Audio high-fidelity two-in-one ClassD inductor production process and inductor

Abstract

The invention relates to the field of electronic component design and manufacturing, and discloses an audio high-fidelity two-in-one ClassD inductor production process and an inductor, and the audio high-fidelity two-in-one ClassD inductor production process comprises the following steps: S1, winding a coil, before winding, carrying out single-side paint stripping treatment on the wire in advance, and reserving an electrode leading-out point; s2, a T-core, a U-core and an I-core are prepared in advance, and a cavity is formed in the U-core, so that the inductor has electrical characteristics; s3, carrying out bending operation on the flat wire coil; s4, firstly, the U-core is put into a hot pressing mold; and S5, uniformly spraying a layer of insulating paint on the surface of the inductor monomer, and stripping the size of the bonding pad to be electroplated by using laser. The audio high-fidelity two-in-one inductor which is high in electrode surface flatness, low in magnetic resistance, ultralow in copper loss, excellent in frequency response characteristic and low in THD + N characteristic is produced through the process, the product can be widely applied to intelligent cabin vehicle-mounted sound systems, commercial sound systems and household surround sound systems, and higher-quality audio experience can be further provided.

Description

Technical Field

[0001] The present invention relates to the field of electronic component design and manufacturing, and in particular to a production process of an audio high-fidelity two-in-one Class D inductor and an inductor. Background Art

[0002] As audio equipment continues to develop towards high fidelity, miniaturization, and multifunctionality, the performance requirements for inductors are becoming increasingly stringent. When processing audio signals, traditional inductors are difficult to simultaneously meet the requirements of high fidelity, high efficiency, and compact structure. For example, signal distortion and high energy loss may occur in the filtering and amplification links, prompting the development of more advanced inductor production processes and products.

[0003] The existing Class D inductor design uses round wire to weld to the lead frame, and then cold presses with magnetic powder to form the inductor structure, in which part of the lead frame structure is used as the lead electrode of the inductor to achieve connection with the circuit. However, this process has irregular wire package: due to the use of round wire, the wound wire package structure is irregular, which is easy to be scattered during pressing and forming, resulting in the copper wire of the inductor body being exposed, affecting the consistency and reliability of the product, poor welding contact: the welding of the wire package to the lead frame usually adopts the spot welding process, which is easy to break the wire during pressing and board use vibration, resulting in poor contact, thereby increasing the risk of circuit failure, poor pad flatness: since the wire package is a round wire welded lead frame structure, part of the lead frame structure is used as the lead electrode of the inductor, the lead frame is bent and has a low flatness, which is easy to cause the board to be poorly soldered, affecting the assembly quality, and poor audio application performance: the Class D inductors produced by the existing process have poor frequency response characteristics in the power amplifier system, and the THD+N (total harmonic distortion + noise) is high, which cannot meet the needs of high-fidelity audio. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a production process and an inductor for an audio high-fidelity two-in-one Class D inductor, which solve the problems that the irregular wire package of the inductor affects the consistency and reliability of the product, the poor welding contact increases the risk of circuit failure, and the poor flatness of the pad cannot meet the requirements of high-fidelity audio.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A production process for an audio high-fidelity two-in-one Class D inductor, comprising the following steps:

[0006] S1. Wind the coil first. Before winding, strip the paint on one side of the wire in advance and reserve the electrode lead-out point, which is used to prepare for the subsequent circuit connection.

[0007] S2, preparing T-core, U-core and I-core in advance, wherein a cavity is provided inside the U-core so as to allow the inductor to have electrical characteristics;

[0008] S3, bending the flat wire coil, and then combining the bent coil with the T-core to form a preliminary assembly;

[0009] S4. First, put the U-core into the hot pressing mold, then fill the T-core into the mold cavity of the hot pressing mold, and finally put the I-core in, and then perform hot pressing. During the hot pressing process, the copper wire of the inductor monomer must be leaked;

[0010] S5. Spray a layer of insulating paint evenly on the surface of the inductor monomer, use laser paint stripping to peel out the size of the pad to be electroplated, and then use the electroplating process to form the electrode surface of the inductor. Then perform the glue dispensing operation to bond the two together to complete the assembly work, and finally stick the Mylar.

