A loudspeaker coil arrangement

Abstract

The application relates to a loudspeaker coil device and relates to the technical field of coils, which comprises a wire body, an inner core assembly, an outer layer assembly and a connecting assembly. The application can solve the problem that traditional enameled wires are prone to breakage by arranging the inner core assembly, the elasticity of the aluminum core body is utilized to adapt to the back-and-forth movement of a loudspeaker diaphragm, five carbon fiber filaments are evenly attached to the outer side of the aluminum core body through a first adhesive layer, and then a stable whole is formed after synchronous spiral twisting, so that the effect of uniformly dispersing stress is achieved, and the situation of local stress concentration does not occur, and the fatigue resistance is fundamentally improved. In order to make the inner core assembly and the outer layer assembly firmly connected, honeycomb holes are arranged on the outer surface of the nickel-plated transition layer, a second adhesive layer is matched to increase the contact area, the situation that peeling occurs between the layers due to long-term vibration is avoided, and finally, the silver particles filled in the copper sheet can ensure stable conduction.

Description

Technical Field

[0001] This application relates to the field of coil technology, and in particular to a loudspeaker coil device. Background Technology

[0002] The speaker contains a magnet inside, and a coil is installed in its magnetic circuit. When the coil is energized, it generates an electromagnetic field. The two magnetic fields interact with each other, causing the diaphragm system to work and produce sound.

[0003] In the manufacturing process of loudspeakers, the quality of the coil is one of the important factors affecting its service life. Existing small audio equipment, loudspeakers, and other devices all use enameled wire as the main material for loudspeaker coils. However, because enameled wire is thin and does not have good elasticity, it cannot effectively meet the working strength of the diaphragm system in the loudspeaker for a long time, and thus is prone to fatigue breakage. In order to solve the above problems, a loudspeaker coil device is proposed. Utility Model Content

[0004] The purpose of this application is to provide a loudspeaker coil device that improves and optimizes the structure of the wire, thereby solving the problems mentioned in the background art.

[0005] This application provides a speaker coil device with the following technical solution: A speaker coil device includes a wire body, an inner core assembly, an outer layer assembly, and a connecting assembly. The wire body is formed by spirally winding the inner core assembly and the outer layer assembly together through the connecting assembly. The inner core assembly includes an aluminum core body and carbon fiber filaments. The outer layer assembly includes a copper sheet, a graphene thermally conductive layer, and a protective layer. The interior of the copper sheet is filled with uniformly distributed silver particles. The graphene thermally conductive layer covers the outside of the copper sheet, and the protective layer covers the outside of the graphene thermally conductive layer. The connecting assembly includes a first adhesive layer, a second adhesive layer, and a nickel-plated transition layer.

[0006] By adopting the above technical solution, the wire body, which is composed of inner core components, outer layer components and connecting components, abandons the traditional single enameled wire structure. The aluminum core body in the inner core component has good elasticity and can adapt to the repeated movement of the diaphragm system. The carbon fiber filaments can enhance the overall structural strength. The copper sheet in the outer layer component, together with the silver particles filled inside, can ensure stable conductivity. The graphene thermal conductive layer and the protective layer respectively realize heat dissipation and protection functions. All components are tightly connected through the connecting components, which solves the problem of fatigue breakage caused by poor elasticity and insufficient strength of traditional enameled wires from the structural level.

[0007] Preferably, the number of carbon fiber filaments is five, the aluminum core body is located inside the five carbon fiber filaments, the first adhesive layer is coated on the outer surface of the aluminum core body, and the aluminum core body, the first adhesive layer and the five carbon fiber filaments are synchronously spirally twisted together to form a whole.

[0008] By adopting the above technical solution, five carbon fiber filaments are evenly wrapped around the outside of the aluminum core body, which can make the stress on the inner core component more uniform and avoid structural damage caused by local stress concentration. The first adhesive layer is coated on the outer surface of the aluminum core body, which can achieve a tight fit between the aluminum core body and the carbon fiber filaments. After synchronous spiral twisting, the two can form a stable overall structure, which not only retains the elasticity of the aluminum core body to adapt to the diaphragm movement, but also improves the fatigue resistance of the inner core component by taking advantage of the high strength characteristics of the carbon fiber filaments, further reducing the risk of wire breakage.

[0009] Preferably, the first adhesive layer is an epoxy adhesive layer, the second adhesive layer is a modified acrylic adhesive layer, and the second adhesive layer is coated on the outer surface of the five carbon fiber filaments.

[0010] By adopting the above technical solution, the first adhesive layer is made of epoxy adhesive, which has excellent bonding strength and aging resistance, and can ensure that the aluminum core body and carbon fiber filament remain firmly bonded under long-term vibration environment. The second adhesive layer is made of modified acrylic adhesive and coated on the outer surface of carbon fiber filament. This material has good compatibility with carbon fiber filament, which can realize the tight connection between the inner core component and the outer layer component, avoid coil structure failure caused by interlayer separation, and provide a guarantee for the overall structural stability.

