JP2020035714A - Vehicle light guiding body and vehicle lighting fixture - Google Patents

Abstract

To suppress degradation in appearance.SOLUTION: A vehicle light guiding body 100 includes: a first light guiding body 10 which is rod-like, makes light from a first light source 51 incident from a first incident plane 11, guides the incident light and emits it from a first emission surface 13; a second light guiding body 20 which is rod-like and has a base 20a that makes light from a second light source 52 incident from a second incident plane 21, guides a part of the incident light and emits it from a second emission surface 23 and an end part 20b guiding light passing the base 20a to the other end part 20d; and a plate-like part 30 which is connected to a side face of the first light guiding body 10, provided along the longitudinal direction of the first light guiding body 10, connects the other end part 20d of the second light guiding body 20, and can guide light from the other end part 20d to the first light guiding body 10. The plate-like part 30 has light diffusion parts (31a, 32a, 32b, 32c) diffusing light from the second light source 52 inward the plate-like part 30.SELECTED DRAWING: Figure 3

Description

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

  2. Description of the Related Art A vehicular lamp equipped with a vehicular light guide that guides light from a light source to emit light is known (for example, see Patent Document 1). In such a light guide for a vehicle, light emitted from a light source is incident from one end in the longitudinal direction of the light guide for a vehicle, and the incident light is guided along the longitudinal direction and emitted from a side surface. I do.

JP 2014-7014 A

  In the above-described light guide for a vehicle, when the length in the longitudinal direction increases, the illuminance decreases as the distance from the light source increases. On the other hand, for example, when a plurality of vehicle light guides are used, another vehicle light guide is connected to the side surface of one vehicle light guide, A configuration is conceivable in which the light is supplied to one vehicle light guide to compensate for the illuminance of a portion remote from the light source. However, with this configuration, there may be a case where the connection portion emits light and the appearance deteriorates.

  The present invention has been made in view of the above, and an object of the present invention is to provide a vehicular light guide and a vehicular lamp capable of suppressing deterioration in appearance.

  The vehicle light guide according to the present invention has a rod shape, and light from a first light source enters from a first incident surface provided at one end in a longitudinal direction, and guides the incident light to produce a vehicle. A first light guide that exits from a first exit surface provided on a front side surface in a mounted state, and light from a second light source that is rod-shaped and enters from a second entrance surface that is provided at one end in the longitudinal direction A base that guides a part of the incident light and emits from a second emission surface provided on a front side surface in a vehicle mounted state, and the light that has passed through the base is attached to the other end in the longitudinal direction. A second light guide having a light-guiding tip, and a second light guide connected to a side surface of the first light guide and provided along a longitudinal direction of the first light guide, A plate-shaped portion to which the other end is connected and which can guide the light from the other end to the first light guide; For example, the plate-like portion includes a light diffusing portion that diffuses to the inside of the plate-like portion of the light from the second light source.

  In the above light guide for vehicles, the second light guide has a base having a curved portion, and the plate-shaped portion has a portion connected to the curved portion of the second light guide. The light diffusing unit may be arranged at a position corresponding to the bending unit.

  In the above light guide for vehicles, the light diffusing portions may be provided in multiple stages in the up-down direction when the vehicle is mounted.

  In the above light guide for a vehicle, the light diffusing portion may be disposed on a front surface of the plate-shaped portion in a vehicle mounted state.

  In the above light guide for a vehicle, the light diffusing portion may be arranged along a longitudinal direction of the curved portion.

  In the above light guide for vehicles, the second light guide has the other end of the tip portion connected to the plate-shaped portion from above in a vehicle-mounted state, and the light diffusing portion includes The front surface and the rear surface of the shape portion may be arranged at a position opposite to the surface connected to the other end, at a position overlapping the connection portion.

  In the above light guide for vehicles, the light diffusing portion may be arranged along a longitudinal direction of the first light guide.

  A vehicle lamp according to the present invention includes a light source, and the above-described vehicle light guide, which guides light from the light source and emits the light forward of the vehicle.

  The above-described vehicle lamp may include a cover portion that covers at least the distal end portion and the plate-shaped portion of the second light guide when viewed from the front when mounted on the vehicle.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a vehicle light guide and a vehicle lamp capable of suppressing deterioration in appearance.

