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JP2017073782

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2017073782
Abstract: [Problem] To provide a speaker component that provides clear low frequency sound
with less distortion. A first magnet assembly includes a first cage and a first cage in a thin
speaker 100 including a disk-shaped thin frame 102 and magnet assemblies 124 and 126
arranged in the thin frame. And a plurality of magnets 128 arranged. A support assembly 116
having a cone 118 and a support ring 120 attached to the cone and a voice coil 122 attached to
the support ring. The support ring and voice coil are suspended relatively close to the magnet
assembly so that the support ring and voice coil vibrate in response to electrical signals in the
voice coil. [Selected figure] Figure 2
Thin speaker
[0001]
The present invention relates generally to speakers such as those used in various consumer
electronics and audio systems.
[0002]
Audio systems are commonly used in homes, offices, cars, and many portable electronic devices.
One of the things to consider in determining how to deploy these audio systems is the amount of
space the system needs. In many cases, the speaker is the largest component of the audio system.
In general, cabinets and various loudspeaker components, in particular, components that provide
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low-frequency low-frequency noise, such as, for example, woofers (bass speakers) or subwoofers,
tend to be large and bulky. Typical subwoofer sizes are such that, for example, in cars, home
audio systems, or commercial applications where space is at a premium, or where the user sees
the components to some extent to the listener It can be difficult to incorporate easily and
conveniently into the system you want to do. Therefore, it is desirable to have a speaker
component that results in a clean low frequency sound but that is less bulky than conventional
speaker components.
[0003]
A specific method of subwoofer design to reduce the size of the subwoofer cabinet is disclosed in
US Pat. No. 6,130,954 issued to Carver, the teaching and disclosure of which is incorporated
herein by reference in its entirety. Be incorporated.
[0004]
Embodiments of the present invention provide such speaker components that provide clear low
frequency sound with low distortion.
These and other advantages of the invention, as well as additional inventive features, will be
apparent from the description of the invention provided herein.
[0005]
In one aspect, embodiments of the present invention provide a thin speaker having a thin frame
and a first magnet assembly disposed in the thin frame. The first magnet assembly has a first
cage and a plurality of magnets disposed in the first cage. The low profile speaker also includes a
cone, and a support assembly having a support ring attached to the cone, and a voice coil
attached to the support ring. The support ring and voice coil are suspended relatively close to the
magnet assembly so that the support ring and voice coil vibrate in response to electrical signals
in the voice coil.
[0006]
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In certain embodiments, multiple magnets are placed in individual pockets around the cage. The
first magnet assembly, the second magnet assembly, and the bottom plate may be annular or
rectangular. In another embodiment, the voice coil is a metal wire wound around the support
ring, and the first magnet assembly and the voice coil are concentric about the central axis of the
frame. The magnet assembly is disposed along the inner circumferential surface of the frame. In
some embodiments, the diameter of the voice coil may be larger than the magnet assembly, and
in an alternative embodiment, the diameter may be smaller than the magnet assembly.
[0007]
In another aspect, embodiments of the present invention provide a thin speaker having a thin
frame and a first magnet assembly disposed in the thin frame. The first magnet assembly has a
first cage and a first solid ring of composite magnetic material disposed in the first cage. The low
profile speaker also includes a cone, and a support assembly having a support ring attached to
the cone, and a voice coil attached to the support ring. The support ring and voice coil are
suspended relatively close to the magnet assembly so that the support ring and voice coil vibrate
in response to electrical signals in the voice coil.
[0008]
In an embodiment of the present invention, the first solid ring of the composite magnetic
material comprises a plurality of pieces of magnetic material suspended in epoxy. The pole pieces
of the plurality of pieces are aligned prior to curing of the epoxy. In a particular embodiment, the
fragments of magnetic material comprise fragments of neodymium.
[0009]
The low profile speaker may further include a low profile frame and a surround attached to the
support assembly. The envelope is made of an elastic material, and has an outer circumferential
portion, an inner circumferential portion, and an arched portion connecting the inner
circumferential portion and the outer circumferential portion. The outer portion is attached to
the low profile frame and the inner portion is attached to the cone. The cone is flat or concave to
the thin frame. In a particular embodiment, the enclosure is made of butyl rubber.
