Diaphragm for speaker, and speaker

Abstract

The present invention provides a diaphragm for a speaker, and a speaker. The diaphragm comprises a main body portion and a conductive portion disposed at the main body portion. The conductive portion comprises a matrix and conductive materials dispersed in the matrix, and the mass percentage of the conductive materials in the conductive portion ranges from 35 wt% to 95 wt%. The conductive materials have at least one of the following shapes: spherical, flake-like, thin rod-like, and network-like. Conductive materials of a same shape have at least one size. A spherical conductive material has a particle size ranging from 0.01 μm to 20 μm; a flake-like conductive material has a thickness ranging from 0.05 μm to 5 μm and a length ranging from 0.01 μm to 20 μm; and a thin rod-like conductive material has a diameter ranging from 5 nm to 100 nm and a length ranging from 0.1 μm to 50 μm. The diaphragm for a speaker provided by the present invention has excellent electrical conductivity.

Description

A diaphragm for a loudspeaker and a loudspeaker TECHNICAL FIELD

[0001] The present application relates to the field of acoustoelectric technology, and in particular to a diaphragm for a loudspeaker and a loudspeaker. BACKGROUND

[0002] At present, the conductive part of the conductive diaphragm commonly used in the field of loudspeakers is mainly composed of a polymer matrix and a conductive material. In order to reduce the resistance of the conductive part and improve its conductivity during the preparation of the diaphragm, the mass fraction of the conductive material in the polymer matrix is usually increased. However, the increase of the mass fraction of the conductive material often reduces the toughness of the diaphragm, and the form of the added conductive material is often single, and the conductive path formed is unstable. The increase of the mass fraction of the conductive material not only reduces the toughness of the diaphragm, but also cannot effectively improve the conductivity of the conductive part, thereby increasing the preparation cost while failing to meet the conductivity requirement of the conductive diaphragm.

[0003] Therefore, it is necessary to provide a product to solve the above problems. TECHNICAL PROBLEM

[0004] The purpose of the present application is to provide a diaphragm for a sound generating device, which has excellent conductivity. Another purpose of the present application is to provide a loudspeaker using the above diaphragm. TECHNICAL SOLUTION

[0005] In order to achieve the above purpose, the present application provides a diaphragm for a loudspeaker, which comprises a main body part and a conductive part arranged on the main body part, the conductive part comprising a matrix and a conductive material dispersed in the matrix, the mass percentage of the conductive material in the conductive part being 35wt%-95wt%, the shape of the conductive material comprising at least one of spherical, flaky, thin rod and network, wherein the conductive material of the same shape comprises at least one size, the particle size of the spherical conductive material being 0.01-20μm, the thickness of the flaky conductive material being 0.05-5μm and the length being 0.01-20μm, the diameter of the thin rod-shaped conductive material being 5-100nm and the length being 0.1-50μm.

[0006] Preferably, the conductive material comprises at least one of a metal material, a metal compound and a carbon-based material.

[0007] Preferably, the metal material comprises at least one of silver, gold, copper, aluminum, nickel, vanadium, indium and palladium.

[0008] Preferably, the metal compound comprises at least one of indium oxide, tin oxide, zinc oxide and titanium nitride.

[0009] Preferably, the carbon-based material includes at least one of carbon black, graphene, and carbon nanotubes.

[0010] Preferably, the conductive material comprises at least one combination of silver and gold, gold and copper, silver and copper, silver and nickel, silver and vanadium, silver and indium, and silver and palladium.

[0011] Preferably, the material of the matrix includes at least one of thermoplastic elastomer, polyurethane, silicone rubber, acrylate rubber, ethylene acrylate rubber, nitrile rubber, and hydrogenated nitrile rubber.

[0012] Preferably, the conductive portion is disposed on one side of the main body portion or the conductive portion is at least partially embedded in the main body portion.

[0013] Preferably, the conductive part is coated or adhered to one side of the main body; or the conductive part is integrally injection molded with the main body.

