Chervon (Hk) Limited

Nanjing Chervon Industry Co., Ltd.

Fengqin Zhou

Wu Chen

Gan Wei

Xiangqing Fu

A hand-held power tool includes a housing defining a first longitudinal axis and an illuminating assembly mounted to the housing. The illuminating assembly includes lighting elements distributed on the housing around the first longitudinal axis, a circuit board electrically connected to the lighting elements, a main body, and a fixing member. The lighting elements are supported by the circuit board. The main body partially covers the lighting elements and the circuit board. The lighting elements and the main body are fixed to the housing by the main body cooperative with the fixing member. The lighting elements are distributed around the first longitudinal axis so that light of the lighting elements can be emitted from multiple different angles, shadows are avoided in corresponding zones, and therefore the lighting elements can be called shadow-less lighting elements.

Hand-held power tool with lighting element

A battery pack has a battery, a sensor module, a first power supply module and an indicating module. The sensor module is used to detect a change in an electrical field or magnetic field nearby the battery pack and to activate the indicating module in response to the change being detected.

Battery pack and method of indicating remaining capacity thereof

An electric power tool includes a motor, a power supply circuit for supplying power to the motor, and a control device which is able to measure current of the motor and control duty cycle of the power supply circuit. When the measured current of the motor is greater than a predetermined current value, the duty cycle of the power supply circuit is increased to a first predetermined value. If the current of the motor is still greater than the predetermined current value, the duty cycle of the power supply circuit is decreased to a second predetermined value such that the current of the motor is equal to or less than the predetermined current value.

Growing community of inventors

Nanjing, China

Fengqin Zhou