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[0010]
In a particular embodiment of the thin speaker, the first magnet assembly has a pole piece
attached to the bottom of a first solid ring of composite magnetic material. The pole pieces have
horizontal and vertical portions. A top plate is attached to the top surface of the first solid ring of
composite magnetic material. A support ring and a voice coil are housed in the gap between the
top plate and the vertical portion.
[0011]
Additionally, the thin speaker may include a second magnet assembly disposed in the thin frame.
The second magnet assembly has a second cage and a second solid ring of composite magnetic
material disposed in the second cage. The second magnet assembly is concentric with the first
magnet assembly and has a smaller width or diameter than the first magnet assembly. The first
magnet assembly and the second magnet assembly are connected by a bottom plate attached to
the bottom of the first and second solid rings of composite magnetic material in the first and
second magnet assemblies. In an embodiment, the first upper plate is attached to the upper
surface of the first solid ring of composite magnetic material, and the second upper plate is
attached to the upper surface of each of the second solid ring of composite magnetic material
There is. A support ring and a voice coil are accommodated in the gap between the first upper
plate and the second upper plate.
[0012]
In certain embodiments, the first solid ring of composite magnetic material has individual poles
such that the first solid ring of composite magnetic material effectively has a single N pole and a
single S pole. Contains magnetic fragments that are aligned. Furthermore, the second voice coil is
wound on the support ring, and the voice coil and the second voice coil are in close proximity to
the opposite pole of the first solid ring of composite magnetic material.
[0013]
In certain embodiments, the ratio of thin speaker width or diameter to speaker depth is greater
than 10 in some embodiments, and greater than 20 in particular embodiments.
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[0014]
In yet another aspect, embodiments of the present invention provide a thin speaker including a
frame having a stepped portion.
The stepped portion has a plurality of openings, and a plurality of magnets are disposed in the
plurality of openings. The voice coil is supported by a cone disk that fits within the stepped
frame, and the voice coil is suspended relatively close to the magnets. At the same time, the top
plate and pole piece hold the magnets in the frame. The top plate and pole pieces are assembled
such that the voice coil can vibrate in the gap between the top plate and the pole pieces.
[0015]
Certain low-profile speakers include an enclosure made of an elastic material, the enclosure
having an outer circumferential portion and an inner circumferential portion, the outer
circumferential portion being attached to the frame, and the inner circumferential portion being
attached to a cone disc, a cone disc and A voice coil is suspended in the gap between the top
plate and the pole piece.
[0016]
In embodiments, the cone disk is made of one of aluminum and a transparent material.
The peripheral portion of the frame may include a plurality of openings. In another embodiment,
the pole pieces have horizontal and vertical portions, and the aforementioned gap is between the
vertical portions and the inner circumferential surface of the top plate.
[0017]
Other aspects, objects, and advantages of the present invention will become more apparent from
the following detailed description, taken in conjunction with the accompanying drawings.
[0018]
The accompanying drawings, which are incorporated in and form a part of the specification,
illustrate several aspects of the present invention and, together with the description, serve to
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explain the principles of the invention.
[0019]
FIG. 1 is a perspective view of a thin speaker constructed in accordance with an embodiment of
the present invention.
FIG. 2 is a cross-sectional view of the thin loudspeaker of FIG. 1 constructed in accordance with a
specific embodiment of the present invention.
FIG. 3 is a cross-sectional view of the thin speaker of FIG. 2 showing perspective views of the thin
speaker shown at different angles and. FIG. 4 is a cross-sectional view of a thin speaker
constructed in accordance with an alternative embodiment of the present invention. FIG. 5 is a
cross-sectional view of the thin speaker of FIG. 4 showing perspective views of the thin speaker
shown at different angles and. FIG. 6 is a cross-sectional view of a thin speaker including a back
baffle and a second enclosure according to an embodiment of the present invention. FIG. 7 is a
perspective view of a thin rectangular speaker constructed in accordance with an embodiment of
the present invention. FIG. 8 is a perspective view of a thin rectangular speaker constructed in
accordance with an embodiment of the present invention. FIG. 9 is a perspective view of the thin
speaker of FIG. 1 assembled in a square housing. FIG. 10 is a cross-sectional view of a thin
speaker constructed in accordance with an alternative embodiment of the present invention. FIG.
