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JPH0565194

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH0565194
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
nondirectional speaker, and more particularly to a nondirectional speaker in which the wiring
structure of a high-pitched sound reproducing portion is improved and disturbance of a sound
field is minimized.
[0002]
2. Description of the Related Art A conventional non-directional speaker is one in which a large
number of speaker units are attached to a cylindrical casing, but this non-directional speaker
uses a large number of speaker units and thus many speakers are used. There is a drawback that
it becomes a sound source and the localization is not determined when listening at a short
distance. Therefore, in order to eliminate the drawbacks of the above conventional nondirectional
speakers, we have made the nondirectional speakers as shown in FIGS. It was previously
provided (Japanese Patent Application No. 3-238957). FIG. 5 is a perspective view of the
nondirectional speaker, FIG. 6 is a cross sectional view showing the nondirectional speaker, and
FIG. 7 is a perspective view of the bridge leg member. In the figure, S is the entire nondirectional
speaker, and is mounted coaxially with the bass reproduction unit 2 mounted upward on the
upper surface of the cabinet K and the bass reproduction unit 2, and the treble reproduction unit
3 and the reflector 4 And a support 5 for connecting the high sound radiation portion H and a
bridge leg 6 for supporting the high sound radiation portion H with a bridge structure. The hightone radiation portion H is configured to form a horn shape with the curved surfaces of the hightone reproduction portion 3 and the reflector 4 which are disposed opposite to each other, and
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the high-tone radiation portion H facing the low-tone reproduction portion 2 On the bottom side
of the reflector 31 is formed a reflection portion 31 for diffusing the low-pitched sound. In the
figure, 7 is a duct. Further, although the high-pitched sound reproducing unit 3 is attached
upward in the drawing, the high-pitched sound reproducing unit 3 is attached downward, and the
reflector 4 is attached downward. A plurality of (three in the illustrated example) bridge piers
made of a pipe such as aluminum are arranged in the bridge pier portion 6, and the connection
to the high tone radiation portion H is the reflector 4 located above the high tone radiation
portion H or the high tone playback portion Connected to three.
[0003]
In the wiring structure of the nondirectional speaker S, wires 8, 8 from a network (not shown) in
the cabinet K are inserted into one of the bridge legs 6 of the bridge legs 6, and a high sound
radiation portion When the reflector 4 is positioned on the upper side in H, the wires 8 and 8 are
connected to the high-sound reproduction unit 3 via the reflector 4 and the support 5.
[0004]
However, in the above wiring structure, the process of inserting the relatively thin wires 8 and 8
into the bridge 6 and the column 5 is laborious and lacks workability. There was a point that
should be improved.
Moreover, if the pipe diameter of the bridge pier 6 and the column 5 is increased in order to
improve this, the bridge pier is originally located in the sound field of the high-sound radiating
portion H, and thus the radiation is disturbed to deteriorate the characteristics. If, on the other
hand, the thin wire 8 is used and the pipe diameter of the bridge leg 6 and the column 5 is
reduced accordingly, the DC resistance increases and the damping factor worsens to deteriorate
the sound quality. There have been some problems to be improved, such as a problem in the
holding strength of the radiation portion H.
[0005]
The object of the present invention is to provide a nondirectional speaker having a structure in
which a high sound radiation portion disposed opposite to a low sound reproduction portion is
supported by a bridge portion. Wiring operation of the high sound reproduction portion is easy
and high sound radiation An object of the present invention is to provide a nondirectional
speaker which is excellent in the holding strength of a part and applied to the above
nondirectional speaker as proposed above.
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[0006]
SUMMARY OF THE INVENTION A nondirectional speaker according to the present invention
comprises a bass reproduction unit mounted upward on the upper surface of a cabinet, and
coaxially disposed with the bass reproduction unit and high-pitched reproduction In an
omnidirectional speaker comprising: a high sound radiation portion constituted by connecting a
portion and a reflector with a support; and a bridge leg portion for supporting the high sound
radiation portion with a bridge structure, at least one of the above bridge portions The bridge
pier of this invention is made into the signal input path of a high-tone reproduction ¦
regeneration part, and the bridge pier which is this signal input path is comprised with the
electrically-conductive member and the insulation member.
In this case, as the configuration of the bridge leg portion, two bridge legs formed by covering
one conductive member with the insulating member may be arranged to support the high sound
radiating portion by the two bridge legs, and a plurality of bridge legs may be provided. The high
sound radiating portion may be supported by a single bridge leg formed by dividing a conductive
member of the book by an insulating member.
[0007]
One end of the bridge leg is fixed to the cabinet side, and the other end of the bridge leg supports
the high sound radiating portion, but at least one of the bridge legs is composed of a conductive
member and an insulating member. This is used as the signal input path of the treble
reproduction unit. A lead wire from a network inside the cabinet is connected to the end of the
bridge leg which is a signal input path, and a lead from the high-pitched sound reproducing
portion is connected to the end on the high-pitched radiation portion.
[0008]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the
nondirectional speaker according to the present invention will be described based on FIGS. 1 to
4. FIG. 1 is a cross-sectional view of the main part of the nondirectional speaker in the first
embodiment, FIG. 2 is a perspective view of the bridge in the first embodiment, FIG. 3 is a
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perspective view showing another embodiment of the bridge, and FIG. It is sectional drawing of
the principal part of the nondirectional speaker using a bridge pier. The same parts as those in
the conventional example described with reference to FIGS. 5 to 7 are denoted by the same
reference numerals, and the description thereof will be omitted.
