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JP2001157291

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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 JP2001157291
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker in which a tweeter unit can be easily detached in a combined type speaker in which a
tweeter unit and a woofer unit are integrated.
[0002]
2. Description of the Related Art Heretofore, a composite type speaker has been used which
achieves good localization by installing a tweeter unit in the center of a woofer unit and can
improve the high frequency range.
[0003]
FIG. 9 is a cross-sectional view showing a conventional composite speaker.
The speaker 130 is composed of a tweeter unit 101, a woofer unit 110, and a tweeter mounting
unit 120 for combining the tweeter unit with the woofer unit. The tweeter unit 101 includes a
frame 102, a diaphragm 103, an edge 104, a voice coil 105, a plate 106, a permanent magnet
107, and a pole piece 108. The plate 106, the permanent magnet 107, and the pole piece 108
constitute a magnetic circuit. A magnetic field generated by the permanent magnet 107 flows
from the plate 106 to the voice coil 105 to the pole piece 108, and a voice signal from an
amplifier (not shown) is transmitted to the voice coil 105 to generate a driving force. The
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diaphragm 103 vibrates by the driving force. In order to transmit an audio signal from the
amplifier to the voice coil 105, the voice coil 105 is connected to a terminal to which the audio
signal is transmitted from the amplifier using a conducting wire.
[0004]
The woofer unit 110 includes a frame 111, a gasket 112, a diaphragm 113, an edge 114, a
damper 115, a voice coil 116, a plate 117, a permanent magnet 118, and a pole piece 119. The
plate 117, the permanent magnet 118, and the pole piece 119 constitute a magnetic circuit.
[0005]
In the conventional composite type speaker, a tweeter mounting unit 120 is used to couple the
tweeter unit 101 and the woofer unit 110. The bottom of the tweeter mounting unit 120 is
coupled (or adhesively fixed) to a pole piece 119 which is a magnetic circuit portion of the
woofer unit 110 using a screw. The tweeter unit 101 is bonded to the upper end of the tweeter
mounting unit 120 by an adhesive. Therefore, it is substantially impossible to detach the tweeter
unit 101 from the woofer unit 110.
[0006]
Also, although a tweeter unit has also been invented as a detachable composite type speaker, a
screw is used to connect the tweeter unit and the woofer unit, and the voice coil of the tweeter
unit uses an electric wire to transmit the audio signal from the amplifier. It is coupled to the
terminal to be transmitted. Therefore, when removing the tweeter unit, it is necessary to remove
the screw and cut the lead. Therefore, it is extremely difficult to detach the tweeter unit 101 from
the woofer unit 110.
[0007]
As described above, it is difficult to detach the tweeter unit in the composite type speaker
conventionally used.
[0008]
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The present invention has been made to solve the above-mentioned conventional problems, and
an object of the present invention is to provide a composite speaker in which the tweeter unit
can be easily detached.
[0009]
SUMMARY OF THE INVENTION A composite speaker according to the present invention
comprises a tweeter unit, a woofer unit, and a combining unit for combining the tweeter unit and
the woofer unit, the tweeter unit having a frame periphery thereof. A portion having a convex
portion, the coupling unit inserting the convex portion into the insertion opening, a locking
portion for locking the inserted convex portion, and the inserted convex portion to the locking
portion A guide groove is provided for guiding, and a pressing portion is provided between the
tweeter unit and the bottom surface of the coupling unit for pressing the tweeter unit so as to
keep the convex portion locked by the locking portion.
[0010]
In a preferred embodiment, the convex portion of the tweeter unit is formed of a conductor, and
the locking portion of the coupling unit includes a terminal fitting electrically connected to the
convex portion.
[0011]
Another embodiment of the present invention includes a tweeter unit, a woofer unit, and a
coupling unit for coupling the tweeter unit and the woofer unit, the coupling unit including a
protrusion on the inner periphery thereof, The tweeter unit has an insertion port for inserting the
protrusion on the outer periphery of the frame, a locking portion for locking the inserted
protrusion, and a guide for guiding the inserted protrusion to the locking portion And a pressing
portion for pressing the tweeter unit between the tweeter unit and the bottom surface of the
coupling unit so as to keep the convex portion locked at the locking portion.
