SPEAKER

To provide a speaker capable of highly accurately detecting a position of a voice coil.SOLUTION: A speaker comprises: a yoke for forming a magnetic circuit; a first magnet to be fixedly arranged; a voice coil arranged in a gap through which the magnetic flux of the magnetic circuit passes; a diaphragm connected to the voice coil so as to be oscillated together with the voice coil; a second magnet arranged in an oscillation part including the voice coil and the diaphragm; and a magnetic sensor arranged at a position through which magnetic fluxes of both of a first magnetic flux generated by the first magnet and a second magnetic flux generated by the second magnet pass. The direction of the first magnetic flux is different from the direction of the second magnetic flux.SELECTED DRAWING: Figure 2 【課題】ボイスコイルの位置を高精度で検出可能なスピーカを提供する。【解決手段】スピーカは、磁気回路を形成するヨークと、固定的に配置される第１磁石と、前記磁気回路の磁束が通過するギャップに配置されるボイスコイルと、前記ボイスコイルに接続され該ボイスコイルと共に振動する振動板と、前記ボイスコイルおよび前記振動板を含む振動部に設けられる第２磁石と、前記第１磁石が発生する第１磁束と前記第２磁石が発生する第２磁束の両方の磁束が通過する位置に設けられる磁気センサとを含む。前記第１磁束の向きと前記第２磁束の向きは異なっている。【選択図】図２