Motor having two or more circuit boards

A motor in which circuit boards for controlling the motor are attached within a housing comprising:

• first and second circuit boards each having an insertion hole whereby the inner diameter of each board is approximately the same;
• a rotating part having at least one rolor magnet arranged in a circular manner;
• a stator having a coil which is connected to circuits of the circuits boards, the stator located confronting the rotor magnet in radial direction;
• a cylindrical sleeve for fixing an inner periphery of the stator to an outer periphery surface thereof including:
• a first board attachment portion having a first board supporting area extending in the radial direction of the sleeve;
• and
• a second board attachment portion having a second board supporting area that extends in the radial direction of the sleeve and is formed to be apart from the first board supporting area in the axial direction of the sleeve;
• wherein
• the first board has a first inserting hole into which the sleeve and the second board attachments portion are inserted and is fixed to the first board supporting area, and
• the second board has a second inserting hole into which the sleeve main body is inserted and is fixed to the second board supporting area;
• a bracket for fixing the sleeve;
• and
• a bearing part arranged between an outer periphery of the rotating part and an inner periphery of the sleeve for supporting the rotating part so as to rotate about a rotational axis.

A motor in which circuit boards for controlling the motor are attached within a housing, the motor comprising:

• two or more circuit boards each having an inserting hole;
• a rotating part having at least one rotor magnet arranged in a circular manner;
• a stator having a coil which is connected to circuits of the circuit boards, the stator located confronting the rotor magnet in radial direction;
• a cylindrical sleeve for fixing the stator to the periphery thereof including:
• board attached virtual planes of two or more layers at which the two or more circuit boards are positioned, which are separately arranged in parallel to each other and board attachment portions formed at the periphery of the sleeve, wherein the board attachment portions have board supporting areas for fixing the circuit boards, the sleeve has Three or more board attachment portions arranged at rotational symmetry manner around the rotational axis for each circuit board, and
• each circuit board penetrated by the sleeve through the inserting hole and fixed to the board attachment portion;
• a bracket for fixing the sleeve;
• and
• a bearing part arranged between the rotating part and the sleeve for holding the rotating part so as to rotate about a rotational axis.