| 摘要 |
PURPOSE:To prevent solder and a lead wire from being projected out of the outer circumferential, surface of a head by leading the lead wire to squeezed recessed section formed for fixing a treaded type head onto a cylindrical section, and thereby filling solder into the recessed section so as to join the lead wire to the head. CONSTITUTION:A head 7 is screwed in the spiral groove 16 of a cylindrical section 15, a recessed section 30 is formed by squeezing the opening section of a head main body 25 so as to be formed, and the head is stopped in whirl with the recessed section 30 engaged with an engaging groove 17, so that the head is mechanically fixed onto the cylindrical section 15. In addition, one lead wire 27a is led to the outside of the squeezed recessed section 30 so as to be folded, and it is joined to the head main body 25 with solder 33 filled in the recessed section 30. This thereby prevents the lead wire 27a and solder 33 from being projected out of the outer profile of the head main body 25. |
