Voice coil with double parallel wires and preparation process

Abstract

The invention relates to a voice coil with double parallel leads, which comprises a framework, a coil winding amplitude and leads, the coil winding amplitude and the leads are mounted on the framework, the coil winding amplitude is formed by winding the leads on the outer surface of the framework, and the leads are symmetrically mounted on the framework. The two wires are wound side by side, the voice coil can generate a stronger magnetic field under the same current through a superimposed effect, the magnetic field intensity generated by the voice coil is enhanced, and then the sound output of a generator borne by the voice coil is improved; through the design of the double parallel wires, current can be shunted in the wire groups at the two ends, and mutually balanced magnetic fields are generated at the same time, so that the stability of the voice coil is improved; the two wires at least comprise one copper-clad aluminum wire, and the copper-clad aluminum wire combines the excellent conductivity of copper and the lightweight characteristic of aluminum, so that the efficient transmission of electric signals is ensured, the overall weight is reduced, and the finally prepared voice coil is lighter while the high performance is maintained.

Description

Technical Field

[0001] The invention belongs to the technical field of voice coils, and in particular relates to a voice coil with double parallel conducting wires and a preparation process thereof. Background Art

[0002] In traditional voice coil design, a single wire is generally wound around the conductor, which can meet the basic requirements for the voice coil magnetic field. However, when faced with applications with high performance requirements, such as high-power audio equipment, a single wire may not be able to provide sufficient magnetic field strength to drive the sound generator to produce sufficient sound pressure, resulting in reduced sound quality and efficiency. In addition, when a single wire is set, most of it is pure copper wire or pure aluminum wire. Pure copper wire is heavy, while pure aluminum wire has poor conductivity. The deficiencies in weight and conductivity of the two limit the performance of the voice coil in high-performance applications.

[0003] In order to overcome these problems, copper-clad aluminum wire has gradually replaced pure copper wire and pure aluminum wire in the market. Copper-clad aluminum wire is a wire with copper as the outer layer and an aluminum core inside. It combines the excellent conductivity of copper and the lightweight properties of aluminum, allowing the voice coil to reduce weight while maintaining efficient electrical signal transmission.

[0004] However, the long-term use of a single copper-clad aluminum wire still has disadvantages when facing high-performance applications:

[0005] 1. Insufficient conductivity. Copper-clad aluminum wire has similar conductivity to pure copper wire when transmitting high-frequency signals. However, under DC or low-frequency signals, due to the high conductivity of its aluminum core, the DC resistance of copper-clad aluminum wire is large, and its conductivity is not as good as pure copper wire. After long-term use, it may increase power consumption;

[0006] 2. Aluminum is prone to oxidation, especially in humid or high temperature environments, which may lead to increased resistance and decreased performance for components such as voice coils that need to operate stably for a long time;

[0007] 3. The mechanical properties (including strength, toughness, etc.) of copper-clad aluminum wire are different from those of pure copper wire, which will affect the durability and stability of the voice coil.

[0008] Therefore, a voice coil with dual parallel wires and a preparation process are designed, which is provided with at least one copper-clad aluminum wire. The conductive properties and mechanical properties of the voice coil are optimized by adjusting the proportion of different materials used to prepare the wires. At the same time, a greater current carrying capacity is provided by parallel wire winding, which is suitable for higher performance voice coil output. Summary of the invention

[0009] The object of the present invention is to provide a voice coil with dual parallel conductors and a preparation process to solve the problems raised in the above background technology.

[0010] To achieve the above object, the first aspect of the present invention provides a voice coil with dual parallel wires, comprising a frame, a coil web mounted on the frame, and lead wires, wherein the coil web is formed by winding the wires around the outer surface of the frame, and the lead wires are symmetrically mounted on the frame;

[0011] The number of the conductors is at least 2, which are divided into wire a and wire b. The material of wire a is copper-clad aluminum, and the material of wire b is copper.

[0012] Preferably, the number of the a-wire is 1, the number of the b-wire is 1, and the a-wire and the b-wire are wound in parallel.

[0013] Preferably, the a-line and the b-line are connected to form a c-line.

[0014] Preferably, the number of the c-wires is 2, which are wound in parallel.

