Patent ID: 6822774
Filing Date: 2004-11-23
Classification: G02B,G06K

Abstract:
An optoelectronic device for detecting labels with contrast patterns, said device comprising:a transmitter that emits light rays, said transmitted light rays scanning the contrast patterns of the labels; a receiver that receives light rays reflected by the labels and generates electrical receiving signals corresponding to the received light rays; an evaluation device for evaluating the electrical receiving signals at the receiver; and a deflection unit including a polygonal mirror wheel, and a motor that drives the polygonal mirror wheel, said transmitted light rays being guided over said polygonal mirror wheel to scan the contrast patterns of the labels and said received light rays being guided over said polygonal mirror wheel, wherein said motor has a shaft, an injected-molded magnet that is molded on said shaft and a coil, said coil being spaced from said magnet and said magnet operating jointly with said coil; a printed circuit board wherein said motor rests on said printed circuit board and said evaluation device is integrated into the printed circuit board and wherein said shaft rotates inside a bearing, said shaft being connected to said printed circuit board via said bearing; and a tube that projects from the top of said printed circuit board wherein said bearing is positioned inside said tube, wherein said shaft has an upper portion and a lower portion, said bearing is provided with a bearing bore that extends in an axial direction, and the lower portion of said shaft is inserted in the bearing bore.