JP2020095782A - Vehicular lighting fixture - Google Patents

Abstract

To provide a vehicular lighting fixture including a light guide which can be installed in a limited space, which emits incident light uniformly and which prevents wiring and the like positioned at the back being visible from the outside during light emission.SOLUTION: A vehicular lighting fixture (100) includes: a light source part (24) for emitting light; a cylindrical light pipe part (20) which extends in a first direction, and in which the light from the light source part (24) enters from one end and which waveguides the light inside; a light guide part (10) which has a tabular light path part (13) extending in a second direction crossing the first direction, in which light enters the light path part (13) from the light pipe part (20) and which emits the light from an emission end surface (11) of the light path part (13); and a light shielding part (15) for shielding light, formed on a guide surface (14) crossing the emission end surface (11) in the light path part (13).SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicular lamp including a light guide.

2. Description of the Related Art In recent years, vehicular lamps using a light emitting element such as a light emitting diode (LED: Light Emitting Diode) as a light source have become widespread. Among such vehicular lamps, in a sideways light, a stop light (brake lamp), etc., as shown in Patent Document 1, a light pipe or the like is used to guide the light of a light emitting diode to emit the light at a predetermined position. What is emitted is used. The light pipe is a columnar light guide member, and is provided with a diffusing section in which a plurality of steps are formed. The diffusing section is used to uniformly diffuse the incident light into the light pipe, and the light is emitted from the emitting section. It is a mechanism to emit.

FIG. 16 is a schematic cross-sectional view showing a conventional vehicle lamp 500. Each member which comprises the inside of the lamp 500 is typically shown. As shown in FIG. 16, in the configuration using the light pipe 501, a base 502 is provided on the back surface for fixing the light pipe 501, and an inner portion for emitting light from the light pipe 501 emitting portion in a predetermined direction. The lens 503 and the like were provided. Further, in the lamp 500, a plurality of lights are provided in the lamp body (lamp room), and the lights are properly used according to the application. For example, a unit 504 such as an accessory lamp may be provided separately. Further, wiring for supplying electric power to a plurality of lights is also laid out.

On the other hand, the front (light emitting surface) of the lamp 500 is made of a transparent cover or the like so that the inside of the lamp can be seen from the outside. Therefore, the extension 505 is provided as a partition so that unnecessary things such as wiring in the lamp chamber cannot be seen. The vehicular lamp 500 needs a plurality of members for emitting the light of the light source to the outside, and also needs an extension or the like in order to improve the appearance such as hiding the internal wiring. Is coming. In order to arrange these various members, some internal space is required.

On the other hand, in order to reduce restrictions on the location of the lamp in the vehicle, it is required to downsize the lamp. In addition to saving space inside the lamp, it is required to have the same or better function than before saving space and to have a good external appearance. Further, from the viewpoint of manufacturing, it is also required to reduce the number of parts to make the assembling work efficient.

JP, 2017-195134, A

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and is a light that can be installed in a limited space and that uniformly emits incident light and prevents wirings located in the surroundings from being seen from the outside. An object of the present invention is to provide a vehicular lamp equipped with a guide.

In order to solve the above-mentioned problems, a vehicular lamp of the present invention includes a light source unit that emits light and a light source unit that extends in a first direction and is incident from one end with light from the light source unit. Has a cylindrical light pipe section and a plate-shaped optical path section extending in a second direction intersecting the first direction, and light is incident on the optical path section from the light pipe section and from the exit end surface of the optical path section. It is characterized in that a light-shielding portion that shields light is formed on a light guide portion that emits light and a guide surface that intersects the emission end surface in the optical path portion.

Further, according to one embodiment of the present invention, the light-shielding portion includes a reflective film formed on the guide surface and a light-shielding film formed on the reflective film.

Further, according to one aspect of the present invention, the light-shielding portion is provided at a predetermined distance from the emission end face.

Further, according to one aspect of the present invention, the light shielding portion is formed on two guide surfaces facing each other.

Further, according to an aspect of the present invention, the light pipe portion and the light guide portion are integrally formed.

Further, according to an aspect of the present invention, the optical path portion includes a first plate portion extending from the emission end face and a first bent portion bent at a predetermined angle with respect to the first plate portion.

