Control device, motor device, and oil pump device

A control device comprising:

• a control board on which a control circuit for controlling an electric motor is mounted;
• a housing configured to support a surface on a side of the control board in a thickness direction;
• and
• a cover attached to the housing to cover a surface on an other side of the control board in the thickness direction and a periphery of the control board, wherein
• a plurality of first positioning holes penetrating in the thickness direction are formed in the control board,
• a plurality of second positioning holes respectively corresponding to the plurality of first positioning holes are formed in the housing,
• the cover includes a plurality of positioning pins that protrude toward the housing and have a tapered shape in which a diameter of a circumscribed circle gradually decreases toward a tip, and
• the positioning pin is inserted into the first positioning hole and the second positioning hole corresponding thereto to position the control board, the housing, and the cover.