• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Disclosed is a shallow subwoofer type of loudspeaker, the shallow subwoofer having a chassis and comprising a membrane with voice coil along an excitation path arranged to interact with a pole piece arrangement comprising a first pole with a voice coil end with a first pole face and a second pole with a voice coil end with a second face, which first and second faces are configured to form a gap along an gap path and to magnetically interacting with the voice coil.
    公开号:DK201870191A1
    申请号:DKP201870191
    申请日:2018-03-28
    公开日:2019-11-04
    发明作者:Kahfizadeh Milad
    申请人:Fibona Acoustics Aps；
    IPC主号:
    专利说明:

    Field of the Invention
    The present invention relates to a shallow subwoofer of the type that can be used in a lower range of the audible range such as 30 Hz- 3 kHz.
    Background of the Invention
    Subwoofers of the type mentioned suffer from a number of drawbacks such as material use, size (depth) in order to provide sufficient sound pressure during intended use.
    It is an object to overcome problems and obtain a workable subwoofer in the intended frequency range.
    It is further object to enable and provide compact and shallow solution.
    Description of the Invention
    An object is achieved by shallow subwoofer type of loudspeaker, the shallow subwoofer having a chassis and comprising a membrane with voice coil along an excitation path arranged to interact with a pole piece arrangement comprising a first pole with a voice coil end with a first pole face and a second pole with a voice coil end with a second face, which first and second faces are configured to form a gap along an gap path and to magnetically interacting with the voice coil.
    The first pole may have a multiple first magnet ends and the second pole has corresponding multiple second magnet ends, where a corresponding first and second magnet ends are configured to couple with a magnet.
    In an aspect, the first pole and the second pole are complementary star-shaped magnetic ends wherein each leg has a recess for complementary engagement with the magnet.
    The outlined shallow subwoofer may be suitable and intended to operate in a frequency range of 30 Hz- 3 kHz. A person skilled in the art will appreciate that the rage is
    DK 2018 70191 A1 indicative. The constructions shown will perform with a desired frequency response in the range indicated.
    By shallow subwoofer is achieved a compact and shallow powered subwoofer. The subwoofer may have a size of 4”, 5”, or 7” or there between and will find use as a compact and very shallow powered subwoofer.
    In an aspect, the first and second magnetic ends are arranged outside the chassis and the first and second voice coil ends are arrange inside the chassis.
    Thus the magnets and the magnetic ends can be cooled.
    The shape of the magnetic ends may be fan-like towards the voice coil end so as to distribute the magnetic flux from the magnets towards respective pole faces thereby achieving a uniform magnetic flux distribution in the gap.
    A person skilled in the art will appreciate a wealth of magnetic materials suitable as pole material.
    In an embodiment the chassis is made of a non-magnetic metal such as aluminium. The chassis may be an alloy, including aluminium, of non-magnetic materials.
    In an aspect, one, more or all magnets are symmetrical about the magnetisation axis (N-S-axis); including spherically formed magnets.
    Thereby providing a well-defined magnetic source of magnetic flux to be distributed from the magnetic end of the first and second poles.
    In an aspect one, more or all magnets have point like pole ends at the respective Npole and S-pole.
    The point-like pole ends may include rotational symmetrical shapes or pyramid shapes.
    DK 2018 70191 A1
    In an aspect the first and second pole faces are configured to form the gap and the gap path corresponding to an excitation path of a substantially stiff membrane.
    The membrane has a plurality of structure paths each single structure path substantially extending between the excitation path and the suspension path and along each individual structure path being non-flush structures to the otherwise flush outward face wherein the projection of the structure paths has the shape of a curve section of one or more curves or approximations thereto and chosen amongst:
    a Fibonacci spiral, a golden spiral, an Archimedean spiral, a Euler spiral, a Fermat's spiral, a hyperbolic spiral, a logarithmic spiral, or combinations thereof.
    The construction of the structural paths is well described in patent application WO 2017/076413 A1.
    The structural paths have shown also to be advantageous in the case of a centrally excited membrane that is suspended at the outer part. A membrane as disclosed may be substantially stiff and move as a piston. In particular the suggested membrane with structural paths as disclosed above further enables a shallow form factor and a substantially linear response in the intended frequency range of 30 Hz to 3 kHz.
    In an aspect the membrane is suspended at the outer periphery by a suspender, which suspender has a structure path wherein each single structure path has the shape of a curve section of one or more curves or approximations thereto and chosen amongst:
    DK 2018 70191 A1 a Fibonacci spiral, a golden spiral, an Archimedean spiral, a Euler spiral, a Fermat's spiral, a hyperbolic spiral, a logarithmic spiral, or combinations thereof.
