JPH09258676A - Light emitting implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to constitute the shape of graphics, characters, etc., by continuously forming housing recessed parts for housing light emitters and forming recessed curved surface parts for diffusing the light cast from these light emitters on the inside surfaces of these housing recessed parts. SOLUTION: A translucent cover 2 is formed to a U-shape in cross-section formed with a projecting curved surface on its outer peripheral surface and is formed to a shape continuous in a longitudinal direction. The housing recessed parts 2a for housing LED lamps 3 are formed linearly in the longitudinal direction within this cover 2. The LED lamps 3 are arranged apart prescribed intervals in the longitudinal direction of the light emitting implement 1 within the housing recessed parts 2a. The recessed curved surface parts 2b to 2d for diffusing the light cast from the LED lamps 3 to the outer periphery side of the cover 2 are formed on the inside surface of the housing recessed parts 2a. The light emitting implement 1 is continuously formed in the longitudinal direction in such a manner and may be formed to a curvilinear shape, for example, a lopped shape, corrugated shape, etc., and the expression of the forms of the characters, graphics, etc., by combining straight parts and curved parts is possible as well and, therefore, the use similar to neon signs is possible as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device used for a signboard, an electric decoration at a store entrance, an illumination or a sign.

[0002]

2. Description of the Related Art Conventionally, a miniature lamp or a neon tube, which is an incandescent light bulb, is generally used as a light emitting device used for a lighting device for decoration such as illumination, illumination, and signs. This bean lamp or neon tube has poor durability and must be replaced frequently. Also, if a miniature lamp or neon tube is used for a signboard or the like placed at a high place, replacement is troublesome. And these also consume a lot of power.

Therefore, it is conceivable to use a light emitting diode (hereinafter referred to as LED), an optical fiber, or a xenon tube lamp, which has excellent durability and consumes less power.

[0004]

However, since the above-mentioned LED, optical fiber and xenon tube have good directional characteristics of light in only one direction and poor diffusibility, they are widely diffused by decorative lighting such as signboards. It is not suitable when you want to stand out in multiple directions, and if you want to make the light diffusive, then you have to use a large number of closely together, which is expensive and impractical. was there.

Therefore, an object of the present invention is to diffuse light to the surroundings even when using a light-emitting material such as an LED, an optical fiber, and a xenon tube, which has a weak light diffusing property, and can be used for signboards and store entrances. Another object of the present invention is to provide a light emitting device that can be used at a low cost even in a wide area such as a light.

[0006]

As a means for achieving the above object, the invention of claim 1 has a light emitting body, a translucent cover body for covering the light emitting body, and a substrate. It is a light-emitting diode lamp, and the translucent cover body is formed in a shape that is continuous in the longitudinal direction. There is a light emitting device in which a concave curved surface portion for diffusing the light emitted from the light emitting body is formed on the inner surface of the accommodation concave portion. In the above description, the concave curved surface portion includes a concave portion formed of a spherical surface or a quadric surface, and the light incident on the concave curved surface portion is reflected or refracted to diffuse the light.

According to a second aspect of the present invention, in the light emitting device according to the first aspect, the light emitting body is an optical fiber lamp.

According to a third aspect of the present invention, in the light emitting device according to the first aspect, the luminous body is a xenon lamp.

According to a fourth aspect of the present invention, in the light emitting device according to any one of the first to third aspects, at least a part of the concave curved surface portion is provided with a groove portion having an arcuate cross section.

According to a fifth aspect of the present invention, in the light emitting device according to any one of the first to third aspects, at least a part of the concave curved surface portion faces the entire circumference of the translucent cover body in the lateral direction. It is composed of a formed groove having an arcuate cross section and a concave spherical surface formed at a position facing the light emitter.

According to a sixth aspect of the present invention, in the light emitting device according to any one of the first to fourth aspects, the outer peripheral surface of the translucent cover body is formed into a curved surface.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a light emitting device according to an embodiment of the present invention. The light emitting device 1 has a translucent cover 2, an LED lamp 3 and a substrate 4 as main members.
The LED lamp 3 is preferably an ultra-high brightness LED.

For the light-transmitting cover 2, it is preferable to use a light-transmitting member, for example, an integrally molded product of acrylic resin. The translucent cover 2 is formed in a U-shaped cross section having an outer peripheral surface as a convex curved surface, and is formed in a shape continuous in the longitudinal direction. A housing recess 2 a for housing the LED lamp 3 is formed inside the translucent cover 2. This accommodation recess 2a
Is also formed continuously in the longitudinal direction. Translucent cover 2
The end portion in the longitudinal direction may be formed in a separated shape as shown in the figure, but in consideration of hermeticity, a lid portion made of the same material as the translucent cover 2 may be provided at the end portion. Alternatively, it may be formed in a closed shape.

In the accommodating recess 2a, the LED lamps 3 are arranged at predetermined intervals in the longitudinal direction of the light emitting device 1. As shown in FIG. 2, the legs 3 a of the LED lamp 3 are fitted and inserted in the terminals 5, and the terminals 5 are attached to the board 4. Terminal 5
Is connected to a power cord (not shown) via a lead wire (not shown). The translucent cover 2 is fixed to the substrate 4 with an adhesive or the like.

