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DESCRIPTION JP2015522230

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DESCRIPTION JP2015522230
Abstract: A multi-driver converter comprising a symmetrical magnetic circuit and a symmetrical
coil circuit, wherein the double magnetic gap and the double coil are formed by circular or
annular spacers made of one or more nonmagnetic materials. Two or more sets of drive units 01
and / or 02 are coupled to one magnetic core. Between the inner peripheral surface or the outer
peripheral surface of one or two annular cylindrical yokes attached to the open annular
cylindrical thin wall of the bracket and the vertical outer peripheral surface of the upper
electrode plate and lower electrode plate of the magnetic core Forming four or more coaxial and
equal diameter annular magnetic gaps and inserting four or more coaxial and equal diameter
coils, coil winding direction and connection method and necessary techniques By predetermining
the target characteristics, a multi-driver transducer is constructed having one or more pairs of
repelling magnets, symmetrical magnetic circuits and symmetrical coil circuits. When the
converter is in operation, the counter electromotive force due to electromagnetic induction and
the inductance are canceled out, so that the converter has a characteristic similar to that of a
resistive load or a resistive load characteristic, and also has high sensitivity and high analytical
power. It has high reproducibility. [Selected figure] Figure 6
Multi-driver converter with symmetrically arranged magnetic circuit and coil circuit
[0001]
The present invention relates to a multi-drive transducer, in particular to a multi-drive transducer
having repulsive magnets, symmetrical magnetic circuits and symmetrical coil circuits, in the
field of electroacoustic transducers and electromechanical transducers which are electrical.
Belongs.
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[0002]
A multi-driver converter that has magnets that repel each other to constitute a moving coil
converter in which there is only one magnetic gap and one coil in the conventional
electroacoustic transducers and electromechanical transducers that become mainstream The
device is a two or more moving coil multi-driver transducer composed of two or more magnetic
gaps, two or more coils.
[0003]
Multi-driver transducers having repelling magnets are prior art.
As an example, the technical solutions proposed by the present inventors such as PCT / CN98 /
00306, PCT / CN2008 / 072668, PCT / CN2009 / 070507, CN99114781.2, TW88109796, etc.
have movable pair or pair of repelling magnets. The coil type multi-driver electric speaker has
been released.
In addition, JP09322294A proposed a three-driver technology scheme having a pair of repulsive
magnets, three magnetic gaps, and three coils. In those technical schemes, the converters as an
advantage have high efficiency and strong driving power, and as the disadvantages these
converters still have inductive load characteristics and back electromotive force, so the
converters are especially heavy bass speakers And sub-wafers have large total harmonic
distortion, and it is difficult to meet the Chinese national standard of total harmonic distortion
(THD + N) at 1 W / 1 m ? 6%, often 10% to 13%. Or more.
[0004]
The first object of the present invention is to overcome the drawbacks of the prior art and the
technical bias of the electro-acoustic art, and filed by the present inventor CN200610020317.7,
PCT / CN2008 / 072668, US2005 / 0099255A1, CN200510091936 Two sets of symmetrical
magnetic circuits and symmetrical coil circuits mounted on a transducer or speaker having
characteristics similar to the resistive load characteristics or resistive load characteristics
described in, for example, C.0, CN200810169693.1, PCT / CN2009 / 070507, etc. Use this to
construct a transducer with a pair of repulsive magnets and four drivers. In each of the four sets
of symmetrical magnetic circuits and symmetrical coil circuits of the converter, the symmetrical
magnetic circuit and symmetrical coil circuit form the inductance and the back electromotive
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force (Back Electromotive Force) of the converter coil circuit itself every other group. Because it
can be offset, the four driver converter will obtain strong driving force and high efficiency, and at
the same time achieve an unprecedented improvement of total harmonic distortion, THD + N ?
3%, and speaker Hi-Fi The standard has been reached.
[0005]
The second object of the present invention is to overcome the disadvantages of the prior art and
the technical bias of the electro-acoustic technology field, and to the resistive load characteristic
or resistive load characteristic described in the above technical solution filed by the present
inventor. Using six or more separately mounted two sets of symmetrical magnetic circuits and
symmetrical coil circuits mounted on a transducer or speaker having similar characteristics, a
pair or more of repelling magnets Construct a converter with six drivers or more even drivers.
This makes it possible to obtain strong driving power and high efficiency by the 6 / or 8 / or 10
driven transducers and simultaneously achieve an unprecedented improvement in total harmonic
distortion, and the THD + N probability is ? 3. % To work to reach the Hi-Fi standard.
[0006]
The third object of the present invention is to overcome the drawbacks of the prior art and the
technical bias of the electro-acoustic technology field, and to provide a large driving force while
greatly increasing the linear stroke of the speaker 2 Lowering the Fo of a small aperture speaker,
such as ~ 3 inches, to lower frequencies to get a great bass effect.
