CN114651151A - Lamp unit and vehicle lamp - Google Patents

Lamp unit and vehicle lamp Download PDF

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Publication number
CN114651151A
CN114651151A CN202180006332.9A CN202180006332A CN114651151A CN 114651151 A CN114651151 A CN 114651151A CN 202180006332 A CN202180006332 A CN 202180006332A CN 114651151 A CN114651151 A CN 114651151A
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CN
China
Prior art keywords
unit
light
low
emitting element
beam illumination
Prior art date
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Granted
Application number
CN202180006332.9A
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Chinese (zh)
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CN114651151B (en
Inventor
松本昭则
市川知幸
佐藤正和
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Koito Manufacturing Co Ltd
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Koito Manufacturing Co Ltd
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Publication date
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Publication of CN114651151A publication Critical patent/CN114651151A/en
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Publication of CN114651151B publication Critical patent/CN114651151B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/155—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having inclined and horizontal cutoff lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The lamp unit (3) is provided with: a first low-beam illumination unit (7a) configured to emit a first low-beam light distribution pattern having a horizontal cutoff line; a second low-beam illumination unit (7d) configured to emit a second low-beam light distribution pattern having an inclined cutoff line; and high-beam illumination units (7b, 7c) that are disposed between the first low-beam illumination unit (7a) and the second low-beam illumination unit (7d), and that are configured to emit a high-beam light distribution pattern. The first low-beam illumination unit (7a), the high-beam illumination units (7b, 7c), and the second low-beam illumination unit (7d) are arranged side by side in the lateral direction of the lamp unit (3).

Description

Lamp unit and vehicle lamp
Technical Field
The present disclosure relates to a lamp unit and a vehicle lamp equipped with the lamp unit.
Background
Patent document 1 discloses a left side vehicle lamp equipped with a left side lamp unit and a right side vehicle lamp equipped with a right side lamp unit.
Documents of the prior art
Patent document
Patent document 1: japanese unexamined patent application publication No. 2014-078477
Disclosure of Invention
Problems to be solved by the invention
In the left side vehicle lamp and the right side vehicle lamp disclosed in patent document 1, it is necessary to manufacture a left side lamp unit mounted on the left side vehicle lamp and a right side lamp unit mounted on the right side vehicle lamp, respectively. Since it is necessary to manufacture two different lamp units for the left side vehicle lamp and the right side vehicle lamp in this way, the manufacturing costs of the lamp units and the vehicle lamps increase. From the above-described points, there is room for research on a method for reducing the manufacturing cost of a lamp unit and a vehicle lamp.
The purpose of the present disclosure is to reduce the manufacturing cost of a lamp unit and a vehicle lamp.
Means for solving the problems
A lamp unit according to an aspect of the present disclosure includes:
a first low-beam illumination unit configured to emit a first low-beam light distribution pattern having a first cutoff line;
a second low-beam illumination unit configured to emit a second low-beam light distribution pattern having a second cutoff line; and
and a high beam illumination unit disposed between the first low beam illumination unit and the second low beam illumination unit, and configured to emit a high beam light distribution pattern.
The first low-beam illumination unit, the second low-beam illumination unit, and the high-beam illumination unit are arranged side by side in a first direction.
According to the above configuration, the high beam illumination unit is disposed between the first low beam illumination unit and the second low beam illumination unit. Therefore, when the low-beam light distribution pattern is emitted from the vehicle, the first low-beam illumination unit and the second low-beam illumination unit are turned on, while the high-beam illumination unit is turned off. In this way, the appearance of the lamp unit in the low beam outgoing state is bilaterally symmetric about the predetermined position of the lamp unit.
Therefore, when the same lamp unit is mounted on the left and right vehicle lamps, the appearance of the left and right vehicle lamps in the low beam emitting state is substantially the same, and therefore the same lamp unit can be applied to both the left and right vehicle lamps. In this way, it is not necessary to manufacture two different lamp units for the left side vehicle lamp and the right side vehicle lamp, respectively, and the manufacturing cost of the lamp units can be reduced.
Effects of the invention
According to the present disclosure, the manufacturing cost of the lamp unit and the vehicle lamp can be reduced.
Drawings
Fig. 1 is a front view of a vehicle.
Fig. 2 is a longitudinal sectional view of the left side vehicle lamp.
Fig. 3 is a perspective view of the lamp unit.
Fig. 4 is a front view of the lamp unit.
Fig. 5 is a cross-sectional view showing the heat sink, the circuit board, the light emitting element, and the inner lens.
Fig. 6 is a cross-sectional view showing the lens unit of the first low beam illumination unit in an enlarged manner.
Fig. 7 (a) is a front view schematically showing the first low-beam illumination unit. Fig. 7 (b) is a front view schematically showing the high beam illumination unit. Fig. 7 (c) is a front view schematically showing the second low-beam illumination unit.
