| 摘要 |
PURPOSE: To ensure the connection of a metal member and an insulating member by forming a enlarged part swelled at the tip part of the metal member connected with the insulating member and fitting the enlarged part to the enlarged part of a hole in a longitudinal direction hole. CONSTITUTION: The free end of the tip part 7' of a metal member 7 has an annular swelled part and the dimension is a little larger than the dimension of the part in which an annular groove of a longitudinal direction hole 2 is spread. An insulating member 1 has tension and surrounds the swelled part. Within the longitudinal direction hole 2, the part between the annular swelled part and the tip part 7" of the metal member 7 is formed into the conical corresponding to the internal surface of the conical contour of the hole 2 and has an annular groove 10 at the space in the axial direction. As a result, the metal member 7 supports the insulating material 1 at this location by only an annular projection projecting in the radial direction, the insulating material 1 can be a little deformed toward the annular groove 10, the connection of the metal member 7 and the insulating member 1 is established and the operation force from the insulating material 1 to the metal member 7 is surely transmitted.
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