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DESCRIPTION JPS57178792

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DESCRIPTION JPS57178792
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an
embodiment of the present invention, and FIG. 2 is a front view of the spider. 4 · · · Plate of
magnetic circuit, 7 · · · voice coil, 8 · · · spider, 9 · · · elastic support.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a loudspeaker supporting a voice coil with a spider. Conventionally, with this loudspeaker, the
lowest resonance frequency is lowered to increase the bass range, and the compliance of the
spider is increased. However, such a spider is a voice coil of a large-pitch bass region with a large
input. She is not supportive and she is a spider. There is a drawback that the voice coil vibrates
together and contacts the magnetic circuit to generate an abnormal sound. このため。 1)
Compliance) by remembering hard l spider) (1) 53 / but 47_々_G one to reduce that is being
performed, and the method such as, generating a new via unique sound was 撞There is a
drawback to The present invention seeks to eliminate the above disadvantages of the prior art.
The present invention, therefore, elastically supports the spider by interposing a plurality of
elastic bodies having sound absorbing characteristics at equal intervals between the inner
peripheral portion of the spider and the plate of the magnetic circuit. 1 and 2 show an
embodiment of the present invention. Overall longitudinal sectional view, front view of spider, ill,
(2). t3 + and f41 indicate the yoke, center ball, permanent magnet and plate of the magnetic
circuit, and + 5i indicates the frame. (6) is a cone-shaped diaphragm, ff1Fi voice coil, (8) spider,
f91 ij spider at equal intervals on the inner periphery is a tiger, an elastic support with sound
absorption characteristics, aI is an edge, (IIH dust cap is there. In the above embodiment, an
elastic body (9) having a sound absorbing property is interposed between the spider (the inner
periphery of the 81 and the plate (4) of the magnetic circuit), and these elastic bodies (9) 54)
Since it supports 54, the spider (81, the voice coil f711-1 supported to it, the main vibration at
the time of the large amplitude of the bass region by the large input, the excessive vibration
contacts the magnetic circuit. It can not generate an abnormal sound. It goes without saying that
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the elastic support of the present invention may be provided on the plate of the magnetic circuit
or may be held between the spider and the plate of the magnetic circuit. As described above,
according to the uninventioned VC, it is possible to obtain a speaker capable of sweeping all over
the low frequency range of one frequency characteristic while suppressing the excessive
vibration due to the spider when the large amplitude of the low frequency range due to the large
input.
12-04-2019
2
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