Differential

A differential comprising:

• a case that rotates around a rotation axis upon receiving a driving force from a driving source;
• a plurality of rotative elements including a pair of output rotators housed in the case;
• a movable member disposed such that the movable member is axially movable along the rotation axis inside the case, the movable member being axially movable toward one side so as to restrict rotation of one of the rotative elements relative to the case;
• and
• an actuator to axially move the movable member, wherein
• the differential is configured to differentially output, from the pair of output rotators, the driving force input to the case,
• the actuator includes
• an electromagnetic coil including a winding and a resin portion, the winding being molded with the resin portion,
• a yoke supporting the electromagnetic coil, and
• an armature that slides on an outer peripheral surface of the electromagnetic coil so as to move axially,
• the yoke includes a side wall including a lateral surface that faces one of axial end faces of the electromagnetic coil,
• the armature includes a cylindrical portion including an inner peripheral surface that faces the outer peripheral surface of the electromagnetic coil and an outer peripheral surface of the side wall, and
• at least one of the outer peripheral surface of the side wall and the inner peripheral surface of the cylindrical portion is provided with an inclined portion inclined relative to a direction parallel to the rotation axis, the inclined portion being configured to restrict the one of the outer peripheral surface of the side wall and the inner peripheral surface of the cylindrical portion from coming into contact with the other one of the outer peripheral surface of the side wall and the inner peripheral surface of the cylindrical portion.