JPS6310404A - Spot lighting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a spot illumination device for local illumination used in stores and the like, and particularly to a non-power type spot illumination device.

<Conventional technology> In general, commercial lighting in stores is configured by combining general lighting that illuminates the entire store with moderate illuminance, and local lighting that illuminates individual products in showcases and the like. There is.

Conventionally, spotlights with incandescent light bulbs as the light source have been used for this local lighting, creating locally high-illuminance areas among a large number of displayed items to make specific displayed items stand out and increase the display effect. <Problems to be Solved by the Invention> However, spot lighting devices with such a conventional configuration require electric power for the incandescent light bulb as a light source, and due to the heat emitted by the incandescent light bulb, There is a problem in that the temperature of the displayed items may rise and deteriorate.

Means for Solving the Problems> The present invention was made to solve the above problems, and includes a number of condenser lenses whose respective optical axes are arranged radially and condense external light; a radiator located at a position where the light beams from the plurality of condensing lenses converge, and makes these rays incident on one end and emitted from the other end; and a radiator provided between the plurality of condensing lenses and the radiator. an annular optical path bending means for bending the light beams from the plurality of condensing lenses toward the radiator; an optical cable for receiving the light emitted from the radiator and transmitting the light; and a light beam transmitted through the optical cable. This is a spot illumination device equipped with an irradiation means for irradiating the spot light.

Function> The present invention is configured as described above, and the spot illumination device condenses external light around the device using a large number of condensing lenses over the entire circumference, and converts the condensed light beam into a bundle of condensed rays. is bent toward the radiator by the optical path bending means, and each bundle of light rays is converged and incident on one end of the radiator.

The light beam incident on the radiator is emitted from the other end of the radiator, and the light beam is transmitted by an optical cable and is irradiated onto the object by the irradiation means.

<Example> An example of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a spot illumination device, which includes a large number of condensing lenses 5, an annular prism 10 as an optical path bending means, a radiator 15, an optical cable 20, an irradiation lens 25 as an irradiation means, and the above-mentioned condenser lens. 5. Annular prism 10. In the embodiment, the condenser lens 5 is composed of a base body 30 that fixes the radiator 15 at a predetermined position, and has a lens diameter of 3.
It is a convex lens with a focal length of 180 mm and a focal length of 180 mm, and 24 condenser lenses 5 are arranged in an annular shape so that their respective optical axes are radial, and are fixed to the outer frame portion 32 of the base body 30. There is.

In the embodiment, the annular prism 10 is a reflective prism having a triangular cross section, and its planar shape is formed into the same number of polygons as the number of condensing lenses 5, that is, a 24-gon shape. The annular prism 10 is fixed to the inner frame portion 34 of the base body 30, and each reflective surface directs the beam of external light incident on each condenser lens 5 to the radiator 15 disposed below. It is shaped to reflect light.

In the embodiment, the radiator 15 is a cylindrical member made of a glass material, and a fine lattice-like radiation surface 16 is formed on the lower end surface. The radiator 15 is disposed at a position where the bent light beams of each condenser lens 5 converge, and is fixed to the lower frame portion 36 of the base body 30. The light beam incident on the radiator 15 undergoes total reflection on the side wall of the radiator 15, and is reflected on the radiation surface 16.
The radiation is guided to the radiation surface 16 and is formed to radiate from the radiation surface 16.

The optical cable 20 is a flexible light-conducting member that covers multi-core optical fibers with a covering material, and is formed to a predetermined length, with one end connected to the radiation surface 1 of the radiator 15 at the lower frame portion 36.
6 and are fixed oppositely to each other. The emitted light from the radiation surface 16 is incident on one end of the optical cable 20, transmitted within the optical cable 20, and radiated toward the irradiation lens 25 disposed at the other end of the optical cable 20.

The irradiation lens 25 includes two lenses 26 and 27 in the embodiment.
and a lens barrel 28 that supports lenses 26 and 27 and is capable of adjusting the distance between both lenses. By adjusting the distance between the lenses 26 and 27, the light rays emitted from the optical cable 20 are irradiated in a diffused and converged manner.

The base body 30 is a framework body formed of a groove-shaped member, and has an outer frame part 32 to which a number of condensing lenses 5 are fixed to the outer periphery of the upper part, and an annular prism 10 to which the annular prism 10 is fixed to the upper central part. It has an inner frame part 34 and a lower frame part 36 that protrudes downward and fixes the radiator 15 and the optical cable 20, and has a locking tool 38 on the upper part for hanging the spot illumination device 1 from a ceiling or the like. It is provided.

Note that this invention is not limited to the configuration of the above-described embodiments, and the embodiments can be modified without departing from the technical idea of this invention. For example, a large number of condensing lenses may be A multi-lens unit formed integrally may be used, or a lens unit formed radially such that the optical axes of a large number of condensing lenses are cone-shaped will produce the same effect.

Further, the optical path bending means may be a reflecting mirror formed in an annular shape.

Furthermore, by stacking a plurality of sets of condensing lens groups and optical path bending means one above the other, it is possible to converge a bundle of light rays onto a -polarized radiator and increase the light condensing power.

In addition, the radiator itself may be spherical in addition to the cylindrical shape, and a heat ray filter is disposed just before the radiator.
It may also be possible to prevent the effect of heat rays on the object to be irradiated.

Furthermore, the type and number of irradiation lenses are not particularly limited, and this spot lighting device can be installed and supported by providing feet for stationary use, a pillar-shaped stand, etc. can.

<Effects of the Invention> Since the spot lighting device of the present invention has the above-described configuration, it is possible to use a large number of condensing lenses to condense a luminous flux for general illumination in a store, etc. onto a radiator, and to transmit the light rays. Since it is irradiated intensively by the irradiation means via the optical cable,
A large amount of light can be irradiated locally.

Furthermore, since no power is required for light emission and there is no heating element in the device, it is possible to prevent the temperature of showcases and exhibits from rising.

Further, due to the aesthetic effect of the large number of annularly arranged condensing lenses, a highly decorative spot illumination device can be constructed.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along the arrow E in FIG. 2 of a spot illumination device according to an embodiment of the present invention, and FIG. 2 is a plan view thereof as well. DESCRIPTION OF SYMBOLS 1... Spot illumination device, 5... Condensing lens, 10... Optical path bending means (annular prism), 15...
Radiator, 20... Optical cable, 25... Irradiation means (irradiation lens). Patent application Kinnosuke Hitokomada Figure 1

Claims (1)

[Scope of Claims] A number of condensing lenses whose respective optical axes are arranged in a radial manner to condense external light; a radiator that enters at one end and emits from the other end; and an annular ring that is provided between the plurality of condensing lenses and the radiator and bends the light beams from the plurality of condensing lenses toward the radiator. A spot illumination device comprising: an optical path bending means; an optical cable that receives the light emitted from the radiator and transmits the light beam; and an irradiation means that irradiates the light beam transmitted through the optical cable.