A voice coil winding device and winding method

Abstract

This invention discloses a voice coil winding apparatus and method. The voice coil winding apparatus includes a winding unit and a winding unit. The winding unit includes a frame, a drive mechanism, a detection element, and a controller. The frame is equipped with a rotatable adjustment component with a wire-passing hole adapted to the voice coil wire. The voice coil wire can pass through the wire-passing hole and be wound onto the winding unit along a first direction. The drive mechanism is connected to the frame and drives the frame to reciprocate along a second direction to arrange the voice coil wire along the second direction. The adjustment component and the detection element are respectively connected to the controller. The detection element counts the number of turns of the voice coil. When the count value of the detection element is the same as the correction turn value, the adjustment component rotates according to a preset rotation angle to correct the voice coil wire. This invention can compare the count value of the detection element with the correction turn value, so that the adjustment component can correct the torsion angle of the voice coil when winding the first turn of a new layer of the voice coil.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic product technology, and in particular to a voice coil winding method and a voice coil winding device. Background Technology

[0002] A loudspeaker is an important acoustic component in portable electronic devices, used to convert electrical sound waves into sound signals for transmission; it is an energy conversion device. A loudspeaker typically consists of a vibration system and a magnetic circuit system. The vibration system includes a diaphragm and a voice coil, which are combined together. The voice coil is a crucial component of the loudspeaker. When an alternating audio current passes through the voice coil, it generates a magnetic field that varies with the audio current. This varying magnetic field attracts or repels the magnetic field of the loudspeaker's magnetic circuit system, causing the voice coil to vibrate mechanically, cutting through magnetic lines of force. This vibration, in turn, drives the loudspeaker's diaphragm to vibrate and produce sound.

[0003] Most existing voice coils are made by winding circular voice coil wire. This type of voice coil wire, after winding, leaves large gaps between adjacent wires, preventing the voice coil from fully utilizing the energy of the magnetic field. This results in a low volumetric efficiency, leading to poor speaker sensitivity and poor heat dissipation. Therefore, voice coils with square cross-sections are also used. Square voice coil wire, when wound tightly, eliminates gaps between adjacent wires, improving the volumetric efficiency, sensitivity, and heat dissipation.

[0004] However, square voice coil wire has the following defects when wound into multi-layer voice coils: after the first layer is wound, the voice coil wire will flip or twist when the first turn of each new layer is wound. This causes the voice coil wire to deviate from the preset angle when winding subsequent turns, resulting in wiring errors, affecting the performance of the voice coil, and reducing the quality of the loudspeaker. Summary of the Invention

[0005] The purpose of this invention is to provide a voice coil winding method and a voice coil winding device, which can effectively calibrate and improve the quality of the cabling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] On one hand, a voice coil winding device is provided for winding a multi-layer voice coil. The voice coil winding device includes a winding unit and a aligning unit. The winding unit includes a frame, a drive mechanism, a detection element, and a controller. The frame is provided with a rotatable adjustment component, which has a wire guide hole adapted to the voice coil wire. The voice coil wire can pass through the wire guide hole in a first direction and be wound on the winding unit. The drive mechanism is connected to the frame and drives the frame to reciprocate in a second direction so that the voice coil wire is aligned in the second direction. The first direction is perpendicular to the second direction. The adjustment component and the detection element are respectively connected to the controller. The detection element is used to count the number of turns of the voice coil. The adjustment component rotates according to a preset rotation angle to correct the torsion angle of the voice coil wire.

[0008] As a preferred embodiment of the voice coil winding device, the adjustment assembly includes a wire shaft and a gear set. The gear set includes a meshing driving gear and a driven gear. The driven gear is coaxially arranged with the wire shaft. The wire shaft has a wire-passing hole at its rotation center. The rotation of the gear set can drive the wire shaft and the voice coil wire to rotate synchronously.

[0009] As a preferred embodiment of the voice coil winding device, the frame is further provided with a guide wheel assembly, which is located on the side of the adjustment assembly away from the winding unit, and the guide wheel assembly is provided with a guide groove for the voice coil wire to pass through.

[0010] As a preferred embodiment of the voice coil winding device, both the guide wheel assembly and the adjustment assembly are slidably connected to the frame along the second direction to adjust the tension of the voice coil wire.

