JP2020024792A - Vehicle lighting device - Google Patents

Abstract

To provide a vehicle lighting device which has a light emitting part attached to a headlight and enables light from the light emitting part to be emitted to an area in front of a vehicle while achieving high aesthetic quality and high visibility.SOLUTION: A lighting device 2 is provided at a front part of a vehicle. The lighting device 2 includes a headlight 5, a light guide 12, and outer glass 13. The outer glass 13 is formed by integrally forming a side periphery part 13b and a front surface part 13c. The side periphery part 13b has an incident part 13d, into which light emitted from the light guide 12 enters, at a middle part in a longitudinal direction. The light guide 12 is disposed close to the incident part 13d. The light entering from the light guide 12 to the side periphery part 13b is guided to the front side while being reflected by inner and outer peripheral surfaces repeatedly to be emitted forward from an emission part 13e at the front.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a lighting device for a vehicle, and more particularly, to a lighting device including a headlight provided in a front portion of a vehicle and a light emitting unit attached to the headlight.

  In a vehicle such as an automobile, a headlight is provided at a front portion. In recent years, vehicles provided with a light-emitting unit attached to a headlight have been developed.

  For example, Patent Literature 1 discloses an illumination device in which a headlight and a daytime running lamp attached to the headlight are housed in a housing. The illumination device disclosed in Patent Document 1 employs a configuration in which a daytime running lamp includes a rod-shaped light guide and a light source that emits light to the light guide.

  In the lighting device disclosed in Patent Document 1, light is emitted from a light guide in a housing by driving a light source to emit light, and the emitted light passes through outer glass on the front side of the housing and is emitted toward the front of the vehicle. It is supposed to be.

JP 2018-32512 A

  However, in the lighting device disclosed in Patent Literature 1, since the light from the daytime running lamp housed in the housing passes through the outer glass and is emitted forward, there is room for improvement in design. That is, the daytime running lamp emits light in the housing, and the emitted light is radiated forward through the outer glass, and it is difficult to achieve high designability.

  Further, in the lighting device disclosed in Patent Literature 1, since the daytime running lamp shines behind the outer glass, there is room for improvement from the viewpoint of visibility from the front of the vehicle. That is, in the lighting device disclosed in Patent Document 1, a vehicle ahead of the vehicle, a vehicle running opposite to the vehicle, and a pedestrian in front of the vehicle are illuminated by daytime shining behind the outer glass. The running lamp is visually recognized, and the visibility is low.

  The present invention has been made to solve the above-described problems, and has a light emitting portion attached to a headlight, and emits light from the light emitting portion with high designability and high visibility. It is an object of the present invention to provide a vehicle lighting device that can emit light to the front of a vehicle.

  A vehicle lighting device according to one embodiment of the present invention is a vehicle lighting device provided in a front portion of a vehicle, and covers a headlight capable of irradiating light in front of the vehicle, and covers a front of the headlight. A light-transmitting outer glass having a front surface portion and a side peripheral portion surrounding the side periphery, a light source portion different from the headlight, and a part of the side peripheral portion of the outer glass. A light guide that is provided in contact with or in proximity to the light source, and that receives light emitted from the light source unit, guides the light, and emits the light to the side periphery.

  In the vehicle lighting device according to the above aspect, when the light source is driven to emit light, the light emitted from the light source is incident on the side peripheral portion of the outer glass via the light guide. Then, since the outer glass has a light transmitting property, the incident light is guided inside the side peripheral portion, and at least a part thereof is emitted toward the front side of the vehicle.

  Therefore, in the vehicle lighting device according to the above aspect, since light is emitted from the side peripheral portion of the outer glass itself, compared with the technology disclosed in Patent Document 1, the light from the light emitting unit attached to the headlight is emitted. It can be projected forward of the vehicle with high design and high visibility.

  In the vehicle lighting device according to the above aspect, the light guide has a ring shape surrounding the headlight, and the side peripheral portion of the outer glass has a cylindrical shape, and has a cylindrical shape. A ring-shaped incident portion for receiving light emitted from the light guide may be provided in a middle portion, and a part of the side peripheral portion may be the incident portion.

