Motor for suppressing entry of foreign matter

A motor comprising:

• a rotor including a rotary shaft;
• a housing supporting the rotary shaft;
• a facing member that is fixed to the housing and includes a part facing the rotary shaft;
• a first bearing that is formed so as to support an end part of the rotary shaft and is supported by the housing;
• a second bearing that is supported by the housing and is arranged coaxially with the first bearing;
• a seal member that has elasticity and is formed in an annular shape;
• and
• an annular member supporting the seal member, wherein
• the seal member has an inner end part and an outer end part, wherein the inner end part in a radial direction comes in contact with the rotary shaft and the outer end part in the radial direction comes in contact with the facing member,
• the annular member is formed so as to rotate about the same rotation axis as the rotary shaft,
• the annular member is fixed to an inner ring of the second bearing,
• the inner ring of the second bearing, the annular member, and the seal member are integrally rotated,
• first magnetism generating members that generate magnetism are arranged on an outer circumferential surface of the rotary shaft,
• second magnetism generating members that generate magnetism are arranged on an inner circumferential surface of the annular member so as to face the first magnetism generating members,
• the first magnetism generating members and the second magnetism generating members are formed such that the annular member is rotated by magnetic force in the same direction as the rotary shaft when the rotary shaft rotates, and
• the seal member rotates with the annular member at a rotation speed that is lower than a rotation speed of the rotary shaft.