11 is an exploded isometric view of a thin speaker constructed in accordance with an
embodiment of the present invention. 12 is an isometric view of the thin loudspeaker of claim 11
including a frame with a plurality of openings.
[0020]
The present invention will be described in connection with certain preferred embodiments, but is
not limited to those embodiments. On the contrary, it is intended to cover all alternatives,
modifications, and equivalents as included within the spirit and scope of the present invention as
defined in the appended claims.
[0021]
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FIG. 1 shows a perspective view of a thin speaker 100 constructed in accordance with an
embodiment of the present invention. In certain embodiments, the thin speaker 100 of FIG. 1 is a
subwoofer configured to provide low frequency sound. In many conventional speaker systems,
the subwoofer (or simply "sub") is generally 8 inches to 21 inches in diameter and is dedicated to
the reproduction of bass audio frequencies (or "busses"). Typical frequency ranges for
subwoofers are around 20-200 Hz for consumer products, less than 100 Hz for professional live
sound, and less than 80 Hz for modern subwoofers There are many.
[0022]
In the embodiment of FIG. 1, the thin speaker 100 is attached to the upper edge of the cup-like
portion 104 at the periphery of the disk-like frame 102 and the substantially disc-like thin frame
102 including the cup-like portion 104 therein. And the flange-like portion 106. In at least one
embodiment, the frame 102 is shaped and formed from a single, malleable but sufficiently rigid
material, or molded from a suitable rigid material. However, in an alternative embodiment, the
frame 102 is assembled from separate components.
[0023]
An envelope 108 is mounted on the surface of the flange-like portion 106. The envelope 108 is
an annular part made of an elastic material, for example an elastomer such as butyl rubber. In a
particular embodiment, the annular surface of the envelope 108 is arched to provide a first flat
portion 110 or outer flat portion of the arch 112 and a second flat portion 114 or inner flat
portion of the arch 112. The top of the arch 112 forms a substantially circular shape at the
midpoint between the inner diameter and the outer diameter of the annular enclosure 108. The
first flat portion 110 of the envelope 108 is attached to the surface of the flanged portion 106 of
the frame 102. The second flat portion 114 of the envelope 108 extends radially to the cup-like
portion 104 and, as shown in FIGS. 2 and 3, the support assembly 116 including the cone 118
and the support ring 120. Is attached to For the embodiments of the present invention, the
"cone" is not necessarily conical and may have various shapes including, but not limited to,
planar, concave, convex and conical. In conventional speakers, the support ring 120 is more
typically referred to as a wound or voice coil wound.
[0024]
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2 and 3 show cross-sectional views of the thin speaker 100. FIG. The second flat portion 114 of
the envelope 108 is attached to a planar circular cone 118. The circular cone 118 is likewise
attached to a support ring 120 which supports the voice coil 122. In embodiments of the present
invention, voice coil 122 comprises a wire made of aluminum, copper, alloys of these metals, or
some other suitable material. The wire is wound around the support ring 120. The support ring
120 may be made of plastic or some other lightweight but rigid material suitable for supporting
the voice coil 122. The embodiment of FIG. 2 shows a first magnet assembly 124 and a second
magnet assembly 126.
[0025]
In at least one embodiment, each magnet assembly 124, 126 includes an annular cage that holds
a plurality of magnets 128. In general, the annular cage is configured to equally space the
magnets 128 around the frame 102. The illustrated first and second magnet assemblies 124,
126 are annular, and the diameter of the first magnet assembly 124 is larger than the diameter
of the second magnet assembly 126. Frame 102 may be configured to hold the annular cage in
place. In some embodiments, the magnets 128 are arranged side by side in pockets around the
entire circumference of the annular cage.
[0026]
The first magnet assembly 124, the outer magnet assembly, is disposed substantially along the
inner wall of the cup-like portion 104 of the frame 102, spaced from the outer diameter surface
of the voice coil 122 and the support ring 120. The second magnet assembly 126, ie, the inner
magnet assembly, is spaced apart from the inner diameter surface of the voice coil 122 and the
support ring 120. In at least one embodiment, the magnet assemblies 124, 126 each include a
magnet 128 made of a rare earth metal such as neodymium or samarium cobalt. The strength of
these magnets 128 allows the construction of a smaller and lighter magnet assembly than is
generally found in conventional speakers. In a particular embodiment, each magnet 128 is
rectangular and approximately 1 inch high by 0.5 inches wide by 8 inches deep. However,
alternative embodiments may include larger or smaller magnets 128. Furthermore, in alternative
embodiments, the magnets 128 may be curved rather than planar, or may have shapes other
than rectangular.
