WO2020224277A1 - Sound production apparatus - Google Patents

Sound production apparatus Download PDF

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Publication number
WO2020224277A1
WO2020224277A1 PCT/CN2019/129015 CN2019129015W WO2020224277A1 WO 2020224277 A1 WO2020224277 A1 WO 2020224277A1 CN 2019129015 W CN2019129015 W CN 2019129015W WO 2020224277 A1 WO2020224277 A1 WO 2020224277A1
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WO
WIPO (PCT)
Prior art keywords
sound
cavity
supporting structure
air
diaphragm
Prior art date
Application number
PCT/CN2019/129015
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French (fr)
Chinese (zh)
Inventor
张北京
蔡晓东
Original Assignee
歌尔股份有限公司
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Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2020224277A1 publication Critical patent/WO2020224277A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the invention relates to the technical field of electroacoustic products, in particular to a sound generating device.
  • a speaker module in order to obtain a better acoustic effect, especially in order to obtain a better low frequency effect, a speaker module generally fills the back cavity of the module with sound-absorbing particles.
  • the main method is to set a separate filling area in the cavity formed by the module shell, and isolate the sound-absorbing particles from the sound generation by means of hot-melt mesh or plug-in mesh. unit.
  • the mesh cloth is mainly fixed by hot melt or bonding, and these two processes require that the fixed surface must be flat, so the setting of the filling area is largely limited by the cavity structure, and the cavity space inside the module is difficult It is fully utilized and the filling volume is too small.
  • the main purpose of the present invention is to provide an acoustic device, which aims to solve the problems of poor air permeability of the sound absorption area as a whole and limited low frequency improvement effect due to the limitation of the cavity structure in the prior art.
  • the present invention provides an acoustic device, which includes an external housing with a housing space and a sounding unit installed and fixed in the housing cavity.
  • the sounding unit includes a diaphragm, and the front side of the diaphragm is connected to The space between the outer casings forms a first cavity, and the space between the back side of the diaphragm and the outer casing forms a second cavity, wherein,
  • a part of the space in the second cavity is set as a sound-absorbing cavity; the sound-absorbing cavity is enclosed by a supporting structure fixed in the second cavity and a breathable spacer combined with the supporting structure; Each surface of the supporting structure is at least partially open, for assembling the air-permeable isolator; the sound-absorbing cavity is filled with sound-absorbing material.
  • the supporting structure is made of metal.
  • the support structure is formed by metal powder injection molding.
  • the supporting structure is made of plastic material and is integrally injection molded.
  • the supporting structure is a regular/irregular polyhedral structure.
  • the outer contour of the supporting structure is a regular rectangular parallelepiped frame structure, wherein the supporting structure is surrounded by a supporting arm into six faces, and the six faces are arranged in an open manner; the air-permeable partition is correspondingly provided with Six, respectively, are fixed on the support arms surrounding each surface.
  • a fixing part fixed to the supporting structure is provided on the outer shell, and the fixing part is arranged corresponding to an edge position of the supporting structure.
  • the outer contour of the support structure is a regular rectangular parallelepiped frame structure
  • the fixing portion is a protrusion set corresponding to the corner position of the support structure
  • the protrusion is integrally formed with the outer casing
  • the supporting structure are fixed together by gluing or hot melt.
  • the air-permeable spacer is a split structure, which is respectively fixed on each surface of the support structure; or, the air-permeable spacer is an integrally formed structure.
  • the air-permeable spacer is a metal mesh, which is integrally formed with the support structure through a metal powder injection process; or, the air-permeable spacer is a non-metal mesh, which is bonded and fixed or combined with the support structure by injection molding.
  • the sound-absorbing material is porous sound-absorbing particles, and the maximum pore size of the mesh of the air-permeable spacer is smaller than the minimum particle size of the sound-absorbing particles.
  • the outer shell is provided with a sound outlet, and the airflow generated by the vibration of the diaphragm is radiated from the sound outlet on the front side of the diaphragm via the first cavity; The air flow generated by the vibration of the diaphragm is communicated with the sound-absorbing cavity via the air-permeable isolator on the back side of the diaphragm.
  • the sound outlet is arranged at a position of the outer casing facing the diaphragm; or the sound outlet is arranged on a side of the outer casing.
  • the outer shell includes a first shell and a second shell that are assembled with each other; or, the outer shell includes a first shell, a second shell, and a second shell that are assembled with each other.
  • the outer shell includes a first shell, a second shell, and a second shell that are assembled with each other.
  • the sound-absorbing cavity is enclosed by a supporting frame with at least partially open design on each surface and a breathable partition.
  • the sound-absorbing cavity Each surface of the body can receive the sound waves generated by the vibration of the diaphragm, that is, a full-permeable filling cavity is formed.
  • the overall air permeability of the sound-absorbing area is improved, and the sound-absorbing material can be fully expanded.
  • the volume of the virtual back cavity is increased to a greater extent.
  • the support frame of the sound device of the technical scheme of the present invention can be made by a metal powder injection molding process. Compared with the existing process, it will not be restricted by the cavity structure, hot melt process and processing accuracy, and can be more adequate.
  • the use of the space in the second cavity further improves the low-frequency acoustic performance of the product.
  • Figure 1 is an exploded view of the structure of an embodiment of the acoustic device of the present invention
  • FIG. 2 is a schematic cross-sectional view of an embodiment of the acoustic device of the present invention.
  • Figure 3 is a perspective view of an embodiment of the acoustic device of the present invention.
  • External housing 10, sound outlet, 101, first cavity, 102, second cavity, 11, first housing, 12, second housing, 121, fixing part, 2. sounding unit, 3. Support structure, 31. Support arm, 4. Breathable isolator, 5. Diaphragm.
  • the present invention proposes an acoustic device, which includes an external casing with a receiving space and a sounding unit installed and fixed in the receiving cavity.
  • the sounding unit includes a diaphragm.
  • the space between the front side of the diaphragm and the outer casing forms a second A cavity.
  • the space between the back side of the diaphragm and the outer casing forms a second cavity.
  • part of the space in the second cavity is set as a sound-absorbing cavity ,
  • the sound-absorbing cavity is enclosed by a supporting structure fixed in the second cavity and a gas-permeable spacer combined with the supporting structure.
  • Each surface of the supporting structure is at least partially open to assemble the gas-permeable spacer
  • the inside of the sound-absorbing cavity is filled with sound-absorbing material.
  • the sound generating device of this embodiment specifically includes an outer housing 1.
  • the outer housing 1 includes a first housing 11 and a second housing 12 assembled with each other. After the first shell 11 and the second shell 12 are assembled, a receiving cavity is formed, and the sound generating unit 2 is installed and fixed in the receiving cavity.
  • the sounding unit 2 further includes a diaphragm 5, and the sounding unit 2 divides the cavity formed by the outer casing 1 into two cavities. Specifically, the space between the front side of the diaphragm 5 and the outer casing 1 forms a first cavity
  • the body 101 is the front acoustic cavity of the sound device.