[0011] Preferably, in S1, the coil is wound with flat wire, wherein the total winding thickness is 2.45-2.5mm, the single layer thickness is 0.25, wherein the tolerance of the single layer thickness is +0.5mm and -0.1mm, the width is 6.5±0.5mm, the length of the reserved electrode lead-out point is 8±0.5mm, wherein the solder can enter the circle -0.5-1mm, and the reserved lead-out electrode lead-out point can be peeled on the front without soldering.

[0012] Preferably, in S2, the cavity design of the U-core adopts a teardrop-shaped cavity, and the teardrop-shaped cavity is used to ensure that the inductor monomer has sufficient powder, and the powder includes iron powder, cobalt powder, nickel powder, silica powder and zinc stearate, wherein the mass percentage of iron powder is 70%-80%, the mass percentage of cobalt powder is 5%-10%, the mass percentage of nickel powder is 3%-8%, and the mass percentage of silica powder and zinc stearate is 0.5%-2%.

[0013] Preferably, in S3, the bending operation includes one fold and two folds, and the bending angles of the one fold and the two folds are both 90°, wherein the bending tolerance is ±0.1°.

[0014] Preferably, in S4, the leaked copper wire is used as a connection point for electrode lead-out in a subsequent process, and the hot pressing molding temperature is 150-300° C., and the hot pressing time is 5-30 minutes.

[0015] Preferably, in S5, the spraying of a layer of insulating paint is used to improve the rust resistance and voltage resistance level of the monomer, the electroplating solution includes a copper sulfate electroplating solution with a concentration of 100-300 g / L, a sulfuric acid concentration of 50-150 g / L, and an electroplating time of 10-30 minutes, and the glue for dispensing includes epoxy glue, the glue dot diameter is 0.5-2 mm, and the glue dispensing amount is 5-20 μL.

[0016] An audio high-fidelity two-in-one Class D inductor comprises a first inductor monomer and a T-core body, wherein an inner wall of the first inductor monomer is provided with an electrode surface reserved connection, an outer wall of the first inductor monomer is provided with an electrode surface body, the outer wall of the electrode surface body is slidably connected to the opening of the electrode surface reserved connection, the electrode surface body is L-shaped and attached to the lower outer wall of the first inductor monomer, a connecting colloid is provided on the upper surface of the first inductor monomer, a second inductor monomer is slidably connected to the upper surface of the first inductor monomer, an outer wall of the connecting colloid is provided in the middle of the second inductor monomer and the first inductor monomer, the connecting colloid is used to adhere the second inductor monomer and the first inductor monomer, and Mylar is provided on the rear outer walls of the second inductor monomer and the first inductor monomer.

[0017] Preferably, the upper surface of the T-core body is fixedly connected to a U-core body, the outer wall of the U-core body is provided with a wound electrode wire, the outer wall of the U-core body is slidably connected to an I-core body, a groove body is provided inside the I-core body, and the outer wall of the U-core body is slidably connected to the inside of the groove body.

[0018] The invention provides a production process of an audio high-fidelity two-in-one Class D inductor and an inductor.

[0019] It has the following beneficial effects:

[0020] 1. The present invention uses this process to produce an audio high-fidelity two-in-one inductor with high electrode surface flatness, low magnetic resistance, ultra-low copper loss, excellent frequency response characteristics, and low THD+N characteristics. This product can be widely used in smart cockpit car audio, commercial audio, and home surround sound systems, and can further provide a higher quality audio experience.