[0007]
In order to achieve the object of the present invention, a multi-driver transducer comprising a
symmetrical magnetic circuit and a symmetrical coil circuit comprises a magnetic circuit and a
frame and a bracket integrally connected thereto, a coaxially equal-diameter magnetic gap and a
magnetic gap The coil skeleton reciprocates by including a coil skeleton to be inserted, a coil
formed by electric wires which are coiled in parallel and coil insulation, a coil skeleton and a
vibrating membrane / or a flat diaphragm connected to at least one damper. A sound is produced
by vibrating a vibrating membrane or a flat vibrating plate, or a sound pressure change of the
sound is detected through the vibrating membrane, and an audio signal is sensed and obtained
by a coil, and the frame is not A frame made of a magnetic material / or the frame and the
bracket are fused to form an integrated structure The magnetic circuit comprises two coaxially
mounted upper and lower pole plates, the two pole plates having uniform thickness and
projected area to match the permanent magnet, The upper core plate and the lower pole plate
are connected by an axially magnetized permanent magnet having a uniform thickness of 1 sheet
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or more than 1 sheet to form the whole magnetic core, and a plat made of a nonmagnetic
material Providing an inwardly projecting circular platform at its axial location, said circular
platform having a smooth and neat vertical outer peripheral surface, providing an annular groove
on the outside of said vertical outer peripheral surface, and a bottom of said annular groove Two
or more of the permeable air holes are evenly arranged, and the outer side of the annular groove
is the open annular cylindrical thin wall of the bracket, and the axial height side with respect to
the inner peripheral surface of the annular thin wall or its tip is smooth Correct horizontal
position And a flange extending outward at the tip of the annular thin wall of the bracket and
connected to the frame according to the frame, the upper electrode plate, the permanent magnet
and the lower electrode plate An annular cylindrical yoke which is adhesively fixed to the axial
center portion of the surface of the circular platform and coaxially mounted to the upper
electrode plate, the permanent magnet and the lower electrode plate is fitted to the inner
peripheral surface of the annular cylindrical thin wall of the bracket. Attached and / or
adhesively fixed, bonded and / or combined fixed to the vertical positioning surface and the
horizontal positioning surface, and fitted into the circular shaft hole at the bottom of the bracket
at the other end to connect to the bracket or Bonding and fixing, the two horizontal end faces of
the annular cylindrical yoke have a height in the axial direction higher than that of the outer
magnetic pole surfaces of the upper electrode plate and the lower electrode plate with an H value
of 0.5 to 20 mm. The Two link-shaped magnetic gaps of equal diameter are formed coaxially
between the inner peripheral surface of the annular cylindrical yoke and the vertical outer
peripheral surface of the upper electrode plate and the lower electrode plate, and coaxial with
the league magnetic gap By inserting two coils of equal diameter and predetermining the winding
direction of the two coils and the current direction to flow the coils, the coils are aligned in the
same direction at the same operation moment to generate an electromotive force F, the
permanent The axial height of the magnet is bisected equally divided line X---Y axis line as
horizontal symmetry axis, central axis line Y---Y axis line of the upper electrode plate, permanent
magnet and lower electrode plate is vertical symmetry axis The double magnetic gap double coil
drive unit 01 has two sets of magnetic circuits showing left-right symmetry and top-bottom
symmetry in geometrical shape and magnetic characteristics, and left-right symmetry and topbottom symmetry in geometrical shape and electrical characteristics Showing two sets of coils It
has a path, and connecting two of the coils in series reverses the winding direction of the wire,
the wire cross-sectional area of the two coils, number of turns, number of turns, resistance,
inductance, absolute value, and winding time It is determined in advance that the tensions of all
the two coils are equal, and the inductance of the two coils and the back electromotive force
sensed during reciprocating motion are offset because the phase angle is 180 degrees, so that
the resistive load characteristics are obtained. Or the first set of double magnetic gap double coil
in-coil magnetic drive unit 01 having characteristics similar to the resistance load characteristic,
and the outer surface of the lower plate of the first set of double magnetic gap in-double coil
magnetic drive unit 01 A circular and / or toroidal spacer of appropriate thickness and made of
nonmagnetic material coaxial with the other, and the opposite surface of said circular / or
toroidal spacer By adhesively fixing to the lower electrode plate of the second set of double
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magnetic gap double coil drive units 01 of the converter, two sets of double magnetic gap double
coil drive units 01 utilizing the repulsive force of the magnet are configured, thereby The second
set of double magnetic gap double coiled double sided circular / annular spacer of suitable
thickness made of nonmagnetic material coaxially on the outer surface of the upper plate of the
magnetic drive unit 01 in double coil, The first set, the second set, the third set, etc. are then
adhesively fixed to the upper surface of the third set of double magnetic gap double coil drives of
said transducer on the opposite surface of the circular / or annular spacer. ииииииииииииииииииии Double
magnetic gap double coil drive unit 01 makes the central axis Y ? ? ? Y axis of one vertical
symmetry axis, same frame as the same coil skeleton and the same bra , The same annular
cylindrical yoke, the circular / or annular spacer of the same geometrical shape size, four / or six
or more of the ring-shaped magnetic gaps and four / or six to set By providing the abovedescribed coil, an internal magnetic multi-driver conversion having high sensitivity, high analysis
power and high reproducibility, having one or more repelling magnets, a symmetrical magnetic
circuit, and a symmetrical coil circuit. Configure the
[0008]
A multi-driver converter comprising a symmetrical magnetic circuit and a symmetrical coil circuit
comprises a magnetic circuit and a frame and a bracket integrally connected to the magnetic
circuit, a coaxial coaxial cable of equal diameter and a coil skeleton inserted in the coil, and a coil
skeleton in parallel. Oscillating the diaphragm or planar diaphragm by reciprocating movement
of the coil skeleton, including a coil constituted by an electrical wire which is insulated from one
another, a diaphragm and / or a planar diaphragm connected to the coil skeleton and at least one
damper To make a sound, or to detect a change in sound pressure of the sound through the
diaphragm, and to sensitize an audio signal by a coil, and the frame is made of a nonmagnetic
material / or the frame and the bracket And the magnetic circuit is coaxially mounted. Two upper
and lower electrode plates provided with at least one central axial hole, the two plates having a
uniform thickness and a projected area, and matching with the permanent magnet, The upper
electrode plate and the lower electrode plate are connected by an axially magnetized permanent
magnet having an annular shape and / or one or more uniform thicknesses for providing a
central axial hole to constitute the entire magnetic core, A platform made of a material, and
provided with a circular platform projecting inward at its axial center, and the circular platform is
provided with a central axial hole to be fitted to the upper electrode plate, the permanent magnet
and the lower electrode plate, the circular platform is smooth And an annular groove is provided
on the outer side of the vertical outer peripheral surface, and two or more permeable air holes
are evenly arranged at the bottom of the annular groove, the outer side of the annular groove
being the bracket Thin open cylinder Provide a smooth and neat horizontal positioning surface
and a vertical positioning surface at the axial height side or the tip with respect to the inner
circumferential surface of the annular thin wall, and spread outward at the tip of the annular thin
wall of the bracket Of the circular platform of the bracket through the at least one central axial
hole in the upper plate, the permanent magnet and the lower plate. An annular cylindrical yoke
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which is firmly adhered to the axial center portion and coaxially mounted to the upper electrode
plate, the permanent magnet and the lower electrode plate is fitted in the inner peripheral
surface of the annular cylindrical thin wall of the bracket and / or mounted Bonded or fixed to
the vertical positioning surface and the horizontal positioning surface by bonding and / or
combined and fixed to the circular shaft hole at the bottom of the bracket at the other end.
