Voice coil and speaker module

Abstract

The present application provides a voice coil and a speaker module. The voice coil in the present application comprises N winding layers formed by winding from inside to outside around a first axis, N being an integer greater than 1. Adjacent winding layers are connected by means of winding switching portions. The winding switching portions are arranged in a dispersed manner along a winding path of the voice coil, and projections of the winding switching portions on a plane perpendicular to the first axis along the first axis do not overlap with each other. According to the voice coil of the present application, the arrangement positions of the winding switching portions formed between adjacent winding layers are adjusted, such that the winding switching portions are arranged in a staggered manner, and the projections of the winding switching portions on the plane perpendicular to the first axis in a first axial direction do not overlap with each other. The dispersed arrangement of the positions of the winding switching portions prevents centralized arrangement in the thickness direction of the voice coil, thereby reducing the overall wall thickness of the voice coil and reducing a magnetic gap. When applied to a speaker assembly, the conversion efficiency and sensitivity of the speaker assembly are improved.

Description

Voice coil and loudspeaker module TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic conversion devices, in particular to a voice coil and a loudspeaker module. BACKGROUND

[0002] The voice coil of the loudspeaker module in the prior art is composed of N layers of winding layers 210 arranged from the inside to the outside. Since the N layers of winding layers 210 are wound by one enameled wire, a winding switching part is formed when the layer is changed from the Nth layer to the N+1th layer during winding. Referring to FIGS. 1 and 2, the winding switching part of the voice coil in the prior art is centrally arranged on the corresponding area from the inside to the outside, so that the wall thickness of the corresponding area of the voice coil and the winding switching part increases due to the stacking from the inside to the outside, which occupies a large amount of magnetic gap space and affects the magnetic gap, thereby reducing the sensitivity of the loudspeaker module.

[0003] Therefore, it is necessary to provide a voice coil capable of reducing the influence on the magnetic gap and improving the sensitivity of the loudspeaker module, and a loudspeaker module having the voice coil. TECHNICAL PROBLEM

[0004] The purpose of the present application is to provide a voice coil and a loudspeaker module to improve the compactness of the voice coil, reduce the influence of the voice coil on the magnetic gap, and improve the sensitivity of the loudspeaker module having the voice coil. TECHNICAL SOLUTION

[0005] The technical solution of the present application is as follows:

[0006] In a first aspect, the present application provides a voice coil, which comprises N layers of winding layers wound around a first axis from the inside to the outside, N being an integer greater than 1, adjacent winding layers being connected by a winding switching part, the winding switching parts being dispersedly arranged along the winding path of the voice coil and each winding switching part being non-overlapping with the projection of the winding switching part on a plane perpendicular to the first axis.

[0007] Optionally, the winding switching parts are dispersedly arranged on the same plane perpendicular to the first axis.

[0008] Optionally, the voice coil is in the shape of a square ring as a whole, the voice coil comprises opposite long sides and short sides connected between the long sides, and the winding switching parts are located on the long sides of the voice coil.

[0009] Optionally, the winding layers are connected to form a voice coil body from the inside to the outside, and the voice coil further comprises a voice coil input end and a voice coil output end connected to two end portions of the voice coil body, respectively.

[0010] Optionally, the voice coil is wound by enameled wire, and a conductive core of the enameled wire is made of copper wire core, aluminum wire core, copper-aluminum alloy wire core or copper-clad aluminum wire.

[0011] Optionally, the diameter of the conductive core is 0.02-0.15 mm, and the thickness of the insulating layer of the enameled wire is less than or equal to 0.02 mm.

[0012] In a second aspect, a loudspeaker module is provided, which comprises a basket, a vibration system and a magnetic circuit system accommodated in the basket, and the vibration system comprises the voice coil as described above.

[0013] Optionally, the magnetic circuit system comprises upper and lower clamping plates oppositely and spacedly arranged, an inner magnetic steel arranged on the lower clamping plate, a pole core and an outer magnetic steel, and an edge magnetic steel arranged along the circumference of the inner magnetic steel; the inner magnetic steel and the edge magnetic steel have a magnetic gap therebetween, the voice coil is arranged in the magnetic gap, and the inner magnetic steel, the pole core and the outer magnetic steel are sequentially arranged on the lower clamping plate from bottom to top.

