JP3151273U - Columnar reflection lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a columnar reflection lens capable of irradiating light from an LED attached to a heat radiating plate to the outside in a wide range. A columnar reflection lens 1 according to the present invention is characterized in that it collects light emitted from a light emitting portion and can irradiate a wide range in a lateral direction by a plurality of reflection surfaces 2 provided in the longitudinal direction of the lens. To do. Moreover, by changing the shape of the reflecting surface 2 and the cross-sectional shape of the columnar reflecting lens 1, various irradiation lights can be obtained. [Selection] Figure 1

Description

  The present invention relates to a columnar reflecting lens capable of irradiating light from a light source to the outside in a wide range in various lighting fixtures including light emitting diodes (LEDs).

  Bulb-type lighting fixtures using high-power LEDs of 1 W or more and lighting fixtures arranged in a straight line have been developed. However, in these LED lighting fixtures, a heat sink is indispensable for protection of LED elements and circuit elements. In the conventional filament type light bulb, the filament is attached to the central portion of the light bulb so that light is irradiated from the entire surface of the light bulb. Since it has to be attached to the position of the base of the light, there is a drawback that light is not sufficiently diffused.

Japanese Patent No. 3300778

  An object of the present invention is to provide a luminaire that eliminates the above-mentioned drawbacks by using a columnar reflection lens that collects light emitted from an LED and diffuses it at a position away from the light source.

Means to solve the problem

  In order to solve the above problems, the columnar reflecting lens of the present invention is characterized in that a plurality of reflecting surfaces for concentrating the light emitted from the light emitting part and reflecting the light in the side surface direction are provided in a plurality of column directions. To do. In addition, there exists said prior art document similar to this lens.

Effect of device

  As described above, by applying the columnar reflection lens, it is possible to provide a lighting fixture capable of irradiating the light of the LED attached to the heat sink at a position away from the light source. Furthermore, by selecting the shape and the number of steps of the reflecting surface according to the intensity of the light source and the like, it is possible to make various lighting fixtures from general lighting to decorative lighting.

It is sectional drawing of the cylindrical reflection lens of this invention. It is sectional drawing of the conical reflection lens of this invention. It is a partial cross section figure which shows the LED lighting fixture which is an Example of a cylindrical reflection lens. It is a partial cross section figure which comprised the cover in the cylindrical reflection lens lighting fixture. It is a partial cross section figure which shows the LED lighting fixture which is an Example of a conical reflection lens.

  Hereinafter, a columnar reflection lens according to the present invention will be described based on embodiments. The columnar reflection lens 1 shown in FIGS. 1 and 2 is characterized in that incident light (arrow line in the figure) from the lens bottom surface is irradiated in the side surface direction by a reflection surface 2 provided inside the lens. That is, light incident from the bottom surface of the lens propagates along the columnar lens, is reflected by the surface 2 provided in the columnar body, and is irradiated in the side surface direction of the lens.

  A plurality of reflecting surfaces 2 are provided, and the light reflected by the first stage is reflected in the second stage and further reflected by the third stage, so that all the light incident from the bottom is gradually reflected. Irradiated sideways and forward. In the figure, three reflecting surfaces are shown, but the number and interval of the reflecting surfaces are determined according to the light intensity and application of the light source.

  The reflecting surface 2 can be conical, pyramidal, exponential, V-shaped, or the like.

  The cross-sectional shape of the lens is circular or polygonal depending on the application, so that it is possible to obtain characteristic reflected light in each. In addition, the axial direction can be cylindrical as shown in FIG. 1 and conical as shown in FIG.

  FIG. 3 is an example of a cylindrical reflection lens LED lighting fixture in which the columnar reflection lens of the present invention is applied to a lighting fixture using a high-power LED that requires heat dissipation.

  In FIG. 3, the LED 3 is attached to the heat radiating plate 4 below the columnar lens 1, and light enters the lens from the bottom surface of the columnar lens 1. In the figure, reference numeral 6 denotes a holder for holding the lens, and in a material where it is desired to avoid lens deterioration due to heat, the heat of the heat sink is cut off. The light incident from the bottom surface can be irradiated in the lateral direction at a position away from the light source of the LED according to the principle described in FIGS. As described above, since the effect of moving the position of the light source can be obtained, diffused light similar to a conventional light bulb using a filament can be obtained.

  As a material of the columnar reflection lens 1, a light-transmitting material such as resin, glass, crystal, or the like is appropriate. Moreover, it can be set as the lighting fixture suitable for various uses by coloring a columnar lens. That is, the manufacturing cost can be greatly reduced without the need for a spherical shell glass unlike conventional light bulbs and light bulb type LED lighting.

  FIG. 4 shows the cylindrical reflective lens LED lighting fixture 8 of FIG. 3 provided with a cover 9. The cover 9 is made of resin, glass or the like, and the shape thereof may be spherical, cylindrical or cubic. it can. Moreover, the color tone of light can be changed by applying a fluorescent material to the cover.

FIG. 5 is an example of an LED lighting apparatus to which the conical reflection lens of FIG. 2 is applied. By making the columnar reflection lens into a conical shape, it can be applied to a high-illuminance lighting apparatus using a plurality of LEDs.
In the example of FIG. 5, by providing the base 10 suitable for an existing incandescent bulb in the power supply unit, it can be replaced with an incandescent bulb and power consumption can be reduced.

  The columnar reflection lens of the present invention is naturally applicable to a large number of LEDs arranged in a circle and a straight line.

DESCRIPTION OF SYMBOLS 1 Columnar reflection lens 2 Reflecting surface 3 Light emitting diode (LED)
4 heat sink 5 power supply circuit part 6 reflection lens holder 7 lighting fixture mounting plate 8 cylindrical reflection lens LED lighting fixture 9 cover 10 base

Claims (5)

  A columnar reflection lens in which a plurality of reflection surfaces for reflecting light emitted from a light emitting unit in a side surface direction are provided in a column direction.   The columnar reflecting lens according to claim 1, wherein the reflecting surface is a conical surface.   The columnar reflecting lens according to claim 1, wherein the reflecting surface is a pyramid surface.   The columnar reflecting lens according to claim 1, wherein the reflecting surface is a V-shaped surface.   The columnar reflection lens according to claim 1, wherein a light emitting diode is used as the light emitting portion.

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