  In the case where the above configuration is employed, the light guide is in contact with or close to the incident portion provided in the middle part of the cylinder in the cylinder axis direction, and the shape of the light guide ( Since the shape of the incident portion on the side peripheral portion is a ring shape in accordance with the (ring shape), the light emitted from the light guide can be efficiently incident on the side peripheral portion of the outer glass.

  In the vehicle lighting device according to the above aspect, the side peripheral portion has, at an end on the front side of the side peripheral portion, an emission portion that emits the guided light forward around the front surface portion. , Can also be.

  In the case where the above configuration is adopted, light can be emitted from a more front side of the vehicle by providing an emission portion at a front end portion of the side peripheral portion, thereby achieving high designability. Is superior to

  In the vehicle lighting device according to the above aspect, the outer glass is formed by integrally forming the front surface portion and the side peripheral portion, and the emission portion is formed by a connecting portion between the front surface portion and the side peripheral portion. May also be provided on the front side.

  In the case of adopting the above-described configuration, the emission portion is disposed on the outer glass in front of the connection portion between the front surface portion and the side peripheral portion, so that the light source portion can pass through the light guide and the side peripheral portion. This makes it possible for the light to be more clearly recognized, which is advantageous for realizing high designability.

  In the case where the above-described configuration is adopted, the outer glass is formed integrally with the front surface and the side periphery to prevent light from being irregularly reflected between the front surface and the side periphery. It can be suppressed, and higher designability can be realized.

  In the vehicle lighting device according to the above aspect, the rear side portion of the light guide includes a reflecting portion that reflects the light guided with an uneven structure toward the front, The height of the unevenness may gradually change along the longitudinal direction of the light guide.

  In the case of adopting the above-described configuration, by providing the reflecting portion having the concave-convex structure on the back surface of the light guide, it is possible to more efficiently emit the light guided through the light guide forward. .

  When the above configuration is employed, the height of the light emitted in the longitudinal direction is made uniform or gradually changed by gradually changing the height of the unevenness in the longitudinal direction of the light guide. Is possible, and higher designability can be realized.

  In the vehicle lighting device according to the above aspect, when the light guide is the first light guide, a part of light emitted from the light source unit is provided outside the outer glass through the outer glass. It may further include a second light guide that enters and emits the incident light while guiding the light.

  In the case where the above configuration is adopted, a second light guide that emits a part of the light emitted from the light source unit is also provided, so that a plurality of headlights can be provided without increasing the sum of the light sources. Can be provided, and a higher design property can be realized.

  The vehicle lighting device according to the above aspect has the light emitting portion attached to the headlight, and can emit the light from the light emitting portion to the front of the vehicle with high design and high visibility.

1 is a schematic front view illustrating a front configuration of a vehicle according to an embodiment. FIG. 5 is a schematic front view showing an arrangement relationship between the lighting device and the signature wing. FIG. 3 is a schematic diagram schematically showing a part A in FIG. 2 in an enlarged manner. FIG. 4 is a diagram illustrating a cross section taken along line IV-IV of FIG. 2 and is a schematic cross-sectional view illustrating an internal configuration of the lighting device. FIG. 2 is a schematic front view showing a configuration of a light guide disposed so as to surround a headlight. It is a schematic cross section which shows the optical path of the light emitted from the ring-shaped light guide. FIG. 4 is a schematic rear view illustrating a configuration of a ring-shaped light guide. 7A is a schematic cross-sectional view showing a cross-sectional configuration of a portion B in FIG. 7, FIG. 7B is a schematic cross-sectional view showing a cross-sectional configuration of a portion C in FIG. 7, and FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment described below is an example of the present invention, and the present invention is not limited to the following embodiment except for its essential configuration.

  In the drawings used in the following description, "FR" is ahead of the vehicle (traveling direction), "RE" is behind the vehicle, "LE" is left of the vehicle, "RI" is right of the vehicle, "UP" "" Indicates above the vehicle, and "LO" indicates below the vehicle.

[Embodiment]
1. Configuration of Vehicle Front 1a The configuration of the vehicle front 1a of the vehicle 1 according to the embodiment will be described with reference to FIG.

