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电动工具的安全机构及包含该机构的电动工具
Safety mechanism for power tool and power tool incorporating such mechanism
US-7407015-B2用于绿篱机，防止意外启动。
专利摘要
公开了一种用于树篱修剪机的安全机构。拇指扣1032、1048与相应的锁定构件最初相对于对应的致动杆1010、1014向下偏置，结果防止树篱修剪机的电机致动。这防止了树篱修剪机的无意单手致动。为了致动树篱修剪机，用户握住致动杆1010、1014之一，将对应的拇指扣1032或1048向上，这导致另一个拇指扣朝向其释放位置移动，以允许致动杆1010、1014相对于树篱修剪机的手柄枢转移动。致动杆1010、1014之一相对于手柄的移动使杆1018与电气开关组件1008接合以致动树篱修剪机的电机。当释放致动杆1010、1014时，扭转弹簧将致动杆1010、1014和锁定构件相对于手柄壳体1004向外推，结果锁定构件被推入锁定位置以防止进一步致动致动杆1010、1014，直到拇指扣1032、1048再次滑出它们的锁定位置。
Original abstractA safety mechanism for a hedge trimmer is disclosed. Thumb catches 1032, 1048 , together with corresponding locking members are initially biased downwardly relative to corresponding actuator levers 1010, 1014 , 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 levers 1010, 1014 the corresponding thumb catch 1032 or 1048 upwardly, which causes movement of the other thumb catch towards its release position to allow pivotable movement of the actuator levers 1010, 1014 relative to a handle of the hedge trimmer. Movement of one of the actuator levers 1010, 1014 relative to the handle brings the lever 1018 into engagement with the electrical switch assembly 1008 to actuate the motor of the hedge trimmer. When the actuator levers 1010, 1014 are released, torsion springs urge the actuator levers 1010, 1014 and locking members outwardly relative to the handle housing 1004 , as a result of which the locking members are urged into a locking position to prevent further actuation of actuator levers 1010, 1014 until the thumb catches 1032, 1048 have again been slid out of their locking position.
专利附图（8）
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