JP7171413B2 - vehicle lamp - Google Patents

Description

The present invention relates to a vehicle lamp.

For example, there are straddle-type vehicles such as motorcycles and tricycles. A vehicle lamp mounted on such a straddle-type vehicle (hereinafter referred to as a "straddle-type vehicle lamp") comprises a housing having an open front surface and a lens cover covering the opening of the housing. A plurality of light sources are arranged inside the body, and the light emitted from each light source is reflected by a reflector while emitting light toward the front of the vehicle (see, for example, Patent Document 1 below. ).

JP 2013-131316 A

By the way, among the above-described straddle-type vehicle lamps, there are a central light source that irradiates light forward from the center of the lamp body and a central light source that sandwiches the central light source in accordance with the design of the straddle-type vehicle. There is one in which a pair of outside light sources that irradiate light forward from the left and right sides and center side light sources are arranged inside the lamp body.

In addition, some of such vehicle lamps irradiate light forward from the lower side and the upper side with the board on which the light source is mounted. In this case, light sources are mounted on both sides of the substrate, and reflectors corresponding to the respective light sources are arranged. However, even with such a configuration, the cost increases due to the increase in the number of light sources.

SUMMARY OF THE INVENTION The present invention has been proposed in view of such conventional circumstances, and it is an object of the present invention to provide a vehicle lamp capable of reducing the number of light sources.

In order to achieve the above object, the present invention provides the following means.
[1] a first light emitting unit that emits first light forward;
a second light irradiation unit that irradiates a second light forward from one of the left and right sides of the first light irradiation unit and above the first light irradiation unit;
The first light irradiation unit includes a light source that emits the first light, a first reflector that forwardly reflects the first light emitted from the light source, and a mounting substrate on which the light source is mounted. and
The second light irradiation section uses part of the first light emitted from the light source as the second light, and emits the first light on one of the left and right sides of the first light irradiation section. A second reflector that reflects upward and backward from the irradiation unit, and a third reflector that reflects forward the second light reflected by the second reflector ,
The vehicle lamp , wherein the mounting substrate has a through hole through which the second light reflected by the second reflector passes toward the third reflector .
[ 2 ] The second reflector includes a second reflecting surface formed by a spheroid,
The third reflector includes a third reflecting surface configured by a paraboloid of revolution,
a first focal point of an ellipsoid of revolution that constitutes the second reflecting surface and the light source are at positions that coincide with each other;
A second focal point of the ellipsoid of revolution forming the second reflecting surface and a focal point of the paraboloid of revolution forming the third reflecting surface are located inside the through hole. 1 ].
[ 3 ] The first reflector includes a first reflecting surface formed by a paraboloid of revolution,
The vehicular lamp according to [ 2 ], wherein the focal point of the paraboloid of revolution forming the first reflecting surface and the light source coincide with each other.
[ 4 ] The second focus of the ellipsoid of revolution forming the second reflecting surface and the focus of the paraboloid of revolution forming the third reflecting surface are aligned with each other. The vehicle lamp according to [ 2 ] or [ 3 ].
[ 5 ] The vehicle lamp according to any one of [1] to [ 4 ], which is a straddle-type vehicle lamp mounted on a straddle-type vehicle.

As described above, according to the present invention, it is possible to provide a vehicle lamp capable of reducing the number of light sources.

1 is a see-through front view showing a schematic configuration of a straddle-type vehicle lamp according to an embodiment of the present invention; FIG. FIG. 2 is a front view showing an enlarged main part of the straddle-type vehicle lamp shown in FIG. 1 ; FIG. 2 is a side sectional view showing an enlarged main part of the straddle-type vehicle lamp shown in FIG. 1 ; FIG. 2 is a schematic cross-sectional view showing an optical path of second light from the straddle-type vehicle lamp shown in FIG. 1 ; 2 is a schematic cross-sectional view showing a modification of the optical path of the second light by the straddle-type vehicle lamp shown in FIG. 1; FIG. 2 is a schematic cross-sectional view showing a modification of the optical path of the second light by the straddle-type vehicle lamp shown in FIG. 1; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the drawings used in the following description, the scale of dimensions may vary depending on the component in order to make it easier to see each component, and the dimensional ratio of each component may not necessarily be the same as the actual do not have.