Fig. 8 (a) is a view schematically showing a light distribution pattern formed on a virtual screen when low beams are emitted. Fig. 8 (b) is a view schematically showing a light distribution pattern formed on a virtual screen when a high beam is emitted.
Fig. 9 is a diagram schematically showing the electrical connection relationship between the light emitting elements of the lighting unit.
Fig. 10 (a) is a diagram for explaining the relationship between the lighting timing of the high beam illumination unit and the turning-off timing of the second low beam illumination unit. Fig. 10 (b) is a diagram for explaining the relationship between the turn-off timing of the high beam illumination unit and the turn-on timing of the second low beam illumination unit.
Detailed Description
Hereinafter, an embodiment of the present invention (hereinafter, referred to as the present embodiment) will be described with reference to the drawings. The dimensions of the respective members shown in the drawings may be different from the actual dimensions of the respective members for the convenience of description.
In the description of the present embodiment, for the sake of convenience of description, the terms "left-right direction", "up-down direction", and "front-back direction" may be appropriately mentioned. These directions are relative directions set for the lamp unit 3 shown in fig. 3. Here, the "left-right direction" is a direction including the "left direction" and the "right direction". The "up-down direction" is a direction including the "up direction" and the "down direction". The "front-rear direction" is a direction including the "front direction" and the "rear direction". One of the left-right direction, the up-down direction, and the front-back direction is orthogonal to the remaining two directions.
In the present embodiment, the "horizontal direction" is a direction perpendicular to the vertical direction (vertical direction), and includes the left-right direction and the front-rear direction. In the description of the present embodiment, the direction (left-right direction, up-down direction, front-back direction) set for the lamp unit 3 is assumed to coincide with the direction (left-right direction, up-down direction, front-back direction) set for the vehicle 1 and the left vehicle lamp 2L.
First, a vehicle 1 according to the present embodiment will be described with reference to fig. 1. Fig. 1 is a front view of a vehicle 1 provided with a left side vehicle lamp 2L and a right side vehicle lamp 2R. As shown in fig. 1, a left side vehicle lamp 2L is disposed on the left front side of the vehicle 1, and a right side vehicle lamp 2R is disposed on the right front side of the vehicle 1. The same lamp unit 3 is mounted on each of the left side vehicle lamp 2L and the right side vehicle lamp 2R.
Next, the left side vehicle lamp 2L will be described with reference to fig. 2. Further, the structure of the left side vehicle lamp 2L is substantially the same as that of the right side vehicle lamp 2R, and therefore, the description of the right side vehicle lamp 2R is omitted. Fig. 2 shows a longitudinal sectional view of the left side vehicle lamp 2L. As shown in fig. 2, the left vehicle lamp 2L includes a lamp housing 12, a globe 14 that covers an opening of the lamp housing 12, and a lamp unit 3. The lamp unit 3 is disposed in a lamp chamber S formed by the lamp housing 12 and the lamp cover 14.
Next, the structure of the lamp unit 3 will be specifically described with reference to fig. 3 to 5. Fig. 3 is a perspective view of the lamp unit 3. Fig. 4 is a front view of the lamp unit 3. Fig. 5 is a cross-sectional view showing the heat sink 6, the circuit board 8, the light emitting elements 5a to 5d, and the inner lens 4 in the lamp unit 3. As shown in fig. 3 to 5, the lamp unit 3 includes a heat sink 6, a bracket 9, a circuit board 8, light emitting elements 5a to 5d, and an inner lens 4. Hereinafter, for convenience of description, the light emitting elements 5a to 5d may be collectively referred to as the light emitting elements 5.
The heat sink 6 is configured to release heat emitted from the light emitting element 5 into the air in the lamp chamber S. The heat sink 6 is formed by, for example, extrusion molding of an aluminum plate. The bracket 9 is formed of a resin material such as polycarbonate, nylon, or the like, and has a first bracket portion 9a and a second bracket portion 9b that are completely separated from each other.
The first bracket portion 9a is fixed to the heat sink 6 on one end side of the heat sink 6, and is connected to an alignment screw 92 functioning as an optical axis adjusting mechanism and a fulcrum screw 95 functioning as a fulcrum mechanism (see fig. 4). The calibration screw 92 is configured to adjust the optical axis Ax of the lamp unit 3 in the vertical direction. The second bracket portion 9b is fixed to the heat sink 6 on the other end side of the heat sink 6, and is connected to an alignment screw 93 (see fig. 4) functioning as an optical axis adjusting mechanism. The alignment screw 93 is configured to adjust the optical axis Ax of the lamp unit 3 in the horizontal direction.