[0027]
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An annular bottom plate 130 couples the bottom surface of the magnet 128 in the outer magnet
assembly 124 to the bottom surface of the magnet 128 in the inner magnet assembly 126. In
conventional speakers, this bottom plate 130 may be referred to as a pole piece. In at least one
embodiment, the annular bottom plate 130 is arched outwardly away from the magnet 128 to
create more space for the voice coil 122 to move between the magnet assemblies 124 and 126.
ing. There are two annular top plates. The first top plate 132, the outer top plate, is attached to
the top surface of the magnet 128 in the outer magnet assembly 124. The second top plate 134,
the inner top plate, is attached to the top surface of the magnet 128 of the inner magnet
assembly 126.
[0028]
As can be seen from FIG. 2, the first and second magnet assemblies 124, 126, together with the
bottom and top plates 130, 132, 134, have a rectangular or box-like cross section internally
having an opening for the voice coil 122. Form The opening is more precisely described as an
annular gap 136 between the outer first upper plate 132 and the inner second upper plate 134.
This annular gap, commonly referred to as the magnetic gap 136, allows the annular voice coil
122 and the attached support ring 120 to move back and forth in the magnetic gap 136 without
contacting either of the upper plates 132, 134. They are separated by enough space to be just
right. Thus, when the thin speaker 100 is not operating, the voice coil 122 and the support ring
120 can be connected between the two magnet assemblies 124, 126 via the connection to the
cone 118 and the enclosure 108, respectively. It is suspended in the magnetic gap 136 between
the two annular top plates 132, 134 in such a way that at least one part is present. In an
embodiment, the bottom plate and the two top plates are made of ferromagnetic material.
[0029]
By fabricating the magnet assembly 124, 126 annularly and spacing the voice coil 122 relative
to the magnet assembly 124, 126, a subwoofer of sufficiently reduced depth is constructed as
compared to a conventional subwoofer. It becomes possible. The annular inner and outer magnet
assemblies 124, 126 are substantially concentric. The inner and outer magnet assemblies 124,
126, together with the top plates 132, 134 and the bottom plate 130, operate with low distortion
of the low frequency sound with low depth, even if the thin speaker 100 is shallow. A magnetic
field sufficient to drive the support ring 120 is generated. Typical embodiments of the thin
speaker 100 (e.g., a home audio system) have a depth or thickness, even for diameters up to 20
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inches or more, when using a magnet 128 about 1 inch high. Is considered to be about 2-3
inches. However, it is also contemplated that this 3-inch depth can be made shallower to less
than 2 inches or even less than 1 inch, for example, by lowering the height of the magnet 128
and the height of the corresponding voice coil 122. Ru. Thus, in the thin speaker 100
embodiment, the ratio of the diameter or width of the thin frame 102 to the thickness or depth of
the frame 102 may be approximately 7-25, and in some embodiments greater than 25. In the
context of the present application, the term "thin" refers to speakers and speaker components
having a width to depth ratio in the range described above.
[0030]
It should also be noted that the design disclosed herein is scalable so that the thin speaker 100
can be miniaturized for use in applications such as headphones, cell phones and MP3 players and
the like. However, at the other end of the scope, the speaker system for use in thin speakers 100
in larger sizes suitable for use in home or car speaker systems or in commercial applications
such as stadiums and entertainment venues Can be manufactured to a size suitable for use in
Therefore, it is assumed that this design will be used from speakers as small as 0.5 inches in
diameter to those with diameters in excess of 30 inches. Furthermore, the scalability of the thin
design allows speakers of all sizes to have a width to depth ratio according to the range specified
above.
