Impact control for carrier mounted serial printers

A printing device in a typewriter comprising:

• a rocker bracket turnable in a direction of printing a letter by a cam rotated when a key is pressed;
• a type head vertically movably and rotatably supported by said rocker bracket;
• a vertically movable pulley and a rotatable pulley which are mounted on said rocker bracket and rotated by a predetermined value in accordance with a letter selected by the key;
• a mechanism for transmitting a movement of the vertically movable pulley to the type head to vertically move the type head;
• and
• a mechanism for transmitting a movement of the rotatable pulley to the type head to rotate the type head;
• wherein said printing device further comprises:
• a printing arm for pivotally supporting a trigger detachably engageable with said rocker bracket and abutting against and being rotated by said cam to turn the rocker bracket;
• vertical direction selecting means movable to a predetermined position in accordance with a value of rotation of the vertically movable pulley;
• rotational direction selecting means provided on the rotatable pulley;
• and
• a printing pressure control member movable in accordance with movements of the vertical direction selecting means and the rotational direction selecting means and having at least two abutting portions within a moving path of the trigger;
• whereby the position of the printing pressure control member is set by said respective selecting means, and the trigger is caused to impinge on a portion selected out of the abutting portions, so that a position where the rocker bracket is to be released can be adjusted, thereby enabling the adjustment of the printing pressure.