FIG. 1 is a front view illustrating an example of a vehicular lamp according to the present embodiment. FIG. 2 is a front view illustrating an example of the vehicular lamp according to the present embodiment. FIG. 3 is a front view illustrating an example of the vehicle light guide according to the present embodiment. FIG. 4 is a rear view illustrating an example of the vehicle light guide according to the present embodiment. FIG. 5 is a diagram showing a configuration along the AA cross section in FIG. FIG. 6 is a diagram showing a configuration along a BB section in FIG. FIG. 7 is a diagram showing a configuration along a CC section in FIG. FIG. 8 is a diagram illustrating an example of a case where the light source is turned on in the vehicle light guide according to the present embodiment. FIG. 9 is a front view showing an example of a vehicle light guide according to a modification. FIG. 10 is a diagram showing a configuration along a DD section in FIG.

  Hereinafter, an embodiment of a vehicular light guide and a vehicular lamp according to the present invention will be described with reference to the drawings. Note that the present invention is not limited by the embodiment. The components in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same. In the following description, the front, rear, up, down, left, and right directions are directions in a vehicle mounted state in which the vehicle light guide and the vehicle lamp are mounted on the vehicle, and when the traveling direction of the vehicle is viewed from the driver's seat. Shows the direction at. In this embodiment, the vertical direction is parallel to the vertical direction, and the horizontal direction is horizontal.

  1 and 2 are front views illustrating an example of a vehicle lamp 200 according to the present embodiment. FIG. 1 shows a state in which the cover is removed, and FIG. 2 shows a state in which the cover is attached. As shown in FIGS. 1 and 2, the vehicular lamp 200 includes a light source 50, a vehicular light guide 100, a lamp housing 110, a lamp lens 120, and a cover 130.

  In the present embodiment, the vehicle lamp 200 includes, for example, a clearance lamp. Further, in the vehicle lamp 200, for example, a low-beam lamp, a high-beam lamp, a fog lamp, a cornering lamp, and the like may be arranged in the lamp room defined by the lamp housing 110 and the lamp lens 120, in addition to the clearance lamp. . The cover part 130 covers the light source 50 and a part of the vehicle light guide 100 (the distal end part 20b of the second light guide 20 and the plate-shaped part 30 described later) when viewed from the front.

  The vehicular lamp 200 is attached to the front left and right sides of the vehicle. In the present embodiment, a vehicle lamp mounted on the right side of the front part of the vehicle will be described as an example. In addition, the vehicle lamp mounted on the left side of the front part of the vehicle is symmetrical with respect to the vehicle lamp 200, and the same description is possible. In the vehicle lamp 200 mounted on the right side of the vehicle, the outside of the vehicle is the right side, and the inside of the vehicle is the left side. In the vehicle lamp mounted on the left side of the vehicle, the outside of the vehicle is the left side, and the inside of the vehicle is the right side.

<Light source>
The light source 50 supplies light to the vehicle light guide 100. The light source 50 has a first light source 51 and a second light source 52. The first light source 51 and the second light source 52 are semiconductor light sources such as an LED, an OEL, and an OLED (organic EL). The first light source 51 has a light emitting surface 51a that emits light so as to form a Lambertian distribution. The light emitting surface 51a is arranged to face a first incident surface 11 of a first light guide 10 described later. The second light source 52 has a light emitting surface 52a that emits light so as to form a Lambertian distribution. The light emitting surface 52a is arranged to face a second incident surface 21 of a second light guide 20 described later.

<Vehicle light guide>
FIG. 3 is a front view showing an example of the vehicle light guide 100 according to the present embodiment. FIG. 4 is a rear view showing an example of the light guide 100 for a vehicle. FIG. 5 is a diagram showing a configuration along the AA cross section in FIG. FIG. 6 is a diagram showing a configuration along a BB section in FIG. FIG. 7 is a diagram showing a configuration along a CC section in FIG. The vehicle light guide 100 shown in FIGS. 3 to 7 includes a first light guide 10, a second light guide 20, and a plate-shaped portion 30. The first light guide 10, the second light guide 20, and the plate-shaped portion 30 are formed using, for example, a transparent resin material, and are formed as one member by molding or the like.

<First light guide>
The first light guide 10 is rod-shaped, and has a curved portion 10e and a straight portion 10f. After molding the light guide 100 for a vehicle, by applying a force to the linear portion 10f when removing the die, the die can be removed smoothly. The first light guide 10 has a circular cross-sectional shape from a plane perpendicular to the longitudinal direction from one end 10c to the other end 10d in the longitudinal direction. The first light guide 10 has a first incident surface 11, a first prism part 12, and a first emission surface 13. The first incident surface 11 is provided at one end of the first light guide 10 in the longitudinal direction. The first incident surface 11 has, for example, a planar shape, and faces the light emitting surface 51a of the first light source 51, and receives light from the first light source 51.

