| 摘要 |
<p>PROBLEM TO BE SOLVED: To miniaturize a device without increasing the power consumption. SOLUTION: When a plunger 30 of an electromagnetic solenoid 28a is thrust up, an extended part 26 of a key 3 is thrust up by a force stronger than the force by which the plunger 30 is thrust up because a thrusting-up member 38 uses the principle of levers to thrust up the extended part 26 of the corresponding key 3. Consequently, the extended part 26 is made shorter with use of the electromagnetic solenoid 28a of the same power consumption, and the device is miniaturized without increasing the power consumption.</p> |