Further, according to one aspect of the present invention, the light-shielding portion is formed only on the first plate portion.

Further, according to an aspect of the present invention, the light shielding portion is formed from the first plate portion to the first bent portion.

Further, according to an aspect of the present invention, the optical path portion includes a second plate portion extending from the first bent portion and a second bent portion bent at a predetermined angle with respect to the second plate portion.

Further, according to an aspect of the present invention, the predetermined angle is an angle at which the light guided in the optical path portion is totally reflected by the guide surface.

According to the present invention, there is provided a vehicle lamp including a light guide that can be installed in a limited space, that sufficiently guides incident light and uniformly emits the incident light, and that prevents wirings located in the surroundings from being seen from the outside. Can be provided.

FIG. 1 is a schematic cross-sectional view showing a vehicular lamp 100 according to a first embodiment. FIG. 2 is a schematic perspective view showing a light guide portion 10 and a light pipe portion 20 in FIG. 1, FIG. 1A is a schematic front perspective view seen from the light guide portion 10 side, and FIG. It is a typical rear perspective view seen from the pipe part 20 side. It is a schematic top view which shows the light guide part 10, (a) of the figure is a schematic top view of the light guide part 10, and (b) of the same figure is enclosed by the two-dot chain line of the same figure (a). It is a partial top view which expanded the exit end surface 11 vicinity. FIG. 3 is a schematic top view showing the light shielding unit 15 of the first embodiment. FIG. 3 is a schematic cross-sectional view of the light pipe section 20 of FIG. 2 taken along the direction A. It is a typical partial perspective view which expanded the reflection step part 23 part of the light pipe part 20. It is a schematic cross section which shows the vehicle lamp 100 in 2nd Embodiment. FIG. 8 is a schematic perspective view showing a light guide portion 10 and a light pipe portion 20 in FIG. 7. It is a schematic diagram which shows the reflection of the light in the light guide part 10 in FIG. 7, The figure (a) shows the reflection of the light when the light shielding part 15 is not formed in the 1st bending part 13c. (B) shows the reflection of light when the light shielding portion 15 is formed on the first bent portion 13c. It is a schematic perspective view which shows the light guide part 10 and the light pipe part 20 of 3rd Embodiment. FIG. 11 is a schematic top view showing the light guide portion 10 and the light pipe portion 20 of FIG. 10. It is a schematic top view which shows the light guide part 10 and the light pipe part 20 which are the modification 1 of 3rd Embodiment, and the same figure (a) is a schematic top view which shows the modification 1-1, FIG. 6B is a schematic top view showing the modified example 1-2. It is a schematic top view which shows the light guide part 10 and the light pipe part 20 which are the modification 2 of 3rd Embodiment, and the same figure (a) is a schematic top view which shows the modification 2-1. FIG. 6B is a schematic top view showing Modified Example 2-2. It is a schematic top view which shows the light guide part 10 and the light pipe part 20 which are the modification 3 of 3rd Embodiment. FIG. 15 is a schematic cross-sectional view showing a vehicle lamp 100 including the light guide portion 10 and the light pipe portion 20 of FIG. 14. FIG. 11 is a schematic cross-sectional view showing a conventional vehicle lamp 500.

(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or equivalent constituent elements, members, and processes shown in each drawing will be denoted by the same reference numerals, and duplicated description will be appropriately omitted. The vehicular lamp 100 according to the present embodiment is used as a width lamp, a DRL (Daytime Running Lamp), a tail lamp, a stop lamp, etc., which are mounted on the left and right of the vehicle.

FIG. 1 is a schematic cross-sectional view showing a vehicle lamp 100 according to this embodiment. FIG. 2 is a schematic perspective view showing the light guide portion 10 and the light pipe portion 20 in FIG. 1, and FIG. 2A is a schematic front perspective view seen from the light guide portion 10 side. b) is a schematic rear perspective view seen from the light pipe section 20 side. FIG. 3 is a schematic top view showing the light guide portion 10. FIG. 3A is a schematic top view of the light guide portion 10, and FIG. 3B is a broken line in FIG. It is the partial top view which expanded the vicinity of the enclosed emission end surface 11.

