Abstract: A push rod mechanism includes a lower push rod and an upper push rod relatively stretchable and retractable, and a telescopic control assembly. The lower push rod is provided with a through hole passing through a side wall. The telescopic control assembly includes a limiting member. The limiting member abuts against a side wall of the upper push rod and has a position-limiting state for limiting movement of the upper push rod relative to the lower push rod. The telescopic control assembly includes an operating member capable of pressing against the limiting member, and an operating member for controlling the movement of the operating member. The operating member defines a first position and a second position. In the first position, the operating member keeps the limiting member in the limiting state. In the second position, the operating member allows the limiting member to be released from the position-limiting state.

Abstract: A garden tool includes an upper push rod, a lower push rod and a control mechanism connected to the upper push rod and the lower push rod. The control mechanism includes a safety switch, an expansion-retraction locking assembly and an operation handle, a trigger configured to trigger the safety switch. The expansion-retraction locking assembly includes a limiting member capable of being operated to enter between the upper push rod and the lower push rod to limit an expansion and retraction of the upper push rod relative to the lower push rod, and a stopping member for holding the limiting member in the limiting state. The operating handle is configured to rotate around a pivot shaft between a first position and a second position. The trigger member and the stopping member are connected to the pivot shaft and driven by the operating handle.

Abstract: An electric impact hammer includes an output shaft, a cylinder and a piston arranged in the cylinder. The piston defines an accommodating groove running through the rear end surface and a pair of through holes communicating with the accommodating groove and running through the outer periphery, and the front end of the output shaft is inserted in the accommodating groove, and the output shaft defines a corrugated groove on the outer periphery of the front end and a steel ball partially accommodated in the corrugated groove, the corrugated groove is connected end to end along the outer periphery of the output shaft and has an axial front end and an axial rear end; the other part of the steel ball is accommodated in the through hole, and the output shaft drives the piston to reciprocate in the axial direction by means of the steel balls.