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AssigneePanasonic Corporation
InventorsMasahide Sumiyama, Satoshi Koura, Yoshimichi Kajihara, Koji Sano, Kazuki Honda, Satoshi Itoh, Shuji Saiki, Toshiyuki Matsumura, Shinya Mizone
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According to the present invention, there is provided a speaker for use in audio/video apparatuses and a small-sized speaker device capable of realizing preferable reproduction a bass sounds. In order to attain this, in the present invention, a pressure adjusting body is coupled to a portion of a magnetic circuit or a frame, which is a component of a speaker unit, to constitute the speaker unit. The speaker unit is mounted to a small-sized cabinet to constitute a speaker device, which enables realization of preferable reproduction of bass sounds.
A speaker comprising a magnetic circuit, a frame coupled to the magnetic circuit a vibration plate coupled to an outer peripheral portion of the frame, a voice coil which is coupled to the vibration plate and is partially placed in a magnetic gap in the magnetic circuit, and a pressure adjusting body coupled to the magnetic circuit, wherein the pressure adjusting body contains activated carbon and is not disposed between the magnetic circuit and the vibration plate.
Dependencies are inferred from the claim text.