A high-efficiency heat dissipation driver with neodymium iron boron high-frequency voice coil

Abstract

This utility model discloses a high-efficiency heat dissipation driver for neodymium iron boron (NdFeB) high-frequency voice coils, belonging to the technical field of electroacoustic conversion devices. The technical solution adopted by this utility model is a high-efficiency heat dissipation driver for NdFeB high-frequency voice coils, including a housing assembly and a driver assembly disposed within the housing assembly. The housing assembly includes an outer shell and an inner frame, with the inner frame fixed within the outer shell. The bottom of the outer shell has honeycomb-shaped heat dissipation holes, and the inner frame has a heat dissipation section. The heat dissipation section and the honeycomb-shaped heat dissipation holes cooperate to form a synergistic heat dissipation system. The honeycomb-shaped heat dissipation holes at the bottom of the outer shell and the heat dissipation section of the inner frame form a synergistic heat dissipation system. Combined with the airflow generated by the vibration of the voice cone, this accelerates the airflow through the heat dissipation holes, effectively improving heat dissipation efficiency, reducing the operating temperature of the NdFeB magnet and the voice coil assembly, thereby enhancing structural stability and extending the service life of the core components.

Description

Technical Field

[0001] This utility model belongs to the technical field of electroacoustic conversion devices, specifically relating to a high-efficiency heat dissipation driver with neodymium iron boron high-frequency voice coil. Background Technology

[0002] In audio equipment, precision control, and other fields, neodymium iron boron (NdFeB) high-frequency voice coil drivers are widely used due to their advantages such as fast response speed and high thrust. As the core component, the magnetic properties of the NdFeB magnet are significantly affected by temperature. When the operating temperature is too high, problems such as increased magnetic loss and magnetic performance decay can easily occur, directly affecting the driver's output accuracy and operational stability. Currently, the heat dissipation structure design of traditional NdFeB high-frequency voice coil drivers has significant limitations. Most drivers rely solely on simple ventilation holes on the housing for natural convection cooling, resulting in low heat dissipation efficiency. Under high-frequency operating conditions, the voice coil assembly generates a large amount of Joule heat due to rapid reciprocating motion, while the magnet assembly also releases heat due to eddy current effects. If this heat cannot be dissipated in time, it will cause a sharp rise in the internal temperature of the driver. Related data shows that when the temperature exceeds 80℃, the magnetic flux of the NdFeB magnet decreases by more than 10%, while the resistance of the voice coil increases linearly with temperature, further exacerbating heat loss and creating a vicious cycle of "heat accumulation - performance degradation." From a structural stability perspective, traditional inner frames often employ a modular assembly structure. The gaps between components not only hinder heat transfer but also cause loosening under high-frequency vibrations, leading to problems such as abnormal noise and amplitude deviation during driver operation. During the sliding process, the voice coil assembly, lacking precise guidance and buffering structures, is prone to friction and collision with the magnet assembly, increasing energy loss and shortening the driver's lifespan due to mechanical wear. Furthermore, traditional heat dissipation holes are mostly straight-hole designs, resulting in slow airflow and failing to meet the rapid heat dissipation requirements of high-frequency operation. Heat on the inner and outer sides of the voice coil assembly is difficult to expel through effective airflow channels, forming localized heat accumulation zones, further shortening the lifespan of core components. Therefore, improving the heat dissipation efficiency, enhancing structural stability, and extending the lifespan of neodymium iron boron high-frequency voice coil drivers has become a pressing technical challenge in the industry. Existing technologies urgently need improvement to address these issues. Utility Model Content

[0003] This invention provides a neodymium iron boron high-frequency voice coil high-efficiency heat dissipation driver to solve at least one of the above-mentioned technical problems.

[0004] The technical solution adopted in this utility model is as follows: A high-efficiency heat dissipation driver for neodymium iron boron high-frequency voice coil includes a housing assembly and a voice drive assembly disposed within the housing assembly. The housing assembly includes an outer shell and an inner frame. The inner frame is fixed within the outer shell. The bottom of the outer shell is provided with honeycomb-shaped heat dissipation holes. The inner frame is provided with a heat dissipation part. The heat dissipation part and the honeycomb-shaped heat dissipation holes cooperate with each other to form a synergistic heat dissipation system.

[0005] Furthermore, this application also proposes that the sound drive assembly has a voice coil assembly capable of reciprocating sliding, and a diaphragm is fixedly connected between the upper end of the voice coil assembly and the upper end of the inner frame. The diaphragm vibrates at the same frequency as the voice coil assembly to allow air to enter and exit the interior of the housing along the honeycomb-shaped heat dissipation holes.

