| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to constitute a vibration generator to a small size at a low cost by making it possible to obtain large vibration with small energy and simplifying the constitution of not only the mechanism section but the driving circuit itself as well. SOLUTION: A driving coil 26 and detecting coil 27 which are concentrically disposed are partly advanced without contact into a magnetic gap 59 of an inertia section 50 supported by an elastic supplying section 40. The driving circuit 30 is composed of a first resistor 33 connected between one of a power source 37 and one end of the detecting coil 27, a second resistor 34 connected between one end of the detecting coil 27 and the other of the power source 37 and a transistor(TR) 35 connected at its base to the other end of the detecting coil 27 and connected at its collector to the other end of the driving coil and is connected at its emitter to the other of the power source. The current flowing from the connection point of the first and second resistors 33, 34 to the base of the TR 35 via the detecting coil 27 is intermittently shut off by the electromotive force generated at both ends of the detecting coil 27 according to the movement of the inertia section 50, by which the vibration of the inertia section 50 is maintained. |
