31 is provided, and the light emitted from the second LED 3b of the light source and guided through the second rod-shaped light guide 20 to the second rod-shaped light guide 20 is supplied to the second rod-shaped light guide 20. A lens cut 21 directed toward the light exit surface region 22 is provided.

  Thereby, a plurality of linear light is formed by the light emitted from the first LED 3a, guided through the first light guide portion 10 through the plate light guide portion 30, and emitted from the plate light guide portion 30, Bar light is formed by light emitted from the second LED 3 b and guided through the second bar light guide 20 and emitted from the second bar light guide 20. As a result, linear light and rod-shaped light can be obtained from each of the plate-shaped light guide unit 30 and the second rod-shaped light guide unit 20 by emitted light with high luminance and little luminance unevenness.

  In addition, you may comprise the plate-shaped light guide part 30 with a plane other than the said free-form surface. Similarly, each of the 1st rod-shaped light guide part 10 and the 2nd rod-shaped light guide part 20 extended to the both edge parts of the plate-shaped light guide part 30 may be comprised with a straight line other than the said free curve. Further, the lens cut 31 formed in the plate-like light guide 30 can be freely set with specifications such as width, interval, and shape.

  Thereby, a light output pattern with a high degree of design freedom can be obtained from each of the plate-like light guide 30, the first rod-like light guide 10, and the second rod-like light guide 20.

  The lamp unit of the present invention can be used not only as a front position lamp described in the embodiment but also as a rear combination lamp, a turn signal lamp, and the like. In other words, it is a lamp unit that can be incorporated in both the front and rear of the vehicle as a use application. Therefore, the terms indicating the direction such as “front”, “rear”, “left / right”, etc. used in the above description are “front” in the light projection direction of the light emitted from the lamp unit, and the light is projected. The rear side of the direction should be interpreted as “rear” and the left and right sides of the light projection direction as “left and right”. In other words, when used as a lamp incorporated in the front side of the vehicle such as a front position lamp, “front”, “rear”, “left and right” are respectively “vehicle front direction”, “vehicle rear direction”, “ It means “vehicle width direction”. In addition, when used as a lamp incorporated in the rear side of a vehicle such as a rear combination lamp, “front”, “rear”, and “left and right” are respectively “vehicle rear direction”, “vehicle front direction”, “vehicle width” Means "direction".

DESCRIPTION OF SYMBOLS 1 ... Lamp unit 2 ... Light guide 3 ... LED light source 3a ... 1st LED (1st light source)
3b ... 2nd LED (2nd light source)
DESCRIPTION OF SYMBOLS 10 ... 1st rod-shaped light guide part 11 ... (1st) Lens cut 11a ... Triangular prism 11b ... V-groove 13 ... One end surface (light incident surface)
20 ... 2nd rod-shaped light guide part 21 ... (2nd) Lens cut 21a ... Triangular prism 21b ... V-groove 22 ... Front surface area (bar-shaped emission surface)
23 ... One end surface (light incident surface)
25 ... Rod-shaped light 30 ... Plate-shaped light guide 31 ... (Third) lens cut 31a ... Triangular prism 31b ... V-groove 32 ... Front (planar exit surface)
33 ... Incident part 35 ... Linear light 50 ... Vehicle lamp 51 ... Housing 52 ... Outer lens 53 ... Lamp chamber 54 ... Extension 54a ... Opening 55 ... Shielding plate

Claims (5)

A light guide including a first rod-shaped light guide, a second rod-shaped light guide, and a plate-shaped light guide integrally connecting the two rod-shaped light guides;
A first light source disposed in the vicinity of an end surface of the first rod-shaped light guide;
A lamp unit used in a vehicular lamp including a second light source disposed in the vicinity of an end surface of the second rod-shaped light guide unit,
The first rod-shaped light guide includes a first lens cut,
The second rod-shaped light guide unit includes a second lens cut and a rod-shaped emission surface,
The plate-like light guide part includes a third lens cut, an incident part formed on an edge, and a planar emission surface,
The first lens cut reflects the light emitted from the first light source toward the incident part of the plate-shaped light guide part,
The second lens cut reflects the light emitted from the second light source toward the rod-shaped emission surface,
The plate-shaped light guide unit reflects light from the first rod-shaped light guide unit toward the planar light exit surface.   The lamp unit according to claim 1, wherein the second lens cut and the third lens cut are formed on substantially the same side of the light guide. The first lens cut and the second lens cut are formed along the longitudinal direction of the first rod-shaped light guide and the second rod-shaped light guide, respectively.
The said 3rd lens cut is formed so that it may extend toward the said 2nd rod-shaped light guide part from the said 1st rod-shaped light guide part, Either of Claim 1 or Claim 2 characterized by the above-mentioned. Lamp unit. Further equipped with an extension,
The entire area of the first rod-shaped light guide is covered so as not to be visually recognized by the extension,
The lamp unit according to any one of claims 1 to 3, wherein at least a part of the second rod-shaped light guide and the plate-shaped light guide is not covered with the extension. The first rod-shaped light guide is formed behind the second rod-shaped light guide,
The extending direction of the plate-shaped light guide portion from the first rod-shaped light guide portion to the second rod-shaped light guide portion is obliquely rearward with respect to the central axis extending in the front-rear direction of the second rod-shaped light guide portion. The lamp unit according to claim 1, wherein the lamp unit is in contact with the lamp unit.