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JPS54181934

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DESCRIPTION JPS54181934
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of the diaphragm
portion of a conventional horn speaker, and FIG. 2 is a longitudinal sectional view showing an
essential part of one embodiment of the horn speaker according to the present invention, FIG. 4
and FIG. 4 are cross-sectional views showing another embodiment of the present invention with
respect to a diaphragm portion. 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · base · · · · · · · · · ring.
In the drawings, the same reference numerals indicate the same or corresponding parts.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horn speaker,
and more particularly to the improvement of the support structure of its diaphragm. As is well
known, the diaphragm support portion of the horn speaker vibrates as shown in FIG. A plate 1, a
support 2 for supporting the diaphragm 1, a ring 3 and a base 8 for clamping and fixing the
support 2, an air chamber 4 disposed at the front of the diaphragm 1, an air disposed at the rear
of the diaphragm l The chamber 5 is composed of an equalizer 6 and a horn 7 disposed on the
front side of the diaphragm 1 in reverse to the air chamber 5. In the horn speaker configured in
this way. n -'- 'r,' 1 air chamber 4 produces radial resonance when the wavelength of the sound
wave emitted from diaphragm 1 becomes smaller than the inner diameter of ring 3, and 7 on the
output sound pressure characteristic It is known that the radial resonance frequency of the air
chamber 4 is inversely proportional to the size of the inner diameter of the ring 3 6 which
produces a valley of about 16 dB. However, in the conventional horn speaker, since the inner
diameter of the ring 3 is constant, (1) the radial resonance sharply occurs at a specific frequency
corresponding to the inner diameter of the ring 3 to cause deterioration of output sound
pressure characteristics and harmonic distortion. There was a defect-This invention was made to
eliminate the above-mentioned defects, and the support for supporting the diaphragm was (a
plurality of rings having different inner diameters as a ring for clamping and fixing with a screw).
Sound pressure characteristics by dispersing resonance frequencies generated in the radial
direction of the air chamber at the front of the diaphragm by configuring the length of the air
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chamber at the front of the diaphragm to be different from one another by using two stacked
rings It is an object of the present invention to provide a horn speaker capable of reducing
valleys occurring at the same time and reducing harmonic distortion. An embodiment of the
present invention will be described below with reference to FIGS. 2 to 3. FIG. 2 is a longitudinal
sectional view showing an embodiment of the horn speaker according to the present invention, in
which 1 is a diaphragm, 2 is a support for supporting the diaphragm 1, 4 are disposed at the
front of the diaphragm 1 Air chamber, 5 an air chamber disposed at the rear of the diaphragm 1,
6 an equalizer, 7 a horn, 8 a pace, 9 a first ring having an inside diameter equal to the inside
diameter of the pace 8, 10 a And the second ring stacked on the first ring 9 of the present
invention, ie, the present invention is based on the support 2 for supporting the diaphragm 1 and
the plurality of stacked rings 9.10 having different paces 8 and different inner diameters. It is
comprised so that it may clamp and fix. Therefore, according to the present invention, the radial
length of the air chamber 4 disposed at the front of the diaphragm 1 depends on the tl by the
first ring 9 and the second ring 1 o.
And the length of 1. . 1. Because the radial resonance frequency of the air chamber 4 in front of
the diaphragm 1 is dispersed, it is possible to reduce valleys generated on the output sound
pressure characteristic and to reduce high frequency distortion. In particular, if the first ring 9
which flanges the support 2 as illustrated in FIG. 2 and the second ring 10 whose inner diameter
is smaller than the inner diameter of the ring 9 are combined and arranged, the above-mentioned
radial resonance frequency Can be moved to higher frequencies, and the use band can be
expanded. In the above embodiment, the support 2 used has a flat cross section, but the
invention is limited thereto. Alternatively, for example, a U-shaped support 2 as shown in FIG. 3
or a support 2 as shown in FIG. 4 may be used, and the same effect as in the above embodiment
can be obtained by these wedges. Needless to say. Also the first ring 9. The second ring 10a is
not limited to the single ring shown in FIG. 2, but may be shared by another structure, for
example, the equalizer 6 or the horn 7.
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