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Speakers and AV equipment
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A speaker and sound wave technology, applied in sensors, hearing aids, earpiece/headphone accessories, etc., can solve the problems of reducing rigidity, lowering the lowest resonant frequency of speakers, and achieving the effect of flat frequency characteristics
Active Publication Date: 2019-05-28
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Problems solved by technology
Thus, even if the speaker is miniaturized, the rigidity can be reduced by adjusting the width or thickness of the suspensions 24a and 24b, and the lowest resonance frequency of the speaker can be lowered.
Method used
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Embodiment approach 1
[0061] Figure 1A It is a sectional view of the speaker 100 of this embodiment. Figure 1B yes Figure 1A 1B-1B sectional view of speaker 100 . Speaker 100 includes yoke 101 , magnet 102 , flat plate 103 , diaphragm 104 , suspensions 105 a and 105 b , voice coil 106 , acoustic tubes 108 a , 108 b , and 108 c , stopper 109 , and magnetic fluid 110 .
[0062] Furthermore, a magnetic circuit forming a magnetic gap 107 is constituted by the yoke 101 , the magnet 102 , and the flat plate 103 . A rear volume 111 (a space on the magnetic circuit side of the diaphragm 104 ) is formed by the flat plate 103 , the diaphragm 104 , the voice coil 106 , and the magnetic fluid 110 .
[0063] In addition, the sound guide tubes 108 a , 108 b , and 108 c are spaces that respectively connect the space on the magnetic circuit side of the diaphragm 104 with the space outside the speaker 100 .
[0064] In addition, the voice coil 106 and the magnetic fluid 110 are arranged in the magnetic gap 1...
Embodiment approach 2
[0134] The speaker 300 according to Embodiment 2 will be described below. In addition, in this embodiment, a part of description of the same structure as that of Embodiment 1 is omitted.
[0135] Figure 9A It is a sectional view showing an example of the speaker according to the present embodiment of the present invention. Figure 9B It is a cross-sectional view showing an example of a speaker according to an embodiment of the present invention, specifically, Figure 9A 9B-9B sectional view of the loudspeaker.
[0136] The speaker 300 includes a yoke 301 , a magnet 302 , a flat plate 303 , a diaphragm 304 , suspensions 305 a and 305 b , a voice coil 306 , a sound pipe 308 , a stopper 309 , and a magnetic fluid 310 . In addition, magnetic gap 307 is formed by yoke 301 , magnet 302 and flat plate 303 , and back volume 311 is formed by flat plate 303 , vibration plate 304 , voice coil 306 and magnetic fluid 310 . The voice coil 306 and the magnetic fluid 310 are arranged in ...
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Abstract
A speaker includes a diaphragm and a magnetic circuit, a plurality of acoustic paths that provide connection between a space formed on a side including the magnetic circuit with respect to the diaphragm and a space exterior to the speaker are formed in the magnetic circuit, and the plurality of acoustic paths include a first acoustic path and a second acoustic path that differs in acoustic impedance from the first acoustic path.
Description
technical field [0001] The invention relates to a loudspeaker and AV (Audio Visual) equipment (audio-visual equipment). Background technique [0002] In recent years, a wide-band speaker (hereinafter, referred to as a magnetic fluid speaker) capable of reproducing bass even in a small size has been realized by using a divided suspension and a magnetic fluid (magnetic fluid). [0003] Figure 10A It is a figure which shows the cross-sectional view of the speaker 400 using a magnetic fluid and a divided suspension in the conventional speaker described in patent document 1, Figure 10B yes Figure 10A 10B-10B sectional view of the loudspeaker. Figure 10A , Figure 10B The illustrated speaker includes a yoke 20 , a magnet 21 , a flat plate 22 , a diaphragm 30 , suspensions 24 a and 24 b , a voice coil 26 , a sound guide tube (sound conduit) H2 , a rib L1 , and a magnetic fluid 27 . [0004] According to the above structure, the suspensions 24a and 24b which support the vibrat...
Claims
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