Voice coil and sound production device provided with voice coil

Abstract

The invention relates to the technical field of sound production products, in particular to a voice coil and a sound production device provided with the voice coil, comprising a voice coil structure, the voice coil structure comprises a voice coil support and a voice coil wire, the voice coil support is composed of a mounting part, a lower connecting part and a winding part, the mounting part, the lower connecting part and the winding part are of an integrated structure, and the top of the mounting part is provided with a fixing groove. Heat dissipation holes are formed in the side face of the winding part in a penetrating mode, a voice coil wire is arranged outside the winding part and sequentially comprises a conductor layer, an insulating layer and an adhesive layer from inside to outside, the conductor layer is wrapped with the insulating layer, the insulating layer is wrapped with the adhesive layer, and the space between the insulating layer and the adhesive layer is filled with heat conduction particles. The heat dissipation protection layer is arranged outside the voice coil wire through injection molding, the space between the heat dissipation protection layer and the voice coil wire is filled with the heat conduction particles, through the arrangement of the voice coil structure, stable work of the voice coil structure is guaranteed, meanwhile, the service life of the voice coil is prolonged, and through the arrangement of the sound production device, the voice coil structure and the sound production structure body can be stably connected.

Description

Technical Field

[0001] The present invention relates to the technical field of sound-generating products, and in particular to a voice coil and a sound-generating device provided with the voice coil. Background Art

[0002] In recent years, consumer electronic products have developed rapidly, and electronic devices such as mobile phones and tablets have been widely used by consumers. Among them, speakers are important acoustic components in electronic products, which are used to convert electrical signals into sound for consumers to listen to. With the rapid development of technologies related to electronic products, consumers have put forward higher performance requirements for the acoustic performance of electronic products.

[0003] However, this patent still has certain shortcomings when in use. During the sounding process, since the current passes through the voice coil to generate a magnetic field, the heating of the voice coil is inevitable. The high temperature caused by excessive power is likely to cause a series of faults in the sounding device, and will also affect the life of the sounding device, not only affecting the sound quality of the sounding device, but also reducing the service life of the sounding device. At the same time, due to frequent high-speed vibrations, it is easy to cause the voice coil to loosen, the number of coil turns to be disordered or broken, greatly reducing the service life. In addition, the voice coil and the sounding device are fixed by multiple screws. The screws will be stripped after repeated use, and the screws are very troublesome to operate when disassembling and installing, and the efficiency is low. Summary of the invention

[0004] The object of the present invention is to provide a voice coil and a sound generating device provided with the voice coil, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A voice coil and a sound-generating device provided with the voice coil, comprising a voice coil structure, wherein the voice coil structure comprises a voice coil bracket and a voice coil wire, wherein the voice coil bracket consists of a mounting portion, a lower connecting portion and a winding portion, wherein the mounting portion, the lower connecting portion and the winding portion are an integrated structure, wherein a fixing groove is provided on the top of the mounting portion, a heat dissipation hole is provided through the side of the winding portion, a voice coil wire is provided on the outside of the winding portion, wherein the voice coil wire comprises a conductor layer, an insulating layer and a glue layer from the inside to the outside, wherein the conductor layer is wrapped with an insulating layer, wherein the insulating layer is wrapped with a glue layer, wherein heat-conductive particles are filled between the insulating layer and the glue layer, wherein a heat-dissipating protective layer is provided on the outside of the voice coil wire by injection molding, and heat-conductive particles are filled between the heat-dissipating protective layer and the voice coil wire.

[0007] As a preferred solution of the present invention, during the winding process of the voice coil wire, hot melt technology is used to melt the glue layer for adhesion and fixation, and the material of the glue layer is set to epoxy resin or polyurethane.

[0008] As a preferred solution of the present invention, the thermally conductive particles are configured as graphene particles or PVC plastic particles, and the diameter of the thermally conductive particles is configured to be less than 50 μm.

[0009] As a preferred solution of the present invention, the material of the voice coil bracket is set to aluminum alloy, the outside of the voice coil bracket is coated with an insulating coating, and the aperture of the heat dissipation hole is set to 0.3 mm.

[0010] As a preferred solution of the present invention, it includes a sound-emitting structure, a sealing gasket, a voice coil structure, a diaphragm and a fixed structure, the sound-emitting structure is provided with an inner cavity, a permanent magnet is arranged inside the inner cavity, a groove is provided on the top of the sound-emitting structure, a sealing gasket is arranged in the groove, a voice coil structure is arranged on the top of the sealing gasket, the diaphragm is arranged on the top of the mounting part, and a movable cavity is provided inside the sound-emitting structure.

