CN111741416B - Sound production device, voice coil thereof and winding method of voice coil - Google Patents

Sound production device, voice coil thereof and winding method of voice coil Download PDF

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Publication number
CN111741416B
CN111741416B CN202010663936.8A CN202010663936A CN111741416B CN 111741416 B CN111741416 B CN 111741416B CN 202010663936 A CN202010663936 A CN 202010663936A CN 111741416 B CN111741416 B CN 111741416B
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voice coil
wire
winding
inner layer
mandrel
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CN111741416A (en
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顾月美
陈俊
廖焕彬
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AAC Technologies Pte Ltd
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AAC Technologies Pte Ltd
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Priority to CN202010663936.8A priority Critical patent/CN111741416B/en
Priority to PCT/CN2020/103898 priority patent/WO2022007005A1/en
Publication of CN111741416A publication Critical patent/CN111741416A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
    • H04R2231/001—Moulding aspects of diaphragm or surround

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

The invention provides a sound production device, a voice coil thereof and a winding method of the voice coil. The voice coil loudspeaker voice coil has the through-hole, the voice coil loudspeaker voice coil include first voice coil loudspeaker voice coil and with first voice coil loudspeaker voice coil fixed connection's second voice coil loudspeaker voice coil, the second voice coil loudspeaker voice coil includes to be connected with first voice coil loudspeaker voice coil and encloses the inlayer that closes formation through-hole and the skin of shaping in inlayer one side of keeping away from the through-hole with first voice coil loudspeaker voice coil, the skin has the convex part in the inlayer along the axis direction protrusion of through-hole, the surface cladding that through-hole one side was kept away from to first voice coil loudspeaker voice coil has the convex part, and the convex part is connected with first voice coil loudspeaker voice coil, wherein, outer individual layer number of turns equals the individual layer number of turns sum of inlayer and first voice coil loudspeaker voice coil. Compared with the prior art, the sound production device, the voice coil and the winding method of the voice coil reduce the influence of the first voice coil on the second voice coil, so that the aim of regulating the voice coils is fulfilled to improve the performance of the voice coils.

Description

Sound production device, voice coil thereof and winding method of voice coil
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of acoustoelectrics, in particular to a sound production device, a voice coil thereof and a winding method of the voice coil.
[ background of the invention ]
With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. A sound generating device for playing sound is widely applied to smart mobile devices such as current mobile phones. Among them, a sound generating device having a dual-layer voice coil structure is widely used in mobile devices due to its excellent acoustic performance.
The sound production device of correlation technique includes the basin frame and is fixed in the vibration system of basin frame and the magnetic circuit that has the magnetic gap respectively, and vibration system is including the vibrating diaphragm that is fixed in the basin frame and be fixed in the vibrating diaphragm and insert and locate the voice coil loudspeaker voice coil of magnetic gap vibration sound production with the drive vibrating diaphragm, and the voice coil loudspeaker voice coil is including folding first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil of establishing fixedly. However, when the voice coil of the related art is wound, usually, after the first voice coil is wound, the second voice coil is directly wound above the first voice coil, and due to the uneven upper surface of the first voice coil, negative effects are generated on the winding of the second voice coil, so that the structure of the second voice coil is irregular, and the performance is seriously affected.
Therefore, there is a need to provide a new voice coil to solve the above-mentioned technical problems.
[ summary of the invention ]
The invention aims to provide a sound production device, a voice coil thereof and a winding method of the voice coil, wherein the voice coil can improve the regularity of the voice coil.
In order to achieve the above object, the present invention provides a voice coil having a through hole, wherein the voice coil includes a first voice coil and a second voice coil fixedly connected to the first voice coil, the second voice coil includes an inner layer connected to the first voice coil and enclosing with the first voice coil to form the through hole, and an outer layer formed on one side of the inner layer away from the through hole, the outer layer has a protrusion protruding from the inner layer along an axial direction of the through hole, the surface of the first voice coil away from the through hole is coated with the protrusion, and the protrusion is connected to the first voice coil, wherein a number of turns of the outer layer is equal to a sum of numbers of turns of the inner layer and the first voice coil.