  • the first cavity 101 communicates with the sound outlet 10.
  • the sound waves generated by the vibration of the diaphragm 5 radiate to the outside from the sound outlet 10 through the first cavity 101; the back of the diaphragm 5
  • the space between the side and the outer casing 1 forms a second cavity 102, the second cavity 102 and the first cavity 101 are isolated from each other, as the back acoustic cavity of the sound device, the second cavity 102 is an acoustically sealed structure ,
  • the airflow generated by the vibration of the diaphragm on the back side is enclosed in the space of the second cavity 102 to avoid acoustic short circuit.
  • part of the space in the second cavity 102 is set as a sound-absorbing cavity, and the virtual volume in the cavity is increased by the sound-absorbing material.
  • the suction cavity is specifically enclosed by the supporting structure 3 fixed in the second cavity 102 and the breathable spacer 4 assembled with the supporting structure 3.
  • the supporting structure 3 provides the outer frame of the sound-absorbing cavity, and the air-permeable spacer 4 mainly contributes to the air flow between the sound-emitting unit and the sound-absorbing material and prevents the sound-absorbing material from escaping to the sound-emitting unit 2.
  • each surface of the support structure 3 is set to be at least partially open, that is, in the different support structures.
  • the sound absorbing material near the end of the sound unit and the sound absorbing material far away from the end of the sound unit can effectively expand the capacity.
  • the supporting structure 3 can be made of metal, plastic or other materials.
  • the support structure 3 can be molded by a metal powder injection molding process (MIM).
  • MIM metal powder injection molding process
  • the metal powder injection molding process is a new type of powder metallurgy near-net forming technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy.
  • the basic process is: first, the solid powder and the organic binder are uniformly mixed After being granulated, it is injected into the mold cavity with an injection molding machine under the heating and plasticizing state ( ⁇ 150°C) to be solidified, and then the binder in the formed blank is removed by chemical or thermal decomposition, and finally sintered Densification obtains the final product.
  • the product formed by this process has the same complex shape and high precision as the product obtained by plastic injection molding, and has physical, chemical and mechanical properties close to that of forgings. It can be equipped with a separate fillable area in accordance with the complex spatial structure of the back acoustic cavity.
  • a metal support structure with a certain strength is independent of the inside of the module cavity and does not make large-area contact with one or more surfaces of the inner cavity wall, which can ensure that most areas of the sound-absorbing cavity can be combined with the breathable spacer 4. That is to say, compared with the existing process technology, the use of this process will not be restricted by the cavity structure, hot melt process and processing accuracy, and it is easy to separately form various complex and high-precision support structures 3 in the rear acoustic cavity. It is of great help to improve the low-frequency acoustic performance of the speaker module.
  • the supporting structure 3 is made of plastic material, it can also be integrally formed by an injection molding process. This process is a more traditional process, so I won't repeat it here.
  • the supporting structure 3 can be a regular polyhedral structure or an irregular polyhedral structure.
  • the supporting structure 3 is set as a regular cuboid structure (ie, a hexahedron), and its overall It is a frame structure composed of multiple groups of support arms 31, including six different surfaces in the up and down, left and right directions, and front and rear directions, and these six surfaces are all open design, so that six breathable isolations can be set
  • the pieces 4 correspond to each surface of the support structure 3 and are fixed together with the support arms 31 correspondingly. It is easy to understand that the number, size and shape of the breathable spacers 4 can be flexibly adjusted according to the specific conditions of each surface of the support structure 3.
  • all six surfaces outside the frame can receive the vibrating sound waves of the sound generating unit, which can form a fully air-permeable sound-absorbing cavity, so as to achieve the effect of sufficient expansion of the sound-absorbing material, which can increase the virtual The volume of the back cavity.
  • the support structure 3 needs to be fixed in the second cavity 201, that is, it should be connected and fixed with the shell wall of the outer casing 1.
  • the outer The housing 1 is provided with a fixing portion 121 fixed to the supporting structure 3.
  • the fixing portion 121 may be a convex structure extending from the inner wall of the outer casing 1 in the direction of the supporting structure 3, and the convex structure connects the supporting structure 3 and the outer casing 1.
  • the raised structure can be set as a stepped bracket, or can be a raised connecting structure extending perpendicular to the inner surface of the shell wall to the support structure 3, etc.
  • the above-mentioned protrusions can be integrally formed with the outer shell 1 and fixed with the supporting structure 3 by means of glue or hot melt. Of course, it can also be a raised structure designed separately. It may also be a protrusion extending from the inner wall surface of the outer casing 1 to the outer surface direction (equivalent to a structure of a sink groove), and the part of the supporting structure 3 connected with the outer casing 1 may be directly accommodated in the protrusion.
  • the fixing portion 121 can be symmetrically arranged at the edge of the supporting structure 3, as shown in Figures 1 and 2 for example.
  • the four corner positions can also be two corner positions on the same side, and basic fixed connection can also be achieved.
  • the specific manner and position of the support structure 3 and the outer casing 1 to achieve fixation are not limited, nor are they used to limit the scope of implementation of the technical solution.
  • the support structure 3 can be separately molded by a metal powder injection molding process.
  • the five surfaces of the support structure 3 are provided with air-permeable spacers 4, and the air-permeable spacers 4 are never combined. Fill the side with sound-absorbing material, and then cover the air-permeable spacer 4 on this surface, thus forming an independent sound-absorbing cavity.
  • the sound-absorbing cavity is fixed to the outer casing 1 by the fixing portion 121 described above. After processing this part, proceed to the assembly of the sound unit 2 and the outer casing 1, so that it will not be directly or indirectly filled into the finished module due to the existing process, which may be caused by the adhesion of sound-absorbing particles, overflow, etc. Poor performance and appearance are discarded, and the production process is simple, which can reduce production costs.
  • the air-permeable spacer 4 may be a split structure, that is, a plurality of air-permeable spacers of equal numbers are arranged corresponding to different surfaces, and then fixed on each surface of the supporting structure 3 respectively.
  • it is not limited to this method. It can also be an integrally formed ring structure, or an integrally formed ring-shaped air-permeable spacer with four parts of the front and rear sides and left and right sides, and then two air-permeable spacers on the upper top surface and the lower bottom surface are respectively provided. Spacer.
  • the specific material of the air-permeable spacer 4 can be flexibly selected.
  • the air-permeable spacer 4 can be a metal mesh, which can be integrally formed with the support structure 3 through a metal powder injection process.
  • the air-permeable spacer 4 is a non-metallic mesh, such as a dust-proof net, non-woven fabric, filter paper, DuPont paper, and other air-permeable mesh members.
  • the above-mentioned non-metallic material breathable spacer is selected, it can be bonded and fixed with the support structure 3 or combined with injection molding.
