JP2541632Y2 - Spotlight - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spotlight, and more particularly to a spotlight capable of changing a light emission angle and projecting characters, images, and the like.

[0002]

2. Description of the Related Art A spotlight is attached to a ceiling of a stage, a store or the like, and is generally used to illuminate an object such as a performer or a product. However, conventionally known spotlights have a fixed diameter for emitting light. Therefore, in order to change the range illuminated by the spotlight in accordance with an object, it is necessary to move the spotlight itself. Therefore, there has been a demand for a spotlight that can change the light emission angle, that is, the light distribution angle, without moving the spotlight itself.

[0003]

[Problems to be Solved by the Invention] In order to satisfy such a demand, Japanese Utility Model Application Laid-Open No. 60-32707 (Japanese Utility Model Application No. 58-124) has been proposed.
No. 927) has a spotlight in which a diameter adjusting mechanism is provided between a light-emitting body provided in a rear part thereof and a light-transmitting body provided in a front part thereof in a main body of the spotlight. It has been disclosed.

However, in such prior art spotlights, since the aperture adjusting mechanism is built in the main body container, the structure becomes complicated, and the aperture shape of the aperture by the aperture adjusting mechanism appears as it is on the projection surface. There was a problem that the outline became obstructive in the case of an exhibition. Furthermore,
Spotlights are generally used not only for emitting light but also for coloring light and projecting characters and images.However, the above-mentioned prior art spotlights cannot be applied to such applications. there were.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a spotlight having a simple structure in which the angle of light emission can be easily changed and the contour of the light on the projection surface does not become obstructive. Another object of the present invention is to provide a spotlight having a simple structure capable of coloring light and projecting characters and images.

[0006]

According to the present invention, there is provided a spotlight having a built-in lamp and a condenser lens provided in front of the lamp to emit parallel light. A main body, a light-shielding plate that is replaceably attached to a light emission port of the spotlight main body, and blocks at least a part of the parallel light, and is slidably mounted on a side surface of the spotlight main body in an optical axis direction. ,
There is provided a spotlight comprising: a lens mounting lever extending in an optical axis direction; and a convex lens fixed to the lens mounting lever at a distance from the light shielding plate and collecting the parallel light.

Further, according to the present invention, the light shielding plate comprises a plurality of diaphragm plates having circular openings having different diameters, and the radiation port is blocked by any one of the diaphragm plates. Preferably, the angle can be changed. Further, according to the present invention, it is preferable that the light shielding plate is a mask plate having an opening of an arbitrary shape, so that the arbitrary shape can be projected.

Further, according to the present invention, it is preferable that the shielding plate is a slide plate having an arbitrary image, so that the arbitrary image can be projected.

[0009]

According to the present invention, the light emitted from the lamp is converted into parallel light by the condenser lens. The parallel light passes through the opening of the light-shielding plate and has a parallel shape. The parallel light is enlarged by the convex lens and projected as it is on a wall surface or the like. Therefore, by making the opening of the light-shielding plate an arbitrary shape such as a circle, it is possible to perform illumination in which the contour of light on the projection surface is not obstructive.
Further, by providing a plurality of light-shielding plates having different opening dimensions and appropriately replacing them, the light emission angle can be freely changed.

In the configuration of the present invention, the light shielding plate is configured to be directly attached to the light emission opening of the spotlight body, and the convex lens in front of the light shielding plate is separately provided, so that the structure is simple and the light shielding plate can be replaced. Is easy. Further, by replacing the light-shielding plate with a colored plate, a mask plate, a slide plate, or the like, it is possible to add color to light or project characters or images.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side sectional view of the device according to the present invention. In this figure, reference numeral 10 denotes a spotlight main body, and the spotlight main body 10 incorporates a lamp 12 and condenser lenses 14 and 16 provided in front of the lamp 12 (right in the figure). Condenser lens 1
Reference numerals 4 and 16 denote plano-convex lenses each having one flat surface,
Convex surfaces are combined facing each other to reduce aberrations. The lamp 12 has a light emitting portion 12a
Are arranged so as to coincide with the combined focal point of the condenser lenses 14 and 16. Thus, the light emitted from the lamp 12 becomes parallel light by the condenser lenses 14 and 16. The condenser lenses 14 and 16 are incorporated in the same condenser holder 18 as shown in FIG.

A concave mirror 13 is provided behind the lamp 12 (left side in the figure). The reflecting surface of the concave mirror 13 is a spherical surface centered on the light-emitting portion 12a of the lamp 12, so that light radiated backward from the lamp 12 is
To the light emitting unit 12a. Therefore, it is possible to effectively use the light of the lamp 12 and increase the illumination efficiency.

