| 摘要 |
PURPOSE:To certainly stimulate the skin by covering the irregularities in the contact state of a touch projection and the skin of an arm by alternately driving an electromagnetic converter by connecting a drive coil between the output terminals of two inverters constituting a drive circuit. CONSTITUTION:A drive circuit 101 is constituted of inverters 102, 103 and an electromagnetic type converter 302 can be alternately driven by connecting a drive coil 305 between the output terminals O1, O2 of the inverters. The tip of a touch projection 309 is in the contact state with the skin of an arm in such a state that no alternating current is supplied. When an alternating current is supplied to the drive coil 305 in this state by the arrival of alarm time, at first, the touch projection 309 is vibrated in a retracted direction by a negative current and, therefore, the tip thereof is separated from the skin of the arm and, next, the touch projection 309 is vibrated in a pushed-out direction by a positive current and, therefore, the tip thereof stimulates the skin of the arm so as to to strike the same. |