[0006] Furthermore, this application also proposes that the inner frame includes a basin, a middle mounting boss, and a top mounting boss arranged sequentially from bottom to top. The top mounting boss is used to provide an installation position for the cone. The heat dissipation part includes a plurality of heat dissipation plates distributed circumferentially along the outer side of the inner frame, and a plurality of heat dissipation fins extending inward perpendicularly to the basin along the inner wall of the basin.

[0007] Furthermore, this application also proposes that the heat dissipation holes be arranged to decrease in size from the inside out and then increase in size to form a structure similar to a Venturi tube, so as to accelerate the airflow.

[0008] Furthermore, this application also proposes that the heat sink, basin, middle mounting boss, top mounting boss, and heat dissipation fins are integrally formed.

[0009] Furthermore, this application also proposes that the sound drive assembly includes a T-iron, the T-iron having a base and a central column, an annular magnet assembly being sleeved on the outer side of the central column, a sliding gap being provided between the annular magnet assembly and the central column, a voice coil assembly slidingly engaging with the sliding gap, a sealing element being provided at the upper end of the voice coil assembly, a plurality of spiral fins being spaced apart circumferentially on the inner wall of the voice coil assembly, a spiral heat dissipation groove being provided on the outer wall of the central column, an internal airflow channel being formed between the spiral heat dissipation groove and the inner wall of the voice coil assembly, and an air guide hole being provided at the bottom of the T-iron connecting the outside and the internal airflow channel.

[0010] Furthermore, this application also proposes that the annular magnet assembly includes an annular magnet and an annular clamping plate sequentially sleeved on the outer side of the central column from bottom to top. The inner wall of the annular clamping plate abuts against the outer side of the voice coil assembly. The inner wall of the annular clamping plate is provided with a plurality of grooves spaced apart, and an external airflow channel is formed between the grooves and the outer wall of the guide slide.

[0011] Furthermore, this application also proposes that the spiral heat dissipation groove is coated with graphene thermal conductive adhesive.

[0012] Furthermore, this application also proposes that the bottom of the inner frame is provided with a mounting base for fixing the T-iron, and a spring is fixedly connected between the central mounting boss and the central part of the voice coil assembly.

[0013] Furthermore, this application also proposes that the bottom of the voice coil assembly is provided with a guide portion that slides in conjunction with the sliding gap.

[0014] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows: 1. This solution utilizes a honeycomb-shaped perforation system combined with heat dissipation fins to create forced convection cooling. Existing internal frames are mostly single-support structures; this solution integrates a heat dissipation unit to achieve both structural support and thermal management. Traditional split-assembly is prone to vibration gaps; this solution improves structural stability through an integrated, fixed connection. It effectively reduces the operating temperature of the voice coil assembly and magnet, slowing down the decay of the magnetic properties of the NdFeB material. The collaborative cooling system utilizes vibration energy to drive airflow, improving heat dissipation efficiency for the same power consumption. The integrated structural design reduces mechanical losses caused by vibration, extending the driver's lifespan.

[0015] 2. By actively driving airflow through cone vibration and utilizing the multi-channel characteristics of the honeycomb heat dissipation holes to form directional airflow circulation, the air exchange rate per unit time is significantly improved. The synchronized movement of the cone and voice coil ensures that airflow pulsation and heat generation are synchronized, avoiding localized high-temperature zones caused by heat dissipation delays in traditional solutions. This achieves highly efficient synergy between the voice coil assembly and the heat dissipation structure. Forced convection using the airflow generated by cone vibration removes heat, solving the problem of insufficient heat dissipation efficiency in traditional natural convection. The multi-channel design of the honeycomb heat dissipation holes reduces airflow resistance, and combined with the directional airflow driving capability of the cone, effectively improves the heat exchange rate between the inside of the housing and the outside environment, preventing the magnetic performance of the neodymium iron boron magnet from decaying due to temperature rise, while also reducing the negative impact of voice coil resistance increasing with temperature.

[0016] 3. Through the combined design of the basin, heat sink, and heat dissipation fins, airflow is directed to flow both inside and outside the structure under vibration. A stepped installation structure improves component positioning accuracy and prevents component misalignment caused by high-frequency vibration. This solves the problems of low heat dissipation efficiency and insufficient structural stability of traditional internal basin frames. The interconnected internal and external heat dissipation structure enables rapid heat removal, while the integrated molding process enhances the connection strength between components, reducing energy loss due to vibration and noise. The coordinated design of the heat dissipation fins and heat sink ensures airflow covers the voice coil assembly and magnet area, effectively preventing magnetic performance degradation caused by localized overheating.