The circuit board 8 is disposed on the front surface 60 of the heat sink 6. The circuit board 8 is electrically connected to a power supply circuit not shown. In this regard, the power supply circuit may be mounted on the circuit board 8. The light emitting elements 5a to 5d are disposed on the circuit board 8, and are electrically connected to a light source driving circuit, not shown, via the circuit board 8. The light emitting element 5 is, for example, a semiconductor light emitting element such as an LED. The light emitting element 5 is configured to emit white light to the outside, and may include, for example, a blue LED and yellow fluorescent light. The light emitting elements 5a to 5d are arranged along the same line in the left-right direction (an example of the first direction). The light emitting element 5b constituting the high beam illumination unit 7b and the light emitting element 5c constituting the high beam illumination unit 7c are arranged between the light emitting element 5a constituting the first low beam illumination unit 7a and the light emitting element 5d constituting the second low beam illumination unit 7d in the left-right direction.
The light emitting elements 5a to 5c are disposed on the circuit board 8 such that the lower ends thereof are parallel to the left-right direction, and the light emitting element 5d is disposed on the circuit board 8 such that the lower end thereof is inclined to the left-right direction. Since the lower end of the light-emitting element 5d is inclined with respect to the left-right direction, the second low-beam illumination unit 7d can form a low-beam light distribution pattern P2 (an example of a second low-beam light distribution pattern) having an inclined cutoff line L2 (an example of a second cutoff line), as will be described later (see fig. 8 (a)).
The inner lens 4 is disposed on the front surface 60 of the heat sink 6 so as to cover the light emitting elements 5a to 5 d. The inner lens 4 is made of a transparent resin material such as polycarbonate or acrylic. The inner lens 4 has lens units 40a to 40d aligned in the left-right direction. The lens units 40a to 40d are integrally formed.
As shown in fig. 5, the lens unit 40a (an example of a first lens unit) faces the light emitting element 5a (an example of a first light emitting element) in the front-rear direction. The lens unit 40a is configured to form a low-beam light distribution pattern P1 (an example of a first low-beam light distribution pattern) having a horizontal cutoff line L1 (an example of a first cutoff line) by emitting light emitted from the light emitting element 5a toward the outside of the vehicle 1 (see fig. 8 (a)). Here, fig. 8 (a) is a diagram schematically showing a light distribution pattern formed on a virtual screen arranged in front 25m of the vehicle 1 when low beams are emitted. Fig. 8 (b) is a view schematically showing a light distribution pattern formed on the virtual screen when a high beam is emitted. The low-beam light distribution pattern P1 is formed to extend along the line H-H.
The lens unit 40a has a central light transmission portion 42a and a peripheral light transmission portion 43 a. The central light transmission portion 42a is opposed to the light emitting element 5a in the front-rear direction, and is configured to emit a part of the light emitted from the light emitting element 5a toward the outside of the vehicle 1. The peripheral light transmission portion 43a is provided so as to surround the central light transmission portion 42a, and is configured to totally reflect another part of the light emitted from the light emitting element 5a toward the outside of the vehicle 1. The low beam light distribution pattern P1 is formed by combining the light distribution pattern formed by the central light transmission portion 42a and the light distribution pattern formed by the peripheral light transmission portion 43 a.
The lens unit 40a has two recesses 54a and 56 a. The recess 54a communicates with the recess 56a, and the diameter of the recess 56a is larger than that of the recess 54 a. The central light transmission unit 42a has an emission surface 52a constituting the bottom surface of the recess 54a and an incidence surface 47 a. The peripheral light transmission unit 43a has an emission surface 53a constituting the bottom surface of the concave portion 56a, an incidence surface 49a, and a total reflection surface 46 a. In the present embodiment, the light emitting element 5a and the lens unit 40a constitute the first low-beam illumination unit 7a configured to form the low-beam light distribution pattern P1.
The lens unit 40b (an example of a third lens unit) faces the light emitting element 5b (an example of a third light emitting element) in the front-rear direction. The lens unit 40b is configured to form a light distribution pattern P3 for high beam by emitting light emitted from the light emitting element 5b toward the outside of the vehicle 1 (see fig. 8 (b)). The lens unit 40b has a central light transmission portion 42b and a peripheral light transmission portion 43 b. The central light transmission portion 42b is opposed to the light emitting element 5b in the front-rear direction, and is configured to emit a part of the light emitted from the light emitting element 5b toward the outside of the vehicle 1. The peripheral light transmission portion 43b is provided so as to surround the central light transmission portion 42b, and is configured to totally reflect another part of the light emitted from the light emitting element 5b toward the outside of the vehicle 1. The light distribution pattern P3 for high beam is formed by combining the light distribution pattern formed by the central light transmission portion 42b and the light distribution pattern formed by the peripheral light transmission portion 43 b.
In the lens unit 40b, two recesses 54b, 56b are formed. The recess 54b communicates with the recess 56b, and the diameter of the recess 56b is larger than that of the recess 54 b. The central light transmission portion 42b has an emission surface 52b constituting the bottom surface of the concave portion 54b and an incidence surface 47 b. The peripheral light transmission unit 43b has an emission surface 53b constituting the bottom surface of the concave portion 56b, an incidence surface 49b, and a total reflection surface 46 b. In the present embodiment, the light emitting element 5b and the lens unit 40b constitute a high beam illumination unit 7b configured to form a high beam light distribution pattern P3.
