| 摘要 |
<p>A speaker device is provided with a slender diaphragm and a magnetic circuit. The device has comparatively large magnetic flux density near an end part of a longitudinal direction of the magnetic circuit, and outputs a sound wave of high sound quality and high sound pressure. The magnetic circuit has a comparatively narrow magnetic gap. The speaker device can easily and highly precisely be manufactured. The speaker device (1) is provided with the diaphragm (33) where a planar shape orthogonal to a vibration transmitting direction of a vibration generation source has the longitudinal direction and a short direction, a voice coil (31) which is bonded to the diaphragm (33) and has a straight part in which the planar shape is formed in a circle and which follows the longitudinal direction, the magnetic circuit (2) and a frame (4). The magnetic circuit (2) has a yoke (21), a magnet (22) and a plate (23). The voice coil (31) is arranged in the magnetic gap (MG1) of the magnetic circuit (2) and extends to an outer side of the longitudinal direction compared to the end part in the longitudinal direction of a base part (211) of the yoke (21). The plate (23) has a projection (231) projected to the outer side of the longitudinal direction compared to the end part of the longitudinal direction of the base part (211) of the yoke (21).</p> |
