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JPS61158297

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DESCRIPTION JPS61158297
[0001]
[Technical Field 1 of the Invention] The present invention relates to a square cone speaker
apparatus in which a square cone-shaped auxiliary diaphragm is fixed to a square cone-shaped
diaphragm. [Technical background of the invention and its problems] Recently, as a square cone
type speaker device, one as shown in FIGS. 1 and 0 is known. That is, in FIG. 10 and FIG. 11, the
code ¦ symbol 1 has shown the porcelain circuit comprised from the magnet 2, the top plate 3,
the bottom plate 4, and the center pole 5 in square. In the magnetic circuit 1, a porcelain gap
portion 6 is formed between the top plate 3 and the center pole 5. This magnetic whistle! A voice
bobbin 8 on which a voice coil 7 is wound is loosely inserted in the space 6. On the outer
periphery of one end of the voice bobbin 8, the inner peripheral portion 9A of the angular coneshaped diaphragm 9 consisting of the corner portion 9a and the flat inclined portion 9b is fixed.
The outer peripheral portion 9 B of the diaphragm 9 in front of the square cone is fixed to the
frame 11 fixed to the top plate 3 of the porcelain circuit 1 via the edge 10. Reference numeral 12
denotes a damper interposed between the voice bobbin 8 and the frame 11, and reference
numeral 13 denotes a center cap fixed to the square cone-shaped diaphragm 9 so as to surround
the tip of the voice bobbin 8. It shows. However, in the conventional square cone type speaker
device configured as described above, the strength of the corner portion 9a of the square coneshaped diaphragm 9 is different from that of the flat inclined portion 9h. It is not transmitted to
the square cone-shaped diaphragm 9 faithfully, and the square cone-shaped diaphragm 9 causes
divided vibration, and as a result, the frequency characteristic is greatly disturbed from middle to
high frequencies, and second-order distortion characteristic, Since the third-order distortion
characteristics also exist in large amounts from low to high frequencies, there is a point li
that the acoustic characteristics of the square cone type speaker device are significantly
deteriorated. Therefore, a square cone type speaker device as shown in FIG. 12 and FIG. 13 has
been proposed -C. That is, the outer peripheral portion 14a of the angular cone-shaped auxiliary
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diaphragm 14 is fixed to the flat inclined portion 9b of the angular cone-shaped diaphragm 9,
and the inner peripheral portion 1 / 1.1 of the angular cone-shaped auxiliary diaphragm 14 is
fixed. This is a corner cone type speaker device in which b is fixed to the flat inclined portion 9 b
of the corner cone shaped diaphragm 9 in the vicinity of the voice bobbin 8. The angular cone
type auxiliary diaphragm used in this angular cone type speaker device is, as shown in FIG. 14,
formed by projecting the inner surface of the angular cone type auxiliary diaphragm 14 in a
circular arc, so-called curved It is considered to be corn.
The square cone type speaker device provided with the square cone shaped auxiliary diaphragm
is configured by fixing the angular cone shaped auxiliary diaphragm 14 to the square cone
shaped moving plate 9 to obtain the angular cone shaped moving plate 9. The strength between
the corner portion 9a and the flat inclined portion 9h can be sufficiently uniform, and as a result,
the divisional vibration generated in the flat inclined portion 9b of the square cone-shaped
diaphragm 9 can be suppressed to obtain good acoustic characteristics. You can get it. By the
way, in the square cone type speaker device provided with the square cone shaped auxiliary
diaphragm, since the square cone shaped auxiliary diaphragm 14 is fixed to the flat inclined
portion 9b of the square cone shaped diaphragm 9, the angular cone type Auxiliary diaphragm
14 li! There is a possibility that the i1 wearing failure may occur, and the adhesive (not shown)
may run out and reduce the design of the C-corner-corner-shaped diaphragm 9. SUMMARY OF
THE INVENTION The present invention has been made to address such a problem, and it is
possible to firmly and reliably fix a square cone-shaped auxiliary diaphragm to a square coneshaped vibration plate, and It is possible to effectively prevent the low F of the design of the 1one diaphragm, and to obtain a uniform and sufficient strength between the corner portion and
the flat inclined portion of the square cone diaphragm. As a result, it is an object of the present
invention to provide a square cone type speaker device in which acoustic characteristics are
improved by suppressing divided imaging 1 generated in a flat slope portion of a diaphragm.