As an embodiment of the present invention, a straddle-type vehicle lamp 1 shown in FIGS. 1 to 3, for example, will be described.
1 is a see-through front view showing a schematic configuration of the straddle-type vehicle lamp 1. As shown in FIG. FIG. 2 is a front view showing an enlarged main part of the straddle-type vehicle lamp 1. As shown in FIG. FIG. 3 is a side sectional view showing an enlarged main part of the straddle-type vehicle lamp 1. As shown in FIG.

In the drawings shown below, an XYZ orthogonal coordinate system is set, the X-axis direction is the front-rear direction (longitudinal direction) of the straddle-type vehicle lamp 1, and the Y-axis direction is the left-right direction of the straddle-type vehicle lamp 1. (width direction) and the Z-axis direction are shown as the vertical direction (height direction) of the straddle-type vehicle lamp 1, respectively.

The straddle-type vehicle lamp 1 of the present embodiment is, for example, a vehicle headlamp (headlamp) mounted in the front central portion of a straddle-type vehicle (not shown) such as a motorcycle or a tricycle. The present invention is applied.

In the following description, unless otherwise specified, the terms "front", "rear", "left", "right", "upper", and "lower" are used when the saddle type vehicle lamp 1 is viewed from the front (front of the vehicle). shall mean each direction when viewed.

As shown in FIGS. 1, 2 and 3, a straddle-type vehicle lamp 1 of the present embodiment comprises a housing 2 having an open front surface and a transparent lens cover 3 covering the opening of the housing 2. It has a lamp body 4 that

The straddle-type vehicle lamp 1 includes a high beam lamp 5 for irradiating a high beam from the center side of the lamp body 4 toward the front of the vehicle inside the lamp body 4, and a high beam lamp 5 for illuminating the vehicle from both left and right sides with the high beam lamp 5 therebetween. A pair of low beam lamps 6A and 6B for irradiating a low beam forward is provided. The straddle-type vehicle lamp 1 has a V-shaped design suspended from the central high beam lamp 5 toward the left and right high beam lamps 6A and 6B.

The high beam lamp 5 has a central light source 7 that emits high beam light and a central reflector 8 that reflects the light emitted from the central light source 7 forward.

The central light source 7 consists of, for example, a light emitting diode (LED) that emits white light. Also, for the LED, a high output (high brightness) type for vehicle lighting (for example, SMD LED, etc.) can be used.

The central light source 7 is mounted near the center of one surface (lower surface in this embodiment) of the mounting substrate 9 . That is, the mounting board 9 is arranged with the central light source 7 facing downward. The center-side light source 7 radially emits light downward perpendicular to one surface of the mounting board 9 .

The central reflector 8 has a front surface as a reflective surface 8a. The central reflector 8 is arranged near the center of one surface of the mounting substrate 9 (the lower side sandwiching the mounting substrate 9 in this embodiment) in accordance with the arrangement of the central light source 7 .

The reflective surface 8a of the central reflector 8 is composed of a part of a paraboloid of revolution whose focal point coincides with the center (light emitting point) of the central light source 7 so as to surround the central light source 7 except in front thereof. It is Thereby, the central reflector 8 reflects the light emitted from the central light source 7 forward by the reflecting surface 8a while collimating the light.

The pair of low-beam lamps 6A and 6B basically have the same configuration except that they are bilaterally symmetrical with the high-beam lamp 5 interposed therebetween. Therefore, in the present embodiment, the configuration of one of the low beam lamps 6A will be described as an example.

The low-beam lamp 6A includes a first light irradiation section 10 that irradiates a first light L1 that becomes a main low beam inside the lamp body 4, and one side (one side) of the left and right sides of the first light irradiation section 10. The other low beam lamp 6A is on the left side, and the other low beam lamp 6B is on the right side), and the second light L2 that is a secondary low beam is emitted forward from the upper side of the first light irradiation unit 10. It has a configuration in which an irradiation unit 11 is provided.

The first light irradiation unit 10 has an outer light source 12 that emits a first light L1, and a first reflector 13 that forwardly reflects the first light L1 emitted from the outer light source 12. ing. The second light irradiation unit 11 uses part of the first light emitted from the outer light source 12 as the second light L2, and emits the first light on one of the left and right sides of the first light irradiation unit 10. It has a second reflector 14 that reflects upward and rearward from the irradiation unit 10, and a third reflector 15 that reflects forward the second light L2 reflected by the second reflector 14. is doing.

