Nidec Corporation

Sho Fukuhara

Shinji Takemoto

Mitsuhiro Takemoto

Tsuchitsugu Watanabe

Takashi Shimizu

Hirofumi Takayama

Tomohiro Yokosawa

A motor includes a rotor with one or more magnets, a rotor core holding the one or more magnets, a spacer that contacts the one or more magnets, and a rotor holder. The rotor holder includes a holder lid portion and a holder tubular portion in a tubular shape extending to one side in the axial direction from a radially outer edge of the holder lid portion. The holder lid portion includes a holder first surface that extends radially inward from an inner surface of the holder tubular portion, a holder second surface that extends radially and is radially inward of the holder first surface and on the other side in the axial direction, and a connecting surface connecting the holder first surface and the holder second surface.

Motor

A motor includes a rotor rotatable about a center axis extending vertically, a stator radially opposing the rotor, a bracket holding the stator, a circuit board including an upper surface with a first wiring pattern and a lower surface with a second wiring pattern, and a first fixing portion having conductivity and fixing the circuit board to the stator. The stator includes a stator core having conductivity. The first fixing portion includes a board holding portion holding the circuit board, and a stator fixed portion fixed to a portion of the stator core. The board holding portion is in contact with the first wiring pattern and the second wiring pattern.

In a spindle motor, a cup portion of a base member includes a cylindrical portion and a bottom plate portion. The cylindrical portion is concentric or substantially concentric with a central axis extending in a vertical direction. The bottom plate portion closes a bottom portion of the cylindrical portion. The bearing mechanism is accommodated in the cup portion. An adhesive is arranged between an outer circumferential surface of the bearing mechanism and an inner circumferential surface of the cylindrical portion. At least one of the outer circumferential surface of the bearing mechanism and the inner circumferential surface of the cylindrical portion includes an axially extending vertical groove. A communicating hole which is not filled with the adhesive is arranged in at least a portion of an inside of the vertical groove. The communicating hole extends continuously from an upper to a lower end portion of the vertical groove.

Spindle motor and disk drive apparatus

A base unit includes a base member and a connector. The base member includes a bottom plate portion, a window portion, and a first groove. The first groove is defined in an upper surface of the bottom plate portion around the window portion. The connector includes a board portion and an electrode terminal. The board portion is arranged on the upper surface of the bottom plate portion to cover the window portion and the first groove. The electrode terminal is arranged to overlap with the window portion in the axial direction. An adhesive is arranged between the upper surface of the bottom plate portion and the lower surface of the board portion. The adhesive is arranged to extend continuously in an annular or substantially annular shape around the window portion while being arranged in at least a portion of the first groove.

Growing community of inventors

Kyoto, Japan

Sho Fukuhara