[Summary of the Invention] That is, the square cone type speaker device according to the present
invention is inserted and fitted into an angular cone type diaphragm having a flat sloped portion
between corners and an inner peripheral portion of the square cone type diaphragm. A square
cone type consisting of a cylindrical voice bobbin housed between the porcelain gaps of a
porcelain circuit having a cylindrical magnetic gap, and a frame that vibratably supports the
outer peripheral portion of the front angle cone shaped diaphragm via an edge. In the speaker
device, a horizontal portion is formed on a flat inclined portion of the angular cone-shaped
diaphragm, an outer peripheral horizontal portion of the auxiliary diaphragm is fixed to the
horizontal portion, and an inner peripheral portion of the auxiliary diaphragm is mounted on the
voice bobbin It is characterized in that it is fixed to the flat sloped portion of the nearby square
cone-shaped diaphragm. DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments
of the present invention will be described in detail with reference to the drawings. In the
following drawings, parts common to FIGS. 10 and 11 are assigned the same reference numerals
and descriptions thereof will be omitted. FIG. 1 is a perspective view showing a square cone type
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speaker device according to an embodiment of the present invention, and FIG. 2 is a cross
sectional view of FIG. In the corner cone type speaker device of this embodiment, as shown in
FIG. 1 and FIG. 2, an angled horizontal portion 9C is formed on the flat inclined portion 9h of the
corner cone diaphragm 9. As shown in FIG.
An outer peripheral horizontal portion 20a formed on the outer periphery of the angular coneshaped auxiliary diaphragm 20 is fixed to the horizontal portion 9C. The inner peripheral portion
20 b of the angular cone-shaped auxiliary diaphragm 20 is fixed to the flat inclined portion 9 h
of the angular cone-shaped diaphragm 9 near the voice bobbin 8. As shown in FIG. 3, the angular
cone-shaped auxiliary diaphragm 20 is a so-called curved cone in which an outer peripheral
horizontal portion 20a is formed on the outer periphery, and an inner side surface is formed in
an arc shape. In the angular cone type speaker apparatus configured in this way, since the outer
peripheral horizontal portion 20a of the auxiliary cone 20 is fixed to the horizontal portion 9C of
the angular cone shaped diaphragm 9, the horizontal portion 9C and the outer peripheral level
are horizontal. By the portion 20a, the square cone-shaped auxiliary diaphragm 20 can be firmly
and reliably fixed to the square cone-shaped diaphragm 9, and the angular cone-shaped
diaphragm 9 is formed by the protrusion of the adhesive (not shown). Effectively preventing a
decrease in designability C, the strength of the flat inclined portion 9 h and the corner portion 9
a of the square cone-shaped diaphragm 9 becomes uniform, and as a result, the frequency
characteristics of the square cone-shaped diaphragm 9 Can be -C flat from the low frequency
range to the entire high frequency range, and second order distortion characteristics and third
order distortion characteristics can be sufficiently suppressed, and good acoustic characteristics
can be obtained. FIG. 4 is a perspective view showing a sacral embodiment of the present
invention, and FIG. 5 is a cross-sectional view of FIG. In the square cone type speaker device of
this embodiment, as shown in FIGS. 4 and 5, a circular horizontal portion 9d is formed on the flat
J1 inclined portion 9h of the square cone diaphragm 9. A circular horizontal portion 21a formed
on the outer periphery of the cone-shaped auxiliary diaphragm 21 is fixed to the horizontal
portion 9d. The inner peripheral portion 21 b of the cone-shaped auxiliary diaphragm 21 is fixed
to the flat inclined portion 9 b of the square cone-shaped diaphragm 9 near the voice bobbin 8.
As shown in FIG. 6, the cone-shaped auxiliary diaphragm 21 used in this embodiment has a
circular horizontal portion 21a formed on the outer periphery and a so-called curved surface in
which the inner side surface is formed in an arc shape C. It is considered to be corn. In the square
cone type loudspeaker system thus configured, the circular horizontal portion 21a formed on the
outer periphery of the auxiliary diaphragm 21 of the cone shape is fixed to the circular
horizontal portion 9d of the square cone diaphragm 9 By the circular horizontal portion 9d and
the circular horizontal portion 21a, the cone-shaped auxiliary diaphragm 21 can be firmly and
reliably fixed to the square cone-shaped diaphragm 9, and the protrusion of the adhesive (not
shown) It is possible to effectively prevent the deterioration of the design of the angular coneshaped diaphragm 9 due to the above, and the strength of the flat inclined portion 9b and the
corner portion 9a of the angular cone-shaped diaphragm 9 becomes uniform. The frequency
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characteristic becomes flat over the entire range from the low band to the high band, and the
second-order distortion characteristic and the third-order distortion characteristic can be
sufficiently suppressed, and good acoustic characteristics can be obtained.
