| 摘要 |
PROBLEM TO BE SOLVED: To control the fusing condition in an adequate condition, by controlling the projecting amount of a display pin in an adequate scope, as well as to form the display pin integrally with a joint main body. SOLUTION: An electric heating wire 4 is buried near the joint 9 of jointed bodies 5 and 6 of a resin layer 3 consisting of a thermoplastic resin which forms a joint main body 2 fusing by contacting to the outer peripheries of the jointed bodies 5 and 6, a recess part 8 is formed to open from the resin layer 3 near the burying part of the electric heating wire 4 to the outer surface side, a hood 13 is formed to the opening 11 in order to make the opening area of the opening 11 smaller than the cross-sectional area of the middle part 12, and a display pin 7 projecting integral from the base 14 of the recess part 8 toward the opening 11 is formed. |
