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CN-122002167-A - Sound production device and electronic equipment

CN122002167ACN 122002167 ACN122002167 ACN 122002167ACN-122002167-A

Abstract

The invention belongs to the technical field of electroacoustic technology, and particularly relates to a sound generating device and electronic equipment, wherein the sound generating device comprises a shell, a sound generating monomer and a ventilation isolation piece, wherein the sound generating monomer and the shell are arranged in the shell, a front sound cavity and a rear sound cavity are defined in the shell, sound absorbing materials are filled in the rear sound cavity, the ventilation isolation piece is used for isolating the sound absorbing materials and the sound generating monomer, the sound absorbing materials comprise active carbon powder particles with the average particle size of 5-100 mu m and sound absorbing particles with the average particle size of 150-1000 mu m, the sound absorbing particles are spherical-like particles formed by bonding a plurality of molecular sieve particles, the surface layer of the active carbon particles is provided with a hydrophobic structure, and the ventilation aperture of the ventilation isolation piece is smaller than the minimum particle size of the active carbon particles. The active carbon particles in the invention are filled in the narrow space of the rear acoustic cavity and the gaps where the sound-absorbing particles are accumulated, so that the filling amount of the sound-absorbing material in the rear acoustic cavity is increased, the resonant frequency of the sound-producing device is effectively reduced, and the low-frequency sound-producing effect is improved.

Inventors

  • PAN QUANQUAN
  • WANG CUICUI
  • LING FENGGUANG
  • LI CHUN

Assignees

  • 歌尔股份有限公司

Dates

Publication Date
20260508
Application Date
20251226

Claims (14)

  1. 1. A sound generating device is characterized by comprising a shell with an inner space, a sound generating monomer and a ventilation isolation piece, wherein the sound generating monomer and the shell are arranged in the shell, the sound generating monomer is matched with the shell to define a front sound cavity and a rear sound cavity in the inner space of the shell, sound absorbing materials are filled in the rear sound cavity, the ventilation isolation piece is used for isolating the sound absorbing materials and the sound generating monomer, The sound absorbing material comprises active carbon particles and sound absorbing particles, the sound absorbing particles are spheroidal particles formed by bonding a plurality of molecular sieve particles, the average particle diameter D50 of the sound absorbing particles is 150-1000 mu m, The surface layer of the activated carbon powder particles is provided with a hydrophobic structure, the average particle size D50 of the activated carbon powder particles is 5-100 mu m, and the ventilation pore diameter of the ventilation separator is smaller than the minimum particle size of the activated carbon powder particles.
  2. 2. The sound-producing device of claim 1, wherein the activated carbon particles comprise 4% -50% of the total volume of the sound-absorbing material, and the sound-absorbing particles comprise 50% -96% of the total volume of the sound-absorbing material.
  3. 3. The sound-emitting device of claim 1, wherein the ratio of the average particle size D50 of the sound-absorbing particles to the average particle size D50 of the activated carbon particles is greater than 5.
  4. 4. The sound generating apparatus of claim 1, wherein the sound absorbing particles comprise a through-hole structure having a pore size of 500nm to 8000 nm.
  5. 5. The sound-producing device of claim 1, wherein the sound-absorbing particles are spheroidal particles formed by bonding an adhesive to a plurality of molecular sieve particles having an average particle size of 0.1 μm to 30 μm.
  6. 6. The sound emitting device of claim 1, wherein the crystalline structure of the molecular sieve particles comprises one of MFI, MTW, FER, MOR, MEL, CHA, LTL crystalline structures; and/or the silicon-aluminum ratio of the molecular sieve particles is greater than 10.
  7. 7. The sound generating apparatus of claim 1, wherein the hydrophobic structure of the activated carbon particles comprises at least one of a silane hydrophobic group, a fluorine atom-containing graft group, a metal oxide hydrophobic layer, a graphene layer, and a carbon nanotube layer.
  8. 8. The sound emitting device of claim 1, wherein the activated carbon particles have a water absorption of <5%.
  9. 9. The sound generating apparatus according to claim 1, wherein the activated carbon particles have a microporous structure with a pore diameter of 0.3 nm to 1.8 nm; And/or the specific surface area of the activated carbon powder particles is more than 1000m 2 /g.
  10. 10. The sound generating apparatus of claim 1, wherein the shape of the activated carbon particles comprises one of spherical, spheroidal, ellipsoidal, rod-like, cross-shaped, blocky, polygonal, and irregular.
  11. 11. The sound emitting apparatus of claim 1, wherein the breathable barrier has a breathable content of 500L/m 2 .s@20mmH 2 O~6000 L/m 2 .s@20mmH 2 O.
  12. 12. The sound generating apparatus of claim 1, wherein the air-permeable separator comprises one of polyethylene terephthalate, polyethylene naphthalate, polypropylene, polyethylene, stainless steel, aluminum, copper, and natural fiber; Or the breathable separation piece is a woven mesh.
  13. 13. The sound-producing device of claim 1, wherein the sound-producing unit comprises a housing having an interior cavity, the housing having a gas outlet opening in communication with the interior cavity, the gas-permeable barrier being coupled to the housing and shielding the gas outlet opening, or The casing includes interconnect's first casing and second casing, first casing with the second casing surrounds and forms casing inner space, first casing is close to one side of second casing is equipped with first mounting groove, the second casing is close to one side of first casing is equipped with the second mounting groove, ventilative isolator is including the installing frame and set up ventilative subassembly in the installing frame, the relative both sides of installing frame install respectively in first mounting groove with the second mounting groove.
  14. 14. An electronic device comprising the sound emitting apparatus according to any one of claims 1 to 13.