[0011] As a preferred embodiment of the voice coil winding device, the frame and the adjustment assembly are connected by a first fastener. One of the frame and the adjustment assembly is provided with a first strip hole, and the other is provided with a first connecting hole. The first fastener passes through the first strip hole and is connected to the first connecting hole.

[0012] The frame and the guide wheel assembly are connected by a second fastener. One of the frame and the guide wheel assembly is provided with a second strip hole, and the other is provided with a second connecting hole. The second fastener passes through the second strip hole and connects with the second connecting hole.

[0013] As a preferred embodiment of the voice coil winding device, the drive mechanism includes a drive body and a piston rod assembly, one end of which is connected to the drive body and the other end of which is connected to the frame.

[0014] On the other hand, a winding method is provided, which uses the voice coil winding device described above to wind a multi-layer voice coil, including the following steps:

[0015] Step S10: Preset the correction coil value and adjust the rotation angle of the component in the controller, wherein the correction coil value is the number of turns of the voice coil before the voice coil wire is wound to the first turn of the new layer;

[0016] Step S20: Pass one end of the voice coil wire through the wire hole of the winding unit along the first direction and connect it to the winding unit to wind the voice coil wire;

[0017] Step S30: Start the voice coil winding device, the winding unit starts winding the voice coil, and the drive mechanism drives the frame to reciprocate along the second direction so that the voice coil wire is laid along the second direction;

[0018] Step S40: The detection element counts the number of turns of the voice coil. When the count value of the detection element is the same as the correction turn value, the controller controls the adjustment component to rotate according to the rotation angle to correct the twist angle of the voice coil wire.

[0019] As a preferred embodiment of the winding method, in step S10, the torsion angle of the voice coil is measured by repeatedly performing the winding test, and the rotation angle is obtained based on the torsion angle.

[0020] Wherein, the torsion angle and the rotation angle are of the same magnitude but opposite in direction.

[0021] As a preferred embodiment of the winding method, the rotation angle includes a first angle and a second angle, the voice coil has a first side and a second side opposite to each other along the second direction, and the number of layers of the voice coil is X;

[0022] When X≥2, when the voice coil wire is laid from the first side along the second side, the rotation angle of the voice coil wire is the first angle. When X≥2, when the voice coil wire is laid from the second side along the first side, the rotation angle of the voice coil wire is the second angle. The first angle and the second angle have the same magnitude but opposite directions.

[0023] As a preferred embodiment of the winding method, the detection element is counted by infrared induction or microwave induction.

[0024] The beneficial effects of this invention are as follows: During the voice coil winding process, the wire guide hole of the adjusting component can straighten the voice coil wire to prevent twisting or flipping during the transport process; moreover, the controller has preset correction turn values ​​and rotation angles. The correction turn value is the number of turns of the voice coil before the first turn of the new layer. The controller can compare the count value of the detector with the correction turn value. When the count value of the detector is the same as the correction turn value, it means that the next turn is the first turn of the new layer. When the first turn of the new layer is wound, the controller can control the adjusting component to rotate according to the preset rotation angle to correct the twist angle of the voice coil wire, thereby ensuring that there will be no wire alignment errors in the subsequent winding of the voice coil wire, and thus improving the performance of the voice coil. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the voice coil structure according to an embodiment of the present invention.

[0027] Figure 2 This is a front view of the voice coil winding device according to an embodiment of the present invention.

[0028] Figure 3 This is a perspective view of the voice coil winding device according to an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the frame structure described in an embodiment of the present invention.

[0030] In the picture:

[0031] 100. Linear driver; 200. Wound driver; 300. Voice coil; 301. First layer; 302. Second layer; 303. Third layer;

[0032] 1. Frame; 2. Drive mechanism; 21. Drive body; 22. Piston rod assembly; 23. Guide rod; 3. Adjustment assembly; 31. Wire shaft; 32. Gear set; 321. Drive component; 322. Drive gear; 323. Driven gear; 33. Wire hole; 4. Wire wheel assembly; 41. Wire groove; 5. First strip hole; 6. Second strip hole. Detailed Implementation

[0033] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Reference Figure 1 The voice coil wire with a square cross-section is wound on a winding die to form a voice coil 300 with a multi-layer structure. Moreover, there is almost no gap between adjacent voice coil wires with a square cross-section, which improves the volume ratio, sensitivity and heat dissipation of the voice coil 300.

[0036] The voice coil winding device provided by this invention is mainly used to wind a voice coil wire with a square cross-section into a multi-layered voice coil 300. In this embodiment, the voice coil 300 has a three-layered structure, with each layer having eight turns.

