PRINT HEAD ASSEMBLY CONTAINING SOLENOIDS

摘要

A solenoid for actuating a print wire normally biased against the impact direction by "wagon wheel" spring means. Energization of the solenoid coil rapidly moves the print wire in the impact direction against the bias of the spring. Release of the energy supplied to the solenoid coil causes very rapid return of the print wire to the non-printing position. The "wagon wheel" spring structure, which undergoes both bending and twisting in a predetermined sequence, allows for rapid initial acceleration of the print wire in the impact direction while providing for rapid return of the print wire to the non-print position while significantly reducing "bouncing" or "overshooting".