JP7420638B2 - Vehicle lights - Google Patents

Description

The present invention relates to a vehicle lamp having a linear light emitting section.

Vehicle lighting devices such as turn lamps and daytime running lamps (DRLs) employ a structure in which a light guide rod is attached to a reflector. In other words, a vehicle lamp that emits light toward the front of the vehicle includes a light guide rod made of transparent resin that extends in the width direction of the vehicle, a reflector that supports the light guide rod, and a white light emitting device provided at both ends of the light guide rod. It is composed of an LED board having a diode (LED) element, and an inner lens that emits light from the LED element to the front of the vehicle via a light guide rod. Conventionally, in order to expand the visible range of the light emitted from the inner lens toward the center of the vehicle, a generally semicylindrical, spherical, or aspherical lens cut surface was provided on the portion of the inner lens that faces the light guide rod (light emitting section). establish. In this way, when the light guide rod (light emitting part) and the lens cut surface of the inner lens are provided to face each other, the luminous intensity on the vehicle center side increases (see Patent Document 1).

Japanese Patent Application Publication No. 2015-130264

However, in the above-mentioned conventional vehicle lamp, the light guide rod (light emitting part) and the lens cut surface of the inner lens overlap when viewed from the front of the vehicle. Since the size is almost the same as that of the light rod, there is a problem that the design quality is affected and the design quality is inferior.

In order to solve the above-mentioned problems, a vehicle lamp according to the present invention that emits light toward the front of the vehicle or the rear of the vehicle extends in the vehicle width direction and extends toward the rear or front of the vehicle from the center of the vehicle toward the side of the vehicle. a curved linear light emitting section; a first inner lens that covers the front side of the vehicle or the rear side of the linear light emitting section; and a first inner lens that is provided on the rear side of the vehicle or the front side of the vehicle and receives light from the linear light emitting section. It has a lens-cut entrance surface for light emitting, and a lens-cut exit surface provided on the front side of the vehicle or the rear side of the vehicle for emitting light, and further refracts the light from the linear light emitting part toward the center of the vehicle and emits it. The first inner lens is provided with a clear portion through which the light emitted from the linear light emitting portion is transmitted, at a position overlapping the linear light emitting portion when viewed from the front, and the first inner lens is provided with a clear portion through which light emitted from the linear light emitting portion is transmitted. The lens is located in a part of the extending direction of the linear light emitting part and below or above the clear part, and extends in the extending direction of the linear light emitting part, and is located in the vehicle vertical direction of the second inner lens. is smaller than the vertical width of the first inner lens when viewed from the front of the vehicle, and the slope of the exit reference line of the lens-cut exit surface is different from the slope of the entrance reference line of the lens-cut entrance surface; The cut entrance surface is composed of a prism array having an entrance surface formed to refract the incident light at a narrow angle, and the lens cut exit surface has an exit surface formed to refract the emitted light at a wide angle. It is composed of a prism array .

According to the present invention, since the second inner lens occupies a small proportion of the entire inner lens, it does not affect the design, and therefore the design is not hindered much.

1 shows a first embodiment of a vehicle lamp according to the present invention, in which (A) is an exploded perspective view and (B) is an enlarged perspective view of an inner lens. FIG. 2 is an assembled perspective view of the vehicle lamp of FIG. 1; FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 for explaining light distribution control in a vertical cross section by the first and second inner lenses in FIG. 2; FIG. 3 is a view taken along line BB in FIG. 2, in which (A) is a sectional view taken along line BB, and (B) is an enlarged perspective view of the innan lens in (A). FIG. 3 is a diagram for explaining light distribution control in a horizontal cross section by the second inner lens in FIG. 2, in which (A) is a diagram showing an incident reference line and an output reference line of the second inner lens, and (B) is a diagram showing the incident reference line and output reference line of the second inner lens. FIG. 7 is a diagram showing the irradiation angle of the emitted light from the emitting surface of the second inner lens. 3 is a diagram for explaining the results of ray tracing from the light guide rod in FIG. 2, in which (A) shows the results of ray tracing from the light guide rod, and (B) shows the light distribution characteristic standard of a vehicle lamp. FIG. FIG. 3 is a diagram for explaining the design of the second innan lens in FIG. 2; FIG. 3 is a sectional view showing a second embodiment of the vehicle lamp according to the present invention.

