Rolling gear, comprising a winding wheel (1) and a drive shaft (2),installed on a body (21) characterized by the fact that the drive shaft (2) is equipped with a guide piece (3) which can move and move in its axial direction, the winding wheel (1) rotating in sync with the drive shaft (2), the guide piece (3) is fitted with a positioning slot (4), with a cable (5) wrapped around the winding wheel (1), with the cable (5) running through the positioning slot (4), and with the upper end of the guide piece (3) with a coupling mechanism to realize a connection between the drive shaft (2) and the guide piece (3) is provided.
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