[0017] 4. This solution actively accelerates airflow through a Venturi tube structure, significantly increasing the air exchange rate per unit time. Existing straight holes are prone to turbulence due to a lack of airflow guidance, while this solution utilizes the laminar flow effect generated by cross-sectional changes to reduce energy loss. This application solves the problem of low heat dissipation efficiency caused by insufficient airflow velocity in traditional heat dissipation holes. By accelerating airflow circulation, it effectively reduces the operating temperature of the voice coil assembly and magnet assembly, suppresses the magnetic performance decay of the NdFeB magnet caused by temperature rise, and simultaneously reduces energy loss due to airflow resistance, extending the service life of the driver under high-frequency conditions.

[0018] 5. This solution eliminates the connection interface through one-piece molding, allowing heat to be conducted rapidly along the continuous material, while avoiding component displacement caused by vibration, thus improving heat dissipation efficiency and structural stability. This application solves the technical problems of high thermal resistance and easy loosening of split-type internal racks, achieving optimized heat dissipation path and improved structural strength, ensuring that the driver maintains stable heat dissipation performance and mechanical reliability under high-frequency operating conditions.

[0019] 6. By combining spiral fins with spiral heat dissipation grooves, the mechanical energy generated by the movement of the voice coil assembly drives forced convection of airflow, significantly improving heat dissipation efficiency. This application solves the problem of heat accumulation between the voice coil assembly and the magnet assembly leading to magnetic performance attenuation. By using mechanical motion energy to drive airflow circulation, efficient heat dissipation is achieved without the need for additional heat dissipation devices, while reducing frictional heat accumulation between the voice coil assembly and the center post, thus improving the stability of the driver operation.

[0020] 7. Graphene thermally conductive adhesive is applied inside the spiral heat sink to enhance the thermal conductivity between the center column and the voice coil assembly. When the voice coil assembly generates heat during operation, the heat can be quickly transferred to the center column through the graphene thermally conductive adhesive and then dissipated through the center column. This effectively reduces the contact thermal resistance between the voice coil assembly and the magnetic circuit system, keeping the operating temperature below the Curie temperature of the neodymium iron boron magnet and preventing magnetic flux attenuation.

[0021] 8. By creating grooves on the inner wall of the annular clamp, which cooperate with the outer wall of the guide slide to form a directional airflow channel, the airflow guidance is enhanced, while avoiding increased frictional resistance due to excessive contact area. This solves the problem of localized temperature rise caused by low heat dissipation efficiency in the contact area between the annular clamp and the voice coil assembly in traditional drivers. The directional heat dissipation through the external airflow channel reduces heat conduction losses between the voice coil assembly and the magnet assembly, while also reducing mechanical wear between the annular clamp and the guide slide under high-frequency vibration, thus extending the driver's service life. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the housing assembly of this utility model; Figure 3 This is one of the overall structural schematic diagrams of this utility model; Figure 4 This is the second schematic diagram of the overall structure of this utility model; Figure 5 This is a schematic diagram of the T-iron structure in this utility model; Figure 6 This is a schematic diagram of the structure of the annular magnet assembly in this utility model; Figure 7 This is a schematic diagram of the voice coil assembly in this utility model.

[0023] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0024] In the attached diagram: 1. Outer shell; 11. Ventilation holes; 2. Inner frame; 201. Cone; 202. Central mounting boss; 203. Top mounting boss; 204. Heat dissipation fins; 21. Cone; 22. Heat sink; 3. T-iron; 31. Spiral heat dissipation groove; 32. Air vent; 4. Annular magnet; 5. Annular clamp; 51. Groove; 6. Voice coil assembly; 61. Spiral fins; 62. Guide slide; 7. Spring; 8. Seal. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0027] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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. Therefore, they should not be construed as limitations on this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a communication 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 utility model according to the specific circumstances.

[0029] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" 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 this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Reference Figures 1 to 7 A high-efficiency heat dissipation driver for neodymium iron boron high-frequency voice coil includes a housing assembly and a voice drive assembly disposed within the housing assembly. The housing assembly includes an outer shell 1 and an inner frame 2. The inner frame 2 is fixed inside the outer shell 1. The bottom of the outer shell 1 is provided with honeycomb-shaped heat dissipation holes 11. The inner frame 2 is provided with a heat dissipation part. The heat dissipation part and the honeycomb-shaped heat dissipation holes 11 cooperate with each other to form a synergistic heat dissipation system.

