| 摘要 |
PURPOSE:To facilitate the formation of coil end after inserting the coil and obtain an economical coil by shortening the length of the coil end, by forming a gradient of 6-20 deg. on the surface of coil side formation of a lower coil former in a rectangular coil bobbin. CONSTITUTION:An upper coil former 3a to form a side of the rectangular coil 7 is mounted on a mounting plate 18, the lower coil former 3b to form the opposed side of the rectangular coil is provided so as to adjust the interval between this upper coil former 3a resulting in the formation of a coil former 3. Then, the surface of coil formation 17 of the lower coil former 3b is allowed to have the gradient wherein the coil becomes wider as it is wound apart from the mounting plate 18 toward the end, and the angle theta of the gradient is set at 6- 20 deg.. A slide prevention member 28 may be provided also on the surface of coil formation 17. |
