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CN-122002186-A - Conductive vibrating diaphragm, preparation method thereof and sounding device

CN122002186ACN 122002186 ACN122002186 ACN 122002186ACN-122002186-A

Abstract

The application relates to the technical field of electroacoustic technology, in particular to a conductive vibrating diaphragm, a preparation method thereof and a sound generating device. The conductive vibrating diaphragm comprises a vibrating diaphragm main body part and a conductive part, wherein the conductive part is at least partially embedded in the vibrating diaphragm main body part or is arranged on the surface of the vibrating diaphragm main body part, the conductive part comprises one or more of a spiral fiber conductive material and a woven mesh fiber conductive material, and the spiral fiber conductive material and the woven mesh fiber conductive material respectively independently comprise a matrix fiber and a conductive layer coated on the surface of the matrix fiber. The conductive vibrating diaphragm provided by the application can relieve the problem of insufficient resistance stability in a stretching state, can reduce the surface density of the vibrating diaphragm and avoid the influence of the resonant frequency.

Inventors

  • CHENG GUOWEI
  • LUO MINGYA

Assignees

  • 美特科技(苏州)有限公司

Dates

Publication Date
20260508
Application Date
20260210

Claims (11)

  1. 1. The conductive vibrating diaphragm is characterized by comprising a vibrating diaphragm main body part and a conductive part, wherein the conductive part is at least partially embedded in the vibrating diaphragm main body part and/or is arranged on the surface of the vibrating diaphragm main body part; wherein the conductive portion comprises one or more of a spiral fibrous conductive material and a woven mesh fibrous conductive material; The spiral fiber conductive material and the woven mesh fiber conductive material each independently comprise a matrix fiber and a conductive layer coated on the surface of the matrix fiber.
  2. 2. The conductive diaphragm of claim 1, wherein the base fiber comprises one or more of polyester, polyamide, polyacrylonitrile and polypropylene, and the conductive layer comprises, by mass, 5-10 parts of nano conductive metal, 0.2-8 parts of resin, 0-2 parts of functional auxiliary agent and 0-10 parts of conductive polymer.
  3. 3. The conductive diaphragm of claim 2 wherein the conductive layer has one or more of the following characteristics: (1) The nano conductive metal is made of one or more of silver, copper and aluminum; (2) The resin comprises one or more of polyurethane, polyether ether ketone and thermoplastic polyester elastomer; (3) The functional auxiliary agent comprises one or more of dispersing agent, binder, leveling agent, thickening agent, defoaming agent, preservative and pH regulator; (4) The conductive polymer includes one or more of poly (3, 4-ethylenedioxythiophene) and sodium polystyrene sulfonate.
  4. 4. A conductive diaphragm according to any one of claims 1 to 3, wherein the conductive diaphragm has one or more of the following features: (1) The wire diameter of the matrix fiber is 5 nm-100 mu m; (2) The thickness of the conductive layer is 10 nm-50 mu m; (3) The spiral form of the spiral fiber conductive material comprises one or more of a cylindrical spiral, a conical spiral, a DNA-like double-winding spiral and a fractal spiral structure; (4) The pitch of the spiral fiber conductive material is 50-500 mu m or 20-300 nm; (5) The spiral outer diameter of the spiral fiber conductive material is 50-500 mu m or 20-300 nm; (6) The porosity of the woven mesh fiber conductive material is 20% -50%; (7) The material of the vibrating diaphragm main body part comprises one or more of polyether-ether-ketone, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, silicon rubber, ethylene-acrylic ester rubber, acrylic ester rubber and hydrogenated nitrile rubber.
  5. 5. A conductive diaphragm according to any one of claims 1 to 3, wherein when the conductive portion is disposed on the surface of the diaphragm main body, the conductive portion further comprises an elastic polymer; In the conductive part, the mass fraction of the elastic polymer is 70% -80%; Optionally, the elastomeric polymer comprises one or more of polyetheretherketone, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, silicone rubber, ethylene-acrylate rubber, and hydrogenated nitrile rubber.
