| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power tool in which electronic circuit boards are miniaturized and the reliability of signal lines connecting a plurality of the electronic circuit boards is improved. <P>SOLUTION: The power tool includes a motor for driving a tip tool via a power connection mechanism, the plurality of circuit boards 9 and 10 that load circuits for controlling the motor rotation, and a housing for storing them. The circuit boards 9 and 10 are connected through a flexible printed board having a plurality of signal lines, and connectors 130 and 140 which connect the circuit boards 9, 10, and the flexible printed board. A plurality of connector contacts 143-1 through 3 and 143-22 through 24 are allocated to signal lines 101a and 124a among the plurality of the signal lines. Thus, a plurality of connector contacts are provided to a single control signal so that a contact failure caused by attaching/detaching of an outer edge part of the extremely compact connector 140 can be prevented. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
