JPH09147089A - Flood angle-variable type illuminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminator with which the flood angle can be arbitrarily set corresponding to an object. SOLUTION: A petal part 4 is formed by cutting the peripheral edge of a circular substrate 2 having flexibility toward the inside, a light source 1 such as LED is mounted at the petal part 4, and the substrate 2 is fitted to an inside ring frame 5 whose diameter is smaller than that of the substrate. Further, an outside ring frame 6 having almost the same diameter as that of the circular substrate is mounted coaxially with the inside ring frame 5 so as to be freely paid out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device, and more particularly to a lighting device for illuminating an illumination target from its surroundings by using an illumination light source having directivity, for example, for inspection / position recognition in a production line. It is suitable for imaging applications.

[0002]

2. Description of the Related Art In a conventional ring-shaped illumination device, a light source is fixed to an illumination device body 10 as shown in FIG. 4, and the illumination device body is changed each time the illumination condition is changed according to an object. This was done by changing the fixed position of 10. Further, even if this does not provide the optimum illumination conditions, and if a unique projection angle 11 is required, by making the mounting angle of the light source and its conductor in the lighting device main body 10 according to the angle. It was done.

[0003]

SUMMARY OF THE INVENTION In the above conventional configuration,
Even if an illumination condition according to the object can be realized by changing the fixed position of the illuminating device main body 10, there is a problem that the projection angle cannot be set to an optimum angle according to the object. It was The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an illuminating device that can easily set a projection angle to an optimum arbitrary angle according to an object.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a petal-like structure in which a circular substrate having flexibility is provided with a notch toward the inside to form a petal-like portion, and the petal-like portion is provided with a dot such as an LED. While mounting the light source, the substrate is attached to an inner ring frame having a diameter smaller than that of the substrate, and an outer ring frame having a diameter substantially equal to that of the circular substrate is coaxially attached to the inner ring frame so that the outer ring frame can be attached. By unwinding, the angle of the substrate can be set arbitrarily.

Further, circular illumination devices having different inner and outer diameters are coaxially nested and arranged in multiple stages, and each illumination device has a light source set to a different light emitting angle, and a plurality of light emitting angles can be switched at high speed. Alternatively, it is possible to illuminate with a plurality of projection angles.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention has a petal-like structure in which a disc substrate having flexibility is provided with a notch toward the inside to form a petal-like shape, and the petal-like portion has a light source such as an LED. Is mounted, the substrate is attached to an inner ring frame having a diameter smaller than that of the substrate, and further, an outer ring frame having a diameter substantially equal to that of the circular substrate is coaxially attached to the inner ring frame and is mounted so as to be able to be extended. It is a variable angle lighting device, and the invention according to claim 2 is characterized in that, in the lighting device according to claim 1, the cross-sectional shape of the tip of the outer ring frame is curved. Also, by extending the outer ring frame, the petal-shaped portion provided on the peripheral edge of the substrate is pushed out by a certain amount, and the light projecting angle of the light source can be arbitrarily set.

Further, the invention according to claim 3 is characterized in that circular lighting devices having different inner and outer diameters are coaxially nested in a multi-stage arrangement, and the respective lighting devices set light sources at different projection angles. In the lighting device according to claim 4, the lighting device according to claim 3 is characterized in that each lighting device can be independently controlled for lighting. By providing different illuminating angles to each illuminating device, a plurality of illuminating angles can be switched at high speed, or illumination can be performed by a plurality of illuminating angles at the same time.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a side view showing a first embodiment of the present invention, and FIG. 2 is a plan view showing a state in which a point light source is attached to a substrate. In the figure, 1 is a point light source such as an LED, which is mounted in a ring shape along the outer peripheral edge of a flexible circular substrate 2. The circular substrate 2 is provided with a slit 3 from its outer peripheral edge toward the center, and a petal portion 4 is formed on the outer peripheral edge of the circular substrate 2 by the slit 3 so that the point light source 1 has a petal portion 4 of the circular substrate 2. Implemented in. 5
Is an inner ring frame, and the outer diameter of the inner ring frame 5 is smaller than the radius of the ring-shaped portion where the point light source is mounted in a ring shape on the substrate.