As shown in FIGS. 1 to 3, a vehicular lamp 100 includes a light guide 1 having a light guide portion 10 and a light pipe portion 20 in a lamp chamber surrounded by a lamp body 33a and a transparent cover 33b, and a unit portion. 30, a first extension 31, and a second extension 32 are provided. Light from a light source (not shown) is emitted to the outside of the vehicular lamp 100 through the cover 33b.

As described above, the light guide 1 includes two parts, the light pipe section 20 having a portion where light is incident from the light source and the light guide section 10 that guides the incident light to a predetermined location. In the present embodiment, the light pipe portion 20 and the light guide portion 10 are integrally molded, but in the present embodiment, the light guide 1 will be described separately for the light guide portion 10 and the light pipe portion 20. Further, the light guide 1 in the present invention is not limited to the integrated type as long as it can guide light, and may be a separate structure, or may be manufactured separately and integrated by adhesion or the like. Good.

The light guide unit 10 is a plate-shaped member made of a transparent resin such as acrylic or polycarbonate. The light guide unit 10 opposes the incident region 12 in which the light from the light pipe unit 20 is incident, the optical path unit 13 that guides the light incident from the incident region 12 inside the light guide unit 10, and the incident region 12. An emission end face 11 that is an end face and emits light in the optical path portion 13 and a guide surface 14 that intersects the emission end face 11 and that forms the optical path portion 13 are provided. Further, on the guide surface 14, a light shielding portion 15 described later is provided.

As described above, the light guide portion 10 is a plate-shaped portion extending from the light pipe portion 20, and the guide surface 14 is formed so as to connect the emission end face 11 and the incident region 12 in the A direction (second direction) in the drawing. An optical path portion 13 is formed extending.

The emission end surface 11 is a surface for emitting the light guided from the light pipe portion 20 through the inside of the optical path portion 13 to the outside of the light guide portion 10.

The incident area 12 is an area where light is incident from the light pipe section 20 to the optical path section 13. In the present embodiment, although it is a portion continuous from the light pipe portion 20, for convenience, the region connected to the optical path portion 13 will be referred to as the incident region 12.

The optical path portion 13 is a main body portion of the light guide portion 10 and guides incident light to the emission end surface 11. Light is guided in the A direction in the optical path portion 13. Then, the optical path portion 13 forms the guide surfaces 14 on the left and right so as to face each other in the B direction intersecting the A direction. In the present embodiment, the B direction is orthogonal to the A direction on the XY plane.

The guide surface 14 is a side surface of the optical path portion 13, and intersects the emission end surface 11 and the incident area 12.

As described above, the light guide portion 10 is formed of a transparent resin, and light can be transmitted from one guide surface 14 of the plate-shaped light guide portion 10 to the other guide surface 14. Therefore, if the light shielding portion 15 is not provided, various members behind the other guide surface 14 will be seen through the one guide surface 14.

The light-shielding portion 15 is provided in order to prevent an object behind the guide surface 14 from seeing through, and in the present embodiment, the light-shielding portion 15 is provided so as to cover the guide surface 14. The light-shielding portion 15 has at least a light-shielding light-shielding film. The light-shielding film is formed on the guide surface 14 by applying a light-shielding coating material, vapor deposition, or the like.

FIG. 4 is a schematic top view showing the light shielding unit 15 of this embodiment.

The light shielding unit 15 of the present embodiment includes a reflection film 15a formed on the guide surface 14 and a light shielding film 15b formed on the reflection film 15a. The reflection film 15a has a function of internally reflecting the light reaching the guide surface 14. Specifically, the reflective film 15a is formed by coating, vapor-depositing, or the like on the guide surface 14 a paint of a color that is easily reflected, such as white or silver. The light shielding portion 15 further includes a light shielding film 15b on the upper surface of the reflection film 15a. The light-shielding film 15b is for shielding external light (prevents external light from passing through the inside of the light guide portion 10), and coats or vapor-deposits black paint on the reflective film 15a. Is formed.

Although the reflective film 15a and the light-shielding film 15b have a two-layer structure in the present embodiment, the light-shielding film 15b may have a single-layer structure as described above. In this case, the light-shielding film 15b may be thickly coated with white paint. By doing so, it can also serve as the reflection film 15a. Further, the light shielding film 15b having a color matching the color tone inside the vehicle lamp 100 may be used.

