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JPS6170900

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DESCRIPTION JPS6170900
[0001]
FIELD OF THE INVENTION The present invention relates to a flat loudspeaker unit. The structure
of the prior art and the problems thereof FIG. In FIG. 1, 1 is a diaphragm, 2 is an edge, 3 is a
coupling cone, 4 is a voice coil, 5 is a damper, 6 is a frame, 7 is a plate, 8 is a magnetic gap of a
magnetic circuit (hereinafter referred to as 8). It is called a gap). In the flat panel speaker, the
voice coil 4 is held by the damper 5 in the gap 9 between the plate 7 and the center pole 8, and
the driving force is used to drive the diaphragm 1 through the coupling cone 3. When
assembling the flat speaker unit having the above configuration, a spacer (not shown) is inserted
between the center pole 8 and the voice coil 4 in the gap 9 to prevent the voice coil 8 from being
eccentric. Bonding of the coupling cone 3, the damper 6 and the voice coil 4 is performed in
preparation and work. After adhering to the edge 2, the diaphragm 1 adheres to the coupling
core 73 with the spacer in the gap 9 removed. At this time, if eccentricity of the voice coil 8
occurs, a problem of gap rubbing occurs. For this reason, there is a method of expanding the
horizontal portion of the coupling cone 3 and connecting with the edge 2. However, generation
of abnormal noise due to incomplete bonding, weight increase in expansion of the horizontal
portion of the adhesive and the coupling cord 73 Had the problem of causing a decrease in
sound pressure due to SUMMARY OF THE INVENTION The present invention solves the abovementioned conventional problems, prevents eccentricity of the voice coil and prevents friction
with the gap, and reduces the decrease in sound pressure as an adverse effect, completely. It is
an object of the present invention to provide a stable flat speaker unit by bonding. The present
invention uses the outer peripheral roll as an edge by means of a concentric roll having a
horizontal portion projecting between the inner peripheral roll and the outer peripheral roll in
the direction of the flange of the coupling cone and the plane diaphragm. It has a W-type roll
connected with a coupling cone that drives the inner surface of the inner peripheral roll with a
flat diaphragm, eliminating gap rubbing, reducing the sound pressure drop as this problem, and
11-05-2019
1
achieving a stable flat-plate speaker by perfect bonding. It is possible to provide a unit.
DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will
be described below with reference to the drawings. FIG. 2 is a schematic structural crosssectional view of a flat speaker unit according to an embodiment of the present invention, and
FIG. 3 is an enlarged cross-sectional view of the main part. In FIG. 2 and FIG. 3, 10 is a concentric
W-shaped roll having a horizontal portion between the inner periphery and the outer periphery,
and 11 is a coupling cone.
The diaphragm 1, the voice coil 4, the damper 5, the frame 6, the plate end, and the center ball 8
are the same as those in the conventional example. As shown in FIG. 3, the horizontal portion 10a
between the W-shaped rolls 1o before assembly is at a higher position than the horizontal
portion 11a of the coupling core 711 and protrudes in the direction of the diaphragm 1. And the
diaphragm 1 and the W-type roll 10. When bonding with the coupling cone 11, the adhesive is
held down by the spring action of the W-type roll 10, and bonding between the diaphragm 1 and
the horizontal portions 10a and 11a can be easily performed. Also, the diaphragm 1 and the Wshaped roll 10. Before bonding the coupling cone 11, the coupling cone 11 and the voice coil 4
can be bonded together with the subensor put between the voice coil 4 and the center ball 8, and
the W-shaped roll 1o is also attached to the frame 6. It is fixed, prevents eccentricity of the voice
coil 4 and does not cause gap rubbing. In addition, the W-type roll 10 having the horizontal
portion 10a between the inner peripheral roll and the outer peripheral roll as described above is
simply connected with the coupling cone 11 by simply expanding the horizontal part 11a of the
coupling core 711 From the one connected to the edge, the decrease in the weight increase of
the adhesive due to the small bonding area, the decrease in the sound pressure decrease due to
the decrease in the weight increase due to the difference between the material of the coupling
cone 11 and the material of the W roll 10, adhesion failure It is possible to achieve a unique
effect that abnormal sound generation due to completeness is unlikely to occur. Effect of the
Invention As described above, in the present invention, the gap rub does not occur by connecting
the W-shaped roll and the coupling cone. In addition, complete adhesion can be easily performed
by the horizontal part between the inner circumference and outer circumference of the W-type
roll, the coupling core, the horizontal part and the diaphragm, and the weight increase of the
adhesive 2 etc. is small. It is possible to prevent the sound pressure drop due to
[0002]
Brief description of the drawings
[0003]
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2
1 is a schematic structural cross-sectional view of a conventional flat speaker unit, FIG. 2 is a
schematic structural cross-sectional view of a flat speaker unit according to the present
invention, and FIG. 3 is an enlarged cross-sectional view showing bonding between the edge and
the coupling cone. It is a stone in the figure.
1 и и и и и и и и и и и и и и и и и и и и и voice coil, 5 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 plate иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Center ball, 9 иии
Magnetic gap, 1 o иии W-shaped roll, 10 a, 11 a ииииии Horizontal part, 11 иии . Name of Agent Attorney
Nakao Toshio Other 1 person Figure 1 Figure 2 Figure 3
11-05-2019
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