    By applying the structural paths outlined and known from WO 2017/076413 A1, unwanted modes can be even further dampened.
    The outlined subwoofer allows for the use of spherical Neo-type Magnets. The outlined subwoofer minimises the need for steel in the magnet and pole arrangement. The outlined subwoofer allows for voice coil air rush cooling. The outlined subwoofer allows for use of the so-called “Fibona Membrane” disclosed in WO 2017/076413 A1, which content is incorporated herein as for the construction of structure paths and aspects of the membrane.
    The outlined subwoofer allows for a resonance optimized rubber surround suspension. Overall the outlined subwoofer allows for a shallow or very shallow subwoofer with a suitable performance in the intended frequency range of about 30 Hz- 3 kHz.
    An object may be achieved by a pole piece arrangement for an audible range loudspeaker and comprising a first pole with a voice coil end with a first pole face and a second pole with a voice coil end with a second face, which first and second faces are configured to form a gap along an activation periphery and to magnetically interacting with the voice coil wherein the first pole has a multiple first magnet ends and the second pole has corresponding multiple second magnet ends, where a corresponding first and second magnet ends are configured to couple with a magnet.
    In an aspect, the first pole and the second pole are complementary star-shaped magnetic ends wherein each leg has a recess for complementary engagement with the magnet.
    DK 2018 70191 A1
    In an aspect the first and second voice coil ends have opposing first and second pole faces, the faces being substantially perpendicular to the legs of the star; and the first and second pole faces encircling an aperture substantially in the centre of the star.
    The pole piece arrangement outlined may be implemented in a loudspeaker including the shallow subwoofer outlined.
    In an aspect the second pole may be have the voice coil end bending in an L-shape and formed as an annulus part forming a centre hole in the pole arrangement. The first pole may be substantially flat and possibly with an L-shaped or T-shaped end towards the voice end. The L-shaped voice end of the second pole and the L-shaped or Tshaped end of the first pole may form the opposing faces. The first pole may have a centre aperture through which the voice end of the second pole penetrates.
    A person skilled in the art will be able to further extract details from the exemplary embodiments shown in the figures. In particular the star-like shape of the magnet ends and the transition to a continuous annulus shaped voice end is illustrated. Furthermore specific suggestive aspect relating to flow, aeration and cooling are also evident from the figures.
    Description of the Drawing
    The invention is described by example only and with reference to the drawings, whereon:
    Fig. 1 illustrates a pole piece arrangement;
    Fig. 2 illustrates a cross-section of a shallow subwoofer; and
    Fig. 3 illustrates another shallow subwoofer having a star-shaped magnetic ends.
    DK 2018 70191 A1
    Detailed Description of the Invention
    ItemNoLoudspeaker membrane10Outward face12Suspension path20Excitation path22Structure path24Non-flush structures26Outer periphery30Aperture32Symmetry point40Curve50Curve section54Shallow subwoofer100Gap110Gap path111Activation periphery116Magnet122Chassis130Suspender140Voice coil150Pole piece160Pole162A, 162BVoice coil end163First pole face164ASecond pole face164BCopper cap166Magnet end167A, 167BSpider180
    DK 2018 70191 A1
    Fig. 1 illustrates a pole piece arrangement 160 for an audible range loudspeaker and comprising a first pole 162A with a voice coil end 163 with a first pole face 164A and a second pole 162B with a voice coil end 163 with a second face 164B.
    The first and second faces 164A, 164B are configured to form a gap 110 along an activation periphery 116 and to magnetically interacting with the voice coil 150.
    The first pole 162A has a multiple first magnet ends 167A and the second pole 162B has corresponding multiple second magnet ends 167B, where a corresponding first and second magnet ends 167A, 167B are configured to couple with a magnet 122.
    The pole piece arrangement 160 has an aperture in-between the second pole 162B.
    Fig. 2 illustrates a cross-section of a shallow subwoofer 100 type of loudspeaker.
    The shallow subwoofer 100 having a chassis 130 and comprising a membrane 10 with a voice coil 150 along an excitation path 22 arranged to interact with a pole piece 160 arrangement.
    The shallow subwoofer 100 comprises a spider 180 for stabilisation.
    The pole piece 160 arrangement comprises a first pole 162A with a voice coil end 163 with a first pole face 164A and a second pole 162B with a voice coil end 163 with a second face 164B.