  As shown in FIG. 1, a recessed portion 1 b that is recessed toward the vehicle rear side is provided at an end portion in the vehicle width direction (the left side portion in FIG. 1) of a vehicle front portion 1 a of the vehicle 1. The concave portion 1b has a shape that is elongated in the lateral direction from the center in the vehicle width direction toward the vehicle side portion 1c when viewed from the front of the vehicle 1.

  An illumination device 2 and a signature wing 3 are provided in a deep portion (a deep portion in FIG. 1) of the concave portion 1b. The signature wing 3 has a plate-shaped wing portion extending elongated along the concave portion 1b. The signature wing 3 is formed so as to extend outward from the depth side of the concave portion 1b (to the front side of the vehicle 1).

2. Arrangement Configuration of Illumination Device 2 and Signature Wing 3 The arrangement configuration of the illumination device 2 and signature wing 3 will be described with reference to FIGS. 2 and 3. FIG. 2 is a schematic front view showing an arrangement configuration of the lighting device 2 and the signature wing 3, and FIG. 3 is a schematic diagram schematically showing an A portion of FIG. 2 in an enlarged manner.

  As shown in FIG. 3, the lighting device 2 according to the present embodiment includes a headlight 5, a ring light emitting unit 6, and a wing light emitting unit 4. Then, as shown in FIGS. 2 and 3, a part on the periphery of the ring light emitting unit 6 is covered on the front side by the tip 3 a of the signature wing 3.

  The headlight 5 has a substantially circular external shape when viewed from the front. The ring light emitting section 6 is formed in a ring shape so as to surround the outer periphery of the headlight 5 in a front view.

  On the other hand, the wing light emitting portion 4 is provided along the front end portion of the signature wing 3 (the peak portion most protruding forward of the vehicle 1).

  Note that the ring light emitting unit 6 and the wing light emitting unit 4 in the present embodiment are light emitting units attached to the headlight 5 respectively.

3. Internal Configuration of Lighting Apparatus 2 The internal configuration of the lighting apparatus 2 will be described with reference to FIG. FIG. 4 is a schematic sectional view showing a section taken along line IV-IV of FIG.

  As shown in FIG. 4, the lighting device 2 has a headlight 5 in a lamp room 2a. A heat sink 7 for radiating heat generated when the headlight 5 is turned on to the outside is provided in a rear portion of the headlight 5. A part of the heat sink 7 extends rearward from the lamp room 2a.

  The light room 2a is an inner space of the housing 18 configured by combining the outer glass 13 and the rear case 14. The outer glass 13 has a bottomed cylindrical shape, and covers the front surface and the side peripheral surface of the headlight 5. Note that the heat sink 7 extends rearward through an opening 14 a provided in the rear case 14.

  Here, the gap between the rear case 14 and the heat sink 7 is closed by an elastically deformable seal member 15.

  A ring-shaped light guide 12 is also provided in the lamp room 2 a so as to surround the outer periphery of the headlight 5. The light guide 12 corresponds to a first light guide. In the lamp room 2a, a light source unit 8 including one or a plurality of semiconductor light-emitting elements (for example, LED chips) is provided, and the light source unit 8 is disposed in contact with or close to the light source unit 8. , A light guide 9 extending linearly forward, and a light guide 11 connecting the light guide 9 and the light guide 12 are also provided.

  As shown in the enlarged portion of FIG. 4, the lighting device 2 also has a light guide 10. The light guide 10 corresponds to a second light guide, and has an end face facing the end face of the light guide 9 with the interposed portion 13a of the outer glass 13 interposed therebetween. Part of the light from the light source unit 8 passes through the outer glass 13 and is guided from the light guide 9 to the light guide 10.

  Here, the ring light emitting section 6 is constituted by a light guide 12, and the wing light emitting section 4 is constituted by a light guide 10. The light guide 10 extends along the front end of the signature wing 3, and guides the light guided from the light guide 9 along the front end of the signature wing 3, while guiding the light guided along the front end of the signature wing 3. Emit light to

4. Configuration of Light Guides 9, 11, 12 The configuration of the light guides 9, 11, 12 will be described with reference to FIG. FIG. 5 is a schematic front view showing the configuration of the light guides 9, 11, and 12.