Connected to the bracket or adhesively fixed, the two horizontal end faces of the annular
cylindrical yoke have an H value of 0.5 to 20 mm on the axial height side from the outer pole
surface of the upper electrode plate and the lower electrode plate To form two link-shaped
magnetic gaps of equal diameter and coaxial between the inner peripheral surface of the annular
cylindrical yoke and the vertical outer peripheral surface of the upper electrode plate and the
lower electrode plate; The coil is aligned in the same direction at the same operation moment to
generate an electromotive force F by inserting two coaxial coils of equal diameter in the same
magnetic gap and predetermining the winding direction of the two coils and the current direction
to flow the coil. The axial height of the permanent magnet is equally divided into two equal lines
X--X axis is a horizontal symmetry axis, and the central axis Y --- Y of the upper electrode plate,
the permanent magnet and the lower electrode plate The axis is a vertical symmetry axis, and the
double magnetic gap Bull coil drive unit 01 has two sets of magnetic circuits showing left-right
symmetry and top-bottom symmetry in geometrical shape and magnetic characteristics, and two
sets of coils showing left-right symmetry and top-bottom symmetry in geometrical shape and
electrical characteristics It has a circuit, and connecting two of the coils in series reverses the
winding direction of the wire, the wire cross-sectional area of the two coils, the number of turns,
the winding width, the resistance, the absolute value of the inductance, and when winding It is
determined in advance that the tensions of all the two coils are equal, and the inductance of the
two coils and the back electromotive force sensed during reciprocating motion are offset because
the phase angle is 180 degrees, so that the resistive load characteristics are obtained. Or a first
set of double magnetic gap double coil magnetic drive units 01 having characteristics similar to
resistive load characteristics, and the first set of double magnetic gap double coils Attaching to
the outer electrode surface of the lower electrode plate of the drive unit 01 a circular / or
annular spacer having a suitable thickness and made of nonmagnetic material coaxially, the
conversion to the opposite surface of the circular / or annular spacer Of the second set of double
magnetic gap double coil drive of the second unit by adhesive bonding, double magnetic gap
double coil drive 01 using the repulsive force of the magnet is configured in two sets, Double
magnetic gap double coil A double circular / orroidal spacer of suitable thickness made of
nonmagnetic material coaxially attached to the outer surface of the top plate of the magnetic
drive 01 in double coil is said double circular or / or The first set, the second set, and the third
set of the third set of double magnetic gap double coil drive units 01 of the converter are
adhesively fixed to the opposite surface of the annular spacer by adhesive bonding. ...... Double
magnetic gap double coil drive section 01 is a central axis Y --- Y axis of the single vertically
symmetrical axis, the same said coil skeleton equal the frame and the bracket, the same said ring
cylinder By providing a Yoke-like yoke, said circular / or toroidal spacer of the same geometrical
shape size, 4 / or 6 or more of said ring-like magnetic gaps and 4 / or 6 or more of said coils
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being set An internal magnetic multi-driver transducer having high sensitivity, high analytical
force and high reproducibility, having one or more repelling magnets, a symmetrical magnetic
circuit, and a symmetrical coil circuit.
[0009]
A multi-driver converter comprising a symmetrical magnetic circuit and a symmetrical coil circuit
comprises a magnetic circuit and a frame and a bracket integrally connected thereto, a coaxial
magnetic cable of equal diameter and a coil skeleton inserted into the coil, and a coil skeleton in
parallel. By vibrating the vibrating membrane or the flat diaphragm by the reciprocating motion
of the coil skeleton, including a coil constituted by electric wires which are insulated from one
another, a vibrating membrane / or a flat diaphragm connected to the coil skeleton and at least
one damper A sound is produced, or a change in sound pressure of the sound is detected through
the diaphragm, and an audio signal is sensed by a coil.
[0010]
The frame is a frame made of a nonmagnetic material or a frame integrally formed by combining
the frame and the bracket, and the magnetic circuit comprises two upper and lower plates
attached coaxially. The two plates have a uniform thickness and projected area to match the
permanent magnet, and have two rings and / or one or more equal thicknesses axially
magnetized. The upper plate and the lower plate are connected by a permanent magnet to form
the whole magnetic core, and the platform is made of nonmagnetic material, and a circular
platform projecting inward is provided at the axial center portion, and the circular platform And
the circular platform has a smooth and neat vertical outer peripheral surface, and the vertical
outer peripheral surface is provided with an annular groove, and the permeable air hole is
provided at the bottom of the annular groove. Two or more are equally disposed, and the outer
side of the annular groove is the horizontal positioning surface of the bracket and the thin wall of
the opening cylindrical body, and the vertical positioning surface is provided on the axial height
side with respect to the inner circumferential surface of the annular thin wall; There is a flange
which spreads out at the tip of the annular thin wall of the bracket and connects to the frame,
and the upper electrode plate, permanent magnet and lower electrode plate are embedded in the
inner peripheral surface of the cylindrical thin wall of the bracket The annular cylindrical yoke
coaxially attached to the upper electrode plate, the permanent magnet and the lower electrode
plate is fitted and attached / fixed to the cylindrical body projecting inside the bracket. Are
positioned horizontally on the surface of the circular platform, and the two horizontal end faces
of the annular cylindrical yoke are 0.5 to 20 mm from the outer pole surface of the upper and
lower plates on the axial height side. H value Two link-shaped magnetic gaps of equal diameter
are formed coaxially between the outer peripheral surface of the annular cylindrical yoke and the
vertical outer peripheral surface of the upper electrode plate and the lower electrode plate. By
inserting two coaxial coils of equal diameter in the gap and predetermining the winding direction
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of the two coils and the current direction to flow the coils, the coils are aligned in the same
direction at the same operating moment to produce an electromotive force F The axial height of
the permanent magnet is divided into two equal parts, the X-axis is a horizontal symmetry axis,
and the central axis Y--Y axis of the upper electrode plate, the permanent magnet and the lower
electrode plate is Vertically symmetrical axis, the double magnetic gap double coil drive unit has
two sets of magnetic circuits showing left-right symmetry and top-bottom symmetry in
geometrical shape and magnetic characteristics, and left-right symmetry in geometrical shape
and electrical characteristics And two pairs showing up and down symmetry Having an coil
circuit, and connecting the two coils in series has the opposite winding direction of the wire, the
wire cross-sectional area of the two coils, the number of turns, the winding width, the resistance,
the absolute value of the inductance, and winding It is determined in advance that the tensions at
the time are all equal, and the inductance of the two coils and the Back Electromotive Force
sensed during reciprocation are offset by the phase angle being 180 degrees so that the resistive
load A first set of double magnetic gap double coil external magnetic drive unit 02 having a
characteristic or a characteristic similar to a resistance load characteristic, comprising the outer
electrode surface of the lower electrode plate of the first set of double magnetic gap double coil
drive unit 02 A circular / ring-shaped spacer of suitable thickness made of non-magnetic material
coaxial with the other side of the circular / ring-shaped spacer By bonding to the lower pole plate
of the second set of double magnetic gap double coil drive units 02 of the converter on the
surface, two sets of double magnetic gap double coil drive units using the repulsive force of the
magnet are configured, By double attaching a circular / annular spacer of suitable thickness
made of nonmagnetic material coaxially to the outer surface of the upper plate of the magnetic
drive in the second set of double magnetic gap double coils according to The first set, the second
set, the third set are then adhesively fixed to the opposite surface of the circular / or toroidal
spacer with the upper plate of the second set of double magnetic gap double coil drives 02 of the
third set of transducers. иииииииииииииииииииииииииииииииииииииииииииииииииииииииии Double magnetic gap Double coil drive unit
02 sets the central axis Y ? ? ? Y of one line as a vertical symmetry axis, the same frame and
bracket as the same coil skeleton , The same annular cylindrical yoke, the circular / or annular
spacer of the same geometrical shape size, four / or six or more of the ring-shaped magnetic gaps
and four / or six to set By providing the above-described coil, an external magnetic multi-driver
conversion having high sensitivity, high analysis power and high reproducibility, having one or
more repelling magnets, a symmetrical magnetic circuit, and a symmetrical coil circuit. It is
[0011]
In a multi-driver converter comprising a symmetrical magnetic circuit and a symmetrical coil
circuit, the nonmagnetic material coaxially adhesively fixed to the outer flat surface of the lower
plate of the two sets of double magnetic gap double coil drive 01 / or 02 In the two sets of
double magnetic gap double coil drive units 01 and / or 02 having circular and / or annular
spacers configured by the above, which exhibit repulsive magnetic properties, two that exhibit
left-right symmetry and top / bottom symmetry in magnetic properties It has a thickness that can
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ensure that it has a pair of magnetic circuits and two sets of coil circuits that show left-right
symmetry and top-bottom symmetry in geometry and electrical characteristics.