The circular substrate 2 is attached to the inner ring frame 5 with the petal portions 4 protruding from the outer peripheral edge of the inner ring frame 5. The outer ring frame 6 has an inner diameter slightly larger than the outer diameter of the inner ring frame, and its outer diameter is substantially the same as the outer diameter of the circular substrate 2 on which the point light source is mounted.

The cross-sectional shape of the tip of the outer ring frame 6 is curved. The outer ring frame 6 is arranged coaxially with the inner ring frame 5, and the outer ring frame 6 is provided so as to be able to be extended with respect to the inner ring frame 5 so as to be vertically movable. As a means for attaching the outer ring frame 6 to the inner ring frame 5, various means capable of vertically moving the outer ring frame 6 can be adopted. When the outer ring frame 6 is extended to the inner ring frame 5 and the tip portion thereof is projected downward as shown in FIG. 1, the tip portion of the outer ring frame 6 has a petal portion 4 of the circular substrate 2.
Is pushed downward, and as shown in FIG. 1, the petal portion 4 is bent inward at a constant angle. Outer ring frame 6
Since the tip end portion of the outer ring frame 6 has a curved shape when the substrate is extended downward, the bending angle of the substrate does not change abruptly with respect to the amount of the outer ring frame 6 delivered. Thus, by extending the outer ring frame downward, the petals 4 of the circular substrate 2
It is possible to easily change the projection angle of the point light source 1 provided in the. (Embodiment 2) FIG. 3 is a schematic view showing another embodiment of the present invention.

In the figure, reference numerals 7, 8 and 9 denote illumination devices in which point light sources are mounted in a ring shape, and the point light sources of each illumination device are set to different projection angles. The illumination devices 7, 8 and 9 are combined in a nested manner as shown in the figure, and are configured to be capable of independent lighting control. In this way, lighting devices having different inner and outer diameters are coaxially arranged in multiple stages as a nested structure, and different lighting angles are given to the respective lighting devices, so that a plurality of lighting angles can be switched at high speed, or At the same time, it becomes possible to illuminate with a plurality of projection angles.

[0012]

As described above, according to the first aspect of the present invention,
According to the inventions described in (2) and (2), the substrate on which the point light source is mounted can be pushed out by a certain amount by feeding out the frame on the outside of the lighting device, and the angle can be arbitrarily fixed. Can be set.

According to the third and fourth aspects of the present invention, the illuminating devices having different inner and outer diameters are coaxially arranged in multiple stages as a nested structure to provide different set projection angles. It is possible to switch a plurality of light projecting angles at high speed or to illuminate at the same time by a plurality of light projecting angles.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a lighting device of a first embodiment of the present invention.

FIG. 2 is a plan view of a substrate on which a point light source is mounted.

FIG. 3 is a schematic view showing a lighting device of a second embodiment of the present invention.

FIG. 4 is a schematic view of a conventional ring-shaped lighting device.

[Explanation of symbols]

 1 point light source 2 substrate 3 slit 4 petal part 5 inner ring frame 6 outer ring frame 7-9 lighting device

Claims (4)

[Claims] 1. An inner ring frame having a diameter smaller than that of the substrate, in which a flexible circular substrate is provided with a notch toward the inside to form a petal shape, and a light source such as an LED is mounted on the petal-shaped portion. And a variable projection angle type illumination device in which an outer ring frame having a diameter substantially equal to that of the circular substrate is mounted so as to be coaxial with the inner ring frame. 2. The variable projection angle illuminating device according to claim 1, wherein the tip portion of the outer ring frame has a curved sectional shape. 3. A variable projection angle type illuminator, wherein circular illuminators having different inside and outside diameters are coaxially arranged in a multi-tiered structure, and the respective illuminators have their light sources set at different projection angles. . 4. The variable projection angle illuminating device according to claim 3, wherein each illuminating device can control lighting independently.