| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress wasteful power consumption without increasing the number of components. <P>SOLUTION: This trigger switch circuit 11 operating in conjunction with a trigger of an electric instrument includes a main switch SW1, a sliding switch SW4, a light-emission control unit 32, and a rotation control unit 31. When the trigger is at an initial position, the main switch SW1 is turned off and the sliding switch SW4 is not connected to any fixed contact point. When the trigger reaches a first position, the sliding switch SW4 is connected to a fixed contact point A1 and power is fed to the light-emission control unit 32 without interposing the main switch SW1 to emit light in an LED. When the trigger reaches a second position, the main switch SW1 is turned on to feed the power into the trigger switch circuit 11. When the trigger reaches a third position, in the sliding switch SW4, connection is switched from the fixed contact point A1 to a fixed contact point A2 to operate the rotation control unit 31 to drive a motor M. <P>COPYRIGHT: (C)2013,JPO&INPIT |
