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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the speaker of the
present invention. 5 · · · Frame, 5a · · · · · · · · · · · · · · · · · · cone paper, 9 · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · ······ Grooves.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a loudspeaker. In the prior art, there is a need to fix the entire periphery of the speaker with
nip whole caskerato. Since this gasket is pressure-bonded to the above-mentioned nip using an
adhesive, it is common that the bonding surface of the gasket is formed in a flat surface.
However, when the gasket formed as described above is crimped to the nip, excess adhesive
leaks to the outer surface of the nip, which causes extreme hardening of the outer peripheral
surface of the nip. When the cone vibrates, the downward movement gets worse on the nip itself,
and the inherent collusion causes the distortion characteristics of the speaker to decrease by 1 /
month and // 7. In order to improve the above-mentioned drawbacks, for example, a damping
agent is treated around the joint surface of the gasket and the nip to give mechanical loss to
prevent distortion of the speaker, but in this method, There is a problem in performance because
distortion of distortion characteristics newly occurs. The present invention has been made to
eliminate the above-mentioned drawbacks of the prior art, and the adhesive leaks out to the local
part outside the nip by forming an annular groove in the adhesive surface of the gasket to
accommodate the excess adhesive. To cause mechanical loss around the joint surface of the
gasket and the nip, which results from vibration of the cone paper from the joint of the nip and
the cone paper to the joint of the nip and the gasket. An object of the present invention is to
provide a speaker in which distortion noise of a speaker is prevented by suppressing natural
resonance. An embodiment of the present invention will be described below with reference to the
drawings. 1 is a speaker yoke, 2 is a center pole integrally projecting from the yoke 1, 3 is a
center cylinder ',..., A permanent magnet inserted in a 2-21-2, 4 is a plate . 5 is a frame fixed to
the plate 4; 6 is a voice coil supported by tehin 6a; 7 is a pobin 6ai + and has a spider for holding
a side swing; It is paper. The outer end of the cone paper 8 is supported by the nip 9, and the
collar JF ′ 9 extends to the outer peripheral portion 5 a of the frame 5. A gasket 10 fixes the nip
9 and the outer rim 5a of the 7th frame with an adhesive (not shown). The gasket 10 is made of,
for example, an annular body such as rubber, and forms an annular groove 11 in the bonding
surface of the gasket. 12はダストキャップである。 When the speaker of the present invention
thus constructed, the frame outer peripheral portion 5a and the nip 9 are pressure-bonded with
the gasket 10, the excess adhesive is accommodated in the groove 11 of the gasket 10.
Therefore, since the adhesive does not leak to the outer periphery of the nip as in the prior art
U), the nip 9 is not extremely hardened and the mechanical loss is not reduced. As described
above, according to the present invention, by providing a groove portion for containing an extra
adhesive on the adhesive surface of the gasket), mechanical loss is caused around the joint
surface of the gasket and the fastener. Therefore, the distortion characteristic of the speaker can
be greatly improved by suppressing the natural resonance due to the vibration of the cone paper,
and an excellent speaker free of distorted sound can be obtained.
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