MOTOR

PROBLEM TO BE SOLVED: To provide a motor capable of suppressing an occurrence of such a situation that a rotor becomes unrotatable even when there occurs a situation where a rotation shaft and a bearing member move in such a direction that both separate from each other.SOLUTION: In a motor 1, when the gap between an outer peripheral surface 3c of a magnet 3 and an inner peripheral surface 10c of a stator 10 is G, the radius of a sphere 6 is r, the angle formed by a center axis Ls and a conical surface 2h of a rotation shaft 2 is , and the distance between an opening edge of the conical surface 2h and the center axis Ls of the rotation shaft 2 is R, the movable distance d, the radius r, the gap G, the angle , and the distance R satisfy a conditional express 1: R>r-cos +d-tan and a conditional express 2: G>d-tan . Due to this, a bearing member 7 is displaced to a counter output side L2 and the rotation shaft 2 is inclined, the sphere 6 is prevented from getting out of the conical surface 2h and the magnet 3 is prevented from being attracted to the stator 10. 【課題】回転軸と軸受部材とが離間する方向に移動するような事態が発生した場合でも、ロータが回転不能となる事態の発生を抑制することのできるモータを提供すること。【解決手段】モータ１において、磁石３の外周面３ｃとステータ１０の内周面１０ｃとの間隔をＧとし、球体６の半径をｒとし、回転軸２の中心軸線Ｌｓと錐面２ｈとが成す角度を とし、錐面２ｈの開口縁と回転軸２の中心軸線Ｌｓとの距離をＲとしたとき、可動距離ｄ、半径ｒ、間隔Ｇ、角度 、および距離Ｒが、以下の条件式１および条件式２条件式１：Ｒ＞ｒ・ｃｏｓ ＋ｄ・ｔａｎ 条件式２：Ｇ＞ｄ・ｔａｎ を満たしている。このため、軸受部材７が反出力側Ｌ２に変位して、回転軸２が傾いても、球体６が錐面２ｈから外れず、磁石３がステータ１０に吸着することもない。【選択図】図２