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JPH1169477

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DESCRIPTION JPH1169477
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
repulsive magnetic circuit type speaker system.
[0002]
2. Description of the Related Art In a woofer system which is one of the conventional speaker
systems, for example, as shown in FIG. 2, a diaphragm 41, an edge 41a, a damper 42, an input
terminal 43, a chamber 44, a voice coil bobbin 45, a voice coil 46. When the speaker unit 40
having a relatively small diameter and including the magnet 47, the yoke 48, the top plate 49
and the frame 50 is attached to the opening 31a of the front baffle of the cabinet 30, the
diaphragm 61 is A speaker unit 60 including an edge 61a, a damper 62, an input terminal 63, a
chamber 64, a voice coil bobbin 65, a voice coil 66, a magnet 67, a yoke 68, a top plate 69, and a
frame 70 is provided. S3 and S4 are The speaker unit 40 and 60 are driven by the same input
signal supplied to the input terminals 43 and 63 so that the openings of the duct 20 and the
front baffle 31 are provided. There is a method of enhancing the low region by increasing the
amount of air discharged from the portion 31b to the outside of the cabinet.
[0003]
Further, as shown in FIG. 3, there is also a method of enhancing bass by an active speaker +
passive speaker in a closed type woofer system.
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1
Here, the active speaker 80 includes a diaphragm 81, an edge 81a, a damper 82, an input
terminal 83, a chamber 84, a voice coil bobbin 85, a voice coil 86, a magnet 87, a yoke 88, a top
plate 89 and a frame 90. , And driven by the input signal supplied to the input terminal 83. The
passive speaker 100 includes the diaphragm 101, the edge 101a, the damper 102, the chamber
103, and the frame 104, and is attached to the opening 31c of the front baffle of the cabinet 30.
[0004]
However, in the case of the woofer system shown in FIG. 2, a volume for driving each of the
speaker units 40 and 60 is required, and the depth of the cabinet 30 can be obtained even when
using a small diameter unit. And the cabinet 30 can not be miniaturized. In addition, two systems
of input are also required, and the number of wiring steps is increased.
[0005]
Further, in the case of the woofer system shown in FIG. 3, since the passive speaker 100 is used,
the system is a closed type, and the cabinet size is inevitably increased because a larger volume
of the cabinet 30 is required as compared with the bass reflex type. In addition, distortion of
sound due to the passive speaker 100 also increases.
[0006]
An object of the present invention is to solve the above-mentioned conventional problems and to
provide a repulsive magnetic circuit type speaker system capable of enhancing the bass without
substantially increasing the volume of the cabinet.
[0007]
A repulsive magnetic circuit type speaker system according to the present invention is a
repulsive magnetic circuit type speaker system according to claim 1, wherein the first and second
magnets are arranged such that the same poles face each other. A repulsion magnetic circuit type
speaker system in which a repulsion magnetic circuit type speaker in which first and second
vibration systems having two different diameters are arranged via one voice coil in a magnetic
circuit is mounted on a cabinet, wherein said repulsion magnetic circuit The type speaker is
characterized in that it is attached to the cabinet so that it is emitted to the outside directly from
one vibration system and emitted to the inside of the cabinet from the other vibration system.
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2
[0008]
Further, in the repulsive magnetic circuit type speaker system according to the present invention,
as described in claim 2, one voice coil is disposed in the repulsive magnetic circuit in which the
first and second magnets are arranged such that the same poles face each other. A repulsive
magnetic circuit type speaker system in which a repulsive magnetic circuit type speaker in which
first and second vibration systems having two different diameters are arranged is attached to a
cabinet, wherein said repulsive magnetic circuit type speaker has one vibration The system is
attached to the front baffle, the other vibration system is attached to the inside of the cabinet,
and the space in which the repulsive magnetic circuit type speaker is attached in the cabinet and
the sound from the other vibration system to the front It is characterized in that a partition
member is provided to partition the space from which the
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view showing an
embodiment of a repulsive magnetic circuit type speaker system according to the present
invention.
Here, an embodiment in the case of being used for a bass reflex type speaker system is shown,
and a repulsive magnetic circuit type speaker in which two vibration systems 1A and 1B having
different diameters are arranged in the repulsive type magnetic circuit 2 via one voice coil 8 It is
characterized in that 1 is used.
