Trigger switch
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United States of America Patent
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Mar 31, 2009
Issued Date -
N/A
app pub date -
Feb 8, 2006
filing date -
Feb 9, 2005
priority date (Note) -
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Abstract
To provide a trigger switch having a simple structure that is capable of reducing bouncing when the contacts are switched ON/OFF, the trigger switch includes a switch mechanism integrated in a single assembly a power control unit that turns a plurality of switches provided on the switch mechanism ON/OFF depending on a degree of retraction of the control unit by moving a pressing member over a top of a seesaw-shaped switching bar, a motor brake and control element short-circuit unit that drives a movable armature having two short-circuit contacts and is sandwiched and held between two springs, and a speed control unit that slides a plurality of moving contacts disposed in parallel over sliding contacts disposed on a sliding circuit substrate so as to control both the supply of power and a control element, and thus control the rotation speed of a motor.
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