  • the sound absorbing material in the sound absorbing cavity may be porous sound absorbing particles, such as particles of zeolite, amorphous carbon, molecular sieve, spherical carbon molecules, and the like.
  • porous sound absorbing particles such as particles of zeolite, amorphous carbon, molecular sieve, spherical carbon molecules, and the like.
  • the sound emitting device shown in this embodiment is a side sound emitting device, and the sound outlet 10 is provided on the side of the outer casing 1.
  • the sound outlet 10 can still be arranged at the position of the outer casing 1 facing the diaphragm 5, that is, the sound is being emitted, which does not affect the realization of the technical solution of the present invention.
  • the external casing 1 specifically includes a first casing 11 and a second casing 12 that are assembled with each other, wherein the sound outlet 5 and the fixing portion 121 are both provided in the On the second housing 12, the structure of the external housing and the housing corresponding to each component are not limited by this.
  • the outer shell 1 may also be composed of three-part shells, including a first shell, a second shell, and a third shell that are assembled with each other.
  • the specific arrangement of the sound outlet and the like are those skilled in the art. It is well known and will not be repeated here.
  • the support structure 3 except that the corner position is connected with the fixed portion 121, the rest of the main body on the six faces formed by the support arm 31 are all open, and the air permeability can be obtained.
  • the open areas on different surfaces of the support structure 3 may be uneven.
  • the support arms on the top surface of the support structure 3 may extend along the plane.
  • a relatively small opening is formed for assembling different design schemes such as the air-permeable spacer 4, etc., as long as it can ensure that each surface can allow the air flow on the back side of the diaphragm to pass.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The present invention provides a sound production apparatus, comprising an outer shell provided with an accommodating space, and a sound production unit mounted and fixed in an accommodating cavity, wherein the sound production unit comprises a vibration diaphragm; a first cavity is formed in a space between the front side of the vibration diaphragm and the outer shell; a second cavity is formed in a space between the back side of the vibration diaphragm and the outer shell; a part of the space in the second cavity is configured to be a sound absorption cavity; the sound absorption cavity is enclosed together by a supporting structure fixed in the second cavity and an air-permeable isolation member combined with the supporting structure; each surface of the supporting structure is at least partially configured in an open mode and used for assembling the air-permeable isolation member; the sound absorption cavity is filled with a sound absorption material. By means of the technical solution of the present invention, the sound absorption cavity is high in air permeability, the utilization rate of the space in the second cavity can be improved, and the acoustic performance of a product in a low frequency band is greatly improved.

Description

一种发声装置A sounding device 技术领域Technical field
本发明涉及电声产品技术领域，特别涉及一种发声装置。The invention relates to the technical field of electroacoustic products, in particular to a sound generating device.
背景技术Background technique
通常地，扬声器模组为了获得更好的声学效果，尤其是为了获得更好的低频效果，一般会在模组的后腔腔体内部填充吸音颗粒。现有技术中，对于吸音颗粒部分灌装的设计来说，主要的做法是在模组外壳形成的内腔中设置单独的填充区域，通过热熔网布或者插网的方式隔离吸音颗粒与发声单元。Generally, in order to obtain a better acoustic effect, especially in order to obtain a better low frequency effect, a speaker module generally fills the back cavity of the module with sound-absorbing particles. In the prior art, for the design of partial filling of sound-absorbing particles, the main method is to set a separate filling area in the cavity formed by the module shell, and isolate the sound-absorbing particles from the sound generation by means of hot-melt mesh or plug-in mesh. unit.
然而，这种做法存在着一定的弊端：一方面，目前这种产品设计的整体透气性差。单独的填充区域与发声单元仅通过两者中间的网布连通，无法形成振动声波的通气回路，很大程度上影响了吸音颗粒的扩容效果。这是因为颗粒的堆积使得最先接触发声单元端的能充分扩容，远离的部分颗粒起不到扩容的作用甚至由于堆积的原因起到了反作用。另一方面，扬声器模组的声学性能改善有限。网布主要是通过热熔或者粘结的方式固定，而这两种工艺均要求固定面必须为平面，所以填充区域的设置很大程度上受到腔体结构的限制，模组内部腔体空间难以得到充分利用，填充体积过小。However, this approach has certain drawbacks: On the one hand, the overall air permeability of the current product design is poor. The separate filling area and the sound unit are only connected through the mesh between the two, and cannot form a vibrating sound wave ventilation circuit, which greatly affects the expansion effect of the sound-absorbing particles. This is because the accumulation of particles makes the first contact with the end of the sounding unit to be able to fully expand, and the far away part of the particles does not have the effect of expansion and even has a counter effect due to the accumulation. On the other hand, the acoustic performance of the speaker module has limited improvement. The mesh cloth is mainly fixed by hot melt or bonding, and these two processes require that the fixed surface must be flat, so the setting of the filling area is largely limited by the cavity structure, and the cavity space inside the module is difficult It is fully utilized and the filling volume is too small.
因此，需要寻找一种新的解决方案，改善现有技术中的上述不足，满足扬声器性能的要求。Therefore, it is necessary to find a new solution to improve the above-mentioned shortcomings in the prior art and meet the requirements of speaker performance.
发明内容Summary of the invention
本发明的主要目的是提供一种声学装置，旨在解决现有技术中吸音区域整体透气性差以及受限于腔体结构导致的低频改善效果有限的问题。The main purpose of the present invention is to provide an acoustic device, which aims to solve the problems of poor air permeability of the sound absorption area as a whole and limited low frequency improvement effect due to the limitation of the cavity structure in the prior art.
为实现上述目的，本发明提出一种声学装置，包括具有收容空间的外部壳体以及安装固定在所述收容腔体内的发声单元，所述发声单元包括振膜，所述振膜的前侧与所述外部壳体之间的空间形成第一腔体，所述振膜的背侧与所述外部壳体之间的空间形成第二腔体，其中，In order to achieve the above objective, the present invention provides an acoustic device, which includes an external housing with a housing space and a sounding unit installed and fixed in the housing cavity. The sounding unit includes a diaphragm, and the front side of the diaphragm is connected to The space between the outer casings forms a first cavity, and the space between the back side of the diaphragm and the outer casing forms a second cavity, wherein,
所述第二腔体内的部分空间被设置为吸音腔体；所述吸音腔体由固定在所述第二腔体内的支撑结构以及与所述支撑结构相结合的透气隔离件共同围成；所述支撑结构的每个面上至少部分呈开放式设置，用以组配所述透气隔离件；所述吸音腔体的内部填充吸音材料。A part of the space in the second cavity is set as a sound-absorbing cavity; the sound-absorbing cavity is enclosed by a supporting structure fixed in the second cavity and a breathable spacer combined with the supporting structure; Each surface of the supporting structure is at least partially open, for assembling the air-permeable isolator; the sound-absorbing cavity is filled with sound-absorbing material.