    A copper cap 166 is placed at the voice coil end 163.
    The first and second faces 164A, 164B are configured to form a gap 110 along a gap path 111 and to magnetically interacting with the voice coil 150.
    The first pole 162A has a multiple first magnet ends 167A and the second pole 162B has corresponding multiple second magnet ends 167B, where a corresponding first and second magnet ends 167A, 167B are configured to couple with a magnet 122.
    DK 2018 70191 A1
    The pole piece arrangement 160 has an aperture in-between the second pole 162B.
    The first and second magnetic ends 167A, 167B are arranged outside the chassis 130 and the first and second voice coil ends 163 are arrange inside the chassis 130.
    In an embodiment the chassis is made of a non-magnetic metal such as aluminium.
    The first and second pole faces 164A, 164B are configured to form the gap 110 and the gap path 111 corresponding to an excitation path 22 of a substantially stiff membrane 10.
    The membrane 10 has a plurality of structure paths 24 each single structure path 24 substantially extending between the excitation path 22 and the suspension path 20 and along each individual structure path 24 being non-flush structures 26 to the otherwise flush outward face 12.
    The projections of the suspension path 20 and the excitation path 22 on the outward face 12 are symmetric about a symmetry point 40 and wherein the projection of the structure paths 24 has the shape of a curve section 54 (not shown) of one or more curves 50 (not shown) or approximations thereto and chosen amongst:
    a Fibonacci spiral, a golden spiral, an Archimedean spiral, a Euler spiral, a Fermat's spiral, a hyperbolic spiral, a logarithmic spiral, or combinations thereof.
    The membrane 10 is suspended at the outer periphery 30 by a suspender 140. The suspender 140 has a structure path 24 wherein each single structure path 24 has the shape of a curve section 54 (not shown) of one or more curves 50 (not shown) or approximations thereto and chosen amongst:
    DK 2018 70191 A1 a Fibonacci spiral, a golden spiral, an Archimedean spiral, a Euler spiral, a Fermat's spiral, a hyperbolic spiral, a logarithmic spiral, or combinations thereof.
    Fig. 3 illustrates another shallow subwoofer 100 having a star-shaped magnetic ends 167A, 167B.
    The figure discloses a top view and a side view of the shallow subwoofer.
    The shallow subwoofer 100 has a chassis 130 and a membrane 10. The membrane 10 has a plurality of structure paths 24 each single structure path 24 substantially extending between the excitation path 22 and the suspension path 20 and along each individual structure path 24 being non-flush structures 26 to the otherwise flush outward face 12.
    The membrane 10 has a plurality of structure paths 24 each single structure path 24 substantially extending between the excitation path 22 and the suspension path 20 and along each individual structure path 24 being non-flush structures 26 to the otherwise flush outward face 12.
    The projections of the suspension path 20 and the excitation path 22 on the outward face 12 are symmetric about a symmetry point 40 and wherein the projection of the structure paths 24 has the shape of a curve section 54 of one or more curves 50 or approximations thereto and chosen amongst:
    a Fibonacci spiral, a golden spiral, an Archimedean spiral, a Euler spiral, a Fermat's spiral,
    DK 2018 70191 A1 a hyperbolic spiral, a logarithmic spiral, or combinations thereof.
    The membrane 10 is suspended at the outer periphery 30 by a suspender 140. The suspender 140 has a structure path 24 wherein each single structure path 24 has the shape of a curve section 54 of one or more curves 50 or approximations thereto and chosen amongst:
    a Fibonacci spiral, a golden spiral, an Archimedean spiral, a Euler spiral, a Fermat's spiral, a hyperbolic spiral, a logarithmic spiral, or combinations thereof.
    The pole piece 160 arrangement comprises a first pole 162A and a second pole 162B, the first pole 162A and the second pole 162B are complementary star-shaped magnetic ends 167A, 167B wherein each leg has a recess for complementary engagement with the magnet 122.
    The pole piece arrangement 160 has an aperture in-between the second pole 162B.
    The first and second magnetic ends 167A, 167B are arranged outside the chassis 130 and the first and second voice coil ends 163 are arrange inside the chassis 130.
    In an embodiment the chassis 130 is made of a non-magnetic metal such as alumini um.