[0015] Preferably, the number of the c-lines is 1, and among the c-lines, a section of the b-line is wound from one end of the skeleton to the other end, and the a-line is wound from the other end of the skeleton to one end, and the a-line overlaps above the b-line.

[0016] Preferably, in a direction from one end of the skeleton to the other end of the skeleton, the wires are arranged at intervals on the outside of the skeleton.

[0017] Preferably, the cross section of the copper clad aluminum wire is rectangular, and the cross section of the aluminum core is circular.

[0018] Preferably, the a-wire and the b-wire are bonded using insulating varnish.

[0019] Preferably, the skeleton is in the shape of a cylinder or a regular polygonal cylinder.

[0020] A second aspect of the present invention provides a process for preparing a voice coil having dual parallel conductors, comprising the following steps:

[0021] S1 prepares copper clad aluminum wire;

[0022] S2 uses insulating paint to bond the copper-clad aluminum wire and the copper wire to obtain a double parallel conductor;

[0023] S3 prepares the skeleton;

[0024] S4 connecting leads form two electrodes at both ends of the skeleton;

[0025] S5 winds the double parallel wires on the frame to prepare a voice coil with the double parallel wires;

[0026] Wherein, the preparation method of copper clad aluminum wire is:

[0027] S101 ingredients copper alloy and aluminum alloy are cleaned and dried respectively and then placed in a smelting furnace;

[0028] S102 smelts the copper alloy until it is completely clear, and then flows the copper alloy into a ring-shaped crystallizer to form a copper alloy tube billet;

[0029] S103 waits for the copper alloy tube billet to cool down to 550-560°C;

[0030] S104 smelts the aluminum alloy until it is completely clear, and fills the smelted aluminum alloy into the copper alloy tube billet to obtain a copper-clad aluminum material;

[0031] S105 draws the copper-clad aluminum material through a wire drawing die for 15 to 30 passes to obtain a copper-clad aluminum wire.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention uses two wires wound side by side, and through the "superposition effect", the voice coil can generate a stronger magnetic field under the same current, thereby enhancing the magnetic field strength generated by the voice coil and thus improving the sound output of the generator carried by the voice coil;

[0034] The design of the double parallel conductors in the present invention can divide the current into the conductor groups at both ends, and simultaneously generate a mutually balanced magnetic field, thereby improving the stability of the voice coil;

[0035] In the present invention, at least one of the two conductors includes a copper-clad aluminum wire, which combines the excellent conductivity of copper and the lightweight characteristics of aluminum, thereby ensuring efficient transmission of electrical signals and reducing the overall weight, so that the voice coil finally prepared is more lightweight while maintaining high performance;

[0036] In the present invention, copper-clad aluminum wire is combined with copper wire and aluminum wire, and the conductivity and mechanical properties of the voice coil are optimized by adjusting the different proportions of copper and aluminum. At the same time, the adaptability and thermal management ability of the voice coil are improved, and the lightweight and energy-saving effects of the final product (sound generator) are achieved.

[0037] The present invention also provides a rectangular wire design, which can leave no gaps when arranged closely, and is more helpful to improve the power and carrying capacity of the voice coil;

[0038] The present invention also uses insulating paint to bond the wires to the outside of the frame, which helps to arrange the wires more closely and evenly on the voice coil frame during the winding process of the voice coil, making the overall structure of the voice coil more compact and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0040] Figure 2This is a first state diagram of the voice coil in the present invention;

[0041] Figure 3 for Figure 2 Schematic diagram of the wires in the voice coil;

[0042] Figure 4 is a second state diagram of the voice coil in the present invention;

[0043] Figure 5 for Figure 4 Schematic diagram of the wires in the voice coil;

[0044] Figure 6 is a third state diagram of the voice coil in the present invention;

[0045] Figure 7 for Figure 6 Schematic diagram of the wires in the voice coil;

[0046] Figure 8 is a fourth state diagram of the voice coil in the present invention;

[0047] Fig. 9 for Figure 8 Schematic diagram of the wires in a voice coil.