优选地，所述支撑结构为金属材质。Preferably, the supporting structure is made of metal.
优选地，所述支撑结构通过金属粉末注射成型。Preferably, the support structure is formed by metal powder injection molding.
优选地，所述支撑结构为塑料材质，一体注塑成型。Preferably, the supporting structure is made of plastic material and is integrally injection molded.
优选地，所述支撑结构为规则/不规则的多面体结构。Preferably, the supporting structure is a regular/irregular polyhedral structure.
优选地，所述支撑结构的外形轮廓为规则的长方体框架结构，其中，所述支撑结构由支撑臂围成六个面，且六个面均呈开放式设置；所述透气隔离件对应设置有六个，分别固定在围成每个面的支撑臂上。Preferably, the outer contour of the supporting structure is a regular rectangular parallelepiped frame structure, wherein the supporting structure is surrounded by a supporting arm into six faces, and the six faces are arranged in an open manner; the air-permeable partition is correspondingly provided with Six, respectively, are fixed on the support arms surrounding each surface.
优选地，所述外部壳体上设置有与所述支撑结构固定的固定部，所述固定部对应于所述支撑结构的边缘位置设置。Preferably, a fixing part fixed to the supporting structure is provided on the outer shell, and the fixing part is arranged corresponding to an edge position of the supporting structure.
优选地，所述支撑结构的外形轮廓为规则的长方体框架结构，所述固定部为对应所述支撑结构的角部位置设置的凸起；所述凸起与所述外部壳体一体成型，并且与所述支撑结构通过涂胶或者热熔固定在一起。Preferably, the outer contour of the support structure is a regular rectangular parallelepiped frame structure, the fixing portion is a protrusion set corresponding to the corner position of the support structure; the protrusion is integrally formed with the outer casing, and And the supporting structure are fixed together by gluing or hot melt.
优选地，所述透气隔离件为分体结构，分别对应固定在所述支撑结构的每个面上；或者，所述透气隔离件为一体成型的结构。Preferably, the air-permeable spacer is a split structure, which is respectively fixed on each surface of the support structure; or, the air-permeable spacer is an integrally formed structure.
优选地，所述透气隔离件为金属网，与所述支撑结构通过金属粉末注射工艺一体成型；或者，所述透气隔离件为非金属网，与所述支撑结构粘结固定或者注塑结合。Preferably, the air-permeable spacer is a metal mesh, which is integrally formed with the support structure through a metal powder injection process; or, the air-permeable spacer is a non-metal mesh, which is bonded and fixed or combined with the support structure by injection molding.
优选地，所述吸音材料为多孔性吸音颗粒，所述透气隔离件的网孔的最大孔径小于所述吸音颗粒的最小粒径。Preferably, the sound-absorbing material is porous sound-absorbing particles, and the maximum pore size of the mesh of the air-permeable spacer is smaller than the minimum particle size of the sound-absorbing particles.
优选地，所述外部壳体上设置有出声口，所述振膜振动产生的气流在所述振膜的前侧经由所述第一腔体从所述出声口向外辐射；所述振膜振动产生的气流在所述振膜的背侧经由所述透气隔离件与所述吸音腔体连通。Preferably, the outer shell is provided with a sound outlet, and the airflow generated by the vibration of the diaphragm is radiated from the sound outlet on the front side of the diaphragm via the first cavity; The air flow generated by the vibration of the diaphragm is communicated with the sound-absorbing cavity via the air-permeable isolator on the back side of the diaphragm.
优选地，所述出声口设置于所述外部壳体的正对所述振膜的位置；或者，所述出声口设置在所述外部壳体的侧部。Preferably, the sound outlet is arranged at a position of the outer casing facing the diaphragm; or the sound outlet is arranged on a side of the outer casing.
优选地，所述外部壳体包括相互组配在一起的第一壳体和第二壳体；或者，所述外部壳体包括相互组配在一起的第一壳体、第二壳体和第三壳体。Preferably, the outer shell includes a first shell and a second shell that are assembled with each other; or, the outer shell includes a first shell, a second shell, and a second shell that are assembled with each other. Three shells.
本发明技术方案的发声装置，吸音腔体由各个面至少部分开放式设计的支撑框架结合透气隔离件共同围成，对于第二腔体内部分灌装吸音材料的发声装置来说，可以使得吸音腔体的每个面均能够接收到振膜振动产生的声波，即形成全面透气的灌装腔体，相较于现有技术而言，提高了吸音区域的整体透气性，吸音材料可充分扩容，更大程度的增大了虚拟后腔的体积。In the sound generating device of the technical solution of the present invention, the sound-absorbing cavity is enclosed by a supporting frame with at least partially open design on each surface and a breathable partition. For a sound-emitting device partially filled with sound-absorbing materials in the second cavity, the sound-absorbing cavity Each surface of the body can receive the sound waves generated by the vibration of the diaphragm, that is, a full-permeable filling cavity is formed. Compared with the prior art, the overall air permeability of the sound-absorbing area is improved, and the sound-absorbing material can be fully expanded. The volume of the virtual back cavity is increased to a greater extent.
进一步地，本发明技术方案的发声装置，其支撑框架可以采用金属粉末注射成型工艺制成，与现有工艺相比，不会受到腔体结构、热熔工艺及加工精度的限制，可以更加充分的利用第二腔体内的空间，进一步改善产品的低频声学性能。Furthermore, the support frame of the sound device of the technical scheme of the present invention can be made by a metal powder injection molding process. Compared with the existing process, it will not be restricted by the cavity structure, hot melt process and processing accuracy, and can be more adequate. The use of the space in the second cavity further improves the low-frequency acoustic performance of the product.
附图说明Description of the drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structures shown in these drawings.
图1是本发明声学装置一实施例的结构***图；Figure 1 is an exploded view of the structure of an embodiment of the acoustic device of the present invention;
图2是本发明声学装置一实施例的剖面示意图；2 is a schematic cross-sectional view of an embodiment of the acoustic device of the present invention;
图3为本发明声学装置一实施例的立体图。Figure 3 is a perspective view of an embodiment of the acoustic device of the present invention.
附图标号说明：Description with icon number:
1、外部壳体，10、出声口，101、第一腔体，102、第二腔体，11、第一壳体，12、第二壳体，121、固定部，2、发声单元，3、支撑结构，31、支撑臂，4、透气隔离件,5、振膜。1. External housing, 10, sound outlet, 101, first cavity, 102, second cavity, 11, first housing, 12, second housing, 121, fixing part, 2. sounding unit, 3. Support structure, 31. Support arm, 4. Breathable isolator, 5. Diaphragm.
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The realization of the objectives, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有 作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
需要说明，本发明实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。It should be noted that all directional indicators (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between components in a particular posture (as shown in the accompanying drawings). If the relative position relationship, movement situation, etc. change, the directional indication will change accordingly.
