Patent ID: 7156541
Filing Date: 2007-01-02
Classification: F21S,F21V

Abstract:
1. A projector desk lamp comprising: a base for supporting the desk lamp; a stem with one end connected to form an adjustable joint with said base so that the stem can be freely swung between a horizontal position and an articulable vertical position and can be locked in a plurality of positions in between; a lock knob mechanism used for quickly releasing and locking said stem with said base, said stem and base connected by a hinge, said lock knob mechanism comprising a spring biasing a pair of gears into engagement for locking the position of said stem with said base about said hinge and biasing apart a pair of pins and corresponding knobs, said knobs being depressable to release the position of said stem with said base; a bracket formed on the other end of said stem; a lamp head which is connected to form an articulable joint adjustable by said bracket so that said head can be swung more than 180 degrees and can be locked in a plurality of positions in between; and said lamp head comprising a bulb, a reflector, an adjustable lens assembly comprised of at least a set of convex lens and concave lens and a focus ring and a slide.