| 摘要 |
PROBLEM TO BE SOLVED: To prevent shaft holes of arm parts from unexpectedly separating from spindles by an inexpensive structure. SOLUTION: A T-shape hole 50 is formed at a bottom plate part 1b of a base frame 1. A guide piece 51a engaged to be fittable and separable to a guide groove 50a of the T-shape hole 50 is set projecting integrally with the arm part 16d of a frame 16 with a thermal head 9. An L-shape piece 52 is projected integrally with a bearing plate 17 side from a base end of the arm part 16d. A stopper piece 53 is set projecting integrally with an upper end of the bearing plate 17. The shaft holes 46 of both arm parts 16c and 16d are positioned concentrically to the spindles 17a respectively by engaging the guide pieces 51a with the guide grooves 50a. Thereafter, the shaft holes 46 of both arm parts 16c and 16d are fitted in the spindles 17a by sliding the guide pieces 51a along the guide grooves 50a, and both arm parts 16c and 16d are rotated to platen roller sides. A clearanceβbetween the L-shape piece 52 and the arm part 16d is loosely fitted into the stopper piece 53. COPYRIGHT: (C)2006,JPO&NCIPI
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