[0031]
Similarly, in the alternative embodiment of the present invention shown in FIGS. 2 and 3, a
magnet assembly is used that includes a solid ring of composite magnetic material. In this
embodiment, several pieces of magnetic material, such as neodymium, are suspended in the
liquid epoxy. The liquid epoxy is formed into a ring, and the magnetic poles of the magnetic
segments are aligned such that the ring has substantially a single north pole and a single south
pole. The epoxy is then cured to form a rigid magnetic ring. The magnetic rings are attached to
the top and bottom plates 132 and 130 of the ferromagnetic material and assembled to the
speaker frame 102 as shown in the embodiment of FIGS. 4 and 5 and described below. In
another embodiment, as shown in the embodiment of FIGS. 2 and 3, two solid magnetic rings
124, 126 of slightly different diameter are used to represent the magnet 128 on each side of the
voice coil 122. Generally, solid magnetic rings 124, 126 are concentrically arranged and, as
shown in FIGS. 2 and 3, bimagnetic rings 124 such that bottom plate 130 of ferromagnetic
material joins rings 124, 126 at the bottom edge. , 126 assembled. In an embodiment, as shown
in FIGS. 2 and 3, each magnetic ring 124, 126 has its own upper plate 132, 134 of ferromagnetic
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material, and the upper plates are suspended internally It is arranged to form a magnetic gap
136 which allows the voice coil 122 to move.
[0032]
FIGS. 4 and 5 show cross-sectional views of alternative embodiments of the thin speaker 200. In
this alternative embodiment, the frame 102, the envelope 108, the voice coil 122, and the
support ring 122 are similar or identical to the components in the embodiment of FIGS. However,
alternative embodiments have only one magnet assembly 224 having a cage 225 and a plurality
of rectangular magnets 128. Furthermore, the cone 218 is concave in this embodiment and
curved towards the cup-like portion 104 of the frame 102, instead of the planar cone 118 of
FIGS. In the embodiment of FIGS. 4 and 5, the magnet assembly 224 is disposed along the inner
wall of the cup-like portion 104 of the frame 102 facing the outer diameter surface of the voice
coil 122 and the support ring 120. In some embodiments, a snap ring 203 or similar device is
used to secure the magnet assembly 224 in place within the frame 102. A top plate 232 is
attached to the top surface of the magnet 128 of the magnet assembly 224 and extends
horizontally a short distance from the top of the magnet 128. A bottom plate or pole piece 230 is
attached to the bottom of the magnet 128 in the magnet assembly 224. The pole piece 230
extends horizontally from the magnet 128 below the annular voice coil 122 and the vertical
portion 231 extends upward and towards the inner diameter surface of the voice coil 122 and
the support ring 120.
[0033]
In this arrangement, there is a magnetic gap 236 between the top plate 232 and the vertical
portion 231 of the pole piece 230. In at least one embodiment, the top plate 232 and the pole
piece 230 are made of a ferromagnetic material. Thus, the voice coil 122 and the support ring
120 can be coupled to the magnetic gap 236 between the top plate 232 and the vertical portion
231 of the pole piece 230 and also between the magnet assembly 224 and the vertical portion
231 of the pole piece 230. Suspended to
[0034]
In operation, the magnet assembly 224 and the pole piece 230 have a magnetic field sufficient to
drive the voice coil 122 and the attached support ring 120, even in low depth thin speaker 200
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with low distortion of low frequency noise. Generate The support assembly 116 is supported in a
suspended state by being attached to the enclosure 108 and oscillates or moves back and forth
in the space between the magnet assembly 224 and the vertical portion 231 of the pole piece
230. In certain embodiments of the present invention, the range of movement of voice coil 122 is
approximately 0.5 inches to 0.75 inches. However, depending on the size of the magnet 128 and
the thickness of the voice coil 122, the range of movement of the voice coil 122 can be more or
less than 0.5-0.75 inches.
[0035]
In the alternative embodiment of the present invention of FIGS. 4 and 5, the magnet assembly
224 is positioned inside the voice coil 122 and the support ring 120, and the magnet 128 is on
the inner diameter surface of the voice coil 122 and the support ring 120. Try to face each other.
In this embodiment, as in the previous embodiment, pole piece 230 is attached to the bottom of
magnet 128. The vertical portion 231 extends below the annular voice coil 122 and spaced
upwards towards the outer diameter surface of the voice coil 122 and the support ring 120. As in
the example above, pole piece 230 is made of a ferromagnetic material. Also, as in the example
above, voice coil 122 and support ring 120 are suspended between magnet assembly 224 and
vertical portion 231 of pole piece 230. Further, the voice coil vibrates or moves back and forth in
the magnetic gap 236 between the magnet assembly 224 and the vertical portion 231 of the
pole piece 230 in this alternative embodiment.