[0021] 2. The iron powder of the present invention provides a strong magnetic foundation, the cobalt powder enhances the coercive force and residual magnetic properties, so that the inductor performance remains stable in a complex electromagnetic environment, ensuring accurate restoration of audio signals, the nickel powder improves the magnetic permeability and electromagnetic coupling effect, optimizes the electromagnetic induction process, the silicon dioxide powder ensures the uniform distribution of the magnetic powder, avoids magnetic field anomalies, and the zinc stearate improves the quality and efficiency of magnetic powder molding. During use, the electromagnetic performance, stability and reliability of the inductor are effectively improved, helping to achieve high-fidelity audio processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a flow chart of a production process of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0023] Figure 2 It is a schematic diagram of the front side of a first inductor monomer of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0024] Figure 3 It is a partial schematic diagram of a first inductor monomer of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0025] Figure 4 It is a partial schematic diagram of the upper side of a T-core body of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0026] Figure 5 It is a partial schematic diagram of the upper side of an I-core body of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0027] Figure 6 A schematic diagram of a 24-hole hot pressing mold for a production process of a Class D audio high-fidelity two-in-one inductor of the present invention;

[0028] Figure 7 A schematic diagram of a 24-hole hot pressing die upper punch for a production process of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0029] Figure 8 A schematic diagram of a 24-hole hot pressing mold limit block for a production process of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0030] Fig. 9 It is a schematic diagram of a T-core cold pressing die upper punch of a production process of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0031] Fig.10 A schematic diagram of a T-core cold pressing mold for a production process of a high-fidelity audio 2-in-1 Class D inductor of the present invention;

[0032] Fig.11 A schematic diagram of a T-core cold pressing die for a production process of a high-fidelity audio 2-in-1 Class D inductor according to the present invention;

[0033] Fig.12 It is a schematic diagram of the lower two punches of a T-core cold pressing die of a production process of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0034] Fig.13 It is a schematic diagram of a U-CORE cold pressing one-out-three-die upper punch of a production process of an audio high-fidelity two-in-one Class D inductor of the present invention;

[0035] Fig.14 A schematic diagram of a U-CORE cold-pressed one-out-three-mold middle mold of a production process for an audio high-fidelity two-in-one Class D inductor of the present invention;

[0036] Fig.15 A schematic diagram of a U-CORE cold-pressed one-out-three-die-down punching process for producing a high-fidelity audio two-in-one Class D inductor according to the present invention;

[0037] Fig.16 This is a schematic diagram of the U-CORE cold pressing one-out-three mold lower two punches of the audio high-fidelity two-in-one Class D inductor production process of the present invention.

[0038] Among them, 1. the first inductor monomer; 2. the reserved connection of the electrode surface; 3. the electrode surface body; 4. the connecting colloid; 5. the second inductor monomer; 6. the Mylar; 7. the T-core body; 8. the U-core body; 9. the I-core body; 10. the slot body. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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.

[0040] Example:

[0041] Please refer to the attached Figure 1 -Attached Fig.16 The embodiment of the present invention provides a production process of an audio high-fidelity two-in-one Class D inductor, comprising the following steps:

[0042] S1. Wind the coil first. Before winding, strip the paint on one side of the wire in advance and reserve the electrode lead-out point, which is used to prepare for the subsequent circuit connection.

[0043] S2, preparing T-core, U-core and I-core in advance, wherein a cavity is provided inside the U-core so as to allow the inductor to have electrical characteristics;

[0044] S3, bending the flat wire coil, and then combining the bent coil with the T-core to form a preliminary assembly;

[0045] S4. First, put the U-core into the hot pressing mold, then fill the T-core into the mold cavity of the hot pressing mold, and finally put the I-core in, and then perform hot pressing. During the hot pressing process, the copper wire of the inductor monomer must be leaked;

[0046] S5. Spray a layer of insulating paint evenly on the surface of the inductor monomer, use laser paint stripping to peel out the size of the pad to be electroplated, and then use the electroplating process to form the electrode surface of the inductor. Then perform the glue dispensing operation to bond the two sensors together to complete the assembly work, and finally stick the Mylar.

[0047] In S1, the coil is wound with flat wire, with a total winding thickness of 2.45-2.5mm, a single layer thickness of 0.25, a single layer thickness tolerance of +0.5mm and -0.1mm, a width of 6.5±0.5mm, a length of the reserved electrode lead-out point of 8±0.5mm, and solder can enter the coil -0.5-1mm, and the reserved lead-out electrode lead-out point can be peeled on the front without soldering.

