JP7137209B2 - vehicle lamp - Google Patents

Description

The present invention relates to a vehicle lamp having a light guide.

In recent years, vehicle lamps using light-emitting elements such as light-emitting diodes (LEDs) as light sources have become popular. Among such vehicular lighting fixtures, as shown in Patent Document 1, in vehicle width lights, stop lights (brake lights), and the like, a light pipe or the like is used to guide light from a light-emitting diode and direct the light to a predetermined position. A device that emits light is used. The light pipe is a columnar light guide member, and has a diffusion section formed with a plurality of steps. Using this diffusion section, incident light is uniformly diffused into the light pipe, and the light is emitted from the emission section. It is designed to emit.

FIG. 16 is a schematic cross-sectional view showing a conventional vehicle lamp 500. As shown in FIG. Each member constituting the interior of the lamp 500 is schematically shown. As shown in FIG. 16, in a configuration using a light pipe 501, a base 502 is provided on the rear surface for fixing the light pipe 501, and an inner base 502 is provided for emitting light from the light pipe 501 emitting portion in a predetermined direction. A lens 503 and the like were provided. Also, in the lamp 500, a plurality of lights are provided in a lamp body (lamp chamber), and the lights are selectively used according to the application. For example, a unit 504 such as an accessory lamp may be provided separately. Wiring is also routed to supply power to multiple lights.

On the other hand, the front surface (outgoing surface) of the lamp fixture 500 is made of a transparent cover or the like, so that the inside of the lamp chamber can be seen from the outside. Therefore, an extension 505 is provided as a screen so that unnecessary items such as wiring in the lamp chamber cannot be seen. The vehicle lamp 500 requires a plurality of members for emitting the light from the light source to the outside, and also requires an extension or the like to improve the appearance by hiding the internal wiring or the like. It's coming. In order to arrange these various members, a certain amount of internal space is required.

On the other hand, there is a demand for downsizing of lamps in order to reduce restrictions on where lamps can be placed in vehicles. In addition to further reducing the space inside the lamp, it is required to have the same or better functions as before the space saving, and a good appearance from the outside. In addition, from the viewpoint of manufacturing, it is also required to reduce the number of parts and make the assembly work more efficient.

JP 2017-195134 A

Therefore, the present invention has been made in view of the above conventional problems, and is a light that can be installed in a limited space, emits incident light uniformly, and prevents surrounding wiring, etc., from being seen from the outside. An object of the present invention is to provide a vehicle lamp with a guide.

In order to solve the above-described problems, the vehicle lamp of the present invention includes a light source section that emits light, and a light source section that extends in a first direction. and a plate-like optical path portion extending in a second direction intersecting the first direction. A light guide portion that emits light and a light shielding portion that shields light are formed on a guide surface that intersects with the emission end face in the optical path portion.

Further, according to one aspect 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 blocking portion is provided at a predetermined distance from the output end face.

In one aspect of the present invention, the light blocking portion is formed on two opposing guide surfaces.

In one aspect of the invention, the light pipe portion and the light guide portion are formed integrally.

Further, in one aspect of the present invention, the optical path section is characterized by including a first plate portion extending from the output end face and a first bent portion bent at a predetermined angle with respect to the first plate portion.

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

In one aspect of the present invention, the light shielding portion is formed from the first plate portion to the first curved portion.

In one aspect of the present invention, the optical path section is characterized by including 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.

In one aspect of the invention, the predetermined angle is an angle at which the light guided in the optical path section is totally reflected by the guide surface.

The present invention provides a vehicular lamp equipped with a light guide that can be installed in a limited space, sufficiently guides incident light, emits it uniformly, and prevents surrounding wiring and the like from being seen from the outside. can provide.