[0011] Preferably, the graphene thermal conductive layer has uniformly distributed heat dissipation holes inside, and the direction of the heat dissipation holes is consistent with the axial direction of the aluminum core body.

[0012] By adopting the above technical solution, the graphene thermal conductive layer itself has excellent thermal conductivity. When it is wrapped on the outside of the copper sheet, it can quickly absorb the heat generated when the coil is working. The through-type heat dissipation holes opened along the axial direction of the aluminum core body can form an axial air convection channel, so that the heat absorbed by the graphene thermal conductive layer can be quickly discharged, avoiding the accumulation of heat inside the coil and the accelerated aging of the components, making it more practical.

[0013] Preferably, the protective layer is a polyimide film, which is bonded and fixed to the outside of the graphene thermally conductive layer by hot pressing.

[0014] By adopting the above technical solution, the polyimide film, as a protective layer, has excellent insulation performance, high temperature resistance, and corrosion resistance. It can effectively isolate external dust, moisture, and other impurities from eroding the graphene thermal conductive layer, copper sheet, and other internal components, preventing component oxidation or short circuit failure. The hot-pressing bonding method can not only ensure that the protective layer is tightly bonded to the graphene thermal conductive layer without affecting the heat dissipation effect of the thermal conductive layer, but also provide a solid external protection for the entire coil, improving the reliability of the coil in complex working environments.

[0015] Preferably, the outer surface of the nickel-plated transition layer has uniformly distributed honeycomb holes.

[0016] By adopting the above technical solution, the uniform honeycomb holes opened on the outer surface of the nickel-plated transition layer can increase the contact area between the nickel-plated transition layer and the second adhesive layer, making the bond between the two stronger. At the same time, the honeycomb holes can also form a small buffer space to absorb some stress when the coil vibrates, avoiding hard friction between the nickel-plated transition layer and adjacent components. This not only strengthens the bonding effect but also improves the fatigue resistance of the nickel-plated transition layer.

[0017] Preferably, the nickel-plated transition layer is disposed between the copper sheet and the second adhesive layer to enhance the adhesion between the copper sheet and the second adhesive layer.

[0018] By adopting the above technical solution, the nickel-plated transition layer is set between the copper sheet and the second adhesive layer. The nickel material has good adhesion to both the copper sheet and the second adhesive layer, which can significantly improve the bonding strength between the two and prevent the coil from peeling off between layers during long-term vibration, thereby further strengthening the connection stability between the inner core component and the outer layer component.

[0019] Preferably, the wire body is wound onto the speaker frame in a single-layer close-wound manner.

[0020] By adopting the above technical solution, the wire body is wound onto the speaker frame in a single-layer close-wound manner, which allows for a more regular coil arrangement and avoids insulation damage or wire wear caused by mutual friction between coil turns. The fixing method of winding onto the frame ensures that the coil maintains a stable position during diaphragm movement, preventing magnetic field disturbances or uneven structural stress caused by displacement.

[0021] In summary, this application includes at least one of the following beneficial technical effects: This speaker coil device solves the problem of easy breakage of traditional enameled wires through its inner core component. It utilizes the elasticity of the aluminum core itself to adapt to the back-and-forth movement of the speaker diaphragm. Five carbon fiber filaments are then evenly attached to the outside of the aluminum core through a first adhesive layer and then synchronously spirally twisted to form a stable whole. This achieves a uniform distribution of stress, preventing localized stress concentration and fundamentally improving fatigue resistance. To ensure a firm connection between the inner core component and the outer component, honeycomb holes are opened on the outer surface of the nickel-plated transition layer. This, combined with a second adhesive layer, increases the contact area and prevents delamination between layers due to long-term vibration. Finally, silver particles filled in the copper sheet ensure stable conductivity, and the graphene thermal conductive layer rapidly dissipates heat through axial heat dissipation holes, reducing the probability of aging. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the cross-sectional structure of this application; Figure 3 This is a schematic diagram of the planar structure of this application; Figure 4 This is a partial schematic diagram of the first structure of this application; Figure 5 This is a partial schematic diagram of the second structure of this application.

