Loudspeaker assembly

Abstract

The utility model relates to a loudspeaker assembly, comprising a vibration unit comprising a voice coil (108) which is provided with two windings which are mutually staggered along the axial direction; the magnetic circuit unit (120) comprises at least one magnet and a plurality of magnetic conduction pieces and defines two magnetic gaps which are mutually staggered in the axial direction, the two windings of the voice coil (108) are suspended in the two magnetic gaps respectively, the magnetic conduction pieces comprise an inner magnetic conduction piece (132) located on the radial inner side of the voice coil (108) and an outer magnetic conduction piece (130) located on the radial outer side of the voice coil (108), and the inner magnetic conduction piece (132) and the outer magnetic conduction piece (130) are mutually staggered in the axial direction. The magnet comprises a first magnet body (122) located between the inner magnetic conductive piece (132) and the outer magnetic conductive piece (130) in the radial direction, and the magnetic pole direction of the first magnet body extends in the radial direction. Compared with the condition that the magnetic pole direction of the permanent magnet in the existing product extends along the axial direction, the loudspeaker assembly provided by the utility model has the advantages that the same sound quality is maintained, the use amount of the permanent magnet is obviously reduced, and the cost is obviously reduced.

Description

Technical Field

[0001] The utility model relates to a loudspeaker assembly, and more particularly to a loudspeaker assembly with a double-winding voice coil. Background Art

[0002] The magnetic circuit structure of most electrodynamic loudspeakers concentrates the magnetic flux generated by permanent magnets into an annular magnetic gap. A voice coil is placed within the gap. When electrical energy flows into the voice coil, it generates an induced magnetic field that interacts with the magnetic flux in the gap. The voice coil carries current in a direction substantially perpendicular to the direction of the magnetic flux generated by the magnets. This interaction between the voice coil current and the magnetic flux causes the voice coil to oscillate linearly within the length of the gap, moving the diaphragm to produce audible sound.

[0003] The voice coil of a traditional permanent magnet electrodynamic speaker typically consists of only one winding. Some high-end speakers achieve higher power by using a dual-winding voice coil. Two lengths of wire are wound together around a common bobbin, forming two independent windings, each operating in a separate annular magnetic gap. These windings are of equal length, have the same number of turns, and exhibit identical conductive properties. This dual-winding voice coil doubles the electromotive force generated by the same current, thereby improving efficiency.

[0004] The market still needs a speaker assembly with a dual-winding voice coil, which can provide the same sound quality as existing similar speaker products but has lower cost and more optimized structure. Utility Model Content

[0005] The utility model provides a loudspeaker assembly. The loudspeaker assembly has a double-winding voice coil and has a more optimized structure and lower cost compared to existing products.

[0006] According to one aspect of the utility model, a speaker assembly is provided, comprising: a vibration unit, comprising a voice coil, the voice coil having two windings staggered along the axial direction; a magnetic circuit unit, comprising at least one magnet and a plurality of magnetic conductive parts, defining two magnetic gaps staggered along the axial direction, the two windings of the voice coil are respectively suspended in the two magnetic gaps, wherein the magnetic conductive parts include an inner magnetic conductive part located radially inside the voice coil and an outer magnetic conductive part located radially outside the voice coil, the magnet includes a first magnet located radially between the inner magnetic conductive part and the outer magnetic conductive part, and the magnetic pole direction of the first magnet extends radially.

[0007] According to one or more embodiments of the present invention, the magnet further includes a second magnet radially located between the inner magnetic conductive member and the outer magnetic conductive member and axially staggered from the first magnet, and the magnetic pole direction of the second magnet extends radially.

[0008] According to one or more embodiments of the present invention, the first magnet at least partially overlaps one of the two magnetic gaps in the radial direction, and the second magnet at least partially overlaps the other of the two magnetic gaps in the radial direction.

[0009] According to one or more embodiments of the present invention, the first magnet and the second magnet are both positioned on the inner magnetic conductive member, or are both positioned on the outer magnetic conductive member.