[0031] The outer casing 1 refers to the metal or composite material housing that encloses the audio drive assembly and other internal components. Specifically, it can be made of die-cast aluminum alloy to achieve lightweight and high strength. The honeycomb-shaped heat dissipation holes 11 refer to a hexagonal array of through-holes, such as a group of holes with a diameter of 1.5-2.5 mm, which promotes air convection by increasing the heat dissipation surface area. The inner frame 2 refers to the support frame fixed inside the outer casing 1, which can be made of copper-aluminum alloy with a thermal conductivity higher than 200 W / (m·K) to support the audio drive assembly and conduct heat. The heat dissipation section refers to the heat exchange structure located on the surface of the inner frame 2, such as a fin array formed by milling, used to increase the contact area with air. The synergistic heat dissipation system refers to the three-dimensional heat dissipation channel formed by the heat dissipation holes 11 and the heat dissipation section, which achieves rapid heat dissipation through forced convection of air between the channels and fins.

[0032] The honeycomb-shaped heat dissipation holes 11 at the bottom of the outer casing 1 create a directional airflow when the cone 21 vibrates, and the heat dissipation fins 204 of the inner frame 2 accelerate heat dissipation by increasing the heat exchange area. When the voice coil assembly 6 is working, the air pressure change generated by the reciprocating motion of the cone 21 drives external air into the casing through the heat dissipation holes 11. As the airflow passes through the heat dissipation section of the inner frame 2, it carries away the accumulated heat, forming a continuously circulating heat dissipation path. The fixed connection between the inner frame 2 and the outer casing 1 avoids vibration and abnormal noise from the separate structure, while ensuring that heat is efficiently conducted to the outer casing 1 through the metal contact surface.

[0033] This solution utilizes a honeycomb-shaped perforation system in conjunction with heat sink fins 204 to create forced convection cooling. While existing inner frame 2 structures are mostly single-support structures, this solution integrates a heat sink to achieve both structural support and thermal management. Traditional modular assembly is prone to vibration gaps; this solution improves structural stability through an integrated, fixed connection. It effectively reduces the operating temperature of the voice coil assembly 6 and the magnet, slowing down the decay of the NdFeB material's magnetic properties. The collaborative cooling system utilizes vibration energy to drive airflow, improving heat dissipation efficiency for the same power consumption. The integrated structural design reduces mechanical losses caused by vibration, extending the driver's lifespan.

[0034] As a specific implementation of the audio drive component, refer to Figures 1-7 The sound drive assembly has a voice coil assembly 6 that can slide back and forth. A cone 21 is fixedly connected between the upper end of the voice coil assembly 6 and the upper end of the inner frame 2. The cone 21 vibrates in sync with the voice coil assembly 6 to allow air to enter and exit the interior of the outer casing 1 through the honeycomb-shaped heat dissipation holes 11.

[0035] The voice coil assembly 6 is a driving component made of conductive coil windings, specifically made of copper enameled wire wound on a lightweight frame, which drives reciprocating motion by generating electromagnetic force through changes in current. The cone 21 is an elastic diaphragm structure used to convert mechanical vibrations into sound waves, specifically made of polyester fiber or composite paper-based material, and is fixed at the edge between the inner frame 2 and the voice coil assembly 6 to form a vibration transmission interface.

[0036] When the voice coil assembly 6 reciprocates at high frequency under electromagnetic force, the cone 21 fixed at its upper end vibrates at the same frequency. The periodic deformation of the cone 21 causes fluctuations in the air pressure inside the housing 1, forming a directional airflow. This airflow exchanges with the outside air through the honeycomb-shaped heat dissipation holes 11. When the cone 21 moves downward, cold outside air is drawn into the housing, and when the cone 21 moves upward, hot inside air is expelled. The vibration frequency of the cone 21 is consistent with the movement frequency of the voice coil assembly 6, so that the airflow exchange rate matches the heat generation rate, preventing heat from accumulating inside the housing.

