JP4706862B2 - Marker lamp - Google Patents

Description

  The present invention relates to a marker lamp used as a mark or decoration used for a vehicle width, a side surface, a headlight or the like in a large vehicle such as a truck.

Conventionally, issuance diodes (LEDs) have been adopted for marker lamps, vehicle width lights, headlamps, and the like for reasons such as low power consumption and no fear of running out of a ball. In particular, when the driver makes a right or left turn, it is used as a mark for the side position of the car. To make it easier for the driver to see through the side mirror, the entire marker lamp as well as the side of the marker lamp can be illuminated uniformly. Various reflection mechanisms have been proposed internally and externally.
Among many marker lamps, there is a marker lamp provided with a reflection mechanism called a reflector, which is formed of a cylindrical metal or plastic inside the marker lamp and has a mirror-like finish on the entire surface (for example, see Patent Document 1). is there).

JP 2006-302758 A (paragraph 0042, FIG. 11)

FIG. 6 shows a conventional general marker lamp 100. In the marker lamp 100, as described above, the reflector 104, which is mirror-finished with plastic or metal, is provided in the center, and the reflector 104 is configured to reflect the side.
However, in this structure, since the LED (L100) has directivity, the reflected light S100 reflected in a point shape is reflected and reflected as the point light source of the LED (L100).
Further, half of the light from the LED (L100) is reflected by the reflector 104 (R100) and irradiated to the region T of the cover 102, but the reflector 104 reflects the light from the LED (L100) above the region T. Since it was impossible, it was difficult to make the entire cover 102 shine uniformly by the action of the reflector 104.

  Accordingly, an object of the present invention is to provide a marker lamp that can uniformly reflect light in any direction without unevenness.

The marker lamp according to claim 1, wherein the marker lamp is formed so as to cover a plurality of LEDs (L1, L2) serving as a light source, and transmits a light from the LEDs (L1, L2). And a lamp body (3, 23) to which the lamp cover (2, 22) is detachably mounted, and a marker lamp,
In the center of the marker lamp, a cylindrical diffusion sheet (4) for diffusing light from the LEDs (L1, L2) is provided upright perpendicular to the upper surface of the lamp body (3, 23),
The LED (L1, L2) includes an LED (L1) arranged in a state of surrounding the cylindrical outer surface (6) side of the diffusion sheet (4), and a cylindrical inner surface (7) side of the diffusion sheet (4). The LED (L2) arranged in the
The LED (L1) disposed in a state surrounding the cylindrical outer surface (6) side of the diffusion sheet (4) irradiates light toward the cylindrical outer surface (6) of the diffusion sheet (4), and The LED (L2) disposed on the cylindrical inner surface (7) side of the diffusion sheet (4) irradiates the cylindrical inner surface (7) of the diffusion sheet (4) with light .

With the above configuration, the diffusion sheet may reflect light from the LEDs arranged in a state of surrounding the cylindrical outer surface side of the diffusion sheet in a round band shape instead of a dot shape, on the entire cylindrical outer surface of the diffusion sheet. it can. Therefore, the marker lamp can obtain uniform reflected light without reflecting light in the form of dots, and can shine uniformly without unevenness. In addition, since the entire diffusion sheet can be used, light can be used efficiently, and light can be distributed throughout the lamp cover.
The LED disposed on the cylindrical inner surface side of the diffusion sheet irradiates light on the cylindrical inner surface of the diffusion sheet, transmits the light to the outer surface of the diffusion sheet, and faces the front surface of the outer surface. Irradiate with light. Therefore, the light from the LED arranged on the cylindrical inner surface side of the diffusion sheet can also be taken into the light reflected on the outer surface, and the brightness can be increased.
The cylindrical diffusion sheet is not limited to a cylindrical shape, and may have another shape.

The marker lamp according to claim 2, wherein the diffusion sheet (4) has a straight shape on the cylindrical inner surface (6) and a wavy shape for diffusely reflecting light on the cylindrical outer surface (6),
The extending direction of the irregularities of the wavy shape is a cylindrical circumferential direction of the diffusion sheet (4) .
With the above configuration, the diffusion sheet has a function of transmitting light from the cylindrical inner surface and reflecting light from the cylindrical outer surface.

The marker lamp according to claim 3, wherein the diffusion sheet (4) is fixed by a fixed base (5, 25) provided on an upper surface of the lamp body (3, 23) or a ceiling center of the lamp cover. It is characterized by that.

With the configuration described above , the fixed base functions as means for fixing the diffusion sheet upright and perpendicular to the upper surface of the lamp body in a cylindrical shape.

