公开(公告)号：US4867584A

公开(公告)日：1989-09-19

申请号：US206554

申请日：1988-06-14

申请人： James G. Savage ,  Brian E. Jagger ,  Tjado V. Namen

发明人： James G. Savage ,  Brian E. Jagger ,  Tjado V. Namen

IPC分类号： B41J9/04 ,  B41J9/127

CPC分类号： B41J9/127 ,  B41J9/04

摘要： An impact mechanism for use in an impact printer, to deliver a printing force to drive a character element against a platen by means of a print tip movable toward and away from the platen. A rockable bail bar having an axis of rotation substantially parallel to the axis of the platen is constrained to limited angular movement toward and away from the platen by a prime mover connected to the bail bar. A push rod interconnects the print tip and the bail bar for delivering impact forces to the platen as the bail bar is moved toward the platen. The push rod is normally of a first length and rigid delivering impact forces to the platen and is collapsible to a second length, shorter than the first length, for drawing the print tip away from the platen so as to allow the character element to be removed. A collapsing mechanism is provided to convert the push rod from the first length to the second length.

摘要翻译： 一种用于冲击式打印机的冲击机构，用于提供打印力，以通过能够朝向和远离压板移动的打印头部将文字元件驱动抵靠压板。 具有基本上平行于台板的轴线的旋转轴线的可摇摆吊环杆被限制为通过连接到吊杆的原动机限制朝向和远离压板的角度运动。 当推杆朝向压板移动时，推杆将打印头和吊杆互相连接，以将冲击力传递到压板。 推杆通常具有第一长度并且刚性地向压板传递冲击力并且可折叠到比第一长度短的第二长度，用于将打印头从纸板上拉出以允许字符元件被移除 。 提供塌缩机构以将推杆从第一长度转换成第二长度。