[0012]
In a multi-driver converter comprising a symmetrical magnetic circuit and a symmetrical coil
circuit, said annular cylindrical yoke is coaxial with said vertical axis of symmetry Y---Y and has
an equal diameter of two stages / or two or more stages in the axial direction Bonded in one
whole with an annular cylindrical yoke of equal height and with a circular and / or annular
spacer made of one / or more nonmagnetic material of suitable thickness.
[0013]
In a multi-driver converter comprising a symmetrical magnetic circuit and a symmetrical coil
circuit, for distributing heat from the magnetic circuit and coil circuit to the ring groove of the
bracket and reducing the damping of the transducer vibration system. If the permeable air holes
are provided and the dimensions and structural strength of the bracket allow, the projected area
of all the permeable air holes is as large as possible, and both the circular center and the center
line of the permeable air holes are the coil skeleton / Alternatively, it is provided on the
circumference of the projection relationship of the coaxial and equal diameter coils, and the
transducer vibration system holds the left / right symmetry of the coil circuit when it vibrates up
and down.
[0014]
In a multi-drive transducer comprising a symmetrical magnetic circuit and a symmetrical coil
circuit, a flange is provided at the bottom of the bracket, and the flange is connected and fixed to
one end of a frame made of a nonmagnetic material; A flange larger than the diameter of the
damper is provided at the other end, and an inward projecting platform is provided at an axial
center portion of the large flange, and an inward projecting cylindrical body is provided at the
axial center portion; A damper is adhesively secured to the annular platform of the frame,
forming a coaxial, equal-diameter, ring-shaped magnetic gap, by fitting or adhesively fixing a
cylindrical yoke to the inward projecting cylindrical body of the flange. The cooling and
ventilation space is evenly provided on the frame and the flange.
[0015]
<Beneficial effect of the present invention>
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Excellent energy saving characteristics.
With the aid of the symmetrical magnetic circuit according to the invention and the symmetrical
coil circuit multi-drive principle, it is possible to eliminate the back electromotive force of the
converter with a huge axial thrust and at the same time an output sound pressure SPL that is
very effective for speakers, especially bass speakers and sub-wafers. You get the value.
[0016]
??
In order to eliminate the inductance and back electromotive force generated in the symmetrical
coil circuit of the speaker by the symmetrical magnetic circuit and the symmetrical coil circuit
principle described in the present invention, the total harmonic distortion THD of the bass
speaker and the sub-wafer is a precedent example. Improved.
For example, a bass speaker that is four drivers 5.25 inches configured according to the
principles described in the present invention has SPL ? 90.2 dB / 1 w / 1 m, THD + N ? 1.8%,
for a resonant frequency Fo = 50 Hz.
[0017]
Hi-Fi can be realized for the first time on 3.2.1 channel and 4.1 channel speakers.
[0018]
??
Since the converter has a good cooling chamber and a heat dissipation exhaust system before
and after the magnetic circuit, the speaker's instantaneous response function and output
compression can be greatly improved.
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[0019]
??
It is conceivable that the huge axial thrust according to the multi-drive principle according to the
invention leads to a functionally significant new breakthrough in the moving-coil
electromechanical transducer.
[0020]
FIG. 1 shows a longitudinal sectional view of a first prior art example and its improvement plan.
FIG. 2 shows a longitudinal sectional view of a second prior art example and its improvement
plan.
FIG. 3 shows a longitudinal sectional view of an inner magnetic multi-driver converter
embodiment 1 according to the invention.
FIG. 4 shows a longitudinal sectional view of an inner magnetic multi-driver converter
embodiment 2 according to the invention.
FIG. 5 shows a longitudinal sectional view of an inner magnetic multi-driver converter
embodiment 3 according to the invention. FIG. 6 shows a longitudinal sectional view of the
external magnetic multi-driver converter embodiment 1 according to the present invention. FIG.
7 shows a longitudinal cross-sectional view of an extra-magnetic multi-driver converter
embodiment 2 according to the invention. FIG. 8 shows a longitudinal sectional view of the third
embodiment of the outer magnetic multi-driver converter described in the present invention. FIG.
9 shows a longitudinal sectional view of an extra-magnetic multi-driver converter embodiment 4
according to the invention.
[0021]
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The correspondence between the main parts described in the present invention and the reference
symbols is shown as follows. 103A-603A: upper electrode plate 103B-603B: lower electrode
plate 101-601: frame 1013-6013: screw connecting frame and bracket 1871-2871: open
cylindrical body 181-681: bracket 133-633: with recessed portion Joint surface 102-602:
Permanent magnet 106-606: Vibrating film / planar diaphragm 199-699: Edge 141-641:
Damper 105-605: Dustproof cap 107-607: Coil skeleton 109-609 (A / B): Coil 110-610 (A / B):
ring-shaped magnetic gap 164-663: ring-shaped groove 111-611: platform surface projecting
inward 112-612: cylindrical body projecting inward 11200-61200: cylindrical body projecting
inward Ring-shaped joint surface 113-613: ring Cylindrical yoke 1118-6118: Platform projecting
inward of bracket 1810-6810: Horizontal positioning surface of bracket cylindrical thin wall
1820-6820: Vertical positioning surface of bracket cylindrical thin wall 182-682: Permeable air
holes 1020, 2020 : Nonmagnetic circular / or annular spacer 1021, 2021: nonmagnetic circular
/ or annular spacer 1710-6710: nonmagnetic material fastener 172-672: nonmagnetic retainer
plate 175-675: nonmagnetic nut 170-670: concave shaft hole
[0022]
FIG. 1 shows a longitudinal sectional view of a first prior art example and its improvement plan.
