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JPH0795693

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DESCRIPTION JPH0795693
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
composite type speaker constructed by integrating a high-tone speaker and a mid-low-pitch
speaker among speakers used in various audio equipment.
[0002]
2. Description of the Related Art A conventional composite speaker of this type will be described
below with reference to the drawings.
[0003]
FIG. 2 is a half sectional view showing the configuration of a conventional general composite
type speaker, in which a ring-shaped magnet 3 is disposed and coupled between a lower plate 1
with a center pole and a ring-shaped upper plate 2, A magnetic circuit having a uniform gap
magnetic gap 4 is configured.
A frame 5 is coupled to the upper surface of the upper plate 2, and an outer peripheral portion of
a diaphragm 7 coupled to the periphery of the frame 5 with a voice coil 8 fitted in the magnetic
gap 4 is coupled with a gasket 9 together with a voice The middle portion of the coil 8 is
supported by the damper 6 to constitute a mid-low range speaker.
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[0004]
In addition, a speaker for high-pitched sound is coupled to the center axis of this mid-low
frequency speaker via a supporter 10 by a screw 11, and this high-pitched sound speaker
comprises a lower plate 12, a magnet 13, an upper plate 14, a frame 15, and vibration. The plate
16, the damper 17, and the dust cap 18 are configured in the same manner as the abovedescribed mid-low range speaker.
[0005]
FIG. 3 is a half sectional view showing the structure of a composite type speaker in which a
reduction in thickness has been achieved in the prior art, and a ring-shaped magnet 20 and a
ring-shaped plate 21 are connected to the inside of a yoke 19 having a concave cross section.
The magnetic circuit which formed the is comprised.
The frame 23 is coupled to the lower surface of this magnetic circuit, and the periphery of the
diaphragm 25 coupled to the periphery of the frame 23 with the voice coil 24 fitted in the
magnetic gap 22 at the center is coupled to constitute a mid-low range speaker ing.
[0006]
In order to reduce the thickness, the diaphragm 25 has a shape in which the central portion
protrudes from the peripheral portion in the radiation direction of the sound (hereinafter
referred to as a reverse cone type diaphragm).
[0007]
Further, on the central axis of this mid-low range speaker, a high-tone speaker configured in the
same manner as in FIG. 2 is coupled via a screw 26.
[0008]
However, the above-described conventional structure has the following problems.
That is, in the conventional composite type speaker shown in FIG. 2, there is a problem that the
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cost is increased because the supporter 10 and the screw 11 are required when the high-tone
speaker is coupled to the mid-bass speaker.
[0009]
Further, in the conventional composite type speaker shown in FIG. 3, the screw 26 is required
when connecting the high-tone speaker to the mid-low-tone speaker as described above, and the
cost increases as well as the mid-low-tone speaker In spite of reducing the thickness by using an
inverted cone type diaphragm, the high-height speaker is heightened by the part of symbol A
shown in FIG. Had the problem of eliminating the effects of
[0010]
An object of the present invention is to solve such conventional problems, and to provide a
composite speaker that can simultaneously realize thinning and cost reduction.
[0011]
SUMMARY OF THE INVENTION In order to solve the above problems, the composite speaker
according to the present invention comprises a magnetic circuit in which two magnetic gaps of
different sizes are formed concentrically, and the smaller one of the magnetic gaps. A first
diaphragm coupled around a first voice coil to be incorporated and having an outer peripheral
portion coupled to a periphery of a first frame coupled to an upper surface of the magnetic
circuit; And a second diaphragm coupled to the center of the second voice coil coupled to the
periphery of the second frame coupled to the lower surface of the magnetic circuit.
[0012]
[Operation] With this configuration, the magnetic gaps of the mid-low range speaker and the
high-range speaker can be formed on the same plane, so that the height of the entire composite
speaker can be reduced. Not only can it be made possible, but the number of parts can be
reduced to be provided inexpensively and to achieve weight reduction.
[0013]
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a half sectional view showing the structure of the composite speaker according to the
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embodiment. In FIG. 1, reference numeral 27 in FIG. A ring-shaped magnet arranged and coupled
to be embedded between the portions 27 b, and 29 is a ring-shaped plate coupled to the upper
portion of the magnet 28, and the center pole of the yoke 27 is combined by combining them. A
first magnetic gap 30 is formed between the portion 27a and the plate 29, and a second
magnetic gap 31 is formed between the outer wall 27b of the yoke 27 and the plate 29, and two
magnetic gaps 30, 31 of different sizes are formed. The magnetic circuit 32 is provided with the
[0014]
Reference numeral 33 denotes a first diaphragm coupled to a center of the first voice coil 34 to
be fitted into the first magnetic gap 30, and an outer peripheral portion thereof is a peripheral
edge of the first frame 35 coupled to the upper surface of the plate 29. Combined with
Reference numeral 36 denotes a first damper for supporting the middle portion of the first voice
coil 34, and 37 denotes a dust cap coupled to the upper surface of the center of the first
diaphragm 33, thus constituting a high sound speaker There is.
[0015]
Reference numeral 38 denotes a second diaphragm coupled around the second voice coil 39
which fits into the second magnetic gap 31. In order to reduce the thickness, a reverse cone type
diaphragm is employed, and the outer periphery thereof Is coupled to the periphery of the
second frame 40 coupled to the lower surface of the yoke 27, and further coupled to and
supported by the outer surface of the second damper 41 on the back surface of the second
diaphragm 38. The speaker for middle bass is configured.
[0016]
In the composite speaker of the present invention thus configured, it is possible to form two
magnetic gaps 30 and 31 having different sizes in one surface with one magnetic circuit 32, and
for this reason, for example, a high-tone speaker In order to be able to be efficiently arranged in
the height dimension of the mid-low range speaker, it is possible to easily realize a thinning
correspondence with the height dimension as low as possible.
[0017]
In addition, since two speakers can be configured by one magnetic circuit 32, cost reduction and
weight reduction can be achieved by reducing the number of parts.
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[0018]
As described above, in the composite speaker according to the present invention, two magnetic
gaps having different sizes are formed on the same plane by one magnetic circuit, and the
number of parts is reduced. It becomes possible to achieve cost reduction and weight reduction,
and it is possible to exert a great effect as an on-vehicle speaker which is required to have high
performance particularly by downsizing and thinning.
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