Flat knitting machine mangling device with position varying with gap size

A flat knitting machine mangling device with position varying with gap size, comprising:

• a driving element started when a knock-over bit cam makes a displacement stroke;
• a fixing base disposed on a cam supporting base;
• a sliding base disposed correspondingly to the fixing base and provided with a guide block, the sliding base making a regulation stroke relative to the cam supporting base when the driving element is started;
• a limiting block combined with the fixing base and limiting the sliding base to only slide relative to the cam supporting base;
• a mangling sheet supporting arm fixed to a yarn feeder guide rod with one end of the mangling sheet supporting arm and provided with an installing base on the other end of the mangling sheet supporting arm, wherein a passage is formed in the installing base;
• and
• a mangling sheet comprising a control section connected with the guide block, a connection section extending from the control section and penetrating through the passage, and a mangling section extending from the connection section and facing a needle bed, wherein the control section leads the mangling section to move when the sliding base makes the regulation stroke, so as to change a mangling position.