公开(公告)号：US20220376594A1

公开(公告)日：2022-11-24

申请号：US17817154

申请日：2022-08-03

Applicant: MINEBEA MITSUMI Inc.

Inventor： Minoru KURODA

IPC: H02K23/04 ,  H02K1/17

Abstract: A small DC motor includes a motor frame having a cylindrical portion, the cylindrical portion having a constant thickness and having a cross section in a shape that comprises four sides and connecting portions, each of the connecting portions connecting adjacent two of the four sides and being located inward from a corresponding corner in a quadrangle comprising the four sides; and a magnet having a circumferential surface on an inside thereof and having conformable contact with the motor frame on an outside thereof.

公开(公告)号：US20220077741A1

公开(公告)日：2022-03-10

申请号：US17455679

申请日：2021-11-19

Applicant: MINEBEA MITSUMI Inc.

Inventor： Hiroaki MOCHIZUKI ,  Minoru KURODA

IPC: H02K5/16 ,  H02K5/167 ,  H02K7/08

Abstract: An inner-rotor motor including: an armature assembly including a rotating shaft, an armature unit coupled to the rotating shaft and a pressing unit; a frame assembly including a frame housing the armature unit, a first bearing unit located on one side with respect to the armature unit in an axial direction, and a second bearing unit located on another side with respect to the armature unit in the axial direction; and an urging structure that urges the rotating shaft in a direction away from the second bearing unit and that presses the pressing unit toward the first bearing unit.

公开(公告)号：US20180069458A1

公开(公告)日：2018-03-08

申请号：US15693881

申请日：2017-09-01

Applicant: Minebea Mitsumi Inc.

Inventor： Koichiro HIRABAYASHI ,  Akiko IKUTA ,  Yukimasa MATSUMURA ,  Kazuaki SATO ,  Minoru KURODA ,  Bora IN

IPC: H02K13/10 ,  H02K5/24 ,  H01R39/38

CPC classification number: H02K13/10 ,  H01R39/381 ,  H01R2201/10 ,  H02K5/145 ,  H02K5/24

Abstract: A motor includes a commutator, a bracket including a conductive brush, first and second wall parts, and first and second deformable parts. The conductive brush is in contact with the commutator. The first wall part includes a first surface extending along a first surface of the conductive brush. The second wall part includes a second surface extending along a second surface of the conductive brush located on a side opposite the first surface of the conductive brush. The first deformable part is in contact with both the first surface of the conductive brush and the first surface of the first wall part, and is deformable in response to movement of the conductive brush. The second deformable part is in contact with both the second surface of the conductive brush and the second surface of the second wall part, and is deformable in response to movement of the conductive brush.

公开(公告)号：US20220278598A1

公开(公告)日：2022-09-01

申请号：US17651963

申请日：2022-02-22

Applicant: MINEBEA MITSUMI Inc.

Inventor： Hirofumi OHBA ,  Minoru KURODA ,  Hiroshi MIYAZAKO

IPC: H02K23/40 ,  H02K1/2706 ,  H02K1/24

Abstract: A motor 1 includes a shaft 2, a rotating body 6 fixed to the shaft 2, a first magnetic body 3 fixed to the shaft 2 and a stationary part including a second magnetic body 4, wherein one of the first magnetic body 3 and the second magnetic body 4 includes a magnet, and the first magnetic body 3 opposes the second magnetic body 4 over an entire circumference.

公开(公告)号：US20190280541A1

公开(公告)日：2019-09-12

申请号：US16292759

申请日：2019-03-05

Applicant: MINEBEA MITSUMI Inc.

Inventor： Minoru KURODA

IPC: H02K1/28 ,  H02K5/15

Abstract: A motor includes a rotary shaft, an armature part, a frame including a tubular portion surrounding the armature part, and a plurality of magnets. The tubular portion is formed of a magnetic body. The tubular portion includes a plurality of flat parts and a plurality of curved parts. Each of the plurality of flat parts and each of the plurality of curved parts being alternately arranged in a peripheral direction. On an inner surface of the tubular portion in each of the plurality of curved parts, a plurality of magnetic poles are provided. A magnetic gap is provided in a radial direction, the magnetic gap being formed by the inner surface of the tubular portion in each of the plurality of flat parts and the armature part.