  The first prism portions 12 are arranged on the rear side of the first light guide 10 in the vehicle mounted state in a state where a plurality of the first prisms 12 are arranged in the longitudinal direction of the first light guide 10. The first prism portion 12 is formed, for example, in a concave shape that is concave on the front side of the first light guide 10, but is not limited thereto. It may be formed in a shape. The first prism unit 12 reflects light incident from the first incident surface 11 toward the front of the vehicle. The first light exit surface 13 is provided on the front side of the first light guide 10 in a vehicle mounted state. The first emission surface 13 has, for example, a cylindrical shape, and emits light reflected by the first prism portion 12 to the front of the vehicle.

<Second light guide>
The second light guide 20 has a rod shape and is arranged above the first light guide 10. The second light guide 20 has a base 20a and a tip 20b. The base 20a has, for example, a circular cross-sectional shape in a plane perpendicular to the longitudinal direction. The base 20a has a shape having a curved portion 20e and a straight portion 20f. The bending portion 20e is provided at a position corresponding to the bending portion 10e of the first light guide 10, for example. The straight portion 20f is provided, for example, at a position on the distal end portion 20b side with respect to the curved portion 20e. Thus, the second light guide 20 is arranged along the first light guide 10. The base 20a has a second incident surface 21, a second prism unit 22, and a second emission surface 23.

  The second incident surface 21 is provided at one end 20 c of the second light guide 20 in the longitudinal direction. The second incident surface 21 has, for example, a planar shape, and faces the light emitting surface 52a of the second light source 52, and light from the second light source 52 enters.

  The second prism portions 22 are arranged on the rear side of the second light guide 20 in the vehicle mounted state in a state where a plurality of the second light guides 20 are arranged in the longitudinal direction of the second light guide 20. The second prism portion 22 is formed, for example, in a concave shape that is concave on the front side of the second light guide 20, but is not limited thereto, and has a convexity that protrudes rearward on the rear surface of the second light guide 20. It may be formed in a shape. The second prism portion 22 reflects light incident from the second incident surface 21 toward the front of the vehicle. The second light exit surface 23 is provided on the front side of the second light guide 20 in a vehicle mounted state. The second emission surface 23 has, for example, a cylindrical shape, and emits light reflected by the second prism portion 22 to the front of the vehicle.

  The distal end portion 20b guides a part of the light incident from the second incident surface 21 and passing through the base portion 20a to the other end portion 20d. The distal end portion 20b is curved toward the plate-like portion 30 from the base portion 20a to the other end portion 20d. The other end 20d of the tip 20b is connected to, for example, a front surface of the plate-shaped portion 30.

  As shown in FIG. 6, the distal end portion 20 b is tapered toward the plate-shaped portion 30. The tip portion 20b has, for example, a dimension (thickness) in the front-rear direction gradually thinning from the base portion 20a side to the other end portion 20d side. In other words, the cross-sectional shape of the distal end portion 20b in a plane perpendicular to the longitudinal direction gradually changes from a circular shape to a flat plate shape from the base portion 20a side to the other end portion 20d side. Note that the distal end portion 20b may be formed such that the dimension (width) in the left-right direction is tapered toward the plate-shaped portion 30.

<Plate part>
The plate-shaped portion 30 has a flat plate shape, is connected to a portion of the side surface of the first light guide 10 that is different from the first emission surface 13, and is disposed along the longitudinal direction. In the present embodiment, the plate-shaped portion 30 is disposed on the upper side of the side surface of the first light guide 10 in the vehicle mounted state. The plate-shaped portion 30 is provided over the whole of the first light guide 10 in the longitudinal direction from one end 10c to the other end 10d. The plate-shaped portion 30 has a uniform dimension (thickness) in the front-rear direction over the entire length. When the vehicle light guide 100 is viewed from the front, the upper side of the first light guide 10 has a linear shape along the longitudinal direction of the first light guide 10. That is, the upper side of the first light guide 10 does not have an inflection portion bent upward or downward when viewed from the front.

  The plate portion 30 has a first portion 31 and a second portion 32. The first portion 31 is a portion connected to the first light guide 10. The first portion 31 is provided over substantially the entire length of the first light guide 10. The first portion 31 has a uniform dimension in a direction (width direction) orthogonal to the longitudinal direction when viewed from the front. The second portion 32 is a portion connected to the second light guide 20. The second portion 32 is provided in a region sandwiched between the first portion 31 and the second light guide 20. The second portion 32 is provided over substantially the entire length of the second light guide 20. Therefore, the first light guide 10 and the second light guide 20 are in a state where the opposing side surfaces are integrally connected by the first portion 31 and the second portion 32 of the plate-shaped portion 30, and have high rigidity. Is secured.

