| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent separation of a spring wire from a screw-shaped spiral body even when a coil spring is bent and deformed by external force in a state of screwing and connecting the coil spring with a mounting object by utilizing its coil structure. SOLUTION: The coil spring 10 is formed into the cylindrical shape by closely winding the spring wire. The spiral bodies 16, 21 of the connection objects 14, 20 are respectively composed of trough parts 16a, 21a having partial circular arc-shaped cross sections and crest parts 16b, 21b held between adjacent trough parts 16a, 21a. A spiral pitch P of the spiral bodies 16, 21 is determined to be same as a coil pitch P1 of the coil spring, and a radius R of a circular arc face of the trough parts 16a, 21a is determined to be same as a radius R1 of the spring wire. When female screw-shaped spiral bodies 16, 21 are formed on inner faces of the cylindrical connection objects 14, 20, a diameter D of the trough parts 16a, 21a of the spiral bodies 16, 21 is determined to be same as a coil outer diameter D1 of the coil spring, and an outer peripheral face of the spring wire is received by the trough parts 16a, 21a in a face-contact state. COPYRIGHT: (C)2006,JPO&NCIPI
|