另外，在本发明中涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。In addition, the descriptions related to "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features.
本发明提出了一种声学装置，其包括具有收容空间的外部壳体以及安装固定在收容腔体内的发声单元，发声单元包括振膜，振膜的前侧与外部壳体之间的空间形成第一腔体，振膜的背侧与外部壳体之间的空间形成第二腔体。为了解决现有技术中吸音区域整体透气性不够以及受限于模组壳体结构从而对声学性能改善有限的问题，本发明的技术方案中在第二腔体内的部分空间被设置为吸音腔体，吸音腔体由固定在第二腔体内的支撑结构以及与支撑结构相结合的透气隔离件共同围成，支撑结构的每个面上至少部分呈开放式设置，用以组配所述透气隔离件，吸音腔体的内部填充吸音材料。The present invention proposes an acoustic device, which includes an external casing with a receiving space and a sounding unit installed and fixed in the receiving cavity. The sounding unit includes a diaphragm. The space between the front side of the diaphragm and the outer casing forms a second A cavity. The space between the back side of the diaphragm and the outer casing forms a second cavity. In order to solve the problems of insufficient overall air permeability of the sound-absorbing area in the prior art and limited improvement in acoustic performance due to the limitation of the module housing structure, in the technical solution of the present invention, part of the space in the second cavity is set as a sound-absorbing cavity , The sound-absorbing cavity is enclosed by a supporting structure fixed in the second cavity and a gas-permeable spacer combined with the supporting structure. Each surface of the supporting structure is at least partially open to assemble the gas-permeable spacer The inside of the sound-absorbing cavity is filled with sound-absorbing material.
实施例：Examples:
如图1、图2和图3共同所示，本实施例的发声装置具体包括外部壳体1，外部壳体1包括相互组配在一起的第一壳体11和第二壳体12，第一壳体11和第二壳体12组配后，形成收容腔体，发声单元2安装固定在该收容腔体中。发声单元2进一步包括振膜5，发声单元2将外壳壳体1形成的腔体分为两个腔体，具体地，振膜5的前侧与外部壳体1之间的空间形成第一腔体101，即发声装置的前声腔，第一腔体101与出声口10连通，振膜5振动产生的声波经过第一腔体101从出声口10处向外界辐射；振膜5的背侧与外部壳体1之间的空间形成第二腔体102，第二腔体102与第一腔体101是相互隔绝的，作为发声装置的后声腔，第二腔体102是声学密封的结构，将振膜振动在背侧产生的气流封闭在第二腔体102的空间之内，避免声短路。As shown in Fig. 1, Fig. 2 and Fig. 3 together, the sound generating device of this embodiment specifically includes an outer housing 1. The outer housing 1 includes a first housing 11 and a second housing 12 assembled with each other. After the first shell 11 and the second shell 12 are assembled, a receiving cavity is formed, and the sound generating unit 2 is installed and fixed in the receiving cavity. The sounding unit 2 further includes a diaphragm 5, and the sounding unit 2 divides the cavity formed by the outer casing 1 into two cavities. Specifically, the space between the front side of the diaphragm 5 and the outer casing 1 forms a first cavity The body 101 is the front acoustic cavity of the sound device. The first cavity 101 communicates with the sound outlet 10. The sound waves generated by the vibration of the diaphragm 5 radiate to the outside from the sound outlet 10 through the first cavity 101; the back of the diaphragm 5 The space between the side and the outer casing 1 forms a second cavity 102, the second cavity 102 and the first cavity 101 are isolated from each other, as the back acoustic cavity of the sound device, the second cavity 102 is an acoustically sealed structure , The airflow generated by the vibration of the diaphragm on the back side is enclosed in the space of the second cavity 102 to avoid acoustic short circuit.
为了优化发声装置在低频段的声学性能，第二腔体102内的部分空间被设置为吸音腔体，通过吸音材料增大腔体内的虚拟容积。本实施例中，吸引 腔体具体是由固定在第二腔体102内的支撑结构3以及与支撑结构3组配在一起的透气隔离件4共同围成的。其中，支撑结构3提供吸音腔体的外部框架，而透气隔离件4则主要贡献发声单元与吸音材料之间的气流流通并且阻隔吸音材料逸至发声单元2。为了使吸音材料能够与发声单元2充分接触，提高吸音腔体整体的透气性，本实施例中支撑结构3的每个面上都设置为至少部分为开放式设置，即在支撑结构的各个不同的面上都有至少部分敞口用以组配透气隔离件4，这样能够保证振膜5背侧产生的气流通过整个吸音腔体的各个面上的透气隔离件4形成一个通气回路，与吸音腔体连通起来，相比于现有技术中只有单面或者部分面上设置网布的做法而言，使得近发声单元端的吸音材料以及远离发声单元端的吸音材料都能够起到有效的扩容作用。In order to optimize the acoustic performance of the sound generating device in the low frequency band, part of the space in the second cavity 102 is set as a sound-absorbing cavity, and the virtual volume in the cavity is increased by the sound-absorbing material. In this embodiment, the suction cavity is specifically enclosed by the supporting structure 3 fixed in the second cavity 102 and the breathable spacer 4 assembled with the supporting structure 3. Wherein, the supporting structure 3 provides the outer frame of the sound-absorbing cavity, and the air-permeable spacer 4 mainly contributes to the air flow between the sound-emitting unit and the sound-absorbing material and prevents the sound-absorbing material from escaping to the sound-emitting unit 2. In order to enable the sound-absorbing material to fully contact the sound-emitting unit 2 and improve the air permeability of the entire sound-absorbing cavity, in this embodiment, each surface of the support structure 3 is set to be at least partially open, that is, in the different support structures. There are at least partial openings on the surface of the vent for assembling the air-permeable spacer 4, which can ensure that the air flow generated on the back side of the diaphragm 5 passes through the air-permeable spacer 4 on each surface of the entire sound-absorbing cavity to form a ventilating circuit, and the sound-absorbing The cavities are connected. Compared with the prior art method where only one side or part of the surface is provided with a mesh cloth, the sound absorbing material near the end of the sound unit and the sound absorbing material far away from the end of the sound unit can effectively expand the capacity.