  The plate portion 30 is capable of guiding light from the second light source 52. In the present embodiment, in the plate-shaped portion 30, light reaching the other end 20d from the second light source 52 via the base 20a and the tip 20b is a front surface connected to the other end 20d. Incident on. The plate portion 30 guides the incident light to the first light guide 10.

<Light diffusion part>
The plate-shaped portion 30 is provided with a prism portion 31a, a grain portion 32a, a prism portion 32b, and a prism portion 32c as light diffusion portions.

  The prism portion 31 a is disposed on the rear surface of the first portion 31 at a position overlapping with a connection portion connected to the other end 20 d of the second light guide 20. That is, the prism portion 31a is disposed on the surface of the first portion 31 opposite to the surface connected to the other end 20d. The prism part 31a diffuses the light incident on the inside of the plate-shaped part 30 from the other end 20d of the second light guide 20 to the inside on the rear surface of the plate-shaped part 30, so that the light is diffused. The light is prevented from being emitted to the rear of the plate-shaped portion 30. The prism portion 31a has, for example, a prism portion in which a plurality of light reflecting surfaces are arranged along the longitudinal direction of the first light guide 10.

  The prism portion 31a is provided, for example, in a range protruding from the connection portion with the other end portion 20d to both sides of the first light guide 10 in the longitudinal direction. The range in which the prism portion 31a is arranged is not limited to this, and may be provided in a range protruding from the connection portion with the other end 20d to one side in the longitudinal direction, or may be provided with the other end 20d. It may be provided in a range that does not protrude from the connection portion.

  The embossed portion 32a is provided on a surface on the front side of the second portion 32, for example, at a portion different from the portion where the prism portions 32b and 32c are provided. The embossed portion 32a is provided, for example, on the entire surface of a portion on the light source 50 side (upstream portion) of the second portion 32, and a first light guide is provided on a portion opposite to the light source 50 (downstream portion). 10 and a portion along the second light guide 20. Further, a flat portion 32d in which the embossed portion 32a is not formed is provided at a central portion in the vertical direction in a downstream portion of the second portion 32. Note that the flat portion 32d may not be provided. In this case, the embossed portion 32 a is provided on the entire surface of the downstream portion of the second portion 32.

  The prism portion 32b is provided at a position on the front surface of the second portion 32 corresponding to the curved portion 20e of the second light guide 20. The prism part 32b diffuses the light entering the plate-shaped part 30 in the curved part 20e of the light incident from the second incident surface 21 into the inside of the plate-shaped part 30 so that the light is emitted from the plate-shaped part 30. It is suppressed from being emitted forward. The prism portion 32b is provided along a longitudinal direction of the second light guide 20, for example, at a portion where a plurality of reflection surfaces are in contact with the curved portion 20e.

  The prism portion 32c is provided at a position corresponding to the curved portion 10e of the first light guide 10 on the front surface of the second portion 32. The prism part 32c diffuses the light that enters the plate-shaped part 30 side and travels to the first light guide 10 side in the curved part 20e of the light incident from the second incident surface 21 into the plate-shaped part 30. This suppresses the light from being emitted to the front of the plate-shaped portion 30. The prism portion 32c is provided along a longitudinal direction of the first light guide 10, for example, at a portion where a plurality of reflection surfaces are in contact with the curved portion 10e.

<Cover part>
As shown in FIG. 2, the vehicle lamp 200 has a cover 130. The cover unit 130 is disposed in front of the light guide 100 for a vehicle. The cover 130 has a first opening 131 and a second opening 132. The first opening 131 is provided at a portion corresponding to the first emission surface 13 of the first light guide 10. The second opening 132 is provided at a portion corresponding to the second emission surface 23 of the second light guide 20.

  When the vehicular lamp 200 is viewed from the front, the cover 130 covers the light source 50 and a portion of the vehicular light guide 100 other than the portion where the first opening 131 and the second opening 132 are provided. It is provided in the state where it was set. That is, the cover 130 is provided so as to cover the light source 50, the distal end portion 20 b of the second light guide 20, and the plate-shaped portion 30 when viewed from the front. Therefore, the configuration of the connection portion between the second light guide 20 and the plate-shaped portion 30 is not visible from the outside due to the cover portion 130.