  6. 6. The conductive diaphragm of claim 5, wherein a first dielectric layer is further disposed between the conductive portion and the diaphragm body, and optionally wherein the first dielectric layer comprises one or more of polyetheretherketone, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, silicone rubber, ethylene-acrylate rubber, and hydrogenated nitrile rubber, and/or, And optionally, the second dielectric layer is made of one or more of polyether ether ketone, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, silicone rubber, ethylene-acrylic ester rubber, acrylic ester rubber and hydrogenated nitrile rubber.
  7. 7. A method for preparing a conductive diaphragm according to any one of claims 1 to 6, comprising the steps of: Preparing a conductive vibrating diaphragm by integrally forming the material of the conductive part and the material of the vibrating diaphragm main body part, wherein at least part of the conductive part in the conductive vibrating diaphragm is embedded in the vibrating diaphragm main body part; Or alternatively Preparing a conductive part from a material of a vibrating diaphragm body, namely preparing the conductive part into conductive slurry, and preparing the conductive vibrating diaphragm by utilizing composite molding of the conductive slurry and the vibrating diaphragm body, wherein the conductive part in the conductive vibrating diaphragm is arranged on the surface of the vibrating diaphragm body; the conductive part comprises one or more of the spiral fiber conductive material and the woven mesh fiber conductive material, and each of the spiral fiber conductive material and the woven mesh fiber conductive material independently comprises a matrix fiber and a conductive layer coated on the surface of the matrix fiber.
  8. 8. The method of manufacturing a conductive diaphragm of claim 7, wherein the step of manufacturing the spiral-shaped fibrous conductive material and the woven mesh-shaped fibrous conductive material comprises: Providing matrix fibers, coating metal slurry on the surfaces of the matrix fibers, and baking and aging or ultraviolet curing to form a conductive layer.
  9. 9. The method for producing a conductive diaphragm according to claim 8, wherein the metal paste comprises, in parts by mass, 5 to 10 parts of a nano conductive metal, 0.2 to 8 parts of a resin, 0 to 2 parts of a functional auxiliary agent, 0 to 10 parts of a conductive polymer and 50 to 90 parts of a solvent, and/or, The manner of coating includes one or more of spraying and dipping.
  10. 10. The method for preparing the conductive diaphragm according to claim 8 or 9, wherein the step of preparing the spiral fiber conductive material comprises the steps of providing a base fiber, coating metal slurry on the surface of the base fiber, baking and aging or ultraviolet curing to form a conductive layer, and winding the base fiber with the conductive layer formed thereon to prepare the spiral fiber conductive material; Or the preparation method of the spiral fiber conductive material comprises the steps of providing a matrix fiber, winding the matrix fiber to form the spiral matrix fiber, coating metal slurry on the surface of the matrix fiber, baking and aging or ultraviolet curing to form a conductive layer, preparing the spiral fiber conductive material, and/or, The preparation method of the knitted netlike fiber conductive material comprises the steps of providing matrix fibers, coating metal slurry on the surfaces of the matrix fibers, baking and aging or ultraviolet curing to form a conductive layer, and carrying out knitting treatment on the matrix fibers with the conductive layer to prepare the knitted netlike fiber conductive material; Or alternatively The preparation method of the knitted netlike fiber conductive material comprises the steps of providing base fibers, knitting the base fibers to form knitted netlike base fibers, coating metal slurry on the surfaces of the base fibers, and baking, aging or ultraviolet curing to form a conductive layer.
  11. 11. A sound generating device is characterized by comprising the conductive vibrating diaphragm according to any one of claims 1-6 or the conductive vibrating diaphragm prepared by the preparation method according to any one of claims 7-10.