FIG. 1 shows a first embodiment of a vehicle lamp according to the present invention, in which (A) is an exploded perspective view and (B) is an enlarged perspective view of an inner lens.

In FIG. 1A, a vehicle lamp installed on the front left side of a vehicle and extending in the vehicle width direction includes a light guide rod 1 made of a transparent resin such as polycarbonate resin, and an opaque resin such as polycarbonate made of aluminum. A reflector 2 having a mirror surface deposited with the like, an LED board 3-1, 3-2 having a white light emitting diode (LED) element fixed to the side of the reflector 2 with screws, and a light guide rod 1. It is composed of a first inner lens 4, a second inner lens 5, and an outer lens 6 (see FIG. 3) that emit light from the LED boards 3-1 and 3-2 toward the front of the vehicle. Note that the light guide rod 1 and the LED boards 3-1 and 3-2 constitute a linear light emitting section. Further, in the vehicle lamp shown in FIG. 1, substantially effective illumination is provided between the lamp end T1 and the lamp end T2. Furthermore, the vehicular lamp provided on the right side of the front portion of the vehicle is symmetrical with the vehicular lamp shown in FIG. Furthermore, either one of the LED boards 3-1 and 3-2 may be used.

As shown in FIG. 1A, the light guide rod 1 extends in the vehicle width direction, and curves toward the rear of the vehicle (slant) as it goes from the center of the vehicle (right side of the vehicle) to the side of the vehicle (left side of the vehicle). are doing. The first inner lens 4 covers the vehicle front side of the light guide rod 1. The second inner lens 5 extends toward the right side of the vehicle (towards the center of the vehicle) within the first inner lens 4 and below the first inner lens 4 .

As shown in FIG. 1B, the second inner lens 5 has an inner lens cut surface 5-1 on the rear side of the vehicle, that is, on the light guide rod 1 side. The inner lens cut surface 5-1 is composed of a triangular prism array consisting of a plurality of pairs of sloped surfaces along the vehicle vertical direction, and one of each pair of sloped surfaces facing toward the left of the vehicle acts as the entrance surface 5-1a. . Further, the second inner lens 5 has an outer lens cut surface 5-2 on the vehicle front side, that is, on the outer lens 6 side. The outer lens cut surface 5-2 is constituted by a triangular prism array consisting of a plurality of pairs of inclined surfaces along the vehicle vertical direction, and one of each pair of inclined surfaces facing toward the left of the vehicle acts as an exit surface 5-2a. . Furthermore, the second inner lens 5 has flat exit surfaces 5-3 and 5-4 on both sides of the outer lens cut surface 5-2. In this case, the outer lens cut surface 5-2 and the plane exit surfaces 5-3 and 5-4 protrude toward the front of the vehicle in a ``he'' shape.

2 is a perspective view of an assembled part of the vehicle lamp shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA for explaining light distribution control in a vertical section by the first and second inner lenses in FIG. 4 is a view taken along the line BB in FIG. 2, in which (A) is a sectional view taken along the line BB, and (B) is an enlarged perspective view of the innan lens in (A). 2, 3, and 4, 6 is an outer lens, 7 is an extension as a partition wall fixed to a housing (not shown), 8 is a housing, and 9 is a front grill.