Preferably, the number of layers of the first voice coil is an even number, the first voice coil has a first incoming line and a first outgoing line, the first incoming line extends from one side of the first voice coil, which is far away from the outer layer, and is located at one end of the first voice coil, which is far away from the inner layer, and the first outgoing line extends from one side of the first voice coil, which is close to the outer layer, and is located at one end of the first voice coil, which is far away from the inner layer; the second voice coil is provided with a second incoming wire and a second outgoing wire, and the second incoming wire extends out from one side, far away from the outer layer, of the inner layer and is located at one end, far away from the first voice coil, of the inner layer.
Preferably, the number of layers of the second voice coil is an even number, and the second outgoing line extends from one side of the outer layer, which is far away from the inner layer, and is located at one end of the outer layer, which is far away from the first voice coil.
The invention also provides a winding method of the voice coil, the voice coil is manufactured by winding the enameled wire through a winding tool, the winding tool comprises a mandrel, and the winding method of the voice coil comprises the following steps:
winding a first voice coil: winding the enameled wire on the mandrel to form a first voice coil;
winding a second voice coil: sequentially winding the other enameled wire on the mandrel to form an inner layer abutted against the first voice coil and an outer layer on the inner layer and the first voice coil, wherein the outer layer is provided with a convex part protruding out of the inner layer along the axial direction of the mandrel, and the convex part is coated on the surface of one side, away from the mandrel, of the first voice coil;
bonding: bonding and fixing the inner layer and the convex part to the first voice coil under a preset environment so as to bond the first voice coil and the second voice coil to obtain the voice coil;
wherein the number of turns of the outer layer is equal to the sum of the number of turns of the inner layer and the first voice coil.
Preferably, the number of winding layers of the first voice coil is even, the first voice coil is provided with a first incoming wire and a first outgoing wire, and during winding, the first incoming wire is wound to extend out from one side of the first voice coil, which is far away from the outer layer, and is positioned at one end of the first voice coil, which is far away from the inner layer, and the first outgoing wire is wound to extend out from one side of the first voice coil, which is close to the outer layer, and is positioned at one end of the first voice coil, which is far away from the inner layer; the second voice coil is provided with a second incoming wire and a second outgoing wire, and the second incoming wire is wound to extend out from one side of the inner layer far away from the outer layer and is positioned at one end of the inner layer far away from the first voice coil during winding.
Preferably, the number of winding layers of the second voice coil is an even number, and during winding, the second outgoing line is wound to extend out from one side of the outer layer far away from the inner layer and located at one end of the outer layer far away from the first voice coil.
Preferably, the winding tool further comprises an operating panel, a wire feeding device, a first wire inlet clamp, a first wire outlet clamp, a second wire inlet clamp and a second wire outlet clamp, wherein the operating panel is sleeved and fixed on the mandrel, the wire feeding device is arranged at an interval with the mandrel and can move along the axial direction of the mandrel relative to the mandrel, and the first wire inlet clamp, the first wire outlet clamp, the second wire inlet clamp and the second wire outlet clamp are fixed on the operating panel and arranged at an interval with the mandrel; when the first voice coil is wound, the first incoming wire is clamped to the first incoming wire clamp, the winding direction of the enameled wire is controlled through the wire feeding device, so that the enameled wire is wound to form the first voice coil, and after the first voice coil is formed through winding, the first outgoing wire is clamped to the first outgoing wire clamp; and when the second voice coil is wound, the second incoming line is clamped in the second incoming line clamp, the winding direction of the enameled wire is controlled through the line feeding device, so that the enameled wire is wound to form the second voice coil, and after the second voice coil is wound to form the second voice coil, the second outgoing line is clamped in the second outgoing line clamp.
Preferably, the enameled wire is a hot-melt enameled wire; the first voice coil and the second voice coil are wound at the ambient temperature of 150-250 ℃.
Preferably, the winding tool further comprises a first wire guiding member and a second wire guiding member, wherein the first wire guiding member and the second wire guiding member are sleeved and fixed on the mandrel, and the second wire guiding member can move along the mandrel.