[0012]
In a preferred embodiment, the convex portion of the coupling unit includes a first terminal
fitting, and the locking portion of the tweeter unit includes a second terminal fitting, the first
terminal fitting and the second terminal fitting. And connect electrically.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the composite
speaker of the present invention will be specifically described below, but the present invention is
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not limited to these embodiments.
[0014]
(First Embodiment) FIG. 1 is a cross-sectional view of a composite speaker according to a first
embodiment.
The speaker 30 is composed of a tweeter unit 1, a woofer unit 10 and a coupling unit 20.
The tweeter unit 1 has a frame 2, a diaphragm 3, an edge 4, a voice coil 5, a plate 6, a permanent
magnet 7 and a pole piece 8.
At the outer peripheral portion of the frame 2, a convex portion 9 is provided.
Typically, two convex portions 9 are provided opposite to each other.
The plate 6, the permanent magnet 7, and the pole piece 8 constitute a magnetic circuit.
A magnetic field generated by the permanent magnet 7 flows to the plate 6 to the voice coil 5 to
the pole piece 8, and a voice signal from an amplifier (not shown) flows through the voice coil 5
to generate driving force in the voice coil 5 The vibrating plate 3 vibrates by the driving force.
[0015]
The woofer unit 10 includes a frame 11, a gasket 12, a diaphragm 13, an edge 14, a damper 15,
a voice coil 16, a plate 17, a permanent magnet 18, and a pole piece 19.
A magnetic circuit is constituted by the plate 17, the permanent magnet 18 and the pole piece
19.
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[0016]
Hereinafter, the coupling means of the tweeter unit and the woofer unit will be described. The
combining unit 20 combines the tweeter unit 1 and the woofer unit 10. The coupling unit 20 has
a bowl shape, and the tweeter unit 1 is attached from the opening side. The coupling unit 20 is
attached to, for example, the pole piece 19 of the woofer unit 10 by a screw or the like. FIG. 2 is a
cross-sectional view showing the tweeter unit 1 attached to the coupling unit 20 in the first
embodiment. FIG. 3 is a plan view showing the tweeter unit 1 attached to the coupling unit 20 in
the first embodiment.
[0017]
The coupling unit 20 has an insertion port 21 and a guide groove 22 on its inner circumferential
surface. The insertion port 21 is formed so that the convex part 9 can be inserted. The number of
protrusions 9 and the distance between the protrusions correspond to the number of insertion
holes 21 and the distance between the insertion holes. Therefore, for example, when four
insertion ports are formed in the coupling unit so as to face each other, any tweeter unit having
two or four convex portions can be coupled. The insertion opening 21 is formed wider than the
convex portion 9 so that the convex portion 9 can be inserted without difficulty. The guide
groove 22 is a groove for guiding the convex portion 9 from the insertion port 21 to a locking
portion 23 described later. The vertical width of the guide groove 22 is formed wider than the
vertical width of the convex portion 9 so that the convex portion 9 can pass without difficulty.
The guide groove 22 is formed with a locking portion 23 for locking the convex portion 9. The
locking portion 23 is a recess formed in the upper portion of the guide groove at a
predetermined position, and engages the convex portion 9 and locks the terminal portion 9 by
pressing upward with a pressing portion (described later) in that state. Let The number of the
locking portions 23 and the distance between the locking portions correspond to the number of
the protrusions 9 and the distance between the protrusions.
[0018]
Between the bottom surface of the coupling unit 20 and the tweeter unit 1, a pressing portion 24
for pressing the tweeter unit 1 is provided so that the convex portion 9 can be locked to the
locking portion 23. That is, the coupling unit 20 or the tweeter unit 1 has the pressing portion
24 at the bottom. The pressing portion 24 has elasticity, and is, for example, a spring or the like.
