The print head using a small displacement enlarging mechanism and the mechanism

摘要

PURPOSE:To reduce not only the number of parts to a large extent as compared with a conventional structure but also the number of processes and to enhance assembling accuracy by respectively engaging the fixing mount parts of fine displacement and magnification mechanism with a plurality of the mount grooves provided to a bottomed cylindrical printing unit mount member. CONSTITUTION:Fine displacement and magnification mechanisms 19 are respectively inserted in a large number of the mount grooves 21 radially provided to a printing unit mount member through the horizontal fixing part 11a and vertical fixing part 11b of a fixing frame and projections 18 are engaged with the engaging grooves 25 provided to the upper end surface of the printing unit mount member 20 while respective printing wires 17 are guided by the auxiliary guide member 23 provided to a guide part 22 and inserted in the predetermined holes of a wire arranging member 24 to be arranged. Therefore, a spacer is unnecessary and the number of parts are reduced to a large extent and, since the projections may be merely engaged with the engaging grooves 25, complicated work such as screwing is unnecessary and the number of processes required in assembling are reduced to a large extent and assembling accuracy is enhanced.