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JPS55146781

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPS55146781
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
composite coaxial speaker system, FIG. 2 is a cross-sectional view of a composite coaxial speaker
system showing one embodiment of the present invention, and FIG. It is an expanded sectional
view showing a fixing part of a speaker and an inner edge. In the figure, the same reference
numerals indicate the same or corresponding parts, 1 is a bass speaker, 2 is a treble speaker, 3 is
a cabinet, 4b is a hollow disk diaphragm, 5b is an outer edge, 5c is an inner edge, 8 is an outer
frame, 9 is an inner frame, and 10 is a high-pitched speaker frame.
DETAILED DESCRIPTION OF THE INVENTION The object of the present invention is to provide a
loudspeaker system, in particular a composite coaxial loudspeaker, which is capable of high
fidelity reproduction. The band to be reproduced by the speaker is the human audible range, ie,
from 29 Hw to 20 KH 1 l +, “(1 ゝ / J b 4? It becomes a wide range. Since it is almost impossible
technically to reproduce a wide band with one speaker like this, in the case of a speaker aiming
for faithful reproduction, the above-mentioned band is usually divided into several, and in each
band A separate speaker is used to play. Although this is a system called a composite speaker
system, the problem in this case is that the sense of direction of one sound and the sound image
become unclear because the number of speakers is plural in accordance with the reproduction
band. As a method of solving this problem, there is a coaxial speaker system. This is a system in
which a bass speaker and a treble speaker are arranged on the same axis, and is often used
because of the good localization of the sound source. However, this method also has
disadvantages. That is, the drawback is that the sound from the high-pitched speaker is disturbed
by the low-pitched speaker. Hereinafter, the conventional speaker will be described in detail with
reference to the drawings. FIG. 1 is a cross-sectional view of a conventional composite coaxial
speaker in which a bass reproduction speaker and a treble reproduction speaker having a coneshaped diaphragm are arranged on the same (2) axis, and (1) in the figure is a bass The speaker
(2) is a door sound speaker, (3) is a cabinet, (4a) is a diaphragm of the bass speaker (1), and (Sa)
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is an edge of the bass speaker. In such a conventional speaker, the sound radiated from the highpitched speaker (2) is reflected by the sound traveling along the front axis (6) and the
unevenness of the diaphragm (4a) or the edge (5a) of the bass speaker f11. And there is a sound
(7) that returns to the front direction. Since there is a phase shift between the two sounds (6) and
(7) according to the distance difference, interference occurs on the front axis, and the sound
pressure characteristics on the front axis of the high-tone speaker are disturbed. This device has
been made in view of the above problems, in which the sound radiation surface of the highpitched speaker and the diaphragm of the low-pitched speaker, the edge and the baffle surface of
the cabinet are made to be y planes. The details of this invention will be described below
according to the illustrated embodiment. That is, in FIG. 2, +1 is a bass speaker, (2) is a treble
speaker, (3) is a cabinet, and (4b) is a diaphragm of the bass speaker in a hollow disk shape (3).
(Force) is the outer edge of the waveform that fixes the outer peripheral end of the moving plate
(4b) to the outer frame (8) K, and (5C) is the inner peripheral end of the diaphragm (4b) to the
inner frame (9) It is an inner edge of the waveform to be fixed, and the outer frame (8) and the
inner frame (9) are formed by die-casting of aluminum.
am is composed of a large iron plate which has sufficient strength with the above-mentioned
high-pitched speaker (the frame of 21 and can be made thin. The detail of the attachment part to
the inner frame (9) of high-pitched speaker +21 is shown in FIG. As is apparent from this figure,
the high-pitched speaker frame 0 is made of a thin iron plate, and is fixed to the inner farm + 9 +
Ic from above the inner edge (5C). In the speaker system configured as described above, the
high-tone speaker frame al is made of an iron plate, so that it is thin and has sufficient strength
to hold the high-tone speaker (2). The position of the diaphragm (4b) of the speaker and the
position of the treble speaker (2) can be made substantially flush with each other, and thus travel
along the diaphragm from the treble speaker (2) (4) 7) The diaphragm (4b), the edge (5b), (sc)
and the baffle surface of the cabinet (3) are almost flat, so that they do not receive any
unnecessary reflection; The characteristic is that of the high-pitched speaker. Furthermore in this
device the bass speaker (! The high-pitched speaker (2) assembled in frame a · is fixed on top of)
to improve the workability when producing the speaker system, and in the combined type
speaker system, the high-pitched sound than the low-pitched speaker (1) Since the speaker 121
is more likely to break down, it is convenient to be able to remove the high-tone speaker (21
separately from the bass speaker) for repair or replacement. Also, it is necessary to make the
outer frame (8) to fix the diaphragm (4b) of the low-frequency speaker (1) and the inner frame +
91 フ レ ー ム aluminum die-cast as the high-sound speaker frame α · This is to reduce the
number of work processes at the time of manufacture since there is no need. As mentioned
above, in this device, the diaphragm of the bass speaker in the compound coaxial speaker (5) is
formed into a hollow disk and the frame for the treble speaker is formed of an iron plate to be
thin, and the treble speaker fixed to this frame The high-pitched speaker can be removed
separately by assembling it from the top of the low-pitched speaker, and furthermore, from the
sound emitting surface of the high-pitched speaker and the diaphragm of the low-pitched
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speaker to the baffle surface of the canopy net may be flush The sound pressure handedness on
the front axis is not affected by unnecessary reflections from the high-pitched speaker, so that
the original characteristics of the high-pitched loudspeaker can be obtained and convenient for
replacement work or repair when the high-pitched loudspeaker breaks down. It is.
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