[0023] In the picture: 1. Wire body; 2. Inner core assembly; 201. Aluminum core body; 202. Carbon fiber filament; 3. Outer layer assembly; 301. Copper sheet; 302. Silver particles; 303. Graphene thermal conductive layer; 304. Heat dissipation holes; 305. Protective layer; 4. Connecting assembly; 401. First adhesive layer; 402. Second adhesive layer; 403. Nickel plating transition layer; 404. Honeycomb holes. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0025] Example 1: A loudspeaker coil device, referring to... Figure 1 , Figure 2 and Figure 3 The device includes a wire body 1, an inner core assembly 2, an outer layer assembly 3, and a connecting assembly 4. The wire body 1 is formed by spirally winding the inner core assembly 2 and the outer layer assembly 3 together through the connecting assembly 4. The inner core assembly 2 includes an aluminum core body 201 and carbon fiber filaments 202. The outer layer assembly 3 includes a copper sheet 301, a graphene thermally conductive layer 303, and a protective layer 305. The copper sheet 301 is filled with uniformly distributed silver particles 302. The graphene thermally conductive layer 303 covers the outside of the copper sheet 301, and the protective layer 305 covers the outside of the graphene thermally conductive layer 303. The connecting assembly 4 includes a first adhesive layer 401, a second adhesive layer 402, and a nickel-plated transition layer 403. There are five carbon fiber filaments 202, and the aluminum core body 201 is located inside the five carbon fiber filaments 202. The first adhesive layer 401 is coated on the outer surface of the aluminum core body 201, and the aluminum core body 201, the first adhesive layer 401 and five carbon fiber filaments 202 are synchronously spirally twisted to form a whole. The five carbon fiber filaments 202 are evenly wrapped around the outside of the aluminum core body 201, which can make the stress on the inner core component 2 more uniform and avoid structural damage caused by local stress concentration. The first adhesive layer 401 is coated on the outer surface of the aluminum core body 201, which can achieve a tight fit between the aluminum core body 201 and the carbon fiber filaments 202. After synchronous spiral twisting, the two can form a stable whole structure, which not only retains the elasticity of the aluminum core body 201 to adapt to the diaphragm movement, but also improves the fatigue resistance of the inner core component 2 with the high strength characteristics of the carbon fiber filaments 202, further reducing the risk of wire breakage.

[0026] Reference Figure 3 , Figure 4 and Figure 5 The first adhesive layer 401 is an epoxy adhesive layer, and the second adhesive layer 402 is a modified acrylic adhesive layer. The second adhesive layer 402 is coated on the outer surface of the five carbon fiber filaments 202. The first adhesive layer 401 is an epoxy adhesive layer, which has excellent bonding strength and aging resistance, ensuring that the aluminum core body 201 and the carbon fiber filaments 202 maintain a stable bond under long-term vibration. The second adhesive layer 402 is a modified acrylic adhesive layer coated on the outer surface of the carbon fiber filaments 202. This material has good compatibility with the carbon fiber filaments 202, which can achieve a tight connection between the inner core component 2 and the outer layer component 3, avoiding separation due to interlayer separation. To prevent coil structure failure and ensure overall structural stability, the graphene thermal conductive layer 303 has uniformly distributed heat dissipation holes 304 inside. The direction of the heat dissipation holes 304 is consistent with the axial direction of the aluminum core body 201. The graphene thermal conductive layer 303 itself has excellent thermal conductivity. When sleeved on the outside of the copper sheet 301, it can quickly absorb the heat generated when the coil is working. The through-type heat dissipation holes 304 opened along the axial direction of the aluminum core body 201 can form an axial air convection channel, so that the heat absorbed by the graphene thermal conductive layer 303 can be quickly discharged, avoiding the accumulation of heat inside the coil and the resulting accelerated component aging, making it more practical.

[0027] Example 2: A loudspeaker coil device, referring to Figure 2 , Figure 3 and Figure 5 Based on the same concept as Embodiment 1 above, this embodiment proposes that the protective layer 305 is a polyimide film, which is bonded and fixed to the outside of the graphene thermal conductive layer 303 by hot pressing. The polyimide film, as the protective layer 305, possesses excellent insulation properties, high temperature resistance, and corrosion resistance, effectively isolating external dust, moisture, and other impurities from corroding the graphene thermal conductive layer 303, copper sheet 301, and other internal components, preventing component oxidation or short circuit failure. The hot pressing bonding method ensures that the protective layer 305 is tightly bonded to the graphene thermal conductive layer 303 without affecting the heat dissipation effect of the thermal conductive layer, while also providing insulation for the entire... The coil provides a robust external protection, enhancing its reliability in complex working environments. The outer surface of the nickel-plated transition layer 403 is provided with uniformly distributed honeycomb holes 404. These uniformly distributed honeycomb holes 404 increase the contact area between the nickel-plated transition layer 403 and the second adhesive layer 402, making their adhesion stronger. At the same time, the honeycomb holes 404 can also form tiny buffer spaces, absorbing some stress when the coil vibrates, preventing hard friction between the nickel-plated transition layer 403 and adjacent components. This strengthens the bonding effect and improves the fatigue resistance of the nickel-plated transition layer 403.