The lens unit 40c (an example of a third lens unit) faces the light emitting element 5c (an example of a third light emitting element) in the front-rear direction. The lens unit 40c has the same configuration as the lens unit 40b, and is configured to form a light distribution pattern P4 for high beam by emitting light emitted from the light emitting element 5c toward the outside of the vehicle 1 (see fig. 8 (b)). In the description of the present embodiment, the light distribution pattern P4 for high beam formed by the lens unit 40c and the light distribution pattern P3 for high beam formed by the lens unit 40b are assumed to completely overlap each other. The lens unit 40c has a central light transmission portion 42c and a peripheral light transmission portion 43 c. The central light transmission portion 42c is opposed to the light emitting element 5c in the front-rear direction, and is configured to emit a part of the light emitted from the light emitting element 5c toward the outside of the vehicle 1. The peripheral light transmission portion 43c is provided so as to surround the central light transmission portion 42c, and is configured to totally reflect another part of the light emitted from the light emitting element 5c toward the outside of the vehicle 1. The light distribution pattern P4 for high beam is formed by combining the light distribution pattern formed by the central light transmission portion 42c and the light distribution pattern formed by the peripheral light transmission portion 43 c.
In the lens unit 40c, two concave portions 54c, 56c are formed. The recess 54c communicates with the recess 56c, and the diameter of the recess 56c is larger than that of the recess 54 c. The central light transmission section 42c has an emission surface 52c constituting the bottom surface of the concave section 54c and an incidence surface 47 c. The peripheral light transmission unit 43c has an emission surface 53c, an incidence surface 49c, and a total reflection surface 46c, which constitute the bottom surface of the concave portion 56 c. In the present embodiment, the light-emitting element 5c and the lens unit 40c constitute a high-beam illumination unit 7c configured to form a high-beam light distribution pattern P4.
The lens unit 40d (an example of a second lens unit) faces the light emitting element 5d (an example of a second light emitting element) in the front-rear direction. The lens unit 40d is configured to form a low-beam light distribution pattern P2 having an inclined cutoff line L2 by emitting light emitted from the light emitting element 5d toward the outside of the vehicle 1 (see fig. 8 (a)). As shown in fig. 8 (a), the low-beam light distribution pattern P2 is formed to extend obliquely with respect to the H-H line. A light distribution pattern when the light beam is emitted is formed by the low-beam light distribution pattern P1 formed by the lens unit 40a and the low-beam light distribution pattern P2 formed by the lens unit 40 d. The lens unit 40d has a central light transmission portion 42d and a peripheral light transmission portion 43 d. The central light transmission portion 42d is opposed to the light emitting element 5d in the front-rear direction, and is configured to emit a part of the light emitted from the light emitting element 5d toward the outside of the vehicle 1. The peripheral light transmission portion 43d is provided so as to surround the central light transmission portion 42d, and is configured to totally reflect another part of the light emitted from the light emitting element 5d toward the outside of the vehicle 1. The low beam light distribution pattern P2 is formed by combining the light distribution pattern formed by the central light transmission portion 42d and the light distribution pattern formed by the peripheral light transmission portion 43 d.
In the lens unit 40d, two recesses 54d, 56d are formed. The recess 54d communicates with the recess 56d, and the diameter of the recess 56d is larger than that of the recess 54 d. The central light transmission portion 42d has an emission surface 52d constituting the bottom surface of the concave portion 54d and an incidence surface 47 d. The peripheral light transmission unit 43d has an emission surface 53d constituting the bottom surface of the concave portion 56d, an incidence surface 49d, and a total reflection surface 46 d. In the present embodiment, the second low-beam illumination unit 7d configured to form the low-beam light distribution pattern P2 is configured by the light emitting element 5d and the lens unit 40 d.
As described above, in the present embodiment, the lamp unit 3 includes the first low-beam illumination unit 7a (hereinafter, simply referred to as "illumination unit 7 a"), the high- beam illumination units 7b and 7c (hereinafter, simply referred to as " illumination units 7b and 7 c"), and the second low-beam illumination unit 7d (hereinafter, simply referred to as "illumination unit 7 d"). As shown in fig. 5, the illumination units 7a to 7d are arranged side by side in the left-right direction. The illumination units 7b and 7c are disposed between the illumination unit 7a and the illumination unit 7d in the left-right direction.
Emission surfaces 52a to 52d of the central light transmission sections 42a to 42d are located on the same plane, and emission surfaces 53a to 53d of the peripheral light transmission sections 43a to 43d are located on the same plane.
