| 摘要 |
<p>A portable electric tool has an elongated lever (16) pivoted (22) intermediate its length and contained fully within the tool housing (2). The rear end (42) of the lever (16) operates a reversing switch (14), and the forward end (24) of the lever engages in an actuating member (28) slidable along a transverse slot (74) in the lower wall (34) of the motor compartment (6). Intermediate the forward end of the lever (16) and its pivotal axis (22), a downwardly projecting pin (36) coacts with a partition (40) in the upper part of the trigger (12) of a trigger-switch (10) to prevent pivoting of the lever (16) while the trigger (10) is in an inward position energizing the tool. A brush-board assembly (56) is rotatably mounted in bearings (106, 112), and has a stud (66) engaged by an upwardly extending forked arm (68) of the lever (16). With the trigger-switch in the "off" position, the lever (16) is pivoted by the member (28) to simultaneously rotate the brush-board assembly (56) and actuate the reversing switch (14) for the chosen direction of rotation of the motor (44).</p> |
