| 摘要 |
PURPOSE:To facilitate the adhesion and the holding of center part while an adhesive is being cured by providing a projection to a lower flat face of a bottom plate to guide the peripheral part of a repulsing cancel magnet. CONSTITUTION:The structure is adopted that the peripheral part of the cancel magnet 4 magnetized in the direction opposite to a magnet 3 is guided by a projection 5 and adhered to a field comprising the main magnet 3, a top plate 1 and a bottom plate 2 having a projection 5 on the lower flat face. Thus, the adhesion of the repulsing cancel magnet 4 is facilitated, and the magnet 4 is held at the center while the adhesive is being cured to improve the workability and also excellent external appearance is obtained.
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