| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid passage opening/closing device which is suitable for flow control of the ink path of an ink jet printer, small light, simple in structure high in operating reliability and not conventionally seen. SOLUTION: This liquid passage opening/closing device is a electromagnetic driving type liquid passage opening/closing device, which is provided with a drive shaft 406 having a high permeability; a spring 407 for urging the drive shaft 406 to one direction; a bobbin case 403 disposing the drive shaft 406 in a cylindrical chamber; a winding wire coil 404 wound on an outer periphery of the bobbin case 403; cases 401, 402 having a high permeability which accommodates the bobbin case 403 on which the winding coil 404 is wound; inlet and outlet joints 411, 409 communicating with a cylindrical chamber of the bobbin case 403 in which the drive shaft 406 is disposed. The joints 411, 409 are opened by driving the drive shaft 406 against an urging force of the spring 407. |