Preferably, the step of winding the first voice coil comprises the sub-steps of:
moving the second wire guide along the mandrel to a first preset position spaced from the first wire guide;
winding the first voice coil on the mandrel by taking the first wire guide piece and the second wire guide piece as references, so that the first voice coil formed by winding is clamped between the first wire guide piece and the second wire guide piece;
the step of winding the second voice coil comprises the following substeps:
moving the second wire guide along the mandrel to a second preset position spaced from the first wire guide;
the inner layer is wound on the mandrel by taking the first voice coil and the second lead piece as references, so that the wound inner layer is clamped between the second lead piece and the first voice coil;
the outer layer is wound on the first voice coil and the inner layer by taking the first wire guide piece and the second wire guide piece as references, so that the wound outer layer is clamped between the first wire guide piece and the second wire guide piece;
wherein the second predetermined position is further away from the first wire guide relative to the first predetermined position.
Preferably, a wire groove is formed in an end surface of the first wire guide facing the second wire guide, and when the first voice coil and the second voice coil are wound, the wire groove applies tension to the enameled wire located in the wire groove so that a wire section of the enameled wire located between the wire groove and the mandrel is tensioned.
Preferably, the enameled wire is a hot-melt enameled wire; the first voice coil and the second voice coil are extruded and bonded under a preset temperature environment, and the preset temperature is 150-250 ℃.
Preferably, the enameled wire is an alcohol-melting enameled wire; and the first voice coil and the second voice coil are extruded and bonded in an alcohol solvent environment.
The invention also provides a sound production device, which comprises a vibration system and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the magnetic circuit system is provided with a magnetic gap, the vibration system comprises a vibrating diaphragm and a voice coil which is inserted into the magnetic gap and drives the vibrating diaphragm to vibrate and produce sound, the voice coil is any one of the voice coils, and the axial direction of the through hole of the voice coil is the vibration direction of the vibrating diaphragm.
Compared with the prior art, the sound production device, the voice coil and the voice coil winding method thereof have the advantages that the number of layers of the first voice coil is set to be less than that of the second voice coil, and the inner layer and the convex part of the second voice coil are respectively connected with the first voice coil, so that the influence of the first voice coil on the winding of the second voice coil can be reduced, and the regularity of the second voice coil can be improved to improve the performance of the second voice coil; simultaneously, the skin cladding the inlayer with first voice coil loudspeaker voice coil can also be right the inlayer with first voice coil loudspeaker voice coil plays the constraint effect to improve the regularity of voice coil loudspeaker voice coil. In addition, the number of turns/layer ratio of the first voice coil and the second voice coil can be freely adjusted according to the performance requirement of the loudspeaker.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic structural diagram of a sound device according to the present invention;
FIG. 2 is a schematic view of a voice coil of the sound device shown in FIG. 1;
FIG. 3 is a schematic view of a second voice coil of the voice coils shown in FIG. 2;
FIG. 4 is a schematic structural diagram of a winding tool of the present invention;
FIG. 5 is a schematic structural view of a first wire guiding member in the winding tool shown in FIG. 4;
FIG. 6 is a schematic structural diagram of a part of a voice coil wound by the winding tool according to the present invention;
FIG. 7 is a schematic view of a portion a of the partial structure shown in FIG. 6;
FIG. 8 is a flow chart of a method of winding a voice coil;
fig. 9 is a flowchart of step S1 in the winding method of the voice coil;
fig. 10 is a flowchart of step S2 in the method for winding a voice coil.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the sound production device 100 includes a frame 1, a vibration system 2 held in the frame 1, and a magnetic circuit system 3 for driving the vibration system 2 to vibrate and produce sound.
The magnetic circuit system 3 comprises a magnetic yoke 31 fixed on the basin stand 1, a main magnetic steel 33 and an auxiliary magnetic steel 35 fixedly arranged on the magnetic yoke 31, a main pole core 37 covering one side of the main magnetic steel 33 far away from the magnetic yoke 31, and an auxiliary pole core 39 covering one side of the auxiliary magnetic steel 35 far away from the magnetic yoke 31, wherein the main magnetic steel 33 and the auxiliary magnetic steel 35 form a magnetic gap 3A at intervals.
