JP7202822B2 - vehicle lamp - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lamp having an inner lens for controlling light distribution of light incident from a light source.

For example, LEDs (light-emitting diodes) are being used in place of conventional bulbs (light bulbs) as light sources for vehicle lamps such as tail lamps arranged on the left and right sides of the rear portion of a vehicle. This LED has advantages such as high luminous efficiency, long life, and low power consumption. . For this reason, the distribution of light emitted from the LED is usually controlled by an inner lens (see, for example, Patent Document 1).

In such a vehicle lamp, the light entering the inner lens from the LED is emitted from the emission surface in the course of traveling through the inner lens while repeating total reflection, whereby the entire inner lens emits light. In this case, the light that leaks from other than the exit surface of the inner lens is reflected by the reflector, reenters the inner lens, and finally exits from the exit surface to be used for light emission by the reflector. be done.

JP-A-2004-087461

However, in vehicle lamps, the reflector cannot be arranged over the entire longitudinal length of the inner lens due to the design of the vehicle body, and the longitudinal ends of the inner lens are covered by the reflector. A configuration that does not have In such a case, the light emitted from the portion of the inner lens that is not covered by the reflector is not used for the light emission of the vehicle lamp, so that the efficiency of light utilization is low, and the end portion of the vehicle lamp is used more than the other portions. A problem arises in that it becomes dark and the whole cannot emit light uniformly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicular lamp capable of increasing the utilization efficiency of light from a light source and uniformly emitting light as a whole.

In order to achieve the above object, the present invention provides the following means.
[1] In a lamp chamber defined by a housing and an outer lens covering an opening thereof, there are provided at least a light source, an inner lens arranged in front of the direction in which light is emitted from the light source, and a direction in which the light is emitted from the inner lens. a first reflector arranged behind;
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces ,
The first reflector is provided to extend downward from the inner lens to a position facing the lower surface of the inner lens, and the light emitted from the lower surface of the inner lens is reflected forward by the first reflector. A vehicle lamp characterized by:
[2] At least a light source, an inner lens disposed in front of the light emitting direction of the light source, and a light emitting direction of the inner lens are provided in the lamp chamber defined by the housing and the outer lens covering the opening thereof. A first reflector arranged in the rear and a second reflector arranged in front of the direction in which light is emitted from the inner lens,
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces,
at least a part of the plurality of reflective surfaces are provided extending downward from the second reflector, and reflect light incident on the reflective surfaces forward from below the second reflector;
The vehicle lamp, wherein the second reflector protrudes in a longitudinal direction from an end portion of the inner lens, and reflects part of the light emitted from the plurality of emission surfaces.
[3] In a lamp chamber defined by a housing and an outer lens covering an opening thereof, at least a light source, an inner lens arranged in front of the light emitting direction from the light source, and a light emitting direction of the inner lens a first reflector arranged behind;
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces,
The vehicular lamp, wherein the plurality of reflective surfaces are glossy surfaces in which an inner surface of the housing has a reflective characteristic.
[4] In a lamp chamber defined by a housing and an outer lens covering an opening thereof, at least a light source, an inner lens disposed in front of the light emitting direction from the light source, and a light emitting direction of the inner lens are provided. a first reflector arranged behind;
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces,
A vehicle lamp, wherein at least part of the plurality of reflecting surfaces are curved in a convex or concave shape.
[5] In a lamp chamber defined by a housing and an outer lens covering an opening thereof, at least a light source, an inner lens arranged in front of the light emitting direction of the light source, and a light emitting direction of the inner lens are provided. a first reflector arranged behind;
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces,
The inner lens has a first reflecting surface that internally reflects light incident from the light source in a left-right direction perpendicular to the optical axis, and a light reflected internally by the first reflecting surface in an upward or downward direction perpendicular to the optical axis. and a second reflecting surface for internal reflection.
[6] The inner lens is an isosceles triangle centered on each of the light sources when viewed from the front, and the second reflecting surfaces are provided on the left and right oblique sides of the isosceles triangle. The vehicular lamp according to [5] above, characterized in that a surface is provided.
[ 7 ] A second reflector disposed in front of the direction of light emission from the inner lens,
[1] , [ 3] The vehicle lamp according to any one of [6] .
[ 8 ] Any one of [1] to [ 7 ] above, wherein at least a part of the plurality of reflecting surfaces is a light diffusing surface that diffuses and reflects light incident on the reflecting surfaces. The vehicle lamp according to .
[ 9 ] The vehicle lamp according to [ 8 ], wherein the light diffusing surface is a flute cut surface that diffuses light vertically .

