Abstract: A rotary mechanism and a handheld tool, which relates to mechanical regulation. The rotary mechanism including a first part, a second part, and a rotary locking assembly, a mounting portion being provided on the first part, the second part having a rotary portion adapted to the mounting portion; the rotary portion and the mounting portion are rotatably sleeving-fitted, the rotary locking assembly includes a sliding block and a rotary drive element, the sliding block is mounted on the rotary portion, and the rotary drive element rotates to bring the sliding block to move radially along the rotary portion so that the sliding block is locked on the mounting portion or is unlocked from the mounting portion.

Abstract: A cleaning disc, including an outer brushing disc, a cavity for accommodating an inner brushing disc being provided on the outer brushing disc, at least two first water outlet passages being distributed at intervals along a circumferential direction at a bottom wall of the cavity, the first water outlet passages extending from an edge towards a center of the bottom of the cavity; a second water outlet passage for cleaning the cavity is provided between every two neighboring first water outlet passages. This design increases flow area of the water flow in the cavity, ensuring that each corner in the cavity can be washed by the spinning water flow. The second water outlet passages as added can ensure sufficient discharge of the waste water after the cleaning work is done, which improves the effect of cleaning the inner space of the brushing discs without dismantling the cleaning disc.

Abstract: A weed burner includes a main body and handle, the main body including base and operating portions, the base portion connects to the handle, the operating portion projecting forwardly from the base portion; the operating portion includes an arcing chamber for letting in a plant and an electrode assembly for discharging high-voltage arcs to the plant, the arcing chamber extending through the operating portion, a bottom end of the arcing chamber being opened and located at an underside of the operating portion; and the electrode assembly includes a positive electrode and a negative electrode, the positive electrode being disposed in the operating portion and tilting downward into the arcing chamber, the negative electrode being disposed at an underside of the operating portion and surrounding an opening of the bottom end of the arcing chamber.