The vibration system 2 comprises a diaphragm 21 fixed on the basin stand 1 and a voice coil 23 fixed on the diaphragm 21 and inserted into the magnetic gap 3A to drive the diaphragm 21 to vibrate and sound.
Referring to fig. 2 and 3, the voice coil 23 has a through hole 23A, wherein an axial direction of the through hole 23A is a vibration direction of the diaphragm 21.
The voice coil 23 includes a first voice coil 25 and a second voice coil 27 fixedly connected to the first voice coil 25.
The second voice coil 27 includes the inner layer 271 that is connected with the first voice coil 25 and with the first voice coil 25 encloses to close and forms the through-hole 23A and the shaping in the inner layer 271 is kept away from the outer 273 of through-hole 23A one side, the outer 273 has along the axis direction protrusion in the inner layer 271 of through-hole 23A, the surface cladding that the first voice coil 25 was kept away from through-hole 23A one side has the convex 277, the convex 277 with the first voice coil 25 is connected, wherein, the single-deck number of turns of outer 273 equals the sum of the single-deck number of turns of inner layer 271 and first voice coil 25. That is, the height of the outer layer 273 is equal to the sum of the height of the inner layer 271 and the height of the first voice coil 25 in the axial direction of the through-hole 23A. The number of layers of the first voice coil 25 is set to be less than that of the second voice coil 27, and the inner layer 271 and the convex portion 277 of the second voice coil 27 are respectively connected with the first voice coil 25, so that the influence of the first voice coil 25 on the winding of the second voice coil 27 can be reduced, and the regularity of the second voice coil 27 can be improved to improve the performance of the second voice coil 27; meanwhile, the outer layer 273 covers the inner layer 271 and the first voice coil 27, and may also play a role in binding the inner layer 271 and the first voice coil 27, thereby improving the regularity of the voice coil 23. In addition, the number of turns/layer ratio of the first voice coil 25 and the second voice coil 27 can be freely adjusted according to the performance requirement of the loudspeaker.
In this embodiment, the number of layers of the first voice coil 25 is an even number, the first voice coil 25 has a first incoming line 251 and a first outgoing line 253, the first incoming line 251 extends from one side of the first voice coil 25, which is far away from the outer layer 273, and is located at one end of the first voice coil 25, which is far away from the inner layer 271, and the first outgoing line 253 extends from one side of the first voice coil 25, which is close to the outer layer 273, and is located at one end of the first voice coil 25, which is far away from the inner layer 271.
In this embodiment, the second voice coil 27 has a second incoming wire 278 and a second outgoing wire 279, and the second incoming wire 278 extends from one side of the inner layer 271 away from the outer layer 273 and is located at one end of the inner layer 271 away from the first voice coil 25. Correspondingly, when the number of the second voice coil 27 is even, the second outgoing line 279 extends from the side of the outer layer 273 away from the inner layer 271 and is located at the end of the outer layer 273 away from the first voice coil 25; when the number of the second voice coil 27 is odd, the second outgoing line 279 extends from the outer layer 273 on the side away from the inner layer 271 and is located at the end of the outer layer 273 close to the first voice coil 25. That is, when the second incoming wire 278 extends from the side of the inner layer 271 away from the outer layer 273 and is located at the end of the inner layer 271 away from the first voice coil 25, the position of the second outgoing wire 279 on the outer layer 273 depends on the number of layers of the second voice coil 27.
The arrangement of the first wire inlet 251, the first wire outlet 253, the second wire inlet 278 and the second wire outlet 279 can avoid the problem of irregular voice coil structure caused by the fact that the wire inlet and the wire outlet of the first voice coil 25 and the second voice coil 27 are wound by the winding tool 200 to be positioned between the joint surfaces of the first voice coil 25 and the second voice coil 27.
As shown in fig. 2, the second outgoing line 279 extends from the outer layer 273 at a side away from the inner layer 271 and is located at an end of the outer layer 273 away from the first voice coil 25. That is, the number of layers of the second voice coil 27 is even.
The invention also provides a winding method of the voice coil, and the winding method of the voice coil winds the enameled wire into the voice coil 23 through the winding tool.
