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Patent Office Secretary's Title 3, Patent Applicant 5, List of Appendices Specifications ■ Japan
Patent Office ■ JP-A-52-633200 Published Japanese Patent Application 52. (1977) Request for
examination of 5.25 examination not yet filed (all three pages) Office internal reference number
ill 11 11 1 1, therefore this invention is the name of the invention 鑑 み name of invention ス ピ
ー カ name of invention speaker 2 The outer peripheral end of the diaphragm is adhesively held
on the frame by a predetermined amount of damping material having visco-elasticity, and the
predetermined amount of braking material performs damping of vibration at the outer peripheral
end of the diaphragm. A speaker characterized by having been made to K.
Detailed Description of the Invention The present invention relates to the improvement of a
speaker. In the past, attempts have been made to improve the sound quality by increasing the
efficiency of the system power and reducing the QM (peak sharpness of the impedance peak) of
the lowest resonance frequency. In order to achieve high efficiency, it is better to lighten the
effective mass of the diaphragm including the edge. In the case of lightening the paper, the
problem of insufficient rigidity and the allowable input The weight reduction of the edge leads to
abnormal resonance and a reduction in braking effect, making it difficult to reduce the QM. It is
an object of the present invention to provide a speaker that achieves price reduction by
simplifying the manufacturing process while aiming to improve both the sound quality and the
sound quality. Hereinafter, an embodiment of the present invention will be described in detail
with reference to the drawings. In FIG. 1, the outer peripheral end of the cone paper 11
constituting the diaphragm is corrugated and integrally molded as a tongue (support) 12. The
edge 12 has a function to damp the vibration of the outer peripheral end of the cone paper 11.
The tip of the edge 12 is inserted into a damping member 13 bonded to the frame 21 and held
by the damping member 15 as if it were in a sandwich form. The other structure is the same as
that of a normal speaker, that is, 22 is a magnet, 23 is a ball, 24 is a sun, 25 is a guide ring, 26 is
a voice coil, 27 is a damper, 28 is a cap, 29 is a lead It is a silk thread line that makes In the case
of a small diameter, small amplitude speaker, EndPage: 1, as shown in FIG. 2, is held by directly
inserting the outer peripheral end of the cone paper 11 into the damping material 15 without
providing the edge 12. In order to assist the braking effect of the cone paper 11 of FIG. 2 further,
as shown in FIG. 3, the support 14 is disposed on the back side of the paper 11 and the braking
material 13 and the support 14 The outer peripheral end of the cone paper 11 may be supported
and braked. In order to manufacture each of the above-mentioned speakers, after placing the
cone paper 11 and the edge 12 or the support 14 at a predetermined position with respect to the
frame 21, the melted damping material made of bis colloid, latex, vinyl acetate or the like is used.
By applying a gap between the paper 11 and the edge 12 and filling a predetermined amount 0
in this way, the molten damping material gradually solidifies, and the inner peripheral surface of
the frame 21 and the end of the cone paper 11 are gradually solidified. The damping material 13
adheres to the surface or the end surface of the edge 12 or the support 14 and holds in this way
0 Furthermore, the damping material 13 has a visco-elasticity even after being solidified, so that
a certain amount of damping material 5) create a braking effect.
The material g 'of the braking material 13! It is possible to control the amount of damping by
adjusting the visco-elasticity and adjusting the amount of filling by adjusting the zero. As
apparent from the above description, according to the present invention, according to the
present invention, a very simple manufacturing process The holding and braking with respect to
the frame 21 at the outer peripheral edge of the scion paper can be performed, which can
contribute to extremely low cost. Furthermore, since the braking is performed without increasing
the equivalent mass of the diaphragm, the efficiency can be improved and the QMo can be
reduced. Since the diaphragm is held and braked by the damping material, the effective vibration
area of the diaphragm is increased, which can contribute to the improvement of the efficiency.
4. Brief Description of the Drawings FIG. 1 is a cross-sectional view showing an embodiment of
the present invention, and FIGS. 2 and 3 are partial enlarged views showing modified examples,
respectively. ... edge 13 ..... braking material 14 ..... support (4) 21 ..... frame 22 ..... magnet 23 · ■
- · ball 24 ... fist York 25 ······ Guide ring 26 · Φ · · · · Voice coil 27 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · voice coil 27 · · · · · · · · · · · · · · · · · Other than inventor's name M8 Taikei 165EndPage:3