The marker lamp according to claim 4, wherein the LED (L1) arranged in a state of surrounding the cylindrical outer surface (6) side of the diffusion sheet (4) is disposed on the cylindrical outer surface (6) of the diffusion sheet (4). To be inclined
The LED (L2) arranged on the cylindrical inner surface (7) side of the diffusion sheet (4) is arranged to stand vertically to the center of the lamp body (3, 23) .

With the above configuration, since the lamp cover is not directly irradiated with spot-like light, spot-like light is not reflected on the lamp cover. Moreover, the effect | action of the said diffusion sheet can be exhibited more, and a marker lamp can be illuminated uniformly, without unevenness.

(The invention's effect)
  According to the above invention, it is possible to provide a marker lamp capable of reflecting light uniformly in all directions.

Example 1
A best mode for carrying out the present invention will be described below with reference to FIGS. 1 to 2 and FIG. FIG. 1 is a schematic view of the marker lamp 1 according to the present embodiment as viewed from the front, and FIG. 1B is a schematic view of the marker lamp 1 according to the present embodiment as viewed from above. FIG. 2 is a cross-sectional view taken along the line AA when the marker lamp 1 according to the first embodiment is viewed from the front. FIG. 4 is an enlarged cross-sectional view illustrating a state when the diffusion sheet 4 in the marker lamp 1 in Example 1 reflects light.

A marker lamp 1 shown in FIG. 1 includes a lamp cover 2 and a lamp body 3.
The lamp cover 2 is formed in a dome shape with a transparent resin or glass of yellow or orange, and light reflected from the diffusion sheet 4 or light of LEDs (L1 and L2) to be described later is formed on the inner surface of the lamp cover 2. The lens is cut to diffuse the light.
A groove (not shown) is provided inside the lamp cover 2 so as to be fitted to the lamp body 3 so that the lamp cover 2 can be rotated and fixed to the lamp body 3. Further, a waterproof packing is provided in the groove so that the lamp cover 2 is fitted.

  The lamp body 3 includes a fixed base 5, a substrate 11, and a diffusion sheet 4. The lamp body 3 is provided in a circular shape, and is provided with a hole (not shown) and a mounting mechanism (screw or bolt fixing hole) (not shown) for connecting the electric wiring from the vehicle body side to the vehicle body side. As shown in FIG. 1 (B), the fixing base 3 for fixing the diffusion sheet 4 is formed in a C-shaped columnar shape with a part cut away, and stands to sandwich and fix the diffusion sheet 4. The outer standing piece 8 and the inner standing piece 9 are provided, and the diffusion sheet 4 is sandwiched and fixed between the outer standing piece 8 and the inner standing piece 9.

As shown in FIGS. 1 and 2, the substrate 11 is formed in a disk shape, and is mounted with electronic components such as LEDs (L1), LEDs (L2), and resistors (not shown). Inside, a C-shaped hole in which the fixed base 5 can be fitted is provided.
The LEDs (L1) are arranged circumferentially so as to surround the diffusion sheet 4 and are attached to the substrate 11 with an inclination toward the outer surface of the diffusion sheet 4. The LED (L2) is mounted upright in the center of the disk with respect to the single lamp body 3. The LEDs (L1 and L2) are bullet-type LEDs and use yellow or white color.

Next, the diffusion sheet 4 is formed in a cylindrical shape by winding a resin sheet in a circular shape.
As shown in FIG. 4, the diffusion sheet 4 is configured in a shape that reflects differently on the outer surface 6 and the inner surface 7.
The outer surface 6 of the diffusion sheet 4 is formed with a surface having a very small wave shape that diffuses and reflects light from the outer surface 6, and the inner surface 7 has a straight surface so that light from the inner surface 7 side can be reflected. It has a transparent film structure.

Next, the lamp body 3 is assembled as follows.
First, the substrate 11 is fitted so as to be fitted onto the fixed base 5 from above, and then the cylindrical diffusion sheet 4 is fitted and fixed between the outer upright piece 8 and the inner upright piece 9 of the fixed base 5.
(Display operation and effect of marker lamp in the first embodiment)

The display operation of the marker lamp 1 according to the first embodiment will be described below with reference to FIGS. FIG. 3 is a diagram illustrating a state when the diffusion sheet 4 in the marker lamp 1 in Example 1 reflects light.
As shown in FIGS. 3 and 4, when light is emitted from the LED (L1) toward the outer surface 6 of the diffusion sheet 4, the light is emitted in the front direction with respect to the outer surface due to the wave shape of the outer surface 6 described above. Reflected (R1). Therefore, light can be diffusely reflected in the direction of the white arrow (R). And the diffusion sheet 4 reflects the light from LED (L1) in the whole diffusion sheet 4 not to a dot form but to a round strip | belt shape (S).