[0023]
It is sectional drawing (The coil 109 and the coil skeleton 107 are included) which shows the
magnetic core part of FIG. 6 Example described in PCT / CN2008 / 072668 disclosed by the
present inventor.
The upper electrode plate 103A and the lower electrode plate 103B have the same thickness, the
same projected area, and are coaxially mounted disk-like flat plates, and the neodymium magnet
102 to be a set is the upper electrode plate 103A and the lower electrode plate 103B. Bonded
between the two, ..., the annular cylindrical yoke 113 is set at the axial center portion of the
magnetic core, and so on, the inner peripheral surface of the element 113 and the outer
peripheral surface perpendicular to the elements 103A and 103B The two coils 109A and 109B
coaxially mounted with the coil skeleton 107 are inserted into the ring-shaped magnetic gap so
that the coil 109A rotates clockwise. In advance, it is predetermined that the coil 109B is
counterclockwise (inversely, the same). In addition, it is previously determined that the wire
cross-sectional areas of the coil 109A and the coil 109B are equal to each other in the number of
turns, the number of turns, the winding width, the resistance, the absolute value of the
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inductance, and the tension at the time of winding. When they are connected in series as shown
in FIG. 12, they become one coil. The axis height of the upper electrode plate 103A and the lower
electrode plate 103B and the axis height of the coil winding width are equally divided into two
equally divided lines Z---Z axis as a horizontal symmetry axis, and the axis height of the
permanent magnet 102 is equally divided into two. Two sets of geometrical shapes and magnetic
characteristics with vertical symmetry with the Y--Y axis of the element 103A, element 102 and
element 103B as the horizontal symmetry axis with the equidistant X--X axis as the horizontal
symmetry axis and with vertical symmetry A magnetic circuit showing left-right symmetry and a
coil circuit showing up-down symmetry and left-right symmetry in geometrical shape and electric
characteristic are formed. Thus, the absolute values of the inductances of the two coils 109A and
109B of the present embodiment and the back electromotive force sensed during reciprocating
motion are offset because the phase angle is 180 degrees. This embodiment shows a pair of
double magnetic gap double coil in-circuit magnetic transducer drive units 01 having high
resistance, high analytical force, and high reproducibility having characteristics similar to the
resistance load characteristics or resistance load characteristics. . For further detailed description,
please refer to PCT / CN2008 / 072668 FIG. 6, FIG. 9 to FIG. 12, FIG. 20, FIG. 21 and CN
2005100919396.0 disclosed in the present inventor and US 2005/0099255 A1.
[0024]
In order to obtain the characteristics of the symmetrical magnetic circuit and the symmetrical
coil circuit described in the prior art such as PCT / CN2008 / 072668 even during operation, the
present invention presents a new improvement solution to the above prior art I think that there
is a difference. The upper electrode plate 103A and the lower electrode plate 103B, and the coil
height of the coil 109A and the coil 109B are set at the same horizontal symmetry axis by setting
the same horizontal symmetry axis as the bisecting Z--Z axis. An embodiment of the present
invention can obtain a magnetic circuit that is optimum for vertical and horizontal symmetry and
coil circuit characteristics that are vertical and horizontal symmetry.
[0025]
FIG. 2 shows a longitudinal sectional view of a second prior art example and its improvement
plan.
[0026]
It is sectional drawing (The coil 209 and the coil skeleton 207 are included) which shows the
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magnetic core part of FIG. 5 Example described in PCT / CN2008 / 072668 disclosed by the
present inventor.
The upper electrode plate 203A and the lower electrode plate 203B have the same thickness, the
same projected area, and are coaxially mounted toroidal flat plates, and the neodymium magnet
202 as a set is the upper electrode plate 203A and the lower electrode plate 203B. Bonded
between the two, ..., the annular cylindrical yoke 213 is set at the axial center portion of the
magnetic core, and so on the outer peripheral surface of the element 213 and the vertical outer
peripheral surface of the elements 203A and 203B. The two coils 209A and 209B coaxially
mounted with the coil skeleton 207 are inserted into the ring-shaped magnetic gap in a ringshaped magnetic gap 210A and 210B which are coaxial and equal in diameter, and the coil 209A
rotates clockwise. , And predetermine that the coil 209B turns counterclockwise (and vice versa).
In addition, it is previously determined that the wire cross-sectional areas of the coil 209A and
the coil 209B are all equal in winding number, winding width, resistance, absolute value of
inductance, and tension at winding. When they are connected in series as shown in FIG. 12, they
become one coil. Then, the axis height of the upper electrode plate 203A and lower electrode
plate 203B and the axis height of coil winding width equally divided line Z---Z axis line as
horizontal symmetry axis, axial height of the permanent magnet 202 is equally divided into two.
Two sets of geometrical shapes and magnetic properties with vertical symmetry axis of the
element 203A, element 202 and element 203B with the horizontal line of symmetry as the
equipartition line X---X axis and vertical symmetry with the magnetic property A magnetic circuit
showing left-right symmetry and a coil circuit showing up-down symmetry and left-right
symmetry in geometrical shape and electric characteristic are formed. Thus, the absolute values
of the inductances of the two coils 209A and 209B of this embodiment and the back
electromotive force sensed during reciprocating motion are offset because the phase angle is
180 degrees. The present embodiment shows a pair of double magnetic gap double coil out-ofcircuit magnetic converter driving unit 02 having a resistive load characteristic or a
characteristic similar to the resistive load characteristic and having high sensitivity, high
analytical force and high reproducibility. . For further details, please refer to the explanatory
notes written in PCT / CN2008 / 072668 Fig. 5, Fig. 9 to Fig. 12, Fig. 20, Fig. 21 and
CN200610020317.
[0027]
In order to obtain the characteristics of the symmetrical magnetic circuit and the symmetrical
coil circuit described in the prior art such as PCT / CN2008 / 072668 even during operation, the
present invention presents a new improvement solution to the above prior art I think that there
is a difference. The upper electrode plate 103A and the lower electrode plate 103B, and the coil
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height of the coil 109A and the coil 109B are set at the same horizontal symmetry axis by setting
the same horizontal symmetry axis as the bisecting Z--Z axis. An embodiment of the present
invention can obtain a magnetic circuit that is optimum for vertical and horizontal symmetry and
coil circuit characteristics that are vertical and horizontal symmetry.
[0028]
FIG. 3 shows a longitudinal sectional view of an inner magnetic multi-driver converter
embodiment 1 according to the invention.
[0029]
An embodiment of an internal magnetic four-driver loudspeaker comprising a symmetrical
magnetic circuit and a symmetrical coil circuit, but with two coaxially mounted upper plate 103A
and lower plate 103B, the two said plates having the same thickness and the same projection The
top plate 103A and the bottom plate 103B are brought together by an axially magnetized
neodymium magnet 102 which has an area and is evenly distributed with one or more uniform
thicknesses according to the permanent magnet 102 Bond to form a magnetic core.
