| 摘要 |
PURPOSE:To reduce the number of assembling steps and the assembling cost, by clamping an assembly by arch-shaped ring springs at the time of fixing the assembly, in a printing head for a releasing-type serial dot printer. CONSTITUTION:An armature member and a magnetic bypath 24 are placed on an electromagnet mechanism part (a permanent magnet 20 and a core 21) with a spacer 23 placed therebetween, and after fitting a nose 31 thereon, ring springs 30 are placed at 4 positions, and are gradually pressed further onto the nose 31 and a recessed surface of a lower part of the core 21 against the forces of the spring 30. Accordingly, the assembly is firmly clamped by the springs over the entire circumference thereof. |
