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. 13, 2020
Filed:
May. 29, 2017
Nidec Copal Electronics Corporation, Tokyo, JP;
NIDEC COPAL ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
The present invention is a coreless coil characterized in that a plurality of α-winding coils are formed by a first coil layer and a second coil layer that has a same shape and a same width as the first coil, each coil layer having a center opening, being laminated together. Each outer peripheral portion in a connection direction of the plurality of α-winding coils has a connection stepped portion that is point-symmetric in relation to a center axis line of a Z-axis (the Z-axis being an axis that, in relation to an X-axis that is a center of both connected end portions of the α-winding coil and passes through a lamination boundary line of the first coil layer and the second coil layer, is a center of both unconnected end portions of the α-winding coil and passes through the lamination boundary surface such as to be orthogonal to the X-axis) of the respective center opening. The plurality of α-winding coils are connected in an annular shape in a state in which the connection stepped portions overlap each other and are attached to each other. An object of the present invention is to improve the bonding force of the plurality of α-winding coils.