[0037] Traditional drivers rely solely on natural convection for heat dissipation through straight orifices. Airflow velocity is limited by temperature difference and orifice size, making them unsuitable for handling the instantaneous heat load under high-frequency operation. This solution actively drives airflow through the vibration of the cone 21, utilizing the multi-channel characteristics of the honeycomb-shaped heat dissipation holes 11 to form a directional airflow circulation, significantly increasing the air exchange rate per unit time. The synchronized movement of the cone 21 and the voice coil ensures that airflow pulsation and heat generation are synchronized, avoiding localized high-temperature zones caused by delayed heat dissipation in traditional solutions. This achieves efficient synergy between the voice coil assembly 6 and the heat dissipation structure. The forced convection generated by the vibration of the cone 21 removes heat, solving the problem of insufficient efficiency in traditional natural convection cooling. The multi-channel design of the honeycomb-shaped heat dissipation holes 11 reduces airflow resistance. Combined with the directional airflow driving capability of the cone 21, this effectively improves the heat exchange rate between the inside of the housing and the outside environment, preventing the NdFeB magnet from losing magnetic performance due to temperature rise, while also reducing the negative impact of increased voice coil resistance with temperature.

[0038] As a preferred embodiment of the heat dissipation section in this application, refer to... Figures 1-4 The inner frame 2 includes a basin 201 arranged sequentially from bottom to top, a middle mounting boss 202, and a top mounting boss 203. The top mounting boss 203 is used to provide an installation position for the cone 21. The heat dissipation part includes a plurality of heat dissipation plates 22 distributed circumferentially along the outer side of the inner frame 2, and a plurality of heat dissipation fins 204 extending inward perpendicularly to the basin 201 and spaced circumferentially along the inner wall of the basin 201.

[0039] The basin 201, the middle mounting boss 202, and the top mounting boss 203 of the heat sink provide a stable mounting structure for each component. Heat sinks 22 are spaced circumferentially along the outer side of the inner basin 2, increasing the contact area between the inner basin 2 and the air inside the outer casing 1, which facilitates heat transfer from the inner basin 2 to the air. The heat dissipation fins 204 on the inner wall of the basin 201 further increase the contact area between the inner basin 2 and the air surrounding the audio drive assembly, enabling rapid absorption of heat generated by the audio drive assembly and transfer to the inner basin 2, which is then dissipated through the heat sink 22.

[0040] This design, through the combined design of the basin 201, heat sink 22, and heat dissipation fins 204, enables airflow to form a directional flow penetrating both the inside and outside under vibration. Simultaneously, a stepped installation structure improves component positioning accuracy, preventing component misalignment caused by high-frequency vibration. This solves the problems of low heat dissipation efficiency and insufficient structural stability of traditional inner basin frames. The interconnected internal and external heat dissipation structure achieves rapid heat removal, while the integrated molding process enhances the connection strength between components, reducing energy loss due to vibration and abnormal noise. The coordinated design of the heat dissipation fins 204 and heat sink 22 ensures that airflow covers the voice coil assembly 6 and the magnet area, effectively preventing magnetic performance degradation caused by excessively high local temperatures.

[0041] In a preferred embodiment of the heat dissipation hole 11, the heat dissipation hole 11 is arranged to decrease in size from the inside out and then increase in size, forming a structure similar to a Venturi tube to accelerate the airflow.

[0042] According to the Venturi effect, when fluid flows through a pipe that first contracts and then expands, the flow velocity increases and the pressure decreases in the contraction section, thus creating a pressure difference between the inlet and outlet, prompting the fluid to flow faster. The heat dissipation hole 11 adopts a structure similar to a Venturi tube. When air flows through the heat dissipation hole 11, the flow velocity increases in the contraction section, forming a low-pressure zone. This makes it easier for hot air inside the outer casing 1 to be "drawn" into the heat dissipation hole 11 and discharged, while external cold air can also enter the outer casing 1 more quickly.

[0043] Traditional straight-hole heat dissipation structures rely solely on natural convection, while this solution actively accelerates airflow through a venturi tube structure, significantly increasing the air exchange rate per unit time. Existing straight holes are prone to turbulence due to the lack of airflow guidance, while this solution utilizes the laminar flow effect generated by cross-sectional changes to reduce energy loss. This application solves the problem of low heat dissipation efficiency caused by insufficient airflow velocity in traditional heat dissipation holes 11. By accelerating airflow circulation, it effectively reduces the operating temperature of the voice coil assembly 6 and the magnet assembly, suppresses the magnetic performance decay of the neodymium iron boron magnet caused by temperature rise, and simultaneously reduces energy loss due to airflow resistance, extending the service life of the driver under high-frequency conditions.

[0044] As a preferred example of the above-described implementation method, refer to Figure 2 The heat sink 22, the basin 201, the middle mounting boss 202, the top mounting boss 203, and the heat dissipation fins 204 are integrally formed.