[0028] Reference Figure 2 , Figure 3 and Figure 5 A nickel-plated transition layer 403 is disposed between the copper sheet 301 and the second adhesive layer 402 to enhance the bonding force between the copper sheet 301 and the second adhesive layer 402. The nickel-plated transition layer 403 exhibits good adhesion to both the copper sheet 301 and the second adhesive layer 402, significantly improving the bonding strength between them and preventing interlayer delamination during long-term coil vibration. This further strengthens the connection stability between the inner core assembly 2 and the outer layer assembly 3. The wire body 1 is wound onto the speaker frame using a single-layer close-wound method. This allows for a more regular coil arrangement, preventing insulation damage or wire wear caused by friction between coil turns. The fixed method of winding onto the frame ensures the coil maintains a stable position during diaphragm movement, preventing magnetic field disturbances or uneven structural stress due to displacement.

[0029] The implementation principle of this application embodiment is as follows: When the device is working, after the speaker coil formed by the wound wire body 1 is energized, the copper sheet 301 filled with silver particles 302 in the outer component 3 will generate an electromagnetic field. This electromagnetic field interacts with the magnetic field of the magnet inside the speaker, causing the diaphragm system to vibrate and produce sound. During this process, the inner core component 2 plays a key role in anti-fatigue support. The aluminum core body 201, with its good elasticity, deforms synchronously with the repeated vibration of the diaphragm. The five carbon fiber filaments 202 are tightly attached to the aluminum core body 201 through the first adhesive layer 401 and synchronously spirally twisted, which can evenly distribute the stress generated by vibration and avoid structural damage caused by local stress concentration. The connecting component 4... To ensure a stable connection between the various structures, the honeycomb holes 404 on the outer surface of the nickel-plated transition layer 403 increase the contact area with the second adhesive layer 402, making the inner core component 2 and the outer layer component 3 tightly connected. Even with long-term vibration, there will be no interlayer peeling. At the same time, the heat generated by the coil operation is quickly absorbed by the graphene thermal conductive layer 303 covering the outside of the copper sheet 301. The heat dissipation holes 304 opened along the axial direction of the aluminum core body 201 form an air convection channel to quickly dissipate the heat. The outer protective layer 305 isolates dust and moisture to prevent oxidation of the internal components. The design of the wire body 1 being tightly wound in a single layer on the skeleton ensures the stability of the coil position and makes the electromagnetic field distribution uniform, further improving the stability of the sound production.

Claims

1. A loudspeaker coil device, comprising a wire body (1), an inner core assembly (2), an outer layer assembly (3), and a connecting assembly (4), characterized in that: The wire body (1) is formed by spirally winding an inner core assembly (2) and an outer layer assembly (3) through a connecting assembly (4). The inner core assembly (2) includes an aluminum core body (201) and a carbon fiber filament (202). The outer layer assembly (3) includes a copper sheet (301), a graphene thermal conductive layer (303), and a protective layer (305). The copper sheet (301) is filled with uniformly distributed silver particles (302). The graphene thermal conductive layer (303) covers the outside of the copper sheet (301). The protective layer (305) covers the outside of the graphene thermal conductive layer (303). The connecting assembly (4) includes a first adhesive layer (401), a second adhesive layer (402), and a nickel-plated transition layer (403).

2. The loudspeaker coil device according to claim 1, characterized in that: The number of carbon fiber filaments (202) is five. The aluminum core body (201) is located inside the five carbon fiber filaments (202). The first adhesive layer (401) is coated on the outer surface of the aluminum core body (201). The aluminum core body (201), the first adhesive layer (401) and the five carbon fiber filaments (202) are synchronously spirally twisted together to form a whole.

3. A loudspeaker coil device according to claim 1, characterized in that: The first adhesive layer (401) is an epoxy adhesive layer, and the second adhesive layer (402) is a modified acrylic adhesive layer. The second adhesive layer (402) is coated on the outer surface of the five carbon fiber filaments (202).

4. A loudspeaker coil device according to claim 1, characterized in that: The graphene thermal conductive layer (303) has uniformly distributed heat dissipation holes (304) inside, and the direction of the heat dissipation holes (304) is consistent with the axial direction of the aluminum core body (201).

5. A loudspeaker coil device according to claim 1, characterized in that: The protective layer (305) is a polyimide film, which is bonded and fixed to the outside of the graphene thermal conductive layer (303) by hot pressing.

6. A loudspeaker coil device according to claim 1, characterized in that: The outer surface of the nickel-plated transition layer (403) is provided with uniformly distributed honeycomb holes (404).

7. A loudspeaker coil device according to claim 1, characterized in that: The nickel-plated transition layer (403) is disposed between the copper sheet (301) and the second adhesive layer (402) to enhance the bonding force between the copper sheet (301) and the second adhesive layer (402).

8. A loudspeaker coil device according to claim 1, characterized in that: The wire body (1) is wound onto the speaker frame in a single-layer close-wound manner.

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