Description

Sound production device and electronic equipment Technical Field The invention belongs to the technical field of electroacoustic technology, and particularly relates to a sound generating device and electronic equipment. Background With the advent of folding machines in recent years, the requirements on the height of the micro-speaker module are very strict, the structure is more limited, and the spacing between partial structure areas is even smaller than 100 μm. However, the particle size of zeolite sound-absorbing particles added into the rear sound cavity is above 200 μm, so that the existing zeolite sound-absorbing particles cannot effectively fill the narrow areas, space waste of the partial areas is caused, and the requirement of the loudspeaker on low resonant frequency F0 cannot be met. Thus, there is a need for improvements in existing speakers. Disclosure of Invention The invention aims to provide a sound generating device and electronic equipment, wherein the sound generating device is filled in a rear sound cavity by mixing active carbon particles and sound absorbing particles with different particle size ranges as sound absorbing materials, the sound absorbing particles are similar spherical particles formed by bonding a plurality of molecular sieve particles, the surface layers of the active carbon particles are of hydrophobic structures, the average particle size D50 of the active carbon particles is set to be between 5 and 100 mu m, the average particle size D50 of the sound absorbing particles is set to be between 150 and 1000 mu m, so that the active carbon particles not only can be filled in a narrow space of the rear sound cavity, but also can be filled in gaps where the sound absorbing particles are stacked, the total filling rate of the sound absorbing materials in the rear sound cavity is increased to 99%, the resonant frequency F0 of the sound generating device is effectively reduced, the low-frequency sensitivity is improved, and the low-frequency sound generating effect of the sound generating device is better. The invention provides a sound generating device, which comprises a shell with an inner space, a sound generating monomer and a ventilation isolation piece, wherein the sound generating monomer and the shell are arranged in the shell, the sound generating monomer is matched with the shell to define a front sound cavity and a rear sound cavity in the inner space of the shell, sound absorbing materials are filled in the rear sound cavity, the ventilation isolation piece is used for isolating the sound absorbing materials and the sound generating monomer, the sound absorbing materials comprise active carbon particles and sound absorbing particles, the sound absorbing particles are quasi-spherical particles formed by bonding a plurality of molecular sieve particles, the average particle size D50 of the sound absorbing particles is 150-1000 mu m, the surface layer of the active carbon particles is provided with a hydrophobic structure, the average particle size D50 of the active carbon particles is 5-100 mu m, and the ventilation aperture of the ventilation isolation piece is smaller than the minimum particle size of the active carbon particles. In some embodiments, the activated carbon particles comprise 4% -50% of the total volume of the sound absorbing material, and the sound absorbing particles comprise 50% -96% of the total volume of the sound absorbing material. In some embodiments, the ratio of the average particle size D50 of the sound absorbing particles to the average particle size D50 of the activated carbon particles is greater than 5. In some embodiments, the sound absorbing particles contain a through-hole structure with a pore size of 500 nm to 8000 nm. In some embodiments, the sound absorbing particles are spheroidal particles formed by bonding an adhesive with a plurality of molecular sieve particles having an average particle size of 0.1 μm to 30 μm. In some embodiments, the crystalline structure of the molecular sieve particles comprises one of the MFI, MTW, FER, MOR, MEL, CHA, LTL crystalline structures. In some embodiments, the molecular sieve particles have a silica to alumina ratio greater than 10. In some embodiments, the hydrophobic structure of the activated carbon particles comprises at least one of a silane hydrophobic group, a fluorine atom-containing grafting group, a metal oxide hydrophobic layer, a graphene layer, a carbon nanotube layer. In some embodiments, the activated carbon particles have a water absorption of <5%. In some embodiments, the activated carbon powder particles contain a microporous structure with a pore size of 0.3 nm to 1.8 nm. In some embodiments, the activated carbon particles have a specific surface area greater than 1000 m 2/g. In some embodiments, the shape of the activated carbon particles comprises one of spherical, spheroid, ellipsoidal, rod-like, cross-shaped, blocky, polygonal, irregular. In some embodiments, the brea