Pressing rotating structure

A pressing rotating structure, comprising a rotating shaft assembly, a transmission assembly, a pressing assembly, and a housing, wherein

• the rotating shaft assembly comprises a center rotating shaft, and a lower portion of the center rotating shaft is inserted into the housing from a through hole at an upper end of the housing;
• the pressing assembly comprises a key and an elastic member, the key is at least partially located in an opening on a side portion of the housing, and one end of the key is rotatably connected to the housing, so that the key can swing between a first position and a second position;
• a sectorial tooth is formed on the key, and the sectorial tooth drives the center rotating shaft to rotate through the transmission assembly;
• and the elastic member is disposed between the housing and the key, and the elastic member is provided with a compression preload force enabling the key to be maintained at the first position;
• and
• when the key is located at the first position, a pressing portion on the key extends out from the opening, and one end, away from the opening, of the sectorial tooth is engaged with a rotating gear in the transmission assembly;
• and when the key is located at the second position, the pressing portion on the key enters the opening, and one end, close to the opening, of the sectorial tooth is engaged with the rotating gear in the transmission assembly;
• wherein the transmission assembly further comprises an end face fluted disc and a bevel gear;
• and
• the bevel gear is fixedly sleeved at a lower end of the center rotating shaft and is engaged with the end face fluted disc, the end face fluted disc and the rotating gear are coaxially and rotatably sleeved on a first rotating shaft, the first rotating shaft is fixedly connected to the housing, and the end face fluted disc is in transmission connection with the rotating gear.