As described above, according to the present invention, it is possible to provide a vehicular lamp capable of increasing the utilization efficiency of light from a light source and uniformly emitting light as a whole.

1 is a front view of a vehicle lamp according to the present invention; FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 3 is an enlarged detailed view of a B portion of FIG. 2; FIG. 3 is an enlarged detailed view of a C portion of FIG. 2; 1 is an exploded perspective view of main components of a vehicle lamp according to the present invention; FIG. 1 is a front view of a housing of a vehicle lamp according to the present invention; FIG. 1 is a front view of the inside of a housing of a vehicle lamp according to the present invention; FIG. FIG. 5 is a cross-sectional view taken along line DD of FIG. 4;

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a vehicle lamp according to the present invention, FIG. 2 is a cross-sectional view along the line AA of FIG. 1, FIG. 3 is an enlarged detailed view of the B portion of FIG. 2, and FIG. 4 is an enlarged detailed view of the C portion of FIG. 5 is an exploded perspective view of main components of the vehicle lamp, and FIG. 6 is a front view of the housing of the vehicle lamp. FIG. 7 is a front view of the interior of the housing of the vehicle lamp. FIG. 8 is a sectional view taken along line DD of FIG.

The vehicular lamp 1 according to the present embodiment is used as a lid lamp that is arranged on the left and right sides of the rear part of a vehicle. do.

As shown in FIGS. 1 and 2, a vehicle lamp 1 used as a lid lamp has a lamp chamber 4 defined by a housing 2 and a transparent outer lens 3 covering an opening thereof. LED socket 7 holding substrate 6 (see FIG. 3) on which this is mounted, first inner lens 8 arranged in front of LED 5 in the direction of light emission, and first inner lens 8 arranged behind first inner lens 8 1 reflector 9, a second reflector 10 arranged in front of the first inner lens 8, and a second inner lens 11 arranged in front of them. The LED socket 7 also serves as a heat sink with high heat dissipation.

As shown in FIGS. 5 and 7 , the first reflector 9 is provided extending downward from the first inner lens 8 to a position facing the lower surface (bottom surface) of the first inner lens 8 . A horizontally elongated reflecting surface 9 a that is inclined toward the front direction is formed at the center in the height direction on the front surface (front surface) of the first reflector 9 . A circular hole 9b is formed in the center of the width direction of the portion above the reflecting surface 9a of the first reflector 9, and the LED socket 7 is inserted into the circular hole 9b from the rear side and fixed. In addition, in each LED socket 7, the LED 5 is mounted on the substrate 6 so that the emitting direction thereof is the front direction (rear of the vehicle).

The second reflector 10 is arranged along the front surface of the first inner lens 8, as shown in FIGS. , this bent portion covers the first inner lens 8 from above. Further, the second reflector 10 is provided with a protruding portion 10A that protrudes in the longitudinal direction from one longitudinal end of the first inner lens 8 (the left end in FIGS. 2 and 4).

The first inner lens 8 and the second inner lens 11 are made of transparent resin such as acryl, polycarbonate, or the like, which has high light guiding properties. Here, as shown in FIG. 5, the first inner lens 8 is formed as an isosceles triangle centered on the LED 5 when viewed from the front.

Further, as shown in detail in FIG. 3 , at the longitudinal central portion of the rear surface of the first inner lens 8 facing the LED 5 , there is an incident surface 8 a having an arcuate convex curved surface centered on the optical axis Ax of the LED 5 . A planar incident surface 8b is formed around the incident surface 8a, and an arcuately convex reflecting surface 8c continuous from the edge of the tip of the incident surface 8b is formed. A conical concave portion 8d that opens toward the front with the optical axis Ax as the center is formed at the center position of the front surface of the first inner lens 8 in the width direction. ) constitutes the first reflecting surface.