Further, as shown in FIG. 3B, the light shielding portion 15 is provided at a predetermined distance t (about several mm) from the emitting end face 11. That is, when forming the light shielding portion 15 on the guide surface 14, the light shielding portion 15 is not formed up to the corner portion 11a between the emitting end surface 11 and the guide surface 14, but only the distance t from the corner portion 11a to the guide surface 14 side. The end of the light shielding part 15 should come. Specifically, when forming the reflective film 15a and the light-shielding film 15b, masking is performed by the distance t between the emitting end face 11 and the corner portion 11a so that the paint does not adhere to the corner portion 11a and the emitting end face 11.

When the coating is applied or vapor-deposited without masking only the emitting end face 11 and without masking the corner portion 11a, the coating material may wrap around the emitting end face 11 from the corner portion 11a. A part of the emission end face 11 is shielded by the wrap-around paint, and the light emission area of the emission end face 11 is reduced. In the present embodiment, in order to prevent such a decrease in the emission area of the emission end face 11, the light shielding portion 15 is provided at a predetermined distance t from the emission end face to secure the maximum emission area. Details of the operation of the light shielding unit 15 will be described later.

In the present embodiment, the light-shielding portions 15 are provided on both sides of the guide surface 14 that face each other. However, the present invention is not limited to this, and a guide in a direction in which it is difficult to see what is around the guide surface 14 is transparent. The light shielding portion 15 may be provided only on the surface 14 and the light shielding portion 15 may not be provided on the other guide surface 14.

Next, the light pipe section 20 that causes the light from the light source section 24 to enter the light guide section 10 will be described. As shown in FIGS. 1 and 2, the light pipe portion 20 is a tubular member extending in the C direction (first direction) that intersects the A direction, and has a substantially cylindrical shape in the present embodiment. Like the light guide portion 10, it is made of a transparent resin such as acrylic or polycarbonate.

The length of the light pipe portion 20 in the C direction is substantially the same as the length of the light guide portion 10 in the same direction, and almost all the light that has entered the light pipe portion 20 is guided to the light guide portion 10. Becomes The incident surface 21 is provided at one end of the light pipe section 20 in the C direction, and the light of the light source section 24 is irradiated to the incident surface 21.

FIG. 5 is a schematic cross-sectional view of the light pipe portion 20 of FIG. 2 taken along the direction A. FIG. 6 is an enlarged schematic partial perspective view of the reflection step portion 23 portion of the light pipe portion 20.

As shown in FIGS. 5 and 6, the reflection step portion 23 is continuously formed in the C direction from one end to the other end of the light pipe portion 20. The reflection step portion 23 is formed by a plurality of steps 23c formed by a combination of a reflection surface 23a inclined toward the inside of the light pipe portion 20 and a step surface 23b rising from the reflection surface 23a. The reflecting surface 23 a is provided to reflect the light from the light source section 24 into the light pipe section 20, and the incident light is totally reflected by the reflecting surface 23 a and enters the inside of the light pipe section 10. Then, the light is guided toward the incident region 12 of the light guide unit 10.

The light source section 24 is located so as to face the incident surface 21 in the extending direction of the light pipe section 20, that is, in the C direction. The light source unit 23 emits light toward the incident surface 21. The light source section 24 of the present embodiment may be formed of LEDs or the like.

When the light from the light source 24 enters the incident surface 21 of the light pipe section 20, it is emitted to the light guide section 10 via the inside of the light pipe section 20 by the plurality of reflecting surfaces 23a of the reflection step section 23 and the like. The light emitted to the light guide portion 10 is guided in the optical path portion 13 inside the light guide portion 10 and is emitted from the emission end face 11.

The light guided through the light pipe portion 20 is repeatedly bright and dark in the C direction according to the formation interval of the reflection surface 23a of the reflection step portion 23 of the light pipe portion 20. Therefore, the light emitted from the emission end surface 11 of the light guide unit 10 is also light that has been repeatedly bright and dark.

Next, members other than the light guide portion 10 and the light pipe portion 20 in the vehicle lamp 100 will be described. As shown in FIG. 1, the unit section 30 is a lamp unit that realizes functions such as a headlight, a stop lamp, and an accessory light, and emits predetermined light from an emission surface that is arcuate in the figure. Is.