[0036]
FIG. 6 illustrates an embodiment of a low profile speaker 300 that includes an envelope 108, a
concave cone 218, and a back baffle 308 attached to the frame 102. The back baffle 308 is
structurally similar to the envelope 108 and is made of an elastomeric elastomeric material such
as butyl rubber. The rear baffle 108 allows the rear portion 310 of the frame 102 to move to
some extent. In this configuration, the low profile speaker 300 performs a similar function to the
isobaric speaker and has a reduced frequency response. In general, the term "isobaric speaker"
refers to operating characteristics using at least two woofers or bus drivers in a loudspeaker unit.
From a practical point of view, the use of isobaric loading on the speaker system is to reduce the
bus frequency response.
[0037]
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7 and 8 show perspective views of a thin rectangular speaker 400 constructed in accordance
with an embodiment of the present invention. The components and internal structure of the
rectangular speaker 400 are the same as or the same as those of the above-described
embodiment, except that the frame, the enclosure, the magnet assembly, the voice coil, and the
support ring and the cone are not circular. It is to be rectangular. Of course, in alternative
embodiments of the present invention, the thin speakers can be configured in other shapes, such
as oval, hexagonal, octagonal, triangular, or any of a variety of shapes. One advantage of the
rectangular speaker 400 shown in FIG. 7 is that it can be easily installed in the wall of a home or
building between adjacent studs, as shown in FIG. However, this can also be achieved using a
rounded thin speaker 100 mounted in a rectangular box 402 as shown in FIG.
[0038]
FIG. 10 is a plan view of a thin speaker 500 having a dual coil configuration according to an
embodiment of the present invention. In this embodiment, the magnet assembly is adapted to
hold either a plurality of relatively small magnets 128 in the magnet assembly 526 or a solid ring
of composite magnetic material in the magnet assembly 526 as described above. Includes a
configured annular cage 524. In particular embodiments, the magnet assembly 526 is in contact
with or in close proximity to the frame 102. Top plate 532 and bottom plate 530, which are
approximately equal in size, are attached to the top and bottom edges of magnet 128,
respectively.
[0039]
The top and bottom plates 532, 530 are made of ferromagnetic material and project radially
inwardly from the circumference of the magnet 128 and the frame 102. The first voice coil 522
is positioned relatively close to the top plate 532, while the second voice coil 523 is positioned
relatively close to the bottom plate 530. In at least one embodiment, two voice coils 522, 523 are
wound around the support ring 520 in opposite directions. In an alternative embodiment, the
two voice coils 522, 523 are wound in the same direction but the end of the first voice coil 522
is connected to a power supply (not shown) so that the polarity is second Of the end of the voice
coil 523 of FIG. In this manner, voice coils 522, 523 placed in close proximity to the opposite
pole of magnet 128 move in the same direction in response to the electrical signals driving
speaker 500.
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[0040]
FIG. 11 is an exploded isometric view of a thin speaker 600 constructed in accordance with an
embodiment of the present invention. The low profile speaker 600 has an annular stepped frame
602 with a flange 603 and an internal step 605. Around the inner stage 605 there are a plurality
of rectangular openings 607 for holding a plurality of magnets 604. While held in place by the
rectangular openings 607, each of the plurality of magnets 604 is supported at the bottom by
the pole piece 606 and at the top by the top plate 608. The pole piece e 606 includes an annular
horizontal portion 609 and an annular vertical portion 615. In the illustrated embodiment, the
magnet 604 is cubical, but in alternative embodiments the magnet may have a shape other than
cubical and the rectangular openings 607 may be other than rectangular. In another
embodiment, the plurality of magnets 604 may be replaced with a solid ring of composite
magnetic material as described above.
[0041]
The pole pieces and the top plates 606, 608 are made of ferromagnetic material. An annular
envelope 610 made of an elastic material such as butyl rubber has an outer circumferential
portion 611 and an inner circumferential portion 613. The outer peripheral portion 611 is
attached to the flange 603 of the annular stepped frame 602, while the inner peripheral portion
613 is attached to the cone disc 612, which is the combination of the cone of the previous
embodiment and the support ring . In a particular embodiment, the cone disk 612 is made of
aluminum and has the effect of reducing magnetic eddy currents during operation of the speaker.