Next, since the light from the LED (L2) has a transparent film structure on the inner surface 7, the light entering from the inner surface 7 is refracted by the outer surface 6 and reflected in the front direction with respect to the outer surface 6. (R2).
Further, since the LED (L2) is provided so as to stand vertically with respect to the lamp body 3, light is irradiated toward the ceiling of the lamp cover 2.

The effect grasped from the present embodiment will be described in detail below.
(1) When the light from the LED (L1) is irradiated toward the outer surface 6 of the diffusion sheet 4 in the marker lamp 1 of this embodiment, the light is in the front direction with respect to the outer surface due to the wave shape of the outer surface 6 described above. The light is reflected on (R1). Therefore, light can be diffusely reflected in the direction of the white arrow (R).

And the diffusion sheet 4 reflects the light from LED (L1) in the whole diffusion sheet 4 not to a dot form but to a round strip | belt shape (S).
Therefore, uniform reflected light can be obtained without reflecting the light in the form of dots. Moreover, since the whole diffusion sheet 4 can be utilized, light can be used efficiently and light can be distributed throughout the lamp cover 2.

(2) In addition to the effects of (1), the marker lamp 1 of the present embodiment has the lamp cover 2 evenly close to the ceiling of the lamp cover 2 by the cylindrical diffusion sheet 4 extending to the vicinity of the ceiling of the lamp cover 2. It became possible to shine evenly.

(3) In addition to the effects of (1) and (2), the marker lamp 1 of the present embodiment is such that the inner surface 7 transmits light from the LED (L2) irradiated toward the inner surface 7 of the diffusion sheet 4. Therefore, the light that has entered from the inner surface 7 is refracted by the outer surface 6 and reflected in the front direction with respect to the outer surface 6 (R2).
Therefore, the light from the LED (L2) irradiated toward the inner surface 6 of the diffusion sheet 4 can also be taken into the light reflected by the outer surface 6 and can work to increase the luminance.

(4) In addition to the effects of (1) to (3), the marker lamp 1 of the present embodiment is provided with the LED (L2) standing upright with respect to the lamp body 3. Light is also emitted toward the ceiling.
Accordingly, when the lamp cover 2 is viewed from the ceiling, the marker lamp 1 can be clearly lit.

(5) Like the conventional reflector structure, there is a problem that the manufacturing cost increases because the surface of the reflector must be mirror-finished. However, the marker lamp 1 of this embodiment uses the diffusion sheet 4. By doing so, it is not necessary to mirror-finish the surface and it can be manufactured at low cost.

(6) In addition to the effects (1) to (5), in the marker lamp 1 of this embodiment, the LED (L1) is provided with the center of the LED (L1) tilted toward the cylindrical diffusion sheet 4. Because
Since the lamp cover 3 is not directly irradiated with spot-like light, the lamp cover 3 is not projected with spot-like light. Moreover, the effect | action of the diffusion sheet 4 can be exhibited more, and the marker lamp 1 can be illuminated uniformly without unevenness.
(Example 2)

A second embodiment of the best mode for carrying out the present invention will be described below with reference to FIG.
The structure of the diffusion sheet 4 is omitted because it is the same as that in the first embodiment, and the display operation and effect of the marker lamp in the first embodiment are also omitted because they are the same.

FIG. 5 is a schematic view of the marker lamp 1 according to the second embodiment as viewed from the front.
As shown in FIG. 5, the marker lamp 1 includes a lamp body 23 and a lamp cover 22. The lamp body 23 is provided with a substrate 21, and LEDs (L 1) are arranged on the substrate 21 in a circumferential shape as in the first embodiment. Further, an LED (L2) is provided in the center of the disk-shaped substrate 21 in the same manner as in the first embodiment.

Next, the lamp cover 22 is formed in a dome shape with a transparent resin or glass of yellow or orange, and the inner surface of the lamp cover 22 is reflected from the light of the LEDs (L1 and L2) or from the diffusion sheet 4. A lens cut is applied to diffuse the light.
A transparent cylindrical fixed base 25 is provided at the center of the dome-shaped ceiling of the lamp cover 2. The fixing base 25 for fixing the diffusion sheet 4 is formed in a columnar shape, and is provided with an outer standing piece 8 and an inner standing piece 9 that are erected to sandwich and fix the diffusion sheet 4. The diffusion sheet 4 is sandwiched and fixed with the inner standing piece 9.
(Effect of marker lamp in Example 2)

The effect grasped from the present embodiment will be described in detail below. In addition to the effects of the first embodiment, the effects of the present embodiment are as follows.
(1) The marker lamp 1 according to the present embodiment is provided with a fixing base for fixing the diffusion sheet 4 (reflecting mechanism (which may be a reflector in the conventional example)) in the lamp cover 22 so that the substrate 21 is mounted. Since it can manufacture without processing according to a fixed base like Example 1, cost becomes low.

