| 摘要 |
PURPOSE:To shorten the assembling time of a printing head, by providing spring hammers formed into a comblike shape and having a projection provided to the leading end thereof and armatures each selectively hammering each of the spring hammers at the time of printing. CONSTITUTION:An opening 3b is provided to the front surface of the frame 3 of a printing head and grooves 3a, 3a are provided to the opposed side walls of said opening 3b in opposed relationship and the side edges of a spring hammer aggregate 1 are inserted in the grooves 3a, 3a to arrange the aggregate 1 in the opening 3b of the frame 3. Said aggregate 1 is composed of one plate body and a large number of spring hammers 1a, 1a... are formed by punching the plate body in a comblike shape and projections 1b, 1b... are formed to the leading ends of the spring hammers by bending processing so as to be turned forwardly at a right angle. The spring hammer aggregate 1 is mounted to the opening 3b of the frame 3 in a detachable manner so that the projections 1b of the spring hammers 1a are turned forwardly. The armatures 2, 2... hammering the spring hammers 1a are made partially thin to form spring parts 7 and the base parts of the armatures 2 are held between the frame 3 and a permanent magnet 4 to be pivotally supported and the leading ends thereof are positioned on the back surface side of the spring hammers 1a. |