可以选择的是，支撑结构3可以是金属材质，也可以是塑料或者其他材质。优选的是，当选用金属材质成型时，可通过金属粉末注射成型工艺(MIM)成型该支撑结构3。其中，金属粉末注射成型工艺是将现代塑料注射成型技术引入粉末冶金领域而形成的一门新型粉末冶金近净形成型技术，其基本的工艺过程是：首先将固体粉末与有机粘结剂均匀混练，经制粒后在加热塑化状态下(～150℃)用注射成形机注入模腔内固化成形，然后用化学或热分解的方法将成形坯中的粘结剂脱除，最后经烧结致密化得到最终产品。该工艺成型的产品具有与塑料注射成形法所得制品一样的复杂形状和高精度，而且具有与锻件接近的物理、化学与机械性能，可依后声腔复杂的空间结构在其可填充区域设置单独的具有一定强度的金属支撑结构，其独立于模组腔体内部，不与内腔壁体的一面或多面大面积接触，这样可以保证吸音腔体的大部分面积都可以结合透气隔离件4。也就是说，与现有工艺技术相比，使用该工艺不会受到腔体结构、热熔工艺及加工精度的限制，容易在后声腔内单独成型出各种复杂且精度高的支撑结构3，对改善扬声器模组低频的声学性能有很大的帮助。Optionally, the supporting structure 3 can be made of metal, plastic or other materials. Preferably, when a metal material is used for molding, the support structure 3 can be molded by a metal powder injection molding process (MIM). Among them, the metal powder injection molding process is a new type of powder metallurgy near-net forming technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. The basic process is: first, the solid powder and the organic binder are uniformly mixed After being granulated, it is injected into the mold cavity with an injection molding machine under the heating and plasticizing state (~150℃) to be solidified, and then the binder in the formed blank is removed by chemical or thermal decomposition, and finally sintered Densification obtains the final product. The product formed by this process has the same complex shape and high precision as the product obtained by plastic injection molding, and has physical, chemical and mechanical properties close to that of forgings. It can be equipped with a separate fillable area in accordance with the complex spatial structure of the back acoustic cavity. A metal support structure with a certain strength is independent of the inside of the module cavity and does not make large-area contact with one or more surfaces of the inner cavity wall, which can ensure that most areas of the sound-absorbing cavity can be combined with the breathable spacer 4. That is to say, compared with the existing process technology, the use of this process will not be restricted by the cavity structure, hot melt process and processing accuracy, and it is easy to separately form various complex and high-precision support structures 3 in the rear acoustic cavity. It is of great help to improve the low-frequency acoustic performance of the speaker module.
当然，如果支撑结构3选用塑料材质时，其也可以通过注塑工艺一体成型。该工艺属于较传统的工艺，在此不再赘述。Of course, if the supporting structure 3 is made of plastic material, it can also be integrally formed by an injection molding process. This process is a more traditional process, so I won't repeat it here.
在具体实施时，支撑结构3既可以是规则的多面体结构，也可以是不规则的多面体结构，以本实施例示出的为例，支撑结构3设置为规则的长方体结构(即六面体)，其整体是由多组支撑臂31共同组成的框架结构，包含在 上下方向、左右侧方向以及前后侧方向共六个不同的面，并且这六个面均呈开放式设计，这样可以设置六个透气隔离件4，分别对应到支撑结构3的每一个面上，与支撑臂31对应的固定在一起。容易理解的是，透气隔离件4的数量、尺寸和形状都可以根据支撑结构3每个面的具体情况进行灵活调整。除由支撑臂31构成的框体外的六个面均可接收到发声单元的振动声波，即可形成全面透气的吸音腔体，以达到吸音材料充分扩容的效果，可更大程度的增大虚拟后腔的体积。In the specific implementation, the supporting structure 3 can be a regular polyhedral structure or an irregular polyhedral structure. Taking the example shown in this embodiment as an example, the supporting structure 3 is set as a regular cuboid structure (ie, a hexahedron), and its overall It is a frame structure composed of multiple groups of support arms 31, including six different surfaces in the up and down, left and right directions, and front and rear directions, and these six surfaces are all open design, so that six breathable isolations can be set The pieces 4 correspond to each surface of the support structure 3 and are fixed together with the support arms 31 correspondingly. It is easy to understand that the number, size and shape of the breathable spacers 4 can be flexibly adjusted according to the specific conditions of each surface of the support structure 3. Except for the frame formed by the support arm 31, all six surfaces outside the frame can receive the vibrating sound waves of the sound generating unit, which can form a fully air-permeable sound-absorbing cavity, so as to achieve the effect of sufficient expansion of the sound-absorbing material, which can increase the virtual The volume of the back cavity.
本领域技术人员应该理解，支撑结构3需要固定在第二腔体201内，即应该与外部壳体1的壳壁之间连接固定，本实施例中，如图1和图2所示，外部壳体1上设置有与支撑结构3固定的固定部121。固定部121可以是自外部壳体1的内壁上向支撑结构3的方向延伸设置的凸起结构，该凸起结构将支撑结构3与外部壳体1连接起来。在具体实施时，凸起结构可以设置为台阶状的托架，也可以是垂直于壳壁内表面向支撑结构3延伸的凸起的结合结构等。上述的凸起可以与外部壳体1一体成型，并且与支撑结构3通过涂胶或者热熔的方式固定在一起。当然也可以是分体单独设计的凸起结构。还可以是自外部壳体1的内壁表面向外表面方向延伸的凸起(相当于沉槽的结构)，支撑结构3与外部壳体1相连接的部分可以直接容置在该凸起内。Those skilled in the art should understand that the support structure 3 needs to be fixed in the second cavity 201, that is, it should be connected and fixed with the shell wall of the outer casing 1. In this embodiment, as shown in FIGS. 1 and 2, the outer The housing 1 is provided with a fixing portion 121 fixed to the supporting structure 3. The fixing portion 121 may be a convex structure extending from the inner wall of the outer casing 1 in the direction of the supporting structure 3, and the convex structure connects the supporting structure 3 and the outer casing 1. In a specific implementation, the raised structure can be set as a stepped bracket, or can be a raised connecting structure extending perpendicular to the inner surface of the shell wall to the support structure 3, etc. The above-mentioned protrusions can be integrally formed with the outer shell 1 and fixed with the supporting structure 3 by means of glue or hot melt. Of course, it can also be a raised structure designed separately. It may also be a protrusion extending from the inner wall surface of the outer casing 1 to the outer surface direction (equivalent to a structure of a sink groove), and the part of the supporting structure 3 connected with the outer casing 1 may be directly accommodated in the protrusion.
此外，为了保证尽可能大的面积透气，并且与支撑结构3固定的稳固，优选的实施方案是，上述固定部121可对称设置在支撑结构3的边缘位置，例如图1、图2中示出的四角位置，实际上也可以是位于同侧的两个角部位置，也可以实现基本的固定连接。对本技术方案来说，支撑结构3与外部壳体1实现固定的具体方式和位置不受限制，也不用于限定本技术方案的实施范围。In addition, in order to ensure that the area is as large as possible, and to be firmly fixed to the supporting structure 3, a preferred embodiment is that the fixing portion 121 can be symmetrically arranged at the edge of the supporting structure 3, as shown in Figures 1 and 2 for example. In fact, the four corner positions can also be two corner positions on the same side, and basic fixed connection can also be achieved. For the technical solution, the specific manner and position of the support structure 3 and the outer casing 1 to achieve fixation are not limited, nor are they used to limit the scope of implementation of the technical solution.
