PROBLEM TO BE SOLVED: To provide a blood pump magnetic speed change device that is compact, has sufficient torque transmission performance, and has reliability and durability.SOLUTION: A blood pump magnetic speed change device 10 comprises a pole piece 44 constituted concentrically with a unit side driving magnet 38, a rotating body 46 rotatably arranged concentrically with the pole piece 44, a magnetic gear driven magnet 48 held by the rotating body 46 and arranged opposite to the pole piece 44, and a connection driving magnetic 50 held by the rotating body 46 and capable of being magnetically connected to a connection driven magnet 34 provided in a blood pump 16.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】小型で、十分なトルク伝達能力があり、信頼性及び耐久性がある血液ポンプ用磁気的変速装置を提供する。【解決手段】血液ポンプ用磁気的変速装置１０は、ユニット側駆動磁石３８と同心状に構成されたポールピース４４と、ポールピース４４と同心状に回転可能に配置された回転体４６と、回転体４６に保持されるとともに、ポールピース４４に対向配置された磁気ギア用従動磁石４８と、回転体４６に保持されるとともに、血液ポンプ１６に設けられた結合用従動磁石３４と磁気結合可能な結合用駆動磁石５０とを備える。【選択図】図１
