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CN-121985267-A - Sound production device and electronic equipment

CN121985267ACN 121985267 ACN121985267 ACN 121985267ACN-121985267-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 first molecular sieve particles with the average particle size of 10-50 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 second molecular sieve particles, and the ventilation pore diameter of the ventilation isolation piece is smaller than the minimum particle size of the first molecular sieve particles. The first molecular sieve particles in the invention can be 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 generating device is effectively reduced, and the low-frequency acoustic performance of the sound generating device is improved.

Inventors

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

Assignees

  • 歌尔股份有限公司

Dates

Publication Date
20260505
Application Date
20251226

Claims (10)

  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 first molecular sieve particles and sound absorbing particles, wherein the sound absorbing particles are spheroidal particles formed by bonding a plurality of second molecular sieve particles with the average particle size D50 of 0.1-30 mu m, the average particle size D50 of the sound absorbing particles is 150-1000 mu m, the average particle size D50 of the first molecular sieve particles is 10-50 mu m, and the ventilation pore diameter of the ventilation separator is smaller than the minimum particle size of the first molecular sieve particles.
  2. 2. The sound-emitting device of claim 1, wherein the first molecular sieve particles have a packing volume of 3% -50% of the total volume of the sound-absorbing material, and the sound-absorbing particles have a packing volume of 50% -97% 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 first molecular sieve particles is greater than 4.
  4. 4. The sound generating apparatus of claim 1, wherein the sound absorbing particles comprise a through-hole structure having a pore size of 500 nm to 9000 nm.
  5. 5. The sound generating apparatus of claim 1, wherein the first molecular sieve particles and the second molecular sieve particles each independently comprise a microporous structure having a pore size of 0.4 nm to 1 nm; and/or, the external dimensions of the first molecular sieve particles and the second molecular sieve particles are kept consistent.
  6. 6. The sound emitting device of claim 1, wherein the first molecular sieve particle crystalline structure and the second molecular sieve particle crystalline structure each independently comprise one of MFI, MTW, FER, MOR, MEL, CHA, LTL crystalline structures; And/or the shape of the first molecular sieve particles and the shape of the second molecular sieve particles each independently comprise one of spherical, spheroidal, ellipsoidal, rod-like, cross-shaped, blocky, polygonal, irregular shapes.
  7. 7. 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.
  8. 8. The sound generating apparatus of claim 1, wherein the air-permeable separator comprises at least one of polyethylene terephthalate, polyethylene naphthalate, polypropylene, polyethylene, stainless steel, aluminum, copper, and natural fibers; or the breathable separation piece is a woven mesh.
  9. 9. 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.
  10. 10. An electronic device comprising the sound emitting apparatus according to any one of claims 1 to 9.

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, the requirements on the height of the micro-speaker module are more stringent, the structure is more limited, and the spacing of part of the structural areas is even less 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 first molecular sieve particles and sound absorbing particles with different particle size ranges as sound absorbing materials, the sound absorbing particles are spherical particles formed by bonding a plurality of second molecular sieve particles with average particle sizes D50 of 0.1-30 mu m, the average particle size D50 of the first molecular sieve particles is 10-50 mu m, the average particle size D50 of the sound absorbing particles is 150-1000 mu m, so that the first molecular sieve particles not only can be filled in a narrow space of the rear sound cavity to fully utilize the narrow space, but also can be filled in a gap 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 resonance frequency F0 of the sound generating device is effectively reduced, the low-frequency sensitivity is improved, and the low-frequency acoustic 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 first molecular sieve particles and sound absorbing particles, the sound absorbing particles are spherical particles formed by bonding a plurality of second molecular sieve particles with average particle sizes D50 of 0.1-30 mu m, the average particle size D50 of the sound absorbing particles is 150-1000 mu m, the average particle size D50 of the first molecular sieve particles is 10-50 mu m, and the ventilation pore diameter of the ventilation isolation piece is smaller than the minimum particle size of the first molecular sieve particles. In some embodiments, the first molecular sieve particles have a packing volume of 3% -50% of the total volume of the sound absorbing material, and the sound absorbing particles have a packing volume of 50% -97% 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 first molecular sieve particles is greater than 4. In some embodiments, the sound absorbing particles contain a through-hole structure with a pore size of 500nm to 9000 nm. In some embodiments, the first molecular sieve particles and the second molecular sieve particles each independently comprise a microporous structure having a pore size of 0.4 nm to 1 nm. In some embodiments, the first molecular sieve particles are sized to conform to the second molecular sieve particles. In some embodiments, the first molecular sieve particle crystalline structure and the second molecular sieve particle crystalline structure each independently comprise one of the MFI, MTW, FER, MOR, MEL, CHA, LTL form crystalline structures. In some embodiments, the shape of the first molecular sieve particles and the shape of the second molecular sieve particles each independently comprise one of spherical, spheroid, ellipsoidal, rod-like, cross-shaped, blocky, polygonal, irregular shapes. In some embodiments, the breathable barrier has a breathable content of 500L/m 2.s@20mmH2O~6000 L/m2.s@20mmH2 O. In some embodiments, the material of the breathable separator includes at least one of polyethylene terephthalate, polyethylene naphthalate, polypropylene, polyethylene, stainless steel, aluminum, copper, and natural fibers. In some embodiments, the breathable barrier is a woven mesh. In some embodiments, the sounding unit comprises