| 摘要 |
PURPOSE:To increase the driving efficiency and durability of a printing head by enhancing the bonding strength and by constantly stabilizing the response characteristics of each drive arm by using mechanical connection and bonding together in connecting a drive arm with a movable yoke in a spring-release type printing head. CONSTITUTION:A bush 10 is fixed to the through hole 6a of a drive arm by caulking or pressing, and a movable yoke 11 is passed through the through hole 8a of a yoke plate 8. A shaft 11a is inserted into the hole 10a of the bush 10, and a drive arm assembly in a loosely combined state is set on a tool 19 and an adhesive 12 is charged into the hole 10a of the bush 10. The angle thetaof a mount face 19a to the horizontal face is set up to be equal to the rocking angle of a drive arm 6. The back end face of the yoke 11 can make a face- contact with the end face 13a of a core 13 in a non-conducting retracting state. |