As shown in FIG. 3, the entrance surface 5-1a of the inner lens cut surface 5-1 of the second inner lens 5 is inclined in the direction away from the light guide rod 1, and the outer lens cut surface 5 of the second inner lens 5 is inclined in the direction away from the light guide rod 1. The output surface 5-2a of -2 is vertical, that is, parallel to the vertical direction. The light L1 that directly contributes to light distribution from the light guide rod 1 passes through the first inner lens 4, especially the clear portion 4a, and the light L2 that contributes to the light distribution toward the center of the vehicle from the light guide rod 1 passes through the inclined incident surface 5- 1a and the second inner lens 5 formed by the vertical exit surface 5-2a. In this case, as shown in FIGS. 3 and 4A, the second inner lens 5 has a structure in which the lower part of the first inner lens 4 extends in the longitudinal direction of the vehicle. The width of the inner lens 5 in the vehicle vertical direction is small. As a result, when the vehicle is viewed from the front, the vertical width of the second inner lens 5 is smaller than the vertical width of the first inner lens 4, for example, 1 of the entire vertical width of the inner lenses 4 and 5. /3 or less. Therefore, the second inner lens 5 does not interfere much with the design.

As shown in FIG. 4B, in the second inner lens 5, the inner lens cut surface 5-1 of the entrance surface has an entrance surface 5-1a formed to refract the incident light at a narrow angle. The outer lens cut surface 5-2 of the exit surface has an exit surface 5-2a formed to refract the emitted light at a wide angle. As a result, the irradiation angle θ1 of the light that enters the inner lens cut surface 5-1 from the light guide rod 1 and exits from the outer lens cut surface 5-2 can be set to 45 degrees. On the other hand, the irradiation angles θ2 and θ3 of the light entering the inner lens cut surface 5-1 from the light guide rod 1 and exiting from the flat output surfaces 5-3 and 5-4 are 30° or more and less than 45°, that is, 30°≦ θ2(θ3)<45°.

Next, light distribution control in a horizontal section by the second inner lens 5 will be described in detail with reference to FIG.

As shown in FIG. 5A, the slope of the output reference line OL1 of the outer lens cut surface 5-2 is smaller than the slope of the input reference line IL of the inner lens cut surface 5-1. Therefore, as shown in FIG. 5B, the angle of the exit surface 5-2a of the outer lens cut surface 5-2 is set smaller than the angle of the entrance surface 5-1a of the inner lens cut surface 5-1. There is. As a result, the irradiation angle of the light emitted from the outer lens cut surface 5-2 is larger than the emission angle of the light emitted from the light guide rod 1, and the irradiation angle θ1 of the outer lens cut surface 5-2 is the viewing angle. For example, it can be set to 45° as necessary to widen the angle.

As shown in FIG. 5A, the slope of the output reference line OL2 of the flat output surface 5-3 is greater than the slope of the input reference line IL of the inner lens cut surface 5-1. Therefore, as shown in FIG. 5B, the angle of the plane exit surface 5-3 is larger than the angle of the entrance surface 5-1a of the inner lens cut surface 5-1. Therefore, the irradiation angle θ2 of the flat emission surface 5-3 is between the emission angle of the light emitted from the light guide rod 1, for example, 30 degrees, and the emission angle of the outer lens cut surface 5-2, for example, 45 degrees, that is, 30 degrees. °≦ θ2 <45°. In this way, the presence of the plane exit surface 5-3 makes it possible to make the luminous intensity distribution uniform.

As shown in FIG. 5A, the slope of the output reference line OL3 of the flat output surface 5-4 is smaller than the slope of the input reference line IL of the inner lens cut surface 5-1, and It is smaller than the slope of the reference line OL2. Also in this case, as shown in FIG. 5B, the angle of the plane exit surface 5-4 is larger than the angle of the entrance surface 5-1a of the inner lens cut surface 5-1. As a result, the irradiation angle θ3 of the flat output surface 5-4 is between the output angle of the light emitted from the light guide rod 1, for example 30°, and the output angle θ2 of the flat output surface 5-3, that is, 30°<θ3 <θ2. In this manner, the presence of the plane exit surface 5-4 prevents the light emitted from the outer lens cut surface 5-2 from hitting the lamp end T1 and the front grill 9, thereby improving light extraction efficiency.

