| 摘要 |
PROBLEM TO BE SOLVED: To provide U-shape springs, which prevent magnets from moving in the axial direction, has a small load stress, and is low in cost. SOLUTION: Springs 10 have approximately straight contact parts 12 and 13, which are brought into contact with side parts 20a and 22a in the circumferential directions of magnets 20 and 22, and bent parts 14, which connect the contact parts 12 and 13 to each other with bending diameters larger than distances between the contact parts 12 and 13, in a state where the contact parts 12 and 13 are brought into contact with the magnets 20 and 22. The contact parts 12 and 13 and the bent parts 14 are formed integrally from respective continuous spring wire materials.
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