Wire feeder used in a knitting machine for feeding yarns, comprising: - A base frame fixedly fixed to a part of the jacquard machine; A horizontal plate fixedly fixed to said base frame on an upper side, said horizontal plate having a plurality of threaded eyelets for guiding threads; A drive wheel mounted on said base frame on an upper side; A position plate fixedly fixed to said base frame on a lower side, said position plate having two parallel rows of threaded eyelets spaced vertically to guide threads; A unit of wire guide wheels suspended below said base frame and coupled with said drive wheel, said wire guide wheel unit being composed of a plurality of wire guide wheels and a plurality of rubber bands mounted respectively on said wire guiding wheels, each of said wire guiding wheels having a peripheral wall emptied by forming the rubber band on each of said wire guiding wheels an annular convex part around the periphery of the guide wheel of the respective yarn and dividing the emptied peripheral wall of the respective yarn guiding wheel into an upper threaded flute and a lower threaded flute; y- A plurality of yarn tensioning consoles fixedly fixed to said position plate on one side at different heights corresponding to said yarn guiding wheels, each of said yarn tensioning consoles being composed of a yarn tensioning beam, a housing, a lid plate, an adjustment plate, an adjusting screw, a spring member, and a connection plate, said wire tensioning rod being pivotal with respect to said seat and having an upper threaded eye and a lower threaded eye arranged at one end remote from said housing, said housing having a threaded hole in one end thereof, said connecting plate having one end connected to said thread tensioning beam and an opposite end connected to said spring member within said housing said spring member having an end connected to said connection plate within said housing and an opposite end connected to said terminal. Said adjustment plate, said adjustment plate being disposed within said housing and connected to said spring member, said adjustment screw being screwed into the threaded hole at one end of said housing and connected to said adjustment plate, and rotating in said threaded hole to adjust the elastic force of said spring member, allowing to adjust the tension of said thread tensioning beam, characterized in that: - Said housing comprises a countersunk hole and a bearing mounted in the countersunk hole in said housing; Said lid plate comprises a countersunk hole and a bearing mounted in the countersunk hole in said lid plate; A pivot shaft is supported on the bearing in said housing and the bearing in said cover plate, said pivot shaft comprising a first round pin and a second round pin respectively, axially extended from two opposite ends thereof in opposite directions and inserted respectively through the bearing in said housing and of the bearing in said cover plate, and a u-shaped rod that rises perpendicularly from the periphery thereof and hooked on one end of said connection plate; The thread tension stick of each of said wire tension consoles comprises a first wire rod and a second wire rod, said first wire rod having a first end terminating at an eyelet end attached to the first round pin of wire. Said pivot shaft and suspended above said housing and a second end suspended outside said housing, said second wire rod having a first end terminating at an eyelet end attached to the second round pin of said pivot shaft and suspended below said cover plate and a second end suspended outside said housing and said cover plate; The lower threaded eye and the upper threaded eye of the thread tension beam of each of said wire tension consoles are respectively formed in one piece with the second end of the first wire rod and the second end of the second wire of the second wire rod. Wire of the thread tensioning arm of the tensioning console of the synchronous sensor. (Machine-translation by Google Translate, not legally binding)