Search

CN-121985266-A - Voice coil and winding method

CN121985266ACN 121985266 ACN121985266 ACN 121985266ACN-121985266-A

Abstract

The invention discloses a voice coil and a winding method, comprising a framework and a voice coil winding, wherein the voice coil winding is used as a core component for realizing the electromagnetic conversion function of the voice coil and is tightly wound on the outer peripheral wall of the framework, the framework comprises spiral grooves spirally distributed on the outer peripheral wall of the framework and spiral convex surfaces formed between adjacent spiral grooves, the spiral convex surfaces are used for providing winding support and positioning for the voice coil winding, and the spiral grooves are used for increasing the heat dissipation area of the outer surface of the framework.

Inventors

  • Ben Mingsheng
  • YUAN CHANGJUN
  • DING XIAOMEI

Assignees

  • 东台市鸣音电子有限公司

Dates

Publication Date
20260505
Application Date
20260206

Claims (10)

  1. 1. A voice coil is characterized by comprising a framework (1) and a voice coil winding (2); the voice coil winding (2) is used as a core component for realizing the electromagnetic conversion function of the voice coil and is tightly wound on the peripheral wall of the framework (1); The framework (1) comprises spiral grooves (11) which are spirally distributed on the outer peripheral wall of the framework, and spiral convex surfaces (12) which are formed between adjacent spiral grooves (11), wherein the spiral convex surfaces (12) are used for providing winding support and positioning for the voice coil winding (2), and the spiral grooves (11) are used for increasing the heat dissipation area of the outer surface of the framework (1); The heat-conducting assembly is characterized in that a top flange (3) and a bottom flange (4) are fixedly connected to the top and the bottom of the framework (1) respectively, a heat-conducting assembly (5) is arranged in the framework (1), the heat-conducting assembly (5) is integrated with the top flange (3) and the bottom flange (4) integrally and is used for receiving heat conducted by the voice coil winding (2) through the framework (1) and transmitting the heat to radiating holes formed in the top flange (3) and the bottom flange (4), and the heat-conducting assembly (5) is matched with the spiral groove (11) through heat conduction to jointly form a vertically through radiating channel.
  2. 2. A voice coil according to claim 1, wherein the whole of the frame (1) is in a regular cylindrical shape, the maximum outer diameter of the frame is 8-30mm, the axial length of the frame is 10-50mm, the inside of the frame is in a hollow shape which is penetrated up and down, the pitch of the spiral groove (11) on the peripheral wall of the frame (1) is 1-3mm, the groove width is 0.5-1.5mm, the depth is 0.3-0.8mm, the spiral angle is 5-30 degrees, and the width of the spiral convex surface (12) is larger than the groove width of the spiral groove (11).
  3. 3. A voice coil according to claim 1, wherein the heat conducting component (5) comprises a plurality of heat conducting ribs (51) extending along the axial direction of the inner wall of the frame (1), and annular heat conducting members (52) integrally formed with each of the heat conducting ribs (51) up and down, and the annular heat conducting members (52) are fixed to the corresponding side of the top flange (3) and the bottom flange (4) near the frame (1).
  4. 4. The voice coil as set forth in claim 1, wherein the top flange (3) and the bottom flange (4) are of annular structures, the outer diameters of the two flanges are 2-4mm larger than the maximum outer diameter of the framework (1), the axial length of the flanges is 3-5mm, and 4-6 through heat dissipation holes distributed along the annular array of the axial center point are uniformly distributed on the surfaces of the flanges.
  5. 5. A voice coil according to claim 3, wherein the annular heat conducting member (52) corresponds to each of the heat dissipating holes in the top flange (3) and the bottom flange (4), respectively, and the radial dimension of the annular heat conducting member (52) is adapted to the diameter of the heat dissipating hole.
  6. 6. A voice coil according to claim 1, wherein a V-shaped lead groove (31) extending in a radial direction is formed on one side of the body of the top flange (3), and the notch of the lead groove (31) faces the outside of the flange and the groove bottom faces the inside of the flange.
  7. 7. The voice coil as set forth in claim 6, wherein the lead groove (31) is embedded with a fixing insert (32), the shape of the fixing insert (32) is matched with the groove shape of the lead groove (31), the fixing insert (32) is provided with a wire groove penetrating along the vertical height of the fixing insert at the inner side near the groove bottom, the section of the wire groove is arc-shaped, and the width of the wire groove is matched with the wire diameter of the outgoing wire of the voice coil winding (2).