[0048] Specifically, the total winding thickness accurately controls the overall size of the coil to adapt to the space requirements of subsequent equipment or components, ensures reasonable electromagnetic coupling with other components, ensures stable operation of the electromagnetic system, and realizes functions such as voltage and current regulation and energy conversion;

[0049] The single layer thickness and tolerance are the basic units for constructing the overall thickness of the coil. Stable single layer thickness ensures the uniformity and consistency of the coil, which is conducive to forming a regular magnetic field distribution and improving the electromagnetic induction efficiency. The tolerance setting takes into account the fluctuation of the production process, maintains the stability of the coil quality and similar electromagnetic performance between different batches.

[0050] The width and tolerance accurately control the outer dimensions of the coil, affecting the winding density and number of turns, and thus affecting electromagnetic performance indicators such as inductance. The width variation within the tolerance range takes into account the actual production, ensuring the feasibility of the winding operation and the versatility of adapting to other components, ensuring a good electromagnetic coupling effect;

[0051] Reserved electrode lead-out point length and tolerance: Sufficient length is reserved to facilitate connection with external circuits to achieve power or signal transmission. Clear length and tolerance range avoids space occupation or unstable connection caused by too long or too short, and improves product versatility and operability;

[0052] The soldering range ensures reliable electrical connection when welding the electrode lead-out point and maintains the normal electromagnetic performance of the coil, avoiding problems such as too much solder entering the coil to damage the internal structure and affect the electromagnetic performance, or too little solder entering the coil to cause loose welding and cold solder joints.

[0053] The lead-out point of the reserved lead-out electrode is stripped on the front side without soldering, which simplifies the connection process, avoids excessive soldering affecting the appearance, prevents potential problems such as front short circuit, and realizes effective connection with the external circuit while keeping the front side of the lead-out point clean and electrically safe, which is convenient for subsequent installation, use and maintenance.

[0054] The cavity design of S2 and U-core adopts a teardrop-shaped cavity, which is used to ensure that the inductor monomer has sufficient powder. The powder includes iron powder, cobalt powder, nickel powder, silica powder and zinc stearate, among which the mass percentage of iron powder is 70%-80%, the mass percentage of cobalt powder is 5%-10%, the mass percentage of nickel powder is 3%-8%, and the mass percentage of silica powder and zinc stearate is 0.5%-2%.

[0055] Specifically, in terms of ensuring sufficient powder, the unique shape design of the teardrop-shaped cavity can make full use of the internal space. Compared with some conventional geometric shape cavities (such as square, round, etc.), it can accommodate more powder in a limited volume. Its shape characteristics enable the powder to flow more smoothly during the filling process and be evenly distributed in all corners of the cavity, thereby effectively ensuring that the inductor monomer can obtain sufficient magnetic powder and other powders, laying the foundation for the subsequent formation of a good magnetic circuit and the realization of the normal function of the inductor. Sufficient powder filling helps to form a complete and uniform magnetic circuit. When the inductor is working, the current passes through the coil to generate a magnetic field. The evenly distributed magnetic powder can better guide and concentrate the magnetic field under the accommodation and constraint of the teardrop-shaped cavity, making the magnetic field intensity distribution more uniform and stable, thereby improving the inductance performance of the inductor, such as more accurately regulating the current, more efficiently storing energy, etc. At the same time, it is also conducive to reducing the electromagnetic performance instability and inductance deviation that may occur due to insufficient powder causing weak or uneven local magnetic fields.

[0056] Due to the high iron content, the overall magnetic permeability of the magnetic powder is relatively high, which can effectively enhance the inductance of the inductor. In practical applications, the inductor can better regulate the current. For example, in the filter circuit, it can more effectively filter out the unnecessary clutter current and make the output current purer and more stable; in the energy storage circuit, it can also improve the energy storage efficiency and achieve more reliable energy conversion and storage functions.

