Printed-circuit board and trigger-switch arrangement for a portable electric tool

A portable electric tool comprising:

• an electric motor capable of drivingly rotating in either of two rotational directions and having an armature and stator;
• a housing having a handle and a motor compartment, said motor being contained in said motor compartment;
• a first switch in said handle for energizing said tool and being actuated by a trigger movable in a first direction inwardly and outwardly of said handle;
• a printed circuit board situated in said motor compartment and having a central aperture therein and being mounted on said stator with a portion of said armature disposed through said aperture;
• a second switch mounted on said printed circuit board for determining the rotational direction of drive of said motor, and having a first actuating member which extends from said second switch for operation thereof, and a second actuating member at least part of which is exterior of said motor compartment, said second actuating member being operatively connected to said first actuating member and being movable transversely to said first direction for determining the rotational direction of said motor;
• said trigger and said second actuating member being mechanically interrelated whereby said trigger remains inoperative until said second actuating member is positioned to allow said motor to be energised to drivingly rotate in either one or other of said rotational directions.

A portable electric tool, comprising:

• a housing having a motor compartment;
• a main switch for energizing the tool;
• an electric motor module mounted in the motor compartment and including a printed circuit board assembly which incorporates a reversing switch for determining the rotational direction of drive of the motor module;
• means interrelating the reversing switch and the main switch for rendering the main switch inoperative until the reversing switch is positioned to allow the motor module to be energized to drive in either one or other rotational direction;
• said reversing switch having an actuating part extending therefrom;
• a pivoted member operatively connected to said actuating part and interrelated with the main switch;
• and
• means accessible from the exterior of said housing for pivoting the pivoted member to operate the reversing switch.

A portable electric tool, comprising:

• an electric motor capable of drivingly rotating in either of two rotational directions and having an armature with a commutator and a stator;
• a housing having a handle and a motor compartment, said motor being contained in said motor compartment;
• a first switch in said handle for energizing said tool;
• a printed circuit board situated in said motor compartment and having a central aperture therein with a portion of said armature disposed through said aperture;
• a pair of brushes mounted on said printed circuit board and being in electrical contact with said commutator;
• and
• a second switch mounted on said printed circuit board for determining the rotational direction of drive of said motor, and having a first actuating member which extends from said second switch for operation thereof, said second switch being disposed between said printed circuit board and said stator and having a first pin slidably engaged in said stator for supporting said circuit board;
• said first and second switches being mechanically interrelated whereby said first switch remains inoperative until said second switch is positioned to allow said motor to be energized to drivingly rotating in either one or other of said rotational directions.

A portable electric tool, comprising:

• an electric motor having an armature and a stator and being capable of drivingly rotating in either of two rotational directions, said stator having two passageways therein;
• a motor compartment containing said motor;
• a printed circuit board assembly contained in said motor compartment and comprising a printed circuit board having a central aperture therein, two brushes engaging said armature, four stator field coil terminals electrically and mechanically plugged into said stator, a motor reversing switch, and two securing pins, a portion of said armature being disposed through said aperture, and said securing pins slidably engaging in said passageways to releasably support said assembly on said stator in conjunction with said four field coil terminals;
• and
• a main switch for energizing said tool;
• said reversing switch and said main switch being interrelated whereby said main switch remains inoperative until said reversing switch is positioned to allow said motor to be energized to rotate in either one or other of said rotational directions.

A portable electric tool, comprising:

• a housing having a motor compartment;
• a main switch for energizing the tool;
• an electric motor module mounted in the motor compartment and including a printed circuit board assembly which incorporates a reversing switch for determining the rotational direction of drive of the motor module;
• means interrelating the reversing switch and the main switch for rendering the main switch inoperative until the reversing switch is positioned to allow the motor module to be energized to drive in either one or other rotational direction;
• the electric motor module including an armature having a commutator, and a laminated stator stack having at least one passageway therein and two field coils;
• and
• the printed circuit board assembly including two brush holders containing brushes engaging the commutator, field coil plug terminals releasably connected to the field coils, and at least one securing pin releasably engaged in said passageway.

A portable electric tool, comprising:

• a housing having a motor compartment;
• a main switch for energizing the tool;
• an electric motor module mounted in the motor compartment and including a printed circuit board assembly which incorporates a reversing switch for determining the rotational direction of drive of the motor module;
• means interrelating the reversing switch and the main switch for rendering the main switch inoperative until the reversing switch is positioned to allow the motor module to be energized to drive in either one or other rotational direction;
• and
• sad electric motor module including a stator, and said printed circuit board assembly having two housing-like structures which releasably support the assembly on an end of the stator while holding the assembly in spaced relation thereto, said reversing switch being housed in one of the housing-like structures.