[0048] Numbers in the figure: 1-skeleton, 2-coil width, 201-conductor, 3-lead, 4-reinforcement paper. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

[0051] like Figures 1 to 9A voice coil with double parallel wires shown in the figure comprises a frame 1, a coil web 2 mounted on the frame 1 and a lead 3, wherein the coil web 2 is formed by winding a wire 201 around the outer surface of the frame 1, and the lead 3 is symmetrically mounted on the frame 1; wherein the number of the wires 201 is at least 2, which are divided into a wire and b wire, the material of the a wire is copper-clad aluminum, and the material of the b wire is copper; the number of a wire is 1, the number of b wire is 1, and the a wire and the b wire are wound in parallel; the a wire and the b wire are connected to form a c wire; the number of c wires is 2, and they are wound in parallel; the number of c wires is 1, and among the c wires, a section of the b wire is wound from one end of the frame 1 to the other end, and the a wire is wound to one end through the other end of the frame 1, and the a wire overlaps above the b wire; in the direction from one end of the frame 1 to the other end of the frame 1, the wires 201 are arranged at intervals on the outside of the frame 1; the cross section of the copper-clad aluminum is rectangular, and the cross section of the aluminum core is circular; the a wire and the b wire are bonded using insulating paint; the shape of the frame 1 is any one of a cylinder and a regular polygon cylinder.

[0052] A process for preparing a voice coil having dual parallel conductors comprises the following steps:

[0053] S1 prepares copper clad aluminum wire;

[0054] S2: bonding the copper clad aluminum wire and the copper wire using insulating paint to obtain a double parallel wire 201;

[0055] S3 prepares skeleton 1;

[0056] S4 connects the lead wire 3 to form two electrodes at both ends of the frame 1;

[0057] S5: Winding the double parallel wire 201 on the frame 1 to prepare a voice coil with the double parallel wire;

[0058] Wherein, the preparation method of copper clad aluminum wire is:

[0059] S101 ingredients copper alloy and aluminum alloy are cleaned and dried respectively and then placed in a smelting furnace;

[0060] S102 smelts the copper alloy until it is completely clear, and then flows the copper alloy into a ring-shaped crystallizer to form a copper alloy tube billet;

[0061] S103 waits for the copper alloy tube billet to cool down to 550-560°C;

[0062] S104 smelts the aluminum alloy until it is completely clear, and fills the smelted aluminum alloy into the copper alloy tube billet to obtain a copper-clad aluminum material;

[0063] S105 draws the copper-clad aluminum material through a wire drawing die for 15 to 30 passes to obtain a copper-clad aluminum wire.

[0064] The present invention uses two wires 201 wound side by side, and through the "superposition effect", the voice coil can generate a stronger magnetic field under the same current, thereby enhancing the magnetic field strength generated by the voice coil, and thus improving the sound output of the generator carried by the voice coil; the design of the double parallel wires 201 in the present invention can make the current shunt in the wire groups 201 at both ends, and at the same time generate a mutually balanced magnetic field, thereby improving the stability of the voice coil; the two wires 201 in the present invention include at least one copper-clad aluminum wire, which combines the excellent conductivity of copper and the lightweight characteristics of aluminum, thereby ensuring the efficient transmission of electrical signals and reducing the overall weight, so that the voice coil finally prepared is more lightweight while maintaining high performance; In the present invention, copper-clad aluminum wire is combined with copper wire and aluminum wire, and the conductivity and mechanical properties of the voice coil are optimized by adjusting the different proportions of copper and aluminum. At the same time, the adaptability and thermal management capabilities of the voice coil are improved, and the lightweight and energy-saving effects of the final product (sound generator) are achieved; the present invention also provides a rectangular wire 201 design, which can leave no gaps when arranged tightly, and is more helpful to improve the power and carrying capacity of the voice coil; the present invention also uses insulating paint to bond the wire 201 to the outside of the frame 1, which helps to arrange the wire 201 more tightly and evenly on the voice coil frame 1 during the winding process of the voice coil, so that the overall structure of the voice coil is more compact and stable.