Two identical magnetic drive units 01 in the double magnetic gap double coil which are identical
are the same in structure and work principle of the magnetic transducer drive unit 01 in the
double magnetic gap double coil in each set as in FIG. Therefore, it will not be described
repeatedly in this embodiment.
[0030]
The frame 101 is an aluminum alloy frame, and an axial hole is provided at the bottom of the
frame 101 to align the core of the speaker with the coil skeleton 107. A bracket 181 made of
aluminum alloy is provided with a circular platform 1118 projecting inward at its axial center
portion, and the circular platform has a smooth and neat vertical outer peripheral surface, and a
ring-like groove 163 in the vertical outer peripheral surface. And two or more evenly arranged
permeable air holes 182 at the bottom of the ring-like groove 163, the outside of the ring-like
groove 163 being the open cylindrical thin wall of the bracket 181, and the inner periphery
thereof A smooth and neat horizontal positioning surface 1810 and a vertical positioning surface
1820 are provided on the axial height side with respect to the surface, and a flange is provided
extending outward at the tip of the cylindrical thin wall of the bracket 181 and fittingly
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connected to the frame 101 Provide several equally spaced screw holes in the flange, and screw
101 181 binds to one.
[0031]
Aluminum disc-like spacer made of nonmagnetic rigid material with appropriate thickness by
applying adhesive on the outer flat surface of lower electrode plate 103B of magnetic core of
magnetic drive unit 01 in the first set of double magnetic gap double coils Adhesively fixed to
1020. Then, an adhesive is also applied to the opposite flat surface of the disk-shaped spacer
1020, and adhesively fixed to the lower electrode plate 103B of the magnetic core of the
magnetic drive unit 01 in the second set of adhesive-formed double magnetic gap double coils
using a jig. . As shown in FIG. 3, the polarity of the magnetic core of the magnetic drive unit 01 in
two sets of double magnetic gap double coils is the core of a magnetic four-driver speaker in a
double magnetic gap double coil with coaxially equal diameter repelling magnets. Could be
configured. An adhesive is applied to the outer horizontal surface 1180 of the circular platform
1118 protruding inward, and the magnetic core is projected to the Y--Y axis which is the same of
the circular platform 1118 and the frame 101 and the bracket 181, Stick on the vertical
symmetry axis of the converter.
[0032]
An annular cylindrical yoke 113 mounted coaxially with the magnetic core is fitted from the top
downward onto the inner peripheral surface of the cylindrical thin wall of the bracket 181 and /
or adhesively fixed, and the vertical positioning surface 1820 and the horizontal positioning
surface 1810 It is glued to and positioned and / or set and fixed. The other end is fitted into the
circular shaft hole at the bottom of the frame 101 and is fixed to the frame 101 in alignment or
connection. The two horizontal end faces outside the annular cylindrical yoke 113 are higher at
the axial height side than the outer magnetic pole surfaces of the two upper electrode plates
103A with a H value of 0.5 to 20 mm. The inner peripheral surface of the annular cylindrical
yoke 113 and the central axis Y---Y axis of the upper electrode plate 103A, the permanent
magnet 102 and the lower electrode plate 103B have a vertical symmetry axis, and two upper
electrode plates 103A and two lower portions Between the vertical outer peripheral surface of
the electrode plate 103B and the inner peripheral surface of the annular cylindrical yoke 113,
four coaxial and equal diameter ring-shaped magnetic gaps 110 are formed. Insert four coaxial
coils of equal diameter in the ring-shaped magnetic gap 110, and determine in advance the
winding direction of the two coils 109 and the direction of the current flowing through the
magnetic drive unit 01 in the double magnetic gap double coil of each set. Thus, the coil 109A
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and the coil 109B are aligned in the same direction at the same operation moment so as to
generate an electromotive force F.
[0033]
Then, the axial height of the disk-like spacer 1020 is bisected equally to the bisector W--W axis
and the central axis Y-- of the upper electrode plate 103A, the permanent magnet 102 and the
lower electrode plate 103B. Y is a vertical symmetry axis, has a pair of repulsive magnets, and
has two sets of magnetic circuits showing left-right symmetry and top-bottom symmetry in the
geometrical shape and magnetic characteristics, and left-right symmetry and top and bottom in
the geometrical shape and electrical characteristics Form two sets of coil circuits showing
symmetry. As described in the explanatory note of FIG. 1, when the two coils 109A and 109B of
each pair of symmetrical coil circuits are connected in series, the winding direction of the wire is
reversed, and the wire cross sectional area of the two coils The coils consisting of two series
circuits with the same number of turns, winding width, resistance, inductance, and tension at the
time of winding are all equal, and finally this is connected in parallel (this example) In the
example, the two sets of double magnetic gap double coil magnetic drive units 01 have pairs of
repelling magnets, and have similar characteristics to resistive load characteristics or resistive
load characteristics, and each pair of series It becomes an internal magnetic 4 driver speaker in
which the back electromotive force in the coil circuit is offset each other.... By this, the upper
plate of the magnetic drive unit 01 in the second set of double magnetic gap double coils Double
attaching a round and / or toroidal spacer 1020 of suitable thickness made of non-magnetic rigid
material coaxial to the outer surface of 03A and applying the transducer to the opposite surface
of the round / or toroidal spacer 1020 By adhesively fixing on the outer surface of the upper
electrode plate 103A of the third set of double magnetic gap double coil drive unit 01, a double
magnetic gap double coil drive unit 01 having three sets and three or more sets of repulsive
magnets is formed. The first set, the second set, the third set... Double magnetic gap double coil
drive unit 01 makes one central axis Y--Y axis a vertical symmetry axis, and the same coil
skeleton The same frame and the same bracket, the same annular yoke, four / or more coaxial
and equal diameter ring-shaped magnetic gaps 110 and four / or set By providing six or more
equal coil 109 coaxial with diameter, constituting the inner magnetic multi driver transducer
having a magnet and symmetrical magnetic circuit and symmetrically coil circuit repel each other
pair or more pairs of.
[0034]
I would like to point out in particular that the thickness of the circular and / or annular spacer
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1020 made of nonmagnetic rigid material is the thickness of the upper electrode plate 103A and
the lower electrode plate 103B, the thickness of the permanent magnet 102 and its magnetic
energy Closely related to The so-called appropriate thickness is only such a thickness, and the
upper and lower sides of the two sets of symmetrical magnetic circuits and the two sets of
symmetrical coil circuits of each set of double magnetic gap double coil driving unit 01 described
in this embodiment. It means that the influence on the symmetry property can be neglected and
it is recognized that it is within the allowable range.
