Nidec Corporation

Ryo Furuya

Michihiro Ito

Kenta Miyoshi

Takashi Mitsunari

Masahiro Imahori

Seiji Maruoka

Koutarou Miyata

Genya Itagaki

A base plate becomes a part of a housing of a disk drive device and is made of a metal die-cast member. The base plate includes a bottom wall portion and a cylindrical wall portion. The bottom wall portion extends perpendicular to a rotation axis of a disk extending in a vertical direction. The cylindrical wall portion protrudes upward from an upper surface of the bottom wall portion along the rotation axis and has a shaft through hole through which a shaft is inserted. The cylindrical wall portion has an annular stepped portion that protrudes radially outward from an outer peripheral surface of a root portion. A processed surface is formed on at least a part of an outer peripheral surface of the stepped portion.

Base plate, spindle motor, disk drive device, and base plate manufacturing method

A base plate is a portion of a housing of a disk driving device having a disk rotating with a rotation axis as a center, and is a cast product. The base plate has a bottom plate part and a peripheral wall part. The bottom plate part has a rectangular shape when viewed in an axial direction. The peripheral wall part extends from an outer peripheral edge of the bottom plate part toward a side of the axial direction to surround the periphery of the bottom plate part. A metal member embedded in the peripheral wall part is provided.

Base plate with metal member embedded in the peripheral wall part, motor, and disk driving device having the same

A base plate includes a base body including a bottom plate and a pivot post, and an electrodeposition coating film. The bottom plate extends perpendicular to a first axis, a rotation axis of the disk, and a second axis, a swing axis of a head; and, when viewed from an axial direction, has a rectangular shape with a first direction as a short side direction and a second direction as a long side direction. The pivot post protrudes upward from an upper surface of the bottom plate at a position overlapping the second axis. The bottom plate has a thin bottom arranged in a radially outward direction orthogonal to the second axis of the pivot post and including at least one of a lower recess recessed upward from a lower surface of the bottom plate and an upper recess recessed downward from the upper surface of the bottom plate.

Base plate, spindle motor and disk drive

A base plate is a portion of a housing of a disk drive apparatus, including a base body being a casting product, and an electrodeposition coating film covering at least a portion of a surface of the base body. The base body includes a bottom plate rectangular as viewed from an axial direction, a pivot post, and a protrusion. The bottom plate extends perpendicular to a rotation axis of a disk that extends vertically and a swing axis of a head that is disposed in a different position from the rotation axis and that extends vertically. The head reads or writes information from or to the disk. The pivot post protrudes upward from an upper surface of the bottom plate along the swing axis. The protrusion is provided protruding radially outward from a peripheral surface of the pivot post and protruding to the upper surface of the bottom plate.

Growing community of inventors

Kyoto, Japan

Ryo Furuya