Pulse water generating mechanism, local cleaning device and intelligent toilet stool

The utility model discloses a pulse water generating mechanism, a local cleaning device and an intelligent toilet stool, the pulse water generating mechanism comprises a body with an internal cavity, a piston which is arranged in the internal cavity and can reciprocate in the internal cavity, and a water inlet and a water outlet which can be communicated with the internal cavity, the piston divides the inner cavity into a first cavity and a second cavity, the water inlet can be communicated with the first cavity, the water outlet can be communicated with the first cavity, and the piston is characterized in that the water inlet is communicated with the second cavity, the second cavity can be communicated with the first cavity, and the water inlet is communicated with the second cavity. When the piston moves towards the second cavity, water in the second cavity flows into the first cavity, and external water flows into the first cavity from the water inlet; when the piston moves towards the first cavity, extern