Massager based on crank impact structure

The utility model relates to the technical field of massagers, in particular to a massager based on a crank impact structure, which comprises an outer shell, a transmission shaft, a sliding sleeve and a vibration motor sleeve, an upper inner shell and a lower inner shell are arranged in the outer shell, and the upper inner shell and the lower inner shell are buckled to form a hollow cavity with an opening in the upper end. A PCBA board, a gearbox motor and a battery are arranged in the cavity, the PCBA board is electrically connected with the gearbox motor and the battery, the output end of the gearbox motor is connected with a rotating shaft, the end, away from the gearbox motor, of the rotating shaft is fixedly connected with a transmission shaft, the transmission shaft is fixedly connected with a sliding connecting rod, and the sliding connecting rod is fixedly connected with the transmission shaft. The sliding connecting rod penetrates through the sliding sleeve from inside to outside and then is fixedly