The external light source 12 consists of, for example, a light emitting diode (LED) that emits white light. Also, for the LED, a high output (high brightness) type for vehicle lighting (for example, SMD LED, etc.) can be used.

The outer light sources 12 are mounted on the bottom surface (one surface) of the mounting board 9 near both left and right ends with the central light source 7 interposed therebetween. That is, the mounting substrate 9 is arranged with the outer light source 12 facing downward. The outer light source 12 radially emits light downward perpendicular to one surface of the mounting substrate 9 .

The straddle-type vehicle lamp 1 of the present embodiment is provided with a mounting substrate 9 on which a plurality of LEDs constituting the central light source 7 and the outer light source 12 are mounted, and a drive circuit for driving the plurality of LEDs. A circuit board (not shown) is placed separately, and the mounting board and the circuit board are electrically connected via a wiring cord (not shown) called a harness, and the heat generated by the multiple LEDs is removed. It is configured to protect the drive circuit.

The straddle-type vehicle lamp 1 of the present embodiment is not necessarily limited to such a configuration. may be implemented.

The front surface of the first reflector 13 is a first reflecting surface 13a. The first reflectors 13 are arranged on both left and right sides of the central reflector 8 on one side of the mounting substrate 9 (in this embodiment, the lower side of the mounting substrate 9) in accordance with the arrangement of the outer light source 12. ing.

The first reflecting surface 13a is formed by a part of a paraboloid of revolution having a focal point F1 that coincides with the center (light emitting point) of the outer light source 12 so as to surround the outer light source 12 except for the front thereof. . Thereby, the first reflector 13 reflects the first light L1 emitted from the outer light source 12 forward by the first reflecting surface 13a while collimating it.

The rear surface of the second reflector 14 is a second reflecting surface 14a. The second reflector 14 is formed smaller than the first reflector 13 . The second reflector 14 is arranged on one side of the mounting board 9 (in this embodiment, on the lower side with the mounting board 9 interposed therebetween) so as to face the vicinity of the center of the upper side of the first reflector 13 .

The second reflecting surface 14a is composed of a part of the ellipsoid of revolution having a first focal point F21 coinciding with the center (light emitting point) of the outer light source 12 so as to surround the outer light source 12 except for the rear thereof. there is As a result, the second reflector 14 converts part of the first light L1 directed from the outer light source 12 toward the second reflecting surface 14a into the second light L2, and the second reflecting surface 14a directs the third reflector 15 toward the second light L2. Reflects while concentrating light toward.

The front surface of the third reflector 15 serves as a third reflecting surface 15a. The third reflector 15 is displaced above and outside the first reflector 13 on the other side of the mounting board 9 (the upper side sandwiching the mounting board 9 in this embodiment). placed in position.

The third reflecting surface 15a is a paraboloid of revolution having a focal point F3 coinciding with the second focal point F22 so as to surround the second focal point of the spheroid forming the second reflecting surface 14a excluding the front thereof. Consists of part of the surface. As a result, the third reflector 15 reflects the second light L2 reflected by the second reflector 14 while collimating it forward by the third reflecting surface 15a.

The mounting board 9 has a through-hole 16 that allows the second light L2 reflected by the second reflector 14 to pass toward the third reflector 15 . A second focal point F22 of the ellipsoid of revolution forming the second reflecting surface 14a and a focal point F3 of the paraboloid of revolution forming the third reflecting surface 15a are located inside the through-hole 16 . That is, the second focal point F22 of the spheroid forming the second reflecting surface 14a and the focal point F3 of the paraboloid of revolution forming the third reflecting surface 15a coincide with each other inside the through hole 16. in position.

As a result, by reducing the diameter of the second light L2 traveling from the second reflecting surface 14a to the third reflecting surface 15a at the position where it passes through the through hole 16, a part of the second light L2 is blocked. It is possible to prevent the light from being blocked by the mounting substrate 9, which is an object. It is also possible to reduce the diameter of the through hole 16 formed in the mounting board 9 .

In the straddle-type vehicle lamp 1 of the present embodiment having the configuration described above, the light source is not arranged on the lower side and the upper side with the mounting board 9 interposed therebetween, and the lower surface (one surface) side of the mounting board 9 is mounted. Using the outer light source 12 arranged in the front, the first light L1 to be the main low beam is emitted forward from the lower side sandwiching the mounting board 9, and the sub low beam is emitted from the upper side sandwiching the mounting board 9. It is possible to irradiate the second light L2 forward.