[0037] like Figures 2 to 4 As shown, the voice coil winding device includes a wire feeding unit (not shown in the figure), a wire guiding unit 100, and a winding unit 200. The wire guiding unit 100 includes a frame 1, a drive mechanism 2, a detection element, and a controller (not shown in the figure). The frame 1 is provided with a rotatable adjustment component 3. The adjustment component 3 is provided with a wire passage hole 33 adapted to the voice coil wire. In this embodiment, the wire passage hole 33 is a square hole. The voice coil wire can pass through the wire passage hole 33 from the wire feeding unit along the first direction to connect with the winding unit 200 and be wound. The wire passage hole 33 can limit and guide the voice coil wire to prevent the voice coil wire from twisting or flipping during the conveying process.

[0038] The drive mechanism 2 is connected to the frame 1. The drive mechanism 2 drives the frame 1 to reciprocate along the second direction, and drives the winding unit 100 to reciprocate along the second direction as well, so that the voice coil wire can be reciprocated along the second direction on the winding unit 200. The first direction is perpendicular to the second direction. The voice coil 300 includes a first side and a second side opposite to each other along the second direction. When winding the first layer 301, the voice coil wire is tightly wound from the first side to the second side. After the first layer 301 is wound, the voice coil wire is tightly wound from the second side to the first side to complete the winding of the second layer 302. After the second layer 302 is wound, the voice coil wire is tightly wound from the first side to the second side again. The multi-layer voice coil 300 is wound in this winding method.

[0039] Based on the above wiring method and production requirements, it can be determined which turn of the total number of turns is the first turn of each layer of the voice coil 300. For example, referring to... Figure 1 When the voice coil 300 has a three-layer structure, with each layer having eight turns, nine turns of the voice coil 300 constitute the first turn of the second layer 302, and seventeen turns of the voice coil 300 constitute the first turn of the third layer 303.

[0040] The adjustment component 3 and the detection element are respectively connected to the controller. The detection element is used to count the number of turns of the voice coil 300. By counting with the detection element, it can be determined whether the number of turns of the voice coil 300 is the last turn of the winding layer, and thus determine whether the next turn is the first turn of the new layer of the voice coil 300. If it is the first turn of the new layer of the voice coil 300, the adjustment component can drive the voice coil wire to rotate according to the preset rotation angle, thereby correcting the twist angle of the voice coil wire, ensuring that no wiring error occurs when winding the subsequent turns of the voice coil 300, thereby improving the performance of the voice coil 300.

[0041] It should be noted that the first direction refers to the X direction of the attached coordinate system, and the second direction refers to the Y direction of the attached coordinate system.

[0042] In this embodiment, the first direction is the horizontal direction and the second direction is the vertical direction.

[0043] For example, such as Figure 3 and Figure 4 As shown, the adjustment assembly 3 includes a wire shaft 31 and a gear set 32. The gear set 32 ​​includes a meshing driving gear 322 and a driven gear 323. The driven gear 323 is coaxially connected to the wire shaft 31. The rotation center of the wire shaft 31 is provided with a wire hole 33. The rotation of the driving gear 322 can drive the driven gear 323 and the wire shaft 31 to rotate coaxially, and drive the voice coil wire to rotate synchronously, thereby achieving precise correction of the torsion angle of the voice coil wire.

[0044] Specifically, the gear set 32 ​​also includes a drive unit 321 and an angle sensor (not shown in the figure). In this embodiment, the drive unit 321 is a motor, the driving gear 322 is connected to the drive unit 321, the drive unit 321 is used to drive the driving gear 322 to rotate, and the angle sensor is used to detect the rotation angle of the gear set 32. When the driven gear 323 rotates to the preset rotation angle, the controller can control the drive unit 321 to self-lock or stop so that the gear set 32 ​​stops rotating.

[0045] Preferably, the frame 1 is further provided with a guide wheel assembly 4, which is located on the side of the adjusting assembly 3 away from the winding unit 200. The guide wheel assembly 4 is provided with a guide groove 41 for the voice coil wire to pass through. The width of the guide groove 41 is matched with the cross-section of the voice coil wire, which can further straighten the voice coil wire, prevent the voice coil wire from twisting during transportation, and reduce wear or scratches on the voice coil wire.

