| 摘要 |
PROBLEM TO BE SOLVED: To provide a small coil having an excellent heat dissipating characteristic, by forming a coil wire in a flat rectangular strip shape having a width substantially same as the interval between both flange parts, and by winding the winding barrel part by piling the coil wire in the thickness direction. SOLUTION: A primary coil wire 50 is an enamelled wire, which has a strip- shaped copper wire surface coated with enamel paint with a rectangular cross- section and is formed in a flat rectangular shape with a width size substantially same as an interval size H between the both flange parts 34a and 34b. The coil wire 50 is wound approximately 80 times between the pair of flange parts 34a and 34b on a primary winding barrel part, so as to pile it in the thickness direction, and a primary side wound part 36 is formed. The flange part 34a of the both flange parts 34a and 34b is formed along the diameter direction from the winding core, and is formed in a shape which exposes the upper plane of the primary side wound part 36 from between the extended parts of the flange part 34a. Thus, the coil is made small and excellent heat dissipation can be obtained. |