  As shown in FIG. 5, the light guide 11 is provided in a state of being branched (connected) from the light guide 9 extending forward from the rear side of the lighting device 2 to the front side.

  The light guide 11 has two branch portions 11a and 11b. The first branch portion 11a, which is one of the two branch portions 11a and 11b, is connected to one side (clockwise side) of the ring-shaped light guide 12 in the circumferential direction so that light can be guided. ing.

  On the other hand, the second branch portion 11b, which is the other of the two branch portions 11a and 11b, can guide the light to the other circumferential side (counterclockwise side) of the ring-shaped light guide 12. It is connected to the.

  As described above, the connection portion between the light guide 9 and the first branch portion 11a and the second branch portion 11b, and the connection portion between the first branch portion 11a and the second branch portion 11b to the light guide 12 are the signature wing 3 The front side is covered by the wing tip 3a.

5. Light Emitting Form of Ring Light Emitting Unit 6 A light emitting form of the ring light emitting unit 6 will be described with reference to FIG. FIG. 6 is a schematic cross-sectional view showing an optical path of light emitted from the light guide 12 toward the front side.

  As shown in FIG. 6, as described above, the outer glass 13 is formed by integrally forming the side peripheral portion 13b and the front surface portion 13c. In the lamp room 2 a, the light guide 12 is provided so as to surround the headlight 5 with a gap left from the headlight 5. The light guide 12 is supported by a guide support 17 provided along the inside of the side peripheral portion 13b of the outer glass 13.

  The outer peripheral portion 13 b of the outer glass 13 has a part of the outer periphery covered with the outer case 16. The outer peripheral portion of the outer peripheral portion 13b of the outer peripheral portion 13b is covered by the outer case 16 in a portion on the front side with respect to the portion where the light guide 12 is disposed in the lamp room 2a.

  Next, the light guided in the light guide 12 is emitted forward from the entire circumferential direction of the light guide 12. The light emitted from the light guide 12 toward the front side is guided from the incident portion 13d of the outer glass 13 facing the front side of the light guide 12 to the inside of the side peripheral portion 13b of the outer glass 13.

  Inside the side peripheral portion 13b of the outer glass 13, as shown by a broken line, the light is guided forward while repeating reflection on the inner and outer peripheral surfaces in the radial direction of the side peripheral portion 13b. Then, the guided light is emitted toward the front of the vehicle 1 from an emission portion 13e which is a front end of the side peripheral portion 13b of the light glass 13 (EL).

  In the illumination device 2 according to the present embodiment, the emission portion 13e of the side peripheral portion 13b is provided so as to protrude forward from a connection point between the side peripheral portion 13b and the front surface portion 13c. For this reason, the light guided inside the side peripheral part 13b is emitted from the emission part 13e in front of the connection point between the side peripheral part 13b and the front part 13c.

  Here, in FIG. 6, a partial cross section of the lighting device 2 is extracted and shown, but the configuration of the light guide 12 and the side peripheral portion 13b is the same in the entire circumferential direction.

6. Configuration of Reflection Unit 12a in Light Guide 12 The configuration of the reflection unit 12a in the light guide 12 will be described with reference to FIGS. FIGS. 7A and 7B are schematic rear views showing the configuration of the light guide 12 from the rear side. FIGS. 8A and 8B are cross-sectional configurations of a B portion, FIG. 8B is a cross-sectional configuration of a C portion, and FIG. FIG. 2 is a schematic cross-sectional view showing a cross-sectional configuration of FIG.

  As shown in FIG. 7, on the rear side portion of the light guide 12 in the present embodiment, a reflecting portion 12a having an uneven structure is provided along the circumferential direction.

  As shown in FIG. 8A, in the portion B adjacent to the location where the first branch portion 11a and the second branch portion 11b are connected, the height of the unevenness of the reflection portion 12a is H1. On the other hand, the height of the unevenness of the reflecting portion 12a at the portion C remote from the connection point is H2, and the height of the unevenness of the reflecting portion 12a at the portion D farther away is H3. H1, H2, and H3 satisfy the following relationship.

H1 <H2 <H3 (Equation 1)
As an example, H2 is two to three times H1 and H3 is three to four times H1.

