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    • 8. 发明授权
    • Printing hammer assembly with a hammer dampener comprising two opposed
permanent magnets
    • 具有包括两个相对的永磁体的锤式缓冲器的打印锤组件
    • US4530280A
    • 1985-07-23
    • US570492
    • 1984-01-13
    • Nobuo KanekoTakeshi TakemotoHiroshi Yasuda
    • Nobuo KanekoTakeshi TakemotoHiroshi Yasuda
    • B41J2/285B41J9/38B41J9/42B41J9/00
    • B41J9/38
    • A printing hammer assembly for use in impact printers includes a printing hammer which has an impact surface and an armature and which is supported to be movable in a reciprocating manner along its longitudinal axis, a driving solenoid which drives to move the printing hammer forward when energized against the force of a coil spring which normally applies a biasing force to the printing hammer in the backward direction and a yoke leading a magnetic flux produced by said solenoid to the armature of printing hammer. A pair of magnets are disposed such that they are magnetically repulsive to each other with one of them fixed in position and the other movable over a predetermined distance thereby allowing to absorb the rebounding energy of the hammer when it returns to its home position.
    • 用于冲击式打印机的打印锤组件包括具有冲击表面和电枢的打印锤,该打击锤被支撑成沿着其纵向轴线往复运动地运动,驱动螺线管驱动以在通电时向前移动打印锤 抵抗通常在打印锤向后方向施加偏置力的螺旋弹簧的力,以及将由所述螺线管产生的磁通量引导到打印锤的电枢的轭。 一对磁体被布置成使得它们彼此磁性排斥,其中一个固定在适当位置,另一个磁体可移动超过预定距离,从而允许当其回到其初始位置时吸收锤的回弹能量。