[0065] Example 2

[0066] like Figures 1 to 9 A voice coil with double parallel wires shown in the figure comprises a skeleton 1, a coil web 2 mounted on the skeleton 1 and a lead 3. The cross section of the skeleton 1 is circular and is made of alloy steel. Compared with common materials such as kraft paper, asbestos paper, polyimide, aluminum foil, copper foil, etc., alloy steel has better strength and is more suitable for stable installation on various specifications of component platforms. In actual applications, considering that the circular skeleton 1 is not stable enough, when the voice coil drives the speaker to vibrate through the audio current, it is easy to be collided and detached, and the stability and safety are insufficient. Therefore, the shape of the skeleton 1 can also be set to a polygon, including but not limited to a quadrilateral, a hexagon and an octagon, and all adopt a length ratio, that is, the length of each side is the same, and the angle between the sides is also the same. At the same time, the shape of the coil web 2 is the same as that of the skeleton 1, that is, each wire 201 is wound close to the edge of the skeleton 1, and the shape of the coil web 2 formed is naturally the same as that of the skeleton 1. The above settings can effectively improve the rigidity of the skeleton 1 and improve the structural stability.

[0067] The coil width 2 is formed by winding the wire 201 around the outer surface of the frame 1, the number is at least 2, and a double parallel winding setting is adopted. Different from parallel winding, parallel winding generally refers to tightly winding two or more wires 201 to form a spiral shape, which is used to fix the wires 201 and increase the stability of the connection; while double parallel winding refers to placing two wires 201 side by side and then winding them at the same time. When the double parallel group is connected to the power supply, the current will be divided into the two wires 201 groups, and a mutually balanced magnetic field will be generated at the same time, thereby improving the stability of the voice coil.

[0068] Correspondingly, a lead wire 3 is symmetrically arranged on the right side of the frame 1 (i.e., away from the coil web 2). The lead wire 3, as the core part of the conductor, can be wound with high-temperature resistant enameled copper wire or tinned copper wire, and is fixed to the lead wire 3 by a reinforcing paper 4 to prevent the lead wire 3 from loosening or falling off during vibration, thereby indirectly enhancing the rigidity of the frame 1 and making it more durable. For easy understanding, the specific assembly process is as follows:

[0069] Place at least two wires 201 side by side, and then wrap them from the left side to the right side of the frame 1 until the wires 201 are arranged horizontally on the outside of the frame 1, and then use insulating paint to bond the wires 201 to the outside of the frame 1, and then symmetrically weld the leads 3 on the right side of the frame 1, and use reinforcing paper 4 to strengthen the fixation of the leads 3.

[0070] Among them, the wires 201 wound in parallel on the voice coil are bonded by insulating paint, which not only provides protection for the wires 201, but also effectively isolates the direct contact between the wires 201 to prevent the current from short-circuiting between the wires 201. At the same time, it can also increase the adhesion between the wires 201, which helps to arrange the wires 201 more tightly and evenly on the voice coil frame 1 during the winding process of the voice coil, making the overall structure of the voice coil more compact and stable, avoiding affecting the vibration effect and sound output of the voice coil.

[0071] It should be noted that the width of the wire 201 after being wound side by side on the outside of the frame 1 also determines the effect of the voice coil, that is, the distance between the leftmost and rightmost sides of the wire 201. A smaller width indicates low frequency, and a larger width indicates medium and high frequency. The user can wind it according to the actual needs of the sound generator.

[0072] Example 3

[0073] like Figures 1 to 9The voice coil with double parallel wires shown mainly includes a hollow frame 1 with a circular cross section, and two double parallel wires 201 wound on the frame 1. It should be noted that the vibration of the voice coil is mainly generated by the current passing through the wire 201, and the magnetic field around the wire 201 will interact with the external magnetic field (such as the magnetic field generated by the permanent magnet), thereby generating electromagnetic force; specifically, when the AC audio current output by the power amplifier passes through the voice coil, the voice coil generates an audio magnetic field through the wire 201, which interacts with the external magnetic field, and the generated interaction force drives the voice coil to vibrate back and forth in the magnetic field according to the strength and direction of the audio current.

[0074] That is, the quality of the magnetic field generated by the voice coil, in applications based on the wire 201 , is mainly reflected in the following aspects: the number of wires 201 , the shape of the wires 201 , the material of the wires 201 , the direction of the current, and the arrangement of the wires 201 .