[0011] As a preferred solution of the present invention, the fixed structure is arranged inside the moving cavity, and the fixed structure includes a rotating block, a rotating rod, a moving block, a pulling block, a plug-in block and a spring. The moving cavity is slidably connected with the moving block, and the top of the moving block is fixedly connected to the rotating block through a rotating rod.

[0012] As a preferred solution of the present invention, the rotating rod and the sound-generating structure are slidably connected, a pulling block is provided on the top of the rotating block, a plug-in block is provided on the bottom of the rotating block, the plug-in block is plugged into the fixed groove, and a spring is provided on the top of the moving block.

[0013] As a preferred solution of the present invention, one end of the spring is elastically connected to the inner wall of the moving cavity, the other end of the spring is elastically connected to the top of the moving block, and a damping element is arranged inside the moving cavity.

[0014] As a preferred solution of the present invention, the bottom of the sealing gasket fits with the inside of the groove, the top of the sealing gasket fits with the bottom of the mounting portion, and the material of the sealing gasket is set to silicone.

[0015] As a preferred solution of the present invention, the thickness range of the diaphragm is set to 6-9 μm, and the surface of the diaphragm is provided with a DLC coating.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the poor heat dissipation effect of the voice coil and the looseness of the voice coil coil are solved by setting the voice coil structure, thereby ensuring that the voice coil can work stably and reducing the impact on the sound-generating device. When the voice coil structure is manufactured, the voice coil wire is wound on the outside of the voice coil bracket, the conductor layer can transmit the current passing through the lead wire, and the insulating layer can isolate the electromagnetic field generated by the conductor layer to prevent the electromagnetic field from affecting the surrounding circuits and causing interference and damage to the circuits. Then, in the process of winding the voice coil wire, the glue layer is melted by hot melting technology. , so that the voice coil wires are adhered and fixed, thereby preventing the coil from loosening. At the same time, thermal conductive particles are arranged between the insulating layer and the rubber layer. When the voice coil generates heat during operation, the thermal conductive particles can conduct the heat out, achieving a good heat dissipation effect. Then, the thermal conductive particles are coated on the outside of the voice coil wire, and then a heat dissipation protective layer is formed by thermoplasticization. The surface of the heat dissipation protective layer has tiny micropores that can conduct heat out. At the same time, the heat dissipation protective layer can support the voice coil wire, and cooperate with the heat dissipation holes to achieve common heat dissipation, thereby ensuring the stable operation of the voice coil structure and also increasing the service life of the voice coil.

[0018] 2. In the present invention, a structure for quickly disassembling and assembling the voice coil structure is formed by the coordinated use of the voice coil structure, the sound-generating structure and the fixed structure. At the same time, by setting a sealing gasket, the sealing property of the connection between the voice coil structure and the sound-generating structure is ensured, and the stability of the connection is ensured. When the voice coil structure needs to be disassembled, several pull blocks are pulled upwards respectively until the rotating block drives the plug-in block and the fixed groove to separate. At this time, the spring is squeezed, and then the pull block is rotated so that the bottom of the rotating block no longer abuts against the top of the mounting portion, and then the voice coil structure and the sound-generating structure can be assembled. The structure is separated. When the voice coil structure needs to be installed, the voice coil structure is first placed on the top of the sealing gasket, and then the pull block is pulled upward and rotated to make the plug-in block and the fixing groove correspond to each other, and then the pull block is released, and the force generated by the spring rebound is used to tightly fit the plug-in block and the fixing groove. At the same time, the sealing gasket is squeezed and deformed, thereby sealing the connection between the voice coil structure and the sound-emitting structure, thereby enhancing the stability of the connection between the voice coil structure and the sound-emitting structure, reducing the vibration and wear of the voice coil structure during operation, and thus extending the service life of the sound-emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the voice coil structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the voice coil bracket of the present invention;

[0021] Figure 3 It is an overall schematic diagram of the sound-generating device of the present invention;

[0022] Figure 4It is an exploded schematic diagram of the sound-generating device of the present invention;

[0023] Figure 5 It is a schematic diagram of the interior of the sound-generating device of the present invention;

[0024] Figure 6 It is a schematic diagram of the fixing structure of the present invention;

[0025] Figure 7 It is a schematic cross-sectional view of the voice coil wire of the present invention.

