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CN-122027923-A - Sound-absorbing assembly, sound-producing device and electronic equipment

CN122027923ACN 122027923 ACN122027923 ACN 122027923ACN-122027923-A

Abstract

The invention belongs to the technical field of electroacoustic, and particularly relates to a sound absorption assembly, a sound production device and electronic equipment, wherein the sound absorption assembly comprises a shell, and first molecular sieve particles and sound absorption particles which are mixed and filled in an inner accommodating space of the shell, and the filling volume ratio of the sound absorption particles to the first molecular sieve particles is 1:0.4-1; the sound absorbing particles are similar spherical particles formed by bonding a plurality of second molecular sieve particles, the shell is provided with ventilation holes communicated with the accommodating space, and the pore diameter of the ventilation holes is smaller than the minimum particle diameter of the first molecular sieve particles. According to the sound-absorbing assembly, the first molecular sieve particles and the sound-absorbing particles are mixed and filled in the shell of the sound-absorbing assembly, the first molecular sieve particles can be filled in gaps generated by stacking the sound-absorbing particles, so that the filling amount of sound-absorbing materials in the sound-absorbing assembly is greatly increased, the low-frequency acoustic performance of the sound-producing device is improved, and even if the sound-absorbing particles are cracked in the working process, the shell also plays a good role in isolation, and the sound-producing monomers are prevented from being polluted by broken powder.

Inventors

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

Assignees

  • 歌尔股份有限公司

Dates

Publication Date
20260512
Application Date
20251226

Claims (11)

  1. 1. The sound absorption assembly is characterized by comprising a shell with an accommodating space, and first molecular sieve particles and sound absorption particles mixed and filled in the accommodating space, wherein the filling volume ratio of the sound absorption particles to the first molecular sieve particles is 1:0.4-1; The sound absorbing particles are similar spherical particles formed by bonding a plurality of second molecular sieve particles, the shell is provided with ventilation holes communicated with the accommodating space, and the pore diameter of each ventilation hole is smaller than the minimum particle diameter of the first molecular sieve particles.
  2. 2. The sound absorbing assembly of claim 1, wherein the housing comprises a main housing and a cover housing, the main housing and the cover housing circumscribing to form the receiving space, At least one of the main shell and the cover shell is of a ventilation structure, and the ventilation structure is provided with the ventilation holes.
  3. 3. The sound absorbing assembly of claim 2, wherein the air permeable structure has an air permeability of 800 mm/s to 1500 mm/s and/or, The breaking strength of the ventilation structure is more than or equal to 5N, and the breaking elongation is more than or equal to 2%.
  4. 4. The sound absorbing assembly of claim 2, wherein the air permeable structure has an areal density of 20 g/m 2 ~80 g/m 2 , and/or, The breathable structure is made of at least one of fiber woven cloth, non-woven cloth, hot melt net film, open-cell polymer foaming material and nuclear pore film.
  5. 5. The sound absorbing assembly of claim 2, wherein one of the main housing and the cover housing is a non-breathable structure comprising a film or sheet of at least one of polypropylene, polyethylene, polycarbonate, polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer, polyamide, and/or, The cover shell and the main shell are bonded by an adhesive or a hot melt.
  6. 6. The sound absorbing assembly of claim 1, wherein the shell has a thickness of 0.1 mm to 0.5 mm.
  7. 7. The sound absorbing assembly of claim 1, wherein the sound absorbing particles have an average particle size D50 of 200 μm to 450 μm and/or, The average particle diameter D50 of the first molecular sieve particles and the average particle diameter D50 of the second molecular sieve particles are respectively 10-50 mu m independently.
  8. 8. The sound absorbing assembly of claim 1, wherein the sound absorbing particles have a bulk density of 0.3 g/cm 3 ~0.8 g/cm 3 and/or, The first molecular sieve particles have a bulk density of 0.4 g/cm 3 ~0.8 g/cm 3 .
  9. 9. The sound absorbing assembly of claim 1, wherein the first molecular sieve particle crystalline structure and the second molecular sieve particle crystalline structure each independently comprise one of MOR, MFI, FER, MTW, MEL, CHA, LTL crystalline structures, and/or, The crystal morphology of the first molecular sieve particles and the crystal morphology of the second molecular sieve particles each independently comprise one of spherical, spheroidal, ellipsoidal, rod-like, cross-shaped, block-like, polygonal, irregular shapes.
  10. 10. A sound generating device is characterized by comprising a shell with an inner space and a sound generating monomer arranged in the shell, wherein the sound generating monomer is matched with the shell to limit a front sound cavity and a rear sound cavity in the inner space of the shell, The sound absorbing assembly of any one of claims 1-9 disposed within the rear acoustic cavity.
  11. 11. An electronic device comprising the sound emitting apparatus of claim 10.