[0046] In order to reduce the friction between the voice coil wire and the guide wheel assembly 4, the guide wheel assembly 4 is made of nylon, cast aluminum, PVC, A3 steel, wood, etc.

[0047] Specifically, refer to Figures 2 to 4 The conductor wheel assembly 4 includes a conductor wheel body and a wire pressing block. The conductor wheel body is provided with a guide groove around its circumference. One end of the wire pressing block can extend into the guide groove and is spaced apart from the bottom of the guide groove. The voice coil wire can pass through the gap between the wire pressing block and the bottom of the guide groove. The wire pressing block can prevent the voice coil wire from detaching from the guide groove.

[0048] Preferably, at least two guide wheel assemblies 4 are spaced apart on the frame 1. When the voice coil wire passes through two adjacent guide wheel assemblies 4, the voice coil wire can first pass through the top of one guide wheel assembly 4 and then through the bottom of the other guide wheel assembly 4, so that the voice coil wire has a height difference between the two guide wheel assemblies 4, which helps the voice coil wire maintain tension and improves the wire smoothing effect.

[0049] In one embodiment, a tensioner (not shown) is also provided between the wire feeding unit and the guide wheel assembly 4. The voice coil wire is wound onto the winding unit 200 from the wire feeding unit, passing sequentially through the tensioner, the guide wheel assembly 4, and the adjusting assembly 3. The tensioner increases the tension of the voice coil wire so that the portion of the voice coil wire located between the wire feeding unit and the guide wheel assembly 4 is always taut, preventing the voice coil wire from twisting or knotting.

[0050] Preferably, both the guide wheel assembly 4 and the adjustment assembly 3 are slidably connected to the frame 1 along the second direction. This design allows for quick adjustment of the height difference between the guide wheel assembly 4 and the adjustment assembly 3, thereby adjusting the tightness of the voice coil wire.

[0051] In this embodiment, the frame 1 and the adjustment assembly 3 are connected by a first fastener, and the frame 1 and the lead wheel assembly 4 are connected by a second fastener. Specifically, both the first and second fasteners are screws, and both the first and second connecting holes are threaded holes. One of the frame 1 and the adjustment assembly 3 is provided with a first slotted hole 5, and the other is provided with a first connecting hole. The first fastener passes through the first slotted hole 5 and connects to the first connecting hole. Similarly, one of the frame 1 and the lead wheel assembly 4 is provided with a second slotted hole 6, and the other is provided with a second connecting hole. The second fastener passes through the second slotted hole 6 and connects to the second connecting hole. Excessive tension will damage the voice coil wire, while insufficient tension can easily lead to wire twisting. This design allows both the adjustment assembly 3 and the lead wheel assembly 4 to be adjusted and fixed to the frame 1 at different heights, thereby controlling the height difference between the lead wheel assembly 4 and the adjustment assembly 3, and thus adjusting the tension of the voice coil wire to prevent breakage.

[0052] It should be noted that the first fastener and the second fastener can also be bolts and nuts, with the bolt passing through the first strip hole 5 and the first connecting hole to be connected to the nut; the bolt can also pass through the second strip hole 6 and the second connecting hole to be connected to the nut.

[0053] Furthermore, for ease of installation, the frame 1 is provided with multiple mounting bases, and the adjustment assembly 3 and the guide wheel assembly 4 are respectively mounted on the mounting bases. Among them, the driving gear 322 and the driven gear 323 are respectively mounted on two mounting bases.

[0054] In this embodiment, the drive mechanism 2 includes a drive body 21 and a piston rod assembly 22. One end of the piston rod assembly 22 is connected to the drive body 21, and the other end is connected to the frame 1. The drive body 21 can drive the piston rod assembly 22 to reciprocate along a second direction, thereby realizing the reciprocating movement of the frame 1 in the second direction.

[0055] In order to improve the structural strength of the piston rod assembly 22, the piston rod assembly 22 is made of materials such as carbon steel, cast aluminum, PVC, alloy, and wood.

[0056] Specifically, the drive body 21 can be an electric motor. The electric motor can be made of materials such as conductor materials, insulating materials, adhesive composite materials, and organic materials.

[0057] Preferably, refer to Figure 2 and Figure 3 The drive mechanism 2 also includes a base, the drive body 21 is mounted on the base, a guide rod 23 is mounted on the base, and a guide hole for the guide rod 23 to pass through is mounted on the frame 1. The shape of the guide hole matches the cross-sectional shape of the guide rod. The guide rod can guide and limit the movement of the frame 1 to prevent the frame 1 from deviating.

