Nail polisher with UV lamp

A nail grinder with a UV lamp assembly, comprising:

• a shell;
• a nail grinding assembly;
• a motor;
• the UV lamp assembly;
• a PCB board;
• a power supply assembly;
• wherein the shell is provided with an accommodation cavity, and both ends of the shell are respectively provided with a first through hole and a second through hole communicating with the accommodation cavity;
• the nail grinding assembly comprises a transmission mechanism installed in the accommodation cavity, and a polishing head that penetrates the first through hole and is detachably connected to the output end of the transmission mechanism;
• the motor is installed in the accommodation cavity, the output end of the motor is connected to the transmission mechanism, and the motor is used to drive the transmission mechanism to rotate;
• the UV lamp assembly is provided in the accommodation cavity and close to the second through hole for curing nail polish;
• the PCB board is arranged in the accommodation cavity and is electrically connected to the motor;
• the power supply assembly is disposed on a side of the PCB board for supplying energy to the motor, the UV lamp assembly, and the PCB board that are disposed inside the shell;
• wherein the transmission mechanism comprises a main shaft, wherein an outside of the main shaft is engaged with an inner wall of the shell;
• wherein the main shaft has a cavity, and wherein a rotating shaft body is installed in the cavity in the main shaft;
• wherein the rotating shaft body comprises a first rotating shaft, a second rotating shaft, and a third rotating shaft, wherein one end of the first rotating shaft is fixedly connected to an output end of the motor, the output end of the motor being an output shaft of the motor, and wherein another end of the first rotating shaft defines a first jack recessed towards an inside of the first rotating shaft;
• wherein one end of the second rotating shaft is inserted into and fixedly fitted with the first jack, and another end of the second rotating shaft defines a second jack recessed towards an inside of the second rotating shaft;
• wherein one end of the third rotating shaft is inserted into and fixedly fitted with the second jack, and wherein another end of the third rotating shaft penetrates the cavity and is disposed on a top of the main shaft, wherein a plurality of collars is sleeved on an outside of the third rotating shaft located in the cavity, and wherein outer portions of the plurality of collars are engaged with an inner wall surface of the main shaft;
• wherein the first rotating shaft, the second rotating shaft, and the third rotating shaft are each have a substantially linear shape, and are substantially collinearly and coaxially arranged on a straight line;
• wherein the motor is operative to drive motor output end to rotate and further drive the rotating shaft body to rotate, wherein the first rotating shaft, the second rotating shaft, and the third rotating shaft are operative to be driven to rotate;
• wherein there is disposed a buffer spring at an insertion joint between the second rotating shaft and the third rotating shaft at which the end of the third rotating shaft is inserted into and fitted with the second jack defined in the second rotating shaft, the buffer spring being used to reduce an impact of vibration between the second rotating shaft and the third rotating shaft;
• wherein the nail grinder further comprises a stepless speed control component, wherein the stepless control component comprises a potentiometer;
• the potentiometer is arranged on a side of the PCB board and is in close contact with the PCB board;
• wherein there is arranged a roller that is rotatably connected to the power output shaft of the potentiometer, and wherein a part of the roller penetrates the shell and is arranged outside the shell.