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When the tweeter unit 1 is pushed in, the pressing portion 24 contracts and the elastic force of
the pressing portion 24 acts in the direction of pressing the tweeter unit 1. The convex portion 9
engaged with the locking portion 23 through the insertion opening 21 and the guide groove 22
is also pressed in conjunction, and as a result, the convex portion 9 is firmly locked to the locking
portion 23. Thus, tweeter unit 1 is rigidly coupled to coupling unit 20. Various structures can be
adopted as the structure of the pressing portion 24. The pressing portion 24 is constituted of, for
example, a spring and a support. The support is preferably conical, although any suitable shape
may be employed. By placing a conical support between the tweeter unit 1 and the bottom of the
coupling unit 20 in the direction in which the apex contacts the coupling unit 20, the contact
area can be reduced and the tweeter unit 1 can be rotated more smoothly. It is because Further,
by providing a circular support plate on the tweeter unit side of the spring, it becomes easy to
apply a force to push the tweeter unit 1 further, the appearance when the tweeter unit 1 is
removed is excellent, and dust and dirt can be prevented from entering. Can. Furthermore, the
pressing portion 24 may have elasticity made of resin. FIG. 4 is a cross-sectional view showing a
state in which the pressing unit 24 formed of resin is provided at the bottom of the tweeter unit
1. The tweeter unit 1 can be pressed by providing the pressing portion 24 formed of resin shown
in FIG. 4 at the bottom of the tweeter unit 1.
[0019]
In the preferred embodiment, the coupling unit 20 comprises a terminal fitting 28. The terminal
fitting 28 is attached to the coupling unit 20 such that one end is at the locking portion 23 and
the other end is at the outer peripheral portion of the coupling unit 20. Preferably, the convex
portion 9 is formed of a conductive material, electrically connected to the lead of the voice coil 5,
and has a role as a terminal. FIG. 5 is a plan view in which the tweeter unit is attached to a
coupling unit in which the locking portion 23 has a terminal fitting. The tweeter unit 1 is pushed
up by the elastic force of the pressing portion 24, and the convex portion 9 is locked to the
locking portion 23 and electrically connected to the terminal fitting 28. That is, by coupling the
tweeter unit 1 to the coupling unit 20, the convex portion 9 contacts the terminal fitting 28. An
audio signal is transmitted to the terminal fitting 28 from an amplifier (not shown). Since the
convex portion 9 is electrically connected to the lead wire of the voice coil 5, the sound signal
from the amplifier is transmitted to the voice coil 5 when the terminal fitting 28 and the convex
portion 9 contact with each other. As described above, since the lead wire of the voice coil 5 and
the terminal fitting 28 are electrically connected without using a lead, it is not necessary to cut
the lead when detaching the tweeter unit 1 from the coupling unit 20. .
[0020]
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Next, a method of attaching and detaching the tweeter unit in the first embodiment will be
described. 6A and 6B are schematic views for explaining the movement of the convex portion 9
in the insertion port 21 to the locking portion 23 when the tweeter unit is attached and detached
in the first embodiment. 6 (a) and 6 (b) are plan views of a portion of the inner circumferential
portion of the coupling unit as viewed from the center.
[0021]
When mounting the tweeter unit 1, as shown in FIG. 6A, the convex portion 9 is inserted into the
insertion opening 21 and the tweeter unit 1 is provided between the tweeter unit 1 and the
bottom surface of the coupling unit 20. The pressing force against the pressing force of the
pressing unit 24 is pushed in (procedure I). The tweeter unit 1 is rotated while being pushed so
that the convex portion 9 is guided to the guide groove 22 (procedure II). After the convex
portion 9 is guided to the guide groove 22, the force for pushing the tweeter unit 1 is maintained
so that the convex portion 9 can pass through the guide groove 22, and the tweeter unit 1 is
rotated. At this time, the upper surface of the convex portion 9 is in contact with the upper
surface of the guide groove 22 by the pressing force of the pressing portion 24 (procedure III).
When the convex portion 9 is guided to the position of the locking portion 23, the convex
portion 9 is pushed up to the locking portion 23. Under the present circumstances, if the force
which pushes tweeter unit 1 is made into zero, convex part 9 will be latched to latching part 23
by pushing pressure of pushing part 24 (procedure IV). Thus, the tweeter unit 1 is coupled to the
coupling unit 20 attached to the woofer unit 10.
[0022]
When detaching the tweeter unit, as shown in FIG. 6B, the procedure (procedure V to procedure
VIII) reverse to that at the time of attachment may be performed.
[0023]
Second Embodiment FIG. 7 is a cross-sectional view of a composite speaker according to a
second embodiment.