The front of the condenser lens 16 of the spotlight main body 10, that is, the light emission port 20 is a plane substantially perpendicular to the optical axis. On this surface, two horizontal female screw holes 22 are provided at upper and lower positions. I have. The emission port 20 is the foremost end of the spotlight main body 10. A male screw 24 having a cylindrical head subjected to knurling or the like so as to be easily turned by hand is screwed into the female screw hole 22, and a light shielding plate 28 having an opening 26 at the center is attached by the male screw 24. .

A lens mounting lever 30 extending in the direction of the optical axis 17 is slidably mounted on the side surface of the spotlight body 10 in the direction of the optical axis. This side surface may be the left or right side surface or the upper and lower side surface of the spotlight main body 10. Further, the lens mounting lever 30 is provided with an elongated slot 32.
Through the slot 32 and through the spotlight body 10
Mounting bolt 3 to be screwed into the female screw hole provided on the side surface of
4 fixed. By loosening the mounting bolt 34, the lens mounting lever 30 can be freely moved in the optical axis direction.

A lens holder 42 incorporating a convex lens 40 is fixed to a front end portion of the lens mounting lever 30. The convex lens 40 is fixed at a position spaced from the light shielding plate 28 so as to collect the parallel light. Has become.
The light shielding plate 28 is a diaphragm plate having circular openings having different diameters, and it is preferable that the radiation port 20 be blocked by the diaphragm plate. As a result, the light 1 leaving the lamp becomes parallel light 2 by the condenser lenses 14 and 16,
The parallel light 2 passes through the opening 26 of the light shielding plate 28 and becomes the parallel light 3 having the shape of the opening as it is. The parallel light is expanded by the convex lens 40 and projected as it is on the wall surface or the like. Therefore, by making the opening 26 of the light-shielding plate an arbitrary shape such as a circular shape, it is possible to perform illumination in which the contour of light on the projection surface is not obstructive. Further, by providing a plurality of light-shielding plates 28 having different opening dimensions and appropriately replacing them, the light emission angle can be freely changed. It is preferable that a plurality of the light shielding plates 28 are stacked and attached with only one male screw 24, rotated appropriately around the male screw 24, and used to replace the light shielding plate 28 to be used.

The light-shielding plate may be a mask plate having an opening of an arbitrary shape, for example, a plate having an appropriate PR character portion opened. Thereby, an arbitrary shape can be projected on a wall surface or the like. Further, the light-shielding plate may be a slide plate having an arbitrary image, for example, a slide photograph of a person. Thereby, an arbitrary image can be projected on a wall surface or the like. Further, if a translucent colored plate is attached, light can be colored.

[0017]

As described above, the structure of the present invention is such that the light shielding plate is directly attached to the light emission port of the spotlight body and the convex lens in front of the light shielding plate is separately provided, so that the structure is simple. Therefore, replacement of the light shielding plate is easy. Therefore, according to the present invention, the radiation angle of light can be easily changed, and the contour of light on the projection surface is not obstructive, and the light can be colored and characters and images can be projected. A simple structure spotlight is provided.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Spot light body 12 Lamp 13 Concave mirror 14, 16 Condenser lens 17 Optical axis 20 Emission port 28 Shielding plate 30 Lens mounting lever 40 Convex lens

Continuation of the front page (56) References JP-A 1-142102 (JP, U) JP-A 63-22011 (JP, U) JP-A 60-32707 (JP, U) JP-A 59-134204 (JP) , U) Actually open sho 59-33605 (JP, U)

Claims (4)

(57) [Scope of request for utility model registration] 1. A spotlight body which incorporates a lamp and a condenser lens provided in front of the lamp and emits parallel light, and is interchangeably attached to a light emission port of the spotlight body. A light-shielding plate that blocks at least a part of the parallel light; a lens mounting lever that is slidably mounted on a side surface of the spotlight body in an optical axis direction and extends in the optical axis direction; A spotlight comprising: a convex lens fixed at a position spaced from the light shielding plate and collecting the parallel light. 2. The light-shielding plate includes a plurality of diaphragm plates having circular openings having different diameters, and one of the diaphragm plates is provided.
2. The spotlight according to claim 1, wherein the light emission angle can be changed by blocking the radiation port with one. 3. The spotlight according to claim 1, wherein the light-shielding plate is a mask plate having an opening of an arbitrary shape, whereby the arbitrary shape can be projected. 4. The spotlight according to claim 1, wherein the light-shielding plate is a slide plate having an arbitrary image, so that the arbitrary image can be projected.