In addition, in the straddle-type vehicle lamp 1 of the present embodiment, the first reflector 13 corresponding to the first light irradiation section 10 and the second light source 12 are arranged without any restrictions on the arrangement of the outer light source 12 . It is possible to arrange the third reflector 15 corresponding to the irradiation section 11 at the optimum position.

As described above, in the straddle-type vehicle lamp 1 of the present embodiment, it is possible to increase the degree of freedom of light distribution while reducing the number of light sources.

It should be noted that the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.
For example, in the straddle-type vehicle lamp 1, as shown in FIG. The third reflecting surface 15a of the reflector 15 reflects the light while collimating it forward.

On the other hand, in the straddle-type vehicle lamp 1, as shown in FIG. 5, the shape of the front end side of the third reflecting surface 15a is set downward, so that the light is reflected on the front end side of the third reflecting surface 15a. The second light L2 may be directed toward the road surface in front of the straddle-type vehicle.

On the other hand, in the straddle-type vehicle lamp 1, as shown in FIG. 6, a downward reflecting surface 2a is provided on a part of the housing 2 ahead of the front end of the third reflecting surface 15a. The second light L2 reflected by 15a may be configured to irradiate the road surface in front of the saddle type vehicle.

In the above embodiment, the present invention is applied to a vehicle headlamp (headlamp) for a straddle-type vehicle. The present invention can be applied not only to straddle-type vehicle lamps, but also to straddle-type vehicle lamps on the rear side. Furthermore, although the present invention is suitably used for the straddle-type vehicle lamp described above, the present invention can also be applied to a vehicle lamp mounted on both corners of a four-wheeled vehicle or the like on the front end side or the rear end side. is also possible.

Further, the central light source 7 and the outer light source 12 may be those that emit light radially, and light-emitting elements such as laser diodes (LD) can be used in addition to the above-described LEDs. Further, the color of the light emitted by the light-emitting element is not limited to the white light described above, and can be appropriately changed to red light, orange light, or the like, depending on the application of the light source.

DESCRIPTION OF SYMBOLS 1... Straddle-type vehicle lamp 2... Housing 3... Lens cover 4... Lamp body 5... High beam lamp 6A, 6B... Low beam lamp 7... Center side light source 8... Center side reflector 9... Mounting substrate 10... First first Light irradiation part 11 Second light irradiation part 12 Outer light source 13 First reflector 14 Second reflector 15 Third reflector 16 Through hole L1 First light L2 Second light

Claims (5)

a first light emitting unit that emits first light forward;
a second light irradiation unit that irradiates a second light forward from one of the left and right sides of the first light irradiation unit and above the first light irradiation unit;
The first light irradiation unit includes a light source that emits the first light, a first reflector that forwardly reflects the first light emitted from the light source, and a mounting substrate on which the light source is mounted. and
The second light irradiation section uses part of the first light emitted from the light source as the second light, and emits the first light on one of the left and right sides of the first light irradiation section. A second reflector that reflects upward and backward from the irradiation unit, and a third reflector that reflects forward the second light reflected by the second reflector ,
The vehicle lamp , wherein the mounting substrate has a through hole through which the second light reflected by the second reflector passes toward the third reflector . The second reflector includes a second reflecting surface configured by a spheroid,
The third reflector includes a third reflecting surface configured by a paraboloid of revolution,
a first focal point of an ellipsoid of revolution that constitutes the second reflecting surface and the light source are at positions that coincide with each other;
2. A second focal point of an ellipsoid of revolution forming said second reflecting surface and a focal point of a paraboloid of revolution forming said third reflecting surface are positioned inside said through-hole. 1. The vehicle lamp according to 1. The first reflector includes a first reflecting surface configured by a paraboloid of revolution,
3. The vehicular lamp according to claim 2 , wherein a focal point of a paraboloid of revolution forming said first reflecting surface and said light source coincide with each other. 3. The second focal point of the ellipsoid of revolution forming the second reflecting surface and the focal point of the paraboloid of revolution forming the third reflecting surface are located at the same position. 3. The vehicle lamp according to 3. The vehicle lamp according to any one of claims 1 to 4 , which is a straddle-type vehicle lamp mounted on a straddle-type vehicle.

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