  8. 8. A method of winding a voice coil as claimed in any one of claims 1 to 7, comprising the steps of: s1, fixing a framework (1) according to assembly requirements, presetting winding parameters based on a spiral groove (11) on the outer peripheral wall of the framework (1), temporarily blocking the spiral groove (11), selecting enameled wires with the diameter of 0.08-0.2mm, and cleaning for later use; S2, embedding the initial end of the enameled wire into a lead groove (31), fixing the lead of the initial end through a fixing insert (32) and a high-temperature-resistant adhesive tape, and determining the forward and reverse winding direction of a winding main shaft of the equipment; s3, forward winding a bottom winding along a spiral convex surface (12) of the framework (1) according to preset parameters, and synchronously coating high-temperature-resistant epoxy insulating glue; s4, spraying high-temperature-resistant epoxy insulating glue on the bottom winding and curing to a semi-cured state; s5, switching to reversely wind the upper layer winding along the spiral convex surface (12), and repeatedly carrying out forward winding and reverse winding until the total layer number of the winding reaches a preset layer number; s6, fixing the tail end of the enameled wire and the outgoing line, and realizing double reinforcement fixation through the fixing insert (32) and the high-temperature-resistant conductive adhesive and the adhesive tape; s7, removing the temporary plugging structure of the spiral groove (11).
  9. 9. The method of winding a voice coil according to claim 8, wherein the specific operation of step S1 further comprises: s1-1, selecting a vertical or transverse arrangement mode of the framework (1) according to assembly requirements, and coaxially fixing the framework (1) to a main shaft of a winding machine through a clamp to ensure that no radial offset exists in the rotation process of the framework (1); S1-2, calculating a matching proportion of a spindle rotation angular speed of a winding machine and an axial feeding speed of a wire conveying mechanism based on a spiral angle of a spiral groove (11) and a screw pitch of 1-3mm, wherein the feeding speed = screw pitch x spindle rotation speed, presetting the linkage parameter in an equipment program, and ensuring that an enamelled wire winding track is matched with a spiral trend of a spiral convex surface (12); S1-3, presetting the total number of windings based on the depth of the spiral groove (11), wherein the total number of windings is less than or equal to the depth of the spiral groove according to the wire diameter of the enameled wire multiplied by the total number of windings, and an insulating adhesive coating space of 0.05-0.1mm is reserved, so that the total thickness of the multilayered wound wire is ensured not to exceed a notch plane; S1-4, temporarily plugging a spiral groove (11) by adopting a high-temperature resistant strippable adhesive tape, namely cutting the adhesive tape into strips with the length matched with the groove along the extending direction of the spiral groove (11), respectively attaching the edges of the two sides of the adhesive tape to the top ends of the groove walls of the two sides of the spiral groove (11), completely covering the groove opening of the adhesive tape in the middle area without contacting with the surface of a spiral convex surface (12), ensuring that the spiral convex surface (12) is kept flat and free from shielding, ensuring that the plugging adhesive tapes of adjacent grooves are not overlapped with each other, controlling the distance between the edge of the adhesive tape and the spiral convex surface (12) to be 0.1-0.2mm, and avoiding the adhesive tape from adhering to the spiral convex surface (12); s1-5, selecting enameled wires with the wire diameter of 0.08-0.2mm, and cleaning the enameled wires by absolute ethyl alcohol to remove surface impurities for later use.
  10. 10. The method of winding a voice coil according to claim 8, wherein the specific operations of steps S2, S3, S6 further include: In the step S2, from the view angle towards the axis of the framework (1), the equipment winding main shaft is clockwise rotated to be forward wound and anticlockwise rotated to be backward wound, one end of an enameled wire is embedded into a lead groove (31) of a V-shaped structure through an equipment lead clamping mechanism, a fixed embedded block (32) matched with the groove shape of the lead groove (31) is inserted for temporary blocking, then a high-temperature-resistant adhesive tape with the width of 2-3mm is coated at the flange position of the corresponding area of the fixed embedded block (32), and the fixed embedded block (32) and the lead of the initial section are primarily fixed; In the step S3, the equipment main shaft rotates at a constant speed, the wire conveying mechanism synchronously feeds according to preset linkage parameters, and simultaneously the tension of the wire of the winding machine is controlled to be 0.5-1.5N, so that the enameled wire is tightly attached to the spiral convex surface (12) and is free from loose bulge; In the step S6, the equipment wrapping power supply is turned off, the high-temperature-resistant adhesive tape wrapped in the step S2 is torn off, the fixing insert (32) is taken out, the head and tail extension ends of the enameled wires are pulled to the lead grooves (31) to ensure that two leads are discharged in parallel in the grooves, the fixing insert (32) is re-embedded into the lead grooves (31), high-temperature-resistant conductive adhesive is coated at the gaps between the fixing insert (32) and the lead grooves (31) and the contact positions between the leads and the groove walls, and then the adhesive tape is wrapped for 2-3 layers along the edge of the top flange (3), so that double reinforcement fixation of the fixing insert (32) and the two leads is realized.

