초록 ▼

The present invention relates to a light stick comprising an electric light source and a light-refracting tubular body. The light-refracting tubular body has a longitudinal axis and is made of a translucent or transparent plastic material. The tubular body tapers from a first open end of larger diam

The present invention relates to a light stick comprising an electric light source and a light-refracting tubular body. The light-refracting tubular body has a longitudinal axis and is made of a translucent or transparent plastic material. The tubular body tapers from a first open end of larger diameter to a second closed end of smaller diameter. The light source is mounted in the open end of the tubular body with the power source housed in an adjoining cap which may be fitted onto the open end. The light source includes a LED aligned with the longitudinal axis of the tubular body, and a light-refracting network is formed on the internal surface of the body to project light emitted by the LED towards the side and the closed end of the tubular body. This network consists of a generally helicoidal thread. In operation, the light rays are refracted and radiated by the thread and the translucent or transparent plastic material forming the tubular body appears to glow evenly along its entire length. This threaded and tapered surface is particularly relevant and interesting since it allows easy disengagement of the tubular body from the plastic injection mold and works efficiently with many different electrical light sources. Optionally, the external surface of the tubular body includes a plurality of longitudinal projections, triangular or arced in cross section, to improve uniform light distribution along the tubular body.

대표청구항 ▼

[ What is claimed is:] [1.] A lens member comprising a one-piece elongated tubular body made of light-propagating molded plastic material, the tubular body comprising an internal tapered surface formed with a generally helical thread, wherein the helical thread defines a light-refracting network for

[ What is claimed is:] [1.] A lens member comprising a one-piece elongated tubular body made of light-propagating molded plastic material, the tubular body comprising an internal tapered surface formed with a generally helical thread, wherein the helical thread defines a light-refracting network for refracting and radiating light generally uniformly along the tubular body.