[0057] In the application scenario of inductors, the high coercive force and residual magnetic properties of cobalt powder enable the inductor to maintain stable inductance performance in complex and changeable electromagnetic environments (such as external magnetic field interference, current fluctuations, etc.). For example, in some electronic devices close to other strong magnetic field sources, inductors made of magnetic powder containing cobalt powder can better resist the interference of external magnetic fields and ensure the stability of their own inductance, thereby ensuring the normal operation of the equipment and reducing signal distortion, circuit failure and other problems caused by inductance fluctuations;

[0058] After adding nickel powder to the inductor, due to the increase in magnetic permeability, the magnetic field conducts more smoothly inside the magnetic powder and between other components, which helps to optimize the overall electromagnetic induction process of the inductor. For example, in the application of transformer-type inductors, it can improve the efficiency of voltage conversion, making the conversion between input voltage and output voltage more accurate and effective, and at the same time reduce the energy loss in the electromagnetic conversion process, thereby improving energy utilization efficiency.

[0059] The dispersing effect of silicon dioxide powder ensures the uniform distribution of magnetic powder particles, so that when the magnetic powder forms a magnetic circuit, the magnetic field can be evenly transmitted between the particles, avoiding local magnetic field anomalies caused by particle agglomeration, which in turn affects the electromagnetic properties of the inductor. The lubricating effect of zinc stearate improves the quality and efficiency of magnetic powder molding, making the pressed magnetic powder products (such as the core part of the inductor formed in combination with U-core, etc.) more uniform in density and more compact in structure, thereby improving the overall stability and reliability of the inductor and extending its service life.

[0060] In S3, the bending operation includes one fold and two folds, and the bending angles of the one fold and the two folds are both 90°, and the bending tolerance is ±0.1°.

[0061] Specifically, the bending angle is fixed at 90°. In terms of assembly, the precise 90° bending ensures the closeness and accuracy of the fit with other components, reduces the assembly difficulties or excessive gaps caused by shape mismatch, thereby improving production efficiency and product quality. The bending tolerance is ±0.1°. In terms of production feasibility, it can also accommodate some differences in the characteristics of the material itself to a certain extent. Different batches of flat wires may have differences in flexibility, etc., which ensures the smooth progress of the production process and product quality;

[0062] The leaked copper wire in S4 is used as the connection point for electrode lead-out in the subsequent process. The hot pressing molding temperature is 150-300°C and the hot pressing time is 5-30 minutes.

[0063] Specifically, the leaking copper wire provides a convenient and stable connection path for the inductor to access the external circuit, ensuring efficient transmission of power between the inductor and the external circuit, reducing power loss, signal distortion and other problems. It is convenient to perform standardized connection operations during the production process, improve production efficiency and product operability, and ensure consistency and reliability when different inductors are connected to external circuits;

[0064] It makes the relevant materials reach a suitable softening state, facilitates good molding effect under pressure, ensures the close combination of the inductor components, and improves the stability and firmness of the overall structure. It helps to optimize the internal microstructure of the material, which in turn has a positive impact on the electromagnetic performance of the inductor, for example, it can make the performance indicators such as inductance more stable and accurate;

[0065] Sufficient hot pressing time can ensure that the material is fully deformed and fused in a softened state, further enhancing the tightness of the bonding between the various components of the inductor and improving the overall quality. Appropriate time settings can allow the molding process to be fully completed, avoiding problems such as loose bonding or incomplete molding due to too short a time, or excessive deformation of the material and impaired performance due to too long a time, thereby ensuring the performance and service life of the inductor.

[0066] In S5, a layer of insulating paint is sprayed to improve the rust resistance and voltage resistance level of the monomer. The plating solution includes copper sulfate plating solution with a concentration of 100-300g / L and a sulfuric acid concentration of 50-150g / L. The plating time is 10-30 minutes. The glue for dispensing includes epoxy glue with a glue dot diameter of 0.5-2mm and a dispensing amount of 5-20μL.