  FIG. 8 is a diagram illustrating an example of a case where the light source 50 is turned on in the vehicular light guide 100 according to the present embodiment. As shown in FIG. 8, light emitted from the first light source 51 and the second light source 52 is transmitted from the first incident surface 11 and the second incident surface 21 to the first light guide 10 and the second light guide 20, respectively. Incident.

  The light L <b> 1 incident from the first incident surface 11 is guided along the longitudinal direction while being internally reflected inside the first light guide 10. The light L1 is reflected by the first prism unit 12 toward the front of the vehicle. The light L1 reflected by the first prism portion 12 is emitted from the first emission surface 13 of the first light guide 10 toward the front of the vehicle.

  Part of the light L2 incident from the second incident surface 21 is guided along the longitudinal direction while being internally reflected at the base 20a of the second light guide 20. The light L2 is reflected by the second prism portion 22 toward the front of the vehicle. The light L2 reflected by the second prism portion 22 is emitted from the second emission surface 23 of the second light guide 20 toward the front of the vehicle.

  Note that a part of the light L2 incident from the second incident surface 21 may enter the second portion 32 of the plate portion 30 in the curved portion 20e. In the present embodiment, the light is diffused into the plate-like portion 30 by the grain portion 32a, the prism portion 32b, and the prism portion 32c. For this reason, it is possible to suppress a part of the light L2 that has entered the second portion 32 from being emitted forward and backward of the plate-shaped portion 30.

  In addition, a part of the light L2 incident from the second incident surface 21 and passing through the base 20a is guided to the other end 20d along the longitudinal direction at the tip 20b. Part of the light L2 that has reached the other end 20d enters the plate-shaped portion 30 from the other end 20d. Part of the light L <b> 2 incident on the plate portion 30 is guided by the plate portion 30 and enters the first light guide 10. In this case, a part of the light L2 is incident on, for example, a position of the first light guide 10 that is separated from the first light source 51 in the longitudinal direction.

  In the present embodiment, when the vehicle light guide 100 is viewed from the front, at least in the vicinity of a portion where the other end portion 20d of the second light guide 20 is arranged on the side surface of the first light guide 10, The configuration has a constant shape in the longitudinal direction and does not have an inflection portion. Therefore, when part of the light L2 that has reached the other end 20d of the second light guide 20 is incident on the first light guide 10 through the plate-shaped portion 30, the first light guide 10 The formation of spotlight on the side surface is suppressed.

  A part of the light L2 that enters the first portion 31 of the plate-shaped portion 30 from the other end 20d and reaches the rear surface is diffused into the plate-shaped portion 30 by the prism portion 31a. For this reason, it is possible to suppress a part of the light L <b> 2 reaching the rear surface of the first portion 31 from being emitted behind the plate-shaped portion 30.

  A part of the light L1 incident on the first light guide 10 is guided along the longitudinal direction while being internally reflected inside the first light guide 10, and is reflected toward the front of the vehicle by the first prism portion 12. Is done. Part of the light L1 reflected by the first prism portion 12 is emitted from the first emission surface 13 toward the front of the vehicle.

  As described above, the vehicular light guide 100 according to the present embodiment has a rod shape, and the light L1 from the first light source 51 enters from the first incident surface 11 provided at one end 10c in the longitudinal direction. A first light guide 10 that guides the incident light L1 and emits it from a first emission surface 13 provided on a front side surface in a vehicle mounted state, and a rod-like light L2 from a second light source 52. A base that enters from a second incident surface 21 provided at one end 20c of the direction, guides a part of the incident light L2, and emits from a second exit surface 23 provided on a front side surface in a vehicle mounted state. 20a, a second light guide 20 having a tip 20b for guiding the light L2 that has passed through the base 20a to the other end 20d in the longitudinal direction, and the second light guide 20 connected to the side surface of the first light guide 10 A second light guide is provided along the longitudinal direction of the first light guide 10. A plate-shaped portion 30 connected to the other end 20d of the body 20 and capable of guiding the light from the other end 20d to the first light guide 10; Light diffusing portions (31a, 32a, 32b, 32c) for diffusing light L2 from the inside into the plate-shaped portion 30.

