| 摘要 |
PURPOSE:To realize change of coil inductance and coupling degree between coils by providing a bobbin with collor consisting of elastic material having a coil wound, a terminal plate having a pole which is inserted into the bobbin and a screwing plate screwed into the upper part of the suporting rod of terminal plate. CONSTITUTION:The coils 4a-4c are wound on a bobbin 2 having a collar consisting of elastic material and the bobbin 2 is loaded to a supporting rod 3a of terminal plate 3. Moreover, a screwing plate 1 is screwed into the upper screwing part 3b of the supporting rod 3a of the terminal plate 3 and the bobbin 2 is fixed to the terminal plate 3. When the screwing plate 1 is screwed, the collar of bobbin 2 provided between the coils 4a-4b is compressed, interval between the coils 4a-4c becomes small and coupling between respective coils is strengthen and an inductance of coil formed by the 4a, 4b becomes large. In the same way, coupling with the coil formed by coils 4a-4c is also enhanced. On the contrary, when the screwing plate 1 is loosened, the bobbin 2 is relieved of compression and expands, making thick the collor provided between the coils 4a-4c.
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