| 摘要 |
There is disclosed a liquid supply apparatus which is disposed in an ink outlet of a flexible ink storage bag, having no pressure for supplying an ink, or disposed midway in an ink supply path, for supplying the ink to an ink jet head, and which is small in size, little in power consumption and simple in mechanism. A liquid pressurizing supply apparatus is driven in response to an alternating or pulse electric signal, and comprises a high-permeability driving shaft, a spring for urging the driving shaft in one direction, a bobbin case in which the driving shaft is disposed in a cylindrical chamber, a winding coil wound around an outer peripheral surface of the bobbin case, a pair of high-permeability case members in which the bobbin case with the winding coil wound therearound is contained, and a containing recess portion is formed by a sheet metal drawing process, inlet and outlet joints connected to the cylindrical chamber of the bobbin case, and a ball check valve for preventing ink back-flow.
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