[0035]
Further, a permeable air hole 182 is provided around the circumference of the ring-shaped
groove of the bracket 181 for dissipating the heat generated by the magnetic circuit and the coil
circuit and reducing the damping of the transducer vibration system. Where permitted by the
dimensions and structural strength of the associated bracket 181, the projected areas of all the
through holes 182 are as large as possible and equal to one another. In view of the point that the
symmetrical coil can be dynamically balanced during transducer reciprocation, in the present
invention, the circular center and the center line of the permeable air holes 182 arranged
annularly all have the diameter of the coil skeleton 107 or the coaxial. By providing the
circumferences of the same coil projection relationship, the transducer's vibration system keeps
the required left-right symmetry of the coil circuit when vibrating up and down.
[0036]
FIG. 4 shows a longitudinal sectional view of an inner magnetic multi-driver converter
embodiment 2 according to the invention.
[0037]
This is an improvement over the embodiment of FIG. 3 and is applicable to medium- and largeaperture magnetic multi-driver speakers.
In the present embodiment, the upper electrode plate 103A and the lower electrode plate 103B
are four ring-shaped electrode plates, and an axial hole is set in the permanent magnet 102 so as
to be fitted to the upper electrode plate and the lower electrode plate. When mounting the two
sets of double magnetic gap double coil in-coil magnetic drive units 01 of FIG. 1 by forming a
through hole or a through screw hole in the axial center portion of the platform 1118 protruding
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to the inside of the bracket, Nonmagnetic material fasteners 1710, for example 1Cr18Ni9Ti
stainless steel bolts, from top to bottom in all axial holes to fit element 1710 of nonmagnetic
spacer 172, upper electrode plate 103A, permanent magnet 102, lower electrode plate 103B and
nonmagnetic ring spacer 1020 The nonmagnetic nut 175 of the concave shaft hole 170
embedded in the bottom of the bracket 181 inserts the adhesive and the fastener of the magnetic
core of the inner magnetic drive portion 01 of one or more repelling magnets described in the
present embodiment. By the force of the bracket is firmly connected with the bracket.
[0038]
As a modification of this embodiment, a screw hole 1751 is provided at an axial center portion of
the platform 1118 which protrudes to the inner side of the bracket 181, and the magnetic core
and the bracket are coupled together by a nonmagnetic clamp bolt 1710.
[0039]
For other variations of this embodiment, please refer to the description in Chinese Patent
Invention Patent CN200510091936.0, which has been granted the patent right of the present
inventor, as shown in FIGS.
Here, it shall not be described repeatedly.
[0040]
Medium- and large-diameter internal magnetic multi-drive speakers always have four or six
drivers, so the coil skeleton also tends to be long, and during axial piston movement, the distal
end of the coil skeleton has radial deflection. In order to prevent the occurrence of a failure in the
coil, this embodiment presents a technical solution of double dampers mounted at different shaft
heights. As shown in FIG. 4, the dampers 141-1 and 141-2 are simultaneously mounted at
different heights of the coil skeleton 107, and the larger the distance between them is, the more
distal the coil skeleton 107 (ring groove 163 Control of the radial deflection), and the occurrence
of coil failure in the speaker is also reduced.
[0041]
In addition, since the present embodiment and the FIG. 3 embodiment have completely the same
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structure and work principle, they will not be described repeatedly in the present invention.
[0042]
FIG. 5 shows a longitudinal sectional view of an inner magnetic multi-driver converter
embodiment 3 according to the invention.
[0043]
This is a modification of FIG. 4 embodiment 2 except that one annular cylindrical yoke 113 is
changed to two independent, coaxial, equal height annular cylindrical yokes 113 and a
nonmagnetic ring-shaped spacer 1021 fitted thereto By combining the two annular cylindrical
yokes 113 described above into one и и и In addition, because the structure and work principle of
this embodiment and FIG. 4 embodiment are exactly the same, The present invention shall not be
described repeatedly.
[0044]
FIG. 6 shows a longitudinal sectional view of the external magnetic multi-driver converter
embodiment 1 according to the present invention.
[0045]
The embodiment of the external magnetic 4-driver speaker provided with a symmetrical
magnetic circuit and a symmetrical coil circuit, wherein the two coaxially mounted upper
electrode plate 203A and lower electrode plate 203B are disk-like electrode plates and have the
same thickness and the same thickness It has a projected area and is fitted to a neodymium
magnet 202.
The upper electrode plate 203A and the lower electrode plate 203B are bonded together by an
axially magnetized neodymium magnet 202 uniformly disposed with one or more uniform
thicknesses to form a magnetic core.
The two identical double magnetic gap double coil external magnetic drive units 02 have the
same structure and work principle of the double magnetic gap double coil external magnetic
transducer drive units 02 of each set as FIG. Therefore, it will not be described repeatedly in this
embodiment.
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[0046]
The frame 201 is an aluminum alloy frame, and an axial hole is provided at the bottom to match
the core of the speaker and the coil skeleton 207.
The aluminum alloy bracket 281 is provided with a circular platform 2118 projecting inward at
its axial center portion, and a cylindrical body 212 projecting inward at the axial central portion
of the platform, and the platform projecting inward outside the bottom thereof Surface 211, the
circular platform has a smooth and neat vertical outer peripheral surface, and the vertical outer
peripheral surface is provided with a ring-like groove 263 and two or more evenly arranged
transmissions at the bottom of the ring-like groove 263 An air hole 282 is provided, and the
outside of the ring-shaped groove 263 is an open annular cylindrical thin wall of the bracket
281, and the horizontal positioning surface 2810 and the vertical positioning surface smooth and
neat on the axial height side with respect to the inner peripheral surface. 2820 is provided, and it
spreads out on the tip of the annular thin wall of the bracket 281 to fit the frame 201 Providing
a flange to be connected, provided with a threaded hole for several evenly spaced on the flange,
coupling the frame 201 and the bracket 281 to one with a screw 2013.
[0047]
An aluminum disc-like spacer made of an appropriately thick nonmagnetic rigid material by
applying an adhesive to the outer flat surface of the lower electrode plate 203B of the magnetic
core of the first set of double magnetic gap double coil outer magnetic drive unit 02 Adhesively
fixed to 2020.
Then, an adhesive is also applied to the opposite flat surface of the disk-like spacer 2020, and
adhesively fixed to the lower electrode plate 203B of the core of the magnetic core of the second
set of adhesive-formed double magnetic gap double coil outer magnetic drive unit 02 with a jig. .
The polarities of the cores of the two sets of double magnetic gap double coil outer magnetic
drive units 02 are shown in FIG. The magnetic core of the double magnetic gap double coil outer
magnetic four-driver speaker having the coaxial and equal diameter repulsive magnets can be
configured.
