Flat knitting machine yarn feeder with variable yarn feeding positions

A flat knitting machine yarn feeder with variable yarn feeding positions, comprising:

• a driving mechanism controlled by an electronic signal and comprising a driving plate which is making a push stroke after started;
• and
• a yarn feeding mechanism comprising a single joining plate connected with the driving plate and a yarn feeding arm assembled with the joining plate, wherein the joining plate comprises a guide hole, the yarn feeding arm comprises a guide column disposed in the guide hole, the joining plate makes a displacement stroke when the driving plate makes the push stroke, the yarn feeding arm comprises a yarn feeding end facing one of needle beds, the guide column changes a position in the guide hole when the joining plate makes the displacement stroke, and the yarn feeding arm changes a yarn feeding position of the yarn feeding end relative to one of the needle beds when the guide column changes the position,
• wherein the driving plate comprises a bump that is disposed at an end and protrudes towards the joining plate, the joining plate comprises a supporting rail, and the bump is directly connected to the supporting rail, and
• wherein the guide hole comprises two bevels that are disposed oppositely and contacted with the guide column, the two bevels are positioned in a motion direction of the flat knitting machine yarn feeder, the yarn feeding position is changed when the guide column changes the position of one of the bevels, and the guide hole is trapezoidal.