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1. 发明授权

US09990959B1 Disk drive base with decreased thickness portion angle being less than increased thickness portion angle 有权
公开(公告)号：US09990959B1
公开(公告)日：2018-06-05
申请号：US15834113
申请日：2017-12-07
申请人： Nidec Corporation
发明人： Michihiro Ito , Yasutaka Ino , Masaya Haraguchi
IPC分类号： G11B33/02 , G11B25/04
CPC分类号： G11B33/022 , G11B25/04 , G11B25/043
摘要： A base of a disk drive apparatus includes a bottom plate portion and a wall portion. The wall portion includes an increased thickness portion and a decreased thickness portion. An inner surface of the increased thickness portion includes a first slanting surface arranged to extend radially outward away from a central axis while extending axially away from the bottom plate portion. An inner surface of the decreased thickness portion includes a second slanting surface arranged to extend radially outward away from the central axis while extending axially away from the bottom plate portion, and protrude radially inward relative to the first slanting surface. An inclination angle of the second slanting surface with respect to an axial direction is arranged to be smaller than an inclination angle of the first slanting surface with respect to the axial direction.

2. 发明授权

US09879691B2 Dynamic pressure bearing pump 有权
公开(公告)号：US09879691B2
公开(公告)日：2018-01-30
申请号：US14820678
申请日：2015-08-07
申请人： Nidec Corporation
发明人： Junya Mizukami , Hideki Nishimura , Yoshito Nishitani , Michihiro Ito , Naohiro Nagasawa
IPC分类号： F04D29/18 , F04D3/00 , F04D5/00 , F04D11/00 , F04D13/06 , F04D29/047
CPC分类号： F04D29/186 , F04D3/00 , F04D5/001 , F04D11/00 , F04D13/0633 , F04D29/0476
摘要： A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet.

3. 发明授权

US10236745B2 Motor 有权
公开(公告)号：US10236745B2
公开(公告)日：2019-03-19
申请号：US15356742
申请日：2016-11-21
申请人： Nidec Corporation
发明人： Michihiro Ito , Mitsuo Kodama , Tadashi Hasegawa
IPC分类号： H02K5/22 , H02K3/52 , H02K19/00 , H02K21/00
摘要： A circuit board is in the shape of a strip and includes: in one longitudinal end portion thereof, power connection portions connected to an external power supply; in another longitudinal end portion thereof, land portions to which portions of conducting wires drawn out downwardly of a base portion are connected; and pattern portions electrically connected to the power connection portions and the land portions. The land portions include a first land portion, and a second land portion arranged adjacent to the first land portion. The pattern portions include a first pattern portion electrically connected to the first land portion, and a second pattern portion arranged adjacent to the first pattern portion, and electrically connected to the second land portion. The first pattern portion and the second land portion are arranged to overlap with each other when viewed in a widthwise direction of the circuit board. Alternatively or additionally, the first and second land portions are arranged to overlap with each other when viewed in a longitudinal direction of the circuit board.

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