| 摘要 |
PURPOSE:To improve mass-productivity and operativity and to reduce a ring for magnetic signal generation in size and improve its mechanical strength by embedding a resin magnet in a ring made of synthetic resin and forming the ring for magnetic signal generation. CONSTITUTION:The resin magnet 2 formed previously in a ring shape is embedded and fixed in the outer peripheral surface, etc., of the ring 1 made of synthetic resin to form the magnetic signal generation ring. The resin magnet 2 may be embedded in the annular end surface part of the synthetic resin ring 1. Consequently, the ring is reduced in weight on the whole because the resin magnet is used and easily manufactured, and the ring is reinforced by the synthetic resin ring, so the magnet never breaks when the ring is fitted. |
