MUMBAI, India, Sept. 12 -- Intellectual Property India has published a patent application (202517074720 A) filed by Citizen Micro Co. Ltd; and Citizen Watch Co. Ltd., Hidaka, Japan, on Aug. 6, for 'coreless motor.'
Inventor(s) include Igarashi Satoshi; Yanagisawa Akira; and Yokochi Masato.
The application for the patent was published on Sept. 12, under issue no. 37/2025.
According to the abstract released by the Intellectual Property India: "In order to improve motor characteristics, this coreless motor (100) is provided with: a rotary shaft (20); a coil (60) which is formed in a cylindrical shape by winding a conductor (61) and rotates integrally with the rotary shaft (20); and a cylindrical magnet (30) which is disposed inside the cylindrical shape of the coil (60). One winding of the coil (60) is formed in a hexagonal shape having parallel sections (62) which are parallel to an axial direction (center C direction) of the rotary shaft (20) and two oblique side portions (63, 64) which are inclined with respect to a surface orthogonal to the center C direction and connected to both ends of the parallel sections (62), wherein the oblique side portions (63, 64) are formed in a curved shape protruding from the inner side toward the outer side of the one winding of the coil (60), and a tangential angle (?) between a tangential line of the oblique side portion (63) drawn from a vertex where two adjoining oblique side portions (63, 63) in the one winding of the coil (60) are connected together at one end and a surface orthogonal to the rotary shaft (20) is set in a range of 15 [degrees] to 50 [degrees]."
The patent application was internationally filed on Mar. 28, 2023, under International application No.PCT/JP2023/012646.
Disclaimer: Curated by HT Syndication.
