| 摘要 |
PROBLEM TO BE SOLVED: To accurately position and hold a damper spacer over a long period of time. SOLUTION: A plurality of the damper spacers 6, 6 positioned by the positioning projections 11 provided on the inner surface of a lever holder 10 are laminated on the upper surface of a damper rubber 4 absorbing an impact at the time of the return of a printing lever. By this constitution, even if the force in the surface direction of the uppermost damper spacer 6 acts at the time of the contact with the printing lever, no shift is generated in the damper spacer 6 by the friction force generated between them.
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