  In the light guide 12 according to the present embodiment, the intensity of light emitted toward the front side is increased in the circumferential direction of the light guide 12 by providing the reflecting portion 12a having a gradually changing height in the circumferential direction on the rear side portion. The adjustment can be made substantially the same.

7. Effect In the lighting device 2 according to the present embodiment, when the light source unit 8 emits light, the light emitted from the light source unit 8 enters the side peripheral portion 13b of the outer glass 13 via the light guides 9, 11, and 12. Is done. Since the outer glass 13 has a light transmitting property, the light incident from the incident portion 13d is guided inside the side peripheral portion 13b, and is emitted from the emission portion 13e toward the front side of the vehicle 1.

  Therefore, in the lighting device 2 according to the present embodiment, since the light is emitted from the side peripheral portion 13b of the outer glass 13, the ring light emitting portion attached to the headlight 5 is compared with the technology disclosed in Patent Document 1 described above. The light from No. 6 can be emitted forward of the outer glass 13 with high designability and high visibility.

  In the lighting device 2 according to the present embodiment, the light guide 12 is in a state in which the light guide 12 is close to the incident portion 13d provided at a middle portion in the front-rear direction (the cylinder axis direction) of the side peripheral portion 13b of the outer glass 13. Since the shape of the incident portion 13d in the side peripheral portion 13b is formed in a ring shape in accordance with the shape (ring shape) of the light guide 12, light emitted from the light guide 12 can be efficiently transmitted to the outer glass 13 side. The light can be incident on the peripheral portion 13b.

  It is also possible to adopt a form in which the light guide 12 is in contact with the incident portion 13d of the outer glass 13.

  In the lighting device 2 according to the present embodiment, by providing the emission portion 13e at the front end of the side peripheral portion 13b of the outer glass 13, light can be emitted from the front side of the vehicle 1 and a high design can be achieved. It is superior in realizing sexuality.

  In the illumination device 2 according to the present embodiment, the emission portion 13e is disposed on the outer glass 13 at a position forward of the connection portion between the side peripheral portion 13b and the front surface portion 13c, so that the light source unit 8 transmits the light guides 9 and 11 to the outer glass 13. , 12 and the light passing through the side peripheral portion 13b of the outer glass 13 can be more clearly recognized, which is advantageous for realizing high designability.

  Further, in the illumination device 2 according to the present embodiment, by forming the side peripheral portion 13b and the front surface portion 13c integrally in the outer glass 13, irregular reflection of light or the like occurs at a connection point between the side peripheral portion 13b and the front surface portion 13c. Can be suppressed, and higher designability can be realized.

  In the lighting device 2 according to the present embodiment, by providing the reflecting portion 12a having the uneven structure on the rear side portion of the light guide 12, the light guided inside the light guide 12 can be emitted forward with higher efficiency. It becomes possible.

  Further, in the lighting device 2 according to the present embodiment, as described with reference to FIG. 8, the height of the concave-convex structure forming the reflecting portion 12a is gradually changed in the longitudinal direction (circumferential direction) of the light guide. The intensity of the emitted light in the longitudinal direction can be made uniform or gradually changed, and higher designability can be realized.

  In the lighting device 2 according to the present embodiment, the light guide 10 that is provided outside the housing 18 and emits light by entering a part of the light emitted from the light source unit 8 is also provided. In addition, the light emitting portions 4 and 6 attached to the headlight 5 can be provided, and higher designability can be realized.

  As described above, the lighting device 2 according to the present embodiment has the light emitting unit 6 attached to the headlight 5 and emits light from the light emitting unit 6 to the vehicle 1 with high designability and high visibility. Can be fired forward.

[Modification]
In the lighting device 2 according to the above-described embodiment, as a light emitting unit attached to the headlight 5, a ring light emitting unit 6 including a light guide 12 provided so as to surround the headlight 5 and a front end of the signature wing 3 And a wing light emitting portion 4 including a light guide 10 extending linearly inward in the vehicle width direction, but the present invention is not limited to this. For example, a configuration including only the ring light emitting unit 6 may be employed.

  Further, in the present invention, the light guide 12 does not necessarily have to surround the entire periphery of the headlight 5, and a configuration that partially surrounds the headlight 5 or a configuration that does not surround the periphery can be adopted.