[0045] The inner frame 2 integrates the heat sink 22, the basin 201, the central mounting boss 202, the top mounting boss 203, and the heat dissipation fins 204 into a single structure using a one-piece molding process. The heat sink 22 and the heat dissipation fins 204 form a dual-path heat dissipation network. The basin 201 acts as a heat conduction substrate, uniformly transferring the heat generated by the voice coil assembly 6 to the heat sink 22. The central mounting boss 202 and the top mounting boss 203 eliminate assembly gaps between the separate structures through continuous material. The heat dissipation fins 204 create turbulence on the inner wall of the basin 201, promoting heat exchange between the air and the basin 201. When the voice coil assembly 6 vibrates at high frequencies, the integrated structure avoids local stress concentration through material continuity. At the same time, the synergistic effect of the heat sink 22 and the heat dissipation fins 204 accelerates the diffusion of heat towards the honeycomb-shaped heat dissipation holes 11.

[0046] Traditional split-type inner basin 2 uses bolts or welding to connect components such as the heat sink 22 and mounting bosses, resulting in thermal resistance at the joints and a tendency to loosen due to vibration. This solution eliminates the connection interface through one-piece molding, allowing heat to be quickly conducted along the continuous material, while avoiding component displacement caused by vibration, thus improving heat dissipation efficiency and structural stability. This application solves the technical problems of high thermal resistance and easy loosening in split-type inner basin 2, achieving optimized heat dissipation path and improved structural strength, ensuring that the driver maintains stable heat dissipation performance and mechanical reliability under high-frequency operating conditions.

[0047] As a preferred embodiment of the audio drive component, refer to Figure 1 , Figures 5-7 The sound drive assembly includes a T-iron 3, which has a base and a central column. A ring magnet assembly is sleeved on the outside of the central column. There is a sliding gap between the ring magnet assembly and the central column. The voice coil assembly 6 slides with the sliding gap. A sealing element 8 is provided at the upper end of the voice coil assembly 6. Several spiral fins 61 are spaced around the inner wall of the voice coil assembly 6. A spiral heat dissipation groove 31 is provided on the outer wall of the central column. An internal airflow channel is formed between the spiral heat dissipation groove 31 and the inner wall of the voice coil assembly 6. An air guide hole 32 is provided at the bottom of the T-iron 3, which connects the outside and the internal airflow channel.

[0048] T-iron 3 is a magnetically conductive structure with a base and a central column. It can be made of a soft magnetic material with high permeability. The annular magnet assembly refers to a permanent magnet assembly fitted onto the outside of the central column. It can be a combination of neodymium iron boron magnets and a magnetically conductive clamping plate, used to generate the magnetic field that drives the voice coil assembly 6. The spiral fins 61 are sheet-like structures spaced circumferentially along the inner wall of the voice coil assembly 6. They can be formed by stamping thin metal sheets and are used to agitate airflow to enhance heat dissipation when the voice coil assembly 6 moves. The spiral heat dissipation grooves 31 are grooves extending spirally along the outer wall of the central column. They can be formed by CNC machining and are used to cooperate with the spiral fins 61 to form a directional airflow channel. The air guide hole 32 is a through hole penetrating the bottom of T-iron 3. It can be machined using a drilling process and is used to introduce external cold air into the internal airflow channel.

[0049] When the voice coil assembly 6 reciprocates along the sliding gap under the influence of the magnetic field, with the seal 8 in place, the relative displacement between the center post and the voice coil assembly 6 generates a pumping effect, forcing air to flow directionally along the spiral heat dissipation groove 31. External cold air enters the internal airflow channel through the air guide hole 32, flows through the gap between the spiral heat dissipation groove 31 and the inner wall of the voice coil assembly 6, and carries the heat from the surface of the voice coil assembly 6 and the center post out of the driver. The seal 8 prevents airflow from leaking from the top of the voice coil assembly 6, ensuring the integrity of the airflow channel.

[0050] Traditional drivers lack a directional airflow channel between the voice coil assembly 6 and the magnet assembly, relying solely on natural convection for heat dissipation, leading to heat accumulation within the sliding gap. This solution utilizes the cooperation of the spiral fins 61 and the spiral heat dissipation grooves 31 to drive forced airflow through the mechanical energy generated by the movement of the voice coil assembly 6, significantly improving heat dissipation efficiency. This application solves the problem of heat accumulation between the voice coil assembly 6 and the magnet assembly causing magnetic performance attenuation. By using mechanical motion energy to drive airflow circulation, it achieves efficient heat dissipation without the need for additional heat dissipation devices, while simultaneously reducing frictional heat accumulation between the voice coil assembly 6 and the center post, thus improving the driver's operational stability.