[0075] 1. Wire 201 quantity:

[0076] Compared with the conventional winding of one wire 201, two wires 201 are wound side by side, and when the current directions of the two wires are consistent, the wires 201 are connected head to head and tail to tail in an impedance parallel manner. The magnetic fields generated by the two wires 201 are superimposed on each other, thereby enhancing the overall magnetic field strength, i.e., the "superposition effect". This superposition effect enables the voice coil to generate a stronger magnetic field under the same current, thereby improving the sound output of the sound generator carried by the voice coil;

[0077] 2. Wire 201 material:

[0078] Wires 201 made of different materials differ in conductivity, weight, vibration efficiency, and even production cost. Common wires are copper wire, aluminum wire, and copper-clad aluminum wire. Copper wire has greater conductivity and power carrying capacity than aluminum wire, and is suitable for medium and low frequency sounds. Aluminum wire has a lower density than copper wire, so its vibration efficiency is higher than copper wire, and is more suitable for high frequency sounds. Copper-clad aluminum wire combines the advantages of copper wire and aluminum wire, and has both the thick and delicate medium and low frequency characteristics of copper wire and the good low and high frequency characteristics of aluminum wire.

[0079] 3. Wire 201 shape:

[0080] The conductor 201 has various shapes. When copper wire is used as the conductor 201, it can have a circular, hexagonal and rectangular cross section. The circular copper wire is the most common, while the hexagonal and rectangular copper wires can be closely arranged without gaps, which is more helpful to improve the power carrying capacity.

[0081] 4. Current direction:

[0082] When the current directions of the two are consistent, the wires 201 are connected head to head and tail to tail by using impedance parallel connection, which can enhance the strength of the entire magnetic field. When the current directions of the two are inconsistent, the magnetic fields formed will cancel each other out. At this time, the wires 201 are connected head to tail in sequence by impedance series connection to form a closed loop.

[0083] 5. Wire 201 arrangement

[0084] Similar to the first point, when the closely arranged wires 201 are energized, the magnetic fields generated by each of them will be superimposed in space, and mutual induction will also be generated, that is, when the current in one wire 201 changes, it will generate an induced electromotive force in another wire 201. This interaction will also enhance the magnetic field of the wire 201. How to arrange them can also depend on the actual situation.

[0085] In summary, the present invention proposes a plurality of technical solutions based on the number of the wires 201 being two, the wires 201 being closely arranged, and other conditions being adjusted.

[0086] Example 4

[0087] like Figures 1 to 9 A voice coil with dual parallel conductors is shown, mainly comprising a hollow frame 1 with a circular cross-section, and a conductor 201 wound on the outer surface of the frame 1. The number of conductors 201 is 2, which are divided into a wire and a wire. The material of the a wire is copper-clad aluminum, and the material of the b wire is copper. The a wire and the b wire are connected to form a c wire.

[0088] The combination table can be:

[0089]

[0090] Note: "-" in the table means data is not available.

[0091] Specifically, Figure 2-3 A voice coil is shown, the voice coil mainly includes a hollow frame 1 with a circular cross-section, and a wire 201 wound on the outer surface of the frame 1, the number of the wires 201 is 2, and the shape is circular, wherein the copper wire is outside and the copper-clad aluminum wire is inside, and the two ends are arranged side by side and synchronously wound on the outer surface of the frame 1, when the current directions of the copper wire and the copper-clad aluminum wire are the same, according to the basic principles of electromagnetism, they will generate a magnetic field force that attracts each other, and the magnetic fields formed by the two wires 201 will tend to be consistent, that is, the magnetic induction lines will tend to be in the same direction, which is more conducive to the voice coil to form a magnetic field; at the same time, considering that when the current directions of the two wires 201 are the same, the closer the two wires 201 are arranged, the more the magnetic fields formed will enhance each other, so in this embodiment, it is defined that the current directions of the copper wire and the copper-clad aluminum wire are consistent and closely arranged to form a strong magnetic field.

[0092] like Figure 4-5 As shown, the voice coil mainly includes a hollow frame 1 with a circular cross section, and a wire 201 wound on the outer surface of the frame 1. The number of wires 201 is 2, and the shape is circular. The two wires 201 are both c-wires. The c-wire is specifically a copper wire connected to a copper-clad aluminum wire. The end of the copper wire is the starting end of the winding, and the end of the aluminum-clad copper is the end of the winding. When the current directions of the copper wire and the copper-clad aluminum wire are consistent, the entire c-wire will be driven to form a circuit, and the magnetic field strength of the entire voice coil can also be increased after being connected in series. Therefore, in this embodiment, the copper wire ends of the two c-wires are arranged side by side, and are synchronously wound on the outer surface of the frame 1, and the current directions of the C-wires are consistent and closely arranged to form a strong magnetic field.

