| 摘要 |
PURPOSE:To perform returning operation of a printing wire appropriately irrespective of temperature of a damper member by making magnetic attractive force act on a lever by a method wherein only when temperature of a printing head deviates from an established temperature range, electric current is made to flow to a driving coil in returning. CONSTITUTION:When temperature of a printing head 4 becomes a lower set value or under and otherwise an upper set value or over, a H level signal (B) is outputted from a temperature detection circuit 56, and electric current is forcibly made to flow to a driving coil 5 with a DC driven power source 30 to excite a driving coil 5. Then, a lever 6 having entered a return process is attracted in a reversal direction to a motion direction with the driving coil 5 to abut against a damper member 13 as it is being attenuated. Even though viscoelasticity of the damper member 13 decreases due to excess decrease or excess increase of temperature, the lever 6 is not rebounded thereby, stops under a state of being pressed on the damper member 13, and returning operation is made appropriate. |
