公开(公告)号：EP0318448A2

公开(公告)日：1989-05-31

申请号：EP88850386.9

申请日：1988-11-09

申请人： FACIT AKTIEBOLAG

发明人： Salminen, Olli Olavi

IPC分类号： B41J9/42 ,  B41J7/34

CPC分类号： B41J2/30 ,  B41J9/42

摘要： A matrix printer includes a printing head which incorpo­rates a plurality of printing needles (11), each of which can be maneuvered individually with the aid of a respec­tive electromagnetic maneuvering device (10), by means of which the printing needle (11), carried by a spring-bias­sed, movable armature (12), can be caused to carry out a working cycle, upon activation of the maneuvering device, this working cycle including a working stroke, during which the needle (11) is moved in a direction towards a printing anvil (20) for the purpose of printing a puncti­form sign on a record carrier (21) located in front of the printing anvil, and a subsequent return stroke, during which the printing needle (11) is returned to a withdrawn rest position. For the purpose of enabling simple inexpen­sive, but nevertheless reliable monitoring of the manner of working of the printer, it is proposed that the move­ment of at least one printing needle (11) during at least a part of a needle working cycle is monitored by detecting changes in the magnetic flux in the magnetic circuit (12, 14) of an associated maneuvering device (10) caused by movement of the needle (11).

摘要翻译： 矩阵式打印机包括一个打印头，该打印头包括多个打印针（11），每个打印针可以分别借助于相应的电磁操纵装置（10）而被操纵，通过该打印针，打印针（11）携带 通过弹簧偏置的可移动电枢（12）可以在启动操纵装置时执行工作循环，该工作循环包括工作行程，在该工作循环期间，针（11）沿着朝向 打印砧座（20），用于在位于打印砧座前方的记录载体（21）上打印点状标志，以及随后的返回行程，在此期间，打印针（11）返回到撤回的静止位置 。 为了使得能够简单廉价但可靠地监测打印机工作方式的目的，提出了在针工作循环的至少一部分期间至少一个印刷针（11）的移动通过检测 由针（11）的运动引起的相关联的操纵装置（10）的磁路（12,14）中的磁通量的变化。

公开(公告)号：EP0318449A2

公开(公告)日：1989-05-31

申请号：EP88850387.7

申请日：1988-11-09

申请人： FACIT AKTIEBOLAG

发明人： Salminen, Olli Olavi

IPC分类号： B41J9/42 ,  B41J7/34

CPC分类号： B41J9/42 ,  B41J2/30

摘要： A matrix printer comprises a printing head which includes a plurality of printing needles (11) each having a respective electromagnetic maneuvering device (10) by means of which the needle, carried by a spring-biassed, movable armature (12), can be caused to carry out a working cycle, which includes a working stroke and a subsequent return stroke. The maneuvering device (10) is activated by temporarily lowering the magnetomotive force in the magnetic circuit (12,14) of the device from a previous, constant value. The previously attracted armature (12) will herewith commence to move in a direction away from the stationary part (14) of the magnetic circuit as a result of the spring force acting on the armature. The magnetomotive force is then caused to return to its previous value. For the purpose of reducing the noise and wear generated by the armature (12) and to reduce the tendency of the armature to rebound, the armature is slowed down during the final stage of its return stroke, by again lowering the magnetomotive force temporarily for a limited part of the time taken to effect the return stroke.

摘要翻译： 矩阵式打印机包括一个打印头，该打印头包括多个打印针，每个打印针具有相应的电磁操纵装置，通过该打印头可以引起由弹性偏置的可动电枢（12）承载的针 执行工作循环，其中包括工作冲程和后续回程。 通过将装置的磁路（12,14）中的磁动势从先前的常数值暂时降低来激活操纵装置（10）。 由于作用在电枢上的弹簧力，先前吸引的电枢（12）将随着开始朝着离开磁路的静止部分（14）的方向移动。 然后使磁动势返回到其先前的值。 为了减少由电枢（12）产生的噪声和磨损并且减小电枢回弹的倾向，在其返回行程的最后阶段期间，电枢减速，通过再次将磁动势暂时降低为一个 有限的部分时间用于实现回程。

公开(公告)号：EP0318449A3

公开(公告)日：1989-07-26

申请号：EP88850387.7

申请日：1988-11-09

申请人： FACIT AKTIEBOLAG

发明人： Salminen, Olli Olavi

IPC分类号： B41J9/42 ,  B41J7/34

CPC分类号： B41J9/42 ,  B41J2/30

摘要： A matrix printer comprises a printing head which includes a plurality of printing needles (11) each having a respective electromagnetic maneuvering device (10) by means of which the needle, carried by a spring-biassed, movable armature (12), can be caused to carry out a working cycle, which includes a working stroke and a subsequent return stroke. The maneuvering device (10) is activated by temporarily lowering the magnetomotive force in the magnetic circuit (12,14) of the device from a previous, constant value. The previously attracted armature (12) will herewith commence to move in a direction away from the stationary part (14) of the magnetic circuit as a result of the spring force acting on the armature. The magnetomotive force is then caused to return to its previous value. For the purpose of reducing the noise and wear generated by the armature (12) and to reduce the tendency of the armature to rebound, the armature is slowed down during the final stage of its return stroke, by again lowering the magnetomotive force temporarily for a limited part of the time taken to effect the return stroke.

公开(公告)号：EP0318448A3

公开(公告)日：1989-07-26

申请号：EP88850386.9

申请日：1988-11-09

申请人： FACIT AKTIEBOLAG

发明人： Salminen, Olli Olavi

IPC分类号： B41J9/42 ,  B41J7/34

CPC分类号： B41J2/30 ,  B41J9/42

摘要： A matrix printer includes a printing head which incorpo­rates a plurality of printing needles (11), each of which can be maneuvered individually with the aid of a respec­tive electromagnetic maneuvering device (10), by means of which the printing needle (11), carried by a spring-bias­sed, movable armature (12), can be caused to carry out a working cycle, upon activation of the maneuvering device, this working cycle including a working stroke, during which the needle (11) is moved in a direction towards a printing anvil (20) for the purpose of printing a puncti­form sign on a record carrier (21) located in front of the printing anvil, and a subsequent return stroke, during which the printing needle (11) is returned to a withdrawn rest position. For the purpose of enabling simple inexpen­sive, but nevertheless reliable monitoring of the manner of working of the printer, it is proposed that the move­ment of at least one printing needle (11) during at least a part of a needle working cycle is monitored by detecting changes in the magnetic flux in the magnetic circuit (12, 14) of an associated maneuvering device (10) caused by movement of the needle (11).