As in the first embodiment, the speaker 80 includes the tweeter unit 51, the woofer unit 60, and
the coupling unit 70. The description of the same parts as those of the first embodiment will be
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omitted. FIG. 8 is a cross-sectional view showing a state in which the tweeter unit 51 is attached
to the coupling unit 70 in the second embodiment. The tweeter unit 51 has an insertion port 71
and a guide groove 72 on the outer periphery thereof. The insertion port 71 is formed such that
a projection 59 (described later) of the coupling unit can be inserted. The guide groove 72 is
formed with a locking portion 73 for locking a convex portion 59 (described later) of the
coupling unit, and the guide groove 72 locks the convex portion 59 (described later) of the
coupling unit from the insertion opening 71 Guide to section 73. The locking portion 73 is a
concave portion formed in the lower portion of the guide groove 72 at a predetermined position,
and engages a convex portion 59 (described later) of the coupling unit, and in that state, the
tweeter unit 51 is upward by the pressing portion (described later). The projection 59 (described
later) of the coupling unit is locked by pressing it.
[0024]
The coupling unit 70 couples the tweeter unit and the woofer unit. The coupling unit 70 is
attached to the woofer unit 60 by a screw or the like. The coupling unit 70 has a convex portion
59 at its inner periphery.
[0025]
Between the coupling unit 70 and the bottom surface of the tweeter unit 51, a pressing portion
74 for pressing the tweeter unit 51 is provided so that the convex portion 59 of the coupling unit
can be locked to the locking portion 73. As the pressing portion 74, the same one as that of the
first embodiment can be adopted.
[0026]
In a preferred embodiment, the projection 59 of the coupling unit 70 comprises a first terminal
fitting 78. The first terminal fitting 78 is electrically connected to a lead for transmitting an audio
signal from the amplifier. Furthermore, the locking portion 73 has a second terminal fitting 79.
The second terminal fitting 79 is electrically connected to the lead of the voice coil 55. Therefore,
when the convex part 59 of the coupling unit is engaged with the engaging part 73, the first
terminal fitting and the second terminal fitting are electrically connected. Thus, for the same
reason as in the first embodiment, since the lead wire of the voice coil 55 and the first terminal
fitting 78 are electrically connected without using a lead, the tweeter unit 1 is detached from the
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coupling unit 70. There is no need to cut the lead wire.
[0027]
The method of attaching and detaching the tweeter unit in the second embodiment is the same as
that of the first embodiment. Since the convex portion 59 is provided in the coupling unit 70,
movement of the guide groove 72, the insertion port 71, and the locking portion 73 of the
tweeter unit with respect to the convex portion 59 of the coupling unit may be considered.
[0028]
The operation of the present invention will be described below. According to the first
embodiment, the convex portion 9 is provided to the tweeter unit 1, and the insertion opening
21, the guide groove 22, and the locking portion 23 are provided to the coupling unit 20. The
tweeter unit 1 is mounted on the coupling unit 20 by the convex portion 9 being locked to the
locking portion 23 by the pressing force of the pressing portion 24 provided between the
tweeter unit and the coupling unit bottom surface. Furthermore, when the tweeter unit 1 is
detached from the woofer unit 10, the pressing force of the contracted pressing portion 24
works in the direction of pushing out the tweeter unit 1, so it can be removed extremely easily.
Preferably, the convex portion 9 is formed of a conductive material, electrically connected to the
lead of the voice coil 5, and has a role as a terminal. Further, the coupling unit has a terminal
fitting 28 at the locking portion 23. Therefore, the convex portion 9 and the terminal fitting are
electrically connected by mounting the tweeter unit on the coupling unit. Therefore, when
transmitting the voice signal from the amplifier to the voice coil, it is not necessary to connect
the lead wire of the voice coil 5 and the terminal fitting 28 by a conducting wire. Therefore, when
detaching the tweeter unit 1 from the woofer unit 10, it is not necessary to cut the lead wire and
can be easily detached.
[0029]
According to the second embodiment, the convex portion 59 is provided to the coupling unit 70,
and the insertion port 71, the guide groove 72, and the locking portion 73 are provided to the
tweeter unit 51. Also in such a configuration, the tweeter unit can be attached and detached as in
the first embodiment. Preferably, the convex portion 59 of the coupling unit has a first terminal
fitting 78 to which an audio signal from the amplifier is transmitted, and the locking portion 73
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of the tweeter unit is electrically connected to the voice coil 55. There are two terminal fittings
79. Therefore, by coupling tweeter unit 51 to coupling unit 70, the first terminal fitting and the
second terminal fitting are electrically connected. Thus, for the same reason as the first
embodiment, it is not necessary to cut the lead wire when detaching the tweeter unit.
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