[0026] In the figure: 1. voice coil structure; 2. fixing groove; 3. heat dissipation hole; 4. voice coil wire; 5. mounting part; 6. lower connecting part; 7. winding part; 8. sound-generating structure; 9. inner chamber; 10. groove; 11. sealing gasket; 12. diaphragm; 13. fixing structure; 14. permanent magnet; 15. moving cavity; 16. rotating block; 17. rotating rod; 18. moving block; 19. pulling block; 20. plug-in block; 21. spring; 401. conductor layer; 402. insulating layer; 403. adhesive layer. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] For examples, see Figure 1-7 , the present invention provides a technical solution:

[0029] A voice coil and a sound-generating device provided with the voice coil, comprising a voice coil structure 1, a sound-generating structure body 8, a sealing pad 11, the voice coil structure 1, a diaphragm 12 and a fixing structure 13, wherein an inner chamber 9 is provided inside the sound-generating structure body 8, a permanent magnet 14 is provided inside the inner chamber 9, a groove 10 is provided on the top of the sound-generating structure body 8, a sealing pad 11 is provided in the groove 10, a voice coil structure 1 is provided on the top of the sealing pad 11, a diaphragm 12 is provided on the top of a mounting portion 5, a bottom of the sealing pad 11 is fitted with the inside of the groove 10, a top of the sealing pad 11 is fitted with the bottom of the mounting portion 5, a material of the sealing pad 11 is set to silicone, a thickness range of the diaphragm 12 is set to 6-9 μm, and a DLC coating is provided on the surface of the diaphragm 12.

[0030] In this embodiment, Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, the voice coil structure 1 includes a voice coil bracket and a voice coil wire 4, the voice coil bracket is composed of a mounting portion 5, a lower connecting portion 6 and a winding portion 7, the mounting portion 5, the lower connecting portion 6 and the winding portion 7 are an integrated structure, a fixing groove 2 is provided on the top of the mounting portion 5, a heat dissipation hole 3 is provided through the side of the winding portion 7, a voice coil wire 4 is arranged on the outside of the winding portion 7, and the voice coil wire 4 includes a conductor layer 401, an insulating layer 402 and a glue layer 403 from the inside to the outside, the outside of the conductor layer 401 is wrapped with an insulating layer 402, the outside of the insulating layer 402 is wrapped with a glue layer 403, the insulating layer 402 and the glue layer 403 are wrapped with a conductive layer 401, and the conductive layer 401 is wrapped with an insulating layer 402. The layers 403 are filled with thermal conductive particles, the outside of the voice coil wire 4 is provided with a heat dissipation protective layer by injection molding, the heat conductive particles are filled between the heat dissipation protective layer and the voice coil wire 4, and the adhesive layer 403 is melted and bonded and fixed by hot melt technology during the winding process of the voice coil wire 4. The material of the adhesive layer 403 is set to epoxy resin or polyurethane, the thermal conductive particles are set to graphene particles, or PVC plastic particles, the diameter of the thermal conductive particles is set to be less than 50μm, the material of the voice coil bracket is set to aluminum alloy, the outside of the voice coil bracket is coated with an insulating coating, and the aperture of the heat dissipation hole 3 is set to 0.3mm.

[0031] The voice coil structure 1 is provided to solve the problems of poor heat dissipation of the voice coil and easy loosening of the voice coil, thereby ensuring that the voice coil can work stably and reducing the impact on the sound-generating device. When the voice coil structure 1 is manufactured, the voice coil wire 4 is wound around the outside of the voice coil bracket, the conductor layer 401 can transmit the current passing through the lead wire, and the insulating layer 402 can isolate the electromagnetic field generated by the conductor layer 401 to prevent the electromagnetic field from affecting the surrounding circuits and causing interference and damage to the circuits. Then, during the winding process of the voice coil wire 4, the insulating layer 402 is connected to the voice coil bracket by hot melting technology. The adhesive layer 403 is melted by technology, so that the voice coil wires 4 are adhered and fixed, thereby preventing the coil from loosening. At the same time, heat-conducting particles are arranged between the insulating layer 402 and the adhesive layer 403. When the voice coil generates heat during operation, the heat-conducting particles can conduct the heat out, thereby achieving a good heat dissipation effect. Then, the heat-conducting particles are coated on the outside of the voice coil wire 4, and then a heat dissipation protective layer is formed by thermoplasticization. The surface of the heat dissipation protective layer has tiny micropores that can conduct heat out, and cooperates with the heat dissipation holes 3 to achieve common heat dissipation, thereby ensuring the stable operation of the voice coil structure 1 and also improving the service life of the voice coil.