[0010]
The repulsion magnetic circuit 2 arranges the ring-shaped magnets 3 and 4 so that the same
poles face each other and generally increases the magnetic flux density between the two magnets
in order to increase the magnetic flux density. The magnets 3 and 4 and the center plate 5 are
held by a holder 6 made of a nonmagnetic material.
The holder 6 is fixed to the sealing tube 33 by a mounting screw 19 and plays a dual role of
setting the magnets 3 and 4 and the center plate 5 at the center of the voice coil 8 and fixing.
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3
[0011]
The two vibration systems 1A and 1B are joined to one end of the voice coil bobbin 7, to the
diaphragm 9 provided with the edge 9a and the chamber 12, and to the other end of the voice
coil bobbin 7, from the diaphragm 9 The diaphragm 13 has a large aperture and is provided with
an edge 13a.
The voice coil bobbin 7 is supported by two dampers 10 and 14, and the two dampers 10 and 14
are respectively fixed to frames 16 and 17 disposed to face each other via an annular spacer 15.
The ends of the frames 16 and 17 are fixed to the front baffle 31 and the sealing tube 33 of the
cabinet 30 respectively by mounting screws 18. One voice coil 8 is wound around the voice coil
bobbin 7, and the voice coil 8 is electrically connected to the input terminal 15 through a tinsel
wire (not shown) sewn into the damper 10.
[0012]
In the above-described structure, when one electric input is input from the input terminal 11, the
vibration systems 1A and 1B having different diameters vibrate up and down in phase. Therefore,
the air moved by the vibration of the diaphragm (large aperture) 13 disposed below passes
through the perforated frames 16 and 17 to affect the diaphragm (small aperture) 9 disposed
above, and the cabinet The amount of air discharged from the diaphragm 9 to the outside from
the opening 31a of the front baffle 31 of 30 increases. Further, the amount of air corresponding
to the diameter of the diaphragm 13 disposed below is also discharged from the duct 20 and the
opening 32a attached to the back surface baffle 32 of the cabinet 30. Although this does not
change the volume of the substantial cabinet 30, it is equivalent to the increase in volume, and
the bass is enhanced.
[0013]
The space S1 in which the repulsive magnetic circuit type speaker 1 is attached is completely
separated from the space S2 from which the sound is emitted downward from the diaphragm 13
disposed below by the closed tube 33, and thereby the cabinet Within 30, the sounds emitted
from each diaphragm 9 and 13 are such that they do not cancel each other.
[0014]
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4
As described above, in the structure shown in FIG. 1, it is possible to provide high-quality bass in
a small, lightweight, thin cabinet.
In addition, the speaker to be used uses a repulsion type magnetic circuit, and the two vibration
systems share one magnetic circuit, whereby the weight of the field section can be reduced. In
addition, since the voice coil wire is supported by the upper and lower two dampers, good
linearity can be obtained, and high-quality bass with less distortion can be reproduced.
Furthermore, since two vibration systems can be driven by one input, the number of wiring manhours can be reduced and there is a cost advantage.
[0015]
According to the repulsive magnetic circuit type speaker system according to the present
invention, it is possible to provide high-quality bass in a small, lightweight and thin cabinet.
[0016]
Brief description of the drawings
[0017]
1 is a cross-sectional view showing an embodiment of a repulsive magnetic circuit type speaker
system according to the present invention.
[0018]
2 is a cross-sectional view showing an example of a conventional woofer system.
[0019]
3 is a cross-sectional view showing another example of the conventional woofer system.
[0020]
Explanation of sign
[0021]
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5
DESCRIPTION OF SYMBOLS 1 repulsion magnetic circuit type speaker 1A vibration system 1B
vibration system 2 repulsion magnetic circuit 3 magnet 4 magnet 5 center plate 6 holder 7 voice
coil bobbin 8 voice coil 9 diaphragm 9a edge 10 damper 11 input terminal 12 chamber 13
diaphragm 13a edge 14 damper Reference Signs List 15 annular spacer 16 frame 17 frame 18
mounting screw 19 mounting screw 20 duct 30 cabinet 31 front baffle 31 a opening 32 back
baffle 32 a opening
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