Water inlet mechanism and oral irrigator

The utility model provides a water inlet mechanism and an oral irrigator, and relates to the technical field of tooth cleaning instruments, the water inlet mechanism comprises an assembly shell, a valve plate assembly and a joint, a flow channel and a water inlet interface communicated with the flow channel are arranged in the assembly shell, and a clamping table is arranged on the inner side wall of the water inlet interface along the circumferential direction of the water inlet interface; the valve plate assembly is installed in the water inlet connector and comprises a fixed ring plate and a valve plate, the fixed ring plate is annularly arranged, the valve plate is arranged in an annular space of the fixed ring plate, one end of the valve plate is fixedly connected to the annular inner wall of the fixed ring plate, and the other end of the valve plate and the inner wall of the fixed ring plate are arranged at an interval; the valve plate assembly is simple in structure, the assembling process is simple, t