Patent ID: 9721714
Date: 2017-08-01
CPC Classifications: H01F,H05K

Claim:
1. An electromagnet, comprising: an ring-shaped core; and a flexible circuit board, comprising: wherein the number of the conductive lines formed on each one of the carrying segments is several, wherein the two opposite end portions of each one of the carrying segments include a first end portion and an opposite second end portion, the first end portions and the second end portions of the substrate are arranged in two rows, and each one of the carrying segments is bendable to overlap the first end portion onto the second end portion thereof; each conductive line is arranged from the first end portion to the second end portion of the corresponding carrying segment, and the connecting line is arranged from the first end portion of one of the two carrying segments to the second end portion or the first end portion of the other carrying segment through the connecting segment, wherein each one of the conductive lines includes a first welding pad and a second welding pad arranged at two opposite ends thereof, the first welding pad and the second welding pad of each one of the conductive lines are respectively formed on the first end portion and the second end portion of the corresponding carrying segment; wherein each one of the conductive lines defines a virtual line passing through the first welding pad and the second welding pad thereof, and each virtual line and a longitudinal direction of the corresponding carrying segment have an acute angle, wherein the two carrying segments and the connecting segment are formed in an H shape, wherein the two opposite end portions of each carrying segment are connected to each other to construct a tubular structure, and two opposite ends of the connecting line are respectively connected to two adjacent conductive lines respectively formed on the two tubular structures, so the conductive lines and the connecting line are in a series connection to construct a coil; wherein the tubular structures are sleeved at the core, and the coil is wound around the core, wherein the coil is configured to receive a current for making the core to have magnetism.