公开(公告)号：US10069391B2

公开(公告)日：2018-09-04

申请号：US14812472

申请日：2015-07-29

Applicant: MINEBEA MITSUMI INC.

Inventor： Minoru Kuroda

IPC: H02K1/17 ,  H02K23/04

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：US11444523B2

公开(公告)日：2022-09-13

申请号：US16118083

申请日：2018-08-30

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.