Loudspeaker magnet assembly
AssigneeHarman International Industries, Incorporated
InventorBrendon Stead
Life of this patent
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Abstract
A loudspeaker magnet assembly for a loudspeaker transducer having a voice coil is provided that has a low profile construction. The loudspeaker magnet assembly may include: a first magnet assembly; top plate position below the first magnet assembly; second magnet assembly positioned below the top plate; and bottom plate positioned below the second magnet assembly. The first magnet assembly may include an annular outer magnet and a circular inner magnet. The top plate may include an annular outer top plate and a circular inner top plate and the second magnet assembly may include an annular outer magnet and a circular inner magnet.
Claims21
A loudspeaker magnet assembly for a loudspeaker transducer having a voice coil, surround suspension member, and diaphragm, the loudspeaker magnet assembly comprising:
- a first magnet assembly, wherein the first magnet assembly includes
- an annular outer magnet having an outer diameter and an inner diameter and wherein the inner diameter defines a vacant circular center within the annular outer magnet,
- a circular inner magnet having a diameter less than the inner diameter of the annular outer magnet,
- wherein the circular inner magnet is positioned concentrically within the vacant circular center of the annular outer magnet, and
- wherein the difference in length between the diameter of the circular inner magnet and the inner diameter of annular outer magnet define an annular first magnet assembly air gap;
- a top plate positioned below the first magnet assembly, the top plate including
- an annular outer top plate having an outer diameter and an inner diameter and wherein the inner diameter defines a vacant circular center within the annular outer top plate,
- a circular inner top plate having a diameter less than the inner diameter of the annular outer top plate,
- wherein the circular inner top plate is positioned concentrically within the vacant circular center of the annular outer top plate, and
- wherein the difference in length between the diameter of the circular inner top plate and the inner diameter of annular outer top plate define an annular top plate air gap;
- a second magnet assembly positioned below the top plate, the second magnet assembly including
- an annular outer magnet having an outer diameter and an inner diameter and wherein the inner diameter defines a vacant circular center within the annular outer magnet,
- a circular inner magnet having a diameter less than the inner diameter of the annular outer magnet,
- wherein the circular inner magnet is positioned concentrically within the vacant circular center of the annular outer magnet, and
- wherein the difference in length between the diameter of the circular inner magnet and the inner diameter of annular outer magnet define an annular second magnet assembly air gap;
- and
- a bottom plate positioned below the second magnet assembly,
- wherein the diameter of the circular inner magnet, of the first magnet assembly, coincides with the diameters of the circular inner top plate and circular inner magnet of the second magnet assembly, such that the first magnet assembly air gap, top plate air gap, and second magnet assembly air gap are aligned and define a magnetic air gap,
- wherein the magnetic air gap is configured to receive the voice coil.
A loudspeaker magnet assembly for a loudspeaker transducer having a voice coil, surround suspension member, and diaphragm, the loudspeaker magnet assembly comprising:
- a first magnet assembly, wherein the first magnet assembly includes
- an annular outer magnet having an outer diameter and an inner diameter and wherein the inner diameter defines a vacant circular center within the annular outer magnet,
- a circular inner magnet having a diameter less than the inner diameter of the annular outer magnet,
- wherein the circular inner magnet is positioned concentrically within the vacant circular center of the annular outer magnet,
- wherein the difference in length between the diameter of the circular inner magnet and the inner diameter of annular outer magnet define an annular first magnet assembly air gap, and
- wherein the circular inner magnet includes a central bore;
- a top plate positioned below the first magnet assembly, the top plate including
- an annular outer top plate having an outer diameter and an inner diameter and wherein the inner diameter defines a vacant circular center within the annular outer top plate,
- a circular inner top plate having a diameter less than the inner diameter of the annular outer top plate,
- wherein the circular inner top plate is positioned concentrically within the vacant circular center of the annular outer top plate, and
- wherein the difference in length between the diameter of the circular inner top plate and the inner diameter of annular outer top plate define an annular top plate air gap, and
- wherein the circular inner top plate includes a central bore;
- a second magnet assembly positioned below the top plate, the second magnet assembly including
- an annular outer magnet having an outer diameter and an inner diameter and wherein the inner diameter defines a vacant circular center within the annular outer magnet,
- a circular inner magnet having a diameter less than the inner diameter of the annular outer magnet,
- wherein the circular inner magnet is positioned concentrically within the vacant circular center of the annular outer magnet, and
- wherein the difference in length between the diameter of the circular inner magnet and the inner diameter of annular outer magnet define an annular second magnet assembly air gap, and
- wherein the circular inner magnet includes a central bore;
- and
- a bottom plate positioned below the second magnet assembly, wherein the bottom plate includes a central bore;
- and
- a plug configured to fit within the central bores of the bottom plate, circular inner magnet of the second magnet assembly, circular inner top plate, and circular inner magnet of the first magnet assembly,
- wherein the diameter of the circular inner magnet, of the first magnet assembly, coincides with the diameters of the circular inner top plate and circular inner magnet of the second magnet assembly, such that the first magnet assembly air gap, top plate air gap, and second magnet assembly air gap are aligned and define a magnetic air gap, and
- wherein the magnetic air gap is configured to receive the voice coil.
A loudspeaker magnet assembly for a loudspeaker transducer having a voice coil, surround suspension member, and diaphragm, the loudspeaker magnet assembly comprising:
- a baffle having a central bore;
- a first magnet assembly, wherein the first magnet assembly includes a central bore;
- a top plate positioned below the first magnet assembly, the top plate including
- an annular outer top plate having an outer diameter and an inner diameter and wherein the inner diameter defines a vacant circular center within the annular outer top plate,
- a circular inner top plate having a diameter less than the inner diameter of the annular outer top plate,
- wherein the circular inner top plate is positioned concentrically within the vacant circular center of the annular outer top plate, and
- wherein the difference in length between the diameter of the circular inner top plate and the inner diameter of annular outer top plate define an annular top plate air gap, and
- wherein the circular inner top plate includes a central bore;
- a second magnet assembly positioned below the top plate, the second magnet assembly including
- an annular outer magnet having an outer diameter and an inner diameter and wherein the inner diameter defines a vacant circular center within the annular outer magnet,
- a circular inner magnet having a diameter less than the inner diameter of the annular outer magnet,
- wherein the circular inner magnet is positioned concentrically within the vacant circular center of the annular outer magnet, and
- wherein the difference in length between the diameter of the circular inner magnet and the inner diameter of annular outer magnet define an annular second magnet assembly air gap, and
- wherein the circular inner magnet includes a central bore;
- and
- a bottom plate positioned below the second magnet assembly, wherein the bottom plate includes a central bore;
- and
- a plug configured to fit within the central bores of the bottom plate, circular inner magnet of the second magnet assembly, circular inner top plate, and circular inner magnet of the first magnet assembly,
- wherein the diameter of the first magnet assembly, coincides with the diameters of the circular inner top plate and circular inner magnet of the second magnet assembly, such that the top plate air gap and second magnet assembly air gap are aligned and define a magnetic air gap,
- wherein the magnetic air gap is configured to receive the voice coil.
Dependencies are inferred from the claim text.