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[0048]
An adhesive is applied to the horizontal positioning surface 2810 and the vertical positioning
surface 2820 of the open annular thin cylindrical wall of the bracket 281, and the magnetic core
is embedded from the top to the lower open annular thin wall of the bracket 281 It is possible to
ensure that it is fixed and that it is located on the same Y--Y vertical axis as the inward projecting
circular platform 2118, the inward projecting cylindrical body 212, the frame 201 and the
bracket 281.
[0049]
An annular cylindrical yoke 213 mounted coaxially with the magnetic core is fitted and attached
to or fixed by adhesion to a cylindrical body 212 projecting downward to the inner side of the
bracket 281 from above, and is adhered to an inward projecting platform surface 211 To be
fixed and / or set and fixed.
The two horizontal end faces outside the annular cylindrical yoke 213 are higher at the axial
height side than the outer magnetic pole surfaces of the two upper electrode plates 203A with a
H value of 0.5 to 20 mm. The inner peripheral surface of the annular cylindrical yoke 213 has an
axis of vertical symmetry with the central axis Y --- Y axis of the upper electrode plate 203A, the
permanent magnet 202 and the lower electrode plate 203B, and two upper electrode plates
203A and two lower electrodes Between the vertical outer peripheral surface of the plate 203B
and the outer peripheral surface of the annular cylindrical yoke 213, four coaxial and equal
diameter ring-shaped magnetic gaps 210 are formed. Insert four coaxial coils with the same
diameter in the ring-shaped magnetic gap 210, and determine in advance the winding direction
of the two coils 209 and the direction of the current flowing through the double magnetic gap
double coil external magnetic drive unit 02 of each set. Thus, the coil 209A and the coil 209B are
aligned in the same direction at the same operation moment to generate an electromotive force F.
Then, the axis height of the disk-like spacer 2020 is bisected equally by the bisector W--W axis
as a horizontal symmetry axis, and the central axis Y-- of the upper electrode plate 203A, the
permanent magnet 202 and the lower electrode plate 203B. Y is a vertical symmetry axis, has a
pair of repulsive magnets, and has two sets of magnetic circuits showing left-right symmetry and
top-bottom symmetry in the geometrical shape and magnetic characteristics, and left-right
symmetry and top and bottom in the geometrical shape and electrical characteristics Form two
sets of coil circuits showing symmetry. As described in the explanatory note in FIG. 2, when the
two coils 209 of each pair of symmetrical coil circuits are connected in series, the winding
direction of the wire is reversed, and the wire cross sectional area and number of turns of the
two coils и The winding width, the resistance, the absolute value of the inductance, and the
tension at the time of winding are all equal, and finally, the two symmetrical series-connected
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coils are connected in parallel (this embodiment). The two sets of double magnetic gap double
coil outer magnetic drive units 02 have a pair of repelling magnets, have similar characteristics
to a resistive load characteristic or a resistive load characteristic, and each pair of series coil
circuits It becomes an external magnetic 4 driver speaker in which the back electromotive force
in each other cancels each other out of the upper plate 203A of the magnetic drive unit 02 in the
second set of double magnetic gap double coils. Double attaching a circular / or toric spacer
2020 of suitable thickness made of coaxial non-magnetic rigid material on the surface, the third
set of said transducers on the opposite surface of said circular / or annular spacer 2020 The
double magnetic gap double coil drive unit 02 having three sets and three or more sets of
repulsive magnets is configured by bonding and fixing to the outer surface of the upper electrode
plate 203A of the double magnetic gap double coil drive unit 02. The first set, the second set, the
third set иииииииииииии Double magnetic gap Double coil drive unit 02 has one central axis as a vertical
symmetry axis, the same frame as the same coil skeleton, and the bracket, The same annular
yoke, 4 / or more coaxial and equal diameter ring magnetic gaps 210 and 4 / or 6 coaxial or
more diameter equal to set By providing the coil 209, constituting the inner magnetic multi
driver transducer having a magnet and symmetrical magnetic circuit and symmetrically coil
circuit repel each other pair or more pairs of.
[0050]
I would like to point out in particular that the thickness of the circular and / or annular spacer
2020 made of nonmagnetic rigid material is the thickness of the upper electrode plate 203A and
lower electrode plate 203B, the thickness of the permanent magnet 202 and its magnetic energy
Closely related to The so-called appropriate thickness is only such a thickness, and the upper and
lower sides of the two sets of symmetrical magnetic circuits and the two sets of symmetrical coil
circuits of each set of double magnetic gap double coil driving unit 02 described in this
embodiment. It means that the influence on the symmetry property can be neglected and it is
recognized that it is within the allowable range.
[0051]
In addition, since the present embodiment and the FIG. 3 embodiment have completely the same
structure and work principle, they will not be described repeatedly in the present invention.
[0052]
FIG. 7 shows a longitudinal cross-sectional view of an extra-magnetic multi-driver converter
embodiment 2 according to the invention.
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[0053]
This is a modification of the second embodiment shown in FIG. 6, except that one annular
cylindrical yoke 213 is changed to two independent, coaxial, equal height annular cylindrical
yokes 213, and a nonmagnetic ring-shaped spacer 2021 fitted thereto. By adding the two
annular cylindrical yokes 213 described above to one ... и и и In addition, because the structure and
work principle of this embodiment and FIG. 6 embodiment 1 are completely the same The
present invention shall not be described repeatedly.
[0054]
FIG. 8 shows a longitudinal sectional view of the third embodiment of the outer magnetic multidriver converter described in the present invention.
[0055]
Since the pole plates 203A and 203B shown in the figure are pole plates having two axial holes
of different diameters, the axial distance from the axis Z to the axis Z is longer than that of the
second embodiment in FIG. Is particularly suitable when it has a very long linear stroke.
The other contents are the same as the explanatory text of FIG. 6 embodiment.
[0056]
FIG. 9 shows a longitudinal sectional view of an extra-magnetic multi-driver converter
embodiment 4 according to the invention.
[0057]
This is an embodiment relating to the deformed bracket 281 and the deformed second frame
2011.
Referring to the figure, two equal diameter dampers 241 are mounted at radial positions with the
W--W axis as a horizontal symmetry axis.
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A central axial hole provided at the lower part of the bracket 281 matches the coil skeleton 207.
Further, the frame 2011 is set on the outer plane thereof, and a circular plate 2012 having a
flange made of a nonmagnetic rigid material is provided on the outer plane of the inverted frame
2011, and a cylindrical body 2118 projecting inward at the axial center portion And the outer
peripheral surface of the annular cylindrical yoke 211 mounted coaxially with the Y--Y axis line
is coaxial and equal in diameter between the vertical outer peripheral surfaces of the electrode
plates 203A and 203B, as shown in FIG. Configuring four or four or more ring-shaped magnetic
gaps 210..., There is now a solution that constitutes an upper and lower double damper multidrive that better controls the radial deflection of the coil skeleton 207.
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