  In the lighting device 2 according to the embodiment, the light source unit configured with one or more LED elements is adopted as the light source unit 8 of the ring light emitting unit 6 and the wing light emitting unit 4. Is not limited to this. For example, an organic EL element, an inorganic EL element, a semiconductor laser element, or the like can be employed as the light source unit.

  In the lighting device 2 according to the above embodiment, when the light source unit 8 is driven to emit light, both the ring light emitting unit 6 and the wing light emitting unit 4 emit light. However, the present invention is not limited to this. It does not receive. For example, an optical shutter is provided between the light source unit and the first light guide or between the light source unit and the second light guide to selectively emit light from the first light emitting unit and the second light emitting unit. Is also possible.

  In the lighting device 2 according to the embodiment, the light source of the headlight 5 is not particularly mentioned, but various light sources can be adopted. For example, a semiconductor light emitting element such as an LED, an inorganic EL element, an organic EL element, a semiconductor laser element, or the like can be employed, or a halogen bulb, a high-intensity discharge lamp, or the like can be employed.

  In the lighting device 2 according to the embodiment, the wavelength of the light emitted from the light source unit 8 is not particularly described, but only the light of a predetermined wavelength (for example, the wavelength that becomes orange) is emitted. Alternatively, light of different wavelengths (for example, a wavelength that becomes white and a wavelength that becomes orange) can be emitted by adjusting an applied voltage or the like.

  In addition, the light emission from the light source unit may be intermittent, and the plurality of light emitting units or some of the light emitting units may blink.

  In the lighting device 2 according to the above embodiment, the outer glass 13 employs a configuration in which the side peripheral portion 13b and the front surface portion 13c are integrally formed, but the present invention is not limited to this. Absent. For example, the outer peripheral glass may be formed by manufacturing the side peripheral portion and the front portion as separate components and joining or engaging each other.

DESCRIPTION OF SYMBOLS 1 Vehicle 1a Vehicle front part 2 Lighting device 5 Headlight 6 Ring light emitting part 8 Light source part 9 Light guide 10 Light guide (second light guide)
11 light guide 12 light guide (first light guide)
13 Outer glass 13b Peripheral portion 13d Incident portion 13e Emitting portion

Claims (6)

A vehicle lighting device provided at a front portion of a vehicle,
A headlight capable of emitting light in front of the vehicle,
An outer glass having a light-transmitting outer glass having a front surface portion covering the front of the headlight and a side peripheral portion surrounding a side periphery,
A light source unit different from the headlight,
The outer glass is provided in a state of being in contact with or close to a part of the side peripheral portion, and receives light emitted from the light source unit, and emits the light to the side peripheral portion while guiding the light. A light guide,
Comprising,
Lighting equipment for vehicles. The vehicle lighting device according to claim 1,
The light guide has a ring shape surrounding the headlight,
The side peripheral portion of the outer glass has a cylindrical shape, and has a ring-shaped incident portion for receiving light emitted from the light guide in a middle portion in a cylindrical axial direction,
Part of the side peripheral portion is the incident portion,
Lighting equipment for vehicles. The vehicle lighting device according to claim 2,
The side peripheral portion has, at an end on the front side of the side peripheral portion, an emission portion that emits the guided light forward around the front surface portion.
Lighting equipment for vehicles. The vehicle lighting device according to claim 3,
The outer glass is formed by integrally forming the front portion and the side peripheral portion,
The emission unit is provided on a front side of a connection point between the front surface part and the side peripheral part,
Lighting equipment for vehicles. The vehicle lighting device according to any one of claims 1 to 4,
On the back side of the light guide, the light guide has a reflecting portion that reflects the light that has been guided toward the front with an uneven structure,
The height of the unevenness of the reflecting portion is gradually changed along the longitudinal direction of the light guide,
Lighting equipment for vehicles. The lighting device for a vehicle according to any one of claims 1 to 5,
When the light guide is a first light guide,
A second light guide that is provided outside the outer glass and that receives a part of the light emitted from the light source unit through the outer glass and guides the incident light while emitting the light; ,
Lighting equipment for vehicles.