[0051] Furthermore, the spiral heat sink 31 is coated with graphene thermally conductive adhesive. Graphene has an extremely high thermal conductivity, and the graphene thermally conductive adhesive coated inside the spiral heat sink 31 enhances the thermal conductivity between the center column and the voice coil assembly 6. When the voice coil assembly 6 generates heat during operation, the heat can be quickly transferred to the center column through the graphene thermally conductive adhesive, and then dissipated through the center column. This effectively reduces the contact thermal resistance between the voice coil assembly 6 and the magnetic circuit system, keeping the operating temperature below the Curie temperature of the neodymium iron boron magnet and preventing magnetic flux attenuation. At the same time, by enhancing the axial thermal conductivity of the spiral channel, the heat generated by the voice coil assembly 6 is quickly dispersed to the entire heat dissipation surface, eliminating the impact of local hot spots on the magnet performance and extending the driver's service life.

[0052] Furthermore, the bottom of the voice coil assembly 6 is provided with a guide portion 62 that slides in conjunction with the sliding gap. The guide portion 62, in conjunction with the sliding gap, provides guidance for the reciprocating sliding of the voice coil assembly 6, making its movement smoother and more stable, and reducing friction and wobble during movement. This solution, through the rigid contact between the guide portion 62 and the sliding gap, forms a dual positioning mechanism, adding rigid guidance to the flexible support of the spider 7 and the cone 21, significantly suppressing radial vibration. This application effectively solves the problem of radial offset of the voice coil assembly 6 during high-frequency movement, reduces mechanical wear and energy loss caused by friction and collision, and optimizes the airflow path through the cooperation of the guide portion 62 and the sliding gap, improving heat dissipation efficiency and structural stability, and extending the service life of the driver.

[0053] As a preferred embodiment of the ring magnet assembly, refer to Figure 1 , Figure 5 and Figure 6The annular magnet assembly includes an annular magnet 4 and an annular clamping plate 5, which are sequentially fitted onto the outer side of the central column from bottom to top. The inner wall of the annular clamping plate 5 abuts against the outer side of the voice coil assembly 6. Several grooves 51 are spaced apart on the inner wall of the annular clamping plate 5, forming an external airflow channel between the grooves 51 and the outer wall of the guide slide 62. During the reciprocating motion of the voice coil assembly 6, the grooves 51 on the inner wall of the guide slide 62 and the annular clamping plate 5 form a continuous airflow channel. When the voice coil assembly 6 vibrates, air circulates between the driver's interior and the external environment through the external airflow channel, thereby quickly dissipating the heat generated on the outer side of the voice coil assembly 6. The spaced distribution of the grooves 51 prevents the formation of a sealed space between the annular clamping plate 5 and the guide slide 62, preventing localized heat accumulation.

[0054] This design creates a groove 51 on the inner wall of the annular clamping plate 5, which, in conjunction with the outer wall of the guide slide 62, forms a directional airflow channel. This enhances the guidance of airflow and avoids increased frictional resistance due to excessive contact area. It solves the problem of localized temperature rise in traditional drivers caused by low heat dissipation efficiency in the contact area between the annular clamping plate 5 and the voice coil assembly 6. The directional heat dissipation through the external airflow channel reduces heat conduction losses between the voice coil assembly 6 and the magnet assembly, while also reducing mechanical wear between the annular clamping plate 5 and the guide slide 62 under high-frequency vibration, thus extending the driver's service life.

[0055] The bottom of the inner frame 2 is provided with a mounting base for fixing the T-iron 3, and the middle mounting boss 202 is fixedly connected to the middle of the voice coil assembly 6 with a spring 7.

[0056] The mounting base is integrally molded to the bottom of the inner frame 2, forming a stable mechanical connection interface and ensuring no relative displacement between the T-iron 3 and the inner frame 2. The spring 7 is rigidly connected to the middle of the voice coil assembly 6 via a ring-shaped corrugated structure. During the reciprocating motion of the voice coil assembly 6, the corrugated deformation releases vibration stress, preventing vibration energy from being transferred to the outer casing 1 through the inner frame 2. The mounting base and spring 7 work together to maintain precise movement of the voice coil assembly 6 within a fixed area, while reducing structural resonance caused by vibration. This solution absorbs vibration energy through the elastic deformation of the spring 7, while the integrated design of the mounting base enhances structural rigidity, making the heat transfer path from the inner frame 2 to the heat sink fins 204 more stable. This prevents heat dissipation channel obstruction due to vibration, solving the problems of reduced heat dissipation efficiency and vibration noise caused by the split mounting structure of traditional drivers. Through the synergistic effect of the spring 7 and the mounting base, the motion stability of the voice coil assembly 6 is improved, heat accumulation at critical connection points is reduced, and the driver's service life is extended.