[0014] The present invention also provides a loudspeaker using the above-described diaphragm, the loudspeaker comprising the diaphragm described above for loudspeakers. Beneficial effects

[0015] According to the present invention, a diaphragm for a loudspeaker includes a main body and a conductive portion disposed on the main body. The conductive portion includes a substrate and a conductive material dispersed in the substrate. The conductive material accounts for 35wt% to 95wt% of the conductive portion by mass. The conductive material has a shape including at least one selected from spherical, sheet-like, rod-like, and network-like forms. The conductive material of the same shape includes at least one size: the spherical conductive material has a particle size of 0.01-20 μm; the sheet-like conductive material has a thickness of 0.05-5 μm and a length of 0.01-20 μm; and the rod-like conductive material has a diameter of 5-100 nm and a length of 0.1-50 μm. By adding conductive materials of different morphologies to the substrate and controlling the size of conductive materials of different shapes, the conductivity of the conductive portion can be improved more efficiently, reducing costs while improving the conductivity of the conductive portion to meet the conductivity requirements of the diaphragm. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 is a schematic diagram of the diaphragm structure when the conductive part 2 of the present invention is disposed on one side of the main body part 1;

[0018] Figure 2 is a schematic diagram of the structure of the diaphragm when the conductive part 2 of the present invention is at least partially embedded in the main body 1. Embodiments of the present invention

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] As shown in Figures 1-2, the present invention provides a diaphragm for a loudspeaker. The diaphragm 100 includes a main body 1 and a conductive part 2 disposed on the main body 1. The conductive part 2 includes a substrate and a conductive material dispersed in the substrate. The conductive material accounts for 35wt% to 95wt% of the mass percentage of the conductive part 2. The shape of the conductive material includes at least one of spherical, sheet-like, rod-like, and network-like shapes. The conductive material of the same shape includes at least one size. The particle size of the spherical conductive material is 0.01-20μm, the thickness of the sheet-like conductive material is 0.05-5μm and the length is 0.01-20μm, and the diameter of the rod-like conductive material is 5-100nm and the length is 0.1-50μm. By adding conductive materials of different shapes to the substrate and controlling the size of conductive materials of different shapes, the conductivity of the conductive part can be improved more efficiently. This reduces costs while improving the conductivity of the conductive part, thus meeting the conductivity requirements of the diaphragm.

[0021] The present invention controls the mass percentage of conductive material in conductive part 2 to be between 35% and 95%, such as 35%, 45%, 55%, 65%, 75%, 85%, 95%, etc.

[0022] Furthermore, the shape of the conductive material includes at least one of spherical, sheet-like, rod-like, and network-like forms, wherein the conductive material of the same shape includes at least one size. It should be noted that the rod-like conductive material can also refer to the wire-like or fibrous form, and there is no limitation on this.

[0023] Preferably, the conductive material includes a combination of various shapes such as spheres, sheets, rods, or networks.

[0024] Preferably, the particle size range of the spherical conductive material is 0.01-20 μm, such as 0.01 μm, 0.1 μm, 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, etc., allowing for more uniform dispersion of the spherical conductive material in the matrix; the thickness of the sheet-like conductive material is 0.05-5 μm and the length is 0.01-20 μm, such as 0.05 μm, 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, etc., and the length is 0.01 μm, 0.1 μm, 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, etc.; the diameter of the thin rod-shaped conductive material is 5-100 nm. The conductive materials, such as thin rods with diameters ranging from 5nm, 10nm, 20nm, 50nm, 60nm, 80nm, and 100nm, and lengths ranging from 0.1μm, 1μm, 10μm, 20μm, 30μm, 40μm, and 50μm, can be interwoven with sheet-like and thin rod-like conductive materials, resulting in a larger contact area and a more stable conductive network. The network-like conductive materials can provide more and more stable conductive pathways. By adding conductive materials of different shapes to the matrix and controlling the dimensions of conductive materials of different shapes, the conductivity of the conductive parts can be improved more efficiently, resulting in superior conductivity that meets the conductivity requirements of the diaphragm.

[0025] Preferably, an appropriate amount of nanoscale conductive material can be selectively added to the micron-scale conductive material and distributed in the gaps between the micron-scale conductive material. Through the tunneling effect, the conductive network is promoted and improved, thereby efficiently improving the conductivity of the conductive part 2.

[0026] Preferably, in some embodiments, as shown in FIG1, the conductive part 2 can be disposed on one side of the main body part 1, such as by coating or pasting the conductive part 2 on one side of the main body part 1.

[0027] In some other embodiments, as shown in FIG2, the conductive part 2 may also be at least partially embedded in the main body part 1, such as the conductive part 2 and the main body part 1 being integrally injection molded.