Next, the lens unit 40a will be specifically described with reference to fig. 6. Fig. 6 is a cross-sectional view showing the lens unit 40a in an enlarged manner. As shown in fig. 6, a part of the light emitted from the light emitting element 5a enters the incident surface 47a of the central light transmitting portion 42a and then reaches the emission surface 52 a. Then, the light reaching the output surface 52a is emitted to the outside while being diffused by the diffusion lens elements 48a formed on the output surface 52 a. On the other hand, the other part of the light emitted from the light emitting element 5a enters the entrance surface 49a of the peripheral light transmitting portion 43a and is totally reflected by the total reflection surface 46 a. Then, the light totally reflected by the total reflection surface 46a reaches the emission surface 53a, and is emitted to the outside in a state of being diffused by the diffusion lens element 48a formed on the emission surface 53 a. Thus, the low beam light distribution pattern P1 is formed by the lens unit 40 a.
The lens units 40b to 40d also have the same configuration as the lens unit 40 a. In this regard, as shown in fig. 4, the emission surfaces of the lens units 40b to 40d also include the diffusion lens elements 48b to 48 d. As shown in the figure, the diffusion lens elements 48a to 48c formed in the lens units 40a to 40c are formed to extend substantially in parallel in the vertical direction, respectively. On the other hand, since the lower end of the light emitting element 5d is inclined at an angle α (α > 0 °, for example, α is 15 °) with respect to the left-right direction, the diffusion lens element 48d formed in the lens unit 40d is formed to extend at the angle α with respect to the vertical direction.
Next, with reference to fig. 7, the configurations of the peripheral light transmission portions 43a, 43b, 43d of the lens cells 40a, 40b, 40d will be described below. Fig. 7 (a) is a front view schematically showing the illumination unit 7 a. Fig. 7 (b) is a front view schematically showing the illumination unit 7 b. Fig. 7 (c) is a front view schematically showing the illumination unit 7 d. As shown in fig. 7 (a), the peripheral light transmission part 43a of the lens unit 40a is provided so as to surround the central light transmission part 42a in the circumferential direction thereof. The peripheral light transmissive section 43a is divided into eight reflection regions R1 to R8 in its circumferential direction. The reflection regions R1 to R8 each have an angular region of 45 ° from the center of the lens unit 40 a. The reflective regions R1 to R8 have total reflection surfaces 46a having different outer shapes from each other.
As shown in fig. 7 (b), the peripheral light transmission part 43b of the lens unit 40b is provided to surround the central light transmission part 42b in the circumferential direction thereof. The peripheral light transmissive section 43b is not divided into a plurality of reflection regions in its circumferential direction. Further, since the lens unit 40c has the same structure as the lens unit 40b, the peripheral light transmitting portion 43c of the lens unit 40c is also not divided into a plurality of reflection regions in the circumferential direction thereof.
As shown in fig. 7 (c), the peripheral light transmission part 43d of the lens unit 40d is provided to surround the central light transmission part 42d in the circumferential direction thereof. The peripheral light transmissive section 43d is divided into eight reflection regions R10 to R17 in its circumferential direction. The reflection regions R10 to R17 each have an angular region of 45 ° from the center of the lens unit 40 d. The reflection regions R10 to R17 each have a total reflection surface 46d having a different shape from each other.
Next, the operation and effects of the lamp unit 3 according to the present embodiment will be described below.
According to the present embodiment, the illumination units 7b and 7c are disposed between the illumination unit 7a and the illumination unit 7 d. Therefore, when the low-beam light distribution patterns P1 and P2 are emitted from the vehicle 1, the illumination units 7a and 7b are turned on, while the illumination units 7b and 7c are turned off. In this way, the appearance of the lamp unit 3 in the low beam emission state is bilaterally symmetric about the center position of the lamp unit 3 in the lateral direction. Therefore, when the same lamp unit 3 is mounted on the left and right vehicle lamps 2L and 2R, the appearance of the lamp unit 3 of the left vehicle lamp 2L in the low beam emitting state substantially matches the appearance of the lamp unit 3 of the right vehicle lamp 2R in the low beam emitting state. Therefore, the same lamp unit 3 can be applied to both the left side vehicle lamp 2L and the right side vehicle lamp 2R. In this way, it is not necessary to manufacture two different lamp units for the left side vehicle lamp 2L and the right side vehicle lamp 2R, respectively, and manufacturing costs of the lamp unit 3 and the vehicle lamp can be reduced.
In the lamp unit 3 according to the present embodiment, since the lens units 40a to 40d form light distribution patterns based on the light emitted from the light emitting elements, the position adjustment between the lens units and the light emitting elements is important. In this regard, in the present embodiment, since the lens units 40a to 40d are integrally formed in the inner lens 4, the position adjustment between the lens unit 40a and the light emitting element 5a, the position adjustment between the lens unit 40b and the light emitting element 5b, the position adjustment between the lens unit 40c and the light emitting element 5c, and the position adjustment between the lens unit 40d and the light emitting element 5d can be collectively performed.