1 is a schematic cross-sectional view showing a vehicle lamp 100 according to a first embodiment; FIG. FIG. 2 is a schematic perspective view showing a light guide portion 10 and a light pipe portion 20 in FIG. 1, where (a) is a schematic front perspective view seen from the light guide portion 10 side, and (b) is a light 4 is a schematic rear perspective view seen from the pipe portion 20 side. FIG. FIG. 2A is a schematic top view showing a light guide portion 10, and FIG. 4A is a schematic top view of the light guide portion 10, and FIG. It is a partial top view which expanded the output end surface 11 vicinity. FIG. 3 is a schematic top view showing the light shielding portion 15 of the first embodiment; FIG. 3 is a schematic cross-sectional view of the light pipe section 20 of FIG. 2 cut along the A direction; 4 is a schematic partial perspective view enlarging a reflection step portion 23 portion of the light pipe portion 20. FIG. FIG. 3 is a schematic cross-sectional view showing a vehicle lamp 100 according to a second embodiment; FIG. 8 is a schematic perspective view showing a light guide portion 10 and a light pipe portion 20 in FIG. 7; FIG. 8 is a schematic diagram showing reflection of light within the light guide portion 10 in FIG. 7, and FIG. (b) shows reflection of light when the light shielding portion 15 is formed in the first bent portion 13c. FIG. 11 is a schematic perspective view showing a light guide portion 10 and a light pipe portion 20 of a third embodiment; FIG. 11 is a schematic top view showing the light guide portion 10 and the light pipe portion 20 of FIG. 10; FIG. 10A is a schematic top view showing a light guide portion 10 and a light pipe portion 20 as Modification 1 of the third embodiment, and FIG. FIG. (b) is a schematic top view showing Modification 1-2. FIG. 10A is a schematic top view showing a light guide portion 10 and a light pipe portion 20 as Modification 2 of the third embodiment, and FIG. FIG. (b) is a schematic top view showing Modification 2-2. FIG. 11 is a schematic top view showing a light guide portion 10 and a light pipe portion 20 as Modified Example 3 of the third embodiment; 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. FIG. 3 is a schematic cross-sectional view showing a conventional vehicle lamp 500;

(First embodiment)
BEST MODE FOR CARRYING OUT THE INVENTION 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 are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate. The vehicle lamp 100 of the present embodiment is used as a vehicle side lamp, a DRL (Daytime Running Lamp), a tail lamp, a stop lamp, etc., which are mounted on the left and right sides of a 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. b) is a schematic rear perspective view seen from the light pipe section 20 side. 3A and 3B are schematic top views showing the light guide portion 10. FIG. 3A is a schematic top view of the light guide portion 10, and FIG. It is the partial top view which expanded the surrounding output end surface 11 vicinity.

As shown in FIGS. 1 to 3, the vehicle 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 . Light from a light source (not shown) is emitted to the outside of the vehicle lamp 100 through the cover 33b.

As described above, the light guide 1 includes two portions, the light pipe portion 20 including the portion on which light is incident from the light source, and the light guide portion 10 for guiding the incident light to a predetermined location. In this embodiment, the light pipe portion 20 and the light guide portion 10 are integrally molded, but in this embodiment, the light guide 1 is divided into the light guide portion 10 and the light pipe portion 20 for explanation. In addition, the light guide 1 in the present invention is not limited to an 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 portion 10 is a plate-like member made of transparent resin such as acrylic or polycarbonate. The light guide portion 10 has an incident region 12 for receiving light from the light pipe portion 20, an optical path portion 13 for guiding the light incident from the incident region 12 inside the light guide portion 10, and faces the incident region 12. It has an emission end face 11 which is an end face and which emits the light in the optical path portion 13 , and a guide face 14 which is a surface intersecting with the emission end face 11 and forms the optical path portion 13 . A light blocking portion 15, which will be described later, is provided on the guide surface 14. As shown in FIG.

As described above, the light guide portion 10 is a plate-like portion extending from the light pipe portion 20, and the guide surface 14 is formed so as to connect the output end surface 11 and the incident area 12 in the direction A (second direction) in the drawing. It extends to form an optical path portion 13 .

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

The incident area 12 is an area where light from the light pipe section 20 enters the optical path section 13 . In the present embodiment, the portion continues from the light pipe section 20 , but for the sake of convenience, the area connected to the optical path section 13 is referred to as the incidence area 12 .

The optical path portion 13 is a main body portion of the light guide portion 10 and guides incident light to the output end face 11 . Light is guided in the A direction in the optical path portion 13 . The optical path portion 13 forms guide surfaces 14 on the left and right sides facing the direction B that intersects the direction A. As shown in FIG. In this 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 output end surface 11 and the incident area 12 .

As described above, the light guide portion 10 is made of transparent resin, and light can pass 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 can be seen through the one guide surface 14 .