The first extension 31 is arranged in front of the wiring and the like in the vicinity of the unit section 30 and plays a role of a partition so as to prevent unnecessary things such as the internal wiring from being seen from the outside. The second extension 32 is located on the back surface of the light pipe section 20, and in order to prevent the wiring and the like in the back direction of the light pipe section 20 from being seen through the light pipe section 20, the second extension 32 and the wiring It is located between and and acts as a partition. The first extension 31 and the second extension 32 may be integrally formed with the body 33a, or may be separately formed and assembled. Further, these are formed of resin, metal or the like. The body 33a and the cover 33b form the outer shape of the vehicular lamp 100, and have a structure in which the transparent cover 33b is located in front of the emission direction.

When the light source and the emission surface of the lamp 100 are separated from each other as in the vehicle lamp 100 of the present embodiment, the light guide portion 10 that guides the light of the light source to the emission surface is required. Since the light guide portion 10 is transparent as described above, the wiring and the like around the light guide portion 10 penetrate the light guide portion 10 and are visible through the light guide portion 10. Conventionally, although it is difficult to see, such an extension is provided separately in order to make it invisible from the outside of the lamp 100, and a space for the extension is additionally required inside the lamp 100. In addition, the larger the light guide section 10, that is, the greater the distance from the light source to the emission surface, the wider the range protected by the extension and the larger the extension. As described above, there are cases where the extension cannot be provided because the space inside the lamp 100 is limited.

However, as described above, in the present embodiment, since the light shielding portion 15 is provided on the guide surface 14 of the light guide portion 10, the wiring or the like located on the opposite side through the light guide portion 10 can be seen through the light guide portion 14. There is no such thing. That is, since the light shielding portion 15 serves as an extension, it is not necessary to separately provide an extension. Further, since the light that has entered the light pipe section 20 from the light source section 24 is emitted in a predetermined direction from the emission end surface 11 via the optical path section 13 of the light guide section 10, an accessory member such as an inner lens is unnecessary.

As described above, the light-shielding portion 15 functions as an extension, so that a member such as an extension that is conventionally provided is unnecessary. In addition, since the space for the extension is not necessary, the space inside the lamp chamber can be saved. Since the number of parts is reduced in this manner, the degree of freedom in the space design inside the vehicle lamp 100 is increased, and the vehicle lamp 100 that is smaller than the conventional one can be provided.

(Second embodiment)
In the first embodiment, the light guide unit 10 has a straight plate shape from the incident region 12 to the emitting end face 11. In this embodiment, a form in which a part of the optical path portion 13 is bent will be described. In the present embodiment, a form in which a part of the light guide portion 10 is bent is described in order to increase the degree of freedom in design such as miniaturization of the vehicle lamp 100.

FIG. 7 is a schematic cross-sectional view showing the vehicular lamp 100 according to this embodiment. FIG. 8 is a schematic perspective view showing the light guide portion 10 and the light pipe portion 20 in FIG. 7. FIG. 9 is a schematic diagram showing the reflection of light inside the light guide portion 10 in FIG. 7, and FIG. 9A shows the reflection of light when the light shielding portion 15 is not formed in the first bent portion 13c. The same figure (b) shows the reflection of light when the light shielding portion 15 is formed on the first bent portion 13c.

As shown in FIGS. 7 and 8, the light guide portion 10 of this embodiment has a shape in which a part of the optical path portion 13 is bent and two flat plates are continuous at a predetermined angle. Specifically, the optical path portion 13 includes a first plate portion 13a extending from the emitting end surface 11, a first bent portion 13c and a first bent portion 13c which are corners bent at a predetermined angle with respect to the first plate portion 13a. The second plate portion 13b extending to the incident area 12 is provided. The first bent portion 13c has an angle such that the light guided in the optical path portion 13 is totally reflected by the guide surface 14. For example, the angle β in FIG. 9 is 45 degrees.

The light shielding portion 15 in the present embodiment is not provided on almost the entire guide surface 14, but is provided only on the guide surface 14 of the first plate portion 13a. Then, as shown in FIGS. 8 and 9A, the first bent portion 13 c is not shielded by the light shielding portion 15. That is, the light shielding film 15b is formed by masking the first bent portion 13c so that the end portion is located in front of the first bent portion 13c.

