JP2022179087A - Vehicular lighting tool - Google Patents

Abstract

To provide a vehicular lighting tool for enabling the radiation of light reflected by a reflector frontward and obliquely downward while enhancing the utilization efficiency of the light reflected by the reflector.SOLUTION: The vehicular lighting tool includes a light source 6 for emitting light L downward, a first reflector 7 arranged below the light source 6, and including a first reflection region 7a for reflecting first light L1 out of the light L emitted from the light source 6 frontward and a second reflection region 7b for reflecting second light L2 upward, and a second reflector 8 arranged in front of the light source 6 and above the first reflector 7, and including a third reflection region 8a for reflecting the second light L2 frontward and obliquely downward.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle lamp.

For example, as a vehicle lamp mounted on a vehicle, there is one in which a light source such as a light emitting diode (LED) and a reflector that reflects the light emitted from the light source forward are arranged inside the lamp ( For example, see Patent Document 1 below.).

JP 2011-175817 A

By the way, in recent years, in addition to the legal light distribution as a back lamp, there is a demand for improved visibility when using a back camera by brightly illuminating the road surface on the front side behind the vehicle. there is

On the other hand, in the above-described conventional vehicle lamp, the light distribution cutoff provided on the outer lens covering the front side of the lamp controls the light distribution of the light emitted forward of the lamp. However, with such light distribution control, it is difficult to obtain sufficient road surface illumination while satisfying the legally regulated light distribution as a back lamp described above.

Further, when the light emission range of the back lamp is reduced in the height direction, it becomes more difficult to adjust the angle of the light reflected by the reflector toward the road surface on the front side behind the vehicle. Furthermore, the utilization efficiency of the light reflected by the reflector is also lowered.

SUMMARY OF THE INVENTION The present invention has been proposed in view of such a conventional situation. An object of the present invention is to provide a vehicular lamp capable of

In order to achieve the above object, the present invention provides the following means.
[1] a light source that emits light downward;
A first reflective area arranged below the light source to reflect forward the first light out of the light emitted from the light source, and a second reflective area to reflect the second light upward. a first reflector comprising two reflective areas;
and a second reflector disposed forward of the light source and above the first reflector and including a third reflection area that reflects the second light obliquely downward and forward. lamp.
[2] A reflector is arranged forwardly of the first reflector and downwardly of the second reflector to cover a part of the front side of the first reflector and to emit the first light and the second light. The vehicle lamp according to [1] above, further comprising an extension that forms at least a part of the opening through which light passes.
[3] The above-mentioned [ 1] or the vehicle lamp according to [2].
[4] The above [1] to [1] to [1], wherein the second reflector includes a plurality of diffuse reflection cuts that are positioned in the third reflection area and reflect the second light while diffusing it. 3].

As described above, according to the present invention, there is provided a vehicular lamp capable of irradiating the light reflected by the reflector forward and obliquely downward while improving the utilization efficiency of the light reflected by the reflector. It is possible to provide

1 is a cross-sectional view showing the configuration of a vehicle lamp according to an embodiment of the present invention; FIG. 2 is an enlarged cross-sectional view of an enclosing portion A shown in FIG. 1; FIG. 3 is an enlarged cross-sectional view of a second reflection area of the first reflector shown in FIG. 2; FIG. 3 is an enlarged cross-sectional view of a third reflection area of the second reflector shown in FIG. 2; 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 one embodiment of the present invention, for example, a vehicle lamp 1 shown in FIGS. 1 to 4 will be described.
1 is a cross-sectional view showing the configuration of the vehicle lamp 1. As shown in FIG. FIG. 2 is an enlarged cross-sectional view of the enclosing portion A shown in FIG. FIG. 3 is an enlarged cross-sectional view of the second reflective area 7b of the first reflector 7. As shown in FIG. FIG. 4 is an enlarged cross-sectional view of the third reflection area 8a of the second reflector 8. 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 (length direction) of the vehicle lamp 1, the Y-axis direction is the left-right direction (width direction) of the vehicle lamp 1, and the Z The axial direction is indicated as the vertical direction (height direction) of the vehicle lamp 1 .