The light shielding part 15 is provided to prevent an object behind the guide surface 14 from being seen through the light shielding part 15 . The light shielding portion 15 has at least a light shielding film. The light-shielding film is formed on the guide surface 14 by applying or vapor-depositing a light-shielding paint.

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

The light shielding portion 15 of this embodiment includes a reflective film 15a formed on the guide surface 14 and a light shielding film 15b formed on the reflective film 15a. The reflective film 15a has a function of reflecting light reaching the guide surface 14 inward. Specifically, the reflective film 15a is formed by coating or vapor-depositing a highly reflective color such as white or silver on the guide surface . The light shielding portion 15 further includes a light shielding film 15b on the upper surface of the reflective film 15a. The light shielding film 15b is for shielding external light (preventing light from the outside from penetrating through the light guide portion 10), and black paint or the like is applied or vapor-deposited on the reflecting film 15a. formed by

Although the two-layer structure of the reflective film 15a and the light shielding film 15b is employed in this embodiment, a single layer structure of the light shielding film 15b may be employed as described above. In this case, the light-shielding film 15b may be applied with a thick white paint. By doing so, it can also serve as the reflective film 15a. Alternatively, the light-shielding film 15b may have a color matching the color tone inside the vehicle lamp 100 .

Further, as shown in FIG. 3B, the light blocking portion 15 is provided at a predetermined distance t (about several millimeters) from the output end face 11 . That is, when the light shielding portion 15 is formed on the guide surface 14, the light shielding portion 15 is not formed up to the corner 11a between the output end surface 11 and the guide surface 14, but is extended from the corner 11a to the guide surface 14 by the distance t. The end of the light shielding part 15 should come. Specifically, when forming the reflective film 15a and the light shielding film 15b, a distance t between the output end face 11 and the corner 11a is masked so that the corner 11a and the output end face 11 are not coated with paint.

If the paint is applied or vapor-deposited only on the output end face 11 without masking the corner 11a, the paint may flow into the output end face 11 from the corner 11a. Part of the output end face 11 is shielded by the paint that has flowed in, and the area of the output end face 11 from which light is emitted is reduced. In this embodiment, in order to prevent such a reduction 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. The details of the action of the light shielding portion 15 will be described later.

In this embodiment, the light shielding portions 15 are provided on both sides of the guide surfaces 14 facing each other, but the present invention is not limited to this, and the guide surfaces 14 are provided in directions in which objects around the guide surfaces 14 should not be seen through. A configuration in which the light shielding portion 15 is provided only on the surface 14 and the light shielding portion 15 is not provided on the other guide surface 14 may be employed.

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 a direction C (first direction) that intersects the direction A, and has a substantially cylindrical shape in this embodiment. Like the light guide section 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 of the light that enters 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 incident surface 21 is irradiated with light from the light source section 24 .

FIG. 5 is a schematic cross-sectional view of the light pipe portion 20 of FIG. 2 cut along the A direction. FIG. 6 is a schematic partial perspective view enlarging the reflection step portion 23 of the light pipe portion 20. As shown in FIG.

As shown in FIGS. 5 and 6, the reflecting step portion 23 is continuously formed in the C direction from one end of the light pipe portion 20 to the other end. The reflective step portion 23 is formed by a plurality of steps 23c formed by combining a reflective surface 23a inclined toward the inside of the light pipe portion 20 and a step surface 23b rising from the reflective 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 . Then, the light is guided toward the incident area 12 of the light guide section 10 .

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

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

The light guided through the light pipe section 20 repeats bright and dark in the C direction according to the formation interval of the reflective surfaces 23 a of the reflective step section 23 of the light pipe section 20 . Therefore, the light emitted from the emission end face 11 of the light guide portion 10 also becomes light in which the brightness and darkness are repeated.

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 lighting unit that realizes the functions of a headlight, a stop light, an accessory light, and the like, and emits predetermined light from an arc-shaped emission surface in the drawing. is.

The first extension 31 is arranged in front of the wiring and the like near the unit section 30 and serves as a screen to prevent unnecessary things such as the internal wiring and the like from being seen from the outside. The second extension 32 is positioned behind the light pipe section 20, and prevents the wiring and the like on the back side of the light pipe section 20 from being seen through the light pipe section 20. It is located between and serves as a screen. The first extension 31 and the second extension 32 may be formed integrally with the body 33a, or may be formed separately and assembled. Also, these are made of resin, metal, or the like. The body 33a and the cover 33b form the outer shape of the vehicle lamp 100, and have a structure in which the transparent cover 33b is positioned forward in the emission direction.