[0010] According to one or more embodiments of the present invention, one of the first magnet and the second magnet is positioned on the inner magnetic conductive member, and the other is positioned on the outer magnetic conductive member.

[0011] According to one or more embodiments of the present invention, the inner magnetic conductive member and the outer magnetic conductive member are each independently connected to a corresponding magnet at one axial end on the side facing the voice coil, and are each configured with a radial protrusion at the other axial end.

[0012] According to one or more embodiments of the present invention, the radial protrusion is a part of the corresponding magnetic conductive member and is axially symmetrical with the corresponding magnet.

[0013] According to one or more embodiments of the present invention, at least one of the first magnet and the second magnet is configured as an integral or spliced ring, or as a plurality of arc segments distributed along the circumference and separated from each other.

[0014] According to one or more embodiments of the present invention, at least one of the inner magnetic conductive member and the outer magnetic conductive member is provided with a chamfer at an end portion on a side away from the voice coil.

[0015] According to one or more embodiments of the present invention, the voice coil further includes a skeleton, and the two windings are respectively wound on the skeleton.

[0016] According to one or more embodiments of the present invention, the speaker assembly further includes: a frame connected to the vibration unit and the magnetic circuit unit respectively, the frame respectively supporting the inner magnetic conductive part and the outer magnetic conductive part and being made of non-magnetic conductive material.

[0017] According to one or more embodiments of the present invention, the diameter of the speaker assembly is not less than 10 centimeters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematically shows a cross-sectional view of a speaker assembly according to one or more embodiments of the present invention;

[0019] Figure 2 Schematically shows the Figure 1 a cross-sectional view of a magnetic circuit unit and a voice coil of a loudspeaker assembly;

[0020] Figure 3 The figure schematically shows a magnetic circuit unit of a speaker assembly according to one or more embodiments, wherein the first magnet and the second magnet of the magnetic circuit unit are both positioned on the inner magnetic conductive member;

[0021] Figure 4 The figure schematically shows a magnetic circuit unit of a speaker assembly according to one or more embodiments, wherein the first magnet of the magnetic circuit unit is positioned on the inner magnetic conductive member, and the second magnet is positioned on the outer magnetic conductive member. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings. The same or similar reference numerals in the various figures represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0023] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the field to which the present invention belongs. In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In this document, the term "axis" refers to the central axis x of the loudspeaker assembly, the term "axial" or "axial direction" refers to the direction along the axis of the loudspeaker, the term "radial" or "radial direction" refers to a direction generally perpendicular to the axis, pointing toward or away from the axis, the term "radially inside" or "radially inside" refers to a component, part, position, or direction relatively close to the axis, and the term "radially outside" or "radially outside" refers to a component, part, position, or direction relatively far from the axis. The terms "upper," "lower," "top," and "bottom" are relative to the axial direction. "Up" and "top" refer to components, parts, positions, or directions that are relatively close to or facing the vibration unit of the loudspeaker assembly in the axial direction. "Lower" and "bottom" refer to components, parts, positions, or directions that are relatively close to or facing the magnetic circuit unit of the loudspeaker assembly in the axial direction.

[0025] The utility model provides a loudspeaker assembly, comprising: a voice coil, comprising two windings staggered along the axial direction; a magnetic circuit unit, comprising at least one magnet and a plurality of magnetic conductive parts, defining two magnetic gaps staggered along the axial direction, wherein the two windings of the voice coil are respectively suspended in the two magnetic gaps, wherein the magnetic conductive parts comprise an inner magnetic conductive part located radially inside the voice coil and an outer magnetic conductive part located radially outside the voice coil, and the magnet comprises a first magnet located radially between the inner magnetic conductive part and the outer magnetic conductive part, and the magnetic pole direction of the first magnet extends radially.

[0026] Here, the term "magnetic pole direction" refers to the arrangement direction or placement direction of the north and south poles of the permanent magnets. The term "magnet" refers to a permanent magnet.

