VOICE COIL AND ITS MANUFACTURING METHOD, AND LOUDSPEAKER USING VOICE COIL

摘要

PROBLEM TO BE SOLVED: To provide an excellent voice coil that realizes a miniaturized loudspeaker provided with a bobbin and a coil standing large inputs and prevents a sound pressure level from dropping, and a loudspeaker using the voice coil. SOLUTION: The loudspeaker is provided with a voice coil constituted of the bobbin 29 and the coil 30 disposed inside the bobbin 29. The voice coil has the bobbin to stand large inputs and is provided with the coil inside the bobbin to secure a diaphragm of the same size and make the largest external shape including the voice coil small, thereby making the loudspeaker small and lightweight. COPYRIGHT: (C)2004,JPO