    权利要求:
    Claims (10)
    [1] 1. A shallow subwoofer (100) type of loudspeaker, the shallow subwoofer (100) having a chassis (130) and comprising a membrane (10) with voice coil (150) along an excitation path (22) arranged to interact with a pole piece (160) arrangement comprising a first pole (162A) with a voice coil end (163) with a first pole face (164A) and a second pole (162B) with a voice coil end (163) with a second face (164B), which first and second faces (164A, 164B) are configured to form a gap (110) along an gap path (111) and to magnetically interacting with the voice coil (150) wherein the first pole (162A) has a multiple first magnet ends (167A) and the second pole (162B) has corresponding multiple second magnet ends (167B), where a corresponding first and second magnet ends (167A, 167B) are configured to couple with a magnet (122).
    [2] 2. The shallow subwoofer (100) according to claim 1, wherein the first pole (162A) and the second pole (162B) are complementary star-shaped magnetic ends (167A, 167B) wherein each leg has a recess for complementary engagement with the magnet (122).
    [3] 3. The shallow subwoofer (100) according to any one or more of the preceding claims, wherein the first and second magnetic ends (167A, 167B) are arranged outside the chassis (130) and the first and second voice coil ends (163) are arrange inside the chassis (130).
    In an embodiment the chassis is made of a non-magnetic metal such as aluminium.
    [4] 4. The shallow subwoofer (100) according to any one or more of the preceding claims, wherein one, more or all magnets (122) are symmetrical about the magnetisation axis (N-S-axis); including spherically formed magnets (122).
    [5] 5. The shallow subwoofer (100) according to any one or more of the preceding claims, wherein one, more or all magnets (122) have point like pole ends at the respective Npole and S-pole.
    DK 2018 70191 A1
    [6] 6. The shallow subwoofer (100) according to any one or more of the preceding claims, wherein the first and second pole faces (164A, 164B) are configured to form the gap (110) and the gap path (111) corresponding to an excitation path (22) of a substantially stiff membrane (10), wherein the membrane (10) has a plurality of structure paths (24) each single structure path (24) substantially extending between the excitation path (22) and the suspension path (20) and along each individual structure path (24) being non-flush structures (26) to the otherwise flush outward face (12) wherein the projection of the structure paths (24) has the shape of a curve section (54) of one or more curves (50) or approximations thereto and chosen amongst:
    a Fibonacci spiral, a golden spiral, an Archimedean spiral, a Euler spiral, a Fermat's spiral, a hyperbolic spiral, a logarithmic spiral, or combinations thereof.
    [7] 7. The shallow subwoofer (100) according to any one or more of the preceding claims, wherein the membrane (10) is suspended at the outer periphery (30) by a suspender (140), which suspender has a structure path (24) wherein each single structure path (24) has the shape of a curve section (54) of one or more curves (50) or approximations thereto and chosen amongst:
    a Fibonacci spiral, a golden spiral, an Archimedean spiral, a Euler spiral, a Fermat's spiral, a hyperbolic spiral, a logarithmic spiral, or combinations thereof.
    DK 2018 70191 A1
    [8] 8. A pole piece arrangement (160) for an audible range loudspeaker and comprising a first pole (162A) with a voice coil end (163) with a first pole face (164A) and a second pole (162B) with a voice coil end (163) with a second face (164B), which first and second faces (164A, 164B) are configured to form a gap (110) along an activation periphery (116) and to magnetically interacting with the voice coil (150) wherein the first pole (162A) has a multiple first magnet ends (167A) and the second pole (162B) has corresponding multiple second magnet ends (167B), where a corresponding first and second magnet ends (167A, 167B) are configured to couple with a magnet (122).
    [9] 9. The pole piece arrangement (160) according to claim 8, wherein the first pole (162A) and the second pole (162B) are complementary star-shaped magnetic ends (167A, 167B) wherein each leg has a recess for complementary engagement with the magnet (122).
    [10] 10. The pole piece arrangement (160) according to claim 9, wherein the first and second voice coil ends (163) have opposing first and second pole faces (164A, 164B), the faces (164A, 164B) being substantially perpendicular to the legs of the star; and the first and second pole faces (164A, 164B) encircling an aperture (32) substantially in the centre of the star.
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    同族专利:
    公开号 | 公开日
    DK179960B1|2019-11-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2019-11-04| PAT| Application published|Effective date: 20190929 |
    2019-11-04| PME| Patent granted|Effective date: 20191104 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201870191A|DK179960B1|2018-03-28|2018-03-28|Shallow Subwoofer|DKPA201870191A| DK179960B1|2018-03-28|2018-03-28|Shallow Subwoofer|
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