[0009]
(Embodiment 1) The nondirectional speaker S is disposed coaxially with the bass reproduction
unit 2 mounted upward on the upper surface of the cabinet K and the bass reproduction unit 2
and is reflected by the treble reproduction unit 3 It consists of a high sound radiation portion H
configured by connecting the body 4 with a support 5 and a bridge leg portion 6 for supporting
the high sound radiation portion H with a bridge structure. The conductive member 11 and the
insulating member 12 are configured such that at least one of the bridge piers 6 a of the bridge
piers 6 becomes the signal input path 1 of the high-pitched sound reproducing unit 3. In FIG. 1,
the treble radiation section H is supported by two bridge piers 6 a and 6 a, and the bridge piers 6
a and 6 a form the signal input path 1 of the treble regeneration unit 3. As shown in FIG. 2, the
bridge pier 6a has a configuration in which the conductive member 11 is covered with the
insulating member 12. In this embodiment, the conductive member 11 is a copper rod having a
diameter of 5.0 mm. The conductive member 11 is covered with a rubber tube of 0.5 mm in
thickness as the insulating member 12, and the conductive member 11 is exposed from both
ends thereof, subjected to a bending process of R45 mm, and two are used to form the signal
input path Of the bridge piers 6a and 6a. Of course, the conductive member 11 may be a metal
other than copper, and the insulating member 12 may be a plastic film of vinyl chloride or the
like, an insulating plating, or the like.
[0010]
The connection wiring form of the bridge pier 6a will be described only on the positive side. First,
the base end of the bridge pier 6a is inserted into the cabinet K and fixed. In this case, the plug P
of the lead 91 drawn from the positive side network 9 is fitted to the end of the conductive
member 11. Next, the high-pitched sound reproducing unit 3 is connected to the other end of the
bridge pier 6a. At this time, the lead wire 93 from the high-pitched sound reproducing unit 3 is
soldered to the conductive member 11. Next, the support 5 is erected in the support mounting
hole 32 of the high-sound reproduction unit 3, and the reflector 4 is attached to the top of the
support 5. In this case, if the base end of the column 5 is screwed into contact with the end of the
bridge leg 6a, the column 5 is screwed into the high-sound reproduction unit 3 and the end of
the column 5 is pressed against the end of the bridge. As a result, the work of fixing the bridge
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pier 6a to the high-tone reproduction unit 3 can be omitted. In the figure, reference numeral 92
denotes a lead wire from the plus side network 9 to the bass reproduction unit 2.
[0011]
According to the above configuration, by attaching the bridge pier 6a to the network 9 and the
high-pitched sound reproducing unit 3, stable power transmission of the audio signal to the highpitched sound reproducing unit 3 becomes possible. Moreover, since the bridge pier 6a is
produced using a metal rod, the holding strength of the high-tone radiation portion H can be
sufficiently secured. Furthermore, since it is possible to achieve extremely high accuracy even in
bending, etc., the center of the bass reproduction portion 2 and the center of the treble radiation
portion H can be mounted in agreement, and therefore, even high bass can be uniformly radiated.
There is no disturbance of the sound field.
[0012]
(Embodiment 2) In the embodiment shown in FIG. 3, a bridge leg 6a which is a signal input path
1 is constructed by partitioning a plurality of conductive members 11 by an insulating member
12. In this case, the plurality of conductive members and the insulating member can be coaxially
formed such that the conductive members 11 and the insulating members 12 alternate, or can
have a stacked structure. In this case, if the cross-sectional areas of the conductive members 11
and 11 are formed to be the same, the direct current resistance value becomes the same, so that
the deterioration of the sound quality can be prevented.
[0013]
If the bridge pier 6a is configured as in the embodiment of FIG. 3, as shown in FIG. 4, one bridge
pier 6a can constitute signal input paths on the plus side and the minus side. Therefore, the hightone radiation portion H can be supported by only one bridge 6 a and held in a cantilever
manner. The connection to the network and the high-tone reproduction unit 3 is the same as in
the case of FIG. In the case of this embodiment, since the bridge pier 6a is slightly thicker than
that of the first embodiment, there is no problem in the holding strength of the high sound
radiation portion H, and furthermore, only one bridge pier 6 is provided. It has no effect on the
emission of highs and lows. Although not shown, the bridge 6a can be provided with a
conductive portion other than the signal input path for the high-pitched sound reproducing
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portion 3. For example, an illumination device is provided in the reflector 4 to bridge the
conductive portion for the illumination device. A nondirectional speaker S which can be disposed
at 6a and has such a configuration can be provided.
[0014]
According to the nondirectional speaker of the present invention, at least one of the bridge piers
serves as a signal input path of the high-sound radiating unit, and the bridge is a conductive
member and Since it is comprised of an insulating member, not only the wiring work becomes
extremely easy, but also the high sound radiating portion can be held with sufficient strength. In
addition, since the high sound radiation portion is supported by one or two bridge piers, the
disturbance of the wave front of the radiated sound can be reduced, and further, the conductive
bridge portion other than the signal input path for the high noise regeneration portion Since it is
possible to arrange the speaker, for example, by arranging the illumination device in the
reflector, it is possible to provide a nondirectional speaker with high design effect.
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