When the light source and the emission surface of the lamp 100 are separated from each other like the vehicle lamp 100 of this embodiment, the light guide section 10 is required to guide the light from the light source to the emission surface. As described above, since the light guide portion 10 is transparent, the wiring and the like around the light guide portion 10 can be seen through the light guide portion 10 through the light guide portion 10 . Conventionally, an extension is provided separately in order to make such a thing invisible from the outside of the lamp 100 invisible, and a separate space for the extension is required inside the lamp 100 . Further, the larger the light guide portion 10, that is, the greater the distance from the light source to the exit surface, the wider the range protected by the extension and the larger the extension. As described above, there are cases where the space inside the lamp 100 is limited and the extension cannot be provided.

However, as described above, in this 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 can be seen through the guide surface 14 through the light guide portion 10. There is no such thing as That is, since the light shielding portion 15 serves as an extension, there is no need to provide an extension separately. In addition, since the light incident on the light pipe portion 20 from the light source portion 24 passes through the optical path portion 13 of the light guide portion 10 and is emitted in a predetermined direction from the emission end face 11, an accessory member such as an inner lens is not required.

As described above, since the light shielding portion 15 serves as an extension, members such as extensions that have been conventionally provided become unnecessary. In addition, since the space for the extension is not required, the space inside the lamp chamber can be saved. Since the number of parts is reduced in this way, the degree of freedom in designing the space inside the vehicle lamp 100 is increased, and the vehicle lamp 100 can be provided in a smaller size than the conventional one.

(Second embodiment)
In the first embodiment, the light guide section 10 has a straight plate-like shape from the incident area 12 to the output end surface 11 . In this embodiment, a form in which a part of the optical path section 13 is bent will be described. In this embodiment, a form in which a part of the light guide portion 10 is bent will be described in order to increase the degree of freedom in design, such as downsizing the vehicle lamp 100 .

FIG. 7 is a schematic cross-sectional view showing the vehicle lamp 100 according to this embodiment. 8 is a schematic perspective view showing the light guide portion 10 and the light pipe portion 20 in FIG. 7. FIG. 9A and 9B are schematic diagrams showing reflection of light in the light guide portion 10 in FIG. 7, and FIG. 4B shows reflection of light when the light blocking portion 15 is formed in the first bent portion 13c.

As shown in FIGS. 7 and 8, the light guide section 10 of this embodiment has a shape in which a part of the optical path section 13 is bent and two flat plates are connected at a predetermined angle. Specifically, the optical path portion 13 includes a first plate portion 13a extending from the output end face 11, a first bent portion 13c which is a corner bent at a predetermined angle with respect to the first plate portion 13a, and a first bent portion 13c. A second plate portion 13 b extending to the incident area 12 is provided. The first bent portion 13 c has an angle such that the light guided through 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 this embodiment is not provided on substantially the entire surface of the guide surface 14, but is provided only on the guide surface 14 of the first plate portion 13a. 8 and 9A, the first bent portion 13c is not shielded from light by the light shielding portion 15. As shown in FIGS. 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 traveling through the second plate portion 13b is reflected by the first curved portion 13c. Total reflection. Therefore, when the emitted light is viewed while facing the output end face 11, a point-like light with brightness depending on the interval of the step 23a of the reflecting step portion 23 of the light pipe portion 20 can be seen.

FIG. 9(b) is a schematic diagram showing reflection of light in the light guide portion 10 in which the light shielding portion 15 is provided up to the first bent portion 13c, which is a modification of the present embodiment.

As a modification, as shown in FIG. 9B, the light shielding portion 15 may also be formed on the guide surface 14 of the first plate portion 13a and the first bent portion 13c. In this way, when the first bent portion 13c is also covered with the light shielding film 15b, the light α1 traveling through the second plate portion 13b is The light is scattered and reflected by the first bent portion 13c. Therefore, the reflected light α2 does not have brightness and darkness as in the case where the first bent portion 13c is not shielded from light, but becomes diffused light with a spread. Therefore, the light emitted from the emission end face 11 becomes diffused light with a spread like the light of a fluorescent lamp.