The vehicle lamp 1 of the present embodiment applies the present invention to, for example, a back lamp that emits white light among rear combination lamps mounted at both corners on the rear end side of a vehicle (not shown). be.

In the following description, unless otherwise specified, the terms "front", "rear", "left", "right", "upper", and "lower" are used when the vehicle lamp 1 is viewed from the front (rear of the vehicle). shall mean the respective directions of Therefore, each direction when the vehicle is viewed from the front (vehicle front) is a direction in which front, rear, left, and right are reversed.

Specifically, as shown in FIGS. 1 and 2, this vehicle lamp 1 is arranged inside a lamp body 2 that constitutes a rear combination lamp. The lamp body 2 is composed of a housing 3 with an open front surface and a cover lens (outer lens) 4 that covers the opening of the housing 3 . The vehicle lamp 1 is held inside the lamp body 2 via a bracket 5 or the like arranged inside the lamp body 2 . It should be noted that the shape of the lamp body 2 can be appropriately changed in accordance with the design of the vehicle.

A vehicle lamp 1 of this embodiment includes a light source 6 arranged inside a lamp body 2 , a first reflector 7 , a second reflector 8 , and an extension 9 .

The light source 6 is composed of an LED that emits white light (hereinafter simply referred to as "light") L, for example. The light source 6 is mounted on one side (lower side in this embodiment) of a circuit board 10 provided with a drive circuit (not shown) for driving the LEDs, and emits light L radially downward.

In this embodiment, the LEDs constituting the light source 6 described above and the driving circuit for driving the LEDs are mounted on the circuit board 10. However, the mounting board on which the LEDs are mounted, A circuit board on which a drive circuit for driving the LEDs is provided is separately arranged, and the mounting board and the circuit board are electrically connected via a wiring cord called a harness, so that the heat generated by the LEDs is transferred to the drive circuit. may be configured to protect the

The first reflector 7 is made of a reflective member provided with a reflective film such as an aluminum deposition film. The first reflector 7 is arranged below the light source 6 and has a first reflection area 7 a and a second reflection area 7 b that reflect the light L emitted from the light source 6 .

Specifically, the first reflector 7 forwards the light L1 that has entered the first reflection area 7a (hereinafter referred to as "first light") out of the light L emitted from the light source 6. light (hereinafter referred to as "second light") L2 incident on the second reflection region 7b is reflected diagonally upward forward.

The first reflective area 7a is located behind the optical axis of the light L emitted from the light source 6 in the vertical cross section along the front-rear direction. The first reflective area 7a is composed of a concave parabolic reflective surface formed to draw a parabola with the center (light emitting point) of the light source 6 as the focal point. Thereby, the first reflector 7 reflects the first light L1 incident on the first reflection region 7a forward while collimating it.

The second reflective area 7b constitutes a reflective surface extending forward from the lower end of the first reflective area 7a in a vertical cross section along the front-rear direction. In addition, as shown in FIG. 3, a plurality of reflection cuts 11 for efficiently reflecting the second light L2 toward the second reflector 8 are arranged in the front-rear direction in the second reflection region 7b. It is The inclination angle of each surface of the plurality of reflection cuts 11 is adjusted so that the second light L2 incident on each surface is reflected toward the second reflector 8 .

The second reflector 8 is made of, for example, a white reflective member having light diffusion properties. The second reflector 8 is arranged in front of the light source 6 and above the first reflector 7 to form a third reflection area 8a that reflects the second light L2 forward and obliquely downward while diffusing it. have.

The third reflective area 8a constitutes a diffuse reflection surface extending in the front-rear direction so as to face the second reflective area 7b in a vertical cross section along the front-rear direction. In addition, as shown in FIG. 4, the third reflection area 8a is provided with a plurality of diffuse reflection cuts 12 aligned in the front-rear direction for efficiently reflecting the second light L2 forward and obliquely downward. It is The inclination angles of the respective surfaces of the plurality of diffuse reflection cuts 12 are adjusted so that the second light L2 incident on the respective surfaces is diffused and reflected forward and obliquely downward.