FIG. 7 is further 111 of the present invention! FIG. 8 is a cross-sectional view of FIG. 7 showing
an embodiment of the present invention. j In the corner cone type speaker device of this
embodiment, as shown in FIGS. 7 and 8, a concave groove 90 is provided in the flat inclined
portion 9b of the corner cone type diaphragm 9. A rectangular horizontal portion 9f is formed. In
this horizontal portion 9 f, an outer peripheral horizontal portion 22 a formed on the outer
periphery of the angular cone-shaped auxiliary diaphragm 22 corresponds to a concave groove
22 b formed in the outer peripheral horizontal portion 22 a. It is fitted and fixed to 9e. The inner
peripheral portion 22 c of the angular cone-shaped auxiliary diaphragm 22 is fixed to the flat
inclined portion 9 b of the angle = 1-shaped diaphragm 9 near the voice bobbin 8. As shown in
FIG. 9, the angular cone-shaped auxiliary diaphragm 22 has an outer peripheral horizontal
portion 22a having a recessed groove 2211 formed on the outer periphery, and a so-called
curved cone in which the inner side surface is formed in an arc shape. It is being done. In the
angular cone type speaker apparatus configured in this manner, the concave groove 90 provided
in the horizontal portion 9 f of the angular cone shaped diaphragm 9 is provided in the outer
peripheral horizontal portion 22 a of the angular cone shaped auxiliary diaphragm 22. Since the
concave groove 22b is fitted and fixed, the angular cone-shaped auxiliary @ moving plate 20 can
be easily positioned on the square cone-shaped diaphragm 9 and can be firmly and reliably fixed
to C, and the adhesive It is possible to effectively prevent the deterioration of the designability of
the angular cone-shaped diaphragm 9 due to the protrusion (not shown), and the strength of the
flat inclined portion 9b and the corner portion 9a of the angular cone-shaped diaphragm 9
becomes uniform. As a result, the frequency characteristics of the angular cone-shaped
diaphragm 9 become flat over the entire range from the low region to the high region, and the
second-order distortion characteristics and the third-order distortion characteristics can be
sufficiently suppressed. Characteristics can be obtained. In each of the embodiments described
above, although an example in which the inner periphery of the center cap and the auxiliary
diaphragm is fixed to the flat 10 inclined portion of the square cone-shaped diaphragm in the
vicinity of the voice bobbin, -C is described. Of course, the plate and the center cap may be
integrally formed and fixed to the square cone-shaped diaphragm. Thus, by integrally forming
the auxiliary diaphragm and the center cap, it is possible to significantly reduce the
manufacturing cost of the auxiliary diaphragm and the center cap. [Effects of the Invention 1 As
described above, according to the square cone type speaker device of the present invention, a flat
horizontal portion is formed on the flat inclined portion of the square cone-shaped diaphragm,
and the outer periphery of the auxiliary diaphragm is formed on this flat horizontal portion. The
auxiliary diaphragm is firmly fixed to the square cone-shaped diaphragm because the inner
peripheral portion of the auxiliary diaphragm is fixed to the flat inclined portion of the square
cone-shaped diaphragm near the voice bobbin. It is possible to effectively prevent the
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deterioration of the design of the square cone-shaped diaphragm, and to make the strength of
the corner portion and the flat inclined portion of the square cone-shaped diaphragm uniform
enough. As a result, it is possible to obtain good acoustic characteristics by suppressing divisions
and vibrations generated in the flat portion,..., The slant portion of the diaphragm.
[0002]
Brief description of the drawings
[0003]
1 is a perspective view showing a square cone type speaker device according to an embodiment
of the present invention, FIG. 2 is a cross sectional view of FIG. 1, and FIG. 3 is a square cone
used in the embodiment of FIG. 4 is a perspective view showing another embodiment of the
present invention, FIG. 5 is a cross-sectional view of FIG. 4, and FIG. 6 is a view of the
embodiment shown in FIG. FIG. 7 is a perspective view showing still another embodiment of the
present invention, FIG. 8 is a cross-sectional view of FIG. 7, and FIG. 10 is a perspective view
showing a conventional square cone type speaker device, FIG. 11 is a cross sectional view of FIG.
10, FIG. FIG. 12 is a perspective view showing a square cone type speaker apparatus provided
with a square cone-shaped auxiliary diaphragm, FIG. 13 is a cross sectional view of FIG. 12, and
FIG. 14 is used for the example of FIG. Is a perspective view showing the angular cone of
auxiliary diaphragm.
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