[0014] Optionally, the vibration system further comprises an inner diaphragm arranged above the outer magnetic steel, a skeleton arranged at the outer periphery of the inner diaphragm, an upper diaphragm arranged along the outer periphery of the skeleton, a flexible circuit board arranged below the upper diaphragm, and a lower diaphragm arranged below the flexible circuit board; the flexible circuit board is in conduction with the voice coil, and the skeleton is connected to the flexible circuit board to support the vibration system on the flexible circuit board. Advantages

[0015] The voice coil has the advantages that: the voice coil adjusts the arrangement position of the winding switching part formed between adjacent winding layers, so that the winding switching parts are arranged staggeredly and the projections of the winding switching parts on the plane perpendicular to the first axis do not overlap with each other along the first axis, the dispersed arrangement of the winding switching parts avoids the concentrated arrangement in the thickness direction of the voice coil, reduces the wall thickness of the whole voice coil, reduces the magnetic gap, and improves the conversion efficiency and sensitivity of the loudspeaker assembly when applied to the loudspeaker assembly. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a schematic diagram of the distribution of the winding switching part of the voice coil in the prior art.

[0017] Fig. 2 is a schematic diagram of the cross section of the winding switching part along A-A shown in Fig. 1.

[0018] Fig. 3 is a schematic diagram of the distribution of the winding switching part of the voice coil of the present application.

[0019] Fig. 4 is a schematic diagram of the structure of the voice coil of the present application.

[0020] Fig. 5 is a schematic diagram of the structure of the loudspeaker module of the present application.

[0021] Fig. 6 is an exploded schematic view of a loudspeaker module of the present application. Embodiments of the present application

[0022] The present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Embodiments: In a first aspect, referring to Figs. 3 and 4, the present embodiments provide a voice coil, the voice coil 21 comprising N layers of wire winding layers 210 formed by winding around a first axis (z direction) from inside to outside, N being an integer greater than 1, adjacent wire winding layers 210 being connected by wire switching parts 211, the wire switching parts 211 being dispersedly arranged along the wire winding path of the voice coil 21, and the projection of each wire switching part 211 along the first axis (z direction) on a plane perpendicular to the first axis (xy plane) being mutually non-overlapping.

[0024] The voice coil 21 described in the present application adjusts the arrangement position of the wire switching parts 211 formed between adjacent wire winding layers 210, so that the wire switching parts 211 are arranged in staggered positions and the projection of each wire switching part 211 along the z direction on the xy plane is mutually non-overlapping, the dispersed arrangement of the positions of the wire switching parts 211 avoids the concentrated arrangement in the thickness direction of the voice coil 21, reduces the wall thickness of the whole voice coil 21, reduces the magnetic gap, and improves the conversion efficiency and sensitivity of the loudspeaker assembly when applied to the loudspeaker assembly.

[0025] It should be noted that the direction in refers to the direction close to the central axis of the voice coil 21, and the direction out refers to the direction away from the center of the voice coil 21; the x, y, and z directions are perpendicular to each other in space, and the z direction is parallel to the vibration direction. Optionally, when the number of wire winding layers 210 of the voice coil 21 is N layers, the number of wire switching parts 211 arranged is N-1, wherein N is an integer greater than 1; for example, in some embodiments, when the number of wire winding layers 210 arranged in the voice coil 21 is 5 layers, the number of wire switching parts 211 arranged is 4; optionally, the wire switching parts 211 are distributed on the long sides 212 of the voice coil 21.

[0026] Optionally, the wire switching parts 211 are dispersedly arranged in the same xy plane.

[0027] Optionally, referring to Fig. 3, the voice coil 21 as a whole is in the shape of a square ring, the voice coil 21 comprising oppositely arranged long sides 212 and short sides 213 connected between the long sides 212, the wire switching parts 211 being located on the long sides 212 of the voice coil 21. In some embodiments, the long sides 212 are arranged in parallel with the x direction, and the short sides 213 are arranged in parallel with the y direction.

[0028] Optionally, as shown in FIG. 4, the winding layer 210 is connected from inside to outside to form a voice coil body 214, and the voice coil 21 further comprises a voice coil input end 215 and a voice coil output end 216 connected to two ends of the voice coil body 214 respectively.

[0029] Optionally, the voice coil 21 is wound by an enameled wire, and a conductive wire core of the enameled wire adopts a copper wire core, an aluminum wire core, a copper-aluminum alloy wire core or a copper-clad aluminum wire.

[0030] Optionally, a wire diameter of the conductive wire core is 0.02-0.15 mm, and a thickness of an insulating layer of the enameled wire is less than or equal to 0.02 mm.