  With this configuration, when the vehicle light guide 100 is viewed from the front, at least a portion of the side surface of the first light guide 10 where the other end portion 20d of the second light guide 20 is disposed is long. The shape is constant in the direction, and no inflection portion is formed. Therefore, when part of the light L2 that has reached the other end 20d of the second light guide 20 is incident on the first light guide 10 through the plate-shaped portion 30, the first light guide 10 The formation of spotlight on the side surface is suppressed. Therefore, a part of the light L2 can be supplied from the second light guide 20 to the first light guide 10 while suppressing the formation of the spotlight. Further, the light diffusing portions (31a, 32a, 32b, 32c) of the plate portion 30 can diffuse the light entering the plate portion 30 from the second light guide 20 into the plate portion 30. Therefore, it is possible to suppress the light that enters the plate-shaped portion 30 from the second light guide 20 from being emitted from the plate-shaped portion 30 forward and backward. As a result, it is possible to suppress a reduction in appearance.

  In the vehicular light guide 100 according to the present embodiment, the second light guide 20 has a base 20 a having a curved portion 20 e, and the plate-shaped portion 30 is connected to the curved portion 20 e of the second light guide 20. Prism portions 32b and 32c are disposed at positions corresponding to the curved portions 20e. With this configuration, light that enters the plate-shaped portion 30 from the curved portion 20 e of the second light guide 20 can be diffused into the plate-shaped portion 30.

  In the vehicle light guide 100 according to the present embodiment, the prism portions 32b and 32c are provided in multiple stages in the up-down direction when the vehicle is mounted. With this configuration, light that enters the plate-shaped portion 30 from the curved portion 20e of the second light guide 20 can be more reliably diffused into the plate-shaped portion 30. The configuration of the prism portions 32b and 32c is not limited to the configuration provided in multiple stages in the up-down direction. For example, the prism portion 32b need not be provided, and it is sufficient that at least the prism portion 32c is provided.

  In the vehicular light guide 100 according to the present embodiment, the embossed portion 32a and the prism portions 32b and 32c are arranged on the front surface of the plate-shaped portion 30 in the vehicle mounted state. With this configuration, it is possible to suppress light that enters the plate-shaped portion 30 from the curved portion 20 e of the second light guide 20 from being emitted to the front of the plate-shaped portion 30.

  In the light guide 100 for a vehicle according to the present embodiment, the prism portions 32b and 32c are arranged along the longitudinal direction of the curved portion 20e. With this configuration, light that enters the plate-shaped portion 30 from the curved portion 20e of the second light guide 20 can be more reliably diffused into the plate-shaped portion 30.

  In the vehicle light guide 100 according to the present embodiment, the second light guide 20 has the other end 20d connected from above the plate-shaped portion 30 in the vehicle mounted state, and the prism portion 31a includes the plate-shaped portion. 30 is arranged at a position overlapping the connection portion on a rear surface opposite to the surface connected to the other end. In this configuration, the light traveling into the plate-shaped portion 30 from the other end 20d can be more reliably diffused into the plate-shaped portion 30 by the prism portion 31a.

  In the light guide 100 for a vehicle according to the present embodiment, the prism portion 31 a is arranged along the longitudinal direction of the first light guide 10. With this configuration, light traveling from the other end 20d into the plate-shaped portion 30 can be more reliably diffused into the plate-shaped portion 30.

  The vehicular lamp 200 according to the present invention includes the light source 50 and the above-described vehicular light guide 100 that guides light from the light source 50 and emits the light forward of the vehicle. Thus, the vehicular lamp 200 having an excellent appearance can be provided.

  The vehicle lighting device 200 according to the present embodiment includes a cover portion 130 that covers at least the distal end portion 20b of the second light guide 20 and the plate-shaped portion 30 when viewed from the front in a vehicle mounted state. With this configuration, the configuration of the connection portion between the second light guide 20 and the plate-shaped portion 30 can be made invisible. Thereby, the deterioration of appearance can be suppressed.

  The technical scope of the present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit of the present invention. For example, in the above embodiment, the configuration in which the plate-shaped portion 30 is connected to the side surface of the second light guide 20 on the side of the first light guide 10 over the entire length is described as an example. The configuration is not limited to this, and a configuration in which at least a part in the longitudinal direction is not connected may be used.

  Moreover, in the said embodiment, although the structure which provided the plate-shaped part 30 over the whole longitudinal direction of the 1st light guide 10 was described as an example, it is not limited to this, and it is not limited to this, but may be a part of longitudinal direction. A configuration may be provided.

  Further, in the above-described embodiment, the configuration in which the distal end portion 20 b is tapered toward the plate-shaped portion 30 has been described as an example. May not change.

