| 摘要 |
PURPOSE:To record in high quality by braking a impacting member by reenergizing a coil, and varying the times of energizing and reenergizing the coil with respect to the area to be impacted to a recording medium by the member, thereby optimizing the hitting force of the member. CONSTITUTION:A magnet coil 1 is energized by an energizing signal Ai for a time TA1, then stopped to bee energized for a time TA1, and the reenergized for a time TA3. A hammer 7 is accelerated in an impacting direction for the time TA1, the end arrives at the position P2 during the energization stopping time TA2, the impacts and then reset toward the initial position by the reaction of a platen 16 and the tension of a return spring 11, but reenergized for a time TA3 immediately before the end arrives at the position P1. Thus, the hammer 7 is again effected by the force in the impacting direction reverse to the returning direction to be braked. Since the hitting force of a type by the hammer 7 is different depending upon the type area, the energizing time for initially impacting the coil 1 is varied in response thereto to obtain the optimum impact force. It is also varied during the energizing stopping time and the reenergizing time.
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