公开(公告)号：DE3682784D1

公开(公告)日：1992-01-23

申请号：DE3682784

申请日：1986-01-17

Applicant: IBM

Inventor： EVANS VAUGHN ROBERT ,  THORPE ALLAN CHESTER ,  HARRIS RICHARD HUNTER ,  WATTS JOHN EDWARD

IPC: B41J2/235 ,  B41J2/265 ,  B41J9/42 ,  B41J2/23

Abstract: @ The invention is a magnetically actuated clapper-style armature wire matrix print head. A unitary molded straight line channel wire matrix wire guide (1) is molded as a single pert. The flux return member (10) is a single formed part with attached magnetic cores (17). The magnetic cores (17) have thermal contact with attached or integral heat sink means (8) that extend from the flux return member in the axial direction with the cores and which may be integrated with the support frame for the print head structure. A rebound absorbing backstop member (33) receives the armatures on the rebound but also serves as a means of maintaining pivotal contact between the end of the armatures (25) and the top edge of the flux return member so that a continuous flux path from the flux return member, through the armature and down through the cores of the electromagnets can be attained.