JPS57146483

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DESCRIPTION JPS57146483
BRIEF DESCRIPTION OF THE DRAWINGS The drawings are cross-sectional views of one
embodiment of the present invention. 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · voice coil, 6 · · · ......・ Acoustic lens.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker capable
of efficiently releasing heat generated by a voice coil to improve input resistance and improving
frequency characteristics. In general, the speaker generates heat when current flows through the
voice coil, and particularly when it is driven for a long time with a large current, the heat
becomes considerably high, and there is a problem that manpower is limited due to this heat. The
present invention provides a speaker that solves such conventional problems. An embodiment of
the present invention will be described below with reference to the drawings. 1) Setteranal 2 in
the drawing is 1 gun 1 o 41/1 l (9 / small J 2 nodes, 3 is a plate, 4 is a bobbin, 5 is a voice coil
wound on a bobbin, 6 is a diaphragm, 7 is an edge, 8 is an 8 The frame 9 is a damper, and the
above has the same configuration as the conventional speaker. Reference numeral 10 denotes a
support attached to the tip of the center pole 1, and 11 denotes an acoustic lens attached to the
tip of the support 10. The supporting tool 10 and the acoustic lens 11 are both made of a
supporting material having a thermal conductivity such as copper or aluminum, and the center
pole 1, the supporting tool 10, and the acoustic lens 11 are in thermal contact with each other.
Are combined. In this way, the heat generated in the voice coil 6 at the time of driving the
speaker is conducted to the acoustic lens 11 through the center pole 1 and the support 10, and is
dissipated from the acoustic less 11 to the atmosphere. To this end, since the acoustic lens 11 is
provided with a large number of plates, these act as heat dissipating fins, and the heat is
dissipated from the entire surface, so the heat power generated by the voice coil 6 Of course, it is
emitted efficiently>) t, the acoustic lens 11 performs the original function of the acoustic lens to
improve the frequency characteristic 04531 of the sound wave radiated. Although the acoustic
lens 11 is provided at the back of the diaphragm 6 in the embodiment, the support 10 may be
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extended if necessary, and the acoustic lens 11 may be disposed at the center or in front of the
diaphragm 6. As described above, according to the present invention, the acoustic lens is made of
a material having a good thermal conductivity and thermally coupled to the center pole.
Therefore, the heat generated by the voice coil is transmitted through the center pole and the
acoustic lens. It can dissipate heat efficiently. Therefore, it is possible to simultaneously improve
the input resistance of the speaker and the frequency characteristic.
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