As shown in FIG. 9A, the light α1 that has traveled through the second plate portion 13b is reflected by the first bent portion 13c, but since the light shielding portion 15 is not formed in this portion, the reflected light α2 is Totally reflects. Therefore, when the emitted light is seen facing the emission end face 11, the point-like light with the light and dark according to the interval of the step 23a of the reflection step portion 23 of the light pipe portion 20 can be seen.

FIG. 9B is a schematic diagram showing the reflection of light in the light guide portion 10 in which the light shielding portion 15 which is a modified example of the present embodiment is provided up to the first bent portion 13c.

As a modified example, as shown in FIG. 9B, the light shielding portion 15 may be formed on the guide surface 14 of the first plate portion 13a and the first bent portion 13c. As described above, when the first bent portion 13c is also covered with the light shielding film 15b, the light α1 that has traveled through the second plate portion 13b has the light shielding portion 15 formed in the first bent portion 13c. It is scattered and reflected by the first bent portion 13c. Therefore, the reflected light α2 is not diffused light as in the case where the first bent portion 13c is not shielded, but is diffused light having a spread. Therefore, the light emitted from the emission end face 11 becomes diffused light having a spread like the light of a fluorescent lamp.

Further, the light shielding portion 15 may be formed in almost the entire first plate portion 13a and the second plate portion 13b. In addition, as described in the first embodiment, in order to prevent the paint from wrapping around the emission end face 11, the corner portion 11a of the emission end face 11 is not coated with the paint.

In this way, by bending a part of the light guide portion 10, it is possible to reduce restrictions on the arrangement and increase the degree of freedom in designing the vehicle lighting device 100. Further, depending on the characteristics of the light to be emitted, it is possible to adjust whether the corner 13c of the bend is shielded by the light shielding portion 15, and to use sharp light, diffused light with spread, and emitted light.

In addition, in the present embodiment, the shape in which the first bending portion 13c is bent once is described, but the present invention is not limited to one time, and a plurality of times is performed depending on the internal space of the lamp 100 and the position of the light source. It may be bent. The bending angle of the bent portion is preferably an angle for total reflection, but is not limited to total reflection, and may be appropriately designed according to the internal space.

Further, in both the first embodiment and the second embodiment, the light pipe portion 20 has been described as having a columnar shape (straight line shape), but the light pipe portion 20 in the present invention is not limited to the columnar shape, and extends by bending. It may be what you are doing. When the light pipe portion 20 is bent and extends, the light guide portion 10 is also bent in accordance with the bending of the light pipe portion 20. Further, the emission end face 11 is not limited to one that extends straight in the direction of the arrow C, but is appropriately curved depending on the arrangement of the light to be emitted, that is, the lighting shape that the various lights are desired to display when viewed from the outside of the vehicle. Good.

By bending and bending the light pipe portion 20 and the light guide portion 10 in this way, the optical path can be designed without being restricted by the installation location in the lamp chamber, and the degree of freedom in design is improved. Further, the degree of freedom in designing the lighting shape to be displayed is improved.

(Third Embodiment)
FIG. 10 is a schematic perspective view showing the light guide portion 10 and the light pipe portion 20 of the third embodiment. The light guide portion 10 in this embodiment is not joined to the light pipe portion 20 and is a separate body. FIG. 11 is a schematic top view showing the light guide portion 10 and the light pipe portion 20 of FIG.

In the present embodiment, in the incident area 12 joined to the light pipe portion 20, the light of the light pipe portion 20 is widely ensured, and the light guide portion 10 is provided with the light so as to provide a degree of freedom of the arrangement position in the lamp chamber. It has a separate structure from the pipe portion 20. In addition, a U-shaped receiving portion 16 having one end opened is provided at the tip of the incident region 12, and the light pipe portion 20 is positioned by the receiving portion 16.

The receiving portion 16 has a shape in which a part of the cylinder is open and covers the entire cylindrical light pipe portion 20. The light from the light pipe section 20 is reflected and diffused in the receiving section 16 and guided to the optical path section 13. The receiving portion 16 is connected to the optical path portion 13 at the neck portion 17.