[0031] In a second aspect, the embodiments of the present application provide a loudspeaker module, as shown in FIG. 5 and FIG. 6, which comprises a basket 1, a vibration system 2 and a magnetic circuit system 3 accommodated in the basket 1, and the vibration system 2 comprises the voice coil 21 as described above.

[0032] Optionally, the magnetic circuit system 3 comprises an upper clamping plate 31 and a lower clamping plate 32 oppositely and spacedly arranged, an inner magnetic steel 33, a pole core 34 and an outer magnetic steel 35 arranged on the lower clamping plate 32, and a side magnetic steel 36 spacedly arranged on an outer periphery of the inner magnetic steel 33; a magnetic gap is formed between the inner magnetic steel 33 and the side magnetic steel 36, the voice coil 21 is arranged in the magnetic gap, and the inner magnetic steel 33, the pole core 34 and the outer magnetic steel 35 are sequentially arranged on the lower clamping plate 32 from bottom to top.

[0033] Optionally, the vibration system 2 further comprises an inner diaphragm 22 arranged above the outer magnetic steel 35, a skeleton 23 arranged on an outer periphery of the inner diaphragm 22, an upper diaphragm 24 arranged along an outer periphery of the skeleton 23, a flexible circuit board 25 arranged below the upper diaphragm 24, and a lower diaphragm 26 arranged below the flexible circuit board 25, the flexible circuit board 25 is in conduction with the voice coil 21, and the skeleton 23 is connected to the flexible circuit board 25 to support the vibration system 2 on the flexible circuit board 25.

[0034] The voice coil 21 is connected with the skeleton 23 through the voice coil input end 215 and the voice coil output end 216 and is in conduction with the flexible circuit board 25 through the skeleton. It should be noted that the direction above refers to a direction away from the lower clamping plate 32 along the z direction, and the direction below refers to a direction close to the lower clamping plate 32 along the z direction.

[0035] The above only describes the embodiments of the present application, and it should be noted that those skilled in the art can make improvements without departing from the creative concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A voice coil, characterized in that: The voice coil includes N winding layers formed by winding around a first axis from the inside out, where N is an integer greater than 1. Adjacent winding layers are connected by winding switching parts. The winding switching parts are distributed along the winding path of the voice coil, and the projections of each winding switching part along the first axis on a plane perpendicular to the first axis do not overlap.

2. The voice coil according to claim 1, characterized in that: The winding switching sections are distributed in the same plane perpendicular to the first axis.

3. The voice coil according to claim 1, characterized in that: The voice coil is generally square-shaped, and includes a long side that is arranged opposite each other and a short side that connects the long sides. The winding switching part is located on the long side of the voice coil.

4. The voice coil according to claim 1, characterized in that: The winding layers are connected from the inside to the outside to form a voice coil body. The voice coil also includes a voice coil input terminal and a voice coil output terminal, which are respectively connected to the two ends of the voice coil body.

5. The voice coil according to claim 1, characterized in that: The voice coil is made of enameled wire, and the conductive core of the enameled wire is made of copper, aluminum, copper-aluminum alloy or copper-clad aluminum.

6. The voice coil according to claim 5, characterized in that: The conductor core has a diameter of 0.02-0.15 mm, and the insulation layer of the enameled wire has a thickness of less than or equal to 0.02 mm.

7. A speaker module, characterized in that: It includes a basket frame and a vibration system and a magnetic circuit system housed within the basket frame, the vibration system including a voice coil as described in any one of claims 1-6.

8. The speaker module according to claim 7, characterized in that: The magnetic circuit system includes an upper clamping plate and a lower clamping plate that are arranged opposite to each other and spaced apart, an inner magnet, a pole core and an outer magnet disposed on the lower clamping plate, and a side magnet disposed along the circumference of the inner magnet; there is a magnetic gap between the inner magnet and the side magnet, the voice coil is disposed in the magnetic gap, and the inner magnet, the pole core and the outer magnet are disposed on the lower clamping plate from bottom to top.

9. The speaker module according to claim 8, characterized in that: The vibration system further includes an inner diaphragm disposed above the outer magnet, a frame disposed around the outer periphery of the inner diaphragm, an upper diaphragm disposed along the outer periphery of the frame, a flexible circuit board disposed below the upper diaphragm, and a lower diaphragm disposed below the flexible circuit board. The flexible circuit board is connected to the voice coil, and the frame is connected to the flexible circuit board to support the vibration system on the flexible circuit board.

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