[0027] In the magnetic circuit unit used in conventional dual-winding voice coils, the permanent magnet has axially extending north and south poles. Magnetic conductors attached to either axial side of the permanent magnet guide the permanent magnet's magnetic flux into the magnetic gap. A design flaw in this magnetic circuit unit is that it only utilizes the magnetic flux at the edges of the cylindrical permanent magnet near the magnetic gap, while the magnetic flux in the center, located farther from the magnetic gap, remains unused.

[0028] According to the design of the present invention, at least one permanent magnet is radially positioned between the inner and outer magnetic conductive members. The magnetic poles of the permanent magnet are arranged to extend radially, placing the entire area of the permanent magnet close to the magnetic gap. As a result, the magnetic flux lines of the permanent magnet can fully or substantially fully enter the magnetic flux loop, forming two magnetic gaps. Compared to existing products where the magnetic poles of the permanent magnets extend axially, the speaker assembly of the present invention significantly reduces the number of permanent magnets, for example, by approximately 20%, while providing the same magnetic field strength and speaker sound quality. This significantly reduces costs and optimizes the structure.

[0029] Figure 1 A cross-sectional view of a speaker assembly 100 according to one or more embodiments of the present invention is schematically shown. The speaker assembly 100 includes a vibration unit 110, a magnetic circuit unit 120, and a frame 150. The vibration unit 110 includes a voice coil 108, a drum paper 102, a dust cap 104, and a spring 106. The magnetic circuit unit 120 includes a first magnet 122, a second magnet 124, an inner magnetic conductive part 132, and an outer magnetic conductive part 130. The frame 150, also known as a basin frame, is connected to the vibration unit 110 and the magnetic circuit unit 120, respectively, to provide support for them.

[0030] One end of the voice coil 108 is suspended in the magnetic gap of the magnetic circuit unit 120. When an audio signal is transmitted to the voice coil 108, the magnetic field in the magnetic gap generates a force on the audio signal current passing through the voice coil 108. This force drives the voice coil 108 and, in turn, the drum paper 102 and other components to vibrate axially, thereby causing the speaker assembly 100 to produce sound.

[0031] Figure 2 Schematically shows the Figure 1 A cross-sectional view of the magnetic circuit unit 120 and voice coil 108 in a speaker assembly is shown. As can be seen more clearly here, the magnetic circuit unit 120 defines two annular magnetic gaps, including a first magnetic gap 136 located above and a second magnetic gap 138 located below. The first magnetic gap 136 and the second magnetic gap 138 are axially offset from each other and should have substantially the same radial and axial dimensions, or be axially symmetrical, to provide substantially the same magnetic field strength. The voice coil 108 accordingly has two windings: a first winding 108a suspended in the first magnetic gap 136 and a second winding 108b suspended in the second magnetic gap 138. The voice coil 108 also includes a bobbin 108c, with the first winding 108a and the second winding 108b respectively disposed on the bobbin 108c. Both windings are shown here as being wound around the outside of the bobbin 108c. In one or more embodiments of the present invention, both windings may be wound around the inside of the bobbin 108c. In one or more embodiments of the present invention, the wires may be wound around the inner and outer sides of the skeleton 108c.

[0032] In the magnetic circuit unit 120, the first magnet 122 and the second magnet 124, which is axially offset from the first magnet 122, are both radially located between the inner magnetic conductive member 132 and the outer magnetic conductive member 130 and are respectively connected to the inner magnetic conductive member 132, for example, by bonding. The magnetic pole directions of the first magnet 122 and the second magnet 124 both extend radially. The first magnet 122 at least partially overlaps with the first magnetic gap 136 in the radial direction, and the second magnet 124 at least partially overlaps with the second magnetic gap 138 in the radial direction. Here, "at least partially overlap" includes both complete overlap and partial overlap. For example, when the magnet is in a complete annular shape, the magnet and the magnetic gap should completely overlap when viewed in the radial direction, while when the magnet is designed as a multi-segment design separated from each other, the magnet and the magnetic gap should only partially overlap when viewed in the radial direction.