本实施方式的发声装置，在装配时，可以先通过金属粉末注射成型工艺单独成型出支撑结构3，在支撑结构3的五个面上都设置透气隔离件4，再从未结合透气隔离件4的那一面上填充好吸音材料，后将透气隔离件4覆盖在该面上，这样形成一个独立的吸音腔体。吸音腔体通过上述的固定部121与外部壳体1固定。加工完该部分后，再进行发声单元2与外部壳体1等的组装，这样不会因现有工艺直接或间接地灌装于成品的模组内，因吸音颗粒粘附、外溢等导致的性能及外观不良报废，且制作工序简单，可以降低生产成本。When assembling the sound device of this embodiment, the support structure 3 can be separately molded by a metal powder injection molding process. The five surfaces of the support structure 3 are provided with air-permeable spacers 4, and the air-permeable spacers 4 are never combined. Fill the side with sound-absorbing material, and then cover the air-permeable spacer 4 on this surface, thus forming an independent sound-absorbing cavity. The sound-absorbing cavity is fixed to the outer casing 1 by the fixing portion 121 described above. After processing this part, proceed to the assembly of the sound unit 2 and the outer casing 1, so that it will not be directly or indirectly filled into the finished module due to the existing process, which may be caused by the adhesion of sound-absorbing particles, overflow, etc. Poor performance and appearance are discarded, and the production process is simple, which can reduce production costs.
可以理解的是，透气隔离件4可以是分体结构，即对应不同的面设置数量对等的多个透气隔离件，然后分别对应固定在支撑结构3的每个面上。但是并不局限于这种方式，也可以是一体成型的环状结构，或者是一体成型前后侧面及左右侧面四部分的环状透气隔离件，然后分别设置上顶面和下底面的两个透气隔离件。It is understandable that the air-permeable spacer 4 may be a split structure, that is, a plurality of air-permeable spacers of equal numbers are arranged corresponding to different surfaces, and then fixed on each surface of the supporting structure 3 respectively. However, it is not limited to this method. It can also be an integrally formed ring structure, or an integrally formed ring-shaped air-permeable spacer with four parts of the front and rear sides and left and right sides, and then two air-permeable spacers on the upper top surface and the lower bottom surface are respectively provided. Spacer.
透气隔离件4的具体材质可以灵活选择，例如，透气隔离件4可以为金属网，该金属网可以与支撑结构3通过金属粉末注射工艺一体成型。又或者，透气隔离件4为非金属网，例如防尘网、无纺布、滤纸、杜邦纸等透气性的网状部件。当选用上述非金属材质的透气隔离件时，其可以与支撑结构3粘结固定或者注塑结合在一起。The specific material of the air-permeable spacer 4 can be flexibly selected. For example, the air-permeable spacer 4 can be a metal mesh, which can be integrally formed with the support structure 3 through a metal powder injection process. Or, the air-permeable spacer 4 is a non-metallic mesh, such as a dust-proof net, non-woven fabric, filter paper, DuPont paper, and other air-permeable mesh members. When the above-mentioned non-metallic material breathable spacer is selected, it can be bonded and fixed with the support structure 3 or combined with injection molding.
本发明的发声装置，吸音腔体内的吸音材料可以为多孔性吸音颗粒，例如沸石、无定型碳、分子筛、球壳状碳分子等的颗粒。本领域技术人员可以理解的是，由于透气隔离件4承担着隔离发声单元2与吸音颗粒的功能，因此，分布于透气隔离件4上的网孔的最大孔径应当小于所填充的吸音颗粒的最小粒径，这样能够保证吸音颗粒不会从网孔出逸至发声单元2中。In the sound generating device of the present invention, the sound absorbing material in the sound absorbing cavity may be porous sound absorbing particles, such as particles of zeolite, amorphous carbon, molecular sieve, spherical carbon molecules, and the like. Those skilled in the art can understand that, since the air-permeable spacer 4 is responsible for the function of isolating the sound generating unit 2 from the sound-absorbing particles, the maximum aperture of the mesh distributed on the air-permeable spacer 4 should be smaller than the smallest of the sound-absorbing particles. Particle size, which can ensure that the sound-absorbing particles will not escape from the mesh to the sound unit 2.
需要说明的是，本实施方式示出的为侧出声的发声装置，其出声口10设置在外部壳体1的侧部，对于目前便携式终端普遍小型化、薄型化的设计而言，这种出声结构的发声装置具有更广泛的应用性。但是出声口10仍然可以设置在外部壳体1的正对振膜5的位置，即正出声，也不影响本发明的技术方案的实现。It should be noted that the sound emitting device shown in this embodiment is a side sound emitting device, and the sound outlet 10 is provided on the side of the outer casing 1. For the current portable terminal design that is generally miniaturized and thinner, this The sound device with sound structure has wider applicability. However, the sound outlet 10 can still be arranged at the position of the outer casing 1 facing the diaphragm 5, that is, the sound is being emitted, which does not affect the realization of the technical solution of the present invention.
另外，本实施方式示出的发声装置，其外部壳体1具体包括相互组配在一起的第一壳体11和第二壳体12，其中，出声口5及固定部121均设置在第二壳体12上，但具体实施时外部壳体的构成、各个部件对应安装的壳体等不受此限制。例如，外部壳体1还可以时由三部分壳体构成，包括相互组配在一起的第一壳体、第二壳体和第三壳体，出声口等的具体设置为本领域技术人员所熟知，不再赘述。In addition, in the sound generating device shown in this embodiment, the external casing 1 specifically includes a first casing 11 and a second casing 12 that are assembled with each other, wherein the sound outlet 5 and the fixing portion 121 are both provided in the On the second housing 12, the structure of the external housing and the housing corresponding to each component are not limited by this. For example, the outer shell 1 may also be composed of three-part shells, including a first shell, a second shell, and a third shell that are assembled with each other. The specific arrangement of the sound outlet and the like are those skilled in the art. It is well known and will not be repeated here.
再者，本实施方式示出的发声装置，其支撑结构3除角部位置与固定部121连接以外，支撑臂31构成的六个面上的其余主体部分均呈开放式设置，透气性可以得到较大提升。但在具体实施时，支撑结构3的各个不同面上的开放面积可以不均，比如考虑到支撑结构3的强度需求等，在支撑结构3的 顶面上支撑臂可以沿该平面有所延伸，形成相对较小一些的敞口用于组配透气隔离件4等等不同的设计方案，只要是能够保证每个面上都可以供振膜背侧的气流通过即可。Furthermore, in the sound generating device shown in this embodiment, the support structure 3, except that the corner position is connected with the fixed portion 121, the rest of the main body on the six faces formed by the support arm 31 are all open, and the air permeability can be obtained. Great improvement. However, in specific implementation, the open areas on different surfaces of the support structure 3 may be uneven. For example, considering the strength requirements of the support structure 3, the support arms on the top surface of the support structure 3 may extend along the plane. A relatively small opening is formed for assembling different design schemes such as the air-permeable spacer 4, etc., as long as it can ensure that each surface can allow the air flow on the back side of the diaphragm to pass.
