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JPH0565198

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Notice
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH0565198
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
thin composite type speaker unit, and in particular, the magnet and the yoke of the high-pitched
speaker unit are disposed on the front side of cone paper of the high-pitched speaker unit. The
present invention relates to a device that reduces the thickness of the entire composite speaker
unit.
[0002]
2. Description of the Related Art A composite in which a low range speaker unit L and a high
range speaker unit H are integrated as a unit that can be conventionally treated as a single unit,
which is excellent in both high-tone characteristics and low-tone characteristics. Speaker units
are known. FIG. 4 is a cross-sectional view showing a right half of a symmetrical cross section of
a voice coil type composite dynamic speaker unit which is an example of the prior art.
[0003]
A composite type unit of this type comprises a speaker unit L for low frequency range and a
speaker unit H for high frequency range. Furthermore, each unit comprises magnets 1, 11; yokes
3, 13; , Voice coils 5 and 15, dampers 6 and 16, cone sheets 7 and 17, and edges 8 and 18,
respectively.
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[0004]
Here, the magnets 1 and 11 are fixed to the yokes 3 and 13, and a magnetic field is formed in the
gap between them.
In the low frequency range speaker unit L, unlike the high frequency range speaker unit H, the
magnet 1 is sandwiched between the yoke 3 and the pole piece 2, and a magnetic field is formed
between the two. Frames 4 and 14 are fixed on the yokes 3 and 13. Cone sheets 7 and 17 are
vibratably attached to the frames 4 and 14 by dampers 6 and 16 and edges 8 and 18, and voices
are formed at the central portions of the cone sheets 7 and 17 and the dampers 6 and 16. The
coils 5 and 15 are fixed. Coils are wound on the side surfaces of the voice coils 5, 15 and this
portion is located in the gap.
[0005]
The high-pitched speaker unit H is disposed in the same direction as the low-pitched speaker unit
L in a nested manner inside the cone of the low-pitched speaker unit L. In the low frequency
range speaker unit L, the outer peripheral portions of the mutual frames are connected by the
bracket 21 to constitute a composite type unit.
[0006]
By the way, also in the high sound range speaker unit H constituting the composite type unit of
this type, the yoke 13 is disposed in series behind the frame 14 in the same manner as the low
sound range speaker unit L. The thickness of the high-pitched speaker unit H was obtained by
adding the thicknesses of the yoke 13 and the frame 14 as it is.
For this reason, when securing the amplitude of the low-range speaker unit L in front of the lowrange speaker unit L, the high-range speaker unit H could not fit inside the cone of the low-range
speaker unit L.
[0007]
Therefore, the bracket 21 also has a shape in which the high-range speaker unit H is disposed so
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as to protrude significantly forward from the front surface of the low-range speaker unit L. As a
result, the entire composite type unit is considerably thicker than the low frequency range
speaker unit L, which requires a large installation space.
[0008]
On the other hand, there has also been proposed a thin unit in which the entire composite unit is
made thin by thinning the frame 14, the cone paper 17 and the damper 16 of the high-pitched
speaker unit H.
[0009]
Certainly, according to this type of thin unit, it is possible to make the entire composite unit thin.
However, in such a thin unit, it is essential to make the cone paper 17 and the damper 16 that
are vibration systems of the high-pitched speaker unit H thin. For this reason, the performance
and the sound quality of the high-range speaker unit H change, and there is a drawback that the
performance and the sound quality of the original combined type unit can not be maintained.
[0010]
The present invention has been proposed to solve the above-mentioned problems of the prior art,
and its object is to reduce the thickness of the composite without changing the vibration system
of each unit constituting the composite type unit. It is in providing a mold unit.
[0011]
SUMMARY OF THE INVENTION In order to achieve the above object, the magnetic circuit
reversal composite type speaker unit of the present invention comprises a speaker unit for low
frequency range and a speaker unit for high frequency range which is a voice coil dynamic type.
The high frequency range speaker unit is disposed coaxially with the low frequency range
speaker unit in front of the low frequency range speaker unit on the sound emitting side, and the
high frequency range speaker unit is arranged in the low frequency range by the first bracket.