In the present embodiment, each of the lens units 40a to 40d has a central light transmission portion and a peripheral light transmission portion. Therefore, the light distribution pattern can be formed with the utilization efficiency of the light emitted from the light emitting element improved by the central light transmission portion and the peripheral light transmission portion of the lens unit.
Next, a light distribution pattern when the near light is emitted and a light distribution pattern when the far light is emitted will be described below with reference to fig. 8. As shown in fig. 8 (a), when the lamp unit 3 emits the low beam, the low beam light distribution patterns P1 and P2 are emitted to the outside of the vehicle 1, while the high beam light distribution patterns P3 and P4 are not emitted to the outside of the vehicle 1. That is, when the lamp unit 3 emits the near light, the lighting units 7a and 7d are turned on, while the lighting units 7b and 7c are turned off.
On the other hand, as shown in fig. 8 (b), when the lamp unit 3 emits a high beam, the light distribution patterns P3, P4 for a high beam and the light distribution pattern P1 for a low beam are emitted, while the light distribution pattern P2 for a low beam is not emitted. That is, when the lamp unit 3 emits far light, the lighting units 7a, 7b, and 7c are turned on, while the lighting unit 7d is turned off. In this way, since the lighting unit 7d is turned off while the lamp unit 3 is emitting the high beam, power consumption of the lamp unit 3 can be reduced, and the amount of heat radiated from the lamp unit 3 can be reduced.
Next, referring to fig. 9, the electrical connection relationship between the light emitting elements 5a to 5d of the illumination units 7a to 7d will be described below. As shown in fig. 9, the light emitting element 5a is connected to the light emitting elements 5d and 5 b. The light emitting element 5d and the changeover switch 21 are connected in series with each other, and the light emitting elements 5b, 5c and the changeover switch 22 are connected in series with each other. In addition, a group consisting of the light emitting element 5d and the changeover switch 21 and a group consisting of the light emitting elements 5b, 5c and the changeover switch 22 are connected in parallel. The switches 21, 22 are implemented by Field Effect Transistors (FETs), for example. When the low beam is emitted from the lamp unit 3, the changeover switch 21 is turned on, and the changeover switch 22 is turned off. When the lamp unit 3 emits high beam, the changeover switch 21 is turned off, and the changeover switch 22 is turned on.
Next, with reference to fig. 10 (a), a description will be given of a relationship between the lighting timings of the lighting units 7b and 7c and the turning-off timing of the lighting unit 7d when the light flux emitted from the lamp unit 3 is switched from the low beam to the high beam. In this case, the lighting units 7b and 7c are turned off (off)Lighting timing t for transition to lighting state (on state)onEarlier than the turning-off timing t at which the lighting unit 7d is switched from the on state to the off stateoff. Specifically, the timing at which the changeover switch 22 is changed from off to on is earlier than the timing at which the changeover switch 21 is changed from on to off. In this way, it is possible to prevent a situation in which the lighting unit 7d is turned off immediately before the lighting units 7b and 7c are turned on.
Next, referring to fig. 10 (b), a description will be given of a relationship between turning-off timings of the lighting units 7b and 7c and turning-on timings of the lighting unit 7d in a case where the light flux emitted from the lamp unit 3 is switched from the high beam to the low beam. In this case, the lighting timing t at which the lighting unit 7d is switched from the turned-off state to the turned-on stateonEarlier than the turning-off timing t at which the lighting units 7b and 7c are switched from the on state to the off stateoff. Specifically, the timing at which the changeover switch 21 is changed from off to on is earlier than the timing at which the changeover switch 22 is changed from on to off. This prevents the lighting units 7b and 7c from being turned off immediately before the lighting unit 7d is turned on.
While the embodiments of the present invention have been described above, it is needless to say that the technical scope of the present invention should not be construed as being limited by the description of the embodiments. The present embodiment is merely an example, and those skilled in the art will understand that various modifications of the embodiment can be made within the scope of the invention described in the claims. The technical scope of the present invention should be determined based on the scope of the invention described in the claims and the equivalent scope thereof.
For example, in the present embodiment, the lamp unit 3 includes two high-beam illumination units, but the number of high-beam illumination units is not particularly limited. For example, the number of the high beam illumination units provided in the lamp unit 3 may be one.
In this regard, a case is assumed where there is one high beam illumination unit provided in the lamp unit 3. For example, the lighting unit 7a, the lighting unit 7b, and the lighting unit 7d are arranged in the left-right direction in the lamp unit 3. In this case, the distance D between the outer edge of the lens unit 40a and the outer edge of the lens unit 40D in the left-right direction of the lamp unit 3 preferably satisfies 0mm < D < 75 mm. When the distance D satisfies 0mm < D < 75mm, while the low beam is emitted from the lamp unit 3, the turning-off of the illumination unit 7b becomes difficult to be visually recognized from the outside of the vehicle 1 due to the lighting of the illumination unit 7a and the lighting of the illumination unit 7D.
