| 摘要 |
PROBLEM TO BE SOLVED: To improve initial startability of an actuating mechanism for changing viscosity or fluidity by imparting a magnetic field to a magnetic fluid. SOLUTION: A magnetic fluid type actuating device, which forces a magnetic fluid 1 having fluidity deteriorated by being magnetized to be sealed inside a casing 2, is equipped with a fine bubble generator 4 for generating fine bubbles in the magnetic fluid 1 inside the casing 2. Even when the magnetic fluid is left in a static state, magnetic particulates are separated from each other by fine bubbles. Deviation in concentration of magnetic particulates can be eliminated or suppressed by being kept in a separated state. By imparting a magnetic field, viscosity or fluidity of the magnetic fluid becomes as desired. As a result, initial startability is improved. COPYRIGHT: (C)2010,JPO&INPIT |
