Drive mechanism including brushed motor

A drive mechanism including a brushed motor comprising:

• a brushed motor including a commutator having a plurality of commutator segments and a brush contactable to the plurality of commutator segments;
• a movable member driven by the brushed motor;
• and
• a stopper member configured to stop rotation of the brushed motor by contacting the movable member, wherein
• in a state in which the movable member contacts the stopper member to thereby stop the rotation of the brushed motor, the brush contacts only one of two adjacent commutator segments of the plurality of commutator segments,
• the plurality of commutator segments is adjacent to each other with a slit therebetween,
• the brush includes a pair of brush segments located at positions sandwiching the commutator,
• assuming that a first state is to a state in which a straight line passing through a center of rotation of the commutator and a center of the pair of brush segments is orthogonal to one of straight lines connecting a circumferential center of the slit and the center of rotation of the commutator,
• in a state in which the movable member contacts the stopper member to thereby stop the rotation of the brushed motor, an opening portion of the slit and the brush are positioned not to overlap with each other when viewed from a direction perpendicular to an axis of rotation, and
• the commutator is located at a position rotated at an angle of less than or equal to 10 degree relative to the brush with reference to the first state.