In the description of the present embodiment, the vehicle 1 is described as a four-wheel vehicle, but the vehicle of the present embodiment is not limited to a four-wheel vehicle. In this connection, the vehicle 1 may also be a motorcycle or a tricycle.
In the present embodiment, the illumination unit 7d is configured to emit the low-beam light distribution pattern P2 having the inclined cutoff line L2, but the cutoff line of the low-beam light distribution pattern P2 may be a horizontal cutoff line. In this regard, when the vehicle 1 is a motorcycle or a three-wheeled vehicle, the cutoff line of the low-beam light distribution pattern P2 becomes a horizontal cutoff line. By providing the low-beam light distribution pattern P2 with a horizontal cutoff line in this way, the lamp unit 3 can emit low beams for a motorcycle or a motor tricycle.
The disclosure of the Japanese patent application No. 2020-025176, filed on even.2/18/2020, is hereby incorporated by reference as appropriate.

Claims (10)

1. A lamp unit, wherein the lamp unit is provided with:
a first low-beam illumination unit configured to emit a first low-beam light distribution pattern having a first cutoff line;
a second low-beam illumination unit configured to emit a second low-beam light distribution pattern having a second cutoff line; and
a high beam illumination unit disposed between the first low beam illumination unit and the second low beam illumination unit and configured to emit a high beam light distribution pattern,
the first low-beam illumination unit, the second low-beam illumination unit, and the high-beam illumination unit are arranged side by side in a first direction.
2. The luminaire unit of claim 1,
the first low beam illumination unit includes:
a first light-emitting element that emits light; and
a first lens unit facing the first light emitting element and configured to form the first low-beam light distribution pattern by emitting light emitted from the first light emitting element,
the second low beam illumination unit includes:
a second light-emitting element which emits light; and
a second lens unit facing the second light emitting element and configured to form the second low-beam light distribution pattern by emitting light emitted from the second light emitting element,
the high beam illumination unit includes:
a third light-emitting element which emits light; and
a third lens unit facing the third light emitting element and configured to form the light distribution pattern for high beam by emitting light emitted from the third light emitting element,
the third light-emitting element is disposed between the first light-emitting element and the second light-emitting element in the first direction,
the third lens unit is disposed between the first lens unit and the second lens unit in the first direction.
3. The lamp unit according to claim 2, wherein an exit surface of the first lens unit, an exit surface of the second lens unit, and an exit surface of the third lens unit are located on a same plane.
4. The luminaire unit of claim 2 or 3, wherein,
the first light emitting element, the second light emitting element and the third light emitting element are arranged on the same circuit substrate,
the first lens unit, the second lens unit, and the third lens unit are integrally formed.
5. The luminaire unit of any one of claims 2-4, wherein a distance D between an outer edge of the first lens unit and an outer edge of the second lens unit in the first direction satisfies 0mm < D < 75 mm.
6. The luminaire unit of any of claims 2-5,
the first lens unit has:
a central light transmission unit that faces the first light emitting element and is configured to emit a part of the light emitted from the first light emitting element toward the outside of the vehicle; and
a peripheral light transmission portion provided so as to surround the central light transmission portion and configured to totally reflect another part of the light emitted from the first light emitting element toward an outside of the vehicle,
the peripheral light transmission part is divided into a plurality of reflection regions in a circumferential direction thereof.
7. The lamp unit according to any one of claims 1 to 6, wherein the lamp unit is mounted on a left-side vehicle lamp disposed on a left front side of the vehicle, and is mounted on a right-side vehicle lamp disposed on a right front side of the vehicle.
8. The lamp unit according to any one of claims 1 to 7, wherein in a state in which the high beam illumination unit is on, the first low beam illumination unit is on, and on the other hand, the second low beam illumination unit is off.
9. The luminaire unit of any of claims 1-8,
in a state where the high beam illumination unit is turned on, the first low beam illumination unit is turned on, while the second low beam illumination unit is turned off,
the timing at which the high beam illumination unit is switched from the turned-off state to the turned-on state is earlier than the timing at which the second low beam illumination unit is switched from the turned-on state to the turned-off state,
the first low beam illumination unit is turned on while the high beam illumination unit is turned off in a state where the second low beam illumination unit is turned on,
the timing at which the second low-beam illumination unit is switched from the turned-off state to the turned-on state is earlier than the timing at which the high-beam illumination unit is switched from the turned-on state to the turned-off state.