[0093] like Figure 6-7 As shown, the voice coil mainly includes a hollow frame 1 with a circular cross-section, and a wire 201 wound on the outer surface of the frame 1, and the shape is circular. The number of the wire 201 is 1, and it is made of overlapping c-wires. It is known that the c-wire is prepared by connecting copper wires with copper-clad aluminum wires. The specific winding method is that the copper wire end in the c-wire starts to be wound through the left side of the frame 1, and is tightly arranged until the copper wire part ends. Then the copper-clad aluminum wire is stacked on the copper coil, and is wound back to the left side of the frame 1 through the right side of the frame 1 until the end of the copper-clad aluminum wire is located above the copper wire end, forming a closed loop and generating a magnetic field; wherein, the consumables of winding the copper wire first will be less than those of winding the copper wire on the outer layer, which can be determined according to the actual situation in actual applications.

[0094] like Figure 8-9 As shown, the voice coil mainly includes a hollow frame 1 with a circular cross-section, and a wire 201 wound on the outer surface of the frame 1. The number of the wires 201 is 2, and the shape is rectangular, wherein the copper wire is outside and the copper-clad aluminum wire is inside. The cross-section of the aluminum-clad copper wire is rectangular, and the cross-section of the aluminum core is circular. After the two ports are arranged side by side, they are synchronously wound on the outer surface of the frame 1. When the current directions of the copper wire and the copper-clad aluminum wire are the same, according to the basic principles of electromagnetism, they will generate a magnetic field force that attracts each other, and the magnetic fields formed by the two wires 201 will tend to be consistent, that is, the magnetic induction lines will tend to be in the same direction, which is more conducive to the formation of a magnetic field by the voice coil; and the rectangular wire 201 design can leave no gaps when arranged tightly, which is more conducive to improving the power and carrying capacity of the voice coil.

[0095] In general, this embodiment mainly adopts copper-clad aluminum wire as one of the parallel wires, and is assisted by wires of other materials (pure copper wire or pure aluminum wire) for parallel arrangement. It can not only ensure the basic electrical performance, but also improve the adaptability and thermal management capabilities of the voice coil, thereby achieving lightweight and energy-saving effects on the final product (sound generator).

[0096] The specific manifestations are:

[0097] Copper clad aluminum wire is made of aluminum wire wrapped in copper layer. It combines the excellent conductivity of copper and the lightweight characteristics of aluminum, which not only ensures the efficient transmission of electrical signals, but also reduces the overall weight, making the final voice coil lighter while maintaining high performance; when copper clad aluminum wire is used with copper wire, the conductivity can be further improved to ensure the response speed of the voice coil at high frequencies and the clarity of sound quality; and when combined with aluminum wire, it can reduce costs to a certain extent while maintaining good conductivity and flexibility. At the same time, due to the good heat dissipation performance of its internal aluminum core and the fast heat conduction of the outer copper skin, the copper clad aluminum wire can effectively disperse the heat generated by the voice coil during operation, avoiding the performance degradation caused by overheating of the voice coil. Compared with pure copper double wire, the combination of copper clad aluminum wire and copper wire can maintain better heat dissipation and provide more stable electrical signal transmission; and compared with pure aluminum double wire, the combination of copper clad aluminum wire and aluminum wire will have better stability under long-term high-load work.

[0098] As mentioned above, users can choose to use copper wire and aluminum wire according to different needs to meet the needs of different application scenarios. Whether it is a high-end product with high sound quality requirements or a popular product with a focus on cost performance, the ratio of copper-clad aluminum wire to copper wire or aluminum wire can be adjusted to achieve the best balance between performance and cost, while meeting the needs of different consumer groups.

