| 摘要 |
PURPOSE:To facilitate a control operation by forming integrally a winding terminal and a bobbin connecting terminal in each of air-core coil bobbins and adhering the terminals with flanges of the bobbins applied to each other. CONSTITUTION:Two bobbins 1 wound with coils 3 are stacked, and respective winding terminals 2 and 2 and respective bobbin connecting terminals 5 and 5 of the first and second bobbins are soldered respectively to each other. The terminals 2 and 5 of the second bobbin are connected in short circuit. In an air-core coil bobbin constituted in this way, inductance can be easily increased or decreased for modification of the circuit by modifying the connection between the terminals 2 and 5 without removing the bobbin from a printed-circuit board. Further, the bobbin, if provided with a control core, can be easily controlled finely. |