The yoke fixed to the outer periphery of the speaker unit for high frequency and the yoke fixed
to the speaker unit for high sound area, and the magnet fixed to this are disposed on the front
side of the cone paper of the speaker unit for high sound area with the gap between them facing
back And the yoke is fixed to the outer periphery of the frame of the high-pitched speaker unit
by the second bracket. The voice coil of the speaker unit is disposed so that the wound portion of
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the coil is located in the gap, and the high-pitched speaker unit and the low-pitched speaker unit
are in the vibration ranges of the voice coils of both units. Are disposed as close as possible, as
long as they do not overlap.
[0012]
In the high sound range speaker unit H constituting the combined type unit of the present
invention, a second bracket which is not included in the conventional combined type unit is
newly provided, and the second bracket is a yoke. Is supported in the conical space in front of the
cone paper.
For this reason, the yoke and the frame are nested in parallel, and the high-range speaker unit H
is thinner than in the prior art by the thickness of the portion of the yoke that is accommodated
in the frame.
[0013]
Even if the amplitude of the low frequency range speaker unit L is secured between the low
frequency range speaker unit L and the low frequency range speaker unit L, the high frequency
range speaker unit H has its front face as conventional. It was possible to arrange it more
backwards.
For this reason, the first bracket can also be shaped so that the high-pitched speaker unit H is
disposed rearward, as in the prior art. As described above, according to the present invention, the
entire composite unit can be thinned.
[0014]
Hereinafter, a magnetic circuit inversion composite type speaker unit as one embodiment of the
present invention will be specifically described with reference to the drawings.
[0015]
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(1) Configuration of Embodiment ... Fig. 1, 2 and 3 Since the configuration of the low range
speaker unit L in this embodiment is the same as that of the prior art, the configuration of the
high range speaker unit H in this embodiment Among the above, points different from the
conventional one will be mainly described.
The same parts as those in FIG. 1 are denoted by the same reference numerals, and the
description will be omitted.
[0016]
【0016】a. Mounting directions and positions of magnets and yokes ... Fig. 1 First, in the
high sound range speaker unit H, the cone 21 of the high sound range speaker unit H with the
magnet 21 and the yoke 23 facing the gap between them backward. In the conical space in front
of the Therefore, most of the yoke 23 is accommodated in the high-pitched speaker unit H. A
constant interval is provided between the yoke 23 and the cone paper 17 in order to secure the
amplitude of the high sound range speaker unit H.
[0017]
【0017】b. Direction of voice coil: FIG. 1 Next, the voice coil 25 is disposed with the coiled
portion thereof facing forward and the bottom surface facing rearward. For this reason, the
wound portion of this coil is located in the gap.
[0018]
【0018】c. Yoke Mounting Structure: FIGS. 1 and 2 Further, the yoke 23 in the present
embodiment is fixed to the outer peripheral portion of the frame 14 of the high sound range
speaker unit H by the second bracket 19. The second bracket 19 is a pair of plate-like members,
each having a bending portion in order to secure the amplitude of the high-pitched range
speaker unit H. One end of the second bracket 19 is attached to the edge of the front surface of
the yoke 23, and the other end is attached to the upper surface of the outer peripheral portion of
the frame 14 of the high sound range speaker unit H.
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[0019]
【0019】d. Mounting structure of high frequency range speaker unit H: FIGS. 1 and 3
Also, the high frequency range speaker unit H is fixed to the outer peripheral portion of the
frame 4 of the low frequency region speaker unit L by the first bracket 22. The first bracket 22 is
a pair of plate-like members, and has a shape in which the low-range speaker unit L is disposed
behind the foremost part. That is, the first bracket 22 has a flat surface for attachment on the
outer periphery side of the low frequency range speaker unit L, and also has a bending portion
for securing the amplitude of the low frequency range speaker unit L, which is the conventional
one. The same as the bracket 21. However, while the conventional bracket 21 is bent forward on
the high sound range speaker unit H side, the first bracket 22 of this embodiment is
characterized in that it is bent backward. One end of the first bracket 22 is attached to the outer
peripheral portion of the frame 14 of the high sound range speaker unit H, and the other end is
attached to the upper surface of the outer peripheral portion of the frame 4 of the low sound
range speaker unit L.
