VIBRATION SPEAKER

• Main Authors: FUJIWARA TETSUO, OKI KENICHI, OTSUKI TOMOKO
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2017
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS

PROBLEM TO BE SOLVED: To provide a vibration speaker capable of reproducing a wide-band sound.SOLUTION: In a magnetic circuit of which a magnetic circuit body 12 is formed in an almost doughnut-shape by an inner wall, a lower wall, an outer wall, and an upper wall, a magnetic gap 12a is formed. A voice coil 13 is arranged to the magnetic gap 12a. A treble actuator 30 comprising a laminate piezoelectric vibrator 31 in a cylindrical hole 18c of the inner wall of the magnetic circuit body 12 is arranged. An upper end of the treble actuator 30 is fixed to a vibration plate 14a. A lower end of the same is fixed to a holding member 34 supported by the vibration plate 14a. The treble actuator 30 is held between the vibration plate 14a and the holding member 34 so as to be pressure-welded. An input voltage signal is structured so as to drive the voice coil 13 and the laminate piezoelectric vibrator 31.SELECTED DRAWING: Figure 1 【課題】広帯域な音の再生ができる振動スピーカを提供する。【解決手段】磁気回路体１２が内壁、下壁、外壁、上壁により略ドーナツ状の磁気回路で、かつ、磁気ギャップ１２ａが形成された磁気回路を形成し、ボイスコイル１３は磁気ギャップ１２ａに配置され、磁気回路体１２内壁の筒孔１８ｃに積層圧電振動体３１を備えた高音アクチュエータ３０が配設され、高音アクチュエータ３０の上端が振動板１４ａに固定され、下端が振動板１４ａに支持された保持部材３４に固定され、振動板１４ａと保持部材３４との間で高音アクチュエータ３０が圧接されるように保持され、入力電圧信号がボイスコイル１３と積層圧電振動体３１とを駆動するように構成する。【選択図】図１