  Further, in the above embodiment, the configuration in which the first light source 51 is disposed so as to face one end 10 c of the first light guide 10 has been described as an example. A light source may be arranged to face the end 10d. Thereby, since light can be supplied to the first light guide 10 also from the other end 10d side, it is possible to further increase the illuminance.

  Further, in the above embodiment, the configuration in which the distal end portion 20b is connected to the front surface of the plate portion 30 has been described as an example. May be adopted. In this case, the prism portion 31a can be arranged on the front surface of the plate-shaped portion 30.

  Further, in the above-described embodiment, a configuration in which the cover 130 of the vehicular lamp 200 covers at least the distal end portion 20b of the second light guide 20 and the plate-shaped portion 30 when viewed from the front when mounted on the vehicle will be described. However, the configuration is not limited to this, and the cover 130 may be configured not to cover at least a part of the distal end portion 20 b of the second light guide 20 and the plate-shaped portion 30.

  Further, in the above embodiment, the configuration in which the vehicle light guide 100 extends in the left-right direction has been described as an example, but the present invention is not limited to this. FIG. 9 is a front view illustrating an example of a vehicle light guide 300 according to a modification. The vehicle light guide 300 shown in FIG. 9 includes a first light guide 210, a second light guide 220, and a plate portion 230. The light guide 300 for a vehicle shown in FIG. 9 has the first light guide 210, the second light guide 220, and the plate-like portion 230 whose ends on the light source 50 side are curved upward and rearward. The opposite end has a shape curved downward and forward.

  The first light guide 210 has a light source side curved portion 210e, a light source side linear portion 210f, a distal side curved portion 210g, and a distal side straight portion 210h. The light source side curved portion 210e has a shape curved upward and backward toward the end 210c on the light source 50 side. The light source side straight portion 210f connects the light source side curved portion 210e and the distal end side curved portion 210g in the left-right direction. The distal-side curved portion 210g has a shape curved downward and forward toward an end on the distal side opposite to the light source. The distal-side straight portion 210f extends downward and forward from the distal-side curved portion 210g. In FIG. 9, a part of the front-end-side linear portion 210f is not shown. The first light guide 210 has a first incident surface 211, a first prism part 212, and a first emission surface 213. The first prism portion 212 is formed, for example, in a concave shape recessed forward on the rear surface of the first light guide 210, but is not limited thereto, and protrudes, for example, on the rear side of the first light guide 10. It may be formed in a convex shape.

  The second light guide 220 has a base 220a and a tip 220b. The base 220a has a curved part 220e and a straight part 220f. The second light guide 220 has a shape in which the curved portion 220e is curved upward and backward toward the end 220c on the light source 50 side. The base 220a has a second incident surface 221, a second prism portion 222, and a second exit surface 223. The distal end portion 220b extends from the base portion 220a to the other end portion 220d toward the plate-like portion 230. The other end 220 d of the tip 220 b is connected to the plate 230 from above.

  The plate-shaped portion 230 has a light source side curved portion 230e and a distal end side curved portion 230g. The first portion 231 and the second portion 232 of the first light guide 210 correspond to the respective shapes of the first light guide 210 and the second light guide 220. Both have a shape in which the light source side is curved upward and backward.

  FIG. 10 is a diagram showing a configuration along a DD section in FIG. FIG. 10 shows a cross-sectional configuration of a plate-like portion 230 at a portion connecting the first light guide 210 and the second light guide 220. As shown in FIG. 10, the first portion 231 extends rearward from the upper part of the first light guide 210. Note that the first portion 231 may be in a state of being inclined upward toward the rear. The second portion 232 extends upward from the rear end of the first portion 231. Therefore, the plate-like portion 230 is formed in a substantially L shape by the first portion 231 and the second portion 232 in a DD cross-sectional view.

  The light source side curved portion 230e has a grain portion 232a and a prism portion 232c on the front surface of the second portion 232. The embossed portion 232a is provided over substantially the entire surface except for the flat portion 232d. The prism portion 232 c is provided at a boundary portion between the second portion 232 and the first portion 231, that is, at a lower end of the second portion 232. The prism portion 232c is provided along a boundary with the first portion 231, and a plurality of reflection surfaces are arranged side by side upward and rearward in accordance with the curvature of the light source side curved portion 230c. The prism part 232c diffuses the light that has entered the plate-shaped part 230 side in the curved part 220e among the light incident from the second incident surface 221 into the second part 232.