Referring to fig. 4, the winding tool 200 includes a mandrel 4.
Referring to fig. 8, the winding method of the voice coil includes the following steps:
step S1, winding the first voice coil 25: and winding the enameled wire on the mandrel 4 to form a first voice coil 25.
Step S2, winding the second voice coil 27: and sequentially winding the other enameled wire on the mandrel 4 to form an inner layer 271 abutted to the first voice coil 25 and an outer layer 273 on the inner layer 271 and the first voice coil 25, wherein the outer layer 273 has a convex part 277 protruding from the inner layer 271 along the axial direction of the mandrel 4, and the convex part 277 is coated on the surface of the first voice coil 25 on the side far away from the mandrel 4.
Bonding: the inner layer 271 and the convex portion 277 are adhesively fixed to the first voice coil 25 under a predetermined environment so that the first voice coil 25 and the second voice coil 27 are bonded to obtain the voice coil 23.
Wherein the number of turns of the outer layer 273 is equal to the sum of the number of turns of the inner layer 271 and the first voice coil 25.
In this embodiment, the enamel wire is a hot-melt enamel wire; the first voice coil 25 and the second voice coil 27 are extrusion bonded in a preset temperature environment, wherein the preset temperature is 150 ℃ to 250 ℃, and preferably 200 ℃ to 230 ℃. It is understood that, in other embodiments, the enamel wire may also be an alchol-melt wire; in this case, the first voice coil 25 and the second voice coil 27 may be extrusion bonded in an alcohol solvent environment.
In this embodiment, the number of winding layers of the first voice coil 25 is an even number, the first voice coil 25 has a first incoming wire 251 and a first outgoing wire 253, and during winding, the first incoming wire 251 is wound to be wound from one side of the first voice coil 25, which is far away from the outer layer 273, is extended out and is located at one end of the first voice coil 25, which is far away from the inner layer 271, and the first outgoing wire 253 is wound to be wound from one side of the first voice coil 25, which is close to the outer layer 273, is extended out and is located at one end of the first voice coil 25, which is far away from the inner layer 271.
In this embodiment, the second voice coil 27 has a second incoming wire 278 and a second outgoing wire 279, and during winding, the second incoming wire 278 is wound to extend from one side of the inner layer 271 away from the outer layer 273 and is located at one end of the inner layer 271 away from the first voice coil 25. When the number of the second voice coil 27 is even, the second outgoing line 279 is correspondingly wound to extend from the side of the outer layer 273 far away from the inner layer 271 and is located at the end of the outer layer 273 far away from the first voice coil 25; when the number of the layers of the second voice coil 27 is odd, the second outgoing line 279 is correspondingly wound to extend from the side of the outer layer 273 away from the inner layer 271 and located at the end of the outer layer 273 close to the first voice coil 25.
In this embodiment, when the number of winding layers of the second voice coil 27 is even, the second outgoing line 279 is wound to extend from the side of the outer layer 273 away from the inner layer 271 and is located at the end of the outer layer 273 away from the first voice coil 25.
Referring to fig. 4, in the present embodiment, the winding tool 200 further includes a first wire guiding member 5 and a second wire guiding member 6 sleeved and fixed on the mandrel 4, and the second wire guiding member 6 can move along the mandrel 4.
Referring to fig. 9, step S1 includes the following sub-steps:
step S11, moving the second wire guide 6 along the mandrel 4 to a first predetermined position spaced from the first wire guide 5.
Step S12, winding the first voice coil 25 on the mandrel 4 with the first wire guide 5 and the second wire guide 6 as references, so that the wound first voice coil 25 is sandwiched between the first wire guide 5 and the second wire guide 6.
Referring to fig. 10, step S2 includes the following sub-steps:
step S21, moving the second wire guide 6 along the mandrel 4 to a second predetermined position spaced from the first wire guide 5. Wherein the second predetermined position is further away from the first wire guide 5 than the first predetermined position.
Step S22 is to wind the inner layer 271 around the mandrel 4 with reference to the first voice coil 25 and the second wire guide 6, so that the wound inner layer 271 is sandwiched between the second wire guide 6 and the first voice coil 25.