[0032] In this embodiment, Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a movable cavity 15 is opened inside the sound-generating structure 8, and a fixed structure 13 is arranged inside the movable cavity 15. The fixed structure 13 includes a rotating block 16, a rotating rod 17, a movable block 18, a pulling block 19, a plug-in block 20 and a spring 21. The movable block 18 is slidably connected in the movable cavity 15, and the top of the movable block 18 is fixedly connected to the rotating block 16 through the rotating rod 17. The rotating rod 17 is slidably connected to the sound-generating structure 8, a pulling block 19 is arranged on the top of the rotating block 16, and a plug-in block 20 is arranged on the bottom of the rotating block 16. The plug-in block 20 is plugged into the fixed groove 2, and a spring 21 is arranged on the top of the movable block 18. One end of the spring 21 is elastically connected to the inner wall of the movable cavity 15, and the other end of the spring 21 is elastically connected to the top of the movable block 18. A damping element is arranged inside the movable cavity 15.

[0033] Among them, through the coordinated use of the voice coil structure 1, the sound-generating structure 8 and the fixed structure 13, a structure for quickly disassembling and assembling the voice coil structure 1 is formed. At the same time, by setting the sealing gasket 11, the sealing of the connection between the voice coil structure 1 and the sound-generating structure 8 is ensured, and the stability of the connection is ensured. When the voice coil structure 1 needs to be disassembled, several pull blocks 19 are pulled upward respectively until the rotating block 16 drives the plug-in block 20 and the fixed groove 2 to separate. At this time, the spring 21 is squeezed, and then the pull block 19 is rotated so that the bottom of the rotating block 16 no longer abuts against the top of the mounting portion 5, and then the voice coil structure 1 and the sound-generating structure can be assembled. 8 is separated. When the voice coil structure 1 needs to be installed, the voice coil structure 1 is first placed on the top of the sealing gasket 11, and then the pull block 19 is pulled upward and rotated to make the plug-in block 20 correspond to the fixing groove 2, and then the pull block 19 is released, and the plug-in block 20 and the fixing groove 2 are tightly fitted by the force generated by the rebound of the spring 21. At the same time, the sealing gasket 11 is squeezed and deformed, so that the connection between the voice coil structure 1 and the sound-emitting structure 8 is sealed, so that the stability of the connection between the voice coil structure 1 and the sound-emitting structure 8 is enhanced, and the vibration and wear of the voice coil structure 1 during operation are reduced, thereby extending the service life of the sound-emitting device.

[0034] The working process of the present invention: when a voice coil and a sound-generating device provided with the voice coil designed by the present invention are working, the voice coil structure 1 is manufactured by winding a voice coil wire 4 on the outside of the voice coil bracket, the conductor layer 401 can transmit the current passing through the lead wire, and the insulating layer 402 can isolate the electromagnetic field generated by the conductor layer 401 during operation to prevent the electromagnetic field from affecting the surrounding circuits and causing interference and damage to the circuits. Then, during the winding process of the voice coil wire 4, the glue layer 403 is melted by hot-melt technology to make the voice coil wires 4 adhered and fixed, thereby preventing the coil from loosening. At the same time, heat-conducting particles are arranged between the insulating layer 402 and the glue layer 403. When the voice coil generates heat during operation, the heat-conducting particles can conduct the heat out, achieving a good heat dissipation effect. Then, the heat-conducting particles are coated on the outside of the voice coil wire 4, and then a heat dissipation protective layer is formed by thermoplasticization. The surface of the heat dissipation protective layer has fine micropores that can conduct heat out, and cooperates with the heat dissipation holes 3 to achieve joint heat dissipation, thereby ensuring the voice coil structure. The stable operation of the structure 1 is ensured by pulling the plurality of pull blocks 19 upwards respectively, until the rotating block 16 drives the plug-in block 20 and the fixed groove 2 to separate. At this time, the spring 21 is squeezed, and then the pull block 19 is rotated so that the bottom of the rotating block 16 no longer abuts against the top of the mounting portion 5. Then, the voice coil structure 1 and the sound-generating structure 8 can be separated. When the voice coil structure 1 needs to be installed, the voice coil structure 1 is first placed on the top of the sealing gasket 11, and then the pull block 19 is pulled upwards and rotated so that the plug-in block 20 and the fixed groove 2 correspond. Then, the pull block 19 is released, and the plug-in block 20 and the fixed groove 2 are tightly fitted by the force generated by the rebound of the spring 21. At the same time, the sealing gasket 11 is squeezed and deformed, thereby sealing the connection between the voice coil structure 1 and the sound-generating structure 8, so that the stability of the connection between the voice coil structure 1 and the sound-generating structure 8 is enhanced, and the vibration and wear of the voice coil structure 1 during operation are reduced, thereby extending the service life of the sound-generating device.

