Patent ID: 6439705
Filing Date: 2002-08-27
Classification: B41J

Abstract:
An electromagnetic driven liquid flow path opening/closing device, for opening and closing a liquid flow path, comprising:a highly permeable drive shaft; urging force exertion means for impelling said drive shaft in one direction; a bobbin case within which said drive shaft inside a cylindrical chamber is positioned; a coil wound around the outer face of said bobbin case; a pair of highly permeable cases in which said bobbin case around which said coil is wound and is stored; and a liquid flow path, communicating with said cylindrical chamber of said bobbin case wherein said drive shaft is positioned, wherein said liquid flow path is opened by impelling said drive shaft to counter the urging force exerted by said urging force means; wherein a portion that is located opposite the direction in which said drive shaft is impelled by said urging force exertion means, and that contacts said drive shaft, is mounted inside said coil, in order to stabilize the shaft driving direction.