Hangzhou Zero Zero Technology Co., Ltd.

Hao's Fitness Equipment (Shanghai) Co., Ltd. Trading Ltd.

Liqiang Guo

A dumbbell handle, a dumbbell and a dumbbell base, wherein the dumbbell handle comprises: a handle body; a gear rotation assembly, wherein a planetary gear mechanism is sleeved on one end of a gear shaft, another end of the gear shaft is nested in a first cavity, and an inner wall of each of two ends of a second cavity of the gear shaft is provided with a first protruding block; a telescopic shaft, wherein a thread groove that matches the first protruding block is provided in a side wall of the telescopic shaft; and a cam mechanism, wherein a driving wheel engages with a driven wheel, an elastic member is arranged on the side of the driven wheel away from the driving wheel, the driving wheel is sleeved on an end portion of the gear shaft, and the driving wheel is driven by the gear shaft to rotate.

Dumbbell handle, dumbbell and dumbbell base

An unmanned aerial vehicle includes a fuselage body and a lift mechanism. The lift mechanism includes a rotor blade assembly and a rotary driving member and defines an axis of rotation. The lift being mechanism is coupled to the fuselage body. The rotary driving member is configured to controllably rotate the rotor blade assembly about the axis of rotation. The rotor blade assembly includes at least one rotor blade. The at least one rotor blade including a vortex generator defined along an upper surface of the rotor blade.

Growing community of inventors

Zhejiang, China

Liqiang Guo