| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive vibration generator good in vibration efficiency. SOLUTION: When a switch 5 is turned on by a call signal, an electric current is allowed to flow in a coil 4 by the power of a battery 1, and a magnetic field is generated in the coil 4. Since an electromagnetic force is generated at right angles to the magnetic field, the battery is moved to break contact with a spring 2, hence the electromagnetic force is nullified, and the battery 1 is returned to the original position. The action is repeated to generate vibration.
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