Patent ID: 8651037
Filing Date: 2014-02-18
Classification: D05B

Abstract:
1. A drive structure for driving an upper thread wiper of a sewing machine, the sewing machine comprising a base and a cantilever extending from the base, on the cantilever being disposed a needle-shaft driving shaft for driving a needle shaft mounted on the cantilever to repeatedly move up and down; the upper thread wiper of the sewing machine being disposed on a wiper arm; a drive device being disposed between the needle-shaft driving shaft and the wiper arm; the drive device being provided with a drive member and a motion-transmission rod for converting rotation of the needle-shaft driving shaft into swing motion of the wiper arm; one end of the drive member being drivingly connected to and driven by the needle-shaft driving shaft; another end of the driving member being pivoted to one end of the motion-transmission rod via a pin; another end of the motion-transmission rod being formed with a cylindrical first inserting portion; one end of the wiper arm being formed with a second pivot portion for insertion of a fixing pivot which is fixed to the cantilever, and the upper thread wiper being fixed at another end of the wiper arm, the wiper arm being formed with a pivot hole, and the first inserting portion serving to drive the wiper arm.