Safety mechanism for power tool and power tool incorporating such mechanism

Abstract

A safety mechanism for a hedge trimmer is disclosed. Thumb catches, together with corresponding locking members are initially biased downwardly relative to corresponding actuator levers, as a result of which actuation of a motor of the hedge trimmer is prevented. This prevents inadvertent one-handed actuation of the hedge trimmer. In order to actuate the hedge trimmer, the user holds one of the actuator leversthe corresponding thumb catchorupwardly, which causes movement of the other thumb catch towards its release position to allow pivotable movement of the actuator leversrelative to a handle of the hedge trimmer. Movement of one of the actuator leversrelative to the handle brings the leverinto engagement with the electrical switch assemblyto actuate the motor of the hedge trimmer. When the actuator leversare released, torsion springs urge the actuator leversand locking members outwardly relative to the handle housing, as a result of which the locking members are urged into a locking position to prevent further actuation of actuator leversuntil the thumb catcheshave again been slid out of their locking position.