[0067] Specifically, spraying insulating paint improves the rust resistance and voltage resistance of the inductor monomer, prolongs its service life, and ensures its normal operation and safety in the circuit;

[0068] The electroplating uses a copper sulfate electroplating solution with a specific concentration and a suitable electroplating time, which can form a uniform and dense coating on the part to be electroplated, improve the conductivity and corrosion resistance of the electrode surface, and enhance the overall performance and life of the inductor.

[0069] Epoxy glue is used for dispensing, and the diameter and amount of glue dots are controlled to achieve good adhesion between inductor components, ensure the stability of the overall structure, and avoid problems such as component loosening, separation, and glue overflow.

[0070] An audio high-fidelity two-in-one Class D inductor comprises a first inductor monomer 1 and a T-core body 7, wherein an electrode surface reserved connection portion 2 is provided on the inner wall of the first inductor monomer 1, an electrode surface body 3 is provided on the outer wall of the first inductor monomer 1, an outer wall of the electrode surface body 3 is slidably connected to the opening of the electrode surface reserved connection portion 2, the electrode surface body 3 is L-shapedly attached to the lower outer wall of the first inductor monomer 1, a connecting colloid 4 is provided on the upper surface of the first inductor monomer 1, a second inductor monomer 5 is slidably connected to the upper surface of the first inductor monomer 1, and an outer wall of the connecting colloid 4 is provided on the second inductor monomer 5. In the middle of the inductor monomer 5 and the first inductor monomer 1, the connecting colloid 4 is used to adhere the second inductor monomer 5 and the first inductor monomer 1, and the rear outer walls of the second inductor monomer 5 and the first inductor monomer 1 are provided with Mylar 6; the upper surface of the T-core body 7 is fixedly connected with the U-core body 8, the outer wall of the U-core body 8 is provided with a wound electrode wire, the outer wall of the U-core body 8 is slidably connected with the I-core body 9, the interior of the I-core body 9 is provided with a groove body 10, and the outer wall of the U-core body 8 is slidably connected to the interior of the groove body 10;

[0071] Specifically, the flat wire coil is wound and bent by the T-core body 7 and the U-core body 8, and then the front end reserved lead-out electrode lead-out point of the second bend of the wound flat wire coil is folded to the lower corner of the T-core body 7, and then the U-core body 8 and the flat wire coil are driven by the T-core body 7 to insert into the I-core body 9 and the slot body 10, and then hot pressing and cold pressing are performed to obtain the first inductor monomer 1. The electrode surface reserved connection 2 and the electrode surface body 3 installed outside the first inductor monomer 1 are used to transmit current during use, and the colloid 4 is connected The first inductor monomer 1 and the second inductor monomer 5 can be bonded together for installation and combination. During use, the Mylar 6 can further increase the stability and adhesion strength between the first inductor monomer 1 and the second inductor monomer 5, and the Mylar 6 can be used for marking. During use, this process can produce an audio high-fidelity two-in-one inductor with high electrode surface flatness, low magnetic resistance, ultra-low copper loss, excellent frequency response characteristics, and low THD+N characteristics. This product can be widely used in smart cockpit car audio, commercial audio, and home surround sound systems, and can provide a higher quality audio experience.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for a high-fidelity audio 2-in-1 Class D inductor, characterized in that: The following steps are involved: S1. Wind the coil first. Before winding, strip the paint on one side of the wire in advance and reserve the electrode lead-out point, which is used to prepare for the subsequent circuit connection. S2, preparing T-core, U-core and I-core in advance, wherein a cavity is provided inside the U-core so as to allow the inductor to have electrical characteristics; S3, bending the flat wire coil, and then combining the bent coil with the T-core to form a preliminary assembly; S4. First, put the U-core into the hot pressing mold, then fill the T-core into the mold cavity of the hot pressing mold, and finally put the I-core in, and then perform hot pressing. During the hot pressing process, the copper wire of the inductor monomer must be leaked; S5. Spray a layer of insulating paint evenly on the surface of the inductor monomer, use laser paint stripping to peel out the size of the pad to be electroplated, and then use the electroplating process to form the electrode surface of the inductor, and then perform the glue dispensing operation, and then bond the two together to complete the assembly work, and finally stick the Mylar.