[0058] It should be noted that the winding unit 200 can adopt the winding structure of the existing voice coil winding device, which will not be described in detail here.

[0059] The present invention also provides a winding method, which uses the voice coil winding device of the present invention to wind a voice coil wire with a square cross-section into a multi-layered voice coil 300, including the following steps:

[0060] Step S10: Preset the correction coil value and the rotation angle of the adjustment component 3 in the controller, wherein the correction coil value is the number of turns of the voice coil 300 before the first turn of the new layer is wound.

[0061] Step S20: Pass one end of the voice coil wire through the wire hole 33 of the winding unit 100 along the first direction and connect it to the winding unit 200 to wind the voice coil wire.

[0062] Step S30: Start the voice coil winding device. The winding unit 200 starts winding the voice coil 300. The drive mechanism 2 drives the frame 1 to move back and forth in the second direction so that the voice coil wire is laid out in the second direction to obtain the voice coil 300.

[0063] Step S40: During the winding process, the detection element synchronously counts the number of turns of the voice coil 300 on the winding unit 200. When the count value of the detection element is the same as the correction turn value, when winding the next turn, the controller controls the adjustment component 3 to rotate according to the rotation angle to correct the twist angle of the voice coil wire.

[0064] This method compares the count value of the detection element with the correction turn value during the winding process to determine whether the next turn is the first turn of a new layer. If the count value of the detection element is the same as the correction turn value, the adjustment component 3 is controlled to rotate at a preset rotation angle when winding the next turn to correct the twist angle of the voice coil wire, thereby ensuring that there will be no wiring errors when winding the voice coil wire in the subsequent winding, which helps to improve the performance of the voice coil 300.

[0065] Specifically, in step S10, the torsion angle of the voice coil is measured by repeatedly performing the winding test, and the rotation angle is obtained based on the torsion angle, wherein the rotation angle and the torsion angle have the same magnitude but opposite direction.

[0066] Because the voice coil wire can be laid at a constant speed, the force exerted on the voice coil wire during winding is the same each time, and the magnitude of the twist angle is also the same. However, different rotational speeds of the winding unit 200 will result in different forces on the voice coil wire, affecting the twist angle. Therefore, the corresponding rotation angles at different winding speeds are different.

[0067] For example, a database is established in the controller to obtain the rotation angle of various voice coil wires at different winding speeds through multiple experiments, and the data is pre-stored in the database, which helps to improve the winding efficiency of voice coil 300.

[0068] Specifically, the odd-numbered layers of the voice coil 300 have the same wiring direction, and the even-numbered layers of the voice coil have the same wiring direction.

[0069] Because the wiring directions of adjacent layers of the voice coil are different, the voice coil may twist or flip during the first turn of a new layer. For example, refer to... Figure 1The voice coil wire is wound from bottom to top in the first layer 301, and from top to bottom in the second layer 302. When starting the first turn of the second layer 302, the voice coil wire still tends to climb upwards, causing it to flip or twist. After the second layer 302 is completed, the voice coil wire is wound from bottom to top in the third layer 303. When starting the first turn of the third layer 303, the voice coil wire tends to climb downwards, again causing it to flip or twist. The twist angle of the second layer 302 and the twist angle of the third layer 303 are the same in magnitude but opposite in direction. Therefore, the rotation angle includes a first angle and a second angle.

[0070] Specifically, the number of layers of the voice coil 300 is X. When X≥2, when the voice coil wire is laid from the first side of the voice coil 300 along the second side of the voice coil 300, the rotation angle of the voice coil wire is the first angle. When X≥2, when the voice coil wire is laid from the second side along the first side, the rotation angle of the voice coil wire is the second angle. The first angle and the second angle have the same magnitude but opposite directions.

[0071] Preferably, in order to make the first layer 301 wires tightly wound and improve the wire winding effect of the first layer 301, the first layer 301 is wound from bottom to top on the winding unit 200.

[0072] Specifically, the detection items are counted by infrared sensing, microwave sensing, or a combination of functions.

[0073] For example, the detection device is an infrared sensor counter. The infrared sensor counter uses an infrared photodiode as a counting sensor. When an object passes by and is blocked, the receiving module outputs a high-level pulse, which is counted to realize the counting of the number of turns of the voice coil 300.