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。The above descriptions are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Under the inventive concept of the present invention, equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect use Other related technical fields are included in the scope of patent protection of the present invention.

Claims (14)

  1. 一种发声装置，包括具有收容空间的外部壳体以及安装固定在所述收容腔体内的发声单元，所述发声单元包括振膜，所述振膜的前侧与所述外部壳体之间的空间形成第一腔体，所述振膜的背侧与所述外部壳体之间的空间形成第二腔体，其特征在于，A sounding device includes an outer casing with a containing space and a sounding unit installed and fixed in the containing cavity. The sounding unit includes a diaphragm, and a gap between the front side of the diaphragm and the outer casing The space forms a first cavity, and the space between the back side of the diaphragm and the outer casing forms a second cavity, characterized in that:
    所述第二腔体内的部分空间被设置为吸音腔体；所述吸音腔体由固定在所述第二腔体内的支撑结构以及与所述支撑结构相结合的透气隔离件共同围成；所述支撑结构的每个面上至少部分呈开放式设置，用以组配所述透气隔离件；所述吸音腔体的内部填充吸音材料。A part of the space in the second cavity is set as a sound-absorbing cavity; the sound-absorbing cavity is enclosed by a supporting structure fixed in the second cavity and a breathable spacer combined with the supporting structure; Each surface of the supporting structure is at least partially open, for assembling the air-permeable isolator; the sound-absorbing cavity is filled with sound-absorbing material.
  2. 根据权利要求1所述的发声装置，其特征在于，所述支撑结构为金属材质。The sound emitting device according to claim 1, wherein the supporting structure is made of metal.
  3. 根据权利要求2所述的发声装置，其特征在于，所述支撑结构通过金属粉末注射成型。3. The sound generating device according to claim 2, wherein the support structure is injection molded by metal powder.
  4. 根据权利要求1所述的发声装置，其特征在于，所述支撑结构为塑料材质，一体注塑成型。The sound generating device according to claim 1, wherein the supporting structure is made of plastic material and is integrally injection molded.
  5. 根据权利要求1所述的发声装置，其特征在于，所述支撑结构为规则/不规则的多面体结构。The sounding device according to claim 1, wherein the supporting structure is a regular/irregular polyhedron structure.
  6. 根据权利要求5所述的发声装置，其特征在于，所述支撑结构的外形轮廓为规则的长方体框架结构，其中，所述支撑结构由支撑臂围成六个面，且六个面均呈开放式设置；所述透气隔离件对应设置有六个，分别固定在围成每个面的支撑臂上。The sounding device according to claim 5, wherein the outline of the supporting structure is a regular rectangular parallelepiped frame structure, wherein the supporting structure is surrounded by supporting arms to form six faces, and all six faces are open Type arrangement; The breathable spacer is correspondingly provided with six, respectively fixed on the support arms surrounding each surface.
  7. 根据权利要求1所述的发声装置，其特征在于，所述外部壳体上设置有与所述支撑结构固定的固定部，所述固定部对应于所述支撑结构的边缘位 置设置。The sounding device according to claim 1, wherein a fixing part fixed to the supporting structure is provided on the outer casing, and the fixing part is arranged corresponding to an edge position of the supporting structure.
  8. 根据权利要求7所述的发声装置，其特征在于，所述支撑结构的外形轮廓为规则的长方体框架结构，所述固定部为对应所述支撑结构的角部位置设置的凸起；所述凸起与所述外部壳体一体成型，并且与所述支撑结构通过涂胶或者热熔固定在一起。The sounding device according to claim 7, wherein the outline of the supporting structure is a regular rectangular parallelepiped frame structure, and the fixing portion is a protrusion corresponding to the corner of the supporting structure; the convex It is integrally formed with the outer shell, and fixed with the supporting structure by gluing or hot melt.
  9. 根据权利要求1所述的发声装置，其特征在于，所述透气隔离件为分体结构，分别对应固定在所述支撑结构的每个面上；The sound emitting device according to claim 1, wherein the air-permeable isolator has a split structure and is fixed on each surface of the support structure respectively;
    或者，所述透气隔离件为一体成型的结构。Alternatively, the air-permeable spacer is an integrally formed structure.
  10. 根据权利要求1所述的发声装置，其特征在于，所述透气隔离件为金属网，与所述支撑结构通过金属粉末注射工艺一体成型；The sound generating device according to claim 1, wherein the air-permeable spacer is a metal mesh, which is integrally formed with the support structure through a metal powder injection process;
    或者，所述透气隔离件为非金属网，与所述支撑结构粘结固定或者注塑结合。Alternatively, the air-permeable spacer is a non-metal mesh, which is bonded and fixed with the support structure or combined with injection molding.
  11. 根据权利要求1所述的发声装置，其特征在于，所述吸音材料为多孔性吸音颗粒，所述透气隔离件的网孔的最大孔径小于所述吸音颗粒的最小粒径。The sound generating device according to claim 1, wherein the sound-absorbing material is porous sound-absorbing particles, and the maximum pore size of the mesh of the air-permeable spacer is smaller than the minimum particle size of the sound-absorbing particles.
  12. 根据权利要求1-11任一项所述的发声装置，其特征在于，所述外部壳体上设置有出声口，所述振膜振动产生的气流在所述振膜的前侧经由所述第一腔体从所述出声口向外辐射；所述振膜振动产生的气流在所述振膜的背侧经由所述透气隔离件与所述吸音腔体连通。The sound generating device according to any one of claims 1-11, wherein the outer shell is provided with a sound outlet, and the air flow generated by the vibration of the diaphragm passes through the front side of the diaphragm. The first cavity radiates outward from the sound outlet; the airflow generated by the vibration of the diaphragm is in communication with the sound-absorbing cavity via the air-permeable isolator on the back side of the diaphragm.
  13. 根据权利要求12所述的发声装置，其特征在于，所述出声口设置于所述外部壳体的正对所述振膜的位置；The sound emitting device according to claim 12, wherein the sound outlet is arranged at a position of the outer casing facing the diaphragm;
    或者，所述出声口设置在所述外部壳体的侧部。Alternatively, the sound outlet is provided on the side of the outer casing.
  14. 根据权利要求12所述的发声装置，其特征在于，所述外部壳体包括 相互组配在一起的第一壳体和第二壳体；The sound generating device according to claim 12, wherein the outer casing comprises a first casing and a second casing assembled with each other;
    或者，所述外部壳体包括相互组配在一起的第一壳体、第二壳体和第三壳体。Alternatively, the outer casing includes a first casing, a second casing, and a third casing assembled with each other.
PCT/CN2019/129015 2019-05-08 2019-12-27 Sound production apparatus WO2020224277A1 (en)

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