2. The production process of a high-fidelity audio 2-in-1 Class D inductor according to claim 1, characterized in that: In S1, the coil is wound with flat wire, wherein the total winding thickness is 2.45-2.5mm, the single layer thickness is 0.25, wherein the tolerance of the single layer thickness is +0.5mm and -0.1mm, the width is 6.5±0.5mm, the length of the reserved electrode lead-out point is 8±0.5mm, wherein the solder can enter the coil -0.5-1mm, and the reserved lead-out electrode lead-out point can be peeled on the front without soldering.

3. The production process of a high-fidelity audio 2-in-1 Class D inductor according to claim 1, characterized in that: In S2, the cavity design of the U-core adopts a teardrop-shaped cavity, and the teardrop-shaped cavity is used to ensure that the inductor monomer has sufficient powder. The powder includes iron powder, cobalt powder, nickel powder, silica powder and zinc stearate, wherein the mass percentage of iron powder is 70%-80%, the mass percentage of cobalt powder is 5%-10%, the mass percentage of nickel powder is 3%-8%, and the mass percentage of silica powder and zinc stearate is 0.5%-2%.

4. The production process of a high-fidelity audio 2-in-1 Class D inductor according to claim 1, characterized in that: In S3, the bending operation includes one fold and two folds, and the bending angles of the one fold and the two folds are both 90°, wherein the bending tolerance is ±0.1°.

5. The production process of a high-fidelity audio 2-in-1 Class D inductor according to claim 1, characterized in that: In S4, the leaked copper wire is used as a connection point for electrode lead-out in subsequent processes, the hot pressing molding temperature is 150-300° C., and the hot pressing time is 5-30 minutes.

6. The production process of a high-fidelity audio 2-in-1 Class D inductor according to claim 1, characterized in that: In S5, the spraying of a layer of insulating paint is used to improve the rust resistance and voltage resistance level of the monomer, the electroplating solution includes a copper sulfate electroplating solution with a concentration of 100-300g / L, a sulfuric acid concentration of 50-150g / L, and an electroplating time of 10-30 minutes. The glue for dispensing includes epoxy glue, the glue dot diameter is 0.5-2mm, and the dispensing amount is 5-20μL.

7. An audio high-fidelity two-in-one Class D inductor, applied to an audio high-fidelity two-in-one Class D inductor production process according to any one of claims 1-6, characterized in that: The invention comprises a first inductor monomer (1) and a T-core body (7), wherein the inner wall of the first inductor monomer (1) is provided with an electrode surface reserved connection point (2), the outer wall of the first inductor monomer (1) is provided with an electrode surface body (3), the outer wall of the electrode surface body (3) is slidably connected to the opening of the electrode surface reserved connection point (2), the electrode surface body (3) is L-shaped and attached to the lower outer wall of the first inductor monomer (1), the upper surface of the first inductor monomer (1) is provided with a connecting colloid (4), the upper surface of the first inductor monomer (1) is slidably connected to a second inductor monomer (5), the outer wall of the connecting colloid (4) is arranged in the middle of the second inductor monomer (5) and the first inductor monomer (1), the connecting colloid (4) is used for bonding the second inductor monomer (5) and the first inductor monomer (1), and the rear outer walls of the second inductor monomer (5) and the first inductor monomer (1) are provided with Mylar (6).

8. The audio high-fidelity two-in-one Class D inductor according to claim 7, characterized in that: The upper surface of the T-core body (7) is fixedly connected to a U-core body (8), the outer wall of the U-core body (8) is provided with a wound electrode wire, the outer wall of the U-core body (8) is slidably connected to an I-core body (9), a groove body (10) is provided inside the I-core body (9), and the outer wall of the U-core body (8) is slidably connected to the inside of the groove body (10).

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