10. A vehicle lamp having the lamp unit according to any one of claims 1 to 9 mounted thereon.
CN202180006332.9A 2020-02-18 2021-01-20 Lamp unit and vehicle lamp Active CN114651151B (en)

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JP2020-025176 2020-02-18
JP2020025176 2020-02-18
PCT/JP2021/001906 WO2021166533A1 (en) 2020-02-18 2021-01-20 Light fixture unit and light fixture for vehicle

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Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546607A1 (en) * 1983-05-25 1984-11-30 Cibie Projecteurs Turn or brake light built into motor vehicle bodywork
JPH0338441A (en) * 1989-07-03 1991-02-19 Koito Mfg Co Ltd Head lamp for vehicle
US20050068787A1 (en) * 2003-09-29 2005-03-31 Koito Manufacturing Co., Ltd. Vehicle headlamp
CN101922666A (en) * 2008-12-24 2010-12-22 株式会社小糸制作所 Vehicular illumination lamp
JP2013149412A (en) * 2012-01-18 2013-08-01 Koito Mfg Co Ltd Vehicle lighting fixture
JP2014086306A (en) * 2012-10-24 2014-05-12 Stanley Electric Co Ltd Vehicular lighting fixture
CN104279482A (en) * 2013-07-03 2015-01-14 斯坦雷电气株式会社 Vehicle headlamp and vehicle headlamp system
JP2016004665A (en) * 2014-06-16 2016-01-12 株式会社小糸製作所 Electronic device
JP2017137026A (en) * 2016-02-05 2017-08-10 トヨタ自動車株式会社 Vehicular headlight system
CN107076390A (en) * 2014-09-16 2017-08-18 株式会社小糸制作所 Lamps apparatus for vehicle
CN108966409A (en) * 2017-05-26 2018-12-07 株式会社小糸制作所 The lighting circuit of Vehicular lamp and light source
CN109114522A (en) * 2018-11-16 2019-01-01 湖南德霸照明制造有限公司 Automobile-used fog lamp assembly
CN109556071A (en) * 2017-09-25 2019-04-02 株式会社小糸制作所 Headlight for automobile
CN109578932A (en) * 2017-09-28 2019-04-05 株式会社小糸制作所 Lamps apparatus for vehicle
US20190143885A1 (en) * 2017-11-14 2019-05-16 Koito Manufacturing Co., Ltd. Aiming adjustment method for vehicle headlamp, aiming adjustment mechanism for vehicle headlamp and vehicle headlamp
WO2019124188A1 (en) * 2017-12-19 2019-06-27 株式会社小糸製作所 Vehicle headlight
JP2019153484A (en) * 2018-03-05 2019-09-12 コイト電工株式会社 Illumination device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05238308A (en) * 1992-02-28 1993-09-17 Matsushita Electric Works Ltd Lighting control device
JP6039964B2 (en) * 2012-08-10 2016-12-07 株式会社小糸製作所 Vehicle headlamp

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546607A1 (en) * 1983-05-25 1984-11-30 Cibie Projecteurs Turn or brake light built into motor vehicle bodywork
JPH0338441A (en) * 1989-07-03 1991-02-19 Koito Mfg Co Ltd Head lamp for vehicle
US20050068787A1 (en) * 2003-09-29 2005-03-31 Koito Manufacturing Co., Ltd. Vehicle headlamp
CN101922666A (en) * 2008-12-24 2010-12-22 株式会社小糸制作所 Vehicular illumination lamp
JP2013149412A (en) * 2012-01-18 2013-08-01 Koito Mfg Co Ltd Vehicle lighting fixture
JP2014086306A (en) * 2012-10-24 2014-05-12 Stanley Electric Co Ltd Vehicular lighting fixture
CN104279482A (en) * 2013-07-03 2015-01-14 斯坦雷电气株式会社 Vehicle headlamp and vehicle headlamp system
JP2016004665A (en) * 2014-06-16 2016-01-12 株式会社小糸製作所 Electronic device
CN107076390A (en) * 2014-09-16 2017-08-18 株式会社小糸制作所 Lamps apparatus for vehicle
JP2017137026A (en) * 2016-02-05 2017-08-10 トヨタ自動車株式会社 Vehicular headlight system
CN108966409A (en) * 2017-05-26 2018-12-07 株式会社小糸制作所 The lighting circuit of Vehicular lamp and light source
CN109556071A (en) * 2017-09-25 2019-04-02 株式会社小糸制作所 Headlight for automobile
CN109578932A (en) * 2017-09-28 2019-04-05 株式会社小糸制作所 Lamps apparatus for vehicle
US20190143885A1 (en) * 2017-11-14 2019-05-16 Koito Manufacturing Co., Ltd. Aiming adjustment method for vehicle headlamp, aiming adjustment mechanism for vehicle headlamp and vehicle headlamp
CN109780501A (en) * 2017-11-14 2019-05-21 株式会社小糸制作所 Headlight for automobile and its to light method of adjustment, to light adjustment mechanism
WO2019124188A1 (en) * 2017-12-19 2019-06-27 株式会社小糸製作所 Vehicle headlight
JP2019153484A (en) * 2018-03-05 2019-09-12 コイト電工株式会社 Illumination device
CN109114522A (en) * 2018-11-16 2019-01-01 湖南德霸照明制造有限公司 Automobile-used fog lamp assembly

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