Step S23 is to wind the outer layer 273 around the first voice coil 25 and the inner layer 271 with reference to the first wire guide 5 and the second wire guide 6, so that the wound outer layer 273 is sandwiched between the first wire guide 5 and the second wire guide 6.
In this way, by winding the first voice coil 25 on the core shaft 4 with the first wire guide 5 and the second wire guide 6 as references, winding the inner layer 271 on the core shaft 4 with the first voice coil 25 and the second wire guide 6 as references, and winding the outer layer 273 on the first voice coil 25 and the inner layer 271 with the first wire guide 5 and the second wire guide 6 as references, the flatness of the surfaces where the first voice coil 25 and the second voice coil 27 abut against each other (specifically, the flatness of the vertical bonding surface and the parallel bonding surface) can be improved. Meanwhile, in step S3, the press bonding between the first voice coil 25 and the second voice coil 27 may also be achieved by moving the second wire member 6.
Referring to fig. 5, in the present embodiment, a wire groove 51 is formed on an end surface of the first wire guide 5 facing the second wire guide 6, and when the first voice coil 25 and the second voice coil 27 are wound, the wire groove 51 applies tension to the enameled wire located therein so as to tension a wire segment of the enameled wire located between the wire groove 51 and the mandrel 4.
Referring to fig. 4, 6 and 7, in this embodiment, the winding tool 200 further includes an operation panel 7 sleeved and fixed on the core shaft 4, a wire feeding device (not shown) spaced apart from the core shaft 4 and capable of moving axially relative to the core shaft 4, and a first wire feeding clamp 8, a first wire outgoing clamp 9, a second wire feeding clamp 10 and a second wire outgoing clamp 20 fixed on the operation panel 7 and spaced apart from the core shaft 4; when the first voice coil 25 is wound, the first incoming line 251 is clamped in the first incoming clamp 8, the winding direction of the enameled wire is controlled through the wire feeding device, so that the enameled wire is wound to form the first voice coil 25, and after the first voice coil 25 is wound to form the first voice coil, the first outgoing line 253 is clamped in the first outgoing clamp 9; when the second voice coil 27 is wound, the second incoming line 278 is clamped in the second incoming line clamp 10, the winding direction of the enameled wire is controlled through the line feeding device, so that the enameled wire is wound to form the second voice coil 27, and after the second voice coil 27 is formed through winding, the second outgoing line 279 is clamped in the second outgoing line clamp 20.
Specifically, when the first voice coil 25 is wound, the first incoming wire 251 is clamped by the first incoming wire clamp 8 and extends to the mandrel 4 through the wire guide groove 51, since the wire guide groove 51 applies tension to the first incoming wire 251 located therein, so that the whole first incoming wire 251 is tensioned, and when the first voice coil 25 is wound, the first incoming wire 251 is removed from the wire guide groove 51; similarly, when the second voice coil 27 is wound, the second wire inlet 278 is clamped in the second wire inlet clamp 10 and passes through the wire guide groove 51 to extend to the mandrel 4, and since the wire guide groove 51 applies tension to the second wire inlet 278 located therein, the whole second wire inlet 278 is tensioned, and when the second voice coil 27 is wound, the second wire inlet 278 is moved out of the wire guide groove 51. Through the setting of wire casing 51 not only the coiling first voice coil 25 with second voice coil 27 can make first inlet wire 251 with second inlet wire 278 tensioning, moreover because wire casing 51 is located the below of dabber 4 wire winding position (be in the coiling first voice coil 25 with the in-process of second voice coil 27, first inlet wire 251 with second inlet wire 278 is not in coiling route scope), thereby can avoid first inlet wire 251 with the influence of second inlet wire 278 to the coiling, thereby be favorable to improving the coiling and form the regularity of voice coil 23.
When the enameled wire is a hot-melt enameled wire, preferably, the first voice coil 25 and the second voice coil 27 are both wound at an ambient temperature of 150 ℃ to 250 ℃, and more preferably at an ambient temperature of 200 ℃ to 230 ℃. Therefore, in the winding process, the enameled wire is heated to be melted (the enameled wire is heated to be melted at the ambient temperature of 200-230 ℃) so that the adjacent coils are fixed, so that the first voice coil 25 and the second voice coil 27 are shaped in the winding process, the first voice coil 25 and the second voice coil 27 are relatively flat along the direction perpendicular to the mandrel, and the regularity of the voice coil 23 formed by winding is improved.