[0099] Example 5

[0100] This embodiment provides a voice coil preparation process with double parallel wires. This process is not specifically limited. Any wire drawing process in the art can be used. The coating can also be performed by referring to the method described in patent CN116479272A:

[0101] S1 prepares copper clad aluminum wire;

[0102] S2: bonding the copper clad aluminum wire and the copper wire using insulating paint to obtain a double parallel wire 201;

[0103] S3 prepares skeleton 1;

[0104] S4 connects the lead wire 3 to form two electrodes at both ends of the frame 1;

[0105] S5: Winding the double parallel wire 201 on the frame 1 to prepare a voice coil with the double parallel wire;

[0106] Wherein, the preparation method of copper clad aluminum wire is:

[0107] S101 ingredients copper alloy and aluminum alloy are cleaned and dried respectively and then placed in a smelting furnace;

[0108] S102 smelts the copper alloy until it is completely clear, and then flows the copper alloy into a ring-shaped crystallizer to form a copper alloy tube billet;

[0109] S103 waits for the copper alloy tube billet to cool down to 550-560°C;

[0110] S104 smelts the aluminum alloy until it is completely clear, and fills the smelted aluminum alloy into the copper alloy tube billet to obtain a copper-clad aluminum material;

[0111] S105 draws the copper-clad aluminum material through a wire drawing die for 15 to 30 passes to obtain a copper-clad aluminum wire.

[0112] In “stretching the copper-clad aluminum material through a wire drawing die for 15 to 30 times to obtain a copper-clad aluminum wire”, the continuous drawing and annealing process is mainly used for preparation.

[0113] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0114] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A voice coil with dual parallel wires, comprising a frame, a coil winding and a lead wire mounted on the frame, characterized in that: The coil width is formed by winding a wire around the outer surface of the frame, and the lead wire is symmetrically mounted on the frame; The number of the conductors is at least 2, which are divided into wire a and wire b. The material of wire a is copper-clad aluminum, and the material of wire b is copper.

2. A voice coil with dual parallel conductors according to claim 1, characterized in that: The number of the a-wire is 1, the number of the b-wire is 1, and the a-wire and the b-wire are arranged in parallel and wound.

3. A voice coil with dual parallel conductors according to claim 1, characterized in that: The a line and the b line are connected to form a c line.

4. A voice coil with dual parallel conductors according to claim 3, characterized in that: The number of the c-wires is 2, which are wound in parallel.

5. The voice coil with dual parallel conductors according to claim 3, characterized in that: The number of the c-lines is 1, and among the c-lines, a section of the b-line is wound from one end of the skeleton to the other end, and the a-line is wound from the other end of the skeleton to one end, and the a-line overlaps above the b-line.

6. The voice coil with dual parallel conductors according to claim 1, characterized in that: In a direction from one end of the frame to the other end of the frame, the wires are arranged at intervals outside the frame.

7. The voice coil with dual parallel conductors according to claim 1, characterized in that: The cross section of the copper clad aluminum wire is rectangular, and the cross section of the aluminum core is circular.

8. The voice coil with dual parallel conductors according to claim 1, characterized in that: The a-wire and b-wire are bonded using insulating varnish.

9. The voice coil with dual parallel conductors according to claim 1, characterized in that: The shape of the skeleton is any one of a cylinder and a regular polygonal cylinder.

10. A process for preparing a voice coil having dual parallel conductors, comprising the following steps: S1 prepares copper clad aluminum wire; S2 uses insulating paint to bond the copper-clad aluminum wire and the copper wire to obtain a double parallel conductor; S3 prepares the framework; S4 connects the lead wires at two ends of the frame to form two electrodes; S5: Winding the biparallel conductors on the frame to prepare a voice coil having the biparallel conductors; Wherein, the preparation method of copper clad aluminum wire is: S101 ingredients copper alloy and aluminum alloy are cleaned and dried respectively and then placed in a smelting furnace; S102 smelts the copper alloy until it is completely clear, and then flows the copper alloy into a ring-shaped crystallizer to form a copper alloy tube billet; S103 waits for the copper alloy tube billet to cool down to 550-560°C; S104 smelts the aluminum alloy until it is completely clear, and fills the smelted aluminum alloy into the copper alloy tube billet to obtain a copper-clad aluminum material; S105 draws the copper-clad aluminum material through a wire drawing die for 15 to 30 passes to obtain a copper-clad aluminum wire.

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