| 摘要 |
PURPOSE:To prevent the levitation of a roller and to reduce driving energy, by providing a spring member supported at one end thereof and engaged with a roller at the other end thereof and pulling the roller of a printing head block by the spring member. CONSTITUTION:A spring member 33 is supported at one end thereof and engaged with a roller 30 at the other end thereof and pulls the roller 30 toward a fixed member 31. Because the levitation of the roller 30 moving on the fixed member 31 is prevented by the pulling force of the spring member 33, adjustment is almost unnecessary and levitation can be stably prevented. Because the spring member 33 is supported at one end thereof, said spring member 33 is elongated against the unidirectional movement of a block 11 and a printing head 10 and imparts strong return force and, therefore, reversal energy can be reduced by the return force applied when driving energy is most required at the reversal time of reciprocal motion. |