As shown in fig. 4, the second wire guide 6 is further away from the operating panel 7 than the first wire guide 5. It will be appreciated that it is also possible to arrange the second wire guide 6 closer to the operating panel 7 than the first wire guide 5.
Compared with the related art, the sound production device and the voice coil and the winding method of the voice coil thereof of the invention set the number of layers of the first voice coil 25 to be less than that of the second voice coil 27 and make the inner layer 271 and the convex part 277 of the second voice coil 27 respectively connected with the first voice coil 25, thereby reducing the influence of the first voice coil 25 on the winding of the second voice coil 27 and further improving the regularity of the second voice coil 27 to improve the performance of the second voice coil 27; meanwhile, the outer layer 273 covers the inner layer 271 and the first voice coil 27, and may also play a role in binding the inner layer 271 and the first voice coil 27, thereby improving the regularity of the voice coil 23. In addition, the number of turns/layer ratio of the first voice coil 25 and the second voice coil 27 can be freely adjusted according to the performance requirement of the loudspeaker.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims (14)

1. The utility model provides a voice coil loudspeaker voice coil, has the through-hole, the voice coil loudspeaker voice coil include first voice coil loudspeaker voice coil and with first voice coil loudspeaker voice coil fixed connection's second voice coil, its characterized in that, the second voice coil loudspeaker voice coil include with first voice coil loudspeaker voice coil connect and with first voice coil loudspeaker voice coil encloses to close the formation the inlayer and the shaping in the inlayer is kept away from the skin of through-hole one side, the skin has the edge the axis direction protrusion of through-hole in the convex part of inlayer, first voice coil loudspeaker voice coil is kept away from the surface cladding of through-hole one side has the convex part, just the convex part with first voice coil loudspeaker voice coil is connected, wherein, outer individual layer number of turns equals the inlayer with the individual layer number of turns sum of first voice coil loudspeaker voice coil.
2. The voice coil of claim 1, wherein the number of layers of the first voice coil is even, the first voice coil has a first incoming line and a first outgoing line, the first incoming line extends from a side of the first voice coil away from the outer layer and is located at an end of the first voice coil away from the inner layer, and the first outgoing line extends from a side of the first voice coil close to the outer layer and is located at an end of the first voice coil away from the inner layer; the second voice coil is provided with a second incoming wire and a second outgoing wire, and the second incoming wire extends out from one side, far away from the outer layer, of the inner layer and is located at one end, far away from the first voice coil, of the inner layer.
3. The voice coil according to claim 2, wherein the number of layers of the second voice coil is even, and the second outgoing line extends from a side of the outer layer away from the inner layer and is located at an end of the outer layer away from the first voice coil.
4. The winding method of the voice coil is characterized by comprising the following steps of:
winding a first voice coil: winding the enameled wire on the mandrel to form a first voice coil;
winding a second voice coil: sequentially winding the other enameled wire on the mandrel to form an inner layer abutted against the first voice coil and an outer layer on the inner layer and the first voice coil, wherein the outer layer is provided with a convex part protruding out of the inner layer along the axial direction of the mandrel, and the convex part is coated on the surface of one side, away from the mandrel, of the first voice coil;
bonding: bonding and fixing the inner layer and the convex part to the first voice coil under a preset environment so as to bond the first voice coil and the second voice coil to obtain the voice coil;
wherein the number of turns of the outer layer is equal to the sum of the number of turns of the inner layer and the first voice coil.
5. The winding method of the voice coil according to claim 4, wherein the number of winding layers of the first voice coil is even, the first voice coil is provided with a first incoming wire and a first outgoing wire, and during winding, the first incoming wire is wound to extend out from one side of the first voice coil, which is far away from the outer layer, and is positioned at one end of the first voice coil, which is far away from the inner layer, and the first outgoing wire is wound to extend out from one side of the first voice coil, which is close to the outer layer, and is positioned at one end of the first voice coil, which is far away from the inner layer; the second voice coil is provided with a second incoming wire and a second outgoing wire, and the second incoming wire is wound to extend out from one side of the inner layer far away from the outer layer and is positioned at one end of the inner layer far away from the first voice coil during winding.