Description

Sound-absorbing assembly, sound-producing device and electronic equipment Technical Field The invention belongs to the technical field of electroacoustic technology, and particularly relates to a sound absorption assembly, a sound production device and electronic equipment. Background At present, in order to solve the problem that the low-frequency performance of a loudspeaker is reduced due to the reduction of the space of a rear acoustic cavity, technicians generally fill sound-absorbing particles made of porous materials into the rear acoustic cavity so as to realize the virtual increase effect of the resonance space of the acoustic rear cavity of the loudspeaker. However, the average particle size of the sound-absorbing particles filled in the rear sound cavity is generally 300-400 μm, and when the particles are stacked, gaps among the particles are generated, so that the volume of the rear sound cavity cannot be effectively filled, the acoustic improvement effect is reduced, in the power-on operation of the loudspeaker, the sound-absorbing particles flow along with air flow in the rear sound cavity, collision and friction occur between the sound-absorbing particles and the cavity wall or the sound-absorbing particles, and the sound-absorbing particles are easy to break and fall off to pollute sounding monomers. Thus, there is a need for improvements in existing speakers. Disclosure of Invention The invention aims to provide a sound absorption assembly, a sound production device and electronic equipment, wherein the sound absorption assembly can adopt a full-coverage structural design, can completely fill and fit all spaces of a rear sound cavity, first molecular sieve particles and sound absorption particles are mixed and filled in a shell of the sound absorption assembly, the first molecular sieve particles can be filled in gaps generated by stacking the sound absorption particles, the filling quantity of sound absorption materials is greatly increased, the low-frequency acoustic performance of the sound production device is further improved, the sound absorption materials are limited and accommodated in the shell of the sound absorption assembly, the shell can play a good isolation role even if the sound absorption particles are broken in the working process, the sound production monomers are prevented from being polluted by broken powder, and the durability and the service life of the sound absorption materials are improved. The invention provides a sound absorbing assembly, which comprises a shell with an accommodating space, and first molecular sieve particles and sound absorbing particles mixed and filled in the accommodating space, wherein the filling volume ratio of the sound absorbing particles to the first molecular sieve particles is 1:0.4-1, the sound absorbing particles are spheroidal particles formed by bonding a plurality of second molecular sieve particles, ventilation holes communicated with the accommodating space are formed in the shell, and the pore diameter of each ventilation hole is smaller than the minimum particle diameter of each first molecular sieve particle. In some embodiments, the housing comprises a main housing and a cover housing, the main housing and the cover housing surround to form the accommodation space, at least one of the main housing and the cover housing is a ventilation structure, and the ventilation structure is provided with the ventilation holes. In some embodiments, the air permeability of the air permeable structure is 800 mm/s to 1500 mm/s. In some embodiments, the breathable structure has a breaking strength of 5N or greater and an elongation at break of 2% or greater. In some embodiments, the areal density of the breathable structure is 20 g/m-80 g/m 2. In some embodiments, the material of the ventilation structure includes at least one of a fibrous woven fabric, a non-woven fabric, a hot melt web, an open cell polymer foam, and a core-cell membrane. In some embodiments, one of the main housing and the cover housing further comprises a non-breathable structure, and the non-breathable structure comprises a film or sheet of at least one of polypropylene, polyethylene, polycarbonate, polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer, and polyamide. In some embodiments, the cover housing and the main housing are bonded by an adhesive or a hot melt. In some embodiments, the thickness of the housing is 0.1 mm to 0.5 mm. In some embodiments, the sound absorbing particles have an average particle size D50 of 200 μm to 450 μm. In some embodiments, the average particle size D50 of the first molecular sieve particles and the average particle size D50 of the second molecular sieve particles are each independently 10 μm to 50 μm. In some embodiments, the sound absorbing particles have a bulk density of 0.3 g/cm 3~0.8 g/cm3. In some embodiments, the first molecular sieve particles have a bulk density of 0.4 g/cm 3~0.8 g/cm3. In some embodiments, the fi