Automatically retractable water jetting device for closet seat

The utility model relates to an improvement for a structure of an automatically retractable water jetting device for a closet seat. The automatically retractable water jetting device for a closet seat comprises a bracket on which a jet pipe and a driving device are arranged, and the jet pipe is made of an elliptical composite pipe of which one side surface is provided with a gear rack; a rotation shaft of a motor is connected with a driving wheel on the bracket; the driving wheel is connected with a double-connection driving wheel of which one side is a gear through a transmission belt; the gear on the double-connection driving wheel is engaged with the gear rack. The utility model has the characteristics the structure is simple, the manufacture cost is low and the service life is long; the jet pipe is an elliptical shape; the section area of a water flow channel is big; the direction of a minor axis of the jet pipe is provided with the gear rack, and the contact area between the gear rack and the jet pipe is big, which causes the movement to be stable. The arrangement of the driving device and a tension device is favorable to the precise of the kinematic accuracy, etc.