| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the occurrence of mechanical noise at the time of exciting a sound producer and to improve the durability. <P>SOLUTION: A mobile body 20 is constituted by connecting a plunger 21 and a magnet 23, and a lead 2 is made of a magnetic body and always receives a magnetic attraction from the magnet 23 and has a front end part 2b brought into contact with the magnet 23 in an initial state. When a driving current is supplied to a solenoid coil 11, the mobile body 20 is moved upward, and the front end part 2b of the lead 2 follows the magnet 23 up to a certain degree and the lead is bent upward with the front end part 2a as a support point. When the mobile body 20 is moved upward furthermore, a restoring force by elasticity of the lead 2 overcomes the attraction of the magnet 23 and is separated from the magnet against the attraction. Then, the front end part 2b of the lead 2 is freely oscillated by an elastic energy stored due to bending, and the lead 2 produces sounds at a peculiar pitch. <P>COPYRIGHT: (C)2004,JPO |
