MAGNETIC CIRCUIT FOR SPEAKER UNIT, AND SPEAKER UNIT

摘要

A speaker unit has a diaphragm (2), a frame (3) that supports the diaphragm (2) with freedom to vibrate along the vibrating direction, and a drive section (4) that is provided on the frame (3) to give vibration to the diaphragm (2) through an sound signal. The drive section (4) includes a magnetic circuit (40) to form a magnetic gap (40G) along the direction different from the vibrating direction of the diaphragm (2), a voice coil support section (6) that has a voice coil (60) and vibrates along the magnetic gap (40G), and a vibration direction conversion section (7) to convert a direction of vibration of a voice coil support section (6) for transferring the direction-converted vibration to a diaphragm (2). On the magnetic circuit (40), a pair of magnetic gaps (40G, 40G) with different flux directions are formed in line along the vibrating direction of the voice coil support section (6), and the voice coil (60) supported by the voice coil support section (6) is disposed in a planar form to itinerate around the magnetic gaps (40G, 40G).