Also, the light shielding portion 15 may be formed substantially entirely on the first plate portion 13a and the second plate portion 13b. As described in the first embodiment, the corner 11a of the output end face 11 is not coated with paint in order to prevent the paint from entering the output end face 11. FIG.

By bending a portion of the light guide portion 10 in this way, it is possible to reduce restrictions on the arrangement and increase the degree of freedom in designing the vehicle lamp 100 . In addition, depending on the characteristics of the light to be emitted, it is possible to adjust whether or not the light shielding portion 15 shields the curved corner 13c, so that sharp light, broad diffused light, and emitted light can be used properly.

In the present embodiment, the first bending portion 13c is bent once, but the present invention is not limited to one bending, and may be bent multiple times according to 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 desirably an angle that causes total reflection, but it 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 a columnar (straight) shape, but the light pipe portion 20 in the present invention is not limited to a columnar shape, and may be bent and extended. It may be one that has When the light pipe portion 20 is bent and extended, the light guide portion 10 is also bent along with the bending of the light pipe portion 20 . Moreover, the output end face 11 is not limited to extending straight in the direction of the arrow C, but may be appropriately curved according to the alignment of the light to be emitted, that is, the lighting shape to be displayed when various lights are viewed from the outside of the vehicle. good too.

By bending and curving the light pipe portion 20 and the light guide portion 10 in this manner, the optical path can be designed without depending on the limitation of the installation location in the lamp chamber, and the degree of freedom in design is improved. In addition, 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 section 10 in this embodiment is not joined to the light pipe section 20 and is a separate body. 11 is a schematic top view showing the light guide portion 10 and the light pipe portion 20 of FIG. 10. FIG.

In the present embodiment, in the incident area 12 joined to the light pipe section 20, the light of the light pipe section 20 is ensured widely, and the light guide section 10 is provided with a light guide section 10 in order to provide a degree of freedom in the arrangement location within the lamp chamber. It has a separate structure from the pipe portion 20 . Further, a U-shaped receiving portion 16 with one open end is provided at the tip of the incident region 12 , and positioned so as to cover the light pipe portion 20 with this receiving portion 16 .

The receiving portion 16 has a shape in which a portion of a cylinder is opened, and is shaped so as to cover the entire cylindrical light pipe portion 20 . 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 formed from the rear surface of the receiving portion 16 to have the same width as the optical path portion 13 . The end of the neck portion 17 becomes the incident area 12, and the position of the incident area 12 on the back surface of the receiving portion 16 is appropriately adjusted according to the waveguide direction of the light from the receiving portion 16 and the condition 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 is referred to as the neck portion 17 in this embodiment for convenience.

The subsequent optical path portion 13 extends through the neck portion 17 and the first bent portion 13c bent at a predetermined angle. A bending angle β of the first bending 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 provided with an output end face 11 from which light is emitted.

The light shielding portion 15 of the present embodiment may be formed over the entire surface from the receiving portion 16 to the neck portion 17 and the guide surface 14, or may be formed from the vicinity of the output end surface 11 to the first bent portion as shown in the second embodiment. Up to part 13 may be used.

Here, by covering the periphery of the light pipe portion 20 with the receiving portion 16, not only the light from the facing surface 22 as in the first embodiment, but also the light from each direction can be collected. improve ability. Further, by providing the receiving portion 16, the degree of freedom in the position of the neck portion 17 is increased, and the degree of freedom in designing according to the restrictions of the internal space of the vehicle lamp 100 is also improved.

(Modification 1-1)
FIG. 12 is a schematic top view showing the light guide portion 10 and the light pipe portion 20 of Modification 1 of the third embodiment, and FIG. 12(a) is a schematic top view showing Modification 1-1. , and FIG. 4(b) is a schematic top view showing Modification 1-2.

In Modification 1-1, the joint range between the neck portion 17 and the receiving portion 16 is widened, and the neck portion 17 is provided with a thick portion so that the thick portion collects light. By widening the joint 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 furthermore, the light is reflected by the thick portion, condensed, and sent to the optical path portion 13. can lead.

(Modification 1-2)
In the modified example 1-2, a V-shaped space 17b is provided by cutting the inside of the thick neck portion 17 into a V-shape. Reflection of light also occurs within this V-shaped space, and the structure is such that the light is collected at the tip of the V-shape. Therefore, as in Modification 1, the light received by the receiving portion 16 can be secured over a wide range, and the light can be collected at the V-shaped tip. can be done.

