| 摘要 |
PURPOSE:To easily hold a print head at an exact position by a method in which a part of a torsion spring is pierced through a window provided in a metal tool with a torsion spring and then coupled with a concaved portion provided on the contact face between the print head and the metal tool. CONSTITUTION:An assembly is made up of a print head 10 and a metal tool 20. The torsion springs 25 whose each end parts are connected with a connecting portion 26 are atached to a shaft 21 inside the tool metal 20, the other end parts of the springs 25 are bent into -shaped form, and the ends of the bent portions are projected from a window 28 formed in the side 22 of the metal tool 20 to the outside. The head 10 consists of a shaft 13, a head 11, and a fitting portion between the shaft 13 and the head 11. When assembling the metal tool 20 and the head 10 in such a way that the long side 23 of the metal tool 20 is put in a space between the head 11 and the fitting portion 12, the bent end portion of the torsion springs 25 is fitted into the concaved portion 14 formed on the side facing to the fitting portion 12 of the head 11 of the print head 10. |