The neck portion 17 is a portion formed from the back surface of the receiving portion 16 to have the same width as the width of the optical path portion 13. The end of the neck portion 17 becomes the incident area 12, and the position of the rear surface of the receiving portion 16 of the incident area 12 is appropriately adjusted according to the direction of light guiding from the receiving portion 16 and the situation of the installation space. The neck portion 17 is a part of the optical path portion 13 and corresponds to the second plate portion 13b of the second embodiment, but in the present embodiment, it is referred to as the neck portion 17 for convenience.

The following optical path portion 13 extends in a form of a first bent portion 13c bent at a predetermined angle with the neck portion 17. The bending angle β of the first bent portion 13 is an angle at which light is totally reflected, and is, for example, 45 degrees. The other end of the optical path portion 13 is an emission end face 11, and light is emitted from this emission end face 11.

The light-shielding portion 15 of the present embodiment may be formed over the entire surface of the receiving portion 16 to the neck portion 17 and the guide surface 14, or, as shown in the second embodiment, from the vicinity of the emitting end surface 11 to the first bend. It may be up to the portion 13.

Here, since the receiving portion 16 covers the periphery of the light pipe portion 20, it is possible to collect not only the light from the facing surface 22 as in the first embodiment but also the light from each direction. Ability is improved. Further, by providing the receiving portion 16, the degree of freedom of the position of the neck portion 17 is increased, and the degree of freedom of design according to the restriction of the internal space of the vehicular lamp 100 is also improved.

(Modification 1-1)
FIG. 12 is a schematic top view showing a light guide portion 10 and a light pipe portion 20 which are Modification 1 of the third embodiment, and FIG. 12A is a schematic top view showing Modification 1-1. FIG. 7B is a schematic top view showing Modification 1-2.

In the modified example 1-1, the joint range between the neck portion 17 and the receiving portion 16 is widened, the neck portion 17 is provided with a thick portion, and the thick portion serves to collect light. By widening the joining range with the neck portion 17, the light received by the receiving portion 16 can be guided to the neck portion 17 in a wider range, and the light can be reflected by the thick portion and condensed to direct the light to the optical path portion 13. Can be guided.

(Modification 1-2)
In the modified example 1-2, a V-shaped space 17b is provided by cutting the inside of the thickened neck portion 17 into a V-shape. Light is also reflected in this V-shaped space, and the structure is such that light is collected at the V-shaped tip. Therefore, similarly to the first modification, the light received by the receiving portion 16 can be secured in a wide range and can be condensed at the V-shaped tip, so that the light can be condensed from a wide range and guided to the optical path portion 13. You can

(Modification 2-1)
FIG. 13 is a schematic top view showing a light guide portion 10 and a light pipe portion 20 which are Modification 2 of the third embodiment, and FIG. 13A is a schematic top view showing Modification 2-1. FIG. 7B is a schematic top view showing Modification 2-2.

In the modified example 2-1, the convex portion 16a is provided at a position facing the neck portion 17 on the inner side surface of the receiving portion 16 facing the light pipe portion 20.

The convex portion 16a is a semicylindrical projection that forms an arc toward the inside of the receiving portion 16. By providing such a convex portion 16a, the convex portion 16a has a structure in which light is reflected in a complicated manner at the convex portion 16a and the light is concentrated on the neck portion 17.

(Modification 2-2)
Although the modification 2-1 shows an example in which the receiving portion 16 is provided with only one convex portion 16a, in the present modification, the streak convex portion 16b in which a plurality of convex portions are arranged is provided. The streak-like convex portion 16b has a plurality of convex and concave portions linearly repeated at a position facing the neck portion 17 on the inner surface of the receiving portion 16 facing the light pipe portion 20. In other words, a plurality of small arcuate, semi-cylindrical projections are arranged.

By providing such streak-shaped protrusions 16b, light is reflected in a more complicated manner by the streak-shaped protrusions 16b, and the light is collected at the neck portion 17.

(Modification 3)
FIG. 14 is a schematic top view showing a light guide portion 10 and a light pipe portion 20 which are Modification Example 3 of the third embodiment. FIG. 15 is a schematic cross-sectional view showing a vehicle lamp 100 including the light guide portion 10 and the light pipe portion 20 of FIG.

