The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2021
Filed:
Mar. 02, 2018
Minebea Mitsumi Inc., Nagano, JP;
Suguru Okura, Fukuroi, JP;
Nobuyuki Sueyoshi, Kosai, JP;
Kazuo Muramatsu, Fukuroi, JP;
Shoji Yoshitomi, Fukuroi, JP;
Hiroaki Fujii, Iwata, JP;
MINEBEA MITSUMI INC., Nagano, JP;
Abstract
Noise caused by a gap between a rotor and a plate can be suppressed even when there are dimensional variations in members or assembly states. In a configuration of a stepping motor including front side and end side stator assemblies (), a rotor () provided with a rotor member () and a shaft () that are accommodated in the stator assemblies (), and a front plate () and an end plate () that are arranged on both sides of the stator assemblies () in an axial direction, and are configured to couple the stator assemblies (), a projection () in an annular shape is provided on a surface of the front plate () facing the rotor member () to protrude toward the rotor member (), a coil spring () that is interposed between the front plate () and the rotor member () is accommodated in the inner side of the projection (), and the rotor () is urged toward the end plate () by the coil spring to be elastically pressed against the end plate ().