Incidentally, in the isosceles triangle portion of the first inner lens 8, as shown in FIG. 5, a serrated second reflecting surface 8e is formed on the oblique side extending left and right from the vertex of the isosceles triangle. The bottom surface of the first inner lens 8 (the base of the isosceles triangle) constitutes an emission surface 8f from which light reflected by the second reflection surface 8e and emitted downward as described later is emitted. A plurality of saw-toothed optical cuts (not shown) for diffusing emitted light in the horizontal direction are formed over the entire length of the surface 8f. A reflecting surface 9a of the first reflector 9 is arranged below the output surface 8f of the first inner lens 8. As shown in FIG.

By the way, in the vehicle lamp 1 according to the present embodiment, one end in the width direction of the housing 2 (the left end in FIG. 2) has an arcuate convex surface protruding into the lamp chamber 4 due to the design of the vehicle body. Because of this, the first reflector 9 cannot be covered over the entire length of the first inner lens 8 from the rear side. As a result, a protruding portion 8A that protrudes in the longitudinal direction from the edge of the first reflector 9 is provided at one longitudinal end of the first inner lens 8 (the left end in FIGS. 2 and 4). The protruding portion 8A has a sloped first exit surface 8g cut obliquely, a concave second exit surface 8h connected to the first exit surface 8g, and a vertical exit surface 8h connected to the second exit surface 8h. A third exit surface 8i is formed as a surface.

Then, on the inner surface of the housing 2 (the inner surface of the portion facing the first to third output surfaces 8g to 8i of the first inner lens 8), from the first to third output surfaces 8g to 8i of the first inner lens 8, A plurality of reflecting surfaces 2a and 2b are provided for reflecting emitted light. Among the plurality of reflecting surfaces 2a and 2b, as shown in FIG. 4, the reflecting surface 2a formed on the inner surface perpendicular to the front surface of the housing 2 connected to the convex portion 2A of the housing 2 constitutes a flat surface. there is

On the other hand, as shown in FIGS. 4, 6 and 8, the reflecting surface 2b formed on the inner surface of the convex portion 2A is formed by arranging a plurality of horizontally extending flute cuts vertically. A light diffusing surface (hereinafter referred to as a light diffusing surface 2b) that reflects light incident on 2b while diffusing it in the vertical direction is configured. Further, the light diffusion surface 2b is provided extending downward from the second reflector 10. As shown in FIG. The light diffusion surface 2b is not limited to the convexly curved surface described above, and may be a concavely curved surface.

The housing 2 is black, and the reflecting surface 2a and the light diffusing surface 2b are formed by a mold polished to a roughness of ±5 μm. For this reason, the reflecting surface 2a and the light diffusing surface 2b are glossy surfaces in which the inner surface of the housing 2 has a reflective characteristic, so that light can be reflected. In addition, if the housing 2 is gray, the reflectance can be further increased.

In the vehicle lamp 1 configured as described above, when a current is supplied to the LED 5 from a power supply (not shown) such as a battery through the substrate 6 fixed to the LED socket 7 and the LED 5 emits light, the light is emitted from the front. emit toward Then, as shown in FIG. 3, the light emitted from the LED 5 toward the front enters the first inner lens 8 from the incident surfaces 8a and 8b of the first inner lens 8, and enters from the incident surface 8b. The light is reflected by the reflecting surface 8c and travels to the concave portion 8d, which is the first reflecting surface, as parallel light parallel to the optical axis Ax together with the light incident from the incident surface 8a. The light traveling toward the concave portion 8d of the inner lens 8 is reflected by the concave portion 8d (first reflecting surface), and its traveling direction is changed by 90°. proceed to

Light in the horizontal direction toward second reflecting surfaces 8e formed on the left and right oblique sides of the first inner lens 8, which is formed as an isosceles triangle when viewed from the front, is reflected by each of the second reflecting surfaces 8e. , the traveling direction is changed by 90° and directed downward, and emitted from the emission surface 8f on the bottom surface of the first inner lens 8. As shown in FIG. The light emitted downward from the emission surface 8f of the first inner lens 8 is diffused left and right by a plurality of optical cuts (not shown) formed on the emission surface 8f.