[0074] In another embodiment, the detection element is a microwave sensor. The microwave sensor can utilize microwaves emitted by a transmitting antenna, and the winding unit 200 is provided with a reflector for reflecting microwaves. The reflector has a specific frequency, and the receiving antenna of the microwave sensor can count the reflected waves received at a specific frequency.

[0075] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0076] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0077] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0078] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A voice coil winding device for winding a multi-layered voice coil, characterized in that, The voice coil winding device includes a winding unit and a straightening unit. The winding unit includes a frame, a drive mechanism, a detection element, and a controller. The frame is equipped with a rotatable adjustment component, which has a wire guide hole adapted to the voice coil wire. The voice coil wire can pass through the wire guide hole in a first direction and be wound onto the winding unit. The drive mechanism is connected to the frame and drives the frame to reciprocate in a second direction so that the voice coil wire is aligned in the second direction. The first direction is perpendicular to the second direction. The adjustment component and the detection element are respectively connected to the controller. The detection element is used to count the number of turns of the voice coil. The adjustment component rotates according to a preset rotation angle to correct the twist angle of the voice coil wire.

2. The voice coil winding device according to claim 1, characterized in that, The adjustment assembly includes a wire shaft and a gear set. The gear set includes a meshing driving gear and a driven gear. The driven gear is coaxially arranged with the wire shaft. The wire shaft has a wire hole at its rotation center. The rotation of the gear set can drive the wire shaft and the voice coil wire to rotate synchronously.

3. The voice coil winding device according to claim 2, characterized in that, The frame is also provided with a wire guide wheel assembly, which is located on the side of the adjustment assembly away from the winding unit. The wire guide wheel assembly is provided with a wire groove for the voice coil wire to pass through.

4. The voice coil winding device according to claim 3, characterized in that, Both the guide wheel assembly and the adjustment assembly are slidably connected to the frame along the second direction to adjust the tension of the voice coil wire.

5. The voice coil winding device according to claim 4, characterized in that, The frame and the adjustment assembly are connected by a first fastener. One of the frame and the adjustment assembly is provided with a first strip hole, and the other is provided with a first connecting hole. The first fastener passes through the first strip hole and connects with the first connecting hole. The frame and the guide wheel assembly are connected by a second fastener. One of the frame and the guide wheel assembly is provided with a second strip hole, and the other is provided with a second connecting hole. The second fastener passes through the second strip hole and connects with the second connecting hole.

6. The voice coil winding apparatus according to any one of claims 1 to 5, characterized in that, The drive mechanism includes a drive body and a piston rod assembly, one end of which is connected to the drive body and the other end of which is connected to the frame.

7. A winding method, characterized in that, Winding a multi-layered voice coil using the voice coil winding apparatus according to any one of claims 1 to 6 includes the following steps: Step S10: Preset the correction coil value and adjust the rotation angle of the component in the controller, wherein the correction coil value is the number of turns of the voice coil before the voice coil wire is wound to the first turn of the new layer; Step S20: Pass one end of the voice coil wire through the wire hole of the winding unit along the first direction and connect it to the winding unit to wind the voice coil wire; Step S30: Start the voice coil winding device, the winding unit starts winding the voice coil, and the drive mechanism drives the frame to reciprocate along the second direction so that the voice coil wire is laid along the second direction; Step S40: The detection element counts the number of turns of the voice coil. When the count value of the detection element is the same as the correction turn value, the controller controls the adjustment component to rotate according to the rotation angle to correct the twist angle of the voice coil wire.

8. The winding method according to claim 7, characterized in that, In step S10, the torsion angle of the voice coil is measured by repeatedly performing the winding test, and the rotation angle is obtained based on the torsion angle. Wherein, the torsion angle and the rotation angle are of the same magnitude but opposite in direction.

9. The winding method according to claim 7, characterized in that, The rotation angle includes a first angle and a second angle, the voice coil has a first side and a second side opposite to each other along the second direction, and the number of layers of the voice coil is X; When X≥2, when the voice coil wire is laid from the first side along the second side, the rotation angle of the voice coil wire is the first angle. When X≥2, when the voice coil wire is laid from the second side along the first side, the rotation angle of the voice coil wire is the second angle. The first angle and the second angle have the same magnitude but opposite directions.

10. The winding method according to claim 7, characterized in that, The detection element is counted by infrared sensing or microwave sensing.

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