Folding umbrella type weeding mechanism

The utility model provides a folding umbrella type weeding mechanism. The device comprises a shaft barrel (1) and a telescopic mechanism (4) arranged in the shaft barrel (1), a pin shaft (401) of thetelescopic mechanism (4) is fixedly arranged on the shaft barrel (1); a plurality of positioning rings (402) are fixedly arranged on the pin shaft (401) in the axial direction; a sliding ring (405) isarranged between every two adjacent positioning rings (402); a plurality of supporting arms (403) are hinged to the positioning ring (402); a roller is hinged to the other end of the supporting arm (403); the idler wheel is in contact fit with a guide block (407), a rectangular groove is formed in the upper portion of the guide block (407) and used for positioning a handle of the weeding knife, guide columns are arranged on the two sides of the rectangular groove and sleeved with tensioning springs, one end of a push rod (404) is hinged to the middle of the supporting arm (403), and the otherend of the push rod (404)