[0020]
(2) Operation and Effect of the Embodiment In the high sound range speaker unit H constituting
the composite type unit of the present embodiment, as described above, the second bracket 19
comprises the yoke 23 and the cone paper 17. Supported in a nested manner in parallel with the
frame 14 on the front side, the high-pitched speaker unit H is thinner than in the prior art by the
amount by which the yoke 23 is accommodated in the frame 14
[0021]
In particular, since the composite unit of this embodiment uses the speaker unit H for a high
sound range which is sufficiently small, the entire yoke 23 is disposed rearward of the foremost
part of the second bracket 19, The high-pitched speaker unit H is effectively thinned.
[0022]
Since the speaker unit H for the high-pitched range can be disposed on the front side more
backward than that of the conventional one, the first bracket 22 also has the speaker unit H for
the high-pitched range as compared to the conventional one. It is shaped to be disposed behind.
In particular, in the present embodiment using a sufficiently small high-pitched speaker unit H,
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the entire high-pitched speaker unit H can be disposed from the foremost part of the first bracket
22 to the rear. The entire mold unit can be effectively thinned.
[0023]
(3) Other Embodiments The present invention is not limited to the above embodiments, but
includes the following other embodiments.
[0024]
The low frequency range speaker unit L is not limited to a cone type, but may be a horn type.
This embodiment has the advantage of eliminating the need for an enclosure when used in a
speaker system.
When the present invention is carried out using the low range speaker unit L which is a horn
type speaker, it is noted that a sound path for the low range speaker unit L is secured around the
high range speaker unit H. Need to
[0025]
The mounting position, shape, number and the like of each bracket can be changed to some
extent. For example, one end of the outer side of the first bracket 22 may be fitted to the rear
side of the outer peripheral portion of the frame 4 of the low frequency range speaker unit L.
This embodiment has the advantage that the high-range speaker unit H can be more firmly
attached to the low-range speaker unit L. Also, the first bracket 22 can be molded integrally with
the frame 14 of the high-pitched speaker unit H. This embodiment is effective in reducing the
number of parts and improving the strength of the mounting portion. Furthermore, the first
bracket 22 and the second bracket 19 can be integrally molded. The second bracket 19 can also
be provided on the yoke 23 side with a mounting surface bent 90 degrees rearward. This
embodiment has the advantage that the mounting area of the yoke 23 is large and it can be
rigidly mounted. The second bracket 19 may be a single bracket having a sufficient length, and
the yoke 23 may be fixed to the rear surface of its central portion. This embodiment has the
advantage of improving the strength of the bracket
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[0026]
The angle of flexing of each bracket can be changed as appropriate, and the flexing can be made
more obtuse, or can be curved without flexing. Moreover, each bracket can also be made into a
rod shape. This embodiment has the advantage of reducing the interference of sound from each
bracket and improving the performance of the speaker unit.
[0027]
In addition, the design of each part can be changed as appropriate. For example, the yoke 23 can
be disposed to fit inside the frame 14, and the high-range speaker unit H can be placed inside the
frame 4 of the low-range speaker unit L.
[0028]
As described above, according to the magnetic circuit reversal composite type speaker unit of the
present invention, the composite type speaker unit can be thinned. In particular, the combined
type unit of the present invention is the one in which only the position and direction of the
magnetic circuit and the mounting method are changed among the high frequency range speaker
units H of the conventional combined type unit. Therefore, it is not necessary to change the
vibration system of any of the high range speaker unit H and the low range speaker unit L, and it
is possible to avoid the change of the performance and the sound quality of the high range
speaker unit H. Therefore, according to the present invention, it is possible to solve the
drawbacks of the prior art that the performance and sound quality of the original combined unit
can not be maintained while realizing thinning of the combined unit.
[0029]
From the above, according to the magnetic circuit reversal composite type speaker unit of the
present invention, it is possible to make the composite type unit thinner and save the installation
space and storage space while maintaining the performance and the sound quality. Further,
according to the composite type unit of the present invention, only the high frequency range
speaker unit H does not protrude forward from the composite type unit, so that a speaker having
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a smooth surface and an excellent appearance can be manufactured.
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