The LED lamp 3 is provided on the inner surface of the accommodation recess 2a.
A concave curved surface portion is formed for diffusing the light emitted from the outer peripheral side of the translucent cover 2. That is, since the light emitted from the LED lamp 3 has a strong directivity to the front side (upward in the figure) of the LED lamp 3 and weak diffusibility, this light is diffused to the peripheral side portion of the translucent cover 2. For this purpose, first, a groove portion 2b having an arc-shaped cross section is continuously provided at a position facing the entire circumference of the translucent cover 2 in the lateral direction. Therefore, a ridge is formed between the grooves 2b. A concave spherical surface portion 2c is formed at a position of the translucent cover 2 that faces the LED lamp 3. These grooves 2b
The concave spherical surface portion 2c diffuses the light emitted from the LED lamp 3 to the front side by the lens effect to the peripheral side portion and the inward side of the housing concave portion 2a.

In this way, the groove portion 2b and the concave spherical surface portion 2c formed in the accommodating concave portion 2a complexly reflect and refract the light from the LED lamp 3 and transmit it through the translucent cover 2 and its peripheral side. When the light emitting device is attached to an electric signboard or the like, the entire light emitting device 1 is illuminated uniformly and brightly so that not only the front side of the light emitting device 1 but also the direction of the peripheral side surface is diffused. It will be clearly visible from.

As described above, since the light emitting device 1 of the present embodiment sufficiently diffuses the light from the LED lamp 3 by means of the spherical or arcuate curved surface formed on the inner surface thereof, the light is diffused on the outer surface thereof. The structure for this does not necessarily have to be provided. Therefore, as shown in the figure, it may be formed in a simple U-shape or may be formed in a decorative shape, so that the degree of freedom in design and the decorative property are high. Further, if the outer surface of the translucent cover 2 is formed into a U-shaped curved surface as shown in the figure, the safety in use is high.

The light emitting device 1 of the present embodiment is formed continuously in the longitudinal direction as shown in the drawing, but its length is set appropriately. As described above, since the light emitting device 1 has a shape continuous in the longitudinal direction, it can illuminate a wide range similarly to a conventional fluorescent tube. Further, the illustrated light emitting device 1 is formed in a linear shape in the longitudinal direction, but it may be formed in a curved shape, for example, a loop shape, a wavy shape, or the like. Since it is possible to represent a figure such as a character or a figure by combining a straight line portion and a curved line portion, it can be used similarly to a neon sign. When the light emitting device 1 is used for an electric signboard or the like, the substrate 4 is fixed to a frame body of the electric signboard or the like with an adhesive, a screw, or the like.

The LED lamp 3 which is the light emitting body in the above embodiment may be replaced with an optical fiber or a xenon lamp. Since these optical fibers or xenon lamps have strong directional characteristics of light in one direction and weak diffusivity, the structure of the translucent cover for diffusing light shown in the above embodiment is effective.

[0020]

According to the first aspect of the present invention, a housing recess for housing an LED lamp is formed inside a translucent cover body, and a plurality of concave curved surfaces for diffusing light are formed on an inner surface of the housing recess. Since at least a part is formed into a curved surface, light can be diffused in the peripheral side surface direction of the translucent cover body by a lens effect, and it can be used for a large area such as a signboard or a store entrance lighting. Since it is a light emitting device and uses an LED lamp, it has high durability, and it is inexpensive because it can be used in a small number. Further, since this light emitting device is formed in a shape that is continuous in the longitudinal direction, it can be formed into a shape such as a figure or a character, and can be used for an inexpensive and highly durable sign.

Since the inventions of claims 2 and 3 use the optical fiber lamp or the xenon lamp as the light emitting body, the same effects as those of the invention of claim 1 can be obtained.

According to the fourth aspect of the present invention, since at least a part of the concave curved surface portion is formed in the groove portion having an arcuate cross section, the light diffusion property is excellent due to the lens effect of the groove portion and the reflection effect of the ridge. Is.

According to a fifth aspect of the present invention, as the concave curved surface portion, a groove portion having an arcuate section is continuously provided so as to face the entire circumference of the translucent cover body, and a concave spherical surface portion is formed at a position facing the LED lamp. Therefore, it is possible to diffuse the light in the entire circumferential direction of the translucent cover body and make the entire light emitting device emit light evenly.

According to the invention of claim 6, the outer surface of the translucent cover body is formed into a curved surface, so that the safety is high.

[Brief description of drawings]

FIG. 1 is a perspective view of a light emitting device.

FIG. 2 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light emitting tool 2 Transparent cover body 2a Housing recessed portion 2b Concave curved surface portion (circular cross-section groove portion) 2c Concave curved surface portion (concave spherical surface portion) 2d Concave curved surface portion (circular cross-section groove portion) 3 Light emitting diode lamp 4 Substrate

Claims (6)

[Claims] 1. A light-emitting body, a light-transmitting cover body that covers the light-emitting body, and a substrate, the light-emitting body is a light-emitting diode lamp, and the light-transmitting cover body is continuous in a longitudinal direction. The translucent cover body is formed into a shape, and an accommodating recess for accommodating the luminous body is formed continuously in the longitudinal direction inside the translucent cover body. A light-emitting device characterized in that a concave curved surface portion for diffusing irradiated light is formed. 2. The light emitting device according to claim 1, wherein the light emitting body is an optical fiber lamp. 3. The light emitting device according to claim 1, wherein the light emitting body is a xenon lamp. 4. The light emitting device according to claim 1, wherein at least a part of the concave curved surface portion is continuously provided with a groove portion having an arcuate cross section. 5. The arc-shaped cross section according to claim 1, wherein at least a part of the concave curved surface portion is formed to face the entire circumference of the translucent cover body in the lateral direction. And a concave spherical surface portion formed at a position facing the light emitting body. 6. The light emitting device according to claim 1, wherein the outer peripheral surface of the translucent cover body is formed into a curved surface.