FIG. 6 is a diagram for explaining the ray tracing results from the light guide rod 1 in FIG. 2, in which (A) shows the ray tracing results from the light guide rod 1, and (B) shows the light distribution characteristics of the vehicle lamp. Indicate standards.

The 80° light distribution characteristic outside the vehicle in (B) of FIG. 6 is as shown in (A) of FIG. This can be achieved by curving (slanting) according to the following. On the other hand, the 45° light distribution characteristic inside the vehicle shown in FIG. 6(B) can be realized by the second inner lens 5 according to the present invention.

FIG. 7 is a sectional view for explaining the design of the second inner lens shown in FIG.

As shown in FIG. 7, when viewed from the front, the light guide rod width W1 of the light guide rod 1 is larger than the lens cut width W2 of the second inner lens 5, which is provided with a lens cut. Further, the second inner lens 5 is provided above or below the first inner lens so as not to overlap the light guide rod width W1 of the light guide rod 1 when viewed from the front. For example, the ratio W2/(W1+W2) is about 1/3. Therefore, the second inner lens 5 has little influence on the design of the vehicle lamp, and the design does not deteriorate.

FIG. 8 is a sectional view showing a second embodiment of the vehicle lamp according to the present invention.

In FIG. 8, instead of the light guide rod 1 and the LED boards 3-1 and 3-2 of FIG. 1, an LED board 3 in which a plurality of LED elements 3a are linearly arranged is provided as a linear light emitting section. Note that the reflector 2' is for preventing the light from the LED board 3 from directly irradiating the first inner lens 4 and the second inner lens 5, and acts as a light shielding part.

Also in FIG. 8, the light distribution control in the vertical and horizontal sections is performed by the inner lens in FIGS. 1 to 5.

In the embodiment described above, the second inner lens 5 is provided below the first inner lens 4, but the second inner lens 5 may also be provided above the first inner lens 4. For example, it is provided above the clear portion 4a of the first inner lens 4 in FIG.

Further, in the above-described embodiment, the first inner lens 4 and the second inner lens 5 may be formed separately and combined with adhesive, and a part of the first inner lens 4 may have a plate thickness. It is also possible to form a protrusion that protrudes further than the protrusion, and integrally mold an inner lens cut surface or an outer lens cut surface at the tip of this protrusion.

Furthermore, in the embodiments described above, the vehicle lamp according to the present invention irradiates light to the front of the vehicle, but the vehicle lamp according to the present invention may also irradiate light to the rear of the vehicle. In this case, the linear light emitting section curves toward the front of the vehicle, the first inner lens covers the rear side of the linear light emitting section, and the incident surface of the second inner lens receives light from the front side of the vehicle. However, the exit surface of the second inner lens emits light toward the rear of the vehicle.

Furthermore, although an LED element is used as a light emitting element, other light emitting elements such as a laser diode (LD) element may be used.

Moreover, the invention may be applied to any modifications within the obvious scope of the embodiments described above.

INDUSTRIAL APPLICABILITY The present invention can be applied to various vehicle lights having linear light emitting parts, such as front lamps, rear lamps, side lamps, turn lamps, DRLs, stop lamps, tail lamps, and the like. Further, the present invention can be used not only for vehicles but also for general purpose lighting having a linear light emitting section.