Light emitted downward from the emission surface 8f of the first inner lens 8 is reflected by the reflection surface 9a of the first reflector 9 shown in FIG. ) and passes through the transparent second inner lens 11 and the transparent outer lens 3, the reflecting surface 9a of the first reflector 9 emits light over the entire width, and the vehicle lamp 1 functions as a lid lamp. Light leaking from the rear and front surfaces of the first inner lens 8 to the outside is reflected by the first reflector 9 and the second reflector 10 and reenters the first inner lens 8 to be used by the vehicle lamp 1 for light emission. The efficiency of light utilization is enhanced because the

By the way, in the vehicle lamp 1 according to the present embodiment, as shown in FIGS. However, as shown in detail in FIG. 4, part of the light L1 traveling inside the first inner lens 8 exits from the first exit surface 8g of the first inner lens 8 while being refracted, and part of it The light L11 is reflected forward while diffusing upward and downward on the light diffusion surface 2b, reenters the inside of the first inner lens 8, is internally reflected by the first inner lens 8, and becomes a third light. The light is emitted from the emission surface 8i, reflected by the reflection surface 2a of the housing 2, and travels downward. The light L11 directed toward the light diffusing surface 2b of the housing 2 is reflected by the reflecting surface 2a of the housing 2 and directed downward. On the other hand, light traveling upward is reflected by the upper edge of the second reflector 10 and travels downward.

In this way, part of the light L1 is finally directed to the reflecting surface 9a (see FIG. 5) of the first reflector 9, reflected by this reflecting surface 9a, and directed to the front side (rear of the vehicle), and is transparent. The light passes through the second inner lens 11 and the outer lens 3 and is emitted to the rear of the vehicle.

Further, part of the light L12 diffusely reflected upward and downward by the light diffusion surface 2b is repeatedly reflected between the projecting portion 10A of the second reflector 10 and finally reflected by the first reflector 9. The light is directed toward the surface 9a (see FIG. 5), reflected by the reflecting surface 9a, directed toward the front side (vehicle rear), passes through the transparent second inner lens 11 and the outer lens 3, and exits toward the vehicle rear.

Some of the lights L2 and L3 traveling inside the first inner lens 8 are emitted from the second emission surface 8h and the third emission surface 8i of the first inner lens 8, and are repeatedly reflected to the housing 2. The light is directed toward the reflecting surface 2a and finally guided to the reflecting surface 9a of the first reflector 9 in the same manner as described above, so that the vehicle lamp 1 emits light.

Furthermore, as shown in FIG. 8, part of the lights L1, L2, and L3 emitted from the emission surfaces 8g to 8i of the first inner lens 8 are reflected while being diffused by the light diffusion surface 2b of the housing 2, and finally Specifically, the light is directed from below the second reflector 10 toward the front side (rear of the vehicle), passes through the transparent second inner lens 11 and the outer lens 3, and is emitted to the rear of the vehicle.

As described above, in the vehicle lamp 1 according to the present embodiment, even if the first inner lens 8 has a portion not covered by the first reflector 9, the first to third reflectors having different angles are present in this portion. Emission surfaces 8g to 8i are provided, and the inner surface of the housing 2 facing the first to third emission surfaces 8g to 8i is provided with a reflecting surface 2a and a light diffusing surface 2b.

As a result, part of the light emitted from each of the emission surfaces 8g to 8i of the first inner lens 8 is reflected by the reflection surface 2a of the housing 2 or diffused by the light diffusion surface 2b of the housing 2, and finally The light is directed toward the reflecting surface 9a of the first reflector 9, and emitted toward the rear of the vehicle through the reflecting surface 9a so that the vehicle lamp 1 emits light.

Part of the light emitted from each of the emission surfaces 8g to 8i of the first inner lens 8 is reflected while being diffused by the light diffusion surface 2b of the housing 2, and finally reaches the front side from below the second reflector 10. The light is emitted toward the rear of the vehicle and emitted toward the rear of the vehicle for light emission by the vehicle lamp 1 .

Therefore, according to the vehicle lamp 1 according to the present embodiment, the light emitted from the portion of the first inner lens 8 not covered by the first reflector 9 can be used for the light emission of the vehicle lamp 1 . It is possible to obtain the effect that the utilization efficiency of the light from the vehicular lamp 1 can be improved and the entire vehicle lamp 1 can emit light uniformly.

In the above description, the present invention is applied to a vehicle lamp used as a lid lamp. It goes without saying that the present invention can be similarly applied to arbitrary vehicle lamps.