The extension 9 is made of, for example, a black light blocking member. The extension 9 covers part of the front side of the first reflector 7 and forms at least part of the opening K through which the first light L1 and the second light L2 pass. Specifically, the extension 9 is arranged to narrow the opening K in the vertical direction by covering the front lower portion of the first reflector 7 .

In the vehicle lamp 1 of the present embodiment having the configuration described above, the first light L1 reflected by the first reflection area 7a of the first reflector 7 is emitted forward through the opening K. be done. As a result, it is possible to satisfy the legal light distribution as a back lamp.

On the other hand, in the vehicle lamp 1 of the present embodiment, the second light L2 reflected by the second reflection area 7b of the first reflector 7 is reflected by the third reflection area 8a of the second reflector 8. , the second light L2 is emitted forward and obliquely downward through the opening K. As shown in FIG. This makes it possible to illuminate the road surface on the front side behind the vehicle brighter than the second light L2.

In addition, in the vehicle lamp 1 of the present embodiment, by narrowing the distance in the vertical direction of the opening K, when the back lamp is not lit, the extension 9 that covers the opening K and its surroundings It is possible to make it look black as a whole. As a result, it is possible to improve the design (marketability) when the back lamp is not lit.

On the other hand, in the vehicle lamp 1 of the present embodiment, even when the light emission range (opening K) of the back lamp is reduced in the height direction, the plurality of reflection cuts 11 provided in the second reflection area 7b and the , and a plurality of diffuse reflection cuts 12 provided in the third reflection area 8a to control the reflection direction of the second light L, thereby directing the second light L2 forward and obliquely downward through the opening K. It is possible to radiate the light efficiently.

As described above, in the vehicular lamp 1 of the present embodiment, the utilization efficiency of the first and second lights L1 and L2 reflected by the first and second reflectors 7 and 8 is improved, and the reflectors 7 , 8 can be directed forward and obliquely downward. Therefore, with the vehicle lamp 1 of the present embodiment, it is possible to obtain sufficient road surface illuminance while satisfying the legal light distribution as a back lamp.

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 above-described embodiment, the present invention is applied to a back lamp that constitutes the above-described rear combination lamp. , For example, the present invention can be widely applied to vehicle lamps such as position lamps, daytime lighting lamps (DRL), tail lamps, brake lamps (stop lamps), and direction indicators (turn lamps). It is possible to apply

As for the light source, a light-emitting element such as a laser diode (LD) can be used in addition to the above-described LED. Further, the color of the light L emitted by the light source is not limited to the above-described white light, and can be appropriately changed to red light, orange light, or the like, depending on the application of the vehicle lamp.

DESCRIPTION OF SYMBOLS 1... Vehicle lamp 2... Lamp body 3... Housing 4... Cover lens (outer lens) 5... Bracket 6... Light source 7... First reflector 8... Second reflector 9... Extension 10... Circuit board 11... Reflection cut 12 ... diffuse reflection cut L ... light L1 ... first light L2 ... second light

Claims (4)

a light source that emits light downward;
A first reflective area arranged below the light source to reflect forward the first light out of the light emitted from the light source, and a second reflective area to reflect the second light upward. a first reflector comprising two reflective areas;
and a second reflector disposed forward of the light source and above the first reflector and including a third reflection area that reflects the second light obliquely downward and forward. lamp. It is arranged in front of the first reflector and below the second reflector, covers a part of the front side of the first reflector, and transmits the first light and the second light. 2. The vehicle lamp according to claim 1, further comprising an extension that forms at least a portion of the opening. 3. The first reflector includes a plurality of reflective cuts positioned in the second reflective area to reflect the second light toward the second reflector. The vehicle lamp according to . 4. The second reflector according to any one of claims 1 to 3, wherein the second reflector includes a plurality of diffuse reflection cuts that are positioned in the third reflection area and reflect the second light while diffusing it. 1. Vehicle lamp according to item.

Images