| 摘要 |
PURPOSE:To make printing wires unbreakable by a method in which plural guide holes are provided in a specific state in a bearing, and the flexing angle and biasing angle of the printing wires are decreased. CONSTITUTION:Guide holes 51-54 and 71-74 are provided in both ends on the straight line of the inside two of four straight lines in almost parallel with each other, having fixed lengths. Guide holes 55-70 are also provided at the center of the outside two straight lines. By setting up the interline pitches M and K properly, biasing angle phi of the printing head guided by the guide holes 51-54 and 71-74 can be greatly decreased, and the flexing angle of the printing wires guided by the guide holes 55-70 can also be reduced. |