[0057] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0058] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0059] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A neodymium iron boron high-frequency voice coil high-efficiency heat dissipation driver, characterized in that, The device includes a housing assembly and a sound drive assembly disposed within the housing assembly. The housing assembly includes an outer shell (1) and an inner frame (2). The inner frame (2) is fixed inside the outer shell (1). The bottom of the outer shell (1) is provided with honeycomb-shaped heat dissipation holes (11). The inner frame (2) is provided with heat dissipation parts. The heat dissipation parts and the honeycomb-shaped heat dissipation holes (11) cooperate with each other to form a synergistic heat dissipation system.

2. The Nd-Fe-B high-frequency voice coil high-efficiency heat dissipation driver according to claim 1, characterized in that, The sound drive assembly has a voice coil assembly (6) that can slide back and forth. A cone (21) is fixedly connected between the upper end of the voice coil assembly (6) and the upper end of the inner frame (2). The cone (21) vibrates in sync with the voice coil assembly (6) so that air enters and exits the interior of the outer shell (1) through the honeycomb-shaped heat dissipation holes (11).

3. The Nd-Fe-B high-frequency voice coil high-efficiency heat dissipation driver according to claim 2, characterized in that, The inner frame (2) includes a basin (201), a middle mounting boss (202), and a top mounting boss (203) arranged sequentially from bottom to top. The top mounting boss (203) is used to provide an installation position for the cone (21). The heat dissipation part includes a number of heat dissipation plates (22) distributed circumferentially along the outer side of the inner frame (2), and a number of heat dissipation fins (204) extending inward perpendicular to the basin (201) along the inner wall of the basin (201) at intervals circumferentially.

4. The Nd-Fe-B high-frequency voice coil high-efficiency heat dissipation driver according to claim 2, characterized in that, The heat dissipation holes (11) are arranged from the inside out, first decreasing and then increasing to form a structure similar to a Venturi tube, so as to accelerate the air flow rate.

5. The Nd-Fe-B high-frequency voice coil high-efficiency heat dissipation driver according to claim 3, characterized in that, The heat sink (22), basin (201), middle mounting boss (202), top mounting boss (203), and heat dissipation fins (204) are integrally formed.

6. The Nd-Fe-B high-frequency voice coil high-efficiency heat dissipation driver according to claim 3, characterized in that, The sound drive assembly includes a T-iron (3), which has a base and a central column. An annular magnet assembly is sleeved on the outside of the central column. There is a sliding gap between the annular magnet assembly and the central column. The voice coil assembly (6) slides with the sliding gap. A sealing element (8) is provided at the upper end of the voice coil assembly (6). Several spiral fins (61) are spaced apart circumferentially on the inner wall of the voice coil assembly (6). A spiral heat dissipation groove (31) is provided on the outer wall of the central column. An internal airflow channel is formed between the spiral heat dissipation groove (31) and the inner wall of the voice coil assembly (6). An air guide hole (32) is provided at the bottom of the T-iron (3) that connects the outside and the internal airflow channel.

7. The Nd-Fe-B high-frequency voice coil high-efficiency heat dissipation driver according to claim 6, characterized in that, The annular magnet assembly includes an annular magnet (4) and an annular clamp (5) sequentially sleeved on the outside of the central column from bottom to top. The inner wall of the annular clamp (5) abuts against the outer side of the voice coil assembly (6). The inner wall of the annular clamp (5) is provided with a number of grooves (51) spaced apart. An external airflow channel is formed between the grooves (51) and the outer wall of the guide slide (62).

8. The Nd-Fe-B high-frequency voice coil high-efficiency heat dissipation driver according to claim 6, characterized in that, The spiral heat dissipation groove (31) is coated with graphene thermal conductive adhesive.

9. The Nd-Fe-B high-frequency voice coil high-efficiency heat dissipation driver according to claim 5, characterized in that, The bottom of the inner frame (2) is provided with a mounting base for fixing the T-iron (3), and a spring (7) is fixedly connected between the middle mounting boss (202) and the middle of the voice coil assembly (6).

10. A high-efficiency heat dissipation driver with neodymium iron boron high-frequency voice coil according to claim 2, characterized in that, The bottom of the voice coil assembly (6) is provided with a guide part (62) that slides with the sliding gap.

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