[0033] The relative positions of the inner magnetic conductive member 132 and the outer magnetic conductive member 130 are based on the annular voice coil 108. They are located on both sides of the voice coil 108, and there is no direct connection between the inner magnetic conductive member 132 and the outer magnetic conductive member 130. Figure 1As shown, the inner magnetic conductive member 132 and the outer magnetic conductive member 130 are respectively supported on a frame 150. The frame 150 can be made of a material that does not conduct magnetic flux, such as aluminum or plastic, so that magnetic flux can be conducted between the inner magnetic conductive member 132 and the outer magnetic conductive member 130 only at the first magnetic gap 136 and the second magnetic gap 138. In one or more embodiments of the present invention, the frame 150 can also be made of iron, but in this case, some magnetic flux will be lost.

[0034] In this embodiment, the magnetic circuit unit 120 includes a first magnet 122 and a second magnet 124. Both magnets are located between the inner magnetic conductive member 132 and the outer magnetic conductive member 130 and have radially extending magnetic poles. This arrangement helps ensure that the magnetic field strengths in the first magnetic gap 136 and the second magnetic gap 138 are the same or substantially the same. In one or more embodiments of the present invention, the magnetic circuit unit 120 may include only the first magnet 122. In this case, the functions of the speaker assembly 100 can still be achieved. In this case, the space occupied by the second magnet 124 can be replaced by a corresponding magnetic conductive member.

[0035] In this embodiment, the first magnet 122 and the second magnet 124 are radially located on the same side of the voice coil 108, and are both positioned on the inner magnetic conductive member 132. In one or more embodiments of the present invention, it is contemplated that the first magnet 122 and the second magnet 124 are both positioned on the outer magnetic conductive member 130. In one or more embodiments of the present invention, the first magnet 122 and the second magnet 124 may also be located on different sides of the voice coil 108, that is, one is positioned on the inner magnetic conductive member 132 and the other is positioned on the outer magnetic conductive member 130.

[0036] In this embodiment, the first magnet 122 and the second magnet 124 are respectively positioned at two axial ends of the inner magnetic conductive member 132. In one or more embodiments of the present invention, the first magnet 122 and the second magnet 124 are respectively positioned at two axial ends of the outer magnetic conductive member 130.

[0037] In this embodiment, the first magnet 122 and the second magnet 124 can be configured as a single-piece ring or a spliced ring. In one or more embodiments of the present invention, the first magnet 122 and the second magnet 124 can be configured as a plurality of arc segments distributed circumferentially and spaced apart from each other. A multi-segment magnet design is easier to magnetize than a single-piece magnet and is therefore more convenient for practical production.

[0038] In this embodiment, the inner magnetic conductive member 132 has a bevel 132a on the side away from the voice coil 108, and the outer magnetic conductive member 130 has a bevel 130a on the side away from the voice coil 108. This design is conducive to collecting and concentrating magnetic lines of force.

[0039] In this embodiment, the radial thicknesses of the inner magnetic conductive member 132 and the outer magnetic conductive member 130 are respectively adapted to the axial dimensions of the first magnet 122 and the second magnet 124. This design facilitates the conduction of magnetic lines of force.

[0040] Figure 3 The magnetic circuit unit 120 of the speaker assembly 100 according to one or more embodiments is schematically shown, wherein the first magnet 122 and the second magnet 124 of the magnetic circuit unit are both positioned on the inner magnetic conductive member 132 . Figure 3 The lower part is an enlarged view of the part circled in the upper part, from which the magnetic flux loop 126 shown by the dotted line can be seen. The magnetic lines of force of the first magnet 122 and the second magnet 124 all or substantially all enter the magnetic flux loop to form the first magnetic gap 136 and the second magnetic gap 138.