6. The winding method of the voice coil according to claim 5, wherein the number of winding layers of the second voice coil is even, and during winding, the second outgoing wire is wound to extend from one side of the outer layer far away from the inner layer and is positioned at one end of the outer layer far away from the first voice coil.
7. The winding method of the voice coil according to claim 5, wherein the winding tool further comprises an operating panel sleeved and fixed on the mandrel, a wire feeding device arranged at an interval with the mandrel and capable of moving along the axial direction of the mandrel relative to the mandrel, and a first wire inlet clamp, a first wire outlet clamp, a second wire inlet clamp and a second wire outlet clamp which are fixed on the operating panel and arranged at an interval with the mandrel; when the first voice coil is wound, the first incoming wire is clamped to the first incoming wire clamp, the winding direction of the enameled wire is controlled through the wire feeding device, so that the enameled wire is wound to form the first voice coil, and after the first voice coil is formed through winding, the first outgoing wire is clamped to the first outgoing wire clamp; and when the second voice coil is wound, the second incoming line is clamped in the second incoming line clamp, the winding direction of the enameled wire is controlled through the line feeding device, so that the enameled wire is wound to form the second voice coil, and after the second voice coil is wound to form the second voice coil, the second outgoing line is clamped in the second outgoing line clamp.
8. The winding method of a voice coil according to claim 7, wherein the enameled wire is a hot-melt enameled wire; the first voice coil and the second voice coil are wound at the ambient temperature of 150-250 ℃.
9. The winding method of a voice coil according to any one of claims 4 to 8, wherein the winding tool further comprises a first wire guide and a second wire guide sleeved and fixed on the mandrel, and the second wire guide can move along the mandrel.
10. The method for winding a voice coil according to claim 9, wherein the step of winding the first voice coil comprises the substeps of:
moving the second wire guide along the mandrel to a first preset position spaced from the first wire guide;
winding the first voice coil on the mandrel by taking the first wire guide piece and the second wire guide piece as references, so that the first voice coil formed by winding is clamped between the first wire guide piece and the second wire guide piece;
the step of winding the second voice coil comprises the following substeps:
moving the second wire guide along the mandrel to a second preset position spaced from the first wire guide;
the inner layer is wound on the mandrel by taking the first voice coil and the second lead piece as references, so that the wound inner layer is clamped between the second lead piece and the first voice coil;
the outer layer is wound on the first voice coil and the inner layer by taking the first wire guide piece and the second wire guide piece as references, so that the wound outer layer is clamped between the first wire guide piece and the second wire guide piece;
wherein the second predetermined position is further away from the first wire guide relative to the first predetermined position.
11. The winding method of the voice coil according to claim 9, wherein a wire groove is formed in an end surface of the first wire member facing the second wire member, and when the first voice coil and the second voice coil are wound, the wire groove applies tension to the enameled wire positioned therein so as to tension a wire section of the enameled wire positioned between the wire groove and the mandrel.
12. The winding method of the voice coil according to claim 4, wherein the enameled wire is a hot-melt enameled wire; the first voice coil and the second voice coil are extruded and bonded under a preset temperature environment, and the preset temperature is 150-250 ℃.
13. The winding method of a voice coil according to claim 4, wherein the enameled wire is an alcohol-melting enameled wire; and the first voice coil and the second voice coil are extruded and bonded in an alcohol solvent environment.
14. A sound production device, comprising a vibration system and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the magnetic circuit system has a magnetic gap, and the vibration system comprises a diaphragm and a voice coil inserted into the magnetic gap and driving the diaphragm to vibrate and produce sound, wherein the voice coil is the voice coil of any one of claims 1 to 3, and wherein the axial direction of the through hole of the voice coil is the vibration direction of the diaphragm.
CN202010663936.8A 2020-07-10 2020-07-10 Sound production device, voice coil thereof and winding method of voice coil Active CN111741416B (en)

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