  As described above, the provision of the prism portion 232c suppresses the light that has entered the plate-shaped portion 230 from being emitted to the front of the plate-shaped portion 230. Further, as described above, the plate-like body 230 is arranged in a state where the first portion 231 extends rearward from the first light guide 210. With this configuration, for example, when light that has entered the plate-shaped portion 230 or light that has been diffused by the prism portion 232c enters the first portion 231 from the second portion 232 and travels forward, the first portion 231 Since the light is guided to the first light guide 231, the light is prevented from being emitted forward from the first portion 231. Accordingly, it is possible to suppress the light from being emitted forward from the plate-like body 230, and it is possible to suppress the occurrence of spotlight, color unevenness, and the like in the plate-like portion 230.

  The distal end curved portion 230g has a shape in which the distal end side of the first portion 231 is curved downward and forward so as to correspond to the shape of the distal end curved portion 210g of the first light guide 210. A prism portion 231a is provided on the rear surface side of the distal end side curved portion 230g. Since the prism portion 231a is provided on the rear surface side of the distal-side curved portion 210g, part of the light L2 reaching the rear surface of the first portion 231 of the plate-shaped portion 230 is rearward of the plate-shaped portion 230 at the distal-side curved portion 210g. Can be more reliably suppressed.

  L1, L2: light, 10, 210: first light guide, 10c, 10d, 20c, 20d, 210c, 220c, 220d: end, 10e, 20e, 220e: curved portion, 10f, 20f, 220f: linear portion Reference numerals: 11, 211: first incident surface, 12, 212: first prism portion, 13, 213: first emission surface, 20, 220: second light guide, 20a, 220a: base portion, 20b, 220b: distal end portion .., 21,221... Second incident surface, 22, 222... Second prism portion, 23,223... Second emitting surface, 30, 230 .. plate-like portion, 31,231... First portion, 31a, 32b, 32c,. 231a, 232c: prism portion, 32, 232: second portion, 32a, 232a: grain portion, 32d: flat portion, 50: light source, 51: first light source, 52: second light source, 51a, 52a: light emitting surface, 100, 30 ... Vehicle light guide, 110 ... Lamp housing, 120 ... Lamp lens, 130 ... Cover part, 131 ... First opening, 132 ... Second opening, 200 ... Vehicle lighting, 210e, 230c, 230e ... Light source side Curved portion, 210f: light source side linear portion, 210g, 230g: distal curved portion, 210h: distal linear portion

Claims (9)

It is rod-shaped, and light from the first light source enters from a first incident surface provided at one end in the longitudinal direction, guides the incident light, and is provided on a front side surface in a vehicle mounted state. A first light guide that exits from the exit surface;
It is rod-shaped, and light from the second light source enters from a second incident surface provided at one end in the longitudinal direction, guides a part of the incident light, and is provided on a front side surface in a vehicle mounted state. A second light guide having a base that emits light from a second emission surface to be provided, and a tip that guides the light that has passed through the base to the other end in the longitudinal direction;
The second light guide is connected to a side surface of the first light guide and provided along the longitudinal direction of the first light guide, the other end of the second light guide is connected, and A plate-shaped portion capable of guiding the light to the first light guide,
The light guide for a vehicle, wherein the plate-shaped portion includes a light diffusion portion that diffuses the light from the second light source into the plate-shaped portion. In the second light guide, the base has a curved portion,
The plate-shaped portion has a portion connected to the curved portion of the second light guide,
The vehicle light guide according to claim 1, wherein the light diffusing unit is disposed at a position corresponding to the curved portion. The vehicle light guide according to claim 2, wherein the light diffusion unit is provided in multiple stages in a vertical direction when the vehicle is mounted. The vehicle light guide according to claim 2, wherein the light diffusing portion is disposed on a front surface of the plate-shaped portion in a vehicle mounted state. The vehicle light guide according to any one of claims 2 to 4, wherein the light diffusing unit is disposed along a longitudinal direction of the curved portion. In the second light guide, the other end of the distal end is connected from above the plate-shaped portion in a vehicle mounted state,
The light diffusion part is arranged at a position overlapping the connection part on a surface on a side opposite to a surface connected to the other end of the front surface and the rear surface of the plate-shaped portion. The light guide for a vehicle according to any one of claims 1 to 5. The vehicle light guide according to claim 6, wherein the light diffusion unit is arranged along a longitudinal direction of the first light guide. Light source,
The vehicular lamp comprising: the vehicle light guide according to any one of claims 1 to 3, which guides light from the light source and emits the light toward the front of the vehicle. The vehicle lighting device according to claim 8, further comprising a cover that covers at least the distal end portion of the second light guide and the plate-shaped portion when viewed from the front in a vehicle mounted state.

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