DESCRIPTION OF SYMBOLS 1... Vehicle lamp 2... Housing 2A... Convex portion of housing 2a... Reflective surface of housing 2b... Light diffusion surface (reflecting surface) of housing 3... Outer lens 4... Lamp chamber 5... LED (light source) 6... Substrate 7... LED Socket 8... First inner lens 8A... Protruding portion 8a, 8b... Entrance surface of first inner lens 8c... Reflecting surface of first inner lens 8d... Concave portion (first reflecting surface) of first inner lens 8e... First inner lens Second reflecting surface of lens 8f to 8i Output surface of first inner lens 9 First reflector 9a Reflecting surface of first reflector 9b Circular hole of first reflector 10 Second reflector 10A Protruding portion 11 Third 2 inner lens Ax...optical axis

Claims (9)

In a lamp chamber defined by a housing and an outer lens covering an opening thereof, at least a light source, an inner lens arranged in front of the direction in which light is emitted from the light source, and an inner lens arranged in the rear in the direction of light emitted from the inner lens. and a first reflector;
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces ,
The first reflector is provided to extend downward from the inner lens to a position facing the lower surface of the inner lens, and the light emitted from the lower surface of the inner lens is reflected forward by the first reflector. A vehicle lamp characterized by: In a lamp chamber defined by a housing and an outer lens covering an opening thereof, at least a light source, an inner lens arranged in front of the direction in which light is emitted from the light source, and an inner lens arranged in the rear in the direction of light emitted from the inner lens. and a second reflector arranged in front of the direction of light emission from the inner lens ,
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces ,
at least a part of the plurality of reflective surfaces are provided extending downward from the second reflector, and reflect light incident on the reflective surfaces forward from below the second reflector;
The vehicle lamp , wherein the second reflector protrudes in a longitudinal direction from an end portion of the inner lens, and reflects part of the light emitted from the plurality of emission surfaces . In a lamp chamber defined by a housing and an outer lens covering an opening thereof, at least a light source, an inner lens arranged in front of the direction in which light is emitted from the light source, and an inner lens arranged in the rear in the direction of light emitted from the inner lens. and a first reflector;
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces ,
The vehicular lamp , wherein the plurality of reflective surfaces are glossy surfaces in which an inner surface of the housing has a reflective characteristic . In a lamp chamber defined by a housing and an outer lens covering an opening thereof, at least a light source, an inner lens arranged in front of the direction in which light is emitted from the light source, and an inner lens arranged in the rear in the direction of light emitted from the inner lens. and a first reflector;
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces ,
A vehicle lamp , wherein at least part of the plurality of reflecting surfaces are curved in a convex or concave shape . In a lamp chamber defined by a housing and an outer lens covering an opening thereof, at least a light source, an inner lens arranged in front of the direction in which light is emitted from the light source, and an inner lens arranged in the rear in the direction of light emitted from the inner lens. and a first reflector;
A plurality of emission surfaces are provided in a portion of the inner lens that protrudes in the longitudinal direction from the first reflector,
The inner surface of the housing is provided with a plurality of reflecting surfaces for reflecting the light emitted from the plurality of emitting surfaces ,
The inner lens has a first reflecting surface that internally reflects light incident from the light source in a left-right direction perpendicular to the optical axis, and a light reflected internally by the first reflecting surface in an upward or downward direction perpendicular to the optical axis. and a second reflecting surface for internal reflection . The inner lens is an isosceles triangle centered on each light source in front view, the second reflecting surface is provided on the left and right oblique sides of the isosceles triangle, and the output surface is provided on the base of the isosceles triangle. 6. The vehicular lamp according to claim 5 , wherein the vehicular lamp is a second reflector disposed in front of the direction in which light is emitted from the inner lens;
Claims 1 , 3, and 3 , wherein the second reflector protrudes in the longitudinal direction from the end portion of the inner lens and reflects part of the light emitted from the plurality of emission surfaces. 7. The vehicle lamp according to any one of 6 . The vehicular lamp according to any one of claims 1 to 7 , wherein at least part of the plurality of reflecting surfaces is a light diffusing surface that diffuses and reflects light incident on the reflecting surfaces. . 9. The vehicle lamp according to claim 8 , wherein the light diffusing surface is a flute cut surface that diffuses light vertically.

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