[0041] Figure 4 The magnetic circuit unit 120 of the speaker assembly 100 according to one or more embodiments is schematically illustrated. The first magnet 122 of the magnetic circuit unit is positioned on an inner magnetic permeable member 132, and the second magnet 124 is positioned on an outer magnetic permeable member 130. The inner magnetic permeable member 132 has the first magnet 122 connected to one axial end on the side facing the voice coil 108, and a first radial protrusion 132b is configured at the other axial end. The first radial protrusion 132b is an integral component of the inner magnetic permeable member 132 and has an axially symmetrical structure with the first magnet 122. The outer magnetic permeable member 130 has the second magnet 124 connected to one axial end on the side facing the voice coil 108, and a second radial protrusion 130b is configured at the other axial end. The second radial protrusion 130b is an integral component of the outer magnetic permeable member 130 and has an axially symmetrical structure with the second magnet 124. This arrangement achieves substantially axially symmetrical first and second magnetic gaps 136 and 138. Figure 4 The lower portion is an enlarged view of the circled portion of the upper portion, showing the dotted magnetic flux loop 126. The magnetic flux lines of first magnet 122 and second magnet 124 all or substantially all enter the magnetic flux loop, thereby forming first magnetic gap 136 and second magnetic gap 138. Therefore, compared to existing products in which the magnetic poles of the permanent magnets extend axially, the speaker assembly of the present invention can significantly reduce the number of permanent magnets used, for example, by approximately 20%, while maintaining the same magnetic gap magnetic field strength and speaker sound quality. This significantly reduces costs and optimizes the structure.

[0042] According to one or more embodiments of the present invention, the diameter of the speaker assembly 100 is not less than 10 cm. The speaker assembly of the present invention is generally a high-power product, and its diameter can be up to 40 cm, for example.

[0043] The present invention can be implemented in the following ways:

[0044] Item 1: A loudspeaker assembly, comprising:

[0045] A vibration unit including a voice coil having two windings staggered with each other in the axial direction;

[0046] The magnetic circuit unit includes at least one magnet and a plurality of magnetic conductive parts, defining two magnetic gaps staggered from each other in the axial direction, and the two windings of the voice coil are suspended in the two magnetic gaps respectively.

[0047] The magnetic conductive part includes an inner magnetic conductive part located radially inside the voice coil and an outer magnetic conductive part located radially outside the voice coil, and the magnet includes a first magnet located radially between the inner magnetic conductive part and the outer magnetic conductive part, and the magnetic pole direction of the first magnet extends radially.

[0048] Item 2: The speaker assembly according to Item 1 is characterized in that the magnet also includes a second magnet radially located between the inner magnetic conductive part and the outer magnetic conductive part and axially offset from the first magnet, and the magnetic pole direction of the second magnet extends radially.

[0049] Item 3: The speaker assembly according to Item 1 or 2, characterized in that the first magnet radially overlaps with one of the two magnetic gaps, and the second magnet radially overlaps with the other of the two magnetic gaps.

[0050] Item 4: The speaker assembly according to any one of Items 1 to 3, characterized in that the first magnet and the second magnet are both positioned on the inner magnetic conductive member, or are both positioned on the outer magnetic conductive member.

[0051] Item 5: The speaker assembly according to any one of Items 1 to 4, characterized in that one of the first magnet and the second magnet is positioned on the inner magnetic conductive member, and the other is positioned on the outer magnetic conductive member.

[0052] Item 6: The loudspeaker assembly according to any one of Items 1 to 5, characterized in that the inner magnetic conductive member and the outer magnetic conductive member are each independently connected to a corresponding magnet at one axial end on the side facing the voice coil, and are constructed with a radial protrusion at the other axial end.

[0053] Item 7: The loudspeaker assembly according to any one of Items 1 to 6, characterized in that the radial protrusion is part of the corresponding magnetic conductive member and is axially symmetrical with the corresponding magnet.

[0054] Item 8: The speaker assembly according to any one of Items 1 to 7, characterized in that at least one of the first magnet and the second magnet is configured as an integral or spliced ring or as a plurality of arc segments distributed circumferentially and separated from each other.

