| 摘要 |
A damping system used for controlling the rebound of actuator members used in high speed printers or the like is disclosed. The system involves the use of the principle that when masses collide in an elastic collision, the kinetic energy of the system remains constant. In the system, a secondary mass is free for limited movement between restraining walls at least one of which is of energy absorptive material and is positioned in the path of a rebounding actuator element. The collision between the actuator element and the mass results in a transference of kinetic energy to the secondary mass which energy is rapidly dissipated as the secondary mass collides with the energy absorptive material. Also disclosed is a holding coil for holding the actuator element following the collision with the primary mass and an intermittently operable firing coil which when energized overrides the holding force and fires the actuator element.
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