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DESCRIPTION JPS59131297

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DESCRIPTION JPS59131297
[0001]
An object of the present invention is to provide a speaker in which the front plate and the
vibration surface can be positioned on the same plane when being incorporated into a box or a
cabinet. In general, the conventional speaker is configured as shown in FIG. -T, ie, a plate 2
having a center pole 1, a ring-shaped magnet 3. Similarly, the frame 6 is coupled to the magnetic
circuit 6 constituted by the ring-shaped upper plate 4, and the peripheral portion of the
diaphragm 8 is adhered to the peripheral portion of the frame 6 together with the gasket 7 by
adhesion or the like. The voice coil 9 is coupled to the part, the middle part of the voice coil 9 is
held by the damper LOK, and the lower part of the voice coil 9 is fitted into the magnetic gap 11
of the magnetic circuit 5 without eccentricity. The dust cap 12 was stuck on the upper surface. A
configuration in which a speaker having such a configuration is incorporated into a box or
cabinet as a speaker system or as an acoustic device is as shown in FIGS. 2 to 4. First, the
example shown in FIG. 2 shows an example of direct attachment from the front side to the
speaker 13'i box or the front plate 14 of the cabinet from the front side, and FIG. 3 is similarly
from the front side of the front plate 14. An example of mounting with a bolt 15 using the
mounting plate 16 is shown. 4 shows an example in which the speaker 13 is attached by a bolt
15 from the back side of the front plate 14. This example is often used when a net or the like is
fixed to the front. As described above, when assembling from the front plate of the front plate 14,
the peripheral portion of the frame 6 fully equipped with the gasket 7 and the like protrudes
outward when attaching a net etc., which causes a major obstacle in product design It was
Further, in the case of the configuration in which the front plate 14 is attached from the back
side, as shown in FIG. 5, the vibration surface of the speaker 13 is considerably intruded from the
surface of the front plate 140, so the sound waves radiated from the diaphragm 8 are front plate
As shown in b as compared with the characteristic color when it is reflected on the side of 14 and
the reflected sound interferes with the sound wave emitted directly from the diaphragm 8 as
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shown in FIG. There is a drawback that it rises in the midrange. The present invention eliminates
the above-mentioned conventional drawbacks. An embodiment of the present invention will be
described below with reference to FIGS. 7 and 8. FIG. First, in FIG. 7, a 17 id magnetic circuit,
which is a plate 19.
The ring-shaped magnet 2 o is configured by the same ring-shaped partial plate 21. A frame 22
is connected to the magnetic circuit 17, and a flat attaching portion 22 & and a bent portion 22b
protruding downward in the shape of a letter are formed on the outer periphery of the attaching
portion 221L at the periphery of the frame 22. A plurality of slits 220'il- are provided in the bent
portion 22b to provide elasticity. The peripheral portion of the diaphragm 23 is bonded to the
attached portion 22 & of the frame 22 by an adhesive. A voice coil 24 is coupled to a central
portion of the diaphragm 23, and an intermediate portion of the voice coil 24 is held by a
damper 25. A lower portion of the voice coil 24 is fitted into the magnetic gap 26 of the
magnetic circuit 17 without being eccentric. It is. In addition, a dust camp 27 is attached to the
upper surface of the central portion of the diaphragm 23. By making the speaker in this
configuration? If, as shown in FIG. 8, the V-shaped hole wall is formed as the speaker mounting
hole 29 of the front plate 28 of the speaker box or cabinet, and the speaker mounting hole 29 is
a bent portion of the frame 22 from the front side. 22b'i press fit and attach. Air leakage at the
connection between the speaker and the front plate 28 can be prevented by using an adhesive, a
cogging example, or a sealing backing. Then, in the mounted state, the front surface of the front
panel 2 and the front surface of the speaker are on the same surface, so the sound wave from the
diaphragm 23 has no obstacle, which adversely affects the sound pressure frequency
characteristics. It is possible to maintain 1% as a speaker without any problems. As described
above, since the speaker according to the present invention is configured, it has a configuration
in which it is incorporated from the front of the front plate of the speaker box or cabinet, but
there is no problem even when attaching a net etc. In addition, since the sound wave is directly
radiated to the atmosphere, the reflected sound is generated and the interference is not adversely
affected on the sound pressure frequency characteristics, and the quality is remarkably excellent,
and the practical value of It will be a dog.
[0002]
Brief description of the drawings
[0003]
1 is a half sectional view showing a conventional speaker, FIG. 2 to FIG. 4 are schematic views
showing the mounting of the same speaker, and FIG. 5 is a half sectional view showing the
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operation in the conventional mounting state 6 is a sound pressure frequency characteristic
diagram in the conventional state of T ', FIG. 7 is a half sectional front view showing one
embodiment of the speaker of the present invention, and FIG. 8 is a cross section of the main part
showing the mounting state of the speaker FIG.
17
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ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Slits ииииии Diaphragm, 24 иииииии Voice coil, 26 ииииииииииии
Magnetic gap. Name of Agent Attorney Nakao Toshio and others 1 person Figure 1 Figure 2
Figure 3 Figure 4 Figure 4 Figure 5 Figure 6
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