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    • 20. 发明授权
    • Printing head of the impact type
    • 打印头的冲击类型
    • US4986676A
    • 1991-01-22
    • US387674
    • 1989-07-31
    • Koichi KimuraTakeshi MatsumotoFumio Otsuka
    • Koichi KimuraTakeshi MatsumotoFumio Otsuka
    • B41J2/275
    • B41J2/275
    • A printing head includes a plurality of printing levers, each having a front end portion and a rear end portion, with each printing lever being rotatable about its rear end portion. An electromagnetic drive is operable to individually drive the printing levers in a driving direction so as to apply a printing force to printing elements operated by the printing levers. Resilient springs operatively associated with the printing levers resiliently apply a return force to each of the printing levers in a return direction opposite to the driving direction. Stopper devices are disposed to be operatively engaged by each of the printing levers upon application of the printing force to thereby preclude contact between each of the printing levers and the electromagnetic drives upon application of the printing force.
    • 打印头包括多个打印杆,每个打印杆具有前端部分和后端部分,每个打印杆可围绕其后端部分旋转。 电磁驱动器可操作以在驱动方向上独立地驱动打印杆,以便将打印力施加到由打印杆操作的打印元件上。 与打印杆可操作地相关联的弹性弹簧在与驱动方向相反的返回方向上弹性地向每个打印杆施加回复力。 在施加打印力时,止动装置设置成与每个打印杆可操作地接合,由此在施加打印力时阻止每个打印杆和电磁驱动器之间的接触。