(Modification 2-1)
FIG. 13 is a schematic top view showing the light guide portion 10 and the light pipe portion 20 of Modification 2 of the third embodiment, and FIG. 13A is a schematic top view showing Modification 2-1. , and FIG. 4(b) is a schematic top view showing Modification 2-2.

In Modified Example 2-1, a protrusion 16a is provided at a position facing the neck portion 17 on the inner surface of the receiving portion 16 facing the light pipe portion 20 .

The convex portion 16 a is a semi-cylindrical projection that forms an arc toward the inside of the receiving portion 16 . The convex portion 16 a has a structure in which light is reflected in a complicated manner by the convex portion 16 a and the light is collected at the neck portion 17 .

(Modification 2-2)
Modification 2-1 shows an example in which only one projection 16a is provided on the receiving portion 16, but in this modification, a streaky projection 16b in which a plurality of projections are arranged is provided. The streak-like projection 16b is formed by repeating a plurality of streaks and recesses 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 arc-shaped semicylindrical projections are arranged.

By providing such streak-like protrusions 16 b , light is reflected in a more complicated manner by the streak-like protrusions 16 b , and the light is concentrated on 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 as Modification 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 that bends twice. By bending twice at the neck portion 17 , the light is totally reflected at the two bending points and guided to the optical path portion 13 .

In this way, 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 several times to fit the limited space. It is also possible to configure The bending angle of the bent portion is desirably an angle at which light can be totally reflected, for example, about 42 to 45 degrees. By setting the angle at which total reflection is possible in this way, it is possible to emit approximately the incident light.

By providing the receiving portion 16 and the neck portion 17 in this manner, variations in the light collecting path can be generated, and by appropriately arranging them according to the installation space, more light can be collected in the light guide portion 10. can be emitted in the intended emission direction. Therefore, even if the light source and the emission position are distant, the light from the light source can be guided to the predetermined emission position. At this time, even if there is a restriction on the arrangement of the light guide portion 10 in the space inside the lamp room, the light guide portion 10 can be arranged by bending it, etc., so that the degree of freedom in design is improved. Further, by providing the light shielding portion 15 in the light guide portion 10, there is no need to provide a large extension or the like, which contributes to a reduction in the number of components of the vehicle lamp 100 and a compact interior space of the lamp 100.

The present invention is not limited to the above-described embodiments, but can be modified in various ways within the scope of the claims, and can be implemented by appropriately combining technical means disclosed in different embodiments. The form is also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 100... Vehicle lamp 1... Light guide 10... Light guide part 11... Output end face 11a... Corner part 12 of an output end face... Incidence area 13... Optical path part 13a... First plate part 13b... Second plate part 13c... First bending Portion 14... Guide surface 15... Light shielding part 15a... Reflective film 15b... Light shielding film 16... Receiving part 16a... Convex part 16b... Striped convex part 17... Neck part 20... Light pipe part 21... Entrance surface 22... Opposing surface 23... Reflection Step portion 23a Reflecting surface 23b of reflecting step portion Step surface 23c of reflecting step portion 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 tubular light pipe portion extending in a first direction, into which light from the light source portion is incident from one end and guiding the light inside;
A plate-like optical path portion extending in a second direction crossing the first direction is provided, 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. a light guide part that
A vehicular lamp, wherein a light shielding portion for shielding light is formed on a guide surface that intersects with the emission end face in the optical path portion. The vehicle lamp according to claim 1,
The vehicular lamp, 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 lamp according to claim 1 or 2,
The vehicular lamp, wherein the light shielding portion is provided at a predetermined distance from the light emitting end face. The vehicle lamp according to any one of claims 1 to 3,
The vehicular lamp, 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,
A vehicle 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,
A vehicular lamp, wherein the optical path portion includes a first plate portion extending from the output end face, and a first bent portion bent at a predetermined angle with respect to the first plate portion. The vehicle lamp according to claim 6,
The vehicle lamp, wherein the light shielding portion is formed only on the first plate portion. The vehicle lamp according to claim 6,
The vehicle lamp, wherein the light shielding portion is formed from the first plate portion to the first bent portion. The vehicle lamp according to any one of claims 6 to 8,
The vehicle lamp, 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, wherein the predetermined angle is an angle at which the light guided in the optical path portion is totally reflected by the guide surface.

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