| 摘要 |
A coiled spring has two ends and a number of intermediate coils, each coil having a leading portion disposed at a front angle to a normal line to one centreline and a trailing portion disposed at a back angle to the normal line. End coils congruent with the number of intermediate coils, disposed at the two ends and having back angle member, defining a trailing portion of at least one end coil, for locking the two end coils together. The end coil trailing portion having a back angle different from the intermediate coil trailing portion back angle, the end coils having smaller diameters than the intermediate coils. The end coils is a male end extending outwardly from the intermediate coils along a centreline and another of the end coils is a female end disposed interior to the intermediate coils. |