The neck portion 17 of this modification has a structure in which it is bent twice. By bending the neck 17 twice, the light is totally reflected at the two bent portions and is guided to the optical path portion 13.

As described above, when the installation space of the light guide portion 10 is limited and the positional relationship between the light pipe portion 10 and the light guide portion 10 is limited, the neck portion 17 is bent multiple times in accordance with the limited space. It is also possible to configure it. The bending angle of the bent portion is preferably an angle at which light can be totally reflected, for example, about 42 to 45 degrees. By setting the angle at which total reflection can be performed in this way, it is possible to emit approximately the incident light.

As described above, by providing the receiving portion 16 and the neck portion 17, variation in the light collecting path is caused, and by appropriately arranging according to the installation space, more light can be collected in the light guide portion 10. Therefore, the light can be emitted in a desired emission direction. Therefore, even if the emission position is far from the light source, the light from the light source can be guided to a predetermined emission position. At this time, even if there is a limitation on the arrangement of the light guide portion 10 in the interior space of the lamp chamber, the light guide portion 10 can be arranged by bending, so that the degree of freedom in design is improved. Further, by providing the light guide portion 10 with the light-shielding portion 15, there is no need to provide a large extension or the like, and it is possible to contribute to the reduction of the number of parts of the vehicle lamp 100 and the reduction of the internal space of the lamp 100.

The present invention is not limited to each of the above-described embodiments, and various modifications can be made within the scope of the claims, and an implementation obtained by appropriately combining the technical means disclosed in each of the different embodiments. The form is also included in the technical scope of the present invention.

100... Vehicle lamp 1... Light guide 10... Light guide part 11... Emitting end face 11a... Emitting end face corner 12... Incident region 13... Optical path part 13a... First plate part 13b... Second plate part 13c... First bend Portion 14... Guide surface 15... Shading portion 15a... Reflective film 15b... Shading film 16... Receiving portion 16a... Convex portion 16b... Streaky convex portion 17... Neck portion 20... Light pipe portion 21... Incident surface 22... Confronting surface 23... Reflection Step portion 23a... Reflective step portion reflecting surface 23b... Reflective step portion step surface 23c... Step 24... Light source portion 30... Unit portion 31... First extension 32... Second extension 33a... Body 33b... Cover

Claims (10)

A light source unit that emits light,
A cylindrical light pipe portion that extends in the first direction, receives light from the light source portion from one end, and guides the light inside;
It has a plate-shaped optical path portion extending in a second direction intersecting the first direction, the light is incident on the optical path portion from the light pipe portion, and the light is emitted from an emission end face of the optical path portion. And the light guide part
A vehicular lamp characterized in that a light-shielding portion that shields light is formed on a guide surface that intersects the emission end surface in the optical path portion. The vehicle lamp according to claim 1,
The vehicle lamp according to claim 1, wherein the light shielding portion includes a reflective film formed on the guide surface and a light shielding film formed on the reflective film. The vehicle lighting device according to claim 1 or 2, wherein:
The vehicular lamp, wherein the light shielding portion is provided at a predetermined distance from the emission end face. The vehicle lamp according to any one of claims 1 to 3,
The vehicle lighting device according to claim 1, wherein the light-shielding portion is formed on the two guide surfaces facing each other. The vehicle lamp according to any one of claims 1 to 4,
The vehicular lamp, wherein the light pipe portion and the light guide portion are integrally formed. The vehicle lamp according to any one of claims 1 to 5,
The vehicular lamp, wherein the optical path portion includes a first plate portion extending from the emission end surface and a first bent portion that is bent at a predetermined angle with respect to the first plate portion. The vehicular lamp according to claim 6,
The vehicle lamp according to claim 1, wherein the light shielding portion is formed only on the first plate portion. The vehicular lamp according to claim 6,
The vehicle light fixture, wherein the light-shielding portion is formed from the first plate portion to the first bent portion. The vehicular lamp according to any one of claims 6 to 8,
The vehicle lamp according to claim 1, wherein the optical path portion includes a second plate portion extending from the first bent portion and a second bent portion bent at a predetermined angle with respect to the second plate portion. The vehicle lamp according to any one of claims 6 to 9,
The vehicle lamp according to claim 1, wherein the predetermined angle is an angle at which the light guided in the optical path portion is totally reflected by the guide surface.