Description

Voice coil and winding method Technical Field The invention mainly relates to the technical field of electroacoustic products, in particular to a voice coil and a winding method. Background Electroacoustic products are electronic devices designed and manufactured based on an electro-acoustic energy conversion principle, and have the core functions of realizing bidirectional or unidirectional conversion of electric signals and acoustic signals so as to meet the requirements of sound pickup, amplification, reduction, transmission or processing and the like, and are commonly provided with electroacoustic transducers (loudspeakers and microphones), audio amplifiers, earphones, sound systems, sonar devices, hearing aids and the like. In the core transduction component of electroacoustic products, a voice coil is a core executive component for realizing electric-force conversion and is also a key structure for determining transduction efficiency and tone quality performance, the voice coil is usually wound on a framework by an enameled wire to form a winding, and is suspended in a stable magnetic field constructed by a permanent magnet, when an audio electric signal is fed into the winding of the voice coil, the voice coil can generate mechanical vibration consistent with the frequency of the electric signal in the magnetic field according to ampere force law, and the vibration is transmitted to a vibrating diaphragm connected with the voice coil through the framework to finally push air to form sound waves. In the prior art, the voice coil is generally in a structure form that an enameled wire is wound on the peripheral wall of the framework, but the traditional voice coil framework only carries out passive heat dissipation by means of the outer surface, the winding is tightly wound on the surface of the framework, so that heat on one side of the winding, which is close to the framework, is difficult to penetrate through a framework matrix to be emitted outwards, heat accumulation is easy to form, the working stability of the voice coil is reduced, and the service life is even shortened. Disclosure of Invention The technical scheme of the invention aims at the technical problem that the prior art is too single, and mainly provides a voice coil and a winding method, so that the technical problem that the traditional voice coil framework provided in the background art only relies on the outer surface to perform passive heat dissipation, and the winding is tightly wound on the surface of the framework, so that heat on one side of the winding close to the framework is difficult to penetrate through the framework matrix to be emitted outwards, and heat accumulation is extremely easy to form is solved. The technical scheme adopted for solving the technical problems is as follows: A voice coil includes a bobbin and a voice coil winding. The voice coil winding is used as a core component for realizing the electromagnetic conversion function of the voice coil and is tightly wound on the peripheral wall of the framework. The framework comprises spiral grooves which are spirally distributed on the outer peripheral wall of the framework and spiral convex surfaces which are formed between adjacent spiral grooves, wherein the spiral convex surfaces are used for providing winding support and positioning for the voice coil winding, and the spiral grooves are used for increasing the heat dissipation area of the outer surface of the framework. The top and the bottom of skeleton are fixedly connected with top flange and bottom flange respectively, are provided with heat conduction subassembly in the inside of skeleton, and heat conduction subassembly and top flange and the integrative integration of bottom flange for accept the heat that voice coil winding passes through the skeleton conduction and transmit the louvre of seting up on top flange and the bottom flange, heat conduction subassembly cooperates the spiral slot through the heat conduction effect, forms the heat dissipation passageway that link up from top to bottom jointly. Furthermore, the whole skeleton is regular cylindrical, the maximum outer circle diameter is 8-30mm, the axial length is 10-50mm, the inside of the skeleton is hollow and is vertically penetrated, the pitch of the spiral groove on the peripheral wall of the skeleton is 1-3mm, the groove width is 0.5-1.5mm, the depth is 0.3-0.8mm, and the width of the spiral convex surface is larger than the groove width of the spiral groove. Further, the heat conduction assembly comprises a plurality of heat conduction ribs extending along the axial direction of the inner wall of the framework and annular heat conduction pieces integrated with the heat conduction ribs up and down, and the heat conduction rings are respectively fixed with the corresponding side top flange and the bottom flange close to one side of the framework. Further, the top flange and the bottom flange are of annular structures, the outer diameter