As a result, the thin speaker 600 operates more efficiently, ie less power is required for
equivalent output when compared to the thin speaker 600 using non-metallic cone disk 612 . In
an alternative embodiment, the cone disc 612 is made of a transparent material that allows the
internal parts of the speaker to be clearly visible. In this case, a light can be placed behind the
transparent surface of the cone disk to make the thin speaker 600 look better. In addition, the
transparent material is coated to allow digital photographs or videos to be viewed on the surface
of the cone disc 612.
[0042]
The voice coil 614 is wound around the periphery of the cone disk 612. Those skilled in the art
will recognize that voice coil 614 is integrated with a cone disk so that a single component
includes, for example, the cone shown in the embodiment of FIG. 2, a support ring, and a voice
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coil.
[0043]
The operation of the thin loudspeaker 600 is very similar to the embodiment described above.
When fully assembled, there is a gap (not shown) between the top plate 608 and the vertical
portion 615 of the pole piece 606. The voice coil 614 and the peripheral portion of the cone disk
612 are suspended in the gap and held in place by the enclosure 610. As can be seen from FIG.
11, the enclosure 610 has two arched portions rather than one arched portion shown in the
enclosure 108 of FIG. A larger enclosure 608 in FIG. 11 is used to more securely attach between
the enclosure 608 and the cone disk 612. This provides more support and stability to the cone
disc 612 and voice coil 614.
[0044]
FIG. 12 shows an isometric view of the assembled thin speaker 600. In the embodiment of FIG.
12, the low profile speaker 600 includes a frame 622 and a plurality of slots 624 around the
frame 622. In the illustrated embodiment, the slots are vertically oriented. The slots allow the
cooling flow of air to enter and exit the thin speaker 600. In alternative embodiments, the slots
624 may be round holes or openings of a suitable shape to allow air flow through the speaker
600. In another embodiment, the pole piece 606 may have a plurality of openings similar or
identical to those in the frame 622. In addition to the cooling function, the plurality of slots 624
also reduce the back pressure inside the thin speaker 600 caused by the movement of the cone
disc 612 during operation of the speaker. This reduces the stress on the components of the thin
speaker 600. In conventional sealed speakers, it is common for the back pressure to rise during
operation of the speaker. The embodiment of FIG. 12 shows the thin speaker 600 and most of
the components in a rounded shape, including, but not limited to, rectangular, hexagonal,
octagonal, oval and triangular. Other shapes are envisioned within the scope of the present
invention.
[0045]
All references, including publications, patent applications and patents cited herein, are
incorporated herein by reference to the same extent as if each reference was individually and
specifically indicated to be incorporated by reference. To the same extent as set forth in its
entirety, and is incorporated herein by reference.
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[0046]
The use of the terms "a" and "an" and "the" and similar referents is not indicated herein in the
context of the description of the invention, in particular in the context of the following claims. As
long as there is no apparent contradiction with the contents, it is interpreted as covering both
singular and plural forms.
The terms "comprising", "having", "including" and "containing" are also open-ended terms (ie,
including, but not limited to) unless specifically stated otherwise Meaning "not". The recitation of
ranges of values herein is merely intended to serve as a brief and concise method of individually
describing each and every value falling within the range, unless otherwise specified herein. , And
each and every value are incorporated into the specification as if individually listed herein. All the
methods described herein can be carried out in any suitable order, unless otherwise specified
herein or otherwise clearly contradictory to the content. The use of any and all examples
provided herein or in the exemplary language (e.g. "such as") is merely to better illustrate the
present invention and is not claimed as such As long as it does not limit the scope of the present
invention. No language in the specification should be construed as indicating any non-claimed
element as essential to the practice of the invention.
[0047]
Preferred embodiments of the invention are described herein, including the best mode known to
the inventors for carrying out the invention. Variations of those preferred embodiments may be
apparent to those skilled in the art from reading the above description. We anticipate that those
skilled in the art will employ such variations as appropriate, and we will practice the invention
otherwise than as specifically described herein. Intended to be. Accordingly, this invention
includes all modifications and equivalents of the subject matter of the claims appended hereto as
permitted by applicable law. Furthermore, any combination of the above-described elements in
all possible variations thereof is included in the present invention unless otherwise specified
herein or unless it is clearly contradictory to the contents.
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