[0055] Item 9: The loudspeaker assembly according to any one of Items 1 to 8, wherein at least one of the inner magnetic conductive member and the outer magnetic conductive member is provided with a chamfer at an end portion on a side away from the voice coil.

[0056] Item 10: The loudspeaker assembly according to any one of Items 1 to 9, characterized in that the voice coil further includes a skeleton, and the two windings are respectively wound on the skeleton.

[0057] Item 11: The speaker assembly according to any one of items 1 to 10, characterized in that the speaker assembly further comprises: a frame connected to the vibration unit and the magnetic circuit unit respectively, the frame respectively supporting the inner magnetic conductive part and the outer magnetic conductive part and being made of non-magnetic conductive material.

[0058] The above description is merely an exemplary embodiment for illustrating the principle of the present invention and is not intended to limit the scope of protection of the present invention. Those skilled in the art may make various modifications and improvements without departing from the spirit and essence of the present invention, and such modifications and improvements are also within the scope of protection of the present invention.

Claims

1. A speaker assembly, characterized in that include: A vibration unit (110) includes a voice coil (108), wherein the voice coil has two windings that are staggered with each other in the axial direction; The magnetic circuit unit (120) comprises at least one magnet and a plurality of magnetic conductive parts and defines two magnetic gaps staggered in the axial direction, wherein the two windings of the voice coil (108) are respectively suspended in the two magnetic gaps. The magnetic conductive part includes an inner magnetic conductive part (132) located radially inside the voice coil (108) and an outer magnetic conductive part (130) located radially outside the voice coil (108); the magnet includes a first magnet (122) located radially between the inner magnetic conductive part (132) and the outer magnetic conductive part (130); and the magnetic pole direction of the first magnet extends radially.

2. The loudspeaker assembly according to claim 1, wherein The magnet further comprises a second magnet (124) radially located between the inner magnetic conductive part (132) and the outer magnetic conductive part (130) and axially staggered from the first magnet (122), wherein the magnetic pole direction of the second magnet extends radially.

3. The loudspeaker assembly according to claim 2, wherein The first magnet (122) at least partially overlaps one of the two magnetic gaps in the radial direction, and the second magnet (124) at least partially overlaps the other of the two magnetic gaps in the radial direction.

4. The loudspeaker assembly according to claim 2, wherein The first magnet (122) and the second magnet (124) are both positioned on the inner magnetic conductive part (132), or are both positioned on the outer magnetic conductive part (130).

5. The loudspeaker assembly according to claim 2, wherein: One of the first magnet (122) and the second magnet (124) is positioned on the inner magnetic conductive part (132), and the other is positioned on the outer magnetic conductive part (130).

6. The loudspeaker assembly according to claim 5, wherein: The inner magnetic conductive part (132) and the outer magnetic conductive part (130) are each independently connected to a corresponding magnet at one axial end on the side facing the voice coil (108), and are constructed with a radial protrusion at the other axial end.

7. The loudspeaker assembly according to claim 6, wherein: The radial protrusion is a part of the corresponding magnetic conductive member and is axially symmetrical with the corresponding magnet.

8. The loudspeaker assembly according to claim 2, wherein: At least one of the first magnet (122) and the second magnet (124) is configured as an integral or spliced ring, or as a plurality of arc segments distributed circumferentially and spaced apart from each other.

9. The loudspeaker assembly according to claim 1, wherein At least one of the inner magnetic conductive part (132) and the outer magnetic conductive part (130) is provided with a chamfer at an end portion on a side away from the voice coil (108).

10. The loudspeaker assembly according to claim 1, wherein The voice coil (108) further comprises a skeleton (108c), and the two windings are respectively wound on the skeleton.

11. The loudspeaker assembly according to claim 1, wherein The loudspeaker assembly further comprises a frame (150) connected to the vibration unit (110) and the magnetic circuit unit (120), respectively, the frame supporting the inner magnetic conductive part (132) and the outer magnetic conductive part (130) and being made of a non-magnetic conductive material.

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