[0035] 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 voice coil, comprising a voice coil structure (1), characterized in that: The voice coil structure (1) comprises a voice coil support and a voice coil wire (4), wherein the voice coil support comprises a mounting portion (5), a lower connecting portion (6) and a winding portion (7), wherein the mounting portion (5), the lower connecting portion (6) and the winding portion (7) are an integrated structure, wherein a fixing groove (2) is provided on the top of the mounting portion (5), a heat dissipation hole (3) is provided through the side of the winding portion (7), and a voice coil wire (4) is provided on the outside of the winding portion (7), wherein the voice coil wire (4) From the inside to the outside, it comprises a conductor layer (401), an insulating layer (402) and a glue layer (403) in sequence; the conductor layer (401) is wrapped with an insulating layer (402) on the outside; the insulating layer (402) is wrapped with a glue layer (403) on the outside; thermal conductive particles are filled between the insulating layer (402) and the glue layer (403); a heat dissipation protective layer is formed on the outside of the voice coil wire (4) by injection molding; and thermal conductive particles are filled between the heat dissipation protective layer and the voice coil wire (4).

2. A voice coil according to claim 1, characterized in that: During the winding process of the voice coil wire (4), a hot melt technology is used to melt the adhesive layer (403) for adhesion and fixation, and the material of the adhesive layer (403) is set to epoxy resin or polyurethane.

3. A voice coil according to claim 1, characterized in that: The heat-conducting particles are configured as graphene particles or PVC plastic particles, and the diameter of the heat-conducting particles is configured to be less than 50 μm.

4. A voice coil according to claim 1, characterized in that: The material of the voice coil support is set to be aluminum alloy, the outside of the voice coil support is coated with an insulating coating, and the aperture of the heat dissipation hole (3) is set to be 0.3 mm.

5. A sound-generating device provided with a voice coil, suitable for a voice coil as claimed in any one of claims 1 to 4, comprising a sound-generating structure (8), a sealing gasket (11), a voice coil structure (1), a diaphragm (12) and a fixing structure (13), characterized in that: The sound-generating structure (8) has an inner chamber (9) formed therein, a permanent magnet (14) is arranged inside the inner chamber (9), a groove (10) is formed at the top of the sound-generating structure (8), a sealing gasket (11) is arranged in the groove (10), a voice coil structure (1) is arranged at the top of the sealing gasket (11), the diaphragm (12) is arranged at the top of the mounting portion (5), and a movable cavity (15) is formed therein.

6. A sound generating device with a voice coil according to claim 5, characterized in that: The fixed structure (13) is arranged inside the movable cavity (15), and the fixed structure (13) comprises a rotating block (16), a rotating rod (17), a movable block (18), a pulling block (19), a plug-in block (20) and a spring (21). The movable cavity (15) is slidably connected with the movable block (18), and the top of the movable block (18) is fixedly connected to the rotating block (16) via the rotating rod (17).

7. A sound generating device with a voice coil according to claim 6, characterized in that: The rotating rod (17) and the sound-generating structure (8) are slidably connected, a pulling block (19) is arranged at the top of the rotating block (16), a plug-in block (20) is arranged at the bottom of the rotating block (16), the plug-in block (20) is plugged into the fixed groove (2), and a spring (21) is arranged at the top of the moving block (18).

8. A sound generating device with a voice coil according to claim 7, characterized in that: One end of the spring (21) is elastically connected to the inner wall of the moving chamber (15), and the other end of the spring (21) is elastically connected to the top of the moving block (18), and a damping element is arranged inside the moving chamber (15).

9. A sound generating device with a voice coil according to claim 5, characterized in that: The bottom of the sealing gasket (11) fits in with the inside of the groove (10), the top of the sealing gasket (11) fits in with the bottom of the mounting portion (5), and the material of the sealing gasket (11) is set to be silicone.

10. A sound generating device with a voice coil according to claim 5, characterized in that: The thickness of the diaphragm (12) is set to be in the range of 6-9 μm, and the surface of the diaphragm (12) is provided with a DLC coating.

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