Power tool and control module therefor

A control module for a power tool, including:

• a box-shaped case, one side of which is open;
• a circuit board housed in the case;
• a microcomputer and field effect transistors (FETs), which are mounted on the circuit board and are configured to control a brushless motor of the power tool;
• a manipulatable member, which is movable relative to the case;
• one or more movable switches electrically connected to the circuit board and mechanically linked to movement of the manipulatable member;
• a cover, which partially overlays the case opening so as to cover a portion of the circuit board and so as to cover the movable switch(es);
• and
• bonded parts that form an enclosed space, which encloses the movable switch(es), by welding or otherwise materially bonding the cover to the case;
• wherein:
• the case has a case bottom wall and case peripheral walls extending perpendicular from peripheral edges of the case bottom wall;
• the cover has a cover bottom wall and cover peripheral walls extending perpendicular from peripheral edges of the cover bottom wall;
• the bonded parts weld or otherwise materially bond, to each other, case facing-surfaces of the case peripheral wall and cover facing-surfaces of the cover peripheral wall, which face each other in their directions of extension;
• the cover has guide pieces, which extend toward the case beyond the cover facing-surfaces of the cover peripheral walls and extend so as to pass between the case peripheral walls and side surfaces of the circuit board, the guide pieces fitting between the circuit board and the case peripheral walls;
• and
• the bonded parts weld or otherwise materially bond extending ends of the guide pieces to the case.