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JPS57157700

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DESCRIPTION JPS57157700
Description 1, title of the invention
Speaker vibration member
3. Detailed Description of the Invention The present invention relates to an improvement in the
configuration of a cone portion for radiating sound in an electrodynamic speaker and a bobbin
portion for mounting a voice coil. FIG. 1 is a screen view of a conventional electrodynamic
speaker, and FIG. 2 is a partially enlarged view of FIG. 1 is a permanent magnet, 2a is a sensor
pole, 2b is a yoke, 2C is a yoke plate, and the permanent magnet 1, the set / terpole 2a1 yoke 2b
and the yoke plate 2c constitute a magnetic circuit 6. 4 is a diaphragm also referred to as a cone
because its shape is conical, 5 is a damper, 6 is a dust plate attached to the central upper surface
of the diaphragm 4, 7 is a gasket, 8 is a magnetic circuit A frame that is joined and joins the edge
4a of the diaphragm 4 together with the gasket 7 at the peripheral portion 8a, 9 is a voice coil
made of a metal wire such as copper, 10 is a bobbin, and the voice coil 9 is wound around the
bobbin 10 The intermediate portion of the bobbin 10 is held by the damper 5, and the voice coil
9 is fitted into the gap 6a of the magnetic circuit without bias. 11 is an adhesive for coupling the
diaphragm 4 most important as a vibration system of the speaker and the bobbin 710 to which
the voice coil 9 is attached, and is an adhesive at the center of the diaphragm 4 bent along the
circumferential surface of the bobbin 100 The diaphragm 4 and the bobbin 10 are coupled with
each other by being interposed between the bending portion 4b and the bobbin 1D. When
bonding the diaphragm 4 and the bobbin 16 described above, generally, the adhesive 11 is
applied in advance to the upper part of the bobbin 10, and the bobbin 10 is inserted into the
incorporated diaphragm 4 and fixed and adhered. . However, since the adhesive 11 is applied in
advance to the upper part of the bobbin 10, a film of the adhesive 11 is formed on the upper part
of the bobbin 10 after a while, such as when using a quick-drying adhesive, EndPage: 1. The
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attachment of the diaphragm 4 can not be completely performed, so that the connection failure
between the both occurs, and it takes time for the operation. Further, by applying the adhesive
11 to the bobbin 1o in advance, the adhesive 11 flows downward and adheres to the damper 5
and the voice coil 9, which may cause deterioration of the characteristics as a speaker, and
vibration Since the distance between the bent portion 4b of the plate 4 and the bobbin 10 was
small, the adhesive 11 did not penetrate sufficiently and was raised on the diaphragm 4 to
deteriorate the appearance and adhesion. Furthermore, when the voice coil 9 is fitted into the
gear knob 6a of the magnetic circuit rod, the voice coil 9 may be fitted eccentrically because the
bending portion 4b of the diaphragm 4 and the bobbin 10 are bonded and coupled. However, it
was also the cause of abnormal noise generation due to rubbing against the wall of the gap 6a.
The present invention integrates the diaphragm 4 and the bobbin 10 in order to eliminate the
above-mentioned drawbacks, and FIG. 3 is a side view of an electrodynamic speaker showing one
embodiment of the present invention. 4 is a partially enlarged view of FIG. 3; Reference numeral
14 denotes a speaker vibrating member configured of an edge 14a, a bobbin portion 14b for
attaching a voice coil, and a cone portion 14c for radiating sound directly into the air, and is a
single synthetic resin, for example, An edge 14a, a bobbin m 14b, and a cone portion 14c are
integrally formed of an aromatic polyester-based polyarylate film or the like, and a voice coil 9 is
wound and mounted on the bobbin portion 14b. In the gap 6a of. That is, without the adhesive
11 as used in the electrodynamic speaker of FIG. 1, the speaker vibrating member 14 can couple
the moving plate 4 and the bobbin 1o shown in FIG. The reference numerals of FIG. 1 and the
common numbers indicate common members, and the description thereof will be omitted. FIG. 5
is a side view of an electrodynamic speaker showing another embodiment of the present
invention, and FIG. 6 is a partially enlarged view of FIG. 5, showing a cone portion 14C and a
bobbin portion 14b of FIG. An embodiment in which the voice coil 19 is further integrally formed
by the membrane technology is shown on the bobbin portion 14b of the speaker vibrating
member 14 integrally formed. Here, the method of forming the voice coil 19 by film technology
means forming a film by vapor deposition or chemical plating, forming the voice coil 19 by
etching, or forming the voice coil 19 by mask vapor deposition or mask plating. It is good. FIG. 7
is a 1li 11 plan view of an electrodynamic thin speaker showing still another embodiment of the
present invention, and FIG. 8 is a partial enlarged view of FIG. The example applied to the shape
speaker is shown. That is, the speaker vibrating member 24 is constituted by a cone m24c of
Tame that radiates direct sound into the air, a bobbin portion 24b for mounting a voice coil, and
an edge 24a, and the edge 24a and bobbin are made of one synthetic resin. The portion 24b and
the cone portion 24G are integrally formed, and further, the voice coil 29 is integrally formed on
the bobbin portion 24b by the membrane technology. A permanent magnet 21 and yokes 22a
and 22b constitute a magnetic circuit 26 by the permanent magnet 21 and the yokes 22a and
22b. A V-frame 28 is fixed to the outer peripheral portion of the yoke 22b of the magnetic circuit
26 so as to be substantially flush with the yoke 22a, and the outer peripheral portion 24d of the
speaker vibrating member 24 is fixed and supported by the peripheral portion 28a of the
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hammer 28. It has a structure.
As described above, according to the present invention, the cone portion for radiating the sound
directly into the air and the bobbin portion for mounting the voice coil are integrally formed of a
single sheet of synthetic resin. Bonding of parts is not necessary, and connection failure between
the two can be prevented. Also, since no adhesive is used for bonding the two, no adhesive
adheres to the damper or voice coil, so that deterioration of the characteristics of the speaker can
be prevented, and the appearance is also improved. EndPage: 2 in which the cone part and the
bobbin part are integrally formed on Sarah, the positioning of the bobbin part with respect to the
cone part can be easily and accurately displayed, and it is also useful for voice coil ?) gear knob
rubbing force prevention Furthermore, bonding work is eliminated, and the production time of
the speaker can be significantly shortened. In addition, the cone part and the bobbin part can be
configured as an integral part, the number of parts is reduced, and the manufacturing cost can be
reduced to 1-. Become. In each of the embodiments of the present invention, the edge is also
formed integrally with the speaker vibrating member, but of course it may be formed separately.
4 is a side view of a conventional electrodynamic speaker, FIG. 2 is a partial enlarged view of FIG.
1, and FIG. 3 is a side view of an electrodynamic speaker showing an embodiment of the present
invention Fig. 4 is a partial enlarged view of Fig. 3, Fig. 5 is a side view of an electrodynamic
speaker showing another embodiment of the present invention, Fig. 6 is a partial enlarged view
of Fig. 5, Fig. 7 FIG. 8 is a side elevational view of a dynamic thin-plate speaker '?' showing
another embodiment of the present invention, and FIG. 8 is a partially enlarged view of FIG.
14.24 и Vibrating member 14b for a speaker, 24b ииииии Bobbin portion 14c, 24c и и и и Cone type
9.19. 2A Fig. 3 Fig. 4 EndPage: 3 5 I! 1 Fig. 6 Fig. 7 Fig. 8 EndPage: ?
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