Description

Conductive vibrating diaphragm, preparation method thereof and sounding device Technical Field The application relates to the technical field of electroacoustic technology, in particular to a conductive vibrating diaphragm, a preparation method thereof and a sound generating device. Background The acoustic performance of sound generating devices such as loudspeakers, headphones and the like is based on the cooperative matching of the mechanical properties and the electrical conductivity of the diaphragm. At present, the conductive vibrating diaphragm of the sound generating device is mainly formed by adding nano metal wires into a conductive part so as to improve the conductive performance of the conductive vibrating diaphragm. But the resistance stability of the conductive diaphragm in a stretching state is insufficient, and the introduction of the nano metal wire increases the surface density of the diaphragm, so that the resonant frequency of the diaphragm is influenced. Disclosure of Invention Based on the above, the application provides a conductive vibrating diaphragm, a preparation method thereof and a sound generating device. The conductive vibrating diaphragm provided by the application can relieve the problem of insufficient resistance stability in a stretching state, can reduce the surface density of the vibrating diaphragm and avoid the influence of the resonant frequency. In a first aspect of the present application, there is provided a conductive diaphragm, including a diaphragm body portion and a conductive portion, where the conductive portion is at least partially embedded in the diaphragm body portion and/or the conductive portion is disposed on a surface of the diaphragm body portion; wherein the conductive portion comprises one or more of a spiral fibrous conductive material and a woven mesh fibrous conductive material; The spiral fiber conductive material and the woven mesh fiber conductive material each independently comprise a matrix fiber and a conductive layer coated on the surface of the matrix fiber. In some embodiments, the base fiber comprises one or more of polyester, polyamide, polyacrylonitrile and polypropylene, and the conductive layer comprises, by mass, 5-10 parts of nano conductive metal, 0.2-8 parts of resin, 0-2 parts of functional auxiliary agent and 0-10 parts of conductive polymer. In some embodiments, the nano-conductive metal comprises one or more of silver, copper, and aluminum. In some of these embodiments, the resin comprises one or more of polyurethane, polyetheretherketone, and thermoplastic polyester elastomer. In some of these embodiments, the functional aid includes one or more of a dispersant, a binder, a leveling agent, a thickener, a defoamer, a preservative, and a pH adjuster. In some of these embodiments, the conductive polymer comprises one or more of poly (3, 4-ethylenedioxythiophene) and sodium polystyrene sulfonate. In some embodiments, the wire diameter of the matrix fiber is 5 nm-100 μm. In some embodiments, the thickness of the conductive layer is 10nm to 50 μm. In some of these embodiments, the helical morphology of the helical fibrous conductive material comprises one or more of a cylindrical helix, a conical helix, a DNA-like double-wound helix, and a fractal helix structure. In some embodiments, the pitch of the spiral fiber conductive material is 50-500 μm or 20-300 nm. In some embodiments, the spiral outer diameter of the spiral fiber conductive material is 50-500 μm or 20-300 nm. In some embodiments, the woven mesh fiber conductive material has a porosity of 20% -50%. In some embodiments, the material of the diaphragm body part includes one or more of polyether ether ketone, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, silicone rubber, ethylene-acrylate rubber, acrylate rubber and hydrogenated nitrile rubber. In some embodiments, when the conductive portion is disposed on the surface of the diaphragm main body, the conductive portion further includes an elastic polymer; in the conductive part, the mass fraction of the elastic polymer is 70% -80%. Optionally, the elastomeric polymer comprises one or more of polyetheretherketone, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, silicone rubber, ethylene-acrylate rubber, and hydrogenated nitrile rubber. In some embodiments, a first dielectric layer is further disposed between the conductive portion and the diaphragm body portion, and optionally, the material of the first dielectric layer includes one or more of polyetheretherketone, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, silicone rubber, ethylene-acrylate rubber, and hydrogenated nitrile rubber. And optionally, the second dielectric layer is made of one or more of polyether ether ketone, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, silicone rubber, ethylene-acrylic ester rubber, acrylic ester rubber and hydrogenated nitrile rubb