(2) The marker lamp 1 of the present embodiment is provided with a diffusion sheet 4 (reflection mechanism (which may be a reflector in the conventional example)) in the lamp cover 22 and the diffusion sheet 4 (reflection mechanism (in the conventional example). By forming the fixed pedestal 25, which is a fixing means)) with a transparent material, the light of the LED 2 is transmitted not only through the ceiling of the lamp cover 22 but also through the transmissive part through the transmissive part. It can be used in the front direction of the outer surface 6 which is the side direction.
(Examples of changes to other embodiments)

The example which changed embodiment described above into other embodiment is shown below.
The LED (L2) has been described as being provided on the same substrate as L1, but it may be a structure provided separately as a separate substrate.
-Although LED of the bullet-shaped shape was used for LED, a chip-type thing may be used.
The fixed base 25 may be structured to be integrally formed with the lamp cover 2.
・ Cylinders include cones, triangular pyramids and box shapes.
-The diffusion sheet 4 is good to be used for the backlight of the liquid crystal used for a computer screen or television. In addition, the reflection type may be a retroreflection type or an irregular reflection type.
The diffusion sheet 4 is formed in a circular shape, but may be a polygon such as a quadrangle or a triangle.
-As a method of fixing the diffusion sheet 4 in a cylindrical shape, adhesion, fixing with a transparent tape, or fixing by heat can be considered.

The schematic diagram which looked at the marker lamp 1 in Example 1 from the front. (B) The schematic diagram which looked at the marker lamp 1 in this Embodiment from upper direction. FIG. 3 is a cross-sectional view taken along the line AA when the marker lamp 1 according to the first embodiment is viewed from the front. The figure showing the state when the diffusion sheet 4 in the marker lamp 1 in Example 1 reflects light. FIG. 3 is an enlarged cross-sectional view illustrating a state when the diffusion sheet 4 in the marker lamp 1 in Example 1 reflects light. The schematic diagram which looked at the marker lamp 1 in Example 2 from the front. The figure showing the state when the reflector 104 in the conventional marker lamp 100 reflects light.

Explanation of symbols

1 ... marker lamp, 2, 22 ... lamp cover, 3, 23 ... lamp body,
4 ... diffusion sheet, 5, 25 ... fixed base, 6 ... outer surface, 7 ... inner surface,
11 ... Printed circuit board, R, R1, R2 ... Reflected light,
L1, L2, L100 ... LED.

Claims (4)

A marker lamp formed by covering a plurality of LEDs serving as a light source, and comprising a dome-shaped lamp cover that transmits light from the LEDs, and a lamp body to which the lamp cover is detachably attached. ,
In the center of the marker lamp, a cylindrical diffusion sheet for diffusing light from the LED is provided upright perpendicular to the upper surface of the lamp body,
The LED is composed of an LED arranged in a state surrounding the cylindrical outer surface side of the diffusion sheet, and an LED arranged on the cylindrical inner surface side of the diffusion sheet,
The LED arranged in a state surrounding the cylindrical outer surface side of the diffusion sheet irradiates light toward the cylindrical outer surface of the diffusion sheet, and the LED arranged on the cylindrical inner surface side of the diffusion sheet, Irradiate the cylindrical inner surface of the diffusion sheet with light,
This is a marker lamp. The diffusion sheet has a straight shape on the cylindrical inner surface and a wave shape for diffusing and reflecting light on the cylindrical outer surface,
The direction in which the unevenness of the wavy shape extends is the cylindrical circumferential direction of the diffusion sheet.
The marker lamp according to claim 1 . The diffusion sheet is fixed by a fixed base provided on the upper surface of the lamp body or the ceiling center of the lamp cover.
The marker lamp according to claim 1 or 2, wherein The LEDs arranged in a state surrounding the cylindrical outer surface side of the diffusion sheet are arranged to be inclined toward the cylindrical outer surface of the diffusion sheet,
The LED arranged on the cylindrical inner surface side of the diffusion sheet is arranged to stand vertically to the center with respect to the lamp body.
The marker lamp according to any one of claims 1 to 3, wherein the marker lamp is provided.

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