[0028] Furthermore, the conductive material includes at least one of metallic materials, metallic compounds, and carbon-based materials. Preferably, the metallic material includes at least one of silver, gold, copper, aluminum, and nickel; preferred conductive materials include at least one combination of silver and gold, gold and copper, silver and copper, silver and nickel, silver and vanadium, silver and indium, and silver and palladium. The metallic compound includes at least one of indium oxide, tin oxide, zinc oxide, and titanium nitride; the carbon-based material includes at least one of carbon black, graphene, and carbon nanotubes.

[0029] Furthermore, the matrix material includes at least one of thermoplastic elastomer, polyurethane, silicone rubber, acrylate rubber, ethylene acrylate rubber, nitrile rubber, and hydrogenated nitrile rubber.

[0030] Example 1: The conductive material in the matrix is ​​70% by mass, of which 10% is rod-shaped conductive material, 30% is spherical conductive material, and 30% is sheet-shaped conductive material, with a resistivity of 1.1e-6Ωm.

[0031] Comparative Example 1: The matrix contains 70% conductive material by mass, of which 40% is spherical conductive material and 30% is sheet-like conductive material by mass, with a resistivity of 1.5e-6Ωm.

[0032] The resistivity of Example 1 is 1.1e-6Ωm, and the resistivity of Comparative Example 1 is 1.5e-6Ωm. Compared with Comparative Example 1, the resistivity of Example 1 is reduced by 26.7%. With the same amount of conductive material added, the conductivity is significantly improved. This shows that the addition of conductive materials of different forms can effectively improve the conductivity of the conductive part 2.

[0033] The present invention also provides a loudspeaker, wherein the loudspeaker employs the diaphragm of the above embodiment.

[0034] This invention controls the mass percentage of conductive material in the conductive part 2 to be within the range of 35%-95%. The shape of the conductive material includes at least one of spherical, sheet-like, rod-like, and network-like forms. The conductive material of the same shape includes at least one size. The particle size of the spherical conductive material is 0.01-20 μm, the thickness of the sheet-like conductive material is 0.05-5 μm and the length is 0.01-20 μm, and the diameter of the rod-like conductive material is 5-100 nm and the length is 0.1-50 μm. By adding conductive materials of different forms to the matrix and controlling the size of conductive materials of different shapes, the conductivity of the conductive part can be improved more efficiently. At the same time, the conductivity of the conductive part is improved while reducing costs, thus meeting the conductivity requirements of the diaphragm.

[0035] The above are merely embodiments of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A diaphragm for a speaker comprising a main portion and a conductive portion provided to the main portion, the conductive portion comprising a base and a conductive material dispersed in the base, characterized in that, The conductive material accounts for 35wt%-95wt% of the conductive part, and the shape of the conductive material includes at least one of a spherical shape, a sheet shape, a thin rod shape, and a network shape, wherein the conductive material of the same shape includes at least one size, the particle size of the conductive material in a spherical shape is 0.01-20μm, the thickness of the conductive material in a sheet shape is 0.05-5μm and the length is 0.01-20μm, the diameter of the conductive material in a thin rod shape is 5-100nm and the length is 0.1-50μm.

2. The diaphragm for a loudspeaker of claim 1, wherein: The conductive material includes at least one of a metal material, a metal compound, and a carbon-based material.

3. The diaphragm for a loudspeaker of claim 2, wherein: The metal material includes at least one of silver, gold, copper, aluminum, nickel, vanadium, indium, and palladium.

4. The diaphragm for a loudspeaker of claim 2, wherein: The metal compound includes at least one of indium oxide, tin oxide, zinc oxide, and titanium nitride.

5. The diaphragm for a loudspeaker of claim 2, wherein: The carbon-based material includes at least one of carbon black, graphene, and carbon nanotubes.

6. The diaphragm for a loudspeaker of claim 3, wherein: The conductive material includes at least one combination of silver and gold, gold and copper, silver and copper, silver and nickel, silver and vanadium, silver and indium, and silver and palladium.

7. The diaphragm for a loudspeaker of claim 1, wherein: The material of the substrate includes at least one of a thermoplastic elastomer, a polyurethane, a silicone rubber, an acrylate rubber, an ethylene-acrylate rubber, a nitrile rubber, and a hydrogenated nitrile rubber.

8. The diaphragm for a loudspeaker of claim 1, wherein: The conductive part is provided on one side of the main body part or at least partially embedded in the main body part.

9. The diaphragm for a loudspeaker of claim 1, wherein: The conductive part is coated or pasted on one side of the main body part; or the conductive part is integrally injection molded with the main body part.

10. A loudspeaker, characterized by: The loudspeaker includes the diaphragm for a loudspeaker according to any one of claims 1-9.

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