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The present invention relates to a speaker excellent in assemblability. Generally, the speaker is
constructed by welding, strangling or bonding the frame after assembling the magnetic circuit
using a centering jig. In addition, as a small speaker using a high energy magnet such as a rare
earth magnet recently developed, FIG. 1 shows an example of 0 which was constructed using a
wedge-shaped yoke in a magnetic circuit. The magnet 3 of the same outer diameter and the
upper plate 4 are incorporated into the frame 1f made of synthetic resin and the upper outer
peripheral surface of the wedge-shaped yoke 2 by using the center alignment jig 5 and bonded
by an adhesive. It was In addition, in the case where the outer diameters of the magnet 3 and the
upper plate 4 are different, first, as shown in FIG. 2, the magnet 3 is positioned within the wedgeshaped yoke 2 by the center alignment jig 5 & for the magnet and adhesively bonded. As shown
in FIG. 3, the upper plate 4 is positioned on the magnet 3 by the upper plate center alignment jig
6b and adhesively bonded. As described above, in the conventional speaker, the center alignment
jig 5 is always required for the assembly, and after the adhesive is dried and cured, the center
alignment jig 5 is removed and the process of moving to the next assembly process is necessary.
And the productivity was poor. The present invention eliminates the above-mentioned
conventional drawbacks, and the height 3.8. It is intended to provide a loudspeaker that can be
assembled to an accuracy. That is, according to the present invention, a frame having a
cylindrical portion on the outer periphery of a plate having a center pole is formed of a synthetic
resin, and a magnet and an upper plate can be positioned and assembled using the cylindrical
portion as a guide. It is an attempt to measure the improvement of the workability in the
assembly by making it unnecessary. An embodiment of the present invention will be described
below with reference to FIGS. 4 and 5. 6 is a plate having a center pole 7 at the center of the
upper surface, and a frame 9 is integrally formed of synthetic resin on a circumferential surface
of the plate 6 via a cylindrical portion 8 raised upward, and the cylindrical portion An opening 1
o is formed at 8 and the frame 9 t ? joint. Further, the inner surface of the cylindrical portion 8
is formed so as to have a diameter slightly larger than the outer diameter of the plate 6 and be a
highly accurate vertical surface. A ring-shaped upper plate 12 is incorporated in the cylindrical
portion 8 in the same manner as the ring-shaped magnet 11. The outer diameters of the magnet
11 and the upper plate 12 are equal, and the inner diameter of the cylindrical portion 8 is equal
in size.
The upper plate 12 is incorporated with the inner surface of the cylindrical portion 8 as a guide,
and is connected to the plate 6 by an adhesive. The periphery of the diaphragm 140 is bonded to
the periphery of the frame 9 together with the gas kent 13 by bonding or the like. The voice coil
15 is coupled to the central portion of the diaphragm 14, and the voice coil 16 is the center pole
7 'j! c plate 6, magnet 11. It is embedded in the magnetic gap 17 of the magnetic circuit 16
composed of the upper plate 12. As described above, since the speaker of the present invention
is configured, the magnet and the upper plate can be incorporated by using the cylindrical
portion integrally formed with the frame on the outer peripheral portion of the plate as a guide.
There is no need to cure the magnet and adhesive for bonding to the upper plate in a short time
by heating, curing by natural drying is also possible, its assembly accuracy is high, and the frame
including the cylindrical portion has a magnetic circuit, In particular, it is an industrial value dog
that has advantages such as the protection of the magnet and the advantage of safety.
Brief description of the drawings
FIG. 1 is a cross-sectional view of one assembling process of the conventional speaker, FIGS. 2
and 3 are cross-sectional views of another conventional speaker assembling process, and FIG. 4 is
a cross-sectional view showing one embodiment of the speaker of the present invention FIG. 5 is
an exploded sectional view of the same.
6 и и и и и и и и и и и и и и и и и и и и и plate и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и иииииии Upper plate, 14 и и и и и и и и и и и и и и и и и и и и и и и и voice coil, 16 и и и
magnetic circuit, 17 и и и и и и и и и и и и Name of Agent Attorney Nakao Toshio Other 1-1 @ 82 Figure
Ja 3 Figure
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description, jps5827500
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