1: Light guide rod 2: Reflector 3-1, 3-2, 3: LED board 4: First inner lens 5: Second inner lens 5-1: Inner lens cut surface 5-1a: Reflective surface 5- 2: Outer lens cut surface 5-2a: Reflective surface 5-3, 5-4: Flat exit surface 6: Outer lens 7: Extension 8: Housing 9: Front grill T1, T2: Lamp end W1: Light guide rod width W2: Second inner lens width

Claims (10)

A vehicle lamp that emits light toward the front of the vehicle,
a linear light emitting portion extending in the vehicle width direction and curving toward the rear of the vehicle as it goes from the center of the vehicle to the side of the vehicle;
a first inner lens that covers the vehicle front side of the linear light emitting section;
The linear light emitting section has a lens cut entrance surface provided on the rear side of the vehicle for receiving light from the linear light emitting section, and a lens cut exit surface provided on the front side of the vehicle for outputting the light. and a second inner lens that further refracts the light toward the center of the vehicle and emits the light.
The first inner lens includes a clear part through which light emitted from the linear light emitting part passes through, at a position overlapping the linear light emitting part when viewed from the front,
The second inner lens is located in a part of the extending direction of the linear light emitting part and below or above the clear part, and extends in the extending direction of the linear light emitting part,
The width of the second inner lens in the vertical direction of the vehicle is smaller than the width of the first inner lens in the vertical direction when the vehicle is viewed from the front,
The slope of the exit reference line of the lens-cut exit surface is different from the slope of the entrance reference line of the lens-cut entrance surface,
The lens cut entrance surface is composed of a prism array having an entrance surface formed to refract incident light at a narrow angle,
The lens cut exit surface is composed of a prism array having an exit surface formed to refract the emitted light at a wide angle.
Vehicle lighting. The second inner lens is provided at a position that does not partially overlap with the linear light emitting section when viewed from the front, and an output surface of the second inner lens projects toward the front of the vehicle. Vehicle lighting. A vehicle lamp that emits light to the rear of the vehicle,
a linear light emitting portion extending in the vehicle width direction and curving toward the front of the vehicle as it goes from the center of the vehicle to the side of the vehicle;
a first inner lens that covers the vehicle rear side of the linear light emitting section;
The linear light emitting section has a lens cut entrance surface provided on the front side of the vehicle for receiving light from the linear light emitting section, and a lens cut exit surface provided on the rear side of the vehicle for outputting the light. and a second inner lens that further refracts the light toward the center of the vehicle and emits the light.
The first inner lens includes a clear part through which light emitted from the linear light emitting part passes through, at a position overlapping the linear light emitting part when viewed from the front,
The second inner lens is located in a part of the extending direction of the linear light emitting part and below or above the clear part, and extends in the extending direction of the linear light emitting part,
The width of the second inner lens in the vertical direction of the vehicle is smaller than the width of the first inner lens in the vertical direction when the vehicle is viewed from the front,
The slope of the exit reference line of the lens-cut exit surface is different from the slope of the entrance reference line of the lens-cut entrance surface,
The lens cut entrance surface is composed of a prism array having an entrance surface formed to refract incident light at a narrow angle,
The lens cut exit surface is composed of a prism array having an exit surface formed to refract the emitted light at a wide angle.
Vehicle lighting. The second inner lens is provided at a position that does not partially overlap the linear light emitting section when viewed from the front, and an output surface of the second inner lens projects toward the rear of the vehicle. Vehicle lighting. 4. The vehicular lamp according to claim 1, wherein the lens-cut entrance surface and the lens-cut exit surface are formed by a triangular prism array extending in the vertical direction of the vehicle. 4. The vehicular lamp according to claim 1, wherein the second inner lens has first and second planar exit surfaces adjacent to the lens cut exit surface. The lens cut entrance surface is inclined in a direction away from the linear light emitting part in the vehicle vertical direction,
4. The vehicular lamp according to claim 1, wherein the lens cut exit surface is parallel to the vertical direction of the vehicle. 4. The vehicle lamp according to claim 1, wherein the second inner lens is integrally formed with the first inner lens. 4. The vehicle lamp according to claim 1, wherein the linear light emitting section includes a light guide rod and a light emitting element provided at at least one end of